Power module

Abstract

The invention provides a power module, which comprises a first side plate, a second side plate and an insulating plate, and is characterized in that the insulating plate comprises a flat plate part, one or more lug bosses and one or more communication bridges; the protruding part and / or the communication bridge protrude / protrudes in the third direction so as to form an insulation cavity. The insulating plate, the first side plate and the second side plate are combined to form a first accommodating space and a second accommodating space along a third direction, a first power device is arranged in the first accommodating space, and a second power device is arranged in the second accommodating space; the transformer comprises a magnetic core and a winding wound on the magnetic core, the winding comprises a first winding and a second winding, and at least part of the magnetic core is arranged in the insulation cavity or the communication bridge; the first winding is electrically connected with the first power device, and the second winding is electrically connected with the second power device. The flat plate part does not penetrate through the magnetic core air gap, so that the size of the magnetic core air gap is convenient to control, and the efficiency of a transformer in the power module is improved.

Description

Technical Field

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

[0002] With the development of social science and technology and economy, more and more emerging industries are becoming popular. For example, in the automotive industry, the demand for electric vehicles has gradually increased in recent years, and the production and sales of electric vehicles have continued to increase, with a trend of surpassing traditional vehicles. In terms of infrastructure, the country has included data centers in the scope of new infrastructure, and the construction of big data centers has accelerated in recent years. Whether it is the development of the electric vehicle industry or the construction of data centers, they are inseparable from basic supporting facilities. Among them, power supply equipment is the core component of supporting facilities. In the context of the continuous development of the industry, power supply equipment is also facing greater challenges and higher requirements.

[0003] In the related art, the power module includes a housing and a transformer and a voltage power device arranged in the housing, an insulating plate is arranged in the middle of the housing, the transformer includes a primary side unit and a secondary side unit, and the voltage power device includes a first power device and a second power device. The primary side unit and the secondary side unit are symmetrically arranged relative to the insulating plate; the first power device and the second power device are also symmetrically arranged relative to the insulating plate, and the first power device is electrically connected to the primary side unit, and the second power device is electrically connected to the secondary side unit.

[0004] However, with the solution of the related art, the efficiency of the transformer in the power module is low. Summary of the invention

[0005] In order to overcome the above-mentioned defects in the related art, the purpose of the present application is to provide a power module, which can improve the efficiency of the transformer in the power module.

[0006] The present application provides a power module, comprising:

[0007] a first side plate, a second side plate and an insulating plate, the insulating plate comprising a flat plate portion, one or more protruding portions and one or more connecting bridges, the flat plate portion being parallel to a plane formed by the first direction and the second direction; the protruding portions and / or the connecting bridges protrude along a third direction to form an insulating cavity; the insulating plate, the first side plate and the second side plate are combined to form a first accommodating space and a second accommodating space along the third direction, a first power device is arranged in the first accommodating space, and a second power device is arranged in the second accommodating space; and

[0008] A transformer, comprising a magnetic core and a winding wound on the magnetic core, the winding comprising a first winding and a second winding, at least a portion of the magnetic core is disposed in the insulating cavity or the connecting bridge; the first winding is electrically connected to the first power device, and the second winding is electrically connected to the second power device;

[0009] The first direction, the second direction and the third direction are perpendicular to each other.

[0010] In a possible implementation, at least part of the magnetic core is disposed in the insulating cavity, and part of the winding is disposed in the connecting bridge.

[0011] In a possible implementation manner, the magnetic core is provided with an opening along the first direction, and part of the connecting bridge is passed through the opening of the magnetic core.

[0012] In a possible implementation, one of the first winding and the second winding is directly wound on the magnetic core, and the other of the first winding and the second winding includes a first part and a second part that are electrically connected, the first part is located on a side of the protrusion away from the insulating cavity, and the second part is located in the connecting bridge.

[0013] In a possible implementation manner, the first part and the second part are integrally formed, a through hole is provided in the connecting bridge, and the second part is located in the through hole.

[0014] In a possible implementation, the second part and the connecting bridge are integrally formed, an end of the second part is located outside the connecting bridge, and an end of the first part is electrically connected to an end of the second part.

[0015] In one possible implementation, the magnetic core includes a first column and a second column extending along the third direction and a first column and a second column extending along the second direction, the first column, the first column, the second column and the second column are connected end to end in sequence, and the first column is located in the insulating cavity.

[0016] In a possible implementation manner, at least a portion of the magnetic core is disposed in the connecting bridge.

[0017] In a possible implementation, the magnetic core includes a first unit and a second unit, the first unit is located on a side of the protrusion away from the insulating cavity, and the second unit is inserted into the connecting bridge.

[0018] In a possible implementation, the first winding is wound on the first unit, the second winding is wound on the connecting bridge, the first winding is arranged in the first accommodating space, and the second winding is arranged in the second accommodating space.

[0019] In a possible implementation, the second winding is wound on the first unit, the first winding is wound on the connecting bridge, the first winding is arranged in the first accommodating space, and the second winding is arranged in the second accommodating space.

[0020] In a possible implementation manner, the connecting bridge is provided with a through hole along the first direction, and at least a portion of the magnetic core is passed through the through hole.

[0021] In a possible implementation manner, at least a portion of the magnetic core and the connecting bridge are formed integrally.

[0022] In a possible implementation manner, one of the first winding and the second winding is directly wound on the magnetic core located in the connecting bridge, and the other of the first winding and the second winding is wound on the connecting bridge.

[0023] In a possible implementation, the insulating plate includes a plurality of the protrusions and a plurality of the connecting bridges, and along the first direction, the plurality of the protrusions and the plurality of the connecting bridges form a plurality of the insulating cavities; the power module includes a plurality of the transformers, the plurality of the transformers correspond to the plurality of the insulating cavities, and the plurality of the transformers are connected in series or in parallel.

[0024] In a possible implementation manner, along the third direction, the distance between the connecting bridge and the flat plate portion is zero, and the protruding portion is arranged to protrude toward one side of the first accommodating space or the second accommodating space.

