A power component and a liquid-cooled converter

Abstract

The present invention discloses a power assembly and liquid-cooled converter. The power assembly includes a capacitor module comprising interconnected DC capacitor pools and capacitor busbars; an input busbar, an output busbar, and three single-phase switch tube groups, each of which includes a plurality of switch modules connected to the input busbar and the output busbar; the input busbar is connected to the connecting portion; the output busbar is used to output electrical energy; and at least one heat sink. In the power module, each single-phase switch tube group is arranged in parallel on the heat sink, and the arrangement direction of each single-phase switch tube group is parallel to the connection portion of the capacitor busbar; and in each single-phase switch tube group, the arrangement direction of each switch module is consistent with the arrangement direction of each single-phase switch tube group. This power assembly can improve the problems of poor current loop balance and high stray inductance in existing power assemblies.

Description

Technical Field

[0001] The present invention relates to the field of electric power equipment, and in particular to a power component and a liquid-cooled converter. Background Art

[0002] Converters are widely used in power systems, rail transit, military industry, petroleum machinery, new energy vehicles, wind power generation, solar photovoltaics, and other fields. They connect between battery systems and the power grid to achieve bidirectional conversion of electrical energy, controlling the charging and discharging processes of batteries and performing AC-DC conversion. They can directly power AC loads in the absence of a power grid. Furthermore, NPC (Neutral Point Clamp) or ANPC (Active Neutral Point Clamp) three-level topologies utilize low-blocking-voltage IGBTs to increase the DC bus voltage, thereby boosting the AC output voltage and increasing the system power level. Consequently, they are widely used in converters.

[0003] like Figure 1 As shown, it shows the structure of a three-level topology power component in a conventional converter, which mainly includes a capacitor busbar 01, a DC capacitor pool 02, an input bar 03, a switch tube 04, an output bar 05, a heat sink 06 and a connecting bar 07.

[0004] Among them, the capacitor busbar 01 and the DC capacitor pool 02 cooperate to form a capacitor module. The capacitor busbar 01 includes a positive plate, a neutral plate and a negative plate. According to the circuit structure of the three-level topology, the capacitor components in the DC capacitor pool 02 are connected to the plates of different polarities on the capacitor busbar 01.

[0005] Because the power module outputs three-phase AC power, it includes three groups of single-phase switching transistors. Each group includes multiple switch modules, a heat sink 06, a group of input bars 03, a group of connecting bars 07, and an output bar 05. Heat sink 06 is an air-cooled heat sink, with one side forming the mounting surface for the switching transistors 04 and the other side, facing away from the mounting surface, equipped with cooling fins.

[0006] Continue to refer to Figure 2Each switch module includes three switch tubes 04. The upper two switch tubes 04a are located above, and the lower one is an output tube 04b. The two input tubes 04a and the input tubes 04a and output tubes 04b are connected via a connecting bar 07, and the switch modules are connected in parallel. Parallel connection can increase the output current capacity of the bridge arm of a single three-level topology. This power component uses a structure with four switch modules connected in parallel. A set of input bars 03, corresponding to the capacitor busbar 01, is provided with a positive plate, a neutral plate, and a negative plate, each of which is connected to the corresponding plates on the capacitor busbar 01. The output bar 05 is connected to the output ends of the four switch modules to provide single-phase AC output. The output bars 05 of the three sets of switch modules collectively provide a three-phase AC output.

[0007] Continue to refer to Figure 3a and Figure 3b , take a set of switch modules as an example to illustrate, Figure 3a is the circuit diagram of the three-level topology. Figure 3b This is a schematic diagram of the actual connection of the switch tube 04. In one switch module, there are two input tubes 04a and one output tube 04b. The terminals connecting the two input tubes 04a to the input row 03 include a positive terminal 041, a first neutral terminal 042, a second neutral terminal 043, and a negative terminal 044. The positive terminal 041 is connected to the positive plate of the input row 03, the first neutral terminal 042 and the second neutral terminal 043 are connected to the neutral plate of the input row 03, and the negative terminal 044 is connected to the negative plate of the input row 03. After the lower terminals of the two input tubes 04a are connected, they are respectively connected to the output tube 04b below through the connecting row 07. The lower end of the output tube 04b has a first output terminal 045 and a second output terminal 046, both of which are connected to the output row 05. The input tube 04a may include Figure 3a T1, D1, T2, D2; input pipe 04b may include Figure 3a T3, D3, T4, D4 in the output tube; the output tube may include Figure 3a T5, D5, T6, D6.

[0008] In a switch module, the corresponding terminal of the input tube 04a forms the input end of the switch module, and the corresponding terminal of the output tube 04b forms the output end of the switch module. In a single-phase switch module, the input end of each switch module forms the input end of the single-phase switch module, and the output end of each switch module forms the output end of the single-phase switch module.

[0009] Obviously, the power components of this structure have the following problems: the power components are large in size, making the corresponding converter unsuitable for small electrical cabinets or electrical cabinets with special requirements; and the power components use a large number of copper busbar stacking methods to reduce the stray inductance generated during commutation, resulting in excessively high manufacturing costs of the power components. Summary of the Invention

[0010] The object of the present invention is to overcome at least one defect or problem in the background art and to provide a power component and a converter.

[0011] The present invention and its related embodiments adopt the following technical solutions but are not limited to the following solutions:

[0012] The first technical solution and its related embodiments relate to a power component, which includes: a capacitor module, which includes a DC capacitor pool and a capacitor busbar connected to each other; the capacitor busbar has a connecting portion; a power module, which includes an input busbar, an output busbar and three switch tube groups; each of the switch tube groups includes a number of switch modules and is connected to the input busbar and the output busbar; the input busbar is connected to the connecting portion; the output busbar is used to output electrical energy; the switch tubes included in each of the switch modules are divided into input tubes and output tubes according to their types; it also includes: at least one heat sink, whose surface forms two mounting surfaces that are mutually deviated and used to mount each switch tube group; each of the switch modules is divided into a part including only the input tube and a part including only the output tube according to the type of the switch tube, and any of the mounting surfaces of the same heat sink only includes a part thereof.

[0013] The second technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein both mounting surfaces are parallel to the connecting portion, and one mounting surface faces the connecting portion, while the other mounting surface faces away from the connecting portion.

[0014] The third technical solution is based on the second technical solution and is a preferred embodiment of the second technical solution, wherein, in each switch tube group, the input tube and the output tube of each switch module in each part are arranged in parallel along the left and right directions respectively, and the input tube and the output tube in each switch module are connected by a connecting row.

[0015] The fourth technical solution is based on the third technical solution and is a preferred embodiment of the third technical solution, wherein, in each switch module, the part of the switch tube type that is an input tube is installed on the mounting surface facing the capacitor busbar, and the part of the switch tube type that is an output tube is installed on the mounting surface facing away from the capacitor busbar.

[0016] The fifth technical solution is based on the fourth technical solution and is a preferred embodiment of the fourth technical solution, wherein the number of the radiator is one, and the three switch tube groups are arranged in the upper, middle and lower parts of the radiator in sequence along the up and down directions; in the switch tube group located at the upper and / or lower part of the radiator, the connecting row bypasses the upper edge and / or lower edge of the radiator; in the switch tube group located in the middle part of the radiator, the connecting row passes through the radiator along the front-to-back direction.

[0017] The sixth technical solution is based on the fourth technical solution and is a preferred embodiment of the fourth technical solution, wherein the number of the radiator is one, and the three switch tube groups are arranged in the upper, middle and lower parts of the radiator in sequence along the up and down directions; in the switch tube groups located in the upper, middle and / or lower parts of the radiator, the connecting row passes through the radiator along the front-to-back direction.

[0018] The seventh technical solution is based on the fourth technical solution and is a preferred embodiment of the fourth technical solution, wherein the switch tube groups are arranged in parallel on the radiator in the up-down direction; the number of the radiators is three, and the three radiators are arranged in the up-down direction, and each radiator has a corresponding switch tube group installed on it; in each switch tube group, the connecting row bypasses the upper edge or lower edge of the radiator on which it is located.

[0019] The eighth technical solution is based on the fourth technical solution and is a preferred embodiment of the fourth technical solution, wherein the number of the radiator is one, and the three switch tube groups are arranged in parallel on the radiator along the left and right directions, and the input ends of the three switch tube groups are all connected to the same input row; in each of the switch tube groups, the connecting row bypasses the upper edge or lower edge of the radiator where it is located.

[0020] The ninth technical solution is based on the fourth technical solution and is a preferred embodiment of the fourth technical solution, wherein each switch tube group is arranged in parallel on the radiator along the left-right direction; the number of the radiators is three, and the three radiators are arranged along the left-right direction. Each radiator is correspondingly equipped with a switch tube group, and the input ends of the three switch tube groups are all connected to the same input row; in each switch tube group, the connecting row bypasses the upper edge or lower edge of the radiator where it is located.

[0021] The tenth technical solution and its related embodiments relate to a liquid-cooled converter, which includes a power component as described in any one of the first to ninth technical solutions, and the radiator used is a liquid-cooled radiator.

[0022] From the above description of the present invention and its specific embodiments, it can be seen that compared with the prior art, the technical solution of the present invention and its related embodiments have the following beneficial effects due to the adoption of the following technical means:

[0023] After continuous observation, experimentation and research, the inventors found that the reason for the technical problem of "large power component size" in the existing technical solution is that due to the use of an air-cooled radiator, only one side of the radiator surface can be used to install the switching tube, resulting in low surface utilization of the radiator and a large layout area of the switching tube.

[0024] In this regard, in the first technical solution and related embodiments, the heat sink used has two mounting surfaces, both of which can be used to install the switching tube and dissipate heat and cool the switching tube, thereby improving the surface utilization of the radiator and reducing the layout area of the switching tube; at the same time, each switching tube group is divided into two parts according to the type of switching tube included in the switch module, that is, one part includes the input tube and the other part includes the output tube. The switching tubes of these two parts are respectively installed on the two mounting surfaces of the radiator, so that when each switch tube group is wired, the input row and the output row will not be staggered, which is convenient for the wiring of the switch module and the installation of the input row and output row. At the same time, the consistent maintenance points can also facilitate later maintenance.

