Power module and transformer

Abstract

The application provides a power module and a transformer. The power module comprises a shell body, an input module, a first power module and a second power module. The shell body comprises a first inner wall surface and a second inner wall surface, and the first inner wall surface and the second inner wall surface are spaced apart and opposite in the thickness direction of the power module. The input module is fixedly connected to the first inner wall surface of the shell body. The first power module is fixedly connected to the first inner wall surface of the shell body and connected to the input module. The second power module is fixedly connected to the second inner wall surface of the shell body, and the second power module is spaced apart and electrically connected to the first power module in the thickness direction of the power module, and the second power module is partially overlapped and spaced apart with the input module. The input module, the first power module and the second power module are insulated by the shell body. Thus, unlike the air insulation mode of the prior art, the insulation effect is strong, and it is beneficial to the miniaturization design of the power module.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrical equipment, in particular to a power module and a transformer. BACKGROUND

[0002] A transformer (Solid-State Transformers, SST) is also called an electronic power transformer (Electronic Power Transformer, EPT), which is a kind of static electrical equipment combining power electronic conversion technology and high-frequency electric energy conversion technology based on electromagnetic induction principle to realize the conversion of electric energy with one power feature into electric energy with another power feature. The SST can be used to convert medium and high voltage alternating current into low voltage direct current output. Among them, the PE (Protecting Earthing) on the medium voltage side of the SST needs to meet the basic insulation requirement of 10kV (Kilovolt, kilovolt), and the medium voltage side needs to meet the insulation requirement of 10kV to the low voltage side, and the insulation of the SST becomes a big challenge for the design of the SST. Most of the existing SST insulation schemes adopt air insulation, and the SST insulated by this scheme has the problem of large volume, which is not conducive to the miniaturization design of the SST. SUMMARY

[0003] The present application provides a power module and a transformer, which aims to greatly reduce the volume of the transformer on the basis of meeting the insulation requirement of the transformer, and realize the miniaturization design of the transformer.

[0004] In a first aspect, an embodiment of the present application provides a power module. The power module includes a shell body, an input module, a first power module, and a second power module. The shell body includes a first inner wall surface and a second inner wall surface, and the first inner wall surface and the second inner wall surface are spaced apart and opposite in the thickness direction of the power module. The input module is fixedly connected to the first inner wall surface of the shell body. The first power module is fixedly connected to the first inner wall surface of the shell body and connected to the input module. The second power module is fixedly connected to the second inner wall surface of the shell body, and the second power module and the first power module are spaced apart and electrically connected in the thickness direction of the power module, and the second power module and the input module are partially overlapped and spaced apart; wherein the input module, the first power module and the second power module are insulated by the shell body.

[0005] The power module provided in the application receives output alternating current (the output alternating current can be medium-voltage alternating current or high-voltage alternating current) through an input module, and the output alternating current is transmitted from the input module to a first power module. After being processed by the first power module, the first power module can output first output direct current (low-voltage current) to a load device for supplying the load device. A second power module receives the output alternating current transmitted from the input module through the first power module, and after being processed by the second power module, the second power module can output second output direct current (low-voltage current) to the load device for supplying the load device.

[0006] In the application, the input module, the first power module and the second power module are all grounded and insulated by the shell main body, and the input module, the first power module and the second power module realize pure solid insulation on the side of the ground through the shell main body. Thus, unlike the air insulation mode of the prior art, that is, air insulation is not required by meeting the insulation requirement through a large spacing, the insulation effect is strong, and the volume of the shell main body can be designed to be very small, which is conducive to reducing the volume of the power module and further conducive to the miniaturization design of the power module.

[0007] In a possible implementation, the power module comprises an insulating piece, and the insulating piece is fixedly connected between the first power module and the second power module.

[0008] Thus, the insulating piece is used to realize the insulation between the first power module and the second power module, which is conducive to reducing the spacing between the first power module and the second power module and conducive to the miniaturization design of the power module.

[0009] In a possible implementation, the shell main body comprises a first shell body and a second shell body, the input module and the first power module are fixedly connected to the first shell body, the second power module is fixedly connected to the second shell body, the second shell body is buckled with the first shell body and fixedly connected, in the thickness direction of the power module, the second power module and the first power module are located between the first shell body and the second shell body, the input module and the first power module are grounded and insulated by the first shell body, and the second power module is grounded and insulated by the second shell body.

[0010] Thus, the input module and the first power module realize pure solid insulation on the side of the ground through the first shell body, the second power module realizes pure solid insulation on the side of the ground through the second shell body, the volume of the first shell body and the second shell body can be designed to be very small, which is conducive to the miniaturization design of the power module. Moreover, the power module only needs to be fixedly connected with the first shell body and the second shell body to form a whole, and the structure is simple and stable, which simplifies the installation process of the power module and facilitates installation.

[0011] In a possible implementation, the first shell body includes a first shell and a first support, the first support is connected with the first shell, the first power module and the input module are located on a side of the first support away from the first shell and are fixedly connected with the first support, and the first support is used to insulate the first power module and the input module from the first shell.

[0012] The first power module and the input module of the first sub-module are grounded through the first shell of the first shell body. The first power module and the input module are insulated from the first shell through the first support, so that the first power module and the input module achieve pure solid insulation on a side of the ground through the first support, which is beneficial to the miniaturization design of the first sub-module and the power module.

[0013] In a possible implementation, the first support includes a first support part, the first power module is fixedly connected to a surface of the first support part, an inner part of the first support part is provided with a first conductive layer, the first conductive layer is electrically connected with the first power module, a surface of the first support part away from the first power module is provided with a second conductive layer, the first support part is laminated with the first shell, and the second conductive layer is located between the first support part and the first shell.

[0014] Since the first support part is laminated with the first shell and the second conductive layer is located between the first support part and the first shell, the second conductive layer is electrically connected with the first shell, the second conductive layer is grounded through the first shell, and the second conductive layer is connected to a PE potential. Since the first power module is electrically connected with the first conductive layer, the first conductive layer is connected to a medium-voltage potential. Through the first conductive layer and the second conductive layer, the insulation mode of the first power module on a side of the ground is equivalent to pure solid insulation, and an electric field on a medium-voltage side can be entirely on the first support part. In this way, not only is the insulation effect strong and the insulation requirement of the first power module on a side of the ground is met, but also the thickness of the first support part can be designed to be very small, which is beneficial to reducing the volume of the first sub-module and the miniaturization design of the first sub-module and the power module.

[0015] In a possible implementation, the first support includes a receiving part, the receiving part is fixedly connected with the first support part, the receiving part is provided with a receiving hole, the input module is at least partially received in the receiving hole, an inner part of the receiving part is provided with a third conductive layer, the third conductive layer is arranged around the receiving hole, the third conductive layer is electrically connected with the input module, an outer surface of the receiving part is provided with a fourth conductive layer, the fourth conductive layer is arranged around the receiving part, and the fourth conductive layer is electrically connected with the first shell.

[0016] The fourth conductive layer is grounded through the first shell due to the electrical connection between the fourth conductive layer and the first shell, and the fourth conductive layer is connected to the PE potential. The third conductive layer can be connected to the medium voltage potential due to the electrical connection between the input module and the third conductive layer. The insulation mode of the input module on the ground side is equivalent to pure solid insulation through the third conductive layer and the fourth conductive layer, and the electric field can be entirely on the accommodation part. In this way, not only the insulation effect is strong, but also the insulation requirement of the input module on the ground side is met, and the volume of the accommodation part can be designed to be very small, which is conducive to reducing the volume of the first sub-module and the miniaturization design of the power module.

[0017] In a possible implementation, the first power module includes a first receiving sub-module, a first conversion sub-module, and a first rectification sub-module, which are sequentially and spaced arranged and electrically connected in sequence. The first receiving sub-module is located at one end of the accommodation part and connected to the input module. The first receiving sub-module is electrically connected to the first conductive layer.

[0018] The first power module receives the output alternating current (medium voltage alternating current or high voltage alternating current) delivered from the input module through the first receiving sub-module. The first receiving sub-module is used for processing the output alternating current to output the first alternating current. The first alternating current is high-frequency medium voltage alternating current, and the frequency of the first alternating current is greater than that of the output alternating current. The first conversion sub-module is used for voltage conversion processing of the first alternating current to output the second alternating current, which is low voltage alternating current. The first rectification sub-module is used for rectification processing of the second alternating current to output the first output direct current.

[0019] The first receiving sub-module is electrically connected to the first conductive layer, and the ground side of the first receiving sub-module realizes pure solid insulation through the first support part. Since the ground side of the input module realizes pure solid insulation through the accommodation part, the medium voltage side of the first sub-module realizes pure solid insulation through the first support part. In addition, the first receiving sub-module and the first rectification sub-module can be insulated through the first conversion sub-module to meet the insulation requirement of the medium voltage side of the first power module to the low voltage side. In this way, it is conducive to reducing the distance between the first receiving sub-module and the first rectification sub-module, reducing the volume of the first power module, and miniaturizing the first sub-module, and further miniaturizing the power module.

[0020] In a possible implementation, the first conversion sub-module and the first rectification sub-module are located on the side of the first receiving sub-module facing the accommodation part, and the first conversion sub-module and the first rectification sub-module are located on one side of the accommodation part and are spaced apart from the accommodation part.

[0021] In this way, by the insulation of the receiving portion, the low-voltage electric field of the first conversion sub-module and the first receiving sub-module and the medium-voltage electric field of the input module do not intersect, which is conducive to reducing the distance between the first conversion sub-module and the input module, conducive to the miniaturization design of the first sub-module, and conducive to the miniaturization design of the power module.

[0022] In a possible implementation, the fourth conductive layer includes a matching end face, the first conversion sub-module includes a first input portion and a first output portion, the first output portion is coupled to the first input portion, and a first voltage conversion boundary is between the first input portion and the first output portion, the first voltage conversion boundary is flush with the matching end face, the first input portion is located on a side of the first output portion facing the first receiving sub-module and is electrically connected to the first receiving sub-module, and the first output portion is electrically connected to the first rectification sub-module.

[0023] The first alternating current output from the first receiving sub-module is transmitted to the first input portion. The first output portion of the first conversion sub-module can couple the second alternating current to the first rectification sub-module according to the first alternating current. The voltage of the second alternating current is lower than that of the first alternating current, and the second alternating current is low-voltage alternating current. The design that the matching end face is flush with the first voltage conversion boundary is conducive to reducing the electric field at the junction, avoiding the intersection of the low-voltage electric field of the first output portion and the medium-voltage electric field of the input module, and improving the insulation effect between the input module and the first output portion of the first conversion sub-module, which is conducive to reducing the distance between the first conversion sub-module and the input module, conducive to the miniaturization design of the first sub-module, and conducive to the miniaturization design of the power module.

[0024] In a possible implementation, the first receiving sub-module includes a first rectification unit and a first inversion unit, the first rectification unit is connected to the first inversion unit, the first inversion unit is electrically connected to the first conversion sub-module, and the first rectification unit is provided with a matching groove in which the input module is inserted and electrically connected to the first rectification unit.

[0025] Since the input module is inserted into the matching groove and electrically connected to the first rectification unit, the output alternating current transmitted from the input module can be transmitted to the first rectification unit. The first rectification unit is configured to rectify the output alternating current to output first direct current. The first direct current is medium-voltage direct current. The first direct current is transmitted from the first rectification unit to the first inversion unit. The first inversion unit is configured to invert the first direct current to output the first alternating current. Thus, the first receiving sub-module can output the first alternating current. The first alternating current is high-frequency medium-voltage alternating current, and the frequency of the first alternating current is higher than that of the output alternating current.

[0026] In a possible implementation, the input module includes a connecting piece, an input terminal, and an input fuse. The connecting piece is fixedly connected in the receiving hole. The input terminal is located on one side of the connecting piece, connected with the connecting piece, and received in the receiving hole. The input fuse is located on the other side of the connecting piece, connected with the connecting piece, and at least partially received in the receiving hole. The input terminal is electrically connected with the third conductive layer. The input fuse is electrically connected with the first power module and the third conductive layer.

[0027] The input module receives the output alternating current through the input terminal. The output alternating current is transmitted from the input terminal to the input fuse through the connecting piece. The input fuse is transmitted to the first power module. The input fuse is used for circuit protection, avoiding damage of the power module due to a short circuit problem, and is beneficial to improving the working safety of the power module. The input terminal and the input fuse are received in the receiving hole through the connecting piece, which is simple and stable in structure and facilitates installation. Since the input terminal and the input fuse are electrically connected with the third conductive layer, the input terminal and the input fuse achieve pure solid insulation on the ground side through the receiving part, which is strong in insulation effect and is beneficial to miniaturization design of the power module.

[0028] In a possible implementation, the second housing includes a second shell and a second support. The second support is connected with the second shell. The second power module of the second sub-module is located on the side of the second support away from the second shell and is fixedly connected with the second support. The second support is used for insulating the second power module from the second shell. The second shell is buckled with the first shell and is fixedly connected with the first shell. The second support is buckled with the first support and is fixedly connected with the first support.

[0029] The second power module of the second sub-module is grounded through the second shell of the second housing. The second power module is insulated from the second shell through the second support, so that the second power module achieves pure solid insulation on the ground side through the second support, which is beneficial to miniaturization design of the second sub-module and further beneficial to miniaturization design of the power module. In addition, the second sub-module and the first sub-module are assembled together through the fixed connection of the second support and the first support and the fixed connection of the second shell and the first shell, which is simple and stable in structure, simplifies the installation process of the power module, and facilitates installation.

[0030] In a possible implementation, the second support includes a first matching support part. The second power module is fixedly connected to the surface of the first matching support part. The first matching support part is internally provided with a first current-carrying layer. The first current-carrying layer is electrically connected with the second power module. The surface of the first matching support part away from the second power module is provided with a second current-carrying layer. The first matching support part is laminated with the second shell. The second current-carrying layer is located between the first matching support part and the second shell.

[0031] Since the first matching support part is laminated with the second shell, the second power conducting layer is located between the first matching support part and the second shell, the second power conducting layer is electrically connected with the second shell, the second power conducting layer is grounded through the second shell, and the second power conducting layer is connected to the PE potential. Since the second power module is electrically connected with the first power conducting layer, the first power conducting layer is connected to the medium voltage potential. Through the first power conducting layer and the second power conducting layer, the insulation mode of the second power module on the ground side is equivalent to pure solid insulation, and the electric field on the medium voltage side can be entirely on the first matching support part. In this way, not only the insulation effect is strong, and the insulation requirement of the second power module on the ground side is realized, but also the thickness size of the first matching support part can be designed to be very small, which is beneficial to reducing the volume of the second sub-module and is beneficial to the miniaturization design of the second sub-module and the power module.

[0032] In a possible implementation, the second power module includes a second receiving sub-module, a second conversion sub-module, and a second rectification sub-module, the second receiving sub-module, the second conversion sub-module, and the second rectification sub-module are sequentially and spacedly arranged and sequentially electrically connected, the second receiving sub-module is electrically connected with the first power conducting layer and the first receiving sub-module, and corresponds to the first receiving sub-module, the second conversion sub-module corresponds to the first conversion sub-module, and the second rectification sub-module corresponds to the first rectification sub-module.

[0033] Through the second receiving sub-module, the second power module receives the output alternating current (medium voltage alternating current or high voltage alternating current) from the input module through the first receiving sub-module of the first power module. The second receiving sub-module is used to process the output alternating current to output a third alternating current. The third alternating current is a high-frequency medium voltage alternating current, and the frequency of the third alternating current is greater than the frequency of the output alternating current. The second conversion sub-module is used to perform voltage conversion processing on the third alternating current to output a fourth alternating current, and the fourth alternating current is a low-voltage alternating current. The second rectification sub-module is used to perform rectification processing on the fourth alternating current to output a second output direct current.

[0034] The second receiving submodule is electrically connected with the first energizing layer, and the side of the second receiving submodule close to the ground is realized as pure solid insulation through the first matching support part. The side of the second receiving submodule close to the medium voltage is realized as pure solid insulation through the second support part. In addition, the second receiving submodule and the second rectifying submodule can be insulated through the second conversion submodule to realize the insulation requirement of the medium voltage side to the low voltage side of the second power module. In this way, the interval between the second receiving submodule and the second rectifying submodule is reduced, the volume of the second power module is reduced, the miniaturization design of the second submodule is facilitated, and the miniaturization design of the power module is facilitated. Moreover, the design that the second receiving submodule corresponds to the first receiving submodule, the second conversion submodule corresponds to the first conversion submodule, and the second rectifying submodule corresponds to the first rectifying submodule facilitates the insulation effect, reduces the interval between the first power module and the second power module, reduces the interval between the first receiving submodule and the first conversion submodule, reduces the interval between the second receiving submodule and the second conversion submodule, reduces the interval between the first conversion submodule and the first rectifying submodule, reduces the interval between the second conversion submodule and the second rectifying submodule, and facilitates the miniaturization design of the power module.

[0035] In a possible implementation, the second receiving submodule includes a second rectifying unit and a second inverting unit, the second rectifying unit is connected with the second inverting unit, the second inverting unit is electrically connected with the second conversion submodule, and the second rectifying unit is electrically connected with the first power module.

[0036] The output alternating current delivered from the input module can be delivered to the second rectifying unit through the first receiving submodule of the first power module. The second rectifying unit is configured to rectify the output alternating current to output second direct current. The second direct current is medium voltage direct current. The second direct current is delivered from the second rectifying unit to the second inverting unit. The second inverting unit is configured to invert the second direct current to output second alternating current. Thus, the second receiving submodule can output the second alternating current. The second alternating current is high-frequency medium voltage alternating current, and the frequency of the second alternating current is greater than the frequency of the output alternating current.

[0037] In a possible implementation, the first power module includes a first output terminal, the first output terminal is located on the side of the first rectifying submodule away from the first conversion submodule and connected with the first rectifying submodule, the second power module includes a second output terminal, the second output terminal is located on the side of the second rectifying submodule away from the second conversion submodule and connected with the second rectifying submodule, and the second output terminal corresponds to the first output terminal.

[0038] The first output DC current output by the first rectifier module is transmitted to the load device through the first output terminal. The second output DC current output by the second rectifier module is transmitted to the load device through the second output terminal. The design of the second output terminal and the first output terminal facilitates the electrical connection of the second output terminal and the first output terminal with the load device, reduces the complexity of the electrical connection of the power module with the load device, and is simple and beautiful.

[0039] In a possible implementation, the first power module comprises a first heat dissipation sub-module, the first heat dissipation sub-module is located on the side of the first receiving sub-module away from the first conversion sub-module, is arranged apart from the first receiving sub-module, and is electrically connected with the first rectifier module; the second power module comprises a second heat dissipation sub-module, the second heat dissipation sub-module is located on the side of the second receiving sub-module away from the second conversion sub-module, is arranged apart from the second receiving sub-module, and is electrically connected with the second rectifier module, and the second heat dissipation sub-module corresponds to the first heat dissipation sub-module.

[0040] The first output DC current output by the first rectifier module can be transmitted to the first heat dissipation sub-module to supply the first heat dissipation sub-module. The first heat dissipation sub-module is used for dissipating heat of the first power module and the input module. In this way, the temperature of the first power module and the input module during operation is prevented from rising too high, which is conducive to long-time operation of the first power module and the input module. The second output DC current output by the second rectifier module can be transmitted to the second heat dissipation sub-module to supply the second heat dissipation sub-module. The second heat dissipation sub-module is used for dissipating heat of the second power module. In this way, the temperature of the second power module during operation is prevented from rising too high, which is conducive to long-time operation of the second power module, and further conducive to long-time operation of the second sub-module and the power module.

[0041] Since the second heat dissipation sub-module corresponds to the first heat dissipation sub-module, and the second receiving sub-module corresponds to the first receiving sub-module, the distance between the first power module and the second power module is reduced, the distance between the first receiving sub-module and the first heat dissipation sub-module is reduced, the distance between the second receiving sub-module and the second heat dissipation sub-module is reduced, and the power module is miniaturized.

[0042] In a possible implementation, the first support member comprises a second support portion and a third support portion, the second support portion is fixedly connected to the side of the first support portion away from the receiving portion, the third support portion is fixedly connected to the side of the first support portion away from the second support portion and is fixedly connected to one end of the receiving portion, the second support member comprises a second matching support portion and a third matching support portion, the second matching support portion and the third matching support portion are fixedly connected to the two sides of the first matching support portion, the second matching support portion is fixedly connected with the third support portion and the receiving portion, and the third matching support portion is fixedly connected with the second support portion.

[0043] In this way, through the fixed connection of the second matching support part with the third support part and the accommodating part, and the fixed connection of the third matching support part with the second support part, the second support part is fixedly connected with the first support part, the second sub-module and the first sub-module are assembled together, the installation process is simplified, the installation time is reduced, and the assembly of the power module is facilitated.

[0044] In a second aspect, the embodiments of the present application further provide a transformer. The transformer comprises the plurality of power modules of any one of the first aspect and a main shell, and the plurality of power modules are accommodated in the main shell. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings required to be used in the embodiments of the present application or the background art will be described below.

[0046] Figure 1 is a structural block diagram of the transformer provided by the embodiments of the present application cooperating with an alternating current power supply and a load device;

[0047] Figure 2 is a three-dimensional structural schematic diagram of the power module provided by the embodiments of the present application;

[0048] Figure 3 is Figure 2 a three-dimensional structural exploded schematic diagram of the power module shown in FIG. 1;

[0049] Figure 4 is Figure 3 a three-dimensional structural schematic diagram of the first sub-module of the power module shown in FIG. 1;

[0050] Figure 5 is Figure 4 a three-dimensional structural exploded schematic diagram of the first sub-module shown in FIG. 1;

[0051] Figure 6 is Figure 5 a three-dimensional structural schematic diagram of the first shell of the first sub-module shown in FIG. 1;

[0052] Figure 7 is Figure 5 a three-dimensional structural schematic diagram of the first support part of the first sub-module shown in FIG. 1;

[0053] Figure 8 is Figure 7 a structural schematic diagram of the first support part shown in FIG. 1 from another angle;

[0054] Figure 9 is Figure 8 a structural schematic diagram of the first support part shown in FIG. 1 from still another angle;

[0055] Figure 10 is Figure 9A portion of the first support shown in the enlarged view along the L1-L1 line;

[0056] Figure 11 is Figure 10 A portion of the first support shown in the enlarged view along the L1-L1 line;

[0057] Figure 12 is Figure 9 A portion of the first support shown in the enlarged view along the L2-L2 line;

[0058] Figure 13 is Figure 8 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0059] Figure 13a is Figure 13 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0060] Figure 13b is Figure 13 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0061] Figure 14 is Figure 5 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0062] Figure 14a is Figure 14 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0063] Figure 14b is Figure 14 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0064] Figure 15 is Figure 5 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0065] Figure 16 is Figure 15 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0066] Figure 16a is Figure 15 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0067] Figure 17 is Figure 5 A portion of the first support shown in the enlarged view along the L3-L3 line;

[0068] Figure 18 is Figure 17The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0069] Figure 19 The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 18 The first shell, the first support and the input module shown in the partial cross-sectional view along L6-L6 line;

[0070] Figure 20 The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 5 The first receiving submodule and the first heat dissipation submodule of the first power module of the first submodule shown in the three-dimensional structural schematic view;

[0071] Figure 21 The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 20 The D part of the first power module shown in the enlarged view;

[0072] Figure 22 The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 20 The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0073] Figure 23 The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 5 The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0074] Figure 23a The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 23 The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0075] Figure 24 The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 23 The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0076] Figure 24a The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 5 The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0077] Figure 24b The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 5 The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0078] Figure 25 The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 2 The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0079] Figure 26 The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 2 The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0080] Figure 27 The first shell, the first support and the input module shown in the structural schematic view of another angle; Figure 26 The first shell, the first support and the input module shown in the structural schematic view of another angle;

[0081] Figure 28 is a perspective view of the second housing of the second subassembly shown in Figure 27

[0082] Figure 29 is a perspective view of the second support of the second subassembly shown in Figure 27

[0083] Figure 30 is a perspective view of the second support from another angle shown in Figure 29

[0084] Figure 31 is a sectional view of the second support along the line L8-L8 shown in Figure 30

[0085] Figure 32 is a perspective view of the second housing and the second support of the second subassembly shown in Figure 27

[0086] Figure 33 is a partial sectional view of the second housing and the second support along the line L9-L9 shown in Figure 32

[0087] Figure 34 is a perspective view of the second receiving subassembly and the second heat dissipation subassembly of the second power module of the second subassembly shown in Figure 27

[0088] Figure 35 is a block diagram of the second power module of the second subassembly shown in Figure 27

[0089] Figure 35a is a perspective view of the second subassembly from another angle shown in Figure 27

[0090] Figure 36 is a partial sectional view of the second subassembly along the line L10-L10 shown in Figure 35a

[0091] Figure 36a is a perspective view of the second conversion subassembly of the second power module of the second subassembly shown in Figure 27

[0092] Figure 36b is a perspective view of the second rectification subassembly of the second power module of the second subassembly shown in Figure 27

[0093] Figure 37 Figure 2 ​​​​​​​​​​​​​A partial structural schematic view of the power module shown from another angle;

[0094] Figure 38 A Figure 2 A partial sectional view of the power module shown along the line L11-L11;

[0095] Figure 39 A Figure 2 A sectional view of the power module shown along the line L12-L12;

[0096] Figure 40 A Figure 2 A partial sectional view of the power module shown along the line L13-L13. DETAILED DESCRIPTION

[0097] The embodiment of the present application provides a power module applied to a transformer. The transformer applying the power module not only greatly reduces the self volume and is beneficial to the miniaturization design of the transformer on the basis of realizing the insulation requirements of the medium voltage side to ground and the medium voltage side to the low voltage side thereof. In the present application, the connection of the component A and the component B refers to the direct connection or indirect connection of the component A and the component B; wherein, the connection includes the fixed connection and the electrical connection.