[0025] In a possible implementation manner, along the third direction, the distance between the protruding portion and the flat plate portion is zero, and the connecting bridge is protruded toward one side of the first accommodating space or the second accommodating space.

[0026] In a possible implementation manner, a semiconductive layer is provided on the surface of the insulating plate.

[0027] In a possible implementation manner, the material of the semiconductive layer includes graphene or carbon black.

[0028] In a possible implementation manner, openings are provided at two ends of the insulation cavity along the second direction.

[0029] In a possible implementation manner, a cover plate is further included, and in the third direction, the cover plate covers the second accommodating space, and the second power device includes a high-voltage power device.

[0030] In a possible implementation manner, parts of the first side panel and the second side panel located in the second accommodating space are double-layer structures.

[0031] In a possible implementation manner, the magnetic core is provided with an opening along the third direction, and part of the connecting bridge or the protrusion is passed through the opening of the magnetic core.

[0032] In a possible implementation, the insulating plate includes a plurality of the protrusions and a plurality of the connecting bridges, and the plurality of the protrusions and the plurality of the connecting bridges form at least two insulating cavities;

[0033] The magnetic core includes a first longitudinal column and a second longitudinal column extending along the first direction and a first transverse column and a second transverse column extending along the second direction. The first longitudinal column, the first transverse column, the second longitudinal column and the second transverse column are connected end to end in sequence, and the first transverse column and the second transverse column are respectively arranged in different insulating cavities.

[0034] In a possible implementation, the winding includes two first windings and two second windings, the two first windings are respectively wound around the first horizontal column and the second horizontal column, the two second windings each include a first part and a second part that are electrically connected, the first parts of the two second windings are respectively arranged on the side of the protrusion that forms the insulating cavity through which the first horizontal column and the second horizontal column are passed, away from the insulating cavity, and the second parts of the two second windings are respectively arranged in the connecting bridge that forms the insulating cavity through which the first horizontal column and the second horizontal column are passed; the two first windings are both arranged in the first accommodating space.

[0035] In a possible implementation, the winding includes two first windings and two second windings, the two second windings are respectively wound around the first horizontal column and the second horizontal column, the two first windings each include a first part and a second part that are electrically connected, the first parts of the two first windings are respectively arranged on the side of the protrusion that forms the insulating cavity through which the first horizontal column and the second horizontal column are penetrated, away from the insulating cavity, and the second parts of the two first windings are respectively arranged in the connecting bridge that forms the insulating cavity through which the first horizontal column and the second horizontal column are penetrated; the two second windings are both arranged in the first accommodating space.

[0036] The present application provides a power module, comprising a first side plate, a second side plate and an insulating plate, the insulating plate comprising a flat plate portion, one or more protruding portions and one or more connecting bridges, the flat plate portion is parallel to a plane formed by a first direction and a second direction; the protruding portion and / or the connecting bridge protrude along a third direction to form an insulating cavity; the insulating plate, the first side plate and the second side plate are combined to form a first accommodating space and a second accommodating space along the third direction, a first power device is arranged in the first accommodating space, and a second power device is arranged in the second accommodating space; and a transformer, the transformer comprising a magnetic core and a winding wound on the magnetic core, the winding comprising a first winding and a second winding, at least part of the magnetic core is arranged in the insulating cavity or the connecting bridge; the first winding is electrically connected to the first power device, and the second winding is electrically connected to the second power device; wherein the first direction, the second direction and the third direction are perpendicular to each other. The present application arranges at least part of the magnetic core in an insulating cavity or a connecting bridge so that the flat plate portion does not pass through the magnetic core air gap, thereby facilitating control of the size of the magnetic core air gap and facilitating improving the efficiency of the transformer in the power module; in addition, the raised portion or the connecting bridge arranged on the flat plate portion enables the insulating plate to form a bent structure, which is beneficial to improving the overall strength of the insulating plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 This is an external schematic diagram of a power module provided in one embodiment of the present application;

[0039] Figure 2 A simplified structural diagram of a power module provided in one embodiment of the present application;

[0040] Figure 3 A simplified structural diagram of an insulating plate provided in one embodiment of the present application;

[0041] Figure 4 A simplified structural diagram of an insulation board provided in another embodiment of the present application;

[0042] Figure 5 A simplified structural diagram of a transformer provided in one embodiment of the present application;

[0043] Figure 6 A simplified structural diagram of a transformer provided in another embodiment of the present application;

[0044] Figure 7 A simplified diagram of the connection structure of a transformer and an insulating plate provided in one embodiment of the present application;

[0045] Figure 8 A schematic diagram of the connection structure of a transformer and an insulating plate provided in another embodiment of the present application;

[0046] Fig. 9 A schematic diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application;

[0047] Fig.10 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application;

[0048] Fig.11 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application;

[0049] Fig.12 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application;

[0050] Fig.13 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application;

[0051] Fig.14 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application;

[0052] Fig.15 A simplified structural diagram of a power module provided in another embodiment of the present application;

[0053] Fig.16 A simplified structural diagram of a power module provided in yet another embodiment of the present application;

[0054] Fig.17 A simplified structural diagram of a transformer provided in yet another embodiment of the present application;

[0055] Fig.18 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application;

[0056] Fig.19 A simplified structural diagram of a magnetic core provided in yet another embodiment of the present application.

[0057] Reference numerals:

[0058] 11-first accommodating space; 12-second accommodating space; 13-first power device; 14-second power device; 15-cover plate; 16-fan;

[0059] 100 - insulating plate; 101 - first side plate; 102 - second side plate; 110 - flat plate portion; 120 - raised portion; 130 - connecting bridge; 140 - insulating cavity; 141 - first insulating cavity; 142 - second insulating cavity;

[0060] 200-transformer; 210-magnetic core; 211-first column; 212-second column; 213-first horizontal column; 214-second horizontal column; 215-first unit; 216-second unit; 217-first vertical column; 218-second vertical column; 220-first winding; 221-first part; 222-second part; 230-second winding;

[0061] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0062] As described in the background technology, the insulating plate in the power module in the related technology is inserted between the primary side unit and the secondary side unit of the transformer, which causes the width of the transformer's core air gap to be greater than the thickness of the insulating plate, resulting in a larger size of the core air gap and reducing the efficiency of the transformer.