[0025] In the second technical solution and related embodiments, both mounting surfaces are parallel to the connection portion, so that the heat sink can be arranged in a stacked manner with the capacitor busbar, reducing the size of the power component in the thickness direction, making the power component occupy less space and more conducive to practical use.

[0026] In the third technical solution and related embodiments, in each switch tube group, the switch tubes in the two parts are arranged in parallel along the left-right direction corresponding to each other. That is, in one switch tube group, the input tubes are arranged in parallel along the left-right direction, and the output tubes are also arranged in parallel along the left-right direction. In this way, the input tubes can share the same input row extending along the left-right direction, and the output tubes can also share the same output row extending along the left-right direction. This facilitates the wiring of the switch modules and the installation of the input and output rows. At the same time, it can ensure that in each switch tube group, the distance from the input end of each switch module to the connection part of the capacitor busbar is consistent, the current loop is better balanced, and the stray inductance can be reduced.

[0027] In the fourth technical solution and related embodiments, the input tubes in all switch modules are installed toward the capacitor busbar, and the output tubes are installed away from the capacitor busbar, which can reduce the distance between the input tubes in the switch module and the connection part of the capacitor busbar, and the input busbar and the output busbar will not be staggered or cover each other after installation, and the overall wiring is simpler and safer.

[0028] In the fifth and sixth technical solutions and related embodiments, the three switch tube groups are arranged in sequence along the up-down direction, the required heat sink is shortened in the left-right direction, and the shape of the heat sink is more square, which can facilitate the installation of the heat sink and the power module in the converter; in addition, three switch tube groups are installed on a heat sink, among which the connecting row of the switch tube group located in the middle can pass through the heat sink to connect the input tube and the output tube on the two mounting surfaces, and the switch tube group located at the edge of the heat sink can choose to make the connecting row bypass the edge of the heat sink, or choose to make the connecting row pass through the heat sink, both of which can facilitate the connection of the input tube and the output tube in each switch module; and, since the connecting row of the switch module in the middle switch tube group does not need to bypass the edge of the heat sink from one mounting surface to reach another mounting surface, the commutation loop of the switch tube group can be shortened, the overall stray inductance of the power component can be reduced, and the wiring of the switch tube group is also facilitated.

[0029] In the seventh technical solution and related embodiments, three radiators are provided, and a switch tube group is installed on each radiator, which can reduce the heat dissipation pressure of the radiator, reduce the requirements for the radiator, reduce the preparation cost of the radiator, and there is no need to drill holes in the radiator. The connecting row can directly bypass the edge of the radiator, further reducing the preparation cost of the radiator.

[0030] In the eighth technical solution and related embodiments, the three switch tube groups are arranged in parallel along the left-right direction, and the required radiator is shortened in the up-down direction, which can improve the utilization rate of the radiator surface area and make the overall volume of the radiator smaller. In addition, three switch tube groups are installed on one radiator. Since these switch tube groups are arranged in parallel along the left-right direction, each switch tube group can be connected to the same input bus, which can reduce the preparation and installation cost of the input bus. At the same time, the distance between each switch tube group and the connection part of the capacitor bus is consistent, which can improve the balance of the current loop.

[0031] In the ninth technical solution and related embodiments, three radiators are provided, and a switch tube group is installed on each radiator, which can reduce the heat dissipation pressure of the radiator, reduce the requirements for the radiator, and reduce the preparation cost of the radiator.

[0032] In the tenth technical solution and related embodiments, a liquid-cooled converter is provided, which uses a liquid-cooled radiator. Based on the power components used, it has the above-mentioned technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 The structure of the existing converter power component mentioned in the background technology is shown in FIG. Figure 1 ;

[0035] Figure 2 The structure of the existing converter power component mentioned in the background technology is shown in FIG. Figure 2 ;

[0036] Figure 3a A schematic diagram of the circuit topology of the conventional converter power component mentioned in the background art;

[0037] Figure 3b 3 is a structural diagram of the existing converter power component mentioned in the background technology;

[0038] Figure 4a This is a schematic diagram of the structure of embodiment 1 of the present invention Figure 1 ;

[0039] Figure 4b This is a schematic diagram of the structure of embodiment 1 of the present invention Figure 2 ;

[0040] Figure 5a This is a schematic diagram of the structure of embodiment 2 of the present invention Figure 1 ;

[0041] Figure 5b This is a schematic diagram of the structure of embodiment 2 of the present invention Figure 2 ;

[0042] Figure 6a This is a schematic diagram of the structure of embodiment 3 of the present invention Figure 1 ;

[0043] Figure 6b This is a schematic diagram of the structure of embodiment 3 of the present invention Figure 2 ;

[0044] Figure 7a This is a schematic diagram of the structure of embodiment 4 of the present invention Figure 1 ;

[0045] Figure 7b This is a schematic diagram of the structure of embodiment 4 of the present invention Figure 2 ;

[0046] Figure 8a This is a schematic diagram of the structure of Example 5 of the present invention Figure 1 ;

[0047] Figure 8b This is a schematic diagram of the structure of Example 5 of the present invention Figure 2 ;

[0048] Figure 9a This is a schematic diagram of the structure of Example 6 of the present invention Figure 1 ;

[0049] Figure 9b This is a schematic diagram of the structure of Example 6 of the present invention Figure 2 ;

[0050] Figure 10a This is a schematic diagram of the structure of Example 7 of the present invention Figure 1 ;

[0051] Figure 10b This is a schematic diagram of the structure of Example 7 of the present invention Figure 2 ;

[0052] Figure 11a This is a schematic diagram of the structure of Example 8 of the present invention Figure 1 ;

[0053] Figure 11b This is a schematic diagram of the structure of Example 8 of the present invention Figure 2 ;

[0054] Figure 12a This is a schematic diagram of the structure of Example 9 of the present invention Figure 1 ;

[0055] Figure 12b This is a schematic diagram of the structure of Example 9 of the present invention Figure 2 ;

[0056] Figure 13a This is a schematic diagram of the structure of embodiment 10 of the present invention. Figure 1 ;

[0057] Figure 13b This is a schematic diagram of the structure of embodiment 10 of the present invention. Figure 2 ;

[0058] Figure 14 This is a schematic diagram of the structure of embodiment 11 of the present invention Figure 1 ;

[0059] Figure 15 This is a schematic diagram of the structure of embodiment 11 of the present invention Figure 2 ;

[0060] Figure 16 This is a structural diagram 3 of embodiment 11 of the present invention;

[0061] Figure 17 for Figure 15 Schematic diagram of the middle AA section;

[0062] Figure 18a This is a schematic diagram of the structure of embodiment 12 of the present invention. Figure 1 ;

[0063] Figure 18b This is a schematic diagram of the structure of embodiment 12 of the present invention. Figure 2 ;

[0064] Figure 19 This is a structural diagram of Example 13 of the present invention.

[0065] Description of main reference numerals:

[0066] In the instruction manual Figure 1 To 3:

[0067] Capacitor busbar 01; DC capacitor pool 02; input busbar 03; switch tube 04; output busbar 05; heat sink 06; connection busbar 07;

[0068] Input pipe 04a; Output pipe 04b;

[0069] Positive terminal 041; first neutral terminal 042; second neutral terminal 043; negative terminal 044; first output terminal 045; second output terminal 046.

[0070] In Figures 4 to 19 of the specification:

[0071] Radiator 10; switch tube 20; input tube 21; output tube 22; input bus 31; output bus 32; connection bus 33; single-phase switch tube group 40; first phase 41; second phase 42; third phase 43; capacitor busbar 50;

[0072] A first sub-radiator 10a; a second sub-radiator 10b; and a third sub-radiator 10c.

[0073] Input row first part 31a; input row second part 31b; input row third part 31c;

[0074] Output row first portion 32a; output row second portion 32b; output row third portion 32c;

[0075] First phase first portion 41a; first phase second portion 41b;

[0076] The second phase first portion 42a; the second phase second portion 42b;

[0077] The third phase first portion 43a; the third phase second portion 43b;

[0078] Input row positive plate 311; input row neutral plate 312; input row terminal 313;

[0079] Connecting row first portion 331; connecting row second portion 332;

[0080] Capacitor busbar positive plate 51; capacitor busbar center line plate 52; capacitor busbar negative plate 53. DETAILED DESCRIPTION

[0081] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0082] In the claims, description and drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is for the purpose of distinguishing different objects rather than for describing a specific order.

[0083] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise expressly defined, directional words such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present invention.

[0084] In the claims, description and above-mentioned drawings of the present invention, unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0085] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0086] Regarding the structure of the power component in the prior art described in the background technology section, the inventors have studied it and found that the reason why the power component of this structure is too large is that the three groups of single-phase switch tube groups are respectively arranged on three heat sinks 10, and the volume of the power component is increased due to the influence of the heat sink 10.

[0087] In addition, the inventors also found that the power components of this structure also have the problem of excessively high stray inductance. The reason is that the input bus 03 is arranged vertically relative to the capacitor bus 01, resulting in the switch module located on the outside relative to the capacitor bus 01 being too far away from the capacitor bus 01, which in turn causes the commutation circuit to be too long and the stray inductance to increase.

[0088] To this end, the present invention provides the following embodiments to solve the above technical problems.