[0098] The power module provided by the present application comprises a shell body, an input module, a first power module and a second power module. The shell body comprises a first inner wall surface and a second inner wall surface, and the first inner wall surface and the second inner wall surface are spaced apart and opposite in the thickness direction of the power module. The input module is fixedly connected to the first inner wall surface of the shell body. The first power module is fixedly connected to the first inner wall surface of the shell body and connected to the input module. The second power module is fixedly connected to the second inner wall surface of the shell body, and the second power module and the first power module are spaced apart and electrically connected in the thickness direction of the power module, and the second power module and the input module are partially overlapped and spaced apart; wherein, the input module, the first power module and the second power module are insulated by the shell body ground.

[0099] The power module provided by the present application receives output alternating current (the output alternating current can be medium voltage alternating current or high voltage alternating current) through the input module, and the output alternating current is delivered from the input module to the first power module. After being processed by the first power module, the first power module can output first output direct current (low voltage current) to the load device for supplying the load device. The second power module receives the output alternating current delivered from the input module through the first power module, and after being processed by the second power module, the second power module can output second output direct current (low voltage current) to the load device for supplying the load device.

[0100] In the structure, since the input module, the first power module and the second power module are all insulated from the ground through the shell main body, the input module, the first power module and the second power module realize pure solid insulation on the side of the ground through the shell main body. In this way, unlike the air insulation mode of the prior art, that is, without the need to realize air insulation through a large spacing meeting the insulation requirement, not only the insulation effect is strong, but also the volume of the shell main body can be designed to be very small, which is conducive to reducing the volume of the power module, and further conducive to the miniaturization design of the power module.

[0101] The embodiments of the present application will be described below with reference to the accompanying drawings of the embodiments of the present application.

[0102] Please refer to Figure 1 , Figure 1 is a structural block diagram of the transformer 100 cooperating with the alternating current power supply 200 and the load device 300. In some embodiments, the transformer 100 is used to convert the output alternating current output by the alternating current power supply 200 into load direct current, and deliver the load direct current to the load device 300 for supplying the load device 300. The load device 300 can be an electronic device using or transmitting low-voltage direct current, including but not limited to a mobile phone, a notebook computer, a wearable device, etc., which is not specifically limited by the present application. Among them, the voltage of the load direct current is less than the voltage of the output alternating current. For example, the output alternating current is medium-voltage alternating current, and the load direct current is low-voltage direct current.

[0103] For example, the alternating current power supply 200 is a three-phase power supply, for example, the alternating current power supply 200 can be a power grid. The alternating current power supply 200 includes a plurality of output terminals 201, each output terminal 201 being used to output the output alternating current. Specifically, the plurality of output terminals 201 includes a first output terminal 201a, a second output terminal 201b and a third output terminal 201c. The first output terminal 201a is used to output the first output alternating current. The second output terminal 201b is used to output the second output alternating current. The third output terminal 201c is used to output the third output alternating current.

[0104] In some embodiments, the transformer 100 includes a main shell 101 and a plurality of power modules 102. The main shell 101 is used as the protective ground of the transformer 100. The plurality of power modules 102 are accommodated in the main shell 101, the plurality of power modules 102 are connected with the main shell 101, and the plurality of power modules 102 are grounded through the main shell 101. For example, the main shell 101 is made of conductive material, such as aluminum. In other embodiments, the main shell 101 can also be made of other metal materials such as copper, iron or other conductive materials, which are not specifically limited by the present application.

[0105] Each power module 102 is electrically connected with the output end 201 of the AC power supply 200 and the load device 300, and is used to convert the output AC power output by the output end 201 into load DC power, and deliver the load DC power to the load device 300 for supplying the load device 300. Specifically, the plurality of power modules 102 include a first power module 102a, a second power module 102b and a third power module 102c. The first power module 102a is electrically connected with the first output end 201a of the AC power supply 200 and the load device 300, and the first power module 102 is used to convert the first output AC power into first load DC power, and deliver the first load DC power to the load device 300 for supplying the load device 300. Wherein, the voltage of the first load DC power is less than the voltage of the first output AC power.

[0106] The second power module 102b is electrically connected with the second output end 201b of the AC power supply 200 and the load device 300, and the second power module 102b is used to convert the second output AC power into second load DC power, and deliver the second load DC power to the load device 300 for supplying the load device 300. Wherein, the voltage of the second load DC power is less than the voltage of the second output AC power.

[0107] The third power module 102c is electrically connected with the third output end 201c of the AC power supply 200 and the load device 300, and the third power module 102c is used to convert the third output AC power into third load DC power, and deliver the third load DC power to the load device 300 for supplying the load device 300. Wherein, the voltage of the third load DC power is less than the voltage of the third output AC power. Thus, the output AC power output by the AC power supply 200 can be converted into load DC power by the transformer 100 for supplying the load device 300.

[0108] Next, the power module 102 provided by the embodiment of the present application is specifically described in combination with the accompanying drawings.

[0109] Please refer to Figure 2 and Figure 3 in combination with Figure 1 , Figure 2 is a perspective structural schematic diagram of the power module 102 provided by the embodiment of the present application. Figure 3 is Figure 2 a perspective structural exploded schematic diagram of the power module 102 shown in

[0110] The power module 102 comprises a first sub-module 1, an insulating member 2, and a second sub-module 3. The second sub-module 3 is arranged opposite to the first sub-module 1 and is connected to the first sub-module 1. The insulating member 2 is fixedly connected between the first sub-module 1 and the second sub-module 3. The first sub-module 1 and the second sub-module 3 are both in contact with and connected to the main shell 101, and the first sub-module 1 and the second sub-module 3 are grounded through the main shell 101. The insulating member 2 is not in contact with the main shell 101, and the first sub-module 1 and the second sub-module 3 are insulated through the insulating member 2.

[0111] The first sub-module 1 is electrically connected to the output end 201 of the alternating current power supply 200 and the load device 300. The first sub-module 1 is configured to convert output alternating current output from the output end 201 of the alternating current power supply 200 into first output direct current, and deliver the first output direct current to the load device 300 for supplying the load device 300. The second sub-module 3 is electrically connected to the load device 300. The second sub-module 3 receives the output alternating current output from the output end 201 of the alternating current power supply 200 through the first sub-module 1. The second sub-module 3 is configured to convert the output alternating current into second output direct current, and deliver the second output direct current to the load device 300 for supplying the load device 300. The power module 102 converts one way of output alternating current output from the output end 201 of the alternating current power supply 200 into first output direct current and second output direct current, and delivers the first output direct current and the second output direct current to the load device 300 for supplying the load device 300. It can be understood that the load direct current delivered to the load device 300 by each power module 102 comprises two ways of output direct current.

[0112] It should be noted that, for the convenience of the following description, the width direction of the power module 102 is defined as the X-axis direction, the length direction of the power module 102 is defined as the Y-axis direction, and the thickness direction of the power module 102 is defined as the Z-axis direction.

[0113] Please refer to Figure 4 , Figure 5 and Figure 6 , and in combination with Figure 1 , Figure 4 is a perspective structural schematic view of the first sub-module 1 of the power module 102 shown in Figure 3 . Figure 5 is an exploded perspective structural schematic view of the first sub-module 1 shown in Figure 4 . Figure 6 is a perspective structural schematic view of the first shell 10 of the first sub-module 1 shown in Figure 5 .

[0114] As Figure 1 , Figure 4 and Figure 5As shown, in some embodiments, the first sub-module 1 includes a first shell 10, a first support 20, an input module 30, and a first power module 40. The first shell 10 is used for grounding. The first support 20 is connected with the first shell 10. The input module 30 is located on the side of the first support 20 away from the first shell 10 and is fixedly connected with the first support 20. The input module 30 is insulated from the first shell 10 through the first support 20. The first power module 40 is located on the side of the first support 20 away from the first shell 10 and is fixedly connected with the first support 20 and connected with the input module 30. The first power module 40 is insulated from the first shell 10 through the first support 20. In other words, the first power module 40 and the input module 30 are located on the side of the first support 20 away from the first shell 10 and are fixedly connected with the first support 20, the first power module 40 and the input module 30 are connected, and the first support 20 is used for insulating the first power module 40 and the input module 30 from the first shell 10.

[0115] It can be understood that the first shell 10 and the first support 20 constitute a first outer shell, that is, the first outer shell includes the first shell 10 and the first support 20, and the first support 20 is connected with the first shell 10. That is to say, the first sub-module 1 includes the first outer shell, the input module 30, and the first power module 40, the input module 30 and the first power module 40 are fixedly connected with the first outer shell, and the first power module 40 and the input module 30 are connected. The input module 30 and the first power module 40 are insulated from the ground through the first outer shell. The input module 30 is electrically connected with the output end 201 of the alternating current power supply 200. The first power module 40 is electrically connected with the load device 300. The input module 30 is used for receiving the output alternating current output from the output end 201 and transmitting the output alternating current to the first power module 40. The first power module 40 is used for converting the output alternating current into first output direct current and transmitting the first output direct current to the load device 300 for supplying the load device 300.

[0116] As shown in Figure 1 and Figure 6 As shown, the first shell 10 is made of copper. In other embodiments, the first shell 10 can also be made of other metal materials such as aluminum, iron, or other conductive materials, which are not limited in the present application. The first shell 10 is in contact with and connected with the main shell 101 through modes including but not limited to gluing, welding, or buckling connection, and the first shell 10 is grounded through the main shell 101.

[0117] In some embodiments, the first shell 10 comprises a first connecting portion 11, a second connecting portion 12 and a third connecting portion 13. In the X-axis direction, the first connecting portion 11 is connected between the second connecting portion 12 and the third connecting portion 13, the second connecting portion 12 and the third connecting portion 13 are arranged opposite and spaced apart. The second connecting portion 12 and the third connecting portion 13 are arranged in parallel. The second connecting portion 12, the first connecting portion 11 and the third connecting portion 13 are sequentially enclosed to form the first mounting groove 14. For example, the first connecting portion 11, the second connecting portion 12 and the third connecting portion 13 are integrally formed, which is conducive to improving the overall strength of the first shell 10. It should be noted that in this application, the parallel or perpendicular between feature A and feature B allows for a certain tolerance range.

[0118] For example, the first connecting portion 11, the second connecting portion 12 and the third connecting portion 13 are all rectangular plates. In other embodiments, the first connecting portion 11, the second connecting portion 12 and the third connecting portion 13 can also be circular cylinders, trapezoidal plates or other shapes, and the shape of the first connecting portion 11, the second connecting portion 12 and the third connecting portion 13 is not limited in this application.

[0119] The first connecting portion 11 comprises a first surface 111. The second connecting portion 12 is arranged on the first surface 111 and arranged perpendicularly to the first connecting portion 11. The second connecting portion 12 comprises a second surface 121 and a third surface 122, the third surface 122 is arranged perpendicularly to the second surface 121 and connected to the second surface 121. Among them, in the X-axis direction, the second surface 121 is located on one side of the first surface 111 and connected to the first surface 111, and arranged perpendicularly to the first surface 111. In the Z-axis direction, the third surface 122 is located at one end of the second surface 121 away from the first surface 111, and the third surface 122 is arranged in parallel and spaced apart from the first surface 111. In the X-axis direction, the third surface 122 is located on the side of the second surface 121 away from the first surface 111.

[0120] The third connecting portion 13 comprises a fourth surface 131 and a fifth surface 132. The fifth surface 132 is arranged perpendicularly to the fourth surface 131 and is connected to the fourth surface 131. In the X-axis direction, the fourth surface 131 is located on the side of the first surface 111 away from the second surface 121 and is connected to the first surface 111 and arranged perpendicularly to the first surface 111. In the X-axis direction, the fourth surface 131 is parallel to and spaced apart from the second surface 121. In the Z-axis direction, the fifth surface 132 is located at one end of the fourth surface 131 away from the first surface 111 and is parallel to and spaced apart from the first surface 111. In the X-axis direction, the fifth surface 132 is located on the side of the fourth surface 131 away from the first surface 111. The fifth surface 132 is flush with the third surface 122. In some other embodiments, the fifth surface 132 can not be flush with the third surface 122. It can be understood that the first surface 111, the second surface 121 and the fourth surface 131 are the walls of the first mounting groove 14.

[0121] Please refer to Figure 7 , Figure 8 and Figure 9 , Figure 7 is a perspective structural schematic view of the first support 20 of the first sub-module 1 shown in Figure 5 . Figure 8 is a structural schematic view of the first support 20 from another angle shown in Figure 7 . Figure 9 is a structural schematic view of the first support 20 from yet another angle shown in Figure 8 .

[0122] Illustratively, the first support 20 is made of an insulating material, such as silica gel or plastic, which is not specifically limited in the present application. In some embodiments, the first support 20 comprises a first support portion 21, a second support portion 22, a third support portion 23 and a receiving portion 24. In the X-axis direction, the second support portion 22 is located on one side of the first support portion 21 and is fixedly connected to the first support portion 21; the third support portion 23 and the receiving portion 24 are located on the other side of the first support portion 21 and are fixedly connected to the first support portion 21. In the Y-axis direction, the receiving portion 24 is located at one end of the third support portion 23 and is fixedly connected to the third support portion 23, i.e., the third support portion 23 is located at one end of the receiving portion 24 and is fixedly connected to the receiving portion 24. Illustratively, the first support portion 21, the second support portion 22, the third support portion 23 and the receiving portion 24 are integrally formed, which is conducive to improving the overall strength of the first support 20. In other words, the receiving portion 24 is located on one side of the first support portion 21 and is fixedly connected to the first support portion 21. The second support portion 22 is fixedly connected to the side of the first support portion 21 away from the receiving portion 24, and the third support portion 23 is fixedly connected to the side of the first support portion 21 away from the second support portion 22 and is fixedly connected to one end of the receiving portion 24.

[0123] The first support portion 21 is exemplarily a plate body. In other embodiments, the first support portion 21 can also be a column body, or a block body, or other shapes, which are not specifically limited in the present application. The first support portion 21 comprises a first support surface 211 and a second support surface 212. The first support surface 211 and the second support surface 212 are oppositely arranged and parallelly arranged in the Z-axis direction.

[0124] The second support portion 22 is exemplarily a plate body. In other embodiments, the second support portion 22 can also be a column body, or a block body, or other shapes, which are not specifically limited in the present application. The second support portion 22 comprises a first wall surface 221, a second wall surface 222, and a third wall surface 223. The first wall surface 221 and the second wall surface 222 are oppositely arranged and parallelly arranged in the X-axis direction. The third wall surface 223 is connected between the first wall surface 221 and the second wall surface 222, and is perpendicularly arranged with the first wall surface 221 and the second wall surface 222. In the Z-axis direction, the first wall surface 221 is located on a side of the first support surface 211 away from the second support surface 212. In the X-axis direction, the first wall surface 221 is located on a side of the first support surface 211 and is connected with the first support surface 211, and is perpendicularly arranged with the first support surface 211. In the X-axis direction, the second wall surface 222 is located on a side of the first wall surface 221 away from the first support surface 211, and is located on a side of the second support surface 212 and is connected with the second support surface 212, and is perpendicularly arranged with the second support surface 212. In the Z-axis direction, the third wall surface 223 is located on a side of the first support surface 211 away from the second support surface 212, and is parallelly and spacedly arranged with the first support surface 211.

[0125] Exemplarily, the third support portion 23 is a plate body. In other embodiments, the third support portion 23 can also be a column body, or a block body, or other shapes, which are not specifically limited in the present application. The third support portion 23 comprises a fourth wall surface 231, a fifth wall surface 232, and a sixth wall surface 233. In the X-axis direction, the fourth wall surface 231 and the fifth wall surface 232 are oppositely arranged and parallel. The sixth wall surface 233 is connected between the fourth wall surface 231 and the fifth wall surface 232, and is arranged perpendicularly to the fourth wall surface 231 and the fifth wall surface 232. Among them, in the Z-axis direction, the fourth wall surface 231 is located on the side of the first support surface 211 away from the second support surface 212. In the X-axis direction, the fourth wall surface 231 is located on the side of the first support surface 211 away from the first wall surface 221, and is connected to the first support surface 211 and arranged perpendicularly to the first support surface 211. In the X-axis direction, the fifth wall surface 232 is located on the side of the fourth wall surface 231 away from the first support surface 211, and is located on the side of the second support surface 212 away from the second wall surface 222, and is connected to the second support surface 212 and arranged perpendicularly to the second support surface 212. In the Z-axis direction, the sixth wall surface 233 is located on the side of the first support surface 211 away from the second support surface 212, and is arranged parallel to and spaced apart from the first support surface 211.

[0126] Exemplarily, the receiving portion 24 is a rectangular column body. In other embodiments, the receiving portion 24 can also be a circular column body, or a trapezoidal column body, or other shapes, which are not specifically limited in the present application. The receiving portion 24 comprises a first support wall surface 241, a second support wall surface 242, a third support wall surface 243, a fourth support wall surface 244, a first support end surface 245, and a second support end surface 246. In the Z-axis direction, the first support wall surface 241 and the second support wall surface 242 are oppositely arranged and parallel. In the X-axis direction, the third support wall surface 243 and the fourth support wall surface 244 are oppositely arranged and parallel. The third support wall surface 243 and the fourth support wall surface 244 are both connected between the first support wall surface 241 and the second support wall surface 242, and are arranged perpendicularly to the first support wall surface 241 and the second support wall surface 242. In the Y-axis direction, the first support end surface 245 and the second support end surface 246 are oppositely arranged and parallel. The first support end surface 245 is connected between the first support wall surface 241 and the second support wall surface 242, and is connected between the third support wall surface 243 and the fourth support wall surface 244. The first support end surface 245 is arranged perpendicularly to the first support wall surface 241, the second support wall surface 242, the third support wall surface 243, and the fourth support wall surface 244. The second support end surface 246 is connected between the first support wall surface 241 and the second support wall surface 242, and is connected between the third support wall surface 243 and the fourth support wall surface 244. The second support end surface 246 is arranged perpendicularly to the first support wall surface 241, the second support wall surface 242, the third support wall surface 243, and the fourth support wall surface 244.

[0127] The third support wall surface 243 is located on the side of the first support surface 211 and the second support surface 212 away from the first wall surface 221 and is connected to the first support surface 211 and the second support surface 212 in the X-axis direction. The third support wall surface 243 is arranged perpendicularly to the first support surface 211 and the second support surface 212. The second support end surface 246 faces the third support portion 23 in the Y-axis direction. The third support portion 23 is arranged on the second support end surface 246.

[0128] The first support wall surface 241 is located on the side of the third support wall surface 243 away from the first support surface 211 and the second support surface 212 in the X-axis direction. The first support wall surface 241 is arranged spaced apart from the first support surface 211 on the side of the first support surface 211 away from the second support surface 212 in the Z-axis direction. The first support wall surface 241 is flush with the sixth wall surface 233. The second support wall surface 242 is located on the side of the third support wall surface 243 away from the first support surface 211 and the second support surface 212 in the X-axis direction. The second support wall surface 242 is parallel to the second support surface 212 and is connected to the second support surface 212 on the side of the first support surface 211 away from the second support surface 212 in the Z-axis direction. The second support wall surface 242 is flush with the second support surface 212. The fourth support wall surface 244 is located on the side of the fourth wall surface 231 facing the fifth wall surface 232 in the X-axis direction and is connected to and arranged parallel to the fifth wall surface 232. The fourth support wall surface 244 is flush with the fifth wall surface 232. The first support end surface 245 is located on the side of the second support end surface 246 away from the third support portion 23 in the Y-axis direction.

[0129] The accommodation portion 24 is provided with an accommodation hole 247. The accommodation hole 247 extends in the Y-axis direction. The accommodation hole 247 has two openings, one of which is located on the first support end surface 245 and the other of which is located on the second support end surface 246. In other words, the accommodation hole 247 penetrates the accommodation portion 24 in the Y-axis direction. The accommodation hole 247 includes a first hole wall 2471, a second hole wall 2472, a third hole wall 2473, and a fourth hole wall 2474. The first hole wall 2471 and the second hole wall 2472 are arranged opposite to and parallel to each other in the Z-axis direction. The third hole wall 2473 and the fourth hole wall 2474 are arranged opposite to and parallel to each other in the X-axis direction. The third hole wall 2473 and the fourth hole wall 2474 are connected between the first hole wall 2471 and the second hole wall 2472 and are arranged perpendicularly to the first hole wall 2471 and the second hole wall 2472. The second hole wall 2472 is flush with the first support surface 211. The first hole wall 2471 is located on the side of the second hole wall 2472 away from the second support surface 212. The fourth hole wall 2474 is flush with the fourth wall surface 231. The third hole wall 2473 is located on the side of the fourth hole wall 2474 away from the fifth wall surface 232.

[0130] As Figure 7 and Figure 9 shown, in some embodiments, the first support 20 is provided with a plurality of connecting holes 25. Specifically, the first support portion 21 is provided with a plurality of connecting holes 25. Each of the connecting holes 25 extends along the Z-axis direction and has an opening on the first support surface 211. For example, the number of the connecting holes 25 is thirteen. The thirteen connecting holes 25 are respectively a first connecting hole 25a, a second connecting hole 25b, a third connecting hole 25c, a fourth connecting hole 25d, a fifth connecting hole 25e, a sixth connecting hole 25f, a seventh connecting hole 25g, an eighth connecting hole 25h, a ninth connecting hole 25i, a tenth connecting hole 25j, an eleventh connecting hole 25k, a twelfth connecting hole 25l, and a thirteenth connecting hole 25m.