[0063] In view of this, an embodiment of the present application aims to provide a power module, by providing a protrusion and a connecting bridge on the insulating plate, the protrusion and / or the connecting bridge form a protrusion to enclose one or more insulating cavities with the insulating plate, and at least part of the magnetic core of the transformer is arranged in the insulating cavity or the connecting bridge, so that the flat portion of the insulating plate does not pass through the air gap of the magnetic core, which is convenient for controlling the size of the air gap of the magnetic core, and is beneficial to improving the efficiency of the transformer in the power module.

[0064] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0065] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0066] Figure 1 This is an external schematic diagram of a power module provided in one embodiment of the present application; Figure 2 A simplified structural diagram of a power module provided in one embodiment of the present application; Figure 3 A simplified structural diagram of an insulating plate provided in one embodiment of the present application; Figure 4 A simplified structural diagram of an insulation board provided in another embodiment of the present application; Figure 5 A simplified structural diagram of a transformer provided in one embodiment of the present application; Figure 6 A simplified structural diagram of a transformer provided in another embodiment of the present application; Figure 7 A simplified diagram of the connection structure of a transformer and an insulating plate provided in one embodiment of the present application; Figure 8A schematic diagram of the connection structure of a transformer and an insulating plate provided in another embodiment of the present application; Fig. 9 A schematic diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application; Fig.10 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application; Fig.11 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application; Fig.12 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application; Fig.13 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application; Fig.14 A simplified diagram of the connection structure of a transformer and an insulating plate provided in yet another embodiment of the present application; Fig.15 A simplified structural diagram of a power module provided in another embodiment of the present application; Fig.16 A simplified structural diagram of a power module provided in yet another embodiment of the present application; Fig.17 A simplified structural diagram of a transformer provided in yet another embodiment of the present application; Fig.18 A schematic diagram of the connection structure of a transformer and an insulating plate provided in another embodiment of the present application; Fig.19 This is a simplified structural diagram of a magnetic core provided in yet another embodiment of the present application.

[0067] It should be noted that, in this embodiment, the first direction X, the second direction Y and the third direction Z are three different directions that are perpendicular to each other in a three-dimensional space.

[0068] Please refer to Figure 1 , Figure 2 , Fig.15 and Fig.16The present embodiment provides a power module, wherein a first side plate 101, a second side plate 102 and an insulating plate 100 are provided in the power module. In a third direction Z, the insulating plate 100, the first side plate 101 and the second side plate 102 are combined to form a first accommodating space 11 and a second accommodating space 12; a first power device 13 and at least a portion of a first winding 220 are provided in the first accommodating space 11, a second power device 14 is provided in the second accommodating space 12, an insulating cavity 140 is communicated with the second accommodating space 12, and the potentials are equal, and the second winding 230 is arranged in the insulating cavity, wherein the first power device 13, for example, may be a low-voltage power device, the second power device 14, for example, may be a high-voltage power device, the first winding 220 may be a low-voltage winding, and the second winding 230 may be a high-voltage winding. Among them, the first side plate 101 and the second side plate 102 can be a single-layer structure or a double-layer structure. For example, when the first power device 13 is a low-voltage power device and the second power device 14 is a high-voltage power device, the first side plate 101 and the second side plate 102 located on one side of the first accommodating space can be set as a single-layer structure, and the first side plate 101 and the second side plate 102 located on one side of the second accommodating space can be set as a double-layer structure. In terms of manufacturing method, the first side plate 101, the second side plate 102 and the insulating plate 100 can be integrally formed, or they can be separately manufactured and then assembled. When integrally formed, the volume is smaller, which can reduce the volume of the power module and increase the power density.

[0069] Alternatively, if Figure 2 and Fig.15 As shown, the power module further includes a cover plate 15, and in the third direction Z, the cover plate 15 covers the second accommodation space 12, so that the second accommodation space 12 forms a relatively sealed structure, so as to improve safety during use. Optionally, another cover plate may be included, covering the first accommodation space 11 in the third direction Z. In other possible implementations, the first power device 13 may be a high-voltage power device, the second power device 14 may be a low-voltage power device, the first winding 220 may be a high-voltage winding, and the second winding 230 may be a low-voltage winding. In the third direction Z, the cover plate covers the first accommodation space 11, so that the first accommodation space forms a relatively sealed structure, so as to improve safety during use.

[0070] Please refer to Figure 2 , Figure 3 and Figure 4In this embodiment, the insulating plate 100 includes a flat portion 110, a raised portion 120 and a connecting bridge 130. According to the needs of actual applications, the insulating plate 100 may include multiple raised portions 120 and multiple connecting bridges 130. The flat portion 110 is parallel to the plane formed by the first direction X and the second direction Y. The raised portion 120 and / or the connecting bridge 130 are raised along the third direction Z to jointly form an insulating cavity 140. The number of insulating cavities 140 may also be increased according to actual needs. At least one of the raised portion 120 and the connecting bridge 130 in this embodiment may be raised relative to the flat portion 110 in the positive or negative direction of the third direction Z (where the positive direction may be, for example, the direction indicated by the arrow in the figure, and the negative direction is opposite to the positive direction). That is, Figure 2 or Figure 3 As shown, only the protrusion 120 may be protruded while the connecting bridge 130 may not be protruded to form the insulating cavity 140; or Figure 4 As shown, only the connecting bridge 130 is raised while the raised portion 120 is not raised to form the insulating cavity 140; or both the raised portion 120 and the connecting bridge 130 are raised to form the insulating cavity 140; in actual application, the formation method of the insulating cavity 140 can be selected as needed. It should be noted that the raised portion 120 can also be integrated into the flat portion 110 to form a whole, and does not necessarily have to be raised.