[0089] Example 1

[0090] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0091] The capacitor module includes a capacitor busbar 50 and a DC capacitor pool that are connected to each other. The capacitor busbar 50 has a connecting portion, and the connecting portion is used to connect the power module. With reference to background technology, the capacitor busbar 50 has a positive plate, a center plate and a negative plate. The three plates are stacked and respectively have three input terminals. The power module can draw electricity from the capacitor busbar 50 by connecting to the capacitor busbar 50. The part where the two are connected becomes the above-mentioned connecting portion. Therefore, the position of the connecting portion on the capacitor busbar 50 is determined based on the position to which the power module is connected. It can be considered that the part on the capacitor busbar 50 that is connected to the power module and the nearby part are all the above-mentioned connecting portions. It should be noted that the connecting portion should be flat so that the power module can be connected. At the same time, under normal circumstances, the capacitor busbar 50 is also flat, and the connecting portion is formed on the capacitor busbar 50.

[0092] The power module includes an input bus 31, an output bus 32, and three single-phase switch tube groups 40. The input bus 31 is connected to the connection portion of the capacitor bus 50 and to each single-phase switch tube group 40. Each single-phase switch tube group 40 is connected to an output bus 32 to output single-phase AC power. Each single-phase switch tube group 40 includes a plurality of switch modules composed of switch tubes 20. The switch tubes 20 are IGBT devices. Three switch tubes 20 cooperate to form a switch module, and multiple switch modules are connected in parallel to form a single-phase switch tube group 40. Each single-phase switch tube group 40 is used to output single-phase AC power. The power module has a total of three single-phase switch tube groups 40, which cooperate to output three-phase AC power. In this embodiment, each single-phase switch tube group 40 includes four switch modules, for a total of twelve switch tubes 20.

[0093] The switch tubes 20 in each switch module include an input tube 21 and an output tube 22. There are two input tubes 21 and one output tube 22. The input end of the input tube 21 forms the input end of its corresponding switch module, and the output end of the output tube 22 forms the output end of its corresponding switch module.

[0094] Referring to the background art, the input tubes 21 and output tubes 22 are connected by a connecting bar 33, which can be a copper bar. The input ends of the two input tubes 21 are connected to the connection portion of the capacitor busbar 50 via the input bar 31. The output ends of the two input tubes 21 are connected to the input ends of the output tubes 22 via the connecting bar 33. The output ends of the output tubes 22 are connected to the output bar 32. Each output tube 22 in each single-phase switching tube group 40 is connected to the same output bar 32.

[0095] Input and output busbars 31 and 32 are used to transmit current in a hard-wired manner and can be copper busbars or terminal blocks. For example, if the connection between some input tubes 21 and capacitor busbars 50 in a single-phase switch group is close, a direct connection using terminal blocks can be used instead of copper busbars.

[0096] The heat sink 10 is used to mount the switching tube 20. Once mounted on the switching tube 20, excess heat is removed through the heat sink 10, preventing the switching tube 20 from overheating during operation. Conventionally, the heat sink 10 can be an air-cooled heat sink, as described in the background art. In this embodiment, an air-cooled heat sink can also be used. In this case, the side of the air-cooled heat sink 10 facing away from the cooling fins forms the mounting surface for the switching tube 20.

[0097] However, as a preferred embodiment, a liquid-cooled radiator is used in this embodiment. A liquid-cooled radiator can provide higher heat dissipation efficiency, and more switching tubes 20 can be stacked in one liquid-cooled radiator. A liquid-cooled radiator is generally a plate-shaped component, with both sides forming mounting surfaces.

[0098] The following describes the layout of the switch tubes 20 in the power assembly.

[0099] As an optional embodiment, all three single-phase switching transistor groups 40 are mounted on a single heat sink 10. This eliminates the need for multiple heat sinks 10 as described in the background section, effectively reducing the overall size of the power module. As will be appreciated, mounting all three single-phase switching transistor groups 40 on a single heat sink 10 requires good heat dissipation performance. In this case, the liquid-cooled heat sink employed in this embodiment may be a preferred option.

[0100] Furthermore, in each single-phase switch group 40, the layout direction of each switch module is parallel to the connection portion of the capacitor busbar 50. This ensures that the distance between each switch module and the capacitor busbar 50 in each single-phase switch group 40 is equal, avoiding the problem of inconsistent commutation loop lengths of switch modules at different locations in each single-phase switch group 40.

[0101] Furthermore, the three single-phase switch tube groups 40 are all installed on a mounting surface of the radiator 10, and the mounting surface is parallel to the connecting portion. The mounting surface and the connecting portion referred to here are parallel, which can be regarded as the flat radiator 10 and the flat capacitor busbar 50 being arranged in a stacked manner. When the mounting surface is located on the front side of the radiator 10, it is convenient to maintain the three unidirectional switch modules, and when another mounting surface is formed on the other side of the radiator 10, the other mounting surface of the radiator 10 can be used to quickly dissipate heat and improve the heat dissipation efficiency. In this embodiment, the three single-phase switch tube groups 40 are installed on the front mounting surface of the radiator 10, but in other embodiments, the three single-phase switch tube groups 40 can also be installed on the rear mounting surface of the radiator 10. When installed on the rear mounting surface, the various switch tubes 20 and the input row 31 and the output row 32 can be arranged with reference to the layout described in this embodiment.

[0102] Furthermore, each switch module in all single-phase switch tube groups 40 is divided into two parts arranged at the upper and lower parts of the mounting surface, and each switch module in each part is arranged in parallel along the left and right directions, and the input ends of the switch modules in the two parts are away from each other.

[0103] Furthermore, the three single-phase switch tube groups 40 are respectively a first phase 41, a second phase 42, and a third phase 43; the first phase 41 and the second phase 42 are arranged at the upper and lower portions of the mounting surface, respectively, with their output ends facing each other and located in the middle portion of the mounting surface, and each of their output ends is connected to an output bar 32; the third phase 43 is divided into a third-phase first portion 43a and a third-phase second portion 43b according to the number of switch modules included, both of which are arranged at the upper and lower portions of the mounting surface, with their output ends both located in the middle portion of the mounting surface and connected to the same output bar 32. It should be noted that the term "parallel arrangement" as used in this specification means that the positions of the input tubes 21 of each switch module correspond to each other in the left-right direction, and the positions of the output tubes 22 also correspond to each other in the left-right direction.

[0104] The above content is further explained below.

[0105] In this embodiment, of the two side surfaces of the liquid-cooled radiator, the side surface facing away from the capacitor busbar 50 forms a mounting surface, and the power module is mounted on the mounting surface, so the power module is also arranged away from the connection portion of the capacitor busbar 50.

[0106] Reference Figure 4a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 and shows the corresponding directions. Figure 4b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 4aThe direction shown is the direction from the front of the radiator 10 , when viewed toward the front mounting surface of the radiator 10 .

[0107] In this embodiment, four switch modules form a single-phase switch tube group 40, and the three single-phase switch tube groups 40 are respectively the first phase 41, the second phase 42 and the third phase 43, wherein the first phase 41 and the second phase 42 include four switch modules arranged in parallel, and the third phase 43 is divided into a third-phase first part 43a and a third-phase second part 43b, each part including two switch modules arranged in parallel.

[0108] In the first phase 41 and the second phase 42, the four switch modules are arranged in parallel in the left-right direction, so the output end and the input end of each switch module are also arranged in parallel. At this time, the input ends of the four switch modules jointly form the input end of the single-phase switch tube group 40, and the output ends of the four switch modules jointly form the output end of the single-phase switch tube group 40.

[0109] In the third phase 43, the four switch modules are divided into two parts, and the two switch modules in each part are arranged in parallel along the left-right direction. Therefore, the output end and the input end of each switch module in each part are also arranged in parallel. At this time, the input ends of the two switch modules in each part jointly form the input end of the part, and the output ends of the two switch modules in each part jointly form the output end of the part.

[0110] Furthermore, the switch modules in the first phase 41 and the third phase first portion 43 a are arranged in parallel; and the switch modules in the second phase 42 and the third phase second portion 43 b are also arranged in parallel.

[0111] Reference Figure 4a The single-phase switching tube groups 40 of the first phase 41 and second phase 42 are arranged symmetrically in vertical direction. That is, the input and output of the first phase 41 are located at the top and bottom, respectively, while the input and output of the second phase 42 are located at the bottom and top, respectively. The output ends of the two phases are opposite each other, while the input ends are spaced apart. When installed on the heat sink 10, the input end of the first phase 41 corresponds to the top edge of the heat sink 10, and the output end corresponds to the middle of the heat sink 10. The input end of the second phase 42 corresponds to the bottom edge of the heat sink 10, and the output end corresponds to the middle of the heat sink 10. The third phase first portion 43a and the third phase second portion 43b of the third phase 43 are also arranged symmetrically in vertical direction. That is, the input and output ends of the third phase first portion 43a are located at the top and bottom, respectively, while the input and output ends of the third phase second portion 43b are located at the bottom and top, respectively. The output ends of the two phases are opposite each other, while the input ends are spaced apart. When installed on the radiator 10, the input end of the first part 43a of the third phase corresponds to the upper edge of the radiator 10, and the output end corresponds to the middle of the radiator 10; the input end of the second part 43b of the third phase corresponds to the lower edge of the radiator 10, and the output end corresponds to the middle of the radiator 10.

[0112] Reference Figure 4a Each single-phase switching transistor group 40 is connected to the capacitor busbar 50 via an input busbar 31 and is also connected to an output busbar 32. The input ends of the single-phase switching transistor groups 40 for the first phase 41 and the third phase first portion 43a are both located at the upper edge of the heat sink 10, so an input busbar first portion 31a can be disposed along the upper edge of the heat sink 10. The input ends of the single-phase switching transistor groups 40 for the second phase 42 and the third phase second portion 43b are both located at the lower edge of the heat sink 10, so an input busbar second portion 31b can be disposed along the lower edge of the heat sink 10. The output end of the first phase 41 is correspondingly provided with an output busbar first portion 32a, and the output end of the second phase 42 is correspondingly provided with an output busbar second portion 32b. The output ends of the third phase first portion 43a and the third phase second portion 43b are located opposite each other, so a shared output busbar third portion 32c can be disposed accordingly.