[0131] In the X-axis direction, the twelfth connecting hole 25l, the first connecting hole 25a, the second connecting hole 25b, the fourth connecting hole 25d, the fifth connecting hole 25e, the eighth connecting hole 25h, and the ninth connecting hole 25i are located on one side of the accommodation portion 24. In the Y-axis direction, the twelfth connecting hole 25l, the first connecting hole 25a, the second connecting hole 25b, the fourth connecting hole 25d, the fifth connecting hole 25e, the eighth connecting hole 25h, and the ninth connecting hole 25i are arranged in a straight line in sequence and are spaced apart from each other. In the Y-axis direction, the thirteenth connecting hole 25m is located at one end of the accommodation portion 24 and is spaced apart from the accommodation portion 24. In the X-axis direction, the thirteenth connecting hole 25m is arranged in a straight line with the twelfth connecting hole 25l and is spaced apart from the twelfth connecting hole 25l. In the Y-axis direction, the third connecting hole 25c is located between the accommodation portion 24 and the thirteenth connecting hole 25m, is spaced apart from the accommodation portion 24 and the thirteenth connecting hole 25m, and is arranged in a straight line with the thirteenth connecting hole 25m. In the X-axis direction, the third connecting hole 25c is located on the side of the first connecting hole 25a facing the thirteenth connecting hole 25m, is arranged in a straight line with the first connecting hole 25a, and is spaced apart from the first connecting hole 25a.

[0132] In the X-axis direction, the sixth connecting hole 25f is located between the fourth connecting hole 25d and the receiving portion 24, and is spaced apart from the fourth connecting hole 25d and the receiving portion 24, and the sixth connecting hole 25f and the fourth connecting hole 25d are arranged in a straight line. In the X-axis direction, the seventh connecting hole 25g is located between the fifth connecting hole 25e and the receiving portion 24, and is spaced apart from the fifth connecting hole 25e and the receiving portion 24, and the seventh connecting hole 25g and the fifth connecting hole 25e are arranged in a straight line. In the Y-axis direction, the seventh connecting hole 25g and the sixth connecting hole 25f are arranged in a straight line and are spaced apart. In the X-axis direction, the tenth connecting hole 25j is located between the eighth connecting hole 25h and the receiving portion 24, and is spaced apart from the eighth connecting hole 25h and the receiving portion 24, and the tenth connecting hole 25j and the eighth connecting hole 25h are arranged in a straight line. In the Y-axis direction, the tenth connecting hole 25j and the seventh connecting hole 25g are arranged in a straight line and are spaced apart. In the X-axis direction, the eleventh connecting hole 25k is located between the ninth connecting hole 25i and the receiving part 24, and is spaced apart from the ninth connecting hole 25i and the receiving part 24, and the eleventh connecting hole 25k and the ninth connecting hole 25i are arranged in a straight line. In the Y-axis direction, the eleventh connecting hole 25k and the tenth connecting hole 25j are arranged in a straight line and are spaced apart.

[0133] Please see Figure 10 and Figure 11 and combined Figure 9 , Figure 10 yes Figure 9 The first support member 20 shown is a cross-sectional view along line L1-L1. Figure 11 yes Figure 10 An enlarged view of part A of the first support member 20 shown.

[0134] In some embodiments, a first conductive layer 26 is provided inside the first support portion 21. Specifically, the first conductive layer 26 is embedded inside the first support portion 21. Exemplarily, the projection of the first conductive layer 26 in the Z-axis direction is rectangular. In other embodiments, the projection of the first conductive layer 26 in the Z-axis direction may also be circular, trapezoidal, or triangular, etc., and this application does not specifically limit this. In the Z-axis direction, the projections of the first connecting hole 25a, the second connecting hole 25b, and the third connecting hole 25c are all located inside the projection of the first conductive layer 26, and the projections of the other connecting holes 25 are all located outside the projection of the first conductive layer 26. In the Z-axis direction, the first conductive layer 26 is located between the first connecting hole 25a, the second connecting hole 25b, and the third connecting hole 25c and the second support surface 212. The first conductive layer 26 is arranged parallel to and spaced apart from the second support surface 212. The first conductive layer 26 is partially exposed outside the first support portion 21 through the first connecting hole 25a, the second connecting hole 25b, and the third connecting hole 25c.

[0135] In some embodiments, a second conductive layer 27 is provided on the exterior of the first support portion 21. In the Z-axis direction, the projection of the first conductive layer 26 lies within the projection of the second conductive layer 27. Specifically, the second conductive layer 27 is located on the side of the second support surface 212 facing away from the first conductive layer 26 and is connected to the first support portion 21. The second conductive layer 27 is stacked on the second support surface 212 of the first support portion 21. Exemplarily, in the Z-axis direction, the projection of the second conductive layer 27 is rectangular. In other embodiments, in the Z-axis direction, the projection of the second conductive layer 27 may also be circular, trapezoidal, or triangular, etc., and this application does not specifically limit this. The second conductive layer 27 is arranged parallel to the first conductive layer 26. In the Z-axis direction, the projected area of ​​the second conductive layer 27 is equal to the projected area of ​​the first conductive layer 26, and the projections of the second conductive layer 27 and the first conductive layer 26 completely overlap. In some other embodiments, the projected area of ​​the second conductive layer 27 in the Z-axis direction may also be larger than the projected area of ​​the first conductive layer 26, with the entire projection of the first conductive layer 26 located inside the projection of the second conductive layer 27.

[0136] Please see Figure 12 , Figure 13 , Figure 13a and Figure 13b and combined Figure 7 , Figure 12 yes Figure 9 The first support member 20 shown is a partial cross-sectional view along line L2-L2. Figure 13 yes Figure 8 A partial sectional view of the first support member 20 along line L3-L3. Figure 13a yes Figure 13 An enlarged view of part B of the first support member 20 shown. Figure 13b yes Figure 13 An enlarged view of part C of the first support member 20 shown.

[0137] like Figure 7 , Figure 12 and Figure 13 As shown, in some embodiments, a third conductive layer 28 is provided inside the receiving portion 24, and the third conductive layer 28 is disposed around the receiving hole 247. Specifically, the third conductive layer 28 includes a first portion 281, a second portion 282, a third portion 283, and a fourth portion 284. In the Z-axis direction, the first portion 281 and the second portion 282 are opposite to each other and spaced apart. The first portion 281 and the second portion 282 are parallel to each other. In the X-axis direction, the third portion 283 and the fourth portion 284 are opposite to each other and spaced apart. The third portion 283 and the fourth portion 284 are parallel to each other. The third portion 283 and the fourth portion 284 are both connected between the first portion 281 and the second portion 282, and are both perpendicular to the first portion 281 and the second portion 282.

[0138] The first portion 281 is located between the first support wall surface 241 and the first hole wall 2471, is spaced apart from the first support wall surface 241 and the first hole wall 2471, and is arranged parallel to the first support wall surface 241 and the first hole wall 2471. The second portion 282 is located between the second support wall surface 242 and the second hole wall 2472, is spaced apart from the second support wall surface 242 and the second hole wall 2472, and is arranged parallel to the second support wall surface 242 and the second hole wall 2472. The third portion 283 is located between the third support wall surface 243 and the third hole wall 2473, is spaced apart from the third support wall surface 243 and the third hole wall 2473, and is arranged parallel to the third support wall surface 243 and the third hole wall 2473. The fourth portion 284 is located between the fourth support wall surface 244 and the fourth hole wall 2474, is spaced apart from the fourth support wall surface 244 and the fourth hole wall 2474, and is arranged parallel to the fourth support wall surface 244 and the fourth hole wall 2474. The third conductive layer 28 is embedded in the inside of the accommodation portion 24, is arranged around the accommodation hole 247, and is spaced apart from the accommodation hole 247.

[0139] As Figure 12 , Figure 13a and Figure 13b , in the Y-axis direction, one end surface of the first portion 281, one end surface of the second portion 282, one end surface of the third portion 283, and one end surface of the fourth portion 284 are flush, and the other end surface of the first portion 281, the other end surface of the second portion 282, the other end surface of the third portion 283, and the other end surface of the fourth portion 284 are flush. It can be understood that the third conductive layer 28 includes a first end surface 285 and a second end surface 286. In the Y-axis direction, the first end surface 285 is arranged opposite to the second end surface 286. Among them, the first end surface 285 of the third conductive layer 28 is flush with the first support end surface 245 of the accommodation portion 24. The second end surface 286 of the third conductive layer 28 is flush with the second support end surface 246 of the accommodation portion 24. In other embodiments, the first end surface 285 and the first support end surface 245 can also not be flush. The second end surface 286 of the third conductive layer 28 and the second support end surface 246 of the accommodation portion 24 can also not be flush.

[0140] In some embodiments, the accommodation portion 24 is provided with a matching hole 248, which is located between the accommodation hole 247 and the third conductive layer 28, and is in communication with the accommodation hole 247. The third conductive layer 28 is partially exposed outside the accommodation portion 24 through the matching hole 248. Specifically, the matching hole 248 is located between the accommodation hole 247 and the first portion 281 of the third conductive layer 28, the matching hole 248 extends along the Z-axis direction, one end of the matching hole 248 is connected to the first portion 281, and the other end of the matching hole 248 is in communication with the accommodation hole 247. The first portion 281 of the third conductive layer 28 is partially exposed outside the accommodation portion 24 through the matching hole 248.

[0141] As Figure 7 , Figure 12 and Figure 13 shown, in some embodiments, the outer surface of the accommodation portion 24 is provided with a fourth conductive layer 29, the fourth conductive layer 29 is arranged around the accommodation portion 24, and the fourth conductive layer 29 covers at least part of the accommodation portion 24. Among them, the fourth conductive layer 29 covers at least part of the third conductive layer 28. It should be noted that the feature A covers the feature B means that in the X-axis direction, the projection of the feature B completely overlaps the projection of the feature A; and in the Z-axis direction, the projection of the feature B completely overlaps the projection of the feature A.

[0142] Specifically, the fourth conductive layer 29 includes a first branch 291, a second branch 292, a third branch 293, and a fourth branch 294. In the Z-axis direction, the first branch 291 and the second branch 292 are oppositely and spacedly arranged. The first branch 291 and the second branch 292 are arranged in parallel. In the X-axis direction, the third branch 293 and the fourth branch 294 are oppositely and spacedly arranged. The third branch 293 and the fourth branch 294 are arranged in parallel. The third branch 293 and the fourth branch 294 are both connected between the first branch 291 and the second branch 292, and are both arranged perpendicularly to the first branch 291 and the second branch 292.

[0143] The first branch 291 is located on the side of the first support wall surface 241 away from the first portion 281, and is connected with the accommodation portion 24. The first branch 291 is laminated on the first support wall surface 241. The second branch 292 is located on the side of the second support wall surface 242 away from the second portion 282, and is connected with the accommodation portion 24. The second branch 292 is laminated on the second support wall surface 242. The third branch 293 is located on the side of the third support wall surface 243 away from the third portion 283, and is connected with the accommodation portion 24. The third branch 293 is laminated on the third support wall surface 243. The fourth branch 294 is located on the side of the fourth support wall surface 244 away from the fourth portion 284, and is connected with the accommodation portion 24. The fourth branch 294 is laminated on the fourth support wall surface 244.

[0144] Among them, in the X-axis direction, the width dimension of the first branch 291 is greater than the width dimension of the first support wall surface 241, and the width dimension of the second branch 292 is greater than the width dimension of the second support wall surface 242. In the Z-axis direction, the width dimension of the third branch 293 is greater than the width dimension of the third support wall surface 243. In the Z-axis direction, the width dimension of the fourth branch 294 is greater than the width dimension of the fourth support wall surface 244.

[0145] As Figure 12 , Figure 13a and Figure 13bIn the Y-axis direction, one end surface of the first branch 291, one end surface of the second branch 292, one end surface of the third branch 293, and one end surface of the fourth branch 294 are flush with each other, and the other end surface of the first branch 291, the other end surface of the second branch 292, the other end surface of the third branch 293, and the other end surface of the fourth branch 294 are flush with each other. It can be understood that the fourth conductive layer 29 comprises a third end surface 295 and a mating end surface 296. In the Y-axis direction, the third end surface 295 is disposed opposite to the mating end surface 296. The third end surface 295 of the fourth conductive layer 29 is flush with the first support end surface 245 of the accommodation portion 24. The mating end surface 296 of the fourth conductive layer 29 is flush with the second support end surface 246 of the accommodation portion 24. In other words, in the Y-axis direction, the length dimension of the first branch 291 is equal to the length dimension of the first support wall surface 241, the length dimension of the second branch 292 is equal to the length dimension of the second support wall surface 242, the length dimension of the third branch 293 is equal to the length dimension of the third support wall surface 243, and the length dimension of the fourth branch 294 is equal to the length dimension of the fourth support wall surface 244. The first branch 291 completely covers the first support wall surface 241, the second branch 292 completely covers the second support wall surface 242, the third branch 293 completely covers the third support wall surface 243, and the fourth branch 294 completely covers the fourth support wall surface 244. The fourth conductive layer 29 covers the entire accommodation portion 24.

[0146] In some other embodiments, the third end surface 295 can not be flush with the first support end surface 245, and the mating end surface 296 of the fourth conductive layer 29 can not be flush with the second support end surface 246 of the accommodation portion 24. The fourth conductive layer 29 can also only cover part of the accommodation portion 24.

[0147] It can be understood that the third end surface 295 of the fourth conductive layer 29 is flush with the first end surface 285 of the third conductive layer 28. The mating end surface 296 of the fourth conductive layer 29 is flush with the second end surface 286 of the third conductive layer 28. In some other embodiments, the third end surface 295 of the fourth conductive layer 29 can not be flush with the first end surface 285 of the third conductive layer 28. The mating end surface 296 of the fourth conductive layer 29 can not be flush with the second end surface 286 of the third conductive layer 28.

[0148] As Figure 12 and Figure 13As shown, in the Z-axis direction, the projection area of the first branch 291 is greater than that of the first portion 281, and the projection of the first portion 281 is entirely located in the projection of the first branch 291. In the Z-axis direction, the projection area of the second branch 292 is greater than that of the second portion 282, and the projection of the second portion 282 is entirely located in the projection of the second branch 292. In the X-axis direction, the projection area of the third branch 293 is greater than that of the third portion 283, and the projection of the third portion 283 is entirely located in the projection of the third branch 293. In other words, the fourth conductive layer 29 covers the entire third conductive layer 28. In some other embodiments, the fourth conductive layer 29 can also cover only part of the third conductive layer 28, which is not limited in the present application.

[0149] Please refer to Figure 14 , Figure 14a and Figure 14b , and combine with Figure 5 , Figure 14 is Figure 5 the first housing 10 of the first sub-module 1 and the first support 20 after assembly. The perspective structure diagram is shown. Figure 14a is Figure 14 the first housing 10 and the first support 20 along the L4-L4 line. The partial cross-sectional view is shown. Figure 14b is Figure 14 the first housing 10 and the first support 20 along the L5-L5 line. The partial cross-sectional view is shown.

[0150] As shown in Figure 5 and Figure 14 , the first support 20 is fixedly connected with the first housing 10. Specifically, by means including but not limited to welding or gluing, the first support 20 is accommodated in the first mounting groove 14 of the first housing 10. The second support surface 212 of the first support portion 21 of the first support 20 is opposite to and fixedly connected with the first surface 111 of the first connecting portion 11 of the first housing 10. The first support surface 211 of the first support portion 21 faces away from the first surface 111. The first support portion 21 is fixedly laminated on the first connecting portion 11. It can be understood that the first support portion 21 is laminated with the first housing 10.

[0151] The second wall surface 222 of the second support part 22 is opposite to and fixedly connected with the second surface 121 of the second connecting part 12. The first wall surface 221 of the second support part 22 faces away from the second surface 121. The third wall surface 223 of the second support part 22 is flush with the third surface 122 of the second connecting part 12. The second support part 22 is fixedly laminated on the second connecting part 12. The fifth wall surface 232 of the third support part 23 is opposite to and fixedly connected with the fourth surface 131 of the third connecting part 13. The fourth wall surface 231 of the third support part 23 faces away from the fourth surface 131. The sixth wall surface 233 of the third support part 23 is flush with the fifth surface 132 of the third connecting part 13. The third support part 23 is fixedly laminated on the third connecting part 13. The fourth support wall surface 244 of the accommodating part 24 is opposite to and connected with the fourth surface 131 of the third connecting part 13. The third support wall surface 243 of the accommodating part 24 faces away from the fourth surface 131. The second support wall surface 242 of the accommodating part 24 is opposite to and connected with the first surface 111 of the first connecting part 11. The first support wall surface 241 of the accommodating part 24 faces away from the first surface 111. The accommodating part 24 is fixedly connected with the first connecting part 11 and the third connecting part 13.

[0152] As shown in Figure 14 and Figure 14a , the second conductive layer 27 is located between the second support surface 212 and the first surface 111 and connected with the second support surface 212 and the first surface 111. The second conductive layer 27 is connected between the first support part 21 and the first connecting part 11. The second conductive layer 27 is located between the first support part 21 and the first shell 10. The second conductive layer 27 is electrically connected with the first shell 10, and the second conductive layer 27 is grounded through the first shell 10, i.e., the second conductive layer 27 is connected to the PE potential.

[0153] It should be noted that there is a gap between the first support part 21 and the first connecting part 11, the second support part 22 and the second connecting part 12, and the third support part 23 and the third connecting part 13, which can be used to accommodate solder or various adhesives, which are not limited in the present application.

[0154] As shown in Figure 14 and Figure 14b , the second branch 292 of the fourth conductive layer 29 is located between the second support wall surface 242 and the first surface 111 and connected with the second support wall surface 242 and the first surface 111. The fourth branch 294 of the fourth conductive layer 29 is located between the fourth support wall surface 244 and the fourth surface 131 and connected with the fourth support wall surface 244 and the fourth surface 131. The fourth conductive layer 29 is partially connected between the accommodating part 24 and the first shell 10. The fourth conductive layer 29 is electrically connected with the first shell 10. Since the fourth conductive layer 29 is electrically connected with the first shell 10, the fourth conductive layer 29 is grounded through the first shell 10, and the fourth conductive layer 29 is connected to the PE potential.

[0155] Please refer to Figure 15 , Figure 16 and Figure 16a , in combination with Figure 1 , Figure 15 is a perspective structural schematic view of the input module 30 of the first sub-module 1 shown in Figure 5 . Figure 16 is a perspective structural exploded schematic view of the input module 30 shown in Figure 15 . Figure 16a is a perspective structural exploded schematic view of the input module 30 shown in Figure 15 from another angle.

[0156] As shown in Figure 15 , Figure 16 and Figure 16a , in some embodiments, the input module 30 includes a connecting piece 31, an input terminal 32 and an input fuse 33. In the Y-axis direction, the input terminal 32 is located on one side of the connecting piece 31 and connected with the connecting piece 31; and the input fuse 33 is located on the other side of the connecting piece 31 and connected with the connecting piece 31.

[0157] For example, the connecting piece 31 is made of copper. In other embodiments, the connecting piece 31 can also be made of other metal materials such as iron, aluminum or other conductive materials, which are not limited in the present application. In some embodiments, the connecting piece 31 is a rectangular block. The connecting piece 31 includes a first limiting surface 311, a second limiting surface 312, a third limiting surface 313, a fourth limiting surface 314, a fifth limiting surface 315 and a sixth limiting surface 316. In the Z-axis direction, the first limiting surface 311 and the second limiting surface 312 are oppositely arranged and parallelly arranged. In the X-axis direction, the third limiting surface 313 and the fourth limiting surface 314 are oppositely arranged and parallelly arranged. The third limiting surface 313 and the fourth limiting surface 314 are connected between the first limiting surface 311 and the second limiting surface 312 and perpendicularly arranged with the first limiting surface 311 and the second limiting surface 312. In the Y-axis direction, the fifth limiting surface 315 and the sixth limiting surface 316 are oppositely arranged and parallelly arranged. The fifth limiting surface 315 and the sixth limiting surface 316 are connected between the first limiting surface 311 and the second limiting surface 312 and between the third limiting surface 313 and the fourth limiting surface 314. The fifth limiting surface 315 and the sixth limiting surface 316 are perpendicularly arranged with the first limiting surface 311, the second limiting surface 312, the third limiting surface 313 and the fourth limiting surface 314.

[0158] In some embodiments, the connecting piece 31 is provided with a first fixing groove 317. The first fixing groove 317 is recessed in the fifth limiting face 315. The first fixing groove 317 extends along the Y-axis direction. The first fixing groove 317 has two openings, one of which is located in the fifth limiting face 315, and the other of which is located in the second limiting face 312. The first fixing groove 317 includes a first groove wall 3171, a second groove wall 3172, a third groove wall 3173, and a fourth groove wall 3174. In the X-axis direction, the first groove wall 3171 and the second groove wall 3172 are oppositely arranged and parallelly arranged. The third groove wall 3173 is connected between the first groove wall 3171 and the second groove wall 3172 and is perpendicularly arranged with the first groove wall 3171 and the second groove wall 3172. The fourth groove wall 3174 is connected between the first groove wall 3171 and the second groove wall 3172 and is connected with the third groove wall 3173. The fourth groove wall 3174 is perpendicularly arranged with the first groove wall 3171, the second groove wall 3172, and the third groove wall 3173.

[0159] In some embodiments, the connecting piece 31 is provided with a second fixing groove 318. The second fixing groove 318 is recessed in the sixth limiting face 316. The second fixing groove 318 extends along the Y-axis direction. The second fixing groove 318 has two openings, one of which is located in the sixth limiting face 316, and the other of which is located in the second limiting face 312. The second fixing groove 318 includes a fifth groove wall 3181, a sixth groove wall 3182, a seventh groove wall 3183, and an eighth groove wall 3184. In the X-axis direction, the fifth groove wall 3181 and the sixth groove wall 3182 are oppositely arranged and parallelly arranged. The seventh groove wall 3183 is connected between the fifth groove wall 3181 and the sixth groove wall 3182 and is perpendicularly arranged with the fifth groove wall 3181 and the sixth groove wall 3182. The eighth groove wall 3184 is connected between the fifth groove wall 3181 and the sixth groove wall 3182 and is connected with the seventh groove wall 3183. The eighth groove wall 3184 is perpendicularly arranged with the fifth groove wall 3181, the sixth groove wall 3182, and the seventh groove wall 3183.

[0160] In some embodiments, the input terminal 32 is a rectangular block. The input terminal 32 includes a first mounting surface 321, a second mounting surface 322, a third mounting surface 323, a fourth mounting surface 324, a fifth mounting surface 325, and a sixth mounting surface 326. In the Z-axis direction, the first mounting surface 321 is disposed opposite the second mounting surface 322 and is disposed parallel to the second mounting surface 322. In the X-axis direction, the third mounting surface 323 is disposed opposite the fourth mounting surface 324 and is disposed parallel to the fourth mounting surface 324. The third mounting surface 323 and the fourth mounting surface 324 are connected between the first mounting surface 321 and the second mounting surface 322 and are disposed perpendicular to the first mounting surface 321 and the second mounting surface 322. In the Y-axis direction, the fifth mounting surface 325 is disposed opposite the sixth mounting surface 326 and is disposed parallel to the sixth mounting surface 326. The fifth mounting surface 325 and the sixth mounting surface 326 are connected between the first mounting surface 321 and the second mounting surface 322 and are connected between the third mounting surface 323 and the fourth mounting surface 324. The fifth mounting surface 325 and the sixth mounting surface 326 are disposed perpendicular to the first mounting surface 321, the second mounting surface 322, the third mounting surface 323, and the fourth mounting surface 324.

[0161] The first mounting surface 321 of the input terminal 32 is connected to the third slot wall 3173 of the first fixed slot 317 by means including but not limited to gluing and welding. The second mounting surface 322 of the input terminal 32 is disposed opposite the third slot wall 3173 and is flush with the second limiting surface 312 of the connecting piece 31. The third mounting surface 323 of the input terminal 32 is connected to the first slot wall 3171 of the first fixed slot 317. The fourth mounting surface 324 of the input terminal 32 is connected to the second slot wall 3172 of the first fixed slot 317. The sixth mounting surface 326 of the input terminal 32 is connected to the fourth slot wall 3174 of the first fixed slot 317. The fifth mounting surface 325 of the input terminal 32 is disposed opposite the fourth slot wall 3174. One end of the input terminal 32 is inserted into the first fixed slot 317, and the input terminal 32 is connected to the connecting piece 31.