[0071] In this embodiment, openings are provided at both ends of the insulating cavity 140 along the second direction Y to form a heat dissipation duct, which facilitates air to pass through to cool the transformer 200 .

[0072] For convenience of explanation, refer to Figure 2 , taking the direction from the second accommodating space 12 to the first accommodating space 11 as the positive direction of the third direction Z, along the positive direction of the third direction Z, the positional relationship between the protruding portion 120 and the connecting bridge 130 may include the following two types, one is that the protruding portion 120 is above the connecting bridge 130, and the other is that the connecting bridge 130 is above the protruding portion 120.

[0073] For example, in one possible implementation, Figure 3 As shown, along the third direction Z, the distance between the connecting bridge 130 and the flat plate portion 110 is zero, that is, the bottom surface of the connecting bridge is flush with the bottom surface of the flat plate portion, and the protrusion 120 is protruded toward one side of the first accommodating space 11. That is, in this embodiment, the protrusion 120 can be protruded toward the first accommodating space 11, while the connecting bridge 130 is not protruded, and is parallel to the plane formed by the first direction X and the second direction Y with the flat plate portion 110.

[0074] In other possible embodiments, along the third direction Z, the distance between the connecting bridge 130 and the flat plate portion 110 is zero, and the raised portion 120 may also be arranged to be raised toward one side of the second accommodating space 12, that is, in this embodiment, the raised portion 120 may be raised toward the second accommodating space 12, the connecting bridge 130 is not raised, and is parallel to the plane formed by the first direction X and the second direction Y with the flat plate portion 110.

[0075] For example, in another possible implementation, Figure 4 As shown, along the third direction Z, the distance between the protruding portion 120 and the flat portion 110 is zero, and the connecting bridge 130 is arranged to protrude toward one side of the second accommodating space 12. That is, in this embodiment, the connecting bridge 130 can protrude toward the second accommodating space 12, while the protruding portion 120 is not protruding, and the protruding portion 120 and the flat portion 110 are parallel to the plane formed by the first direction X and the second direction Y. At this time, the protruding portion 120 and the flat portion 110 can be integrally formed.

[0076] In other possible implementations, along the third direction Z, the distance between the protruding portion 120 and the flat portion 110 is zero, and the connecting bridge 130 may also be arranged to protrude toward one side of the first accommodating space 11. That is, in this implementation, the connecting bridge 130 may protrude toward the first accommodating space 11, while the protruding portion 120 is not protruding, and the protruding portion 120 and the flat portion 110 are parallel to the plane formed by the first direction X and the second direction Y. In this case, the protruding portion 120 and the flat portion 110 may be integrally formed.

[0077] Please refer to Figure 2 , Figure 5 and Figure 6 In this embodiment, the power module further includes a transformer 200, which includes a magnetic core 210 and a winding wound on the magnetic core 210. The winding may be directly wound on the magnetic core 210 or indirectly wound on the magnetic core 210. The winding includes a first winding 220 and a second winding 230. The first winding 220 is electrically connected to the first power device 13, and the second winding 230 is electrically connected to the second power device 14. The transformer 200 can realize voltage conversion between the first power device 13 and the second power device 14.

[0078] In the traditional power module structure, the size of the magnetic core air gap can generally only be adjusted in the thickness direction of the insulating plate, that is, in the third direction Z. However, due to the limitations of the insulating plate and the internal space, the magnetic core air gap cannot be flexibly adjusted, which limits the overall design. In the present embodiment, at least part of the magnetic core 210 is arranged in the insulating cavity 140 or the connecting bridge 130, so that the magnetic core air gap can be adjusted in the first direction X, the second direction Y and the third direction Z. The size of the magnetic core air gap can be freely adjusted according to the electrical parameter requirements of the transformer 200, which greatly increases the flexibility of the magnetic core design, and also makes it easy to control the size, tolerance and inductance value of the magnetic core air gap, which is conducive to improving the efficiency of the transformer 200 in the power module. In addition, the protruding portion 120 or the connecting bridge 130 protruding on the flat portion 110 makes the insulating plate 100 form a bending structure, which is conducive to improving the overall strength of the insulating plate 100, so that a thinner insulating plate 100 can meet the requirements, which is conducive to reducing the overall weight of the power module.

[0079] In a possible implementation, the magnetic core 210 of this embodiment may be inserted into the insulating cavity 140; that is, at least part of the magnetic core 210 is located in the insulating cavity 140. Part of the winding is disposed in the connecting bridge 130. The magnetic core 210 is provided with an opening along the first direction X, and the connecting bridge 130 is inserted into the opening of the magnetic core 210. Figure 5 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 The magnetic core 210 includes a first column 211 and a second column 212 extending along the third direction Z, and a first horizontal column 213 and a second horizontal column 214 extending along the second direction Y. The first column 211, the second column 212, the first horizontal column 213 and the second horizontal column 214 are combined to form an opening toward the first direction X. The connecting bridge 130 is located between the first horizontal column 213 and the second horizontal column 214. The first horizontal column 213 is located in the insulating cavity 140 formed by the connecting bridge 130 and the protrusion 120.

[0080] In this embodiment, one of the first winding 220 or the second winding 230 can be directly wound on the magnetic core 210, and the other winding includes a first part and a second part connected to each other, the first part is located on the side of the protrusion 120 away from the insulating cavity 140, and the second part is located in the connecting bridge 130. Optionally, the protrusion 120 can be a hollow structure, and the first part of the other winding passes through the hollow part of the protrusion 120; the protrusion 120 can also be a solid structure, and the first part of the other winding is arranged in the protrusion 120 and is integrally formed with the protrusion 120; or the surface of the protrusion 120 away from the insulating cavity 140 is provided with an open groove, and the first part of the other winding is arranged in the groove, and the first part of the other winding is integrally formed with the protrusion 120 or independently arranged; or the side of the protrusion 120 away from the insulating cavity 140 is smoothly arranged, that is, no groove is arranged, and the first part of the other winding is arranged on the surface of the protrusion 120 away from the insulating cavity 140.