[0113] Reference Figure 4b The capacitor busbar 50 is located on the rear side of the radiator 10, and the three single-phase switch tube groups 40 are installed on the front mounting surface of the radiator 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, so the commutation loop length of each switch module is equal, and compared with the background technology solution, the distance is also shorter, the stray inductance is reduced, and the switching loss is reduced accordingly.

[0114] Specifically, the first input busbar portion 31a includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. The second input busbar portion 31b also includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. Because the input ends of the three single-phase switching tube groups 40 are located at the upper and lower edges of the heat sink 10, respectively, the first and second input busbar portions 31a, 31b do not need to pass through the front mounting surface of the heat sink 10 to reach the capacitor busbar 50. Moreover, the first and second input busbar portions 31a, 31b are equidistant from the capacitor busbar 50, resulting in a more balanced DC current loop.

[0115] The first output row portion 32a, the second output row portion 32b, and the third output row portion 32c are all located in the middle of the front mounting surface of the radiator 10, and are concentrated in position to facilitate external output wiring.

[0116] The power component provided in this embodiment reduces the volume of the heat sink 10 , thereby reducing the overall volume of the power component, while also reducing the generation of stray inductance.

[0117] Example 2

[0118] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0119] For an introduction to the heat sink 10 , the capacitor module and the power module, please refer to Example 1.

[0120] The following describes the layout of the switch tubes 20 in the power assembly.

[0121] As an optional embodiment, the three single-phase switch tube groups 40 are divided into two parts to be respectively installed on the two mounting surfaces of the radiator 10. In this embodiment, both side surfaces of the liquid-cooled radiator are formed into mounting surfaces, and the power module is installed on these two mounting surfaces. In this way, the volume of the radiator 10 can be reduced, the space utilization of the radiator 10 can be further improved, and the overall volume of the power component can be reduced. Moreover, the two mounting surfaces are parallel to the connecting portion. The mounting surface referred to here as being parallel to the connecting portion can be regarded as the flat plate-shaped radiator 10 and the flat plate-shaped capacitor busbar 50 being arranged in a stacked manner.

[0122] Furthermore, in each single-phase switch tube group 40, the switch modules are arranged side by side in the left-right direction. One complete single-phase switch tube group 40 is located on the front mounting surface of the radiator 10, and another complete single-phase switch tube group 40 is located on the rear mounting surface of the radiator 10. In the last single-phase switch tube group 40, the output tubes 22 of the switch modules are located on the front mounting surface of the radiator 10, and the input tubes 21 of the switch modules are located on the rear mounting surface of the radiator 10. It should be noted that in the last single-phase switch tube group 40, the output tubes 22 are arranged side by side in the left-right direction, and the input tubes 21 are also arranged side by side in the left-right direction.

[0123] The above content is further explained below.

[0124] Reference Figure 5a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 in this embodiment, and shows the corresponding directions. Figure 5b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 5a The direction shown is the direction when looking at the front mounting surface of the radiator 10 from the front side of the radiator 10, that is, Figure 5a Directions shown are for guidance only Figure 5a Orientation of the front-side view in .

[0125] Reference Figure 5aIn this embodiment, four switch modules form a single-phase switch tube group 40, with the three single-phase switch tube groups 40 being a first phase 41, a second phase 42, and a third phase 43. The first phase 41 and the second phase 42 each include four switch modules arranged in parallel, while the third phase 43 is divided into a third-phase first portion 43a and a third-phase second portion 43b. The third-phase first portion 43a includes all output tubes 22 of each switch module in the single-phase switch tube group 40, while the third-phase second portion 43b includes all input tubes 21 of each switch module in the single-phase switch tube group 40.

[0126] Reference Figure 5a The single-phase switch tube group 40 of the first phase 41 is located on the front mounting surface of the radiator 10, the single-phase switch tube group 40 of the second phase 42 is located on the rear mounting surface of the radiator 10, the first part 43a of the third phase is located on the front mounting surface of the radiator 10, and the second part 43b of the third phase is located on the rear mounting surface of the radiator 10.

[0127] In the first phase 41 and the second phase 42, the four switch modules are arranged side by side in the left-right direction. Therefore, the output and input ends of each switch module are also arranged side by side. In this case, the input ends of the four switch modules collectively form the input end of the single-phase switch tube group 40, and the output ends of the four switch modules collectively form the output end of the single-phase switch tube group 40. Furthermore, the input and output ends of the single-phase switch tube groups 40 of the first phase 41 and the second phase 42 are located at the top and bottom, respectively. When installed on the heat sink 10, the input ends of the first phase 41 and the second phase 42 correspond to the upper edge of the heat sink 10, with the only difference being that one is located at the front and the other at the back of the heat sink 10. Simultaneously, the output ends of the first phase 41 and the second phase 42 correspond to the middle of the heat sink 10.

[0128] The first part 43a of the third phase corresponds to the output tubes 22 of each switch module in the single-phase switch tube group 40 of the third phase 43. These four output tubes 22 are arranged in parallel in the left-right direction, and the output ends of these four output tubes 22 are also arranged in parallel. At this time, the output ends of these four output tubes 22 jointly form the output end of the single-phase switch tube group 40; the second part 43b of the third phase corresponds to the input tubes 21 of each switch module in the single-phase switch tube group 40 of the third phase 43. These eight input tubes 21 are arranged in parallel in the left-right direction. The two input tubes 21 in the same switch module are set close to each other, and the input ends of these eight input tubes 21 are also arranged in parallel. At this time, the input ends of these eight input tubes 21 jointly form the input end of the single-phase switch tube group 40. In the third phase 43, the output end and input end of the single-phase switch tube group 40 are both located at the bottom. When installed on the radiator 10, even if the output end and input end of the single-phase switch tube group 40 correspond to the upper edge of the radiator 10, the difference is that its output end is located on the front side of the radiator 10 and the input end is located on the rear side of the radiator 10.

[0129] Reference Figure 5a Each single-phase switching transistor group 40 is connected to the capacitor busbar 50 via an input busbar 31 and is also connected to an output busbar 32. The input ends of the single-phase switching transistor groups 40 for the first phase 41 and the second phase 42 are both located at the upper edge of the heat sink 10. Therefore, the first input busbar portion 31a and the second input busbar portion 31b can be disposed at the upper edge of the heat sink 10. The first input busbar portion 31a and the second input busbar portion 31b can be connected in parallel before being connected to the capacitor busbar 50. The input end of the second input busbar portion 43b of the third phase is located at the lower edge of the heat sink 10. Therefore, the third input busbar portion 31c can be disposed at the lower edge of the heat sink 10.

[0130] Reference Figure 5b The output ends of the single-phase switch tube group 40 of the first phase 41 and the second phase 42 are both located in the middle of the radiator 10. Therefore, the first part 32a and the second part of the output row can be set in the middle position of the radiator 10. It should be noted that the first part 32a of the output row is located on the front side of the radiator 10 and can be directly connected to the external output wiring. However, the second part 32b of the output row is located on the rear side of the radiator 10. If it is to be connected to the external output wiring, it requires sufficient space between the mounting surface on the rear side of the radiator 10 and the capacitor busbar 50, which is not conducive to the length of the overall commutation circuit of the power module. Therefore, an opening can be set in the middle position of the radiator 10 to lead the second part 32b of the output row from the rear side of the radiator 10 to the front side of the radiator 10, thereby facilitating the external output wiring of the second part 32b of the output row.

[0131] The output end of the first portion 43a of the third phase is located at the lower edge of the heat sink 10, where the third portion 32c of the output row can be located. In the third phase 43, the two input tubes 21 and output tubes 22 of each switch module are located on either side of the heat sink 10. Therefore, openings can be provided at corresponding locations on the heat sink 10 to connect the input tubes 21 and output tubes 22 of each switch module via the connecting row 33. For ease of manufacturing, since the location of the connecting row 33 in the third phase 43 also corresponds to the center of the heat sink 10, only one opening can be provided in the center of the heat sink 10. This opening can be used to pass both the connecting row 33 and the second portion 32b of the output row.

[0132] Reference Figure 5b The capacitor busbar 50 is located on the rear side of the heat sink 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, and the commutation loop length of each switch module is also equal, the stray inductance is reduced, and the switching loss is reduced accordingly.

[0133] Specifically, the first part 31a of the input row includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50; the input row 31 also includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. Since the input ends of the three single-phase switch tube groups 40 are respectively located at the upper edge and the lower edge of the radiator 10, the first part 31a, the second part, and the third part of the input row do not need to pass through the front mounting surface of the radiator 10 to reach the capacitor busbar 50. Among them, the distances from the second part 31b of the input row and the third part 31c of the input row to the capacitor busbar 50 are equal, and the DC side current loop is better balanced. At the same time, although the current loop distance between the single-phase switch tube group 40 corresponding to the first phase 41 and the capacitor busbar 50 is slightly longer, the stray inductance is reduced by stacking the input row 31, which can meet the use requirements.

[0134] Compared with Example 1, the power component provided in this embodiment further reduces the volume of the heat sink 10 by arranging the switching tube 20 on the front and rear sides of the heat sink 10, improves the surface space utilization of the heat sink 10, reduces the overall volume of the power component, and reduces the generation of stray inductance.

[0135] Example 3

[0136] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0137] For an introduction to the heat sink 10 , the capacitor module and the power module, please refer to Example 1.

[0138] The following describes the layout of the switch tubes 20 in the power assembly.

[0139] In this embodiment, a liquid cooling radiator is used. The liquid cooling radiator can provide higher heat dissipation efficiency, and more switching tubes 20 can be stacked in one liquid cooling radiator. The liquid cooling radiator is generally a plate-shaped component, and both sides of the liquid cooling radiator can form a mounting surface.

[0140] As an optional implementation, three single-phase switch tube groups 40 are arranged in parallel along the vertical direction.