[0162] In some embodiments, the input fuse 33 is a rectangular block. The input fuse 33 includes a first fixing surface 331, a second fixing surface 332, a third fixing surface 333, a fourth fixing surface 334, a fifth fixing surface 335, and a sixth fixing surface 336. In the Z-axis direction, the first fixing surface 331 and the second fixing surface 332 are arranged opposite to each other and parallel to each other. In the X-axis direction, the third fixing surface 333 and the fourth fixing surface 334 are arranged opposite to each other and parallel to each other. The third fixing surface 333 and the fourth fixing surface 334 are connected between the first fixing surface 331 and the second fixing surface 332, and are perpendicular to the first fixing surface 331 and the second fixing surface 332. In the Y-axis direction, the fifth fixing surface 335 and the sixth fixing surface 336 are arranged opposite to each other and parallel to each other. The fifth fixing surface 335 and the sixth fixing surface 336 are connected between the first fixing surface 331 and the second fixing surface 332, and between the third fixing surface 333 and the fourth fixing surface 334. The fifth fixing surface 335 and the sixth fixing surface 336 are perpendicular to the first fixing surface 331, the second fixing surface 332, the third fixing surface 333 and the fourth fixing surface 334.

[0163] The first fixing surface 331 of the input fuse 33 is opposite to and connected to the seventh groove wall 3183 of the second fixing groove 318 through methods including but not limited to adhesive bonding and welding. The second fixing surface 332 of the input fuse 33 faces away from the seventh groove wall 3183 and is flush with the second limiting surface 312 of the connector 31. The third fixing surface 333 of the input fuse 33 is opposite to and connected to the sixth groove wall 3182 of the second fixing groove 318. The fourth fixing surface 334 of the input fuse 33 is opposite to and connected to the fifth groove wall 3181 of the second fixing groove 318. The fifth fixing surface 335 of the input fuse 33 is opposite to and connected to the eighth groove wall 3184 of the second fixing groove 318. The sixth fixing surface 336 of the input fuse 33 faces away from the eighth groove wall 3178. One end of the input fuse 33 is inserted into the second fixing groove 318. The input fuse 33 is connected to the connector 31, and the input terminal 32 is fixedly connected to and electrically connected to the input fuse 33 through the connector 31.

[0164] like Figure 1 and Figure 14 As shown, input terminal 32 is used for electrical connection with output terminal 201 of AC power supply 200. Input module 30 receives output AC power from output terminal 201 of AC power supply 200 through input terminal 32. Output AC power is transmitted from input terminal 32 to input fuse 33 via connector 31. Input fuse 33 is used for circuit protection. For example, when a short circuit occurs in power module 102 and transformer 100, input fuse 33 can block the transmission of output AC power, thereby preventing damage to power module 102 and transformer 100 and improving the operational safety of power module 102 and transformer 100.

[0165] Please see Figure 17 , Figure 18 , Figure 19 and combined Figure 15 , Figure 17 yes Figure 5 The diagram shows a three-dimensional structure of the first sub-module 1 after the first housing 10, the first support member 20, and the input module 30 are assembled. Figure 18 yes Figure 17 The diagram shows the structure of the first housing 10, the first support member 20, and the input module 30 from another angle. Figure 19 yes Figure 18 The first housing 10, the first support member 20, and the input module 30 shown are partially cross-sectional views along line L6-L6.

[0166] like Figure 15 , Figure 17 and Figure 18 As shown, the input module 30 is inserted into the receiving hole 247 of the receiving portion 24, and the input module 30 is at least partially received in the receiving hole 247. Specifically, the first limiting surface 311 of the connector 31 is opposite to and connected to the first hole wall 2471 of the receiving hole 247. The second limiting surface 312 of the connector 31 is opposite to and connected to the second hole wall 2472 of the receiving hole 247. The third limiting surface 313 of the connector 31 is opposite to and connected to the third hole wall 2473 of the receiving hole 247. The fourth limiting surface 314 of the connector 31 is opposite to and connected to the fourth hole wall 2474 of the receiving hole 247. The fifth limiting surface 315 of the connector 31 is located between the first support end face 245 and the second support end face 246 of the receiving portion 24, and is spaced apart from the first support end face 245 and the second support end face 246. The sixth limiting surface 316 of the connector 31 is located between the fifth limiting surface 315 and the second support end surface 246, and is spaced apart from both the fifth limiting surface 315 and the second support end surface 246. The connector 31 of the input module 30 is fixedly connected to the receiving hole 247 of the receiving portion 24 by means including but not limited to adhesive bonding or welding. The connector 31 is located approximately at the center of the receiving hole 247. In some other embodiments, the connector 31 and the receiving portion 24 can also be integrally formed, which is beneficial for improving overall strength.

[0167] The first mounting surface 321 of the input terminal 32 is opposite to and spaced apart from the first hole wall 2471 of the accommodation hole 247. The second mounting surface 322 of the input terminal 32 is opposite to and in contact with the second hole wall 2472 of the accommodation hole 247. The third mounting surface 323 of the input terminal 32 is opposite to and spaced apart from the third hole wall 2473 of the accommodation hole 247. The fourth mounting surface 324 of the input terminal 32 is opposite to and spaced apart from the fourth hole wall 2474 of the accommodation hole 247. The fifth mounting surface 325 of the input terminal 32 is flush with the first support end surface 245 of the accommodation portion 24. The input terminal 32 is completely accommodated in the accommodation hole 247 through the connecting piece 31.

[0168] The first fixing surface 331 of the input fuse 33 is opposite to and spaced apart from the first hole wall 2471 of the accommodation hole 247. The second fixing surface 332 of the input terminal 32 is opposite to and in contact with the second hole wall 2472 of the accommodation hole 247. The third fixing surface 333 of the input fuse 33 is opposite to and spaced apart from the third hole wall 2473 of the accommodation hole 247. The fourth fixing surface 334 of the input fuse 33 is opposite to and spaced apart from the fourth hole wall 2474 of the accommodation hole 247. The fifth fixing surface 335 of the input fuse 33 is located on the side of the second support end surface 246 of the accommodation portion 24 away from the first support end surface 245 and is spaced apart from the second support end surface 246. The input fuse 33 is partially accommodated in the accommodation hole 247 and partially exposed outside the accommodation hole 247 through the connecting piece 31. Among them, in the Y-axis direction, the second support end surface 246 is located on the side of the third connecting hole 25c away from the thirteenth connecting hole 25m and is spaced apart from the third connecting hole 25c. In some other embodiments, the input fuse 33 can also be completely accommodated in the accommodation hole 247.

[0169] It should be noted that in the present embodiment, when the input module 30 is worn in the accommodation hole 247 of the accommodation portion 24, the connecting piece 31 is first fixedly connected in the accommodation hole 247; the input terminal 32 is inserted into the accommodation hole 247 along the positive direction of the Y-axis from an opening of the accommodation hole 247 and is connected with the connecting piece 31; and the input fuse 33 is inserted into the accommodation hole 247 along the negative direction of the Y-axis from another opening of the accommodation hole 247 and is connected with the connecting piece 31.

[0170] As Figure 18 and Figure 19As shown, the input terminal 32 and the input fuse 33 are electrically connected with the third conductive layer 28 by means including but not limited to wires. Specifically, the number of wires is two, and the two wires are a first wire and a second wire. One end of the first wire is connected with the input terminal 32, the first wire passes through the matching hole 248 from the receiving hole 247, and the other end of the first wire is connected with the first part 281 of the third conductive layer 28. Through the first wire, the input terminal 32 is electrically connected with the third conductive layer 28. One end of the second wire is connected with the input fuse 33, the second wire passes through the matching hole 248 from the receiving hole 247, and the other end of the second wire is connected with the first part 281 of the third conductive layer 28. Through the second wire, the input terminal 32 is electrically connected with the third conductive layer 28. It can be understood that the third conductive layer 28 is electrically connected with the input module 30.

[0171] It can be understood that since the input terminal 32, the connecting piece 31 and the input fuse 33 transmit output alternating current (specifically, medium-voltage alternating current), the third conductive layer 28 is connected to a medium-voltage potential. In other words, since the input module 30 is electrically connected with the third conductive layer 28, the third conductive layer 28 is connected to a medium-voltage potential. And as described above, the fourth conductive layer 29 is connected to a PE potential. In this way, through the third conductive layer 28 and the fourth conductive layer 29, the insulation of the input module 30 on the ground side received in the receiving hole 247 is equivalent to pure solid insulation, and the electric field is entirely on the receiving part 24, and the air around the receiving part 24 does not bear the electric field. In this way, not only is the insulation effect strong, and the insulation requirement of the input module 30 on the ground side is realized, but also since the volume of the receiving part 24 can be designed to be very small, it is further beneficial to reduce the volume of the first sub-module 1, and it is beneficial to the miniaturization design of the first sub-module 1 and the power module 102, and it is further beneficial to the miniaturization design of the transformer 100.

[0172] Please refer to Figure 20 , Figure 21 , Figure 22 , Figure 23 , Figure 23a and Figure 24 , and in combination with Figure 5 and Figure 18 , Figure 20 is a perspective structural schematic view of the first receiving sub-module 41 and the first heat dissipation sub-module 45 of the first power module 40 of the first sub-module 1 shown in Figure 5 . Figure 21 is an enlarged view of the D part of the first power module 40 shown in Figure 20 . Figure 22 is a structural schematic view of the first power module 40 from another angle shown in Figure 20 . Figure 23 is a structural schematic view of the first sub-module 1 after assembly from another angle shown in Figure 5 . Figure 23a is Figure 23 A structural block diagram of the first power module 40 of the first sub-module 1 shown in cooperation with the input module 30. Figure 24 Figure 23 A partial sectional view of the first sub-module 1 shown along the line L7-L7.

[0173] As shown in Figure 5 , Figure 18 and Figure 20 In some embodiments, the first power module 40 includes a first receiving sub-module 41, a first conversion sub-module 42, a first rectifying sub-module 43, a first output terminal 44, and a first heat dissipation sub-module 45. In the Y-axis direction, the first conversion sub-module 42 is located on one side of the first receiving sub-module 41 and is spaced apart from the first receiving sub-module 41, and is electrically connected to the first receiving sub-module 41. In the Y-axis direction, the first rectifying sub-module 43 is located on the side of the first conversion sub-module 42 away from the first receiving sub-module 41, and is spaced apart from the first conversion sub-module 42, and is electrically connected to the first conversion sub-module 42. It can be understood that the first receiving sub-module 41, the first conversion sub-module 42, and the first rectifying sub-module 43 are arranged in sequence and are electrically connected in sequence. In the Y-axis direction, the first output terminal 44 is located on the side of the first rectifying sub-module 43 away from the first conversion sub-module 42, and is connected to the first rectifying sub-module 43. In the Y-axis direction, the first heat dissipation sub-module 45 is located on the side of the first receiving sub-module 41 away from the first conversion sub-module 42, and is spaced apart from the first receiving sub-module 41, and is electrically connected to the first rectifying sub-module 43.

[0174] For example, the first receiving sub-module 41 is a rectangular plate body. The first receiving sub-module 41 includes a first connecting surface 411, a second connecting surface 412, a third connecting surface 413, a fourth connecting surface 414, a fifth connecting surface 415, and a sixth connecting surface 416. In the Z-axis direction, the first connecting surface 411 is arranged opposite to the second connecting surface 412 and is arranged in parallel. In the X-axis direction, the third connecting surface 413 is arranged opposite to the fourth connecting surface 414 and is arranged in parallel. The third connecting surface 413 and the fourth connecting surface 414 are connected between the first connecting surface 411 and the second connecting surface 412, and are arranged perpendicular to the first connecting surface 411 and the second connecting surface 412. In the Y-axis direction, the fifth connecting surface 415 is arranged opposite to the sixth connecting surface 416 and is arranged in parallel. The fifth connecting surface 415 and the sixth connecting surface 416 are connected between the first connecting surface 411 and the second connecting surface 412, and are connected between the third connecting surface 413 and the fourth connecting surface 414. The fifth connecting surface 415 and the sixth connecting surface 416 are arranged perpendicular to the first connecting surface 411, the second connecting surface 412, the third connecting surface 413, and the fourth connecting surface 414.

[0175] ​The first receiving submodule 41 includes a first rectifier unit 417 and a first inverter unit 417a. In the X-axis direction, the first inverter unit 417a is located to one side of the first rectifier unit 417 and is connected to it. The first rectifier unit 417 includes a portion of a first connecting surface 411, a portion of a second connecting surface 412, a fourth connecting surface 414, a portion of a fifth connecting surface 415, and a portion of a sixth connecting surface 416. The first inverter unit 417a includes another portion of a first connecting surface 411, another portion of a second connecting surface 412, a third connecting surface 413, another portion of a fifth connecting surface 415, and another portion of a sixth connecting surface 416.

[0176] In some embodiments, the first receiving submodule 41 is provided with a plurality of mating connection holes 418. Each mating connection hole 418 extends along the Z-axis direction and has two openings. One opening is located on the first connecting surface 411, and the other opening is located on the second connecting surface 412. For example, the number of mating connection holes 418 is three. The three mating connection holes 418 are respectively a first mating connection hole 418a, a second mating connection hole 418b, and a third mating connection hole 418c. The first mating connection hole 418a and the second mating connection hole 418b are provided in the first inverter unit 417a. The third mating connection hole 418c is provided in the first rectifier unit 417. In the Y-axis direction, the second mating connection hole 418b and the first mating connection hole 418a are arranged in a straight line and spaced apart. In the X-axis direction, the third mating connection hole 418c and the first mating connection hole 418a are arranged in a straight line and spaced apart.

[0177] like Figure 21 and Figure 22 As shown, in some embodiments, the first receiving submodule 41 is provided with a mating groove 419. Specifically, the first rectifier unit 417 is provided with a mating groove 419. The mating groove 419 extends along the Y-axis and has two openings. One opening is located on the fifth connecting surface 415 of the first rectifier unit 417, and the other opening is located on the second connecting surface 412 of the first rectifier unit 417. The mating groove 419 includes a first mating groove wall 4191, a second mating groove wall 4192, a third mating groove wall 4193, and a fourth mating groove wall 4194. In the X-axis direction, the first mating groove wall 4191 and the second mating groove wall 4192 are arranged opposite to each other and parallel to each other. The third mating groove wall 4193 is connected between the first mating groove wall 4191 and the second mating groove wall 4192 and is arranged perpendicular to the first mating groove wall 4191 and the second mating groove wall 4192. The fourth mating groove wall 4194 is connected between the first mating groove wall 4191 and the second mating groove wall 4192, and is also connected to the third mating groove wall 4193. The fourth mating groove wall 4194 is connected to the first mating groove wall 4191, the second mating groove wall 4192, and the third mating groove wall 4193.

[0178] As shown in Figure 18 , Figure 20 and Figure 23 , the first receiving sub-module 41 is fixedly connected with the first support 20. The first receiving sub-module 41 is fixedly connected with the first support part 21. Specifically, the second connecting face 412 of the first receiving sub-module 41 is opposite to and in contact with the first support face 211 of the first support part 21. The first connecting face 411 of the first receiving sub-module 41 is away from the first support face 211. The third connecting face 413 of the first receiving sub-module 41 is opposite to and spaced apart from the first wall face 221 of the second support part 22. The fourth connecting face 414 of the first receiving sub-module 41 is opposite to and spaced apart from the fourth wall face 231 of the third support part 23. The first matching connecting hole 418a of the first receiving sub-module 41 matches the first connecting hole 25a of the first support part 21. The second matching connecting hole 418b of the first receiving sub-module 41 matches the second connecting hole 25b of the first support part 21. The third matching connecting hole 418c of the first receiving sub-module 41 matches the third connecting hole 25c of the first support part 21.

[0179] The first receiving sub-module 41 is fixedly connected with the first support part 21 through a plurality of fasteners (screws, pins or screws). For example, the first fastener passes through the first matching connecting hole 418a and the first connecting hole 25a. The second fastener passes through the second matching connecting hole 418b and the second connecting hole 25b. The third fastener passes through the third matching connecting hole 418c and the third connecting hole 25c. Thus, the first receiving sub-module 41 is fixedly connected with the first support part 21. The first receiving sub-module 41 is located at one end of the receiving part 24. It should be noted that in this application, the matching of feature A and feature B means that the projection of feature A overlaps the projection of feature B in the X-Y plane.

[0180] As shown in Figure 21 , Figure 23 and Figure 23aAs shown, the first receiving sub-module 41 is connected with the input module 30. The first receiving sub-module 41 is connected with the input fuse 33 by means including but not limited to welding, gluing, etc. The input fuse 33 is partially inserted into the matching groove 419 of the first receiving sub-module 41. Specifically, the first fixed surface 331 of the input fuse 33 is opposite to and connected with the third matching groove wall 4193 of the matching groove 419. The third fixed surface 333 of the input fuse 33 is opposite to and connected with the second matching groove wall 4192 of the matching groove 419. The fourth fixed surface 334 of the input fuse 33 is opposite to and connected with the first matching groove wall 4191 of the matching groove 419. The sixth fixed surface 336 of the input fuse 33 is opposite to and connected with the fourth matching groove wall 4194 of the matching groove 419. The end of the input fuse 33 away from the connecting member 31 is inserted into the matching groove 419 of the first rectifying unit 417 and is electrically connected with the first rectifying unit 417. The input fuse 33 is electrically connected with the first power module 40. That is, the input module 30 is inserted into the matching groove 419 and is electrically connected with the first rectifying unit 417.

[0181] The output alternating current transmitted from the input terminal 32 of the input module 30 via the connecting member 31 and the input fuse 33 can be transmitted to the first rectifying unit 417. The first rectifying unit 417 is configured to rectify the output alternating current to output first direct current. The first direct current is medium-voltage direct current. The first direct current is transmitted from the first rectifying unit 417 to the first inverting unit 417a. The first inverting unit 417a is configured to invert the first direct current to output first alternating current. Thus, the first receiving sub-module 41 can output the first alternating current. The first alternating current is high-frequency medium-voltage alternating current, and the frequency of the first alternating current is greater than the frequency of the output alternating current.

[0182] In other words, the output alternating current transmitted from the input terminal 32 via the connecting member 31 and the input fuse 33 can be transmitted to the first receiving sub-module 41. The first receiving sub-module 41 is configured to process the output alternating current to output first alternating current. The first alternating current is high-frequency medium-voltage alternating current, and the frequency of the first alternating current is greater than the frequency of the output alternating current.

[0183] As shown in FIG. 4, the first receiving sub-module 41 is connected with the input module 30. Figure 23 and Figure 24 The first fastener passing through the first matching connecting hole 418a and the first connecting hole 25a is in contact with the first conductive layer 26. The second fastener passing through the second matching connecting hole 418b and the second connecting hole 25b is in contact with the first conductive layer 26. The third fastener passing through the third matching connecting hole 418c and the third connecting hole 25c is in contact with the first conductive layer 26. Thus, the first receiving sub-module 41 is electrically connected with the first conductive layer 26 by means of the plurality of fasteners. In other words, the first conductive layer 26 is electrically connected with the first power module 40.

[0184] It can be understood that, since the current transmitted in the first receiving sub-module 41 is medium voltage current (including output alternating current, first direct current and first alternating current), the first receiving sub-module 41 is electrically connected with the first conductive layer 26, and the first conductive layer 26 is connected to a medium voltage potential. In addition, since the second conductive layer 27 is connected to a PE potential. In this way, the first receiving sub-module 41 on the ground side realizes pure solid insulation through the first supporting part 21, and the electric field is entirely on the first supporting part 21, and the air around the first receiving sub-module 41 does not bear the electric field. In this way, not only the insulation effect is strong, and the insulation requirement of the first receiving sub-module 41 on the ground side is realized, but also the thickness dimension (the dimension in the Z-axis direction) of the first supporting part 21 can be designed to be very small, which is conducive to reducing the volume of the first sub-module 1, and is conducive to the miniaturization design of the first sub-module 1 and the power module 102, and further conducive to the miniaturization design of the transformer 100.

[0185] Please refer to Figure 24a , and combine Figure 13b , Figure 18 , Figure 23 and Figure 23a , Figure 24a is Figure 5 the first conversion sub-module 42 of the first power module 40 of the first sub-module 1 as shown in the perspective structural schematic view.

[0186] As shown in Figure 23a and Figure 24a , the first conversion sub-module 42 is a rectangular plate body. The first conversion sub-module 42 includes a first matching connecting surface 421, a second matching connecting surface 422, a third matching connecting surface 423, a fourth matching connecting surface 424, a fifth matching connecting surface 425 and a sixth matching connecting surface 426. In the Z-axis direction, the first matching connecting surface 421 and the second matching connecting surface 422 are oppositely arranged and parallelly arranged. In the X-axis direction, the third matching connecting surface 423 and the fourth matching connecting surface 424 are oppositely arranged and parallelly arranged. The third matching connecting surface 423 and the fourth matching connecting surface 424 are connected between the first matching connecting surface 421 and the second matching connecting surface 422, and are perpendicularly arranged with the first matching connecting surface 421 and the second matching connecting surface 422. In the Y-axis direction, the fifth matching connecting surface 425 and the sixth matching connecting surface 426 are oppositely arranged and parallelly arranged. The fifth matching connecting surface 425 and the sixth matching connecting surface 426 are connected between the first matching connecting surface 421 and the second matching connecting surface 422, and are connected between the third matching connecting surface 423 and the fourth matching connecting surface 424. The fifth matching connecting surface 425 and the sixth matching connecting surface 426 are perpendicularly arranged with the first matching connecting surface 421, the second matching connecting surface 422, the third matching connecting surface 423 and the fourth matching connecting surface 424.

[0187] The first conversion sub-module 42 comprises a first input portion 426a and a first output portion 426b. In the Y-axis direction, the first output portion 426b is located at one side of the first input portion 426a and is connected to the first input portion 426a. The first output portion 426b is coupled to the first input portion 426a. The first output portion 426b and the first input portion 426a have a first transformation boundary 426c therebetween. The first transformation boundary 426c is located between the fifth mating connection surface 425 and the sixth mating connection surface 426 and is arranged in parallel to and spaced apart from the fifth mating connection surface 425 and the sixth mating connection surface 426.

[0188] For example, the first conversion sub-module 42 comprises a first magnetic core 427, a first primary winding 427a and a first secondary winding 427b, and the first primary winding 427a and the first secondary winding 427b are arranged around the first magnetic core 427. The first secondary winding 427b is located at one side of the first primary winding 427a and is spaced apart from the first primary winding 427a, and the first secondary winding 427b is coupled to the first primary winding 427a. The first primary winding 427a and part of the first magnetic core 427 constitute the first input portion 426a, and the first secondary winding 427b and another part of the first magnetic core 427 constitute the first output portion 426b.

[0189] In some embodiments, the first conversion sub-module 42 is provided with a plurality of mounting connection holes 428. Each mounting connection hole 428 extends along the Z-axis direction and has two openings. One opening is located at the first mating connection surface 421, and the other opening is located at the second mating connection surface 422. For example, the number of mounting connection holes 428 is four. The four mounting connection holes 428 are respectively a first mounting connection hole 428a, a second mounting connection hole 428b, a third mounting connection hole 428c and a fourth mounting connection hole 428d. The first mounting connection hole 428a and the third mounting connection hole 428c are arranged at the first input portion 426a of the first conversion sub-module 42. The second mounting connection hole 428b and the fourth mounting connection hole 428d are arranged at the first output portion 426b of the first conversion sub-module 42. In the Y-axis direction, the second mounting connection hole 428b and the first mounting connection hole 428a are arranged in a straight line and spaced apart. In the X-axis direction, the third mounting connection hole 428c and the first mounting connection hole 428a are arranged in a straight line and spaced apart. In the X-axis direction, the fourth mounting connection hole 428d is located at one side of the second mounting connection hole 428b towards the third mounting connection hole 428c, and is arranged in a straight line with the second mounting connection hole 428b and spaced apart. In the Y-axis direction, the fourth mounting connection hole 428d and the third mounting connection hole 428c are arranged in a straight line and spaced apart.