[0081] like Figure 7 As shown, in one embodiment, the protrusion 120 protrudes toward one side of the first accommodating space 11, the connecting bridge 130 and the flat plate portion 110 are located in the same horizontal plane, the first cross column 213 of the magnetic core 210 is arranged in the insulating cavity 140 surrounded by the protrusion 120 and the connecting bridge 130, and the connecting bridge 130 is arranged between the first cross column 213 and the second cross column 214 of the magnetic core 210. The second winding 230 is directly wound on the first cross column 213; the first winding 220 includes two electrically connected parts, the first part 221 of the first winding 220 is arranged on the outside of the protrusion 120, and the second part 222 of the first winding 220 is arranged in the connecting bridge 130. In this embodiment, the winding method of the winding can refer to Figure 5 In the structure shown, the first winding 220 includes a first portion 221 and a second portion 222, wherein the first portion 221 is located on the side of the protrusion 120 away from the insulating cavity 140, and the second portion 222 is located in the connecting bridge 130. The second winding 230 is directly wound on the magnetic core 210, and the insulating cavity 140 is connected to the second accommodating space 12, and the potentials are equal.

[0082] Optionally, the first portion 221 and the second portion 222 of the first winding 220 may be integrally formed, in which case a through hole is provided in the connecting bridge 130 (ie, the through hole passes through the inside of the connecting bridge 130 ), and the second portion 222 is located in the through hole.

[0083] Alternatively, the second part 222 can be integrally formed with the connecting bridge 130. For example, the second part 222 is directly buried in the connecting bridge 130 during manufacturing, and the end of the second part 222 is located outside the connecting bridge 130. The end of the first part 221 is electrically connected to the end of the second part 222. Specifically, the end of the first part 221 can be electrically connected to the end of the second part 222 by welding or other methods.

[0084] like Figure 8 As shown, in one embodiment, the protruding portion 120 and the flat portion 110 are located in the same horizontal plane, the connecting bridge 130 protrudes toward one side of the second accommodation space 12, and the first horizontal column 213 of the magnetic core 210 is arranged in the insulating cavity 140 surrounded by the protruding portion 120 and the connecting bridge 130. In this embodiment, the connecting bridge 130 is U-shaped, and part of the connecting bridge 130 is arranged between the first horizontal column 213 and the second horizontal column 214 of the magnetic core 210. In this embodiment, the second winding 230 is directly wound on the magnetic core 210, preferably directly wound on the first horizontal column 213; the first winding 220 includes two electrically connected parts, the first part 221 of the first winding 220 is arranged on the outside of the protruding portion 120, and the second part 222 of the first winding 220 is arranged in the connecting bridge 130, and the insulating cavity 140 is connected to the second accommodation space 12.

[0085] like Fig. 9 As shown, in one embodiment, the protrusion 120 protrudes toward one side of the second accommodation space 12, the connecting bridge 130 and the flat plate portion 110 are located in the same horizontal plane, the first horizontal column 213 of the magnetic core 210 is inserted into the insulating cavity 140 surrounded by the protrusion 120 and the connecting bridge 130, and the connecting bridge 130 is inserted between the first horizontal column 213 and the second horizontal column 214 of the magnetic core 210. In this embodiment, the first winding 220 is directly wound on the magnetic core 210, preferably directly wound on the first horizontal column 213; the second winding 230 includes two electrically connected parts, the first part 221 of the second winding 230 is arranged on the outside of the protrusion 120, and the second part 222 of the second winding 230 is arranged in the connecting bridge 130, and the insulating cavity 140 is connected to the first accommodation space 11.

[0086] like Fig.10 As shown, in one embodiment, the protruding portion 120 and the flat portion 110 are located in the same horizontal plane, the connecting bridge 130 protrudes toward one side of the first accommodating space 11, and the first horizontal column 213 of the magnetic core 210 is disposed in the insulating cavity 140 surrounded by the protruding portion 120 and the connecting bridge 130. In this embodiment, the connecting bridge 130 is U-shaped, and part of the connecting bridge 130 is disposed between the first horizontal column 213 and the second horizontal column 214 of the magnetic core 210. In this embodiment, the first winding 220 is directly wound on the magnetic core 210, preferably directly wound on the first horizontal column 213; the second winding 230 includes two electrically connected parts, the first part 221 of the second winding 230 is disposed on the outside of the protruding portion 120, and the second part 222 of the second winding 230 is disposed in the connecting bridge 130, and the insulating cavity 140 is connected to the first accommodating space 11.

[0087] Figure 7 , Figure 8 , Fig. 9 and Fig.10In the embodiment shown, the insulating cavity 140 is provided with an opening in the second direction Y. Figure 1 and Figure 3 The airflow generated by the fan 16 can pass along the second direction Y, and the heat generated by the transformer arranged in the insulating cavity 140 can be directly taken away by the airflow, so the heat dissipation efficiency is greatly improved, which is conducive to reducing the volume of the power module and increasing the power density.

[0088] In another possible implementation, the connecting bridge 130 is provided with a through hole in the first direction X, and the magnetic core 210 can be inserted into the connecting bridge 130; that is, at least part of the magnetic core 210 is located in the connecting bridge 130. Figure 6 , Fig.11 , Fig.12 , Fig.13 and Fig.14 The magnetic core 210 includes a first unit 215 and a second unit 216. The first unit 215 is located on the side of the protrusion 120 away from the insulating cavity 140. The second unit 216 is fully or partially arranged in the connecting bridge 130. The second unit 216 can be formed integrally with the connecting bridge 130. Optionally, the protrusion 120 can be a hollow structure, and the second unit 216 passes through the hollow part of the protrusion 120; the protrusion 120 can also be a solid structure, and the second unit 216 is arranged in the protrusion 120 and is formed integrally with the protrusion 120; or the surface of the protrusion 120 away from the insulating cavity 140 is provided with an open groove, and the second unit 216 is arranged in the groove, and the second unit 216 is formed integrally with the protrusion 120 or is independently arranged; or the side of the protrusion 120 away from the insulating cavity 140 is smoothly arranged, that is, no groove is arranged, and the second unit 216 is arranged on the surface of the protrusion 120 away from the insulating cavity 140. Optionally, the magnetic core 210 may also only include the second unit 216 inserted into the connecting bridge, that is, an I-type magnetic core, and the magnetic core 210 is not disposed outside the protrusion 120. In this embodiment, based on the different structures of the protrusion 120 and the connecting bridge 130, the following embodiments may be included.