[0141] In each single-phase switch tube group 40, the output tube 22 of the switch module is located on the front mounting surface of the heat sink 10, and the input tube 21 of the switch module is located on the rear mounting surface of the heat sink 10. In this embodiment, both mounting surfaces are parallel to the connection portion. The parallelism between the mounting surface and the connection portion here refers to the arrangement of the flat heat sink 10 and the flat capacitor busbar 50 in a stacked manner.

[0142] Corresponding to this layout, the term "parallel arrangement" within a single-phase switching tube group 40 means that within each single-phase switching tube group 40, the output tubes 22 are arranged side by side in the left-right direction, and the input tubes 21 are also arranged side by side in the left-right direction. This "parallel arrangement" refers to treating each single-phase switching tube group 40 as a whole, with the arrangement direction of the switch modules within each single-phase switching tube group 40 as the overall extension direction of the single-phase switching tube group 40. In other words, each single-phase switching tube group 40 extends in the left-right direction. Under this premise, the three single-phase switching tube groups 40 are arranged in parallel from top to bottom on the heat sink 10.

[0143] Furthermore, in each single-phase switch tube group 40 , the output end and the input end are both located below the single-phase switch tube group 40 .

[0144] The above content is further explained below.

[0145] Reference Figure 6a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 in this embodiment, and shows the corresponding directions. Figure 6b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 6a The direction shown is the direction when looking at the front mounting surface of the radiator 10 from the front side of the radiator 10, that is, Figure 6a Directions shown are for guidance only Figure 6a Orientation of the front-side view in .

[0146] Reference Figure 6a In this embodiment, four switch modules form a single-phase switch tube group 40, with the three single-phase switch tube groups 40 being a first phase 41, a second phase 42, and a third phase 43. The first phase 41, the second phase 42, and the third phase 43 are each divided into two parts: a first-phase first part 41a and a first-phase second part 41b, a second-phase first part 42a and a second-phase second part 42b, and a third-phase first part 43a and a third-phase second part 43b. The first part of each phase corresponds to each input tube 21 in the single-phase switch tube group 40, and the second part of each phase corresponds to each output tube 22 in the single-phase switch tube group 40.

[0147] Reference Figure 6a In each single-phase switch tube group 40 , the input ends of the four switch modules together form the input end of the single-phase switch tube group 40 , and the output ends of the four switch modules together form the output end of the single-phase switch tube group 40 .

[0148] The first phase 41 is located at the top of the heat sink 10, the second phase 42 is located at the middle of the heat sink 10, and the second phase 42 is located at the bottom of the heat sink 10. Correspondingly, the first portion 41a of the first phase is located on the rear mounting surface at the top of the heat sink 10, and the second portion 41b of the first phase is located on the front mounting surface at the top of the heat sink 10. The first portion 41a of the first phase is connected to the second portion 41b of the first phase via a connecting bar 33, which bypasses the top edge of the heat sink 10. The first portion 42a of the second phase is located on the rear mounting surface at the middle of the heat sink 10, and the second portion 42b of the second phase is located on the front mounting surface at the middle of the heat sink 10. The first portion 42a of the second phase is connected to the second portion 42b of the second phase via a connecting bar 33. Reference can be made to Example 2 for providing openings at corresponding locations on the heat sink 10, through which the connecting bar 33 can connect the first portion 42a of the second phase to the second portion 42b of the second phase. The third-phase first portion 43a is located on the rear mounting surface of the lower position of the radiator 10, and the third-phase second portion 43b is located on the front mounting surface of the lower position of the radiator 10. The third-phase first portion 43a and the third-phase second portion 43b are connected by a connecting row 33. Similarly, an opening can be set at the corresponding position of the radiator 10, and the connecting row 33 can pass through the opening to connect the third-phase first portion 43a and the third-phase second portion 43b.

[0149] Reference Figure 6a Each single-phase switching transistor group 40 is connected to the capacitor busbar 50 via an input busbar 31 and is also connected to an output busbar 32. The input of the first phase 41 is connected to the first portion 31a of the input busbar, which is located below the first portion 41a of the first phase. The output of the first phase 41 is connected to the first portion 32a of the output busbar, which is located below the second portion 41b of the first phase. The input of the second phase 42 is connected to the second portion 31b of the input busbar, which is located below the first portion 42a of the second phase. The output of the second phase 42 is connected to the second portion 32b of the output busbar, which is located below the second portion 42b of the second phase. The input of the third phase 43 is connected to the third portion 31c of the input busbar, which is located below the first portion 43a of the third phase. The output of the third phase 43 is connected to the third portion 32c of the output busbar, which is located below the second portion 43b of the third phase.

[0150] refer to Figure 6bThe capacitor busbar 50 is located on the rear side of the heat sink 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, and the commutation loop length of each switch module is also equal, the stray inductance is reduced, and the switching loss is reduced accordingly.

[0151] Specifically, the first input row portion 31a, the second input row portion 31b, and the third input row portion 31c each include a positive plate, a neutral plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. Since the input ends of the three single-phase switch tube groups 40 are all located on the rear side of the heat sink 10, the first input row portion 31a, the second input row portion, and the third input row portion can all be directly connected to the capacitor busbar 50. In addition, the input end of each single-phase switch tube group 40 is equidistant from the capacitor busbar 50, which can improve the balance of the DC side current loop. At the same time, the output end of each single-phase switch tube group 40 is located on the front side of the heat sink 10, making it easy to connect the first output row portion 32a, the second output row portion, and the third output row portion to the external output wiring.

[0152] Compared with Example 1, the power component provided in this embodiment further reduces the volume of the heat sink 10 by arranging the switching tube 20 on the front and rear sides of the heat sink 10, improves the surface space utilization of the heat sink 10, reduces the overall volume of the power component, and reduces the generation of stray inductance.

[0153] Furthermore, while the number of heat sinks 10 in this embodiment is one, in other embodiments, the number of heat sinks 10 can be set to three, with the three heat sinks 10 arranged in the vertical direction. A complete single-phase switch tube group 40 is correspondingly installed on each heat sink 10. The wiring method of the single-phase switch tube group 40 can refer to the wiring method of each single-phase switch tube group 40 in this embodiment. However, when three heat sinks 10 are used, the connecting bars 33 in each single-phase switch tube group 40 can directly bypass the upper or lower edge of the heat sink 10 on which it is located. Using three heat sinks 10 reduces the heat dissipation capacity requirements of a single heat sink 10, which can reduce the cost of the heat sink 10. It also facilitates the wiring and maintenance of the single-phase switch tube group on each heat sink 10.

[0154] Example 4

[0155] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0156] For an introduction to the heat sink 10 , the capacitor module and the power module, please refer to Example 1.

[0157] The following describes the layout of the switch tubes 20 in the power assembly.

[0158] In this embodiment, a liquid cooling radiator is used. The liquid cooling radiator can provide higher heat dissipation efficiency, and more switching tubes 20 can be stacked in one liquid cooling radiator. The liquid cooling radiator is generally a plate-shaped component, and both sides of the liquid cooling radiator can form a mounting surface.

[0159] In this embodiment, in each single-phase switching tube group 40, the output tube 22 of the switching module is located on the front mounting surface of the heat sink 10, and the input tube 21 of the switching module is located on the rear mounting surface of the heat sink 10. In this embodiment, both mounting surfaces are parallel to the connection portion. The parallelism between the mounting surface and the connection portion here refers to the arrangement of the flat heat sink 10 and the flat capacitor busbar 50 in a stacked manner.

[0160] In this layout, the term "parallel arrangement" refers to the arrangement of the output tubes 22 and input tubes 21 in each single-phase switching tube group 40 in parallel along the left-right direction. This "parallel arrangement" means that each single-phase switching tube group 40 is considered a whole, with the arrangement direction of the switch modules in each single-phase switching tube group 40 as the overall extension direction of the single-phase switching tube group 40. In other words, each single-phase switching tube group 40 extends in the left-right direction. Under this premise, the three single-phase switching tube groups 40 are arranged in parallel from top to bottom on the heat sink 10.

[0161] Furthermore, in the two single-phase switch tube groups 40 located above, the output end and the input end are both located below their respective single-phase switch tube groups 40; in the two single-phase switch tube groups 40 located below, the output end and the input end are both located above the single-phase switch tube group 40.

[0162] Reference Figure 7a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 in this embodiment, and shows the corresponding directions. Figure 7b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 7a The direction shown is the direction when looking at the front mounting surface of the radiator 10 from the front side of the radiator 10, that is, Figure 7a Directions shown are for guidance only Figure 7a Orientation of the front-side view in .

[0163] Reference Figure 7aIn this embodiment, four switch modules form a single-phase switch tube group 40, with the three single-phase switch tube groups 40 being a first phase 41, a second phase 42, and a third phase 43. The first phase 41, the second phase 42, and the third phase 43 are each divided into two parts: a first-phase first part 41a and a first-phase second part 41b, a second-phase first part 42a and a second-phase second part 42b, and a third-phase first part 43a and a third-phase second part 43b. The first part of each phase corresponds to each input tube 21 in the single-phase switch tube group 40, and the second part of each phase corresponds to each output tube 22 in the single-phase switch tube group 40.

[0164] Reference Figure 7a In each single-phase switch tube group 40 , the input ends of the four switch modules together form the input end of the single-phase switch tube group 40 , and the output ends of the four switch modules together form the output end of the single-phase switch tube group 40 .

[0165] The first phase 41 is located at the top of the heat sink 10, the second phase 42 is located at the middle of the heat sink 10, and the second phase 42 is located at the bottom of the heat sink 10. Correspondingly, the first portion 41a of the first phase is located on the rear mounting surface at the top of the heat sink 10, and the second portion 41b of the first phase is located on the front mounting surface at the top of the heat sink 10. The first portion 41a of the first phase is connected to the second portion 41b of the first phase via a connecting bar 33, which bypasses the top edge of the heat sink 10. The first portion 42a of the second phase is located on the rear mounting surface at the middle of the heat sink 10, and the second portion 42b of the second phase is located on the front mounting surface at the middle of the heat sink 10. The first portion 42a of the second phase is connected to the second portion 42b of the second phase via a connecting bar 33. Reference can be made to Example 2 for providing openings at corresponding locations on the heat sink 10, through which the connecting bar 33 can connect the first portion 42a of the second phase to the second portion 42b of the second phase. The third-phase first portion 43a is located on the rear mounting surface of the lower position of the radiator 10, and the third-phase second portion 43b is located on the front mounting surface of the lower position of the radiator 10. The third-phase first portion 43a and the third-phase second portion 43b are connected by a connecting row 33. Similarly, the third-phase first portion 43a and the third-phase second portion 43b are connected by a connecting row 33, and the connecting row 33 bypasses the lower edge of the radiator 10.