[0190] For example, Figure 18 , Figure 23 and Figure 24aAs shown, the first conversion sub-module 42 is fixedly connected with the first support 20. The first conversion sub-module 42 is fixedly connected with the first support portion 21. Specifically, the second mating connecting face 422 of the first conversion sub-module 42 is opposite to and in contact with the first support face 211 of the first support portion 21. The first mating connecting face 421 of the first conversion sub-module 42 is away from the first support face 211. The third mating connecting face 423 of the first conversion sub-module 42 is opposite to and spaced apart from the first wall face 221 of the second support portion 22. The fourth mating connecting face 424 of the first conversion sub-module 42 is opposite to and spaced apart from the third support wall face 243 of the receiving portion 24. The sixth mating connecting face 426 of the first conversion sub-module 42 is opposite to and spaced apart from the fifth connecting face 415 of the first receiving sub-module 41. The fifth mating connecting face 425 of the first conversion sub-module 42 is away from the fifth connecting face 415.

[0191] The first installation connecting hole 428a of the first conversion sub-module 42 is matched with the fourth connecting hole 25d of the first support portion 21. The second installation connecting hole 428b of the first conversion sub-module 42 is matched with the fifth connecting hole 25e of the first support portion 21. The third installation connecting hole 428c of the first conversion sub-module 42 is matched with the sixth connecting hole 25f of the first support portion 21. The fourth installation connecting hole 428d of the first conversion sub-module 42 is matched with the seventh connecting hole 25g of the first support portion 21. The first conversion sub-module 42 is fixedly connected with the first support portion 21 through a plurality of fasteners (screws, pins or bolts), and is arranged on one side of the first receiving sub-module 41 and spaced apart from the first receiving sub-module 41. The specific connection mode can refer to the related description of the first receiving sub-module 41, and thus will not be described again. It can be understood that the first conversion sub-module 42 is arranged on the side of the first receiving sub-module 41 facing the receiving portion 24, and is spaced apart from the receiving portion 24.

[0192] As shown, Figure 23 and Figure 23a The first input portion 426a of the first conversion sub-module 42 is located between the first output portion 426b and the first receiving sub-module 41, and is spaced apart from the first receiving sub-module 41. The first variable transformation boundary 426c is flush with the second support end face 246 of the receiving portion 24. The first input portion 426a is electrically connected with the first receiving sub-module 41 by means including but not limited to a cable. In other words, the first input portion 426a is located on the side of the first output portion 426b facing the first receiving sub-module 41, and is electrically connected with the first receiving sub-module 41. It can be understood that the first conversion sub-module 42 is electrically connected with and spaced apart from the first receiving sub-module 41.

[0193] Specifically, the first primary winding 427a is electrically connected with the first inverter unit 417a. In other words, the first inverter unit 417a is electrically connected with the first conversion sub-module 42. The first alternating current output from the first inverter unit 417a can be transmitted to the first primary winding 427a. According to the principle of electromagnetic induction, the first secondary winding 427b couples to output the second alternating current according to the first alternating current. The voltage of the second alternating current is less than the voltage of the first alternating current, and the second alternating current is a low-voltage alternating current. The first conversion sub-module 42 is configured to perform voltage conversion processing on the first alternating current output by the first receiving sub-module 41 to output the second alternating current.

[0194] That is to say, the first alternating current output from the first receiving sub-module 41 can be transmitted to the first input part 426a of the first conversion sub-module 42. According to the first alternating current, the first output part 426b of the first conversion sub-module 42 couples to output the second alternating current. The voltage of the second alternating current is less than the voltage of the first alternating current, and the second alternating current is a low-voltage alternating current. The first conversion sub-module 42 is configured to perform voltage conversion processing on the first alternating current output by the first receiving sub-module 41 to output the second alternating current.

[0195] As shown in Figure 13b and Figure 23 , since the first transformation boundary 426c is flush with the second support end surface 246 of the receiving part 24, the second support end surface 246 is flush with the mating end surface 296 of the fourth conductive layer 29 and the second end surface 286 of the third conductive layer 28, the first transformation boundary 426c is flush with the mating end surface 296 of the fourth conductive layer 29 (as shown in Figure 13b ), and is flush with the second end surface 286 of the third conductive layer 28. Such design is conducive to reducing the electric field at the junction, avoiding the intersection of the low-voltage electric field of the first output part 426b and the medium-voltage electric field of the input module 30, and improving the insulation effect between the input module 30 and the first output part 426b of the first conversion sub-module 42. It is conducive to reducing the distance (the distance in the X-axis direction) between the first conversion sub-module 42 and the input module 30, and conducive to the miniaturization design of the first sub-module 1, and further conducive to the miniaturization design of the power module 102 and the transformer 100.

[0196] Please refer to Figure 24b , and combine Figure 1 , Figure 18 , Figure 23 and Figure 23a , Figure 24b is Figure 5 the first rectifier sub-module 43 and the first output terminal 44 of the first power module 40 of the first sub-module 1 are shown in the perspective structural schematic view.

[0197] As shown in Figure 24bAs shown, the first commutator module 43 is rectangular plate body. The first commutator module 43 comprises a first fixed connection surface 431, a second fixed connection surface 432, a third fixed connection surface 433, a fourth fixed connection surface 434, a fifth fixed connection surface 435 and a sixth fixed connection surface 436. In the Z-axis direction, the first fixed connection surface 431 is arranged opposite to the second fixed connection surface 432 and parallel to the second fixed connection surface 432. In the X-axis direction, the third fixed connection surface 433 is arranged opposite to the fourth fixed connection surface 434 and parallel to the fourth fixed connection surface 434. The third fixed connection surface 433 and the fourth fixed connection surface 434 are connected between the first fixed connection surface 431 and the second fixed connection surface 432 and arranged perpendicular to the first fixed connection surface 431 and the second fixed connection surface 432. In the Y-axis direction, the fifth fixed connection surface 435 is arranged opposite to the sixth fixed connection surface 436 and parallel to the sixth fixed connection surface 436. The fifth fixed connection surface 435 and the sixth fixed connection surface 436 are connected between the first fixed connection surface 431 and the second fixed connection surface 432 and connected between the third fixed connection surface 433 and the fourth fixed connection surface 434. The fifth fixed connection surface 435 and the sixth fixed connection surface 436 are arranged perpendicular to the first fixed connection surface 431, the second fixed connection surface 432, the third fixed connection surface 433 and the fourth fixed connection surface 434.

[0198] In some embodiments, the first commutator module 43 is provided with a plurality of fixed connection holes 437. Each fixed connection hole 437 extends along the Z-axis direction and has two openings. One opening is located on the first fixed connection surface 431 and the other opening is located on the second fixed connection surface 432. Exemplarily, the number of fixed connection holes 437 is four. The four fixed connection holes 437 are respectively a first fixed connection hole 437a, a second fixed connection hole 437b, a third fixed connection hole 437c and a fourth fixed connection hole 437d. In the Y-axis direction, the second fixed connection hole 437b and the first fixed connection hole 437a are arranged in a straight line and spaced apart. In the X-axis direction, the third fixed connection hole 437c and the first fixed connection hole 437a are arranged in a straight line and spaced apart. In the X-axis direction, the fourth fixed connection hole 437d is located on the side of the second fixed connection hole 437b facing the third fixed connection hole 437c, arranged in a straight line with the second fixed connection hole 437b and spaced apart. In the Y-axis direction, the fourth fixed connection hole 437d and the third fixed connection hole 437c are arranged in a straight line and spaced apart.

[0199] As shown, Figure 18 , Figure 23 and Figure 24bAs shown, the first rectifier module 43 is fixedly connected with the first support 20. The first rectifier module 43 is fixedly connected with the first support part 21. Specifically, the second fixed connection face 432 of the first rectifier module 43 is opposite to and in contact with the first support face 211 of the first support part 21. The first fixed connection face 431 of the first rectifier module 43 is away from the first support face 211. The third fixed connection face 433 of the first rectifier module 43 is opposite to and spaced apart from the first wall face 221 of the second support part 22. The fourth fixed connection face 434 of the first rectifier module 43 is opposite to and spaced apart from the third support wall face 243 of the receiving part 24. The sixth fixed connection face 436 of the first rectifier module 43 is opposite to and spaced apart from the fifth cooperation connection face 425 of the first conversion module 42. The fifth fixed connection face 435 of the first rectifier module 43 is away from the fifth cooperation connection face 425.

[0200] The first fixed connection hole 437a of the first rectifier module 43 is matched with the eighth connection hole 25h of the first support part 21. The second fixed connection hole 437b of the first rectifier module 43 is matched with the ninth connection hole 25i of the first support part 21. The third fixed connection hole 437c of the first rectifier module 43 is matched with the tenth connection hole 25j of the first support part 21. The fourth fixed connection hole 437d of the first rectifier module 43 is matched with the eleventh connection hole 25k of the first support part 21. Through a plurality of fasteners (screws, pins or screws), the first rectifier module 43 is fixedly connected with the first support part 21, and the first rectifier module 43 is located on the side of the first conversion module 42 away from the first receiving module 41 and is spaced apart from the first conversion module 42. The specific connection mode can refer to the related description of the first receiving module 41, and thus will not be described again.

[0201] It can be understood that in the Y-axis direction, the first conversion module 42 and the first rectifier module 43 are located on the side of the first receiving module 41 facing the receiving part 24, and in the X-axis direction, the first conversion module 42 and the first rectifier module 43 are located on the side of the receiving part 24 and are both spaced apart from the receiving part 24. In this way, through the insulation of the receiving part 24, the intersection of the low-voltage electric field of the first conversion module 42 and the first receiving module 41 and the medium-voltage electric field of the input module 30 can be avoided, which is conducive to reducing the distance between the first conversion module 42 and the input module 30, conducive to the miniaturization design of the first sub-module 1, and conducive to the miniaturization design of the power module 102. For example, Figure 23 and Figure 23aAs shown, the first rectification sub-module 43 is electrically connected with the first output part 426b of the first conversion sub-module 42 in a manner including but not limited to a cable. Specifically, the first rectification sub-module 43 is electrically connected with the first secondary winding 427b. The second alternating current output from the first secondary winding 427b is transmitted to the first rectification sub-module 43, and the first rectification sub-module 43 is configured to rectify the second alternating current to output the first output direct current. That is, the second alternating current output from the first conversion sub-module 42 is transmitted to the first rectification sub-module 43, and the first rectification sub-module 43 is configured to rectify the second alternating current to output the first output direct current.

[0202] It should be noted that, since the first receiving sub-module 41 transmits a medium-voltage current and the first rectification sub-module 43 transmits a low-voltage current, a high insulation requirement needs to be achieved between the first receiving sub-module 41 and the first rectification sub-module 43, that is, a high insulation requirement needs to be achieved between the medium-voltage side and the low-voltage side. It can be understood that, in the embodiment, the first receiving sub-module 41 and the first rectification sub-module 43 achieve the insulation requirement through the first conversion sub-module 42, so that the spacing between the first receiving sub-module 41 and the first rectification sub-module 43 is reduced, the volume of the first power module 40 is reduced, the miniaturization design of the first sub-module 1 is facilitated, and the miniaturization design of the power module 102 and the transformer 100 is facilitated.

[0203] As shown in FIG. 1, Figure 1 , Figure 23a and Figure 24b As shown, the first output terminal 44 is a rectangular plate body. The first output terminal 44 includes a first connecting wall 441, a second connecting wall 442, a third connecting wall 443, a fourth connecting wall 444, a fifth connecting wall 445, and a sixth connecting wall 446. In the Z-axis direction, the first connecting wall 441 and the second connecting wall 442 are oppositely arranged and parallel. In the X-axis direction, the third connecting wall 443 and the fourth connecting wall 444 are oppositely arranged and parallel. The third connecting wall 443 and the fourth connecting wall 444 are connected between the first connecting wall 441 and the second connecting wall 442 and are perpendicular to the first connecting wall 441 and the second connecting wall 442. In the Y-axis direction, the fifth connecting wall 445 and the sixth connecting wall 446 are oppositely arranged and parallel. The fifth connecting wall 445 and the sixth connecting wall 446 are connected between the first connecting wall 441 and the second connecting wall 442 and are connected between the third connecting wall 443 and the fourth connecting wall 444. The fifth connecting wall 445 and the sixth connecting wall 446 are perpendicular to the first connecting wall 441, the second connecting wall 442, the third connecting wall 443, and the fourth connecting wall 444.

[0204] The first output terminal 44 is located on the side of the first rectifier sub-module 43 opposite to the first conversion sub-module 42 and connected with the first rectifier sub-module 43 by means including but not limited to welding, gluing and the like. Specifically, the sixth connecting wall 446 is opposite to and connected with the fifth fixed connecting surface 435 of the first rectifier sub-module 43. The fifth connecting wall 445 is opposite to the fifth fixed connecting surface 435. The first connecting wall 441 is located between the first fixed connecting surface 431 and the second fixed connecting surface 432 of the first rectifier sub-module 43 and spaced from the first fixed connecting surface 431 and the second fixed connecting surface 432. The second connecting wall 442 is located between the first connecting wall 441 and the second fixed connecting surface 432 and spaced from the first connecting wall 441 and the second fixed connecting surface 432. The third connecting wall 443 is located between the third fixed connecting surface 433 and the fourth fixed connecting surface 434 of the first rectifier sub-module 43 and spaced from the third fixed connecting surface 433 and the fourth fixed connecting surface 434. The fourth connecting wall 444 is located between the third connecting wall 443 and the fourth fixed connecting surface 434 and spaced from the third connecting wall 443 and the fourth fixed connecting surface 434. The first output terminal 44 is used to be electrically connected with the load device 300. The first output direct current output from the first rectifier sub-module 43 is delivered to the load device 300 through the first output terminal 44 to supply the load device 300.

[0205] Please refer again to Figure 20 , and combine Figure 18 , Figure 23 and Figure 23a . As Figure 20As shown, the first heat dissipation sub-module 45 is rectangular plate body. The first heat dissipation sub-module 45 includes a plurality of fans, which are not limited in the present application. The first heat dissipation sub-module 45 includes a first mounting connecting wall 451, a second mounting connecting wall 452, a third mounting connecting wall 453, a fourth mounting connecting wall 454, a fifth mounting connecting wall 455 and a sixth mounting connecting wall 456. In the Z-axis direction, the first mounting connecting wall 451 and the second mounting connecting wall 452 are oppositely arranged and parallel arranged. In the X-axis direction, the third mounting connecting wall 453 and the fourth mounting connecting wall 454 are oppositely arranged and parallel arranged. The third mounting connecting wall 453 and the fourth mounting connecting wall 454 are connected between the first mounting connecting wall 451 and the second mounting connecting wall 452, and are perpendicular to the first mounting connecting wall 451 and the second mounting connecting wall 452. In the Y-axis direction, the fifth mounting connecting wall 455 and the sixth mounting connecting wall 456 are oppositely arranged and parallel arranged. The fifth mounting connecting wall 455 and the sixth mounting connecting wall 456 are connected between the first mounting connecting wall 451 and the second mounting connecting wall 452, and are connected between the third mounting connecting wall 453 and the fourth mounting connecting wall 454. The fifth mounting connecting wall 455 and the sixth mounting connecting wall 456 are perpendicular to the first mounting connecting wall 451, the second mounting connecting wall 452, the third mounting connecting wall 453 and the fourth mounting connecting wall 454.

[0206] In some embodiments, the first heat dissipation sub-module 45 is provided with a plurality of fixed mounting holes 457. Each fixed mounting hole 457 extends along the Z-axis direction and has two openings. One opening is located on the first mounting connecting wall 451, and the other opening is located on the second mounting connecting wall 452. Exemplarily, the number of fixed mounting holes 457 is two. The two fixed mounting holes 457 are respectively a first fixed mounting hole 457a and a second fixed mounting hole 457b. In the X-axis direction, the second fixed mounting hole 457b and the first fixed mounting hole 457a are linearly arranged and spaced apart.

[0207] As Figure 18 , Figure 20 and Figure 23As shown, the first heat dissipation submodule 45 is fixedly connected to the first support member 20. The first heat dissipation submodule 45 is also fixedly connected to the first support portion 21. Specifically, the second mounting connection wall 452 of the first heat dissipation submodule 45 faces and contacts the first support surface 211 of the first support portion 21. The first mounting connection wall 451 of the first heat dissipation submodule 45 faces away from the first support surface 211. The third mounting connection wall 453 of the first heat dissipation submodule 45 faces and is spaced apart from the first wall surface 221 of the second support portion 22. The fourth mounting connection wall 454 of the first heat dissipation submodule 45 faces and is spaced apart from the fourth wall surface 231 of the third support portion 23. The fifth mounting connection wall 455 of the first heat dissipation submodule 45 faces and is spaced apart from the sixth connection surface 416 of the first receiving submodule 41. The sixth mounting connection wall 456 of the first heat dissipation submodule 45 faces away from the sixth connection surface 416.

[0208] The first mounting hole 457a of the first heat dissipation submodule 45 matches the twelfth connecting hole 25l of the first support part 21. The second mounting hole 457b of the first heat dissipation submodule 45 matches the thirteenth connecting hole 25m of the first support part 21. The first heat dissipation submodule 45 is fixedly connected to the first support part 21 by multiple fasteners (screws, pins, or bolts). The first heat dissipation submodule 45 is located on the side of the first receiving submodule 41 facing away from the first conversion submodule 42, and is spaced apart from the first receiving submodule 41. The specific connection method can be referred to the relevant description of the first receiving submodule 41, so it will not be repeated here. Compared with the distance between the first receiving submodule 41 and the first conversion submodule 42, and the distance between the first conversion submodule 42 and the first rectifier submodule 43, the distance between the first heat dissipation submodule 45 and the first receiving submodule 41 is much larger. In the Y-axis direction, the distance between the first heat dissipation submodule 45 and the first receiving submodule 41 is larger than the distance between the first receiving submodule 41 and the first conversion submodule 42 and the distance between the first conversion submodule 42 and the first rectifier submodule 43.

[0209] like Figure 23 and Figure 23a As shown, the first heat dissipation submodule 45 is electrically connected to the first rectifier submodule 43. The first output DC power from the first rectifier submodule 43 can be supplied to the first heat dissipation submodule 45. The first heat dissipation submodule 45 is used to dissipate heat from the first power module 40 and the input module 30. This prevents the temperature of the first power module 40 and the input module 30 from rising too high during operation, which is beneficial for the long-term operation of the first power module 40 and the input module 30, and consequently beneficial for the long-term operation of the first submodule 1 and the power module 102, extending the service life of the power module 102 and improving the safety of the power module 102.

[0210] It should be noted that, since the first heat dissipation sub-module 45 transmits the first output direct current (specifically, low-voltage direct current), and the first receiving sub-module 41 transmits medium-voltage current, a higher insulation requirement needs to be met between the first heat dissipation sub-module 45 and the first receiving sub-module 41. In the Y-axis direction, the larger spacing between the first heat dissipation sub-module 45 and the first receiving sub-module 41 ensures that air can meet the insulation requirement between the first heat dissipation sub-module 45 and the first receiving sub-module 41.

[0211] As shown in Figure 23 and Figure 24 , it can be understood that the first power module 40 is fixedly connected to the surface of the first support portion 21 and electrically connected with the input module 30. The first power module 40 is fixedly connected to the first support surface 211 of the first support portion 21 and electrically connected with the input module 30. The first power module 40 is located on the side of the first support portion 21 facing away from the second conductive layer 27 and is fixedly connected with the first support portion 21. In other words, the surface of the first support portion 21 facing away from the first power module 40 is provided with the second conductive layer 27. The first conductive layer 26 is electrically connected with the first power module 40.

[0212] Through the first conductive layer 26 and the second conductive layer 27, the insulation mode of the first power module 40 on the side of the first power module 40 facing the ground fixedly connected to the first support portion 21 is equivalent to pure solid insulation, and the electric field on the medium-voltage side (including the first receiving sub-module 41 and the first input portion 426a of the first conversion sub-module 42) can be all on the first support portion 21. In this way, not only the insulation effect is strong, but also the insulation requirement of the side of the first power module 40 facing the ground is met, and the thickness dimension of the first support portion 21 can be designed to be very small, which is conducive to reducing the volume of the first sub-module 1 and the miniaturization design of the power module 102.

[0213] That is to say, the first power module 40 and the input module 30 of the first sub-module 1 are grounded through the first shell 10. The first power module 40 and the input module 30 are insulated from the first shell 10 through the first support 20, so that the first power module 40 and the input module 30 realize pure solid insulation on the side facing the ground through the first support 20, which is conducive to the miniaturization design of the first sub-module 1 and the miniaturization design of the power module 102.

[0214] Please refer to Figure 25 , in combination with Figure 3 and Figure 23 , Figure 25 is Figure 2 the perspective structural schematic diagram of the first sub-module 1 and the insulating member 2 after assembly.

[0215] Exemplarily, the insulation member 2 is a plate body. The insulation member 2 is made of an insulating material, such as silica gel or plastic, which is not limited in the present application. In some embodiments, the insulation member 2 comprises a first insulation surface 2a and a second insulation surface 2b. The first insulation surface 2a and the second insulation surface 2b are oppositely arranged and parallelly arranged in the Z-axis direction. The first insulation surface 2a is fixedly connected to the first connecting surface 411 of the first receiving submodule 41, the first mating connecting surface 421 of the first conversion submodule 42, the first fixed connecting surface 431 of the first rectifying submodule 43, and the first mounting connecting wall 451 of the first heat dissipation submodule 45 by means of, but not limited to, welding or gluing.

[0216] The insulation member 2 is fixedly stacked on the first power module 40. In the Z-axis direction, the projection of the first receiving submodule 41, the projection of the first conversion submodule 42, the projection of the first rectifying submodule 43, and the projection of the first heat dissipation submodule 45 are all located inside the projection of the insulation member 2. In the Z-axis direction, the projection of the part of the input fuse 33 exposed outside the receiving portion 24 is located inside the projection of the insulation member 2, and the projection of the receiving portion 24 is located outside the projection of the insulation member 2.

[0217] Please refer to Figure 26 and Figure 27 , and combine Figure 1 and Figure 2 , Figure 26 is Figure 2 a second submodule 3 of the power module 102 shown in the perspective structural schematic view from another angle. Figure 27 is Figure 26 a perspective structural exploded schematic view of the second submodule 3.

[0218] As shown in Figure 2 , Figure 26 and Figure 27 , in some embodiments, the second submodule 3 comprises a second housing 50, a second support 60, and a second power module 70. The second housing 50 is used for grounding. The second support 60 is fixedly connected to the second housing 50. The second support 60 is grounded through the second housing 50. The second power module 70 is located on the side of the second support 60 away from the second housing 50 and is fixedly connected to the second support 60. The second power module 70 is insulated from the second housing 50 through the second support 60. In other words, the second support 60 is used to insulate the second power module 70 from the second housing 50. It can be understood that the second housing 50 and the second support 60 constitute a second outer housing, i.e., the second outer housing comprises the second housing 50 and the second support 60, and the second support 60 is connected to the second housing 50. That is to say, the second submodule 3 comprises a second outer housing and a second power module 70, and the second power module 70 is fixedly connected to the second outer housing. The second power module 70 is grounded and insulated through the second outer housing.

[0219] The second shell body is buckled and fixedly connected with the first shell body. Specifically, the second shell body 50 is buckled with the first shell body 10 and is fixedly connected with the first shell body 10, and the second support member 60 is buckled with the first support member 20 and is fixedly connected with the first support member 20. In the Z-axis direction, the second power module 70 is located between the first shell body and the second shell body and is spaced apart from the first power module 40 and is electrically connected with the first power module 40. In the Z-axis direction, the second power module 70 partially overlaps the input module 30. The second power module 70 is electrically connected with the input module 30 through the first power module 40. The insulating member 2 is located between the first power module 40 and the second power module 70.

[0220] As shown in Figure 1 , Figure 2 and Figure 26 , the input module 30 is configured to receive the output alternating current output from the output end 201 of the alternating current power supply 200 and output to the first power module 40. The first power module 40 delivers the output alternating current to the second power module 70. The second power module 70 is configured to convert the output alternating current into second output direct current and deliver the second output direct current to the load device 300 for supplying the load device 300. The power module 102 converts the output alternating current into two-way output direct current through the first sub-module 1 and the second sub-module 3 and delivers the two-way output direct current to the load device 300 for supplying the load device 300.