[0089] like Fig.11 As shown, in one embodiment, the protrusion 120 protrudes toward one side of the first accommodating space 11, the connecting bridge 130 and the flat plate portion 110 are located in the same horizontal plane, and the magnetic core 210 includes a first unit 215 and a second unit 216. The first unit 215 and the second unit 216 can be in direct contact or have a certain gap in the third direction Z. The first unit 215 is U-shaped and covers the outer side of the protrusion 120, while the second unit 216 is generally strip-shaped in the first direction X and is arranged in the connecting bridge 130. Another Fig.11A feasible way not shown in the figure is that the first unit 215 of the magnetic core 210 is located outside the protrusion 120, and the second unit 216 is U-shaped and partially penetrates the connecting bridge 130. The second unit 216 can be integrally formed with the connecting bridge 130. The first winding 220 is wound on the first unit 215 of the magnetic core 210. The first winding 220 can be wound on the horizontal column and / or the vertical column of the first unit 215, or can be wound on the second unit 216 of the magnetic core 210 arranged in the connecting bridge 130. The second winding 230 is wound on the connecting bridge 130, and the insulating cavity 140 is connected with the second accommodating space 12.

[0090] like Fig.12 As shown, in one embodiment, the protrusion 120 and the flat plate 110 are located in the same horizontal plane, the connecting bridge 130 is protruded toward one side of the second accommodating space 12, and the magnetic core 210 includes a first unit 215 and a second unit 216. The first unit 215 and the second unit 216 can be in direct contact with each other, or a certain gap can be provided in the third direction Z. The first unit 215 of the magnetic core 210 is located outside the protrusion 120, and the second unit 216 of the magnetic core 210 is U-shaped and penetrates the connecting bridge 130. Another Fig.12 A feasible way not shown in the figure is that the first unit 215 is also U-shaped, wherein a part of the first unit 215 is located outside the protrusion 120, and the other part is inserted into the connecting bridge 130 along the third direction Z. At this time, the second unit 216 can be U-shaped or strip-shaped in the first direction X. The second unit 216 can be integrally formed with the connecting bridge 130. The first winding 220 located in the first accommodating space 11 is wound on the first unit 215 of the outer magnetic core 210 of the protrusion 120, and the second winding 230 is wound on the connecting bridge 130, and the second winding 230 is partially located in the second accommodating space 12 and partially located in the insulating cavity 140. The insulating cavity 140 is connected to the second accommodating space 12. It can be understood that the second winding 230 is entirely located in the second accommodating space 12. Specifically, it can be wound on the horizontal part and / or the vertical part of the connecting bridge 130.

[0091] like Fig.13 As shown, in one embodiment, the protrusion 120 protrudes toward one side of the second accommodating space 12, the connecting bridge 130 and the flat plate portion 110 are located in the same horizontal plane, and the magnetic core 210 includes a first unit 215 and a second unit 216. The first unit 215 and the second unit 216 can be in direct contact or have a certain gap in the third direction Z. The first unit 215 is U-shaped and covers the outer side of the protrusion 120, while the second unit 216 is generally strip-shaped in the first direction X and is entirely arranged in the connecting bridge 130. Another Fig.13A feasible way not shown in the figure is that the first unit 215 of the magnetic core 210 is located outside the protrusion 120, and the second unit 216 is U-shaped and partially penetrates the connecting bridge 130. The second unit 216 can be integrally formed with the connecting bridge 130. The first winding 220 is wound on the connecting bridge 130, and the first winding 220 is partially located in the first accommodating space 11 and partially located in the insulating cavity 140. The insulating cavity 140 is connected to the first accommodating space 11. It can be understood that the first winding 220 is entirely located in the first accommodating space 11, and the second winding 230 located in the second accommodating space 12 is wound on the magnetic core 210 outside the protrusion 120.

[0092] like Fig.14 As shown, in one embodiment, the protrusion 120 and the flat plate 110 are located in the same horizontal plane, the connecting bridge 130 is protruding toward one side of the first accommodating space 11, and the magnetic core 210 includes a first unit 215 and a second unit 216. The first unit 215 and the second unit 216 can be in direct contact with each other, or a certain gap can be provided in the third direction Z. The first unit 215 of the magnetic core 210 is located outside the protrusion 120, and the second unit 216 of the magnetic core 210 is U-shaped and penetrates the connecting bridge 130. Another Fig.14 A feasible way not shown in the figure is that the first unit 215 is U-shaped, wherein a part of the first unit 215 is located outside the protrusion 120, and the other part is inserted into the connecting bridge 130 along the third direction Z. At this time, the second unit 216 can be U-shaped, or it can be strip-shaped in the first direction X. The second unit 216 can be integrally formed with the connecting bridge 130. The first winding 220 is wound on the connecting bridge 130, and the first winding 220 is partially located in the first accommodating space 11 and partially located in the insulating cavity 140. The insulating cavity 140 is connected to the first accommodating space 11. It can be understood that the first winding 220 is entirely located in the first accommodating space 11, and the second winding 230 located in the second accommodating space 12 is wound on the magnetic core 210 outside the protrusion 120.

[0093] exist Figure 11-Figure 14 In the illustrated embodiment, the winding is arranged outside the insulating cavity 140, so that the winding is not covered by insulation, which is more conducive to heat dissipation. Since the winding loss of the transformer is greater than the core loss, arranging the winding outside the insulating cavity 140 can further improve the efficiency of the transformer 200. In addition, in this embodiment, the winding does not need to pass through the inside of the connecting bridge 130, and the connection of the inlet and outlet lines is simple; and at this time, a smooth air duct can be formed inside the insulating cavity 140 in the second direction Y, which is more conducive to heat dissipation.