[0166] Reference Figure 7aEach single-phase switching transistor group 40 is connected to the capacitor busbar 50 via an input busbar 31 and is also connected to an output busbar 32. The input of the first phase 41 is connected to the first portion 31a of the input busbar, which is located below the first portion 41a of the first phase. The output of the first phase 41 is connected to the first portion 32a of the output busbar, which is located below the second portion 41b of the first phase. The input of the second phase 42 is connected to the second portion 31b of the input busbar, which is located below the first portion 42a of the second phase. The output of the second phase 42 is connected to the second portion 32b of the output busbar, which is located below the second portion 42b of the second phase. The input of the third phase 43 is connected to the third portion 31c of the input busbar, which is located above the first portion 43a of the third phase. The output of the third phase 43 is connected to the third portion 32c of the output busbar, which is located above the second portion 43b of the third phase.

[0167] refer to Figure 7b The capacitor busbar 50 is located on the rear side of the heat sink 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, and the commutation loop length of each switch module is also equal, the stray inductance is reduced, and the switching loss is reduced accordingly.

[0168] Specifically, the first part 31a of the input row includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50; the input row 31 also includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. Since the input ends of the three single-phase switch tube groups 40 are all located on the rear side of the radiator 10, the first part 31a, the second part, and the third part of the input row can all be directly connected to the capacitor busbar 50, and the input end of each single-phase switch tube group 40 is at an equal distance from the capacitor busbar 50, which can improve the balance of the DC side current loop. At the same time, the output end of each single-phase switch tube group 40 is located on the front side of the radiator 10, so the first part 32a, the second part, and the third part of the output row are all easy to connect to the external output wiring.

[0169] Moreover, compared with Example 3, the input ends of the second-phase first portion 42a and the third-phase first portion 43a can be connected in parallel and then connected to the capacitor busbar 50, thereby reducing the total length of the input busbar second portion 31b and the input busbar third portion 31c, which is beneficial to reducing stray inductance and reducing costs.

[0170] Compared with Example 1, the power component provided in this embodiment further reduces the volume of the heat sink 10 by arranging the switching tube 20 on the front and rear sides of the heat sink 10, improves the surface space utilization of the heat sink 10, reduces the overall volume of the power component, and reduces the generation of stray inductance.

[0171] Example 5

[0172] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0173] For an introduction to the heat sink 10 , the capacitor module and the power module, please refer to Example 1.

[0174] The following describes the layout of the switch tubes 20 in the power assembly.

[0175] Conventionally, the radiator 10 can be an air-cooled radiator as described in the background. In this embodiment, an air-cooled radiator can also be used. In this case, the side of the air-cooled radiator 10 facing away from the cooling fins forms a mounting surface for the switching tube 20. However, as a preferred embodiment, a liquid-cooled radiator is used in this embodiment. Liquid-cooled radiators offer higher heat dissipation efficiency, allowing for the stacking of more switching tubes 20. Liquid-cooled radiators are generally plate-shaped components, with both sides forming mounting surfaces.

[0176] As an optional embodiment, in the power module, each single-phase switch tube group is arranged in parallel on the heat sink 10, and the arrangement direction of each single-phase switch tube group is parallel to the connection portion; in each single-phase switch tube group, the arrangement direction of each switch module is consistent with the arrangement direction of each single-phase switch tube group. In each single-phase switch tube group 40, the arrangement direction of each switch module is parallel to the connection portion of the capacitor busbar 50. In this way, it can be ensured that the distance from each switch module to the capacitor busbar 50 in each single-phase switch tube group 40 is equal, avoiding the problem of inconsistent commutation circuit lengths of switch modules in different positions in each single-phase switch tube group 40.

[0177] Furthermore, the three single-phase switch tube groups 40 are all installed on a mounting surface of the radiator 10. In the present embodiment, the mounting surface is parallel to the connecting portion. The mounting surface and the connecting portion referred to here are parallel to each other and can be regarded as being arranged in a stacked manner between the flat plate-shaped radiator 10 and the flat plate-shaped capacitor busbar 50. When the mounting surface is located on the front side of the radiator 10, it is convenient to maintain the three unidirectional switch modules, and when another mounting surface is formed on the other side of the radiator 10, the other mounting surface of the radiator 10 can be used to quickly dissipate heat and improve the heat dissipation efficiency. In the present embodiment, the three single-phase switch tube groups 40 are installed on the front mounting surface of the radiator 10, but in other embodiments, the three single-phase switch tube groups 40 can also be installed on the rear mounting surface of the radiator 10. When installed on the rear mounting surface, the various switch tubes 20 and the input row 31 and the output row 32 can be arranged with reference to the layout described in the present embodiment.

[0178] The above content is further explained below.

[0179] Specifically, refer to Figure 8a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 and shows the corresponding directions. Figure 8b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 8a The direction shown is the direction from the front of the radiator 10 when viewed toward the front surface of the radiator 10 .

[0180] In this embodiment, four switch modules form a single-phase switch group 40. The three single-phase switch groups 40 are respectively for the first phase 41, the second phase 42, and the third phase 43. The first phase 41, the second phase 42, and the third phase 43 each include four switch modules arranged in parallel along the left-right direction. Within each switch module, the output and input ends of each switch module are also arranged in parallel. In this case, the input ends of the four switch modules collectively form the input end of the single-phase switch group 40, and the output ends of the four switch modules collectively form the output end of the single-phase switch group 40.

[0181] Reference Figure 8a Each single-phase switching transistor group 40 is connected to the capacitor busbar 50 via an input busbar 31 and is also connected to an output busbar 32. The input and output terminals of each phase of the three single-phase switching transistor groups 40 are located above and below, respectively. Therefore, an input busbar 31 can be provided along the upper edge of the heat sink 10 to connect all three single-phase switching transistor groups 40. Three output busbars 32 can be provided along the lower edge of the heat sink 10, corresponding to the first phase 41, the second phase 42, and the third phase 43, respectively, as the first output busbar portion 32a, the second output busbar portion 32b, and the third output busbar portion 32c.

[0182] Reference Figure 8b The capacitor busbar 50 is located on the rear side of the radiator 10, and the three single-phase switch tube groups 40 are installed on the front mounting surface of the radiator 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, and the commutation loop length of each switch module is also equal, the stray inductance is reduced, and the switching loss is reduced accordingly.

[0183] Specifically, the first portion 31a of the input busbar includes a positive plate, a neutral plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. The input busbar 31 also includes a positive plate, a neutral plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. Since the input ends of the three single-phase switch tube groups 40 are all located at the upper edge of the heat sink 10, only one input busbar 31 is required to connect to the capacitor busbar 50. Therefore, the distance between each single-phase switch tube group 40 and the capacitor busbar 50 is equal, and the current loop distances between the three single-phase switch tube groups 40 and the capacitor busbar 50 are consistent. Regardless of the direction of the current from the capacitor busbar 50, the time when the current reaches each single-phase switch tube group 40 is also equal, thus achieving optimal current loop balance.

[0184] The first output row portion 32a, the second output row portion 32b, and the third output row portion 32c are all located below the front mounting surface of the radiator 10 and are concentrated in position, which is convenient for external output wiring.

[0185] Compared with Examples 1 to 4, the power component provided in this embodiment arranges the single-phase switch tube groups 40 in parallel, so that the current loop distances between the three single-phase switch tube groups 40 and the capacitor bus 50 are consistent, thereby improving the balance of the current loop from the capacitor bus 50 to each single-phase switch tube group 40 and reducing stray inductance.

[0186] Example 6

[0187] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0188] For an introduction to the heat sink 10 , the capacitor module and the power module, please refer to Example 1.

[0189] The following describes the layout of the switch tubes 20 in the power assembly.

[0190] In this embodiment, a liquid cooling radiator is used. The liquid cooling radiator can provide higher heat dissipation efficiency, and more switching tubes 20 can be stacked in one liquid cooling radiator. The liquid cooling radiator is generally a plate-shaped component, and both sides of the liquid cooling radiator can form a mounting surface.

[0191] As an optional embodiment, the three single-phase switch tube groups 40 are divided into two parts and are respectively installed on the two mounting surfaces of the radiator 10, and the switch modules on each mounting surface are arranged side by side in the left and right directions. In this embodiment, the two mounting surfaces are parallel to the connecting portion. The mounting surface and the connecting portion referred to here are parallel, which can be regarded as the flat radiator 10 and the flat capacitor busbar 50 being arranged in a stacked manner. In this way, the volume of the radiator 10 can be reduced, the space utilization of the radiator 10 can be further improved, and the overall volume of the power component can be reduced.

[0192] The above content is further explained below.

[0193] Among them, a complete single-phase switch tube group 40 is located on the front mounting surface of the radiator 10, and another complete single-phase switch tube group 40 is located on the rear mounting surface of the radiator 10. In the last single-phase switch tube group 40, each switch module is evenly divided into two parts, and the switch modules in each part are arranged side by side. The two parts are respectively located on the front mounting surface and the rear mounting surface of the radiator 10.

[0194] Reference Figure 9a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 in this embodiment, and shows the corresponding directions. Figure 9b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 9a The direction shown is the direction when looking at the front mounting surface of the radiator 10 from the front side of the radiator 10, that is, Figure 9a Directions shown are for guidance only Figure 9a Orientation of the front-side view in .