[0221] Please refer to Figure 28 , and in combination with Figure 1 , Figure 28 is Figure 27 the second shell body 50 of the second sub-module 3.

[0222] For example, the second shell body 50 is made of copper. In other embodiments, the second shell body 50 can also be made of other metal materials such as aluminum, iron, or other conductive materials, which are not limited in the present application. The second shell body 50 is in contact with and connected with the main shell 101 by means including but not limited to gluing, welding or buckling connection, and the second shell body 50 is grounded through the main shell 101.

[0223] In some embodiments, the second housing 50 comprises a first fitting connecting portion 51, a second fitting connecting portion 52 and a third fitting connecting portion 53. In the X-axis direction, the first fitting connecting portion 51 is fixedly connected between the second fitting connecting portion 52 and the third fitting connecting portion 53, and the second fitting connecting portion 52 and the third fitting connecting portion 53 are oppositely and spacedly arranged. The second fitting connecting portion 52 and the third fitting connecting portion 53 are arranged in parallel. In other words, the second fitting connecting portion 52 and the third fitting connecting portion 53 are fixedly connected on both sides of the first fitting connecting portion 51. The second fitting connecting portion 52, the first fitting connecting portion 51 and the third fitting connecting portion 53 are sequentially enclosed to form the second mounting groove 54. Exemplarily, the first fitting connecting portion 51, the second fitting connecting portion 52 and the third fitting connecting portion 53 are integrally formed, which is conducive to improving the overall strength of the second housing 50.

[0224] Exemplarily, the first fitting connecting portion 51, the second fitting connecting portion 52 and the third fitting connecting portion 53 are all rectangular plate bodies. In other embodiments, the first fitting connecting portion 51, the second fitting connecting portion 52 and the third fitting connecting portion 53 can also be circular column bodies, trapezoidal plate bodies or other shapes, and the shape of the first fitting connecting portion 51, the second fitting connecting portion 52 and the third fitting connecting portion 53 is not specifically limited in the present application.

[0225] The first fitting connecting portion 51 comprises a first fitting surface 511. The second fitting connecting portion 52 is arranged on the first fitting surface 511 and is arranged perpendicularly to the first fitting connecting portion 51. The second fitting connecting portion 52 comprises a second fitting surface 521 and a third fitting surface 522, the third fitting surface 522 is arranged perpendicularly to the second fitting surface 521 and is connected to the second fitting surface 521. Among them, in the X-axis direction, the second fitting surface 521 is located on one side of the first fitting surface 511 and is connected to the first fitting surface 511, and is arranged perpendicularly to the first fitting surface 511. In the Z-axis direction, the third fitting surface 522 is located at one end of the second fitting surface 521 away from the first fitting surface 511, and is arranged in parallel and spaced apart from the first fitting surface 511. In the X-axis direction, the third fitting surface 522 is located on one side of the second fitting surface 521 away from the first fitting surface 511.

[0226] The third matching connecting part 53 comprises a fourth matching surface 531 and a fifth matching surface 532. The fifth matching surface 532 is arranged perpendicularly to the fourth matching surface 531 and is connected to the fourth matching surface 531. In the X-axis direction, the fourth matching surface 531 is located on the side of the first matching surface 511 away from the second matching surface 521 and is connected to the first matching surface 511 and arranged perpendicularly to the first matching surface 511. In the X-axis direction, the fourth matching surface 531 is arranged in parallel to and spaced apart from the second matching surface 521. In the Z-axis direction, the fifth matching surface 532 is located at the end of the fourth matching surface 531 away from the first matching surface 511. The fifth matching surface 532 is arranged in parallel to and spaced apart from the first matching surface 511. In the X-axis direction, the fifth matching surface 532 is located on the side of the fourth matching surface 531 away from the first matching surface 511. The fifth matching surface 532 is flush with the third matching surface 522. In some other embodiments, the fifth matching surface 532 can not be flush with the third matching surface 522. It can be understood that the first matching surface 511, the second matching surface 521 and the fourth matching surface 531 are the wall of the second mounting groove 54.

[0227] Please refer to Figure 29 , Figure 30 and Figure 31 , Figure 29 is Figure 27 the perspective structural schematic view of the second support 60 of the second sub-module 3. Figure 30 is Figure 29 the structural schematic view of the second support 60 from another angle. Figure 31 is Figure 30 the sectional view of the second support 60 along the line L8-L8.

[0228] As shown in Figure 29 and Figure 30 , the second support 60 is made of an insulating material, for example, silica gel or plastic, which is not limited in the present application. In some embodiments, the second support 60 comprises a first matching support part 61, a second matching support part 62 and a third matching support part 63. In the X-axis direction, the second matching support part 62 is located on the side of the first matching support part 61 and is fixedly connected to the first matching support part 61. The third matching support part 63 is located on the other side of the first matching support part 61 and is fixedly connected to the first matching support part 61. In other words, the second matching support part 62 and the third matching support part 63 are fixedly connected to the two sides of the first matching support part 61. The first matching support part 61, the second matching support part 62 and the third matching support part 63 are integrally formed, which is beneficial to improve the overall strength of the second support 60.

[0229] Exemplarily, the first matching support part 61 is a plate body. In other embodiments, the first matching support part 61 can also be a column body, or a block body, or other shapes, which are not specifically limited in the present application. The first matching support part 61 comprises a first support layer surface 611 and a second support layer surface 612. In the Z-axis direction, the first support layer surface 611 is arranged opposite to the second support layer surface 612 and parallel to the second support layer surface 612.

[0230] Exemplarily, the second matching support part 62 is a plate body. In other embodiments, the second matching support part 62 can also be a column body, or a block body, or other shapes, which are not specifically limited in the present application. The second matching support part 62 comprises a first layer surface 621, a second layer surface 622 and a third layer surface 623. In the X-axis direction, the first layer surface 621 is arranged opposite to the second layer surface 622 and parallel to the second layer surface 622. The third layer surface 623 is connected between the first layer surface 621 and the second layer surface 622 and is arranged perpendicular to the first layer surface 621 and the second layer surface 622. Among them, in the Z-axis direction, the first layer surface 621 is located on the side of the first support layer surface 611 away from the second support layer surface 612. In the X-axis direction, the first layer surface 621 is located on the side of the first support layer surface 611 and is connected to the first support layer surface 611 and is arranged perpendicular to the first support layer surface 611. In the X-axis direction, the second layer surface 622 is located on the side of the first layer surface 621 away from the first support layer surface 611 and is located on the side of the second support layer surface 612. The second layer surface 622 is connected to the second support layer surface 612 and is arranged perpendicular to the second support layer surface 612. In the Z-axis direction, the third layer surface 623 is located on the side of the first support layer surface 611 away from the second support layer surface 612 and is arranged parallel to and spaced apart from the first support layer surface 611.

[0231] Exemplarily, the third matching support part 63 is a plate body. In other embodiments, the third matching support part 63 can also be a column body, or a block body, or other shapes, which are not specifically limited in the present application. The third matching support part 63 comprises a fourth layer surface 631, a fifth layer surface 632, and a sixth layer surface 633. In the X-axis direction, the fourth layer surface 631 and the fifth layer surface 632 are oppositely arranged and parallel. The sixth layer surface 633 is connected between the fourth layer surface 631 and the fifth layer surface 632, and is arranged perpendicularly to the fourth layer surface 631 and the fifth layer surface 632. Among them, in the Z-axis direction, the fourth layer surface 631 is located on the side of the first support layer surface 611 away from the second support layer surface 612. In the X-axis direction, the fourth layer surface 631 is located on the side of the first support layer surface 611 away from the first layer surface 621, and is connected to and arranged perpendicularly to the first support layer surface 611. In the X-axis direction, the fifth layer surface 632 is located on the side of the fourth layer surface 631 away from the first support layer surface 611, and is located on the side of the second support layer surface 612 away from the second layer surface 622, and is connected to and arranged perpendicularly to the second support layer surface 612. In the Z-axis direction, the sixth layer surface 633 is located on the side of the first support layer surface 611 away from the second support layer surface 612, and is arranged parallel to and spaced apart from the first support layer surface 611.

[0232] In some embodiments, the second support 60 is provided with a plurality of fixing holes 64. Specifically, the first matching support part 61 is provided with a plurality of fixing holes 64. Each fixing hole 64 extends along the Z-axis direction and has an opening on the first support layer surface 611. Exemplarily, the number of fixing holes 64 is thirteen. The thirteen fixing holes 64 are respectively a first fixing hole 64a, a second fixing hole 64b, a third fixing hole 64c, a fourth fixing hole 64d, a fifth fixing hole 64e, a sixth fixing hole 64f, a seventh fixing hole 64g, an eighth fixing hole 64h, a ninth fixing hole 64i, a tenth fixing hole 64j, an eleventh fixing hole 64k, a twelfth fixing hole 64l, and a thirteenth fixing hole 64m.

[0233] In the Y-axis direction, the twelfth fixing hole 64l, the first fixing hole 64a, the second fixing hole 64b, the fourth fixing hole 64d, the fifth fixing hole 64e, the eighth fixing hole 64h, and the ninth fixing hole 64i are arranged in a straight line and spaced apart from each other. In the X-axis direction, the thirteenth fixing hole 64m is arranged in a straight line and spaced apart from the twelfth fixing hole 64l. In the X-axis direction, the third fixing hole 64c is located on the side of the first fixing hole 64a facing the thirteenth fixing hole 64m, and is arranged in a straight line and spaced apart from the first fixing hole 64a.

[0234] In the X-axis direction, the sixth fixing hole 64f is located on the side of the fourth fixing hole 64d facing the third fixing hole 64c, and is arranged in a straight line with the fourth fixing hole 64d and spaced apart. In the Y-axis direction, the sixth fixing hole 64f and the third fixing hole 64c are arranged in a straight line and spaced apart. In the X-axis direction, the seventh fixing hole 64g is located on the side of the fifth fixing hole 64e facing the sixth fixing hole 64f, and is arranged in a straight line with the fifth fixing hole 64e and spaced apart. In the Y-axis direction, the seventh fixing hole 64g and the sixth fixing hole 64f are arranged in a straight line and spaced apart. In the X-axis direction, the tenth fixing hole 64j is located on the side of the eighth fixing hole 64h facing the seventh fixing hole 64g, and is arranged in a straight line with the eighth fixing hole 64h and spaced apart. In the Y-axis direction, the tenth fixing hole 64j and the seventh fixing hole 64g are arranged in a straight line and spaced apart. In the X-axis direction, the eleventh fixing hole 64k is located on the side of the ninth fixing hole 64i facing the tenth fixing hole 64j, and is arranged in a straight line with the ninth fixing hole 64i and spaced apart. In the Y-axis direction, the eleventh fixing hole 64k and the tenth fixing hole 64j are arranged in a straight line and spaced apart.

[0235] like Figure 30 and Figure 31 As shown, in some embodiments, a first conductive layer 65 is provided inside the first mating support portion 61. Specifically, the first conductive layer 65 is embedded inside the first mating support portion 61. Exemplarily, the projection of the first conductive layer 65 in the Z-axis direction is rectangular. In other embodiments, the projection of the first conductive layer 65 in the Z-axis direction may also be circular, trapezoidal, or triangular, etc., and this application does not specifically limit this. In the Z-axis direction, the projections of the first fixing hole 64a, the second fixing hole 64b, and the third fixing hole 64c are all located inside the projection of the first conductive layer 65, and the projections of the other fixing holes 64 are all located outside the projection of the first conductive layer 65. In the Z-axis direction, the first conductive layer 65 is located between the first fixing hole 64a, the second fixing hole 64b, and the third fixing hole 64c and the second support layer 612. The first conductive layer 65 and the second support layer 612 are arranged parallel to each other and spaced apart. The first conductive layer 65 is partially exposed outside the first mating support portion 61 through the first fixing hole 64a, the second fixing hole 64b and the third fixing hole 64c.

[0236] In some embodiments, the surface of the first matching support part 61 facing away from the first current-carrying layer 65 is provided with a second current-carrying layer 66. In the Z-axis direction, the projection of the first current-carrying layer 65 is located inside the projection of the second current-carrying layer 66. Specifically, the second current-carrying layer 66 is located on the side of the second support layer surface 612 of the first matching support part 61 facing away from the first current-carrying layer 65 and is connected with the first matching support part 61. The second current-carrying layer 66 is laminated on the second support layer surface 612 of the first matching support part 61. For example, in the Z-axis direction, the projection of the second current-carrying layer 66 is rectangular. In other embodiments, in the Z-axis direction, the projection of the second current-carrying layer 66 can also be circular, trapezoidal, triangular, etc., which are not limited in the present application. The second current-carrying layer 66 is arranged in parallel with the first current-carrying layer 65. In the Z-axis direction, the projection area of the second current-carrying layer 66 is equal to the projection area of the first current-carrying layer 65, and the projection of the second current-carrying layer 66 completely overlaps the projection of the first current-carrying layer 65. In other embodiments, in the Z-axis direction, the projection area of the second current-carrying layer 66 can also be greater than the projection area of the first current-carrying layer 65, and the projection of the first current-carrying layer 65 is entirely located inside the projection of the second current-carrying layer 66.

[0237] Please refer to Figure 32 and Figure 33 , and combine with Figure 27 , Figure 32 is Figure 27 the second housing 50 of the second subassembly 3 and the second support 60 after assembly. Figure 33 is Figure 32 the second housing 50 and the second support 60 along the line L9-L9 part of the sectional view.

[0238] As shown in Figure 27 and Figure 32 , the second support 60 is fixedly connected with the second housing 50. Specifically, by means including but not limited to welding or gluing, the second support 60 is accommodated in the second mounting groove 54 of the second housing 50. The second support layer surface 612 of the first matching support part 61 of the second support 60 is opposite to and fixedly connected with the first matching surface 511 of the first matching connection part 51 of the second housing 50. The first support layer surface 611 of the first matching support part 61 faces away from the first matching surface 511. The first matching support part 61 is fixedly laminated on the first matching connection part 51. In other words, the first matching support part 61 is laminated with the second housing 50.

[0239] The second layer surface 622 of the second matching support part 62 is opposite to and fixedly connected with the second matching surface 521 of the second matching connecting part 52. The first layer surface 621 of the second matching support part 62 is away from the second matching surface 521. The third layer surface 623 of the second matching support part 62 is flush with the fourth matching surface 531 of the second matching connecting part 52. The second matching support part 62 is fixedly stacked on the second matching connecting part 52. The fifth layer surface 632 of the third matching support part 63 is opposite to and fixedly connected with the fourth matching surface 531 of the third matching connecting part 53. The fourth layer surface 631 of the third matching support part 63 is away from the fourth matching surface 531. The sixth layer surface 633 of the third matching support part 63 is flush with the fifth matching surface 532 of the third matching connecting part 53. The third matching support part 63 is fixedly stacked on the third matching connecting part 53.

[0240] As shown in Figure 32 and Figure 33 , the second current-carrying layer 66 is located between the second support layer surface 612 and the first matching surface 511 and connected with the second support layer surface 612 and the first matching surface 511. The second current-carrying layer 66 is connected between the first matching support part 61 and the first matching connecting part 51. That is, the second current-carrying layer 66 is located between the first matching support part 61 and the second shell 50. Since the first matching support part 61 and the second shell 50 are stacked, the second current-carrying layer 66 is electrically connected with the second shell 50, the second current-carrying layer 66 is grounded through the second shell 50, that is, the second current-carrying layer 66 is connected to the PE potential.

[0241] It should be noted that there is a gap between the first matching support part 61 and the first matching connecting part 51, the second matching support part 62 and the second matching connecting part 52, and the third matching support part 63 and the third matching connecting part 53. The gap can be used to accommodate solder or various adhesives, which are not limited in the present application.

[0242] Please refer to Figure 34 , Figure 35 , Figure 35a and Figure 36 , and in combination with Figure 27 and Figure 30 , Figure 34 is Figure 27 the second receiving sub-module 71 and the second heat dissipation sub-module 75 of the second power module 70 of the second sub-module 3. Figure 35 is Figure 27 the structure block diagram of the second power module 70 of the second sub-module 3. Figure 35a is Figure 27 the structure diagram of the second sub-module 3 after assembly from another angle. Figure 36 is Figure 35aThe second sub-module 3 shown is a partial cross-sectional view along the L10-L10 line.

[0243] As shown in Figure 27 , Figure 34 and Figure 35 In some embodiments, the second power module 70 includes a second receiving sub-module 71, a second conversion sub-module 72, a second rectification sub-module 73, a second output terminal 74, and a second heat dissipation sub-module 75. In the Y-axis direction, the second conversion sub-module 72 is located on one side of the second receiving sub-module 71 and is spaced apart from the second receiving sub-module 71, and is electrically connected to the second receiving sub-module 71. In the Y-axis direction, the second rectification sub-module 73 is located on the side of the second conversion sub-module 72 away from the second receiving sub-module 71, and is spaced apart from the second conversion sub-module 72, and is electrically connected to the second conversion sub-module 72. In other words, the second receiving sub-module 71, the second conversion sub-module 72, and the second rectification sub-module 73 are sequentially spaced apart and electrically connected.

[0244] In the Y-axis direction, the second output terminal 74 is located on the side of the second rectification sub-module 73 away from the second conversion sub-module 72, and is connected to the second rectification sub-module 73. In the Y-axis direction, the second heat dissipation sub-module 75 is located on the side of the second receiving sub-module 71 away from the second conversion sub-module 72, and is spaced apart from the second receiving sub-module 71, and is connected to the second rectification sub-module 73.

[0245] For example, the second receiving sub-module 71 is a rectangular plate body. The second receiving sub-module 71 includes a first mounting wall surface 711, a second mounting wall surface 712, a third mounting wall surface 713, a fourth mounting wall surface 714, a fifth mounting wall surface 715, and a sixth mounting wall surface 716. In the Z-axis direction, the first mounting wall surface 711 is arranged opposite to the second mounting wall surface 712 and is arranged parallel. In the X-axis direction, the third mounting wall surface 713 is arranged opposite to the fourth mounting wall surface 714 and is arranged parallel. The third mounting wall surface 713 and the fourth mounting wall surface 714 are connected between the first mounting wall surface 711 and the second mounting wall surface 712, and are arranged perpendicular to the first mounting wall surface 711 and the second mounting wall surface 712. In the Y-axis direction, the fifth mounting wall surface 715 is arranged opposite to the sixth mounting wall surface 716 and is arranged parallel. The fifth mounting wall surface 715 and the sixth mounting wall surface 716 are connected between the first mounting wall surface 711 and the second mounting wall surface 712, and are connected between the third mounting wall surface 713 and the fourth mounting wall surface 714. The fifth mounting wall surface 715 and the sixth mounting wall surface 716 are arranged perpendicular to the first mounting wall surface 711, the second mounting wall surface 712, the third mounting wall surface 713, and the fourth mounting wall surface 714.

[0246] The second receiving submodule 71 includes a second rectifier unit 717 and a second inverter unit 717a. In the X-axis direction, the second inverter unit 717a is located on one side of the second rectifier unit 717 and is connected to the second rectifier unit 717. It can be understood that the second rectifier unit 717 includes a portion of a first mounting wall 711, a portion of a second mounting wall 712, a third mounting wall 713, a portion of a fifth mounting wall 715, and a portion of a sixth mounting wall 716. The second inverter unit 717a includes another portion of a first mounting wall 711, another portion of a second mounting wall 712, a fourth mounting wall 714, another portion of a fifth mounting wall 715, and another portion of a sixth mounting wall 716.

[0247] In some embodiments, the second receiving submodule 71 is provided with a plurality of through holes 718. Each through hole 718 extends along the Z-axis direction and has two openings. One opening is located on the first mounting wall surface 711, and the other opening is located on the second mounting wall surface 712. Exemplarily, the number of through holes 718 is three. The three through holes 718 are a first through hole 718a, a second through hole 718b, and a third through hole 718c. The first through hole 718a and the second through hole 718b are provided in the second rectifier unit 717. The third through hole 718c is provided in the second inverter unit 717a. In the Y-axis direction, the second through hole 718b and the first through hole 718a are arranged in a straight line and spaced apart. In the X-axis direction, the third through hole 718c and the first through hole 718a are arranged in a straight line and spaced apart.

[0248] like Figure 30 , Figure 34 and Figure 35a As shown, the second receiving submodule 71 is fixedly connected to the second support member 60. The second receiving submodule 71 is also fixedly connected to the first mating support member 61. Specifically, the second mounting wall surface 712 of the second receiving submodule 71 faces and contacts the first support surface 611 of the first mating support member 61. The first mounting wall surface 711 of the second receiving submodule 71 faces away from the first support surface 611. The third mounting wall surface 713 of the second receiving submodule 71 faces and is spaced apart from the first surface 621 of the second mating support member 62. The fourth mounting wall surface 714 of the second receiving submodule 71 faces and is spaced apart from the fourth surface 631 of the third mating support member 63. The first through hole 718a of the second receiving submodule 71 matches the first fixing hole 64a of the first mating support member 61. The second through hole 718b of the second receiving submodule 71 matches the second fixing hole 64b of the first mating support member 61. The third through hole 718c of the second receiving submodule 71 matches the third fixing hole 64c of the first mating support member 61.

[0249] The second receiving sub-module 71 is fixedly connected with the first cooperating support portion 61 by a plurality of fasteners (screws, pins or bolts). For example, a fourth fastener passes through the first through hole 718a and the first fixing hole 64a. A fifth fastener passes through the second through hole 718b and the second fixing hole 64b. A sixth fastener passes through the third through hole 718c and the third fixing hole 64c. Thus, the second receiving sub-module 71 is fixedly connected with the first cooperating support portion 61.

[0250] As shown in Figure 35a and Figure 36 , the fourth fastener passing through the first through hole 718a and the first fixing hole 64a contacts the first power supply layer 65. The fifth fastener passing through the second through hole 718b and the second fixing hole 64b contacts the first power supply layer 65. The sixth fastener passing through the third through hole 718c and the third fixing hole 64c contacts the first power supply layer 65. Thus, the second receiving sub-module 71 is electrically connected with the first power supply layer 65 by the plurality of fasteners. It can be understood that the first power supply layer 65 is electrically connected with the second power module 70.

[0251] Please refer to Figure 36a , and combine Figure 30 , Figure 35 and Figure 35a , Figure 36a , and Figure 27 is a perspective structural schematic view of the second conversion sub-module 72 of the second power module 70 of the second sub-module 3.

[0252] As shown in Figure 35 and Figure 36aAs shown, the second conversion submodule 72 is rectangular plate body. The second conversion submodule 72 comprises a first mating connecting wall 721, a second mating connecting wall 722, a third mating connecting wall 723, a fourth mating connecting wall 724, a fifth mating connecting wall 725 and a sixth mating connecting wall 726. In the Z-axis direction, the first mating connecting wall 721 and the second mating connecting wall 722 are oppositely arranged and parallel arranged. In the X-axis direction, the third mating connecting wall 723 and the fourth mating connecting wall 724 are oppositely arranged and parallel arranged. The third mating connecting wall 723 and the fourth mating connecting wall 724 are connected between the first mating connecting wall 721 and the second mating connecting wall 722 and are perpendicular to the first mating connecting wall 721 and the second mating connecting wall 722. In the Y-axis direction, the fifth mating connecting wall 725 and the sixth mating connecting wall 726 are oppositely arranged and parallel arranged. The fifth mating connecting wall 725 and the sixth mating connecting wall 726 are connected between the first mating connecting wall 721 and the second mating connecting wall 722 and are connected between the third mating connecting wall 723 and the fourth mating connecting wall 724. The fifth mating connecting wall 725 and the sixth mating connecting wall 726 are perpendicular to the first mating connecting wall 721, the second mating connecting wall 722, the third mating connecting wall 723 and the fourth mating connecting wall 724.