[0094] The surface of the insulating plate 100 disclosed in this embodiment may be provided with a semiconductive layer, and the semiconductive layer material includes graphene or carbon black, which plays a shielding role. Commonly used semiconductive coating parameters: thickness: 10um to 200um, conductivity range: 10^(-11)s / m to 10^(3)s / m, but not limited thereto.

[0095] The insulating cavity 140 disclosed in this embodiment is provided with openings at both ends along the second direction Y, that is, the inside of the insulating cavity 140 is conductive in the second direction Y, so that the airflow generated by the fan 16 can directly act on the transformer 200 and directly take away the heat generated by the transformer 200, which greatly improves the heat dissipation efficiency and is conducive to reducing the volume of the power module and increasing the power density.

[0096] In another embodiment, the power module may also be Fig.15 In the structure shown, ie, along the first direction X, the insulating cavity 140 is located in the middle of the insulating plate 100 , and the corresponding transformer 200 is also located in the middle of the insulating plate 100 .

[0097] The above structure allows the first accommodation space 11 to be distributed on both sides of the insulation cavity 140. Figure 2 The structure shown in FIG. 1 is that the insulating cavity 140 is arranged near the edge of the insulating plate 100. Fig.15 The structure shown is more conducive to the arrangement of the first power device 13 in a limited space, thereby greatly improving the space utilization, and is conducive to reducing the volume of the power module and increasing the power density.

[0098] In yet another embodiment, the power module may also be Fig.16 In the structure shown, the insulating plate 100 may be provided with a plurality of insulating cavities 140. In this case, the power module includes a plurality of transformers 200. The plurality of transformers 200 correspond to the plurality of insulating cavities 140. According to different circuit structures, one or more transformers 200 may be placed in one insulating cavity. In this embodiment, the plurality of transformers 200 may be connected in series or in parallel. Fig.17 As shown, in this embodiment, two transformers 200 connected in series are provided in one insulating cavity 140 , and the transformers 200 in a plurality of insulating cavities 140 may be connected in parallel to each other.

[0099] The above structure can reduce the size of a single transformer 200 and the height of the insulating cavity 140, so that the first power device 13 and the second power device 14 can be closer to the transformer 200, which is beneficial to saving space, reducing the volume of the power module, and increasing power density.

[0100] In another embodiment, the magnetic core 210 is provided with a through hole along the third direction Z. In this case, the insulating plate 100 includes a plurality of protrusions 120 and a plurality of connecting bridges 130. The plurality of protrusions 120 and the plurality of connecting bridges 130 are combined to form a plurality of insulating cavities 140. Fig.18 As shown, the insulating plate 100 includes at least two insulating cavities 140, taking two insulating cavities 140 as an example, they are a first insulating cavity 141 and a second insulating cavity 142, and the first insulating cavity 141 and the second insulating cavity 142 are both penetrated by a magnetic core 210. Fig.19 The magnetic core 210 includes a first longitudinal column 217 and a second longitudinal column 218 extending along the first direction X, and a first transverse column 213 and a second transverse column 214 extending along the second direction Y. The first longitudinal column 217, the second longitudinal column 218, the first transverse column 213 and the second transverse column 214 form an opening toward the third direction Z. The first winding 220 is disposed in the insulating cavity 140, and the second winding 230 is partially disposed in the connecting bridge 130 and partially disposed in the second accommodating space 12.

[0101] The protrusion 120 protrudes toward one side of the second accommodation space 12, and the connecting bridge 130 and the flat plate portion 110 are located in the same horizontal plane. The first cross column 213 and the second cross column 214 of the magnetic core 210 are respectively disposed in the first insulating cavity 141 and the second insulating cavity 142. In this embodiment, the number of windings is not limited, and exemplarily includes two first windings 220 and two second windings 230, the two first windings 220 are directly wound on the first horizontal column 213 and the second horizontal column 214 respectively; the two second windings 230 each include two electrically connected parts, the first parts 221 of the two second windings 230 are respectively arranged on the outside of the protrusion 120 forming the first insulating cavity 141 and the second insulating cavity 142, and the second parts 222 of the two second windings 230 are respectively arranged in the connecting bridge 130 forming the first insulating cavity 141 and the second insulating cavity 142, that is, the first winding 220 and the second winding 230 are wound outside the first horizontal column 213, and the first winding 220 and the second winding 230 are also wound outside the second horizontal column 214. The first windings 220 wound on different horizontal columns can be electrically connected in series or in parallel, and the second windings 230 wound on different horizontal columns can be electrically connected in series or in parallel. With this structure, module output configuration is flexible.

[0102] Several other Fig.18 Possible methods not shown in the figure include: the raised portion 120 and the flat portion 110 are located in the same horizontal plane, and the connecting bridge 130 protrudes toward the first accommodating space 11; or the connecting bridge 130 protrudes toward the second accommodating space 12, and the raised portion 120 and the flat portion 110 are located in the same horizontal plane; or the connecting bridge 130 and the flat portion 110 are located in the same horizontal plane, and the raised portion 120 protrudes toward the first accommodating space 11.

[0103] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0104] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0105] It should be noted that in the description of this application, the terms "first" and "second" are only used to facilitate the description of different components, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0106] The various embodiments or implementation methods in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0107] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A power module, characterized in that: include: A first side plate, a second side plate and an insulating plate, wherein the insulating plate comprises a flat plate portion, one or more protruding portions and one or more connecting bridges, wherein the flat plate portion is parallel to a plane formed by the first direction and the second direction; the protruding portions and / or the connecting bridges protrude along a third direction to form an insulating cavity; The insulating plate, the first side plate and the second side plate are combined to form a first accommodating space and a second accommodating space along a third direction, a first power device is arranged in the first accommodating space, and a second power device is arranged in the second accommodating space; and A transformer, comprising a magnetic core and a winding wound on the magnetic core, the winding comprising a first winding and a second winding, at least a portion of the magnetic core is disposed in the insulating cavity or the connecting bridge; the first winding is electrically connected to the first power device, and the second winding is electrically connected to the second power device; The first direction, the second direction and the third direction are perpendicular to each other.