[0195] Reference Figure 9a In this embodiment, four switch modules form a single-phase switch tube group 40, and the three single-phase switch tube groups 40 are respectively a first phase 41, a second phase 42, and a third phase 43. The first phase 41 and the second phase 42 include four switch modules arranged in parallel, and the third phase 43 is divided into a third-phase first part 43a and a third-phase second part 43b, each of which includes two switch modules arranged in parallel. The first phase 41 and the third-phase first part 43a are located on the front mounting surface of the radiator 10, and the second phase 42 and the third-phase second part 43b are located on the rear mounting surface of the radiator 10. On the front mounting surface of the radiator 10, the first phase 41 and the third-phase first part 43a are arranged in parallel in the left-right direction; on the rear mounting surface of the radiator 10, the second phase 42 and the third-phase second part 43b are arranged in parallel in the left-right direction.

[0196] In the first phase 41 and the second phase 42, the four switch modules are arranged in parallel in the left-right direction, so the output end and the input end of each switch module are also arranged in parallel. At this time, the input ends of the four switch modules jointly form the input end of the single-phase switch tube group 40, and the output ends of the four switch modules jointly form the output end of the single-phase switch tube group 40.

[0197] In the third phase 43, the four switch modules are divided into two parts, and the two switch modules in each part are arranged in parallel along the left-right direction. Therefore, the output end and the input end of each switch module in each part are also arranged in parallel. At this time, the input ends of the two switch modules in each part jointly form the input end of the part, and the output ends of the two switch modules in each part jointly form the output end of the part.

[0198] Reference Figure 9a , the input ends of the first phase 41, the second phase 42, and the third phase 43 are all located at the top. When installed on the heat sink 10, the input ends of the first phase 41, the second phase 42, and the third phase 43 all correspond to the upper edge of the heat sink 10, and the output ends correspond to the lower edge of the heat sink 10. At the same time, each single-phase switch tube group 40 is connected to the capacitor busbar 50 through the input bar 31, and each is connected to an output bar 32. Therefore, an input bar 31 can be set along the upper edge of the heat sink 10, and the input bar 31 is connected to the input ends of the first phase 41, the second phase 42, and the third phase 43 at the same time; and three output bars 32 can be set along the lower edge of the heat sink 10, namely the output bar first part 32a, the output bar second part 32b, and the output bar third part 32c, which are respectively connected to the output ends of the first phase 41, the second phase 42, and the third phase 43.

[0199] Among them, for the output row third part 32c, since the third phase 43 is divided into the third phase first part 43a and the third phase second part 43b, and the two are respectively located on the front mounting surface and the rear mounting surface of the radiator 10, and the output row third part 32c needs to be connected to the output ends of the third phase first part 43a and the third phase second part 43b at the same time, the output row third part 32c can be bypassed around the right edge of the radiator 10. At this time, the output row third part 32c can be connected to the output ends of the third phase first part 43a and the third phase second part 43b at the same time.

[0200] Reference Figure 9b The capacitor busbar 50 is located on the rear side of the radiator 10, and the three single-phase switch tube groups 40 are installed on the front mounting surface and the rear mounting surface of the radiator 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, and the commutation loop length of each switch module is also equal, the stray inductance is reduced, and the switching loss is reduced accordingly.

[0201] Reference Figure 9b Since the input ends of the three single-phase switch tube groups 40 are all located at the upper edge of the heat sink 10, only one input bus 31 is needed to connect to the capacitor bus 50. Therefore, the distance between each single-phase switch tube group 40 and the capacitor bus 50 is equal, and the current loop distances between the three single-phase switch tube groups 40 and the capacitor bus 50 are consistent. Regardless of the direction of the current from the capacitor bus 50, the time it reaches each single-phase switch tube group 40 is also equal, thus achieving the best current loop balance. At the same time, referring to Figure 9b The input end of the second phase 42 can be connected in parallel with the input bus 31 connected to the input end of the first phase 41 and then connected to the capacitor bus 50, thereby reducing the total length of the input bus 31, reducing manufacturing costs, and reducing stray inductance.

[0202] The first output row portion 32a, the second output row portion 32b, and the third output row portion 32c are all located at the lower edge of the heat sink 10 and are concentrated in position, which is convenient for external output wiring.

[0203] Compared to Examples 1 through 4, the power assembly provided in this embodiment further improves the balance of the current loop from the capacitor busbar 50 to the individual single-phase switch tube groups 40 by arranging them in parallel. This reduces stray inductance. Furthermore, compared to Example 5, the arrangement of the switch tubes 20 on the front and rear sides of the heat sink 10 further reduces the size of the heat sink 10, improving surface space utilization and reducing the overall volume of the power assembly.

[0204] Example 7

[0205] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0206] For an introduction to the capacitor module and the power module, please refer to Example 1. The following only describes the difference between the two.

[0207] The following describes the layout of the switch tubes 20 in the power assembly.

[0208] As an optional embodiment, three single-phase switch tube groups 40 are respectively installed on three heat sinks 10. In this way, the heat dissipation capacity requirement of each heat sink 10 is reduced, thereby reducing the cost of the heat sink 10.

[0209] Furthermore, in the power module, each single-phase switch tube group is arranged in parallel on the heat sink 10, and the arrangement direction of each single-phase switch tube group is parallel to the connection portion; in each single-phase switch tube group, the arrangement direction of each switch module is consistent with the arrangement direction of each single-phase switch tube group. In each single-phase switch tube group 40, the arrangement direction of each switch module is parallel to the connection portion of the capacitor busbar 50. This ensures that the distance from each switch module to the capacitor busbar 50 in each single-phase switch tube group 40 is equal, avoiding the problem of inconsistent commutation circuit lengths of switch modules in different positions in each single-phase switch tube group 40.

[0210] Furthermore, the three single-phase switch tube groups 40 are all installed on a mounting surface of the radiator 10. In the present embodiment, the mounting surface is parallel to the connecting portion. The mounting surface and the connecting portion referred to here are parallel to each other and can be regarded as being arranged in a stacked manner between the flat plate-shaped radiator 10 and the flat plate-shaped capacitor busbar 50. When the mounting surface is located on the front side of the radiator 10, it is convenient to maintain the three unidirectional switch modules, and when another mounting surface is formed on the other side of the radiator 10, the other mounting surface of the radiator 10 can be used to quickly dissipate heat and improve the heat dissipation efficiency. In the present embodiment, the three single-phase switch tube groups 40 are installed on the front mounting surface of the radiator 10, but in other embodiments, the three single-phase switch tube groups 40 can also be installed on the rear mounting surface of the radiator 10. When installed on the rear mounting surface, the various switch tubes 20 and the input row 31 and the output row 32 can be arranged with reference to the layout described in the present embodiment.

[0211] The above content is further explained below.

[0212] Specifically, refer to Figure 10a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 and shows the corresponding directions. Figure 10b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 10a The direction shown is the direction from the front of the radiator 10 , when viewed toward the front mounting surface of the radiator 10 .

[0213] Reference Figure 10a In this embodiment, the radiator 10 includes a first sub-radiator 10a, a second sub-radiator 10b, and a third sub-radiator 10c, which are arranged side by side in the left-right direction. In this embodiment, the radiator 10 is a liquid cooling radiator.

[0214] In this embodiment, four switch modules form a single-phase switch group 40. The three single-phase switch groups 40 are respectively for the first phase 41, the second phase 42, and the third phase 43. The first phase 41, the second phase 42, and the third phase 43 each include four switch modules arranged in parallel along the left-right direction. Within each switch module, the output and input ends of each switch module are also arranged in parallel. In this case, the input ends of the four switch modules collectively form the input end of the single-phase switch group 40, and the output ends of the four switch modules collectively form the output end of the single-phase switch group 40.

[0215] Reference Figure 10a In each single-phase switch assembly 40, the arrangement direction of the four switch modules corresponds to the extension direction of the single-phase switch assembly 40 and the extension direction of the heat sink 10. In this embodiment, the single-phase switch assembly 40 can be considered to extend in the left-right direction, and each heat sink 10 can also extend in the left-right direction. The aforementioned arrangement of the three switch modules in a side-by-side left-right direction can be understood as the three single-phase switch assemblies 40 being aligned in a line along their extension direction, that is, the three heat sinks 10 being aligned in a line along their extension direction.

[0216] Reference Figure 10a Each single-phase switching transistor group 40 is connected to the capacitor busbar 50 via an input row 31 and is also connected to an output row 32. The input and output ends of each phase of the three single-phase switching transistor groups 40 are located above and below, respectively. Therefore, an input row 31 can be provided along the upper edge of each heat sink 10, with the first input row portion 31a, the second input row portion 31b, and the third input row portion 31c corresponding to the single-phase switching transistor groups 40 for the first phase 41, the second phase 42, and the third phase 43, respectively. Simultaneously, three output rows 32 can be provided along the lower edge of each heat sink 10, with the first output row portion 32a, the second output row portion 32b, and the third output row portion 32c corresponding to the single-phase switching transistor groups 40 for the first phase 41, the second phase 42, and the third phase 43, respectively.

[0217] Reference Figure 10b The capacitor busbar 50 is located on the rear side of the radiator 10, and the three single-phase switch tube groups 40 are installed on the front mounting surface of the radiator 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, and the commutation loop length of each switch module is also equal, the stray inductance is reduced, and the switching loss is reduced accordingly.

[0218] Specifically, the first portion 31a of the input row includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50; the input row 31 also includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. Since the input ends of the three single-phase switch tube groups 40 are all located at the upper edge of their respective heat sinks 10, three input rows 31 are required to connect to the capacitor busbar 50. However, since the three single-phase switch tube groups 40 are arranged side by side in the left-right direction, the distance between each single-phase switch tube group 40 and the capacitor busbar 50 is equal, and the current loop distances between the three single-phase switch tube groups 40 and the capacitor busbar 50 are consistent. Regardless of the direction of the current in the capacitor busbar 50, the time when the current reaches each single-phase switch tube group 40 is also equal, thus achieving the best current loop balance.