[0253] The second conversion submodule 72 comprises a second input part 726a and a second output part 726b. In the Y-axis direction, the second output part 726b is located on one side of the second input part 726a and is connected to the second input part 726a. The second output part 726b is coupled to the second input part 726a. The second output part 726b and the second input part 726a have a second transformation boundary 726c therebetween. The second transformation boundary 726c is located between the fifth mating connecting wall 725 and the sixth mating connecting wall 726 and is parallel and spaced apart from the fifth mating connecting wall 725 and the sixth mating connecting wall 726.

[0254] The second conversion submodule 72 comprises a second magnetic core 727, a second primary winding 727a and a second secondary winding 727b, and the second primary winding 727a and the second secondary winding 727b are arranged around the second magnetic core 727. The second secondary winding 727b is located on one side of the second primary winding 727a and is spaced apart, and the second secondary winding 727b is coupled to the second primary winding 727a. The second primary winding 727a and part of the second magnetic core 727 constitute the second input part 726a, and the second secondary winding 727b and another part of the second magnetic core 727 constitute the second output part 726b.

[0255] In some embodiments, the second conversion submodule 72 is provided with a plurality of through holes 728. Each through hole 728 extends along the Z-axis direction and has two openings. One opening is located in the first mating connecting wall 721, and the other opening is located in the second mating connecting wall 722. Exemplarily, the number of through holes 728 is four. The four through holes 728 are respectively a first through hole 728a, a second through hole 728b, a third through hole 728c, and a fourth through hole 728d. The first through hole 728a and the third through hole 728c are provided in the second input portion 726a of the second conversion submodule 72. The second through hole 728b and the fourth through hole 728d are provided in the second output portion 726b of the second conversion submodule 72. In the Y-axis direction, the second through hole 728b is arranged in a straight line with the first through hole 728a and is spaced apart. In the X-axis direction, the third through hole 728c is arranged in a straight line with the first through hole 728a and is spaced apart. In the X-axis direction, the fourth perforation 728d is located on the side of the second perforation 728b facing the third perforation 728c, and is arranged in a straight line with the second perforation 728b, with intervals between them. In the Y-axis direction, the fourth perforation 728d is arranged in a straight line with the third perforation 728c, with intervals between them.

[0256] like Figure 30 , Figure 35a and Figure 36a As shown, the second conversion submodule 72 is fixedly connected to the second support member 60. The second conversion submodule 72 is also fixedly connected to the first mating support member 61. Specifically, the second mating connecting wall 722 of the second conversion submodule 72 is opposite to and in contact with the first support surface 611 of the first mating support member 61. The first mating connecting wall 721 of the second conversion submodule 72 faces away from the first support surface 611. The third mating connecting wall 723 of the second conversion submodule 72 is opposite to and spaced from the first surface 621 of the second mating support member 62. The fourth mating connecting wall 724 of the second conversion submodule 72 is opposite to and spaced from the fourth surface 631 of the third mating support member 63. The sixth mating connecting wall 726 of the second conversion submodule 72 is opposite to and spaced from the fifth mounting wall surface 715 of the second receiving submodule 71. The fifth mating connecting wall 725 of the second conversion submodule 72 faces away from the fifth mounting wall surface 715.

[0257] The first through hole 728a of the second conversion sub-module 72 matches the fourth fixing hole 64d of the first matching support part 61. The second through hole 728b of the second conversion sub-module 72 matches the fifth fixing hole 64e of the first matching support part 61. The third through hole 728c of the second conversion sub-module 72 matches the sixth fixing hole 64f of the first matching support part 61. The fourth through hole 728d of the second conversion sub-module 72 matches the seventh fixing hole 64g of the first matching support part 61. The second conversion sub-module 72 is fixedly connected with the first matching support part 61 through a plurality of fasteners (screws, pins or screws), and is located on one side of the second receiving sub-module 71 and is spaced apart from the second receiving sub-module 71. The specific connection mode can refer to the related description of the second receiving sub-module 71, and thus will not be described again.

[0258] As shown in Figure 35 and Figure 35a , the second input part 726a of the second conversion sub-module 72 is located between the second output part 726b and the second receiving sub-module 71, and is spaced apart from the second receiving sub-module 71. The second input part 726a is electrically connected with the second receiving sub-module 71 by means including but not limited to a cable. It can be understood that the second conversion sub-module 72 is electrically connected with and spaced apart from the second receiving sub-module 71. Specifically, the second original side winding 727a is electrically connected with the second inversion unit 717a. It can be understood that the second inversion unit 717a is electrically connected with the second conversion sub-module 72.

[0259] Please refer to Figure 36b , and combine Figure 1 , Figure 30 , Figure 35 and Figure 35a , Figure 36b , as shown in Figure 27 the second rectifier sub-module 73 of the second power module 70 of the second sub-module 3.

[0260] As shown in Figure 36bAs shown, the second commutator module 73 is rectangular plate body. The second commutator module 73 comprises a first fixed connection wall surface 731, a second fixed connection wall surface 732, a third fixed connection wall surface 733, a fourth fixed connection wall surface 734, a fifth fixed connection wall surface 735 and a sixth fixed connection wall surface 736. In the Z-axis direction, the first fixed connection wall surface 731 and the second fixed connection wall surface 732 are oppositely arranged and parallel arranged. In the X-axis direction, the third fixed connection wall surface 733 and the fourth fixed connection wall surface 734 are oppositely arranged and parallel arranged. The third fixed connection wall surface 733 and the fourth fixed connection wall surface 734 are connected between the first fixed connection wall surface 731 and the second fixed connection wall surface 732, and are perpendicular to the first fixed connection wall surface 731 and the second fixed connection wall surface 732. In the Y-axis direction, the fifth fixed connection wall surface 735 and the sixth fixed connection wall surface 736 are oppositely arranged and parallel arranged. The fifth fixed connection wall surface 735 and the sixth fixed connection wall surface 736 are connected between the first fixed connection wall surface 731 and the second fixed connection wall surface 732, and are connected between the third fixed connection wall surface 733 and the fourth fixed connection wall surface 734. The fifth fixed connection wall surface 735 and the sixth fixed connection wall surface 736 are perpendicular to the first fixed connection wall surface 731, the second fixed connection wall surface 732, the third fixed connection wall surface 733 and the fourth fixed connection wall surface 734.

[0261] In some embodiments, the second commutator module 73 is provided with a plurality of through holes 737. Each through hole 737 extends along the Z-axis direction and has two openings. One opening is located on the first fixed connection wall surface 731, and the other opening is located on the second fixed connection wall surface 732. Exemplarily, the number of through holes 737 is four. The four through holes 737 are respectively a first through hole 737a, a second through hole 737b, a third through hole 737c and a fourth through hole 737d. In the Y-axis direction, the second through hole 737b and the first through hole 737a are linearly arranged and spaced apart. In the X-axis direction, the third through hole 737c and the first through hole 737a are linearly arranged and spaced apart. In the X-axis direction, the fourth through hole 737d is located on the side of the second through hole 737b facing the third through hole 737c, and is linearly arranged with the second through hole 737b and spaced apart. In the Y-axis direction, the fourth through hole 737d and the third through hole 737c are linearly arranged and spaced apart.

[0262] As shown, Figure 30 , Figure 35a and Figure 36bAs shown, the second rectifier module 73 is fixedly connected with the second support 60. The second rectifier module 73 is fixedly connected with the first matching support part 61. Specifically, the second fixed connection wall surface 732 of the second rectifier module 73 is opposite to and in contact with the first support layer surface 611 of the first matching support part 61. The first fixed connection wall surface 731 of the second rectifier module 73 is away from the first support layer surface 611. The third fixed connection wall surface 733 of the second rectifier module 73 is opposite to and spaced from the first layer surface 621 of the second matching support part 62. The fourth fixed connection wall surface 734 of the second rectifier module 73 is opposite to and spaced from the fourth layer surface 631 of the third matching support part 63. The sixth fixed connection wall surface 736 of the second rectifier module 73 is opposite to and spaced from the fifth matching connection wall 725 of the second conversion module 72. The fifth fixed connection wall surface 735 of the second rectifier module 73 is away from the fifth matching connection wall 725.

[0263] The first via hole 737a of the second rectifier module 73 matches the eighth fixed hole 64h of the first matching support part 61. The second via hole 737b of the second rectifier module 73 matches the ninth fixed hole 64i of the first matching support part 61. The third via hole 737c of the second rectifier module 73 matches the tenth fixed hole 64j of the first matching support part 61. The fourth via hole 737d of the second rectifier module 73 matches the eleventh fixed hole 64k of the first matching support part 61. Through a plurality of fasteners (screws, pins or screws), the second rectifier module 73 is fixedly connected with the first matching support part 61, and the second rectifier module 73 is located on the side of the second conversion module 72 away from the second receiving module 71 and is spaced from the second conversion module 72. The specific connection mode can refer to the related description of the second receiving module 71, and thus will not be described again.

[0264] As shown in Figure 35 and Figure 35a , the second rectifier module 73 is electrically connected with the second output part 726b of the second conversion module 72 by means including but not limited to a cable. Specifically, the second rectifier module 73 is electrically connected with the second secondary winding 727b.

[0265] As shown in Figure 1 , Figure 35a and Figure 36bAs shown, the second output terminal 74 is rectangular plate body. The second output terminal 74 comprises a first connecting surface 741, a second connecting surface 742, a third connecting surface 743, a fourth connecting surface 744, a fifth connecting surface 745 and a sixth connecting surface 746. In the Z-axis direction, the first connecting surface 741 and the second connecting surface 742 are oppositely arranged and parallel. In the X-axis direction, the third connecting surface 743 and the fourth connecting surface 744 are oppositely arranged and parallel. The third connecting surface 743 and the fourth connecting surface 744 are connected between the first connecting surface 741 and the second connecting surface 742, and are perpendicular to the first connecting surface 741 and the second connecting surface 742. In the Y-axis direction, the fifth connecting surface 745 and the sixth connecting surface 746 are oppositely arranged and parallel. The fifth connecting surface 745 and the sixth connecting surface 746 are connected between the first connecting surface 741 and the second connecting surface 742, and are connected between the third connecting surface 743 and the fourth connecting surface 744. The fifth connecting surface 745 and the sixth connecting surface 746 are perpendicular to the first connecting surface 741, the second connecting surface 742, the third connecting surface 743 and the fourth connecting surface 744.

[0266] The second output terminal 74 is connected to the second rectifier sub-module 73 by means including but not limited to welding, gluing and the like. Specifically, the sixth connecting surface 746 is opposite to and connected to the fifth fixed connecting surface 735 of the second rectifier sub-module 73. The fifth connecting surface 745 is opposite to the fifth fixed connecting surface 735. The first connecting surface 741 is between the first fixed connecting surface 731 and the second fixed connecting surface 732 of the second rectifier sub-module 73, and is spaced from the first fixed connecting surface 731 and the second fixed connecting surface 732. The second connecting surface 742 is between the first connecting surface 741 and the second fixed connecting surface 732, and is spaced from the first connecting surface 741 and the second fixed connecting surface 732. The third connecting surface 743 is between the third fixed connecting surface 733 and the fourth fixed connecting surface 734 of the second rectifier sub-module 73, and is spaced from the third fixed connecting surface 733 and the fourth fixed connecting surface 734. The fourth connecting surface 744 is between the third connecting surface 743 and the fourth fixed connecting surface 734, and is spaced from the third connecting surface 743 and the fourth fixed connecting surface 734.

[0267] Please refer again to Figure 34 , and combine Figure 30 , Figure 35a and Figure 36 . As Figure 34As shown, the exemplary second heat dissipation sub-module 75 is a rectangular plate. The second heat dissipation sub-module 75 includes a plurality of fans, which are not specifically limited in the present application. The second heat dissipation sub-module 75 includes a first mounting and connecting layer 751, a second mounting and connecting layer 752, a third mounting and connecting layer 753, a fourth mounting and connecting layer 754, a fifth mounting and connecting layer 755, and a sixth mounting and connecting layer 756. In the Z-axis direction, the first mounting and connecting layer 751 is arranged opposite to the second mounting and connecting layer 752 and parallel to the second mounting and connecting layer 752. In the X-axis direction, the third mounting and connecting layer 753 is arranged opposite to the fourth mounting and connecting layer 754 and parallel to the fourth mounting and connecting layer 754. The third mounting and connecting layer 753 and the fourth mounting and connecting layer 754 are connected between the first mounting and connecting layer 751 and the second mounting and connecting layer 752 and arranged perpendicular to the first mounting and connecting layer 751 and the second mounting and connecting layer 752. In the Y-axis direction, the fifth mounting and connecting layer 755 is arranged opposite to the sixth mounting and connecting layer 756 and parallel to the sixth mounting and connecting layer 756. The fifth mounting and connecting layer 755 and the sixth mounting and connecting layer 756 are connected between the first mounting and connecting layer 751 and the second mounting and connecting layer 752 and connected between the third mounting and connecting layer 753 and the fourth mounting and connecting layer 754. The fifth mounting and connecting layer 755 and the sixth mounting and connecting layer 756 are arranged perpendicular to the first mounting and connecting layer 751, the second mounting and connecting layer 752, the third mounting and connecting layer 753, and the fourth mounting and connecting layer 754.

[0268] In some embodiments, the second heat dissipation sub-module 75 is provided with a plurality of assembly holes 757. Each assembly hole 757 extends along the Z-axis direction and has two openings. One opening is located on the first mounting and connecting layer 751, and the other opening is located on the second mounting and connecting layer 752. Exemplarily, the number of assembly holes 757 is two. The two assembly holes 757 are respectively a first assembly hole 757a and a second assembly hole 757b. In the X-axis direction, the second assembly hole 757b and the first assembly hole 757a are arranged in a straight line and spaced apart.

[0269] As Figure 30 , Figure 34 and Figure 35aAs shown, the second heat dissipation sub-module 75 is fixedly connected with the second support 60. The second heat dissipation sub-module 75 is fixedly connected with the first matching support part 61. Specifically, the second installation and connection surface 752 of the second heat dissipation sub-module 75 is opposite to and in contact with the first support surface 611 of the first matching support part 61. The first installation and connection surface 751 of the second heat dissipation sub-module 75 is away from the first support surface 611. The third installation and connection surface 753 of the second heat dissipation sub-module 75 is opposite to and spaced from the first surface 621 of the second matching support part 62. The fourth installation and connection surface 754 of the second heat dissipation sub-module 75 is opposite to and spaced from the fourth surface 631 of the third matching support part 63. The fifth installation and connection surface 755 of the second heat dissipation sub-module 75 is opposite to and spaced from the sixth installation wall surface 716 of the second receiving sub-module 71. The sixth installation and connection surface 756 of the second heat dissipation sub-module 75 is away from the sixth installation wall surface 716.

[0270] The first assembly hole 757a of the second heat dissipation sub-module 75 is matched with the twelfth fixed hole 64l of the first matching support part 61. The second assembly hole 757b of the second heat dissipation sub-module 75 is matched with the thirteenth fixed hole 64m of the first matching support part 61. Through a plurality of fasteners (screws, pins or screws), the second heat dissipation sub-module 75 is fixedly connected with the first matching support part 61, and the second heat dissipation sub-module 75 is located on the side of the second receiving sub-module 71 away from the second conversion sub-module 72 and is spaced from the second receiving sub-module 71. The specific connection mode can refer to the related description of the second receiving sub-module 71, and thus will not be described again. Among them, in the Y-axis direction, compared with the spacing between the second receiving sub-module 71 and the second conversion sub-module 72 and the spacing between the second conversion sub-module 72 and the second rectification sub-module 73, the spacing between the second heat dissipation sub-module 75 and the second receiving sub-module 71 is larger. The second heat dissipation sub-module 75 is electrically connected with the second rectification sub-module 73.

[0271] As shown in Figure 35a and Figure 36 , it can be understood that the second power module 70 is fixedly connected to the surface of the first matching support part 61. Specifically, the second power module 70 is fixedly connected to the first support surface 611 of the first matching support part 61. The second power module 70 is fixedly connected to the surface of the first matching support part 61 away from the second power layer 66. In other words, the surface of the first matching support part 61 away from the second power module 70 is provided with the second power layer 66. The first power layer 65 is electrically connected with the second power module 70.

[0272] Please refer to Figure 37 , Figure 38 , Figure 39 and Figure 40 , and in combination with Figure 2 , Figure 3 , Figure 23 ,Figure 35 and Figure 35a , Figure 37 is Figure 2 partial structural schematic view of the power module 102 from another angle. Figure 38 is Figure 2 partial cross-sectional view of the power module 102 along the line L11-L11. Figure 39 is Figure 2 cross-sectional view of the power module 102 along the line L12-L12. Figure 40 is Figure 2 partial cross-sectional view of the power module 102 along the line L13-L13.

[0273] As shown in Figure 2 , Figure 37 and Figure 38 , the second sub-module 3 is buckled and fixedly connected with the first sub-module 1 by means of including but not limited to welding or gluing, for example. The insulating member 2 is fixedly connected between the first power module 40 and the second power module 70. The insulation between the first power module 40 and the second power module 70 is achieved by the insulating member 2, which is conducive to reducing the spacing between the first power module 40 and the second power module 70 and facilitating the miniaturized design of the power module 102.

[0274] Specifically, the third matching surface 522 of the second matching connecting part 52 of the second shell 50 is opposite to and connected with the fifth surface 132 of the third connecting part 13 of the first shell 10; the fifth matching surface 532 of the third matching connecting part 53 of the second shell 50 is opposite to and connected with the third surface 122 of the second connecting part 12 of the first shell 10. The second matching connecting part 52 is fixedly connected with the third connecting part 13. The third matching connecting part 53 is fixedly connected with the second connecting part 12. The second shell 50 is buckled and fixedly connected with the first shell 10. The second shell 50 and the first shell 10 form a containing space in cooperation, and the insulating member 2, the first supporting member 20, the input module 30, the first power module 40, the second supporting member 60 and the second power module 70 are all contained in the containing space.

[0275] The third layer surface 623 of the second matching supporting part 62 of the second supporting member 60 is opposite to and connected with the sixth wall surface 233 of the third supporting part 23 of the first supporting member 20, and is opposite to and connected with the first supporting wall surface 241 of the containing part 24 of the first supporting member 20. The sixth layer surface 633 of the third matching supporting part 63 of the second supporting member 60 is opposite to and connected with the third wall surface 223 of the second supporting part 22 of the first supporting member 20. The second matching supporting part 62 is fixedly connected with the third supporting part 23 and the containing part 24, and the third matching supporting part 63 is fixedly connected with the second supporting part 22. The second supporting member 60 is buckled and fixedly connected with the first supporting member 20.

[0276] In this way, through the fixed connection between the second mating support 62 and the third support 23 and the receiving part 24, and the fixed connection between the third mating support 63 and the second support 22, the second support member 60 is fixedly connected to the first support member 20, and the second sub-module 3 is assembled with the first sub-module 1, the installation process is simplified, the installation time is reduced, and the assembly of the power module 102 is facilitated.

[0277] It can be understood that the first outer shell formed by the first housing 10 and the first support member 20, and the second outer shell formed by the second housing 50 and the second support member 60, constitute the main body of the power module 102. In other words, the power module 102 includes the main body of the outer shell, which includes the first outer shell and the second outer shell, and the first outer shell and the second outer shell are fastened and fixedly connected. The input module 30, the first power module 40, and the second power module 70 of the power module 102 are insulated and grounded through the main body of the outer shell.

[0278] It can be understood that the first support surface 211 and the second hole wall 2472 of the first support member 20 constitute the first inner wall surface of the outer casing body, and the first support surface 611 of the second support member 60 is the second inner wall surface of the outer casing body. In the Z-axis direction, the first inner wall surface and the second inner wall surface are spaced apart and opposite to each other. In other words, the outer casing body includes a first inner wall surface and a second inner wall surface, and in the thickness direction of the power module 102, the first inner wall surface and the second inner wall surface are spaced apart and opposite to each other.

[0279] In some other embodiments, the first housing 10 and the second housing 50 may also be integrally formed, and the first support member 20 and the second support member 60 may also be integrally formed, that is, the first outer shell and the second outer shell may also be integrally formed.

[0280] like Figure 35 , Figure 38 and Figure 39 As shown, the first mounting wall surface 711 of the second receiving submodule 71 is opposite to and connected to the first insulating surface 2a of the insulating member 2. The third mounting wall surface 713 of the second receiving submodule 71 is flush with the fourth connecting surface 414 of the first receiving submodule 41. The fourth mounting wall surface 714 of the second receiving submodule 71 is flush with the third connecting surface 413 of the first receiving submodule 41. The fifth mounting wall surface 715 of the second receiving submodule 71 is flush with the fifth connecting surface 415 of the first receiving submodule 41. The sixth mounting wall surface 716 of the second receiving submodule 71 is flush with the sixth connecting surface 416 of the first receiving submodule 41. The second receiving submodule 71 corresponds to the first receiving submodule 41. In the Z-axis direction, the projection of the second receiving submodule 71 completely overlaps with the projection of the first receiving submodule 41.

[0281] It should be noted that the second receiving sub-module 71 corresponds to the first receiving sub-module 41 means that the fifth mounting wall surface 715 of the second receiving sub-module 71 is flush with the fifth connecting surface 415 of the first receiving sub-module 41, and the sixth mounting wall surface 716 of the second receiving sub-module 71 is flush with the sixth connecting surface 416 of the first receiving sub-module 41.

[0282] In other embodiments, the third mounting wall surface 713 of the second receiving sub-module 71 can also not be flush with the fourth connecting surface 414 of the first receiving sub-module 41. The fourth mounting wall surface 714 of the second receiving sub-module 71 can also not be flush with the third connecting surface 413 of the first receiving sub-module 41. The projection of the second receiving sub-module 71 can also not completely overlap the projection of the first receiving sub-module 41.

[0283] It can be understood that the first receiving sub-module 41 and the second receiving sub-module 71 meet the insulation requirements through the insulating member 2. Among them, the second receiving sub-module 71 and the first receiving sub-module 41 are electrically connected through a mode including but not limited to a cable, and the second rectifying unit 717 of the second receiving sub-module 71 is electrically connected with the first rectifying unit 417 of the first receiving sub-module 41. Specifically, the second rectifying unit 717 and the first rectifying unit 417 are connected in series. The output alternating current transmitted from the input terminal 32 of the input module 30 to the first rectifying unit 417 is transmitted to the second rectifying unit 717 through the first rectifying unit 417. The second rectifying unit 717 is used for rectifying the output alternating current to output the second direct current. Among them, the second direct current is a medium voltage direct current. The second direct current is transmitted from the second rectifying unit 717 to the second inverter unit 717a, and the second inverter unit 717a is used for inverting the second direct current to output the third alternating current. Among them, the third alternating current is a high-frequency medium voltage alternating current, and the frequency of the third alternating current is greater than the frequency of the output alternating current. It can be understood that the second receiving sub-module 71 is used for processing the output alternating current to output the third alternating current. Among them, the third alternating current is a high-frequency medium voltage alternating current, and the frequency of the third alternating current is greater than the frequency of the output alternating current.

[0284] Since the output alternating current is a medium voltage current, the processing difficulty and processing cost of medium and high voltage electronic devices that can withstand medium voltage current are high, and medium and high voltage electronic devices are difficult to obtain. The design of the series connection of the second rectifying unit 717 and the first rectifying unit 417 forms a medium and high voltage device through the first rectifying unit 417 and the second rectifying unit 717, so that the second rectifying unit 717 and the first rectifying unit 417 can receive the output alternating current, which is conducive to reducing the difficulty of obtaining medium and high voltage electronic devices and reducing the processing cost.

[0285] Since the second receiving sub-module 71 is electrically connected with the first energized layer 65, the current transmitted in the second receiving sub-module 71 is medium voltage current (including output alternating current, second direct current and third alternating current), and the first energized layer 65 is connected with medium voltage potential. Since the second energized layer 66 is connected with PE potential. In this way, the insulation mode of the second receiving sub-module 71 on the ground side is equivalent to pure solid insulation, and the electric field is entirely on the first matching support part 61 of the second support 60, and the air around the second receiving sub-module 71 does not bear the electric field. In this way, not only the insulation effect is strong, and the insulation requirement of the second receiving sub-module 71 on the ground side is realized, but also the thickness size (the size in the Z-axis direction) of the first matching support part 61 can be designed to be smaller, which is conducive to reducing the volume of the second sub-module 3, and conducive to the miniaturization design of the second sub-module 3 and the power module 102, and further conducive to the miniaturization design of the transformer 100.