2. The power module according to claim 1, characterized in that: At least part of the magnetic core is arranged in the insulating cavity, and part of the winding is arranged in the connecting bridge.

3. The power module according to claim 2, characterized in that: The magnetic core is provided with an opening along the first direction, and part of the connecting bridge is passed through the opening of the magnetic core.

4. The power module according to claim 2, characterized in that: One of the first winding and the second winding is directly wound on the magnetic core, and the other of the first winding and the second winding includes a first part and a second part that are electrically connected, the first part is located on a side of the protrusion away from the insulating cavity, and the second part is located in the connecting bridge.

5. The power module according to claim 4, characterized in that: The first part and the second part are integrally formed, a through hole is provided in the connecting bridge, and the second part is located in the through hole.

6. The power module according to claim 4, characterized in that: The second part is formed integrally with the connecting bridge, an end of the second part is located outside the connecting bridge, and an end of the first part is electrically connected to an end of the second part.

7. The power module according to claim 3, characterized in that: The magnetic core includes a first column and a second column extending along the third direction and a first column and a second column extending along the second direction. The first column, the first column, the second column and the second column are connected end to end in sequence, and the first column is located in the insulating cavity.

8. The power module according to claim 1, characterized in that: At least a portion of the magnetic core is disposed in the connecting bridge.

9. The power module according to claim 8, characterized in that: The magnetic core includes a first unit and a second unit, the first unit is located at a side of the protruding portion away from the insulating cavity, and the second unit is penetrated in the connecting bridge.

10. The power module according to claim 9, characterized in that: The first winding is wound on the first unit, the second winding is wound on the connecting bridge, the first winding is arranged in the first accommodating space, and the second winding is arranged in the second accommodating space.

11. The power module according to claim 9, characterized in that: The second winding is wound on the first unit, the first winding is wound on the connecting bridge, the first winding is arranged in the first accommodating space, and the second winding is arranged in the second accommodating space.

12. The power module according to claim 8, characterized in that: The connecting bridge is provided with a through hole along the first direction, and at least a part of the magnetic core is passed through the through hole.

13. The power module according to claim 8, characterized in that: At least a portion of the magnetic core is integrally formed with the connecting bridge.

14. The power module according to claim 8, characterized in that: One of the first winding and the second winding is directly wound on the magnetic core located in the connecting bridge, and the other of the first winding and the second winding is wound on the connecting bridge.

15. The power module according to claim 1, characterized in that: The insulating plate includes a plurality of the protrusions and a plurality of the connecting bridges, and along the first direction, the plurality of the protrusions and the plurality of the connecting bridges form a plurality of the insulating cavities; the power module includes a plurality of the transformers, and the plurality of the transformers correspond to the plurality of the insulating cavities, and the plurality of the transformers are connected in series or in parallel.

16. The power module according to any one of claims 1 to 15, characterized in that: Along the third direction, the distance between the connecting bridge and the flat plate portion is zero, and the protruding portion is arranged to protrude toward one side of the first accommodating space or the second accommodating space.

17. The power module according to any one of claims 1 to 15, characterized in that: Along the third direction, the distance between the protruding portion and the flat plate portion is zero, and the connecting bridge is protruded toward one side of the first accommodating space or the second accommodating space.

18. The power module according to any one of claims 1 to 15, characterized in that: A semiconductive layer is provided on the surface of the insulating plate.

19. The power module according to claim 18, characterized in that: The material of the semiconductive layer includes graphene or carbon black.

20. The power module according to claim 1, characterized in that: Along the second direction, two ends of the insulating cavity are provided with openings.

21. The power module according to claim 1, characterized in that: It also includes a cover plate, and in the third direction, the cover plate covers the second accommodating space, and the second power device includes a high-voltage power device.

22. The power module according to claim 21, characterized in that: Parts of the first side plate and the second side plate located in the second accommodating space are double-layer structures.

23. The power module according to claim 2, characterized in that: The magnetic core is provided with an opening along the third direction, and part of the connecting bridge or the protrusion is passed through the opening of the magnetic core.

24. The power module according to claim 23, characterized in that: The insulating plate comprises a plurality of the protrusions and a plurality of the connecting bridges, and the plurality of the protrusions and the plurality of the connecting bridges form at least two insulating cavities; The magnetic core includes a first longitudinal column and a second longitudinal column extending along the first direction and a first transverse column and a second transverse column extending along the second direction. The first longitudinal column, the first transverse column, the second longitudinal column and the second transverse column are connected end to end in sequence, and the first transverse column and the second transverse column are respectively arranged in different insulating cavities.

25. The power module according to claim 24, characterized in that: The winding includes two first windings and two second windings, the two first windings are respectively wound around the first horizontal column and the second horizontal column, the two second windings each include a first part and a second part that are electrically connected, the first parts of the two second windings are respectively arranged on the side of the protrusion that forms the insulating cavity through which the first horizontal column and the second horizontal column are penetrated, away from the insulating cavity, and the second parts of the two second windings are respectively arranged in the connecting bridge that forms the insulating cavity through which the first horizontal column and the second horizontal column are penetrated; the two first windings are both arranged in the first accommodating space.

26. The power module according to claim 24, characterized in that: The winding includes two first windings and two second windings, the two second windings are respectively wound around the first horizontal column and the second horizontal column, the two first windings each include a first part and a second part that are electrically connected, the first parts of the two first windings are respectively arranged on the side of the protrusion that forms the insulating cavity through which the first horizontal column and the second horizontal column are penetrated, away from the insulating cavity, and the second parts of the two first windings are respectively arranged in the connecting bridge that forms the insulating cavity through which the first horizontal column and the second horizontal column are penetrated; the two second windings are both arranged in the first accommodating space.

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