[0286] As shown in Figure 35 , Figure 39 and Figure 40 , the first matching connection wall 721 of the second conversion sub-module 72 is opposite to and connected with the first insulation surface 2a of the insulation 2. The third matching connection wall 723 of the second conversion sub-module 72 is located on the side of the fourth matching connection surface 424 of the first conversion sub-module 42 away from the third matching connection surface 423, and is spaced from the fourth matching connection surface 424. The fourth matching connection wall 724 of the second conversion sub-module 72 is flush with the third matching connection surface 423 of the first conversion sub-module 42. The fifth matching connection wall 725 of the second conversion sub-module 72 is flush with the fifth matching connection surface 425 of the first conversion sub-module 42. The sixth matching connection wall 726 of the second conversion sub-module 72 is flush with the sixth matching connection surface 426 of the first conversion sub-module 42. The second conversion sub-module 72 corresponds to the first conversion sub-module 42. In the Z-axis direction, the projection of the first conversion sub-module 42 is located inside the projection of the second conversion sub-module 72.

[0287] It should be noted that the correspondence between the second conversion sub-module 72 and the first conversion sub-module 42 means that the fifth matching connection wall 725 of the second conversion sub-module 72 is flush with the fifth matching connection surface 425 of the first conversion sub-module 42, and the sixth matching connection wall 726 of the second conversion sub-module 72 is flush with the sixth matching connection surface 426 of the first conversion sub-module 42.

[0288] In other embodiments, the third matching connection wall 723 of the second conversion sub-module 72 can also be flush with the fourth matching connection surface 424 of the first conversion sub-module 42. The fourth matching connection wall 724 of the second conversion sub-module 72 can also not be flush with the third matching connection surface 423 of the first conversion sub-module 42. The projection of the second conversion sub-module 72 and the projection of the first conversion sub-module 42 also completely overlap.

[0289] Wherein, in the Z-axis direction, the second input part 726a of the second conversion sub-module 72 overlaps with the first input part 426a of the first conversion sub-module 42; the second output part 726b of the second conversion sub-module 72 overlaps with the first output part 426b of the first conversion sub-module 42. The second transformation boundary 726c of the second conversion sub-module 72 is flush with the first transformation boundary 426c of the first conversion sub-module 42.

[0290] The third alternating current output from the second inversion unit 717a is transmitted to the second input part 726a. According to the third alternating current, the second output part 726b couples to output the fourth alternating current. Wherein, the voltage of the fourth alternating current is less than the voltage of the third alternating current, and the fourth alternating current is a low-voltage alternating current. Specifically, the third alternating current output from the second inversion unit 717a is transmitted to the second primary winding 727a. According to the principle of electromagnetic induction, the second secondary winding 727b couples to output the fourth alternating current according to the third alternating current. It can be understood that the first conversion sub-module 42 is used to perform voltage transformation processing on the third alternating current output by the second receiving sub-module 71 to output the fourth alternating current. Wherein, the voltage of the fourth alternating current is less than the voltage of the third alternating current, and the fourth alternating current is a low-voltage alternating current. It can be understood that the first conversion sub-module 42 and the second conversion sub-module 72 achieve insulation requirements through the insulating member 2.

[0291] The design of the second receiving sub-module 71 corresponding to the first receiving sub-module 41 and the second conversion sub-module 72 corresponding to the first conversion sub-module 42 can avoid the intersection of the electric field of the second conversion sub-module 72 and the electric field of the first receiving sub-module 41, and the intersection of the electric field of the second receiving sub-module 71 and the electric field of the first conversion sub-module 42, which is conducive to improving the insulation effect, reducing the thickness size (the size in the Z-axis direction) of the insulating member 2, reducing the spacing between the first receiving sub-module 41 and the first conversion sub-module 42, reducing the spacing between the second receiving sub-module 71 and the second conversion sub-module 72, and further facilitating the miniaturization design of the power module 102 and the transformer 100.

[0292] As Figure 13b , Figure 23 and Figure 39As shown, since the first transformer boundary 426c of the first conversion submodule 42 is flush with the mating end face 296 of the fourth conductive layer 29, the second transformer boundary 726c of the second conversion submodule 72 is flush with the first transformer boundary 426c of the first conversion submodule 42, and the second transformer boundary 726c is flush with the mating end face 296 of the fourth conductive layer 29. This avoids the intersection of the medium-voltage electric field of the first input portion 426a of the first conversion submodule 42 and the low-voltage electric field of the second output portion 726b of the second conversion submodule 72, avoids the intersection of the low-voltage electric field of the first output portion 426b of the first conversion submodule 42 and the medium-voltage electric field of the second input portion 726a of the second conversion submodule 72, and avoids the low-voltage electric field of the first output portion 426b of the first conversion submodule 42 and the input fuse 33 (e.g., Figure 40 The medium-voltage electric fields (as shown) intersect. This is beneficial for reducing the electric field at the interface, improving the insulation effect, reducing the thickness (dimension in the Z-axis direction) of the insulating component 2, reducing the volume of the power module 102, and thus facilitating the miniaturization design of the power module 102 and the transformer 100.

[0293] like Figure 35 , Figure 37 and Figure 39 As shown, the first fixed connection wall 731 of the second rectifier submodule 73 is opposite to and connected to the first insulating surface 2a of the insulating member 2. The third fixed connection wall 733 of the second rectifier submodule 73 is located on the side of the fourth fixed connection surface 434 of the first rectifier submodule 43 facing away from the third fixed connection surface 433, and is spaced apart from the third fixed connection surface 433. The fourth fixed connection wall 734 of the second rectifier submodule 73 is flush with the third fixed connection surface 433 of the first rectifier submodule 43. The fifth fixed connection wall 735 of the second rectifier submodule 73 is flush with the fifth fixed connection surface 435 of the first rectifier submodule 43. The sixth fixed connection wall 736 of the second rectifier submodule 73 is flush with the sixth fixed connection surface 436 of the first rectifier submodule 43. The second rectifier submodule 73 corresponds to the first rectifier submodule 43. In the Z-axis direction, the projection of the first rectifier submodule 43 is located inside the projection of the second rectifier submodule 73.

[0294] It should be noted that the correspondence between the second rectifier submodule 73 and the first rectifier submodule 43 means that the fifth fixed connection wall surface 735 of the second rectifier submodule 73 is flush with the fifth fixed connection surface 435 of the first rectifier submodule 43, and the sixth fixed connection wall surface 736 of the second rectifier submodule 73 is flush with the sixth fixed connection surface 436 of the first rectifier submodule 43.

[0295] In some other embodiments, the third fixed connection wall surface 733 of the second rectifier sub-module 73 can also be flush with the fourth fixed connection surface 434 of the first rectifier sub-module 43. The fourth fixed connection wall surface 734 of the second rectifier sub-module 73 can also not be flush with the third fixed connection surface 433 of the first rectifier sub-module 43. In the Z-axis direction, the projection of the first rectifier sub-module 43 and the projection of the second rectifier sub-module 73 can also completely overlap.

[0296] The fourth alternating current output from the second secondary winding 727b is transmitted to the second rectifier sub-module 73, and the second rectifier sub-module 73 is configured to rectify the fourth alternating current to output the second output direct current. That is, the fourth alternating current output from the second conversion sub-module 72 is transmitted to the second rectifier sub-module 73, and the second rectifier sub-module 73 is configured to rectify the fourth alternating current to output the second output direct current.

[0297] It should be noted that since the second receiving sub-module 71 transmits a medium-voltage current and the second rectifier sub-module 73 transmits a low-voltage current, a high insulation requirement needs to be achieved between the second receiving sub-module 71 and the second rectifier sub-module 73, that is, a high insulation requirement needs to be achieved between the medium-voltage side and the low-voltage side. It can be understood that in the present embodiment, the second receiving sub-module 71 and the second rectifier sub-module 73 achieve the insulation requirement through the second conversion sub-module 72, so as to facilitate reducing the spacing between the second receiving sub-module 71 and the second rectifier sub-module 73, facilitating reducing the size of the second power module 70, facilitating the miniaturization design of the second sub-module 3, and further facilitating the miniaturization design of the power module 102 and the transformer 100.

[0298] The design that the second conversion sub-module 72 corresponds to the first conversion sub-module 42 and the second rectifier sub-module 73 corresponds to the first rectifier sub-module 43 can avoid the intersection of the electric field of the second conversion sub-module 72 and the electric field of the first rectifier sub-module 43, and avoid the intersection of the electric field of the second rectifier sub-module 73 and the electric field of the first conversion sub-module 42, which is conducive to improving the insulation effect, reducing the thickness size (the size in the Z-axis direction) of the insulation piece 2, reducing the spacing between the first conversion sub-module 42 and the first rectifier sub-module 43, reducing the spacing between the second conversion sub-module 72 and the second rectifier sub-module 73, and further facilitating the miniaturization design of the power module 102 and the transformer 100.

[0299] As Figure 2 , Figure 3 and Figure 39As shown, the first connection layer 741 of the second output terminal 74 is opposite to and spaced from the first connection wall 441 of the first output terminal 44. The third connection layer 743 of the second output terminal 74 is flush with the fourth connection wall 444 of the first output terminal 44. The fourth connection layer 744 of the second output terminal 74 is flush with the third connection wall 443 of the first output terminal 44. The fifth connection layer 745 of the second output terminal 74 is flush with the fifth connection wall 445 of the first output terminal 44. The sixth connection layer 746 of the second output terminal 74 is flush with the sixth connection wall 446 of the first output terminal 44.

[0300] This facilitates the connection between the second output terminal 74 and the first output terminal 44 and the load device 300 (e.g., ...). Figure 1 (As shown) Electrical connection, reducing the complexity of the electrical connection between power module 102 and load device 300, making it simple and aesthetically pleasing. The second output DC power from the second rectifier submodule 73 is delivered to the load device 300 (e.g., as shown) through the first output terminal 44. Figure 1 As shown, the power module 102 outputs a first output DC power and a second output DC power to the load device 300 through the first output terminal 44 and the second output terminal 74, respectively, to supply the load device 300.

[0301] like Figure 23 , Figure 35a and Figure 39 As shown, the first mounting connection layer 751 of the second heat dissipation submodule 75 is opposite to and connected to the first insulating surface 2a of the insulating member 2. The third mounting connection layer 753 of the second heat dissipation submodule 75 is flush with the fourth mounting connection wall 454 of the first heat dissipation submodule 45. The fourth mounting connection layer 754 of the second heat dissipation submodule 75 is flush with the third mounting connection wall 453 of the first heat dissipation submodule 45. The fifth mounting connection layer 755 of the second heat dissipation submodule 75 is flush with the fifth mounting connection wall 455 of the first heat dissipation submodule 45. The sixth mounting connection layer 756 of the second heat dissipation submodule 75 is flush with the sixth mounting connection wall 456 of the first heat dissipation submodule 45. The second heat dissipation submodule 75 corresponds to the first heat dissipation submodule 45. In the Z-axis direction, the projection of the second heat dissipation submodule 75 completely overlaps with the projection of the first heat dissipation submodule 45.

[0302] It should be noted that the second heat dissipation submodule 75 corresponds to the first heat dissipation submodule 45, meaning that the fifth mounting connection layer 755 of the second heat dissipation submodule 75 is flush with the fifth mounting connection wall 455 of the first heat dissipation submodule 45, and the sixth mounting connection layer 756 of the second heat dissipation submodule 75 is flush with the sixth mounting connection wall 456 of the first heat dissipation submodule 45.

[0303] In some other embodiments, the third mounting connection layer 753 of the second heat dissipation submodule 75 and the fourth mounting connection wall 454 of the first heat dissipation submodule 45 may not be flush. The fourth mounting connection layer 754 of the second heat dissipation submodule 75 and the third mounting connection wall 453 of the first heat dissipation submodule 45 may also not be flush. In the Z-axis direction, the projection of the second heat dissipation submodule 75 and the projection of the first heat dissipation submodule 45 may not completely overlap.

[0304] like Figure 35 , Figure 35a and Figure 39 As shown, the second output DC power from the second rectifier submodule 73 can be supplied to the second heat dissipation submodule 75. The second heat dissipation submodule 75 is used to dissipate heat from the second power module 70. This prevents the temperature of the second power module 70 from rising too high during operation, which is beneficial for the long-term operation of the second power module 70, and consequently for the long-term operation of the second submodule 3 and the power module 102, extending the service life of the power module 102 and improving its safety.

[0305] It should be noted that since the second heat dissipation submodule 75 transmits the second output DC power (specifically, low-voltage DC power), and the second receiving submodule 71 transmits medium-voltage current, a high level of insulation is required between the second heat dissipation submodule 75 and the second receiving submodule 71. The design of a larger distance between the second heat dissipation submodule 75 and the second receiving submodule 71 in the Y-axis direction ensures that the second heat dissipation submodule 75 and the second receiving submodule 71 are insulated from the first heat dissipation submodule 45 by the insulating component 2.

[0306] The design of the second receiving submodule 71 corresponding to the first receiving submodule 41 and the second heat dissipation submodule 75 corresponding to the first heat dissipation submodule 45 can avoid the electric field of the second receiving submodule 71 from intersecting with the electric field of the first heat dissipation submodule 45, thus improving the insulation effect, reducing the thickness (Z-axis dimension) of the insulating component 2, reducing the distance between the first receiving submodule 41 and the first heat dissipation submodule 45, and reducing the distance between the second receiving submodule 71 and the second heat dissipation submodule 75, thereby facilitating the miniaturization design of the power module 102 and the transformer 100.

[0307] It can be understood that the second power module 70 is located on the side of the insulating member 2 facing away from the first power module 40, and the insulating member 2 is sandwiched between the first power module 40 and the second power module 70. The second power module 70 and the first power module 40 are insulated from each other by the insulating member 2.

[0308] As shown in Figure 1 , Figure 23 and Figure 35a , the power module 102 provided by the present application receives output alternating current (the output alternating current can be medium-voltage alternating current or high-voltage alternating current) through the input module 30 of the first sub-module 1. The output alternating current is transmitted from the input module 30 to the first receiving sub-module 41 of the first power module 40. After being processed by the first receiving sub-module 41, the first conversion sub-module 42 and the first rectifying sub-module 43 in turn, the first rectifying sub-module 43 can output the first output direct current (low-voltage current) to the load device 300 through the first output terminal 44, so as to supply the load device 300. The first rectifying sub-module 43 can also output the first output direct current to the first heat dissipation sub-module 45, so as to supply the first heat dissipation sub-module 45 and achieve heat dissipation of the first sub-module 1.

[0309] The first power module 40 and the input module 30 of the first sub-module 1 are grounded through the first shell 10 and are insulated from the first shell 10 through the first support 20. The input module 30 and the first power module 40 achieve pure solid insulation on the ground side through the first outer shell (including the first shell 10 and the first support 20).

[0310] The second receiving sub-module 71 of the second sub-module 3 is electrically connected with the first receiving sub-module 41. The second receiving sub-module 71 receives the output alternating current transmitted from the input module 30 through the first receiving sub-module 41. After being processed by the second receiving sub-module 71, the second conversion sub-module 72 and the second rectifying sub-module 73 in turn, the second rectifying sub-module 73 can output the second output direct current (low-voltage current) to the load device 300 through the second output terminal 74, so as to supply the load device 300. The second rectifying sub-module 73 can also output the second output direct current to the second heat dissipation sub-module 75, so as to supply the second heat dissipation sub-module 75 and achieve heat dissipation of the second sub-module 3. The second power module 70 receives the output alternating current transmitted from the input module 30 through the first power module 40. After being processed by the second power module 70, the second power module 70 can output the second output direct current (low-voltage current) to the load device 300, so as to supply the load device 300. The second power module 70 of the second sub-module 3 is grounded through the second shell 50 and is insulated from the second shell 50 through the second support 60. The second power module 70 achieves pure solid insulation on the ground side through the second outer shell (including the second shell 50 and the second support 60).

[0311] Since the input module 30 and the first power module 40 realize the pure solid insulation on the ground side through the first outer shell, the second power module 70 realizes the pure solid insulation on the ground side through the second outer shell. In this way, unlike the air insulation mode of the prior art, that is, without the need to realize air insulation through a larger spacing meeting the insulation requirements, not only the insulation effect is strong, but also the volume of the first outer shell and the second outer shell can be designed to be very small, which is conducive to reducing the volume of the first sub-module 1 and the second sub-module 3, and is conducive to the miniaturization design of the first sub-module 1 and the second sub-module 3, and further is conducive to the miniaturization design of the power module 102. In addition, the power module 102 only needs to be fixedly connected through the first outer shell and the second outer shell to form a whole, and the structure is simple and stable, which simplifies the installation process of the power module 102 and is convenient for installation.

[0312] The above is only part of the embodiments and implementation manners of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power module, characterized in that, The power module includes: The outer casing body includes a first inner wall surface and a second inner wall surface, wherein the first inner wall surface and the second inner wall surface are spaced apart from each other in the thickness direction of the power module. An input module, wherein the input module is fixedly connected to the first inner wall surface of the outer shell body; A first power module, which is fixedly connected to the first inner wall surface of the outer casing and connected to the input module; and The second power module is fixedly connected to the second inner wall surface of the outer shell body. In the thickness direction of the power module, the second power module is spaced apart from and electrically connected to the first power module. The second power module partially overlaps with and is spaced apart from the input module. The input module, the first power module, and the second power module are grounded and insulated through the outer shell body. The outer casing body includes a first outer casing, the first outer casing includes a first housing and a first support member, the first support member includes a first support portion, the first support portion is stacked with the first housing, the input module and the first power module are fixedly connected to the surface of the first support portion facing away from the first housing, the first support portion is provided with a first conductive layer inside, the first conductive layer is electrically connected to the first power module, and a second conductive layer is provided between the first support portion and the first housing.

2. The power module according to claim 1, characterized in that, The power module includes an insulating component, which is fixedly connected between the first power module and the second power module.

3. The power module according to claim 1 or 2, characterized in that, The main body of the housing includes a second housing, the second power module is fixedly connected to the second housing, the second housing is fastened and fixedly connected to the first housing, and in the thickness direction of the power module, the second power module and the first power module are located between the first housing and the second housing, and the second power module is grounded and insulated through the second housing.

4. The power module according to claim 3, characterized in that, The first support member includes a receiving portion, which is fixedly connected to the first support member. The receiving portion has a receiving hole, and the input module is at least partially received in the receiving hole. The interior of the receiving portion is provided with a third conductive layer, which surrounds the receiving hole and is electrically connected to the input module. The outer surface of the receiving portion is provided with a fourth conductive layer, which surrounds the receiving portion and is electrically connected to the first housing.

5. The power module according to claim 4, characterized in that, The first power module includes a first receiving submodule, a first conversion submodule, and a first rectifier submodule. The first receiving submodule, the first conversion submodule, and the first rectifier submodule are arranged in sequence at intervals and electrically connected in sequence. The first receiving submodule is located at one end of the receiving portion and is connected to the input module. The first receiving submodule is electrically connected to the first conductive layer.

6. The power module according to claim 5, characterized in that, The first conversion submodule and the first rectification submodule are located on the side of the first receiving submodule facing the receiving part, and the first conversion submodule and the first rectification submodule are located on the side of the receiving part, and are all spaced apart from the receiving part.

7. The power module according to claim 6, characterized in that, The fourth conductive layer includes a mating end face. The first conversion submodule includes a first input portion and a first output portion. The first output portion is coupled to the first input portion. A first transformer boundary exists between the first input portion and the first output portion. The first transformer boundary is flush with the mating end face. The first input portion is located on the side of the first output portion facing the first receiving submodule and is electrically connected to the first receiving submodule. The first output portion is electrically connected to the first rectifier submodule.

8. The power module according to claim 6, characterized in that, The first receiving submodule includes a first rectifier unit and a first inverter unit. The first rectifier unit is connected to the first inverter unit, and the first inverter unit is electrically connected to the first conversion submodule. The first rectifier unit is provided with a mating slot, and the input module is inserted into the mating slot and electrically connected to the first rectifier unit.

9. The power module according to any one of claims 4 to 8, characterized in that, The input module includes a connector, an input terminal, and an input fuse. The connector is fixedly connected to the receiving hole. The input terminal is located on one side of the connector and connected to the connector, and is received in the receiving hole. The input fuse is located on the other side of the connector and connected to the connector, and is at least partially received in the receiving hole. The input terminal is electrically connected to the third conductive layer. The input fuse is electrically connected to the first power module and electrically connected to the third conductive layer.

10. The power module according to any one of claims 5 to 8, characterized in that, The second outer casing includes a second housing and a second support member. The second support member is connected to the second housing. The second power module is located on the side of the second support member facing away from the second housing and is fixedly connected to the second support member. The second support member is used to insulate the second power module from the second housing. The second housing is fastened to the first housing and is fixedly connected to the first housing. The second support member is fastened to the first support member and is fixedly connected to the first support member.

11. The power module according to claim 10, characterized in that, The second support member includes a first mating support portion, the second power module is fixedly connected to the surface of the first mating support portion, the first mating support portion has a first power-conducting layer inside, the first power-conducting layer is electrically connected to the second power module, the surface of the first mating support portion facing away from the second power module has a second power-conducting layer, the first mating support portion is stacked with the second housing, and the second power-conducting layer is located between the first mating support portion and the second housing.

12. The power module according to claim 11, characterized in that, The second power module includes a second receiving submodule, a second conversion submodule, and a second rectifier submodule. The second receiving submodule, the second conversion submodule, and the second rectifier submodule are arranged at intervals and electrically connected in sequence. The second receiving submodule is electrically connected to the first power-conducting layer and is also electrically connected to the first receiving submodule, and corresponds to the first receiving submodule. The second conversion submodule corresponds to the first conversion submodule, and the second rectifier submodule corresponds to the first rectifier submodule.

13. The power module according to claim 12, characterized in that, The second receiving submodule includes a second rectifier unit and a second inverter unit. The second rectifier unit is connected to the second inverter unit, the second inverter unit is electrically connected to the second conversion submodule, and the second rectifier unit is electrically connected to the first power module.

14. The power module according to claim 12, characterized in that, The first power module includes a first output terminal, which is located on the side of the first rectifier submodule facing away from the first conversion submodule and is connected to the first rectifier submodule. The second power module includes a second output terminal, which is located on the side of the second rectifier submodule facing away from the second conversion submodule and is connected to the second rectifier submodule. The second output terminal corresponds to the first output terminal.

15. The power module according to claim 12, characterized in that, The first power module includes a first heat dissipation submodule, which is located on the side of the first receiving submodule facing away from the first conversion submodule, and is spaced apart from the first receiving submodule, and is electrically connected to the first rectifier submodule. The second power module includes a second heat dissipation submodule, which is located on the side of the second receiving submodule facing away from the second conversion submodule and is spaced apart from the second receiving submodule. It is also electrically connected to the second rectifier submodule. The second heat dissipation submodule corresponds to the first heat dissipation submodule.

16. The power module according to any one of claims 11 to 15, characterized in that, The first support member includes a second support portion and a third support portion. The second support portion is fixedly connected to the side of the first support portion facing away from the receiving portion. The third support portion is fixedly connected to the side of the first support portion facing away from the second support portion and is fixedly connected to one end of the receiving portion. The second support member includes a second mating support portion and a third mating support portion. The second mating support portion and the third mating support portion are fixedly connected to both sides of the first mating support portion. The second mating support portion is fixedly connected to the third support portion and the receiving portion. The third mating support portion is fixedly connected to the second support portion.

17. A transformer, characterized in that, It includes a plurality of power modules and a main housing as described in any one of claims 1 to 16, wherein the plurality of power modules are housed in the main housing.

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