[0219] The first output row portion 32a, the second output row portion 32b, and the third output row portion 32c are all located below the front mounting surface of the radiator 10 and are concentrated in position, which is convenient for external output wiring.

[0220] Compared with Examples 1 to 4, the power component provided in this embodiment arranges the single-phase switch tube groups 40 in parallel, so that the current loop distance between the three single-phase switch tube groups 40 and the capacitor bus 50 is consistent, thereby improving the balance of the current loop from the capacitor bus 50 to each single-phase switch tube group 40 and reducing stray inductance.

[0221] Example 8

[0222] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0223] For an introduction to the heat sink 10 , the capacitor module and the power module, please refer to Example 1.

[0224] The following describes the layout of the switch tubes 20 in the power assembly.

[0225] As an optional embodiment, the three single-phase switch tube groups 40 are divided into two parts to be respectively installed on the two mounting surfaces of each radiator 10, and the switch modules on each mounting surface are arranged side by side in the left and right directions. In this embodiment, the two mounting surfaces are parallel to the connecting portion. The mounting surface and the connecting portion referred to here are parallel, which can be regarded as the flat radiator 10 and the flat capacitor busbar 50 being arranged in a stacked manner. In this way, the volume of the radiator 10 can be reduced, the space utilization of the radiator 10 can be further improved, and the overall volume of the power component can be reduced.

[0226] The above content is further explained below.

[0227] Each single-phase switch tube group 40 is evenly divided into two parts, and the switch modules in each part are arranged in parallel. The two parts are respectively located on the front mounting surface and the rear mounting surface of the radiator 10.

[0228] Reference Figure 11a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 in this embodiment, and shows the corresponding directions. Figure 11b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 11a The direction shown is the direction in front of the radiator 10, when observing toward the front mounting surface of the radiator 10, wherein, corresponding to the illustration of each single-phase switch tube group 40, the part on the left is the front side, and the part on the right is the rear side.

[0229] Reference Figure 10a In this embodiment, the radiator 10 includes a first sub-radiator 10a, a second sub-radiator 10b, and a third sub-radiator 10c, which are arranged side by side in the left-right direction. In this embodiment, the radiator 10 is a liquid cooling radiator.

[0230] Reference Figure 11a In this embodiment, four switch modules form a single-phase switch tube group 40. The three single-phase switch tube groups 40 are respectively for the first phase 41, the second phase 42, and the third phase 43. In each of the first phase 41, the second phase 42, and the third phase 43, the four switch modules are divided into two parts. The two switch modules in each part are arranged side by side in the left-right direction. Therefore, the output and input ends of each switch module in each part are also arranged side by side. In this case, the input ends of the two switch modules in each part jointly form the input end of the part, and the output ends of the two switch modules in each part jointly form the output end of the part.

[0231] In this embodiment, the first phase 41 is divided into a first-phase first portion 41a and a first-phase second portion 41b, the second phase 42 is divided into a second-phase first portion 42a and a second-phase second portion 42b, and the third phase 43 is divided into a third-phase first portion 43a and a third-phase second portion 43b. The first portions of the first phase 41, the second phase 42, and the third phase 43 are all located on the front mounting surface of their respective heat sinks 10, and the second portions of the first phase 41, the second phase 42, and the third phase 43 are all located on the rear mounting surface of their respective heat sinks 10. Furthermore, the input ends of the first and second portions of each phase are located at the top, and the output ends are located at the bottom. When mounted on the heat sink 10, the input ends of the first phase 41, the second phase 42, and the third phase 43 correspond to the top edge of their respective heat sinks 10, and the output ends correspond to the bottom edge of their respective heat sinks 10.

[0232] At the same time, each single-phase switching transistor group 40 is connected to the capacitor busbar 50 via an input busbar 31 and is also connected to an output busbar 32. The input and output ends of each phase of the three single-phase switching transistor groups 40 are located at the top and bottom, respectively. Therefore, an input busbar 31 can be provided along the upper edge of each heat sink 10, with the corresponding single-phase switching transistor groups 40 for the first phase 41, the second phase 42, and the third phase 43 being the first input busbar portion 31a, the second input busbar portion 31b, and the third input busbar portion 31c, respectively. Simultaneously, three output busbars 32 can be provided along the lower edge of each heat sink 10, with the corresponding single-phase switching transistor groups 40 for the first phase 41, the second phase 42, and the third phase 43 being the first output busbar portion 32a, the second output busbar portion 32b, and the third output busbar portion 32c, respectively.

[0233] Among them, since each phase is divided into two parts located on the front mounting surface and the rear mounting surface of the radiator 10, and the input row 31 and output row 32 of each phase need to be connected to each switch module in the phase at the same time, the input row 31 can be made to bypass the upper edge of the radiator 10 to connect the switch modules on the front and rear sides of the radiator 10, and the output row 32 can be made to bypass the lower edge of the radiator 10 to connect the switch modules on the front and rear sides of the radiator 10.

[0234] Reference Figure 11b The capacitor busbar 50 is located on the rear side of the radiator 10, and the three single-phase switch tube groups 40 are installed on the front mounting surface and the rear mounting surface of their respective radiators 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, and the commutation loop length of each switch module is also equal, the stray inductance is reduced, and the switching loss is reduced accordingly.

[0235] Specifically, the first portion 31a of the input row includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50; the input row 31 also includes a positive plate, a center plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. Since the input ends of the three single-phase switch tube groups 40 are all located at the upper edge of their respective heat sinks 10, three input rows 31 are required to connect to the capacitor busbar 50. However, since the three single-phase switch tube groups 40 are arranged side by side in the left-right direction, the distance between each single-phase switch tube group 40 and the capacitor busbar 50 is equal, and the current loop distances between the three single-phase switch tube groups 40 and the capacitor busbar 50 are consistent. Regardless of the direction of the current in the capacitor busbar 50, the time when the current reaches each single-phase switch tube group 40 is also equal, thus achieving the best current loop balance.

[0236] The first output row portion 32a, the second output row portion 32b, and the third output row portion 32c are all located below the front mounting surface of the radiator 10 and are concentrated in position, which is convenient for external output wiring.

[0237] Compared to Examples 1 through 4, the power assembly provided in this embodiment further improves the balance of the current loop from the capacitor busbar 50 to the individual single-phase switch tube groups 40 by arranging them in parallel. This reduces stray inductance. Furthermore, compared to Example 7, the arrangement of the switch tubes 20 on the front and rear sides of the heat sink 10 further reduces the size of the heat sink 10, improving surface space utilization and reducing the overall volume of the power assembly.

[0238] Example 9

[0239] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0240] For an introduction to the heat sink 10 , the capacitor module and the power module, please refer to Example 1.

[0241] The following describes the layout of the switch tubes 20 in the power assembly.

[0242] As an optional embodiment, three single-phase switch tube groups 40 are all installed on one heat sink 10. In this way, since there is no need to set up multiple heat sinks 10 as described in the background art, the overall volume of the power component can be effectively reduced.

[0243] Furthermore, in the power module, each single-phase switch tube group is arranged in parallel on the heat sink 10, and the arrangement direction of each single-phase switch tube group is parallel to the connection portion; in each single-phase switch tube group, the arrangement direction of each switch module is consistent with the arrangement direction of each single-phase switch tube group. In each single-phase switch tube group 40, the arrangement direction of each switch module is parallel to the connection portion of the capacitor busbar 50. This ensures that the distance from each switch module to the capacitor busbar 50 in each single-phase switch tube group 40 is equal, avoiding the problem of inconsistent commutation circuit lengths of switch modules in different positions in each single-phase switch tube group 40.

[0244] Furthermore, the three single-phase switch tube groups 40 are divided into two parts and are respectively installed on the two mounting surfaces of the radiator 10. The switch modules on each mounting surface are arranged side by side in the left-right direction. In this embodiment, the two mounting surfaces are parallel to the connecting portion. The mounting surface and the connecting portion referred to here can be regarded as being parallel to each other, and the flat-plate radiator 10 and the flat-plate capacitor busbar 50 are arranged in a stacked manner. In this way, the volume of the radiator 10 can be reduced, the space utilization of the radiator 10 can be further improved, and the overall volume of the power component can be reduced.

[0245] The above content is further explained below.

[0246] In each single-phase switching tube group 40, the output tubes 22 of the switching module are located on the front mounting surface of the heat sink 10, and the input tubes 21 of the switching module are located on the rear mounting surface of the heat sink 10. In this layout, the term "parallel arrangement" means that in each single-phase switching tube group 40, the output tubes 22 are arranged side by side in the left-right direction, and the input tubes 21 are also arranged side by side in the left-right direction.

[0247] Reference Figure 12a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 in this embodiment, and shows the corresponding directions. Figure 12b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 12a The direction shown is the direction when looking at the front mounting surface of the radiator 10 from the front side of the radiator 10, that is, Figure 12a Directions shown are for guidance only Figure 12a Orientation of the front-side view in .

[0248] Reference Figure 12a In this embodiment, four switch modules form a single-phase switch tube group 40, with the three single-phase switch tube groups 40 being a first phase 41, a second phase 42, and a third phase 43. The first phase 41, the second phase 42, and the third phase 43 are each divided into two parts: a first-phase first part 41a and a first-phase second part 41b, a second-phase first part 42a and a second-phase second part 42b, and a third-phase first part 43a and a third-phase second part 43b. The first part of each phase corresponds to each input tube 21 in the single-phase switch tube group 40, and the second part of each phase corresponds to each output tube 22 in the single-phase switch tube group 40.

[0249] Reference Figure 12aIn each single-phase switch group 40, the input ends of the four switch modules collectively form the input end of the single-phase switch group 40, while the output ends of the four switch modules collectively form the output end of the single-phase switch group 40. In each phase, the first portion is located on the rear mounting surface of the heat sink 10, and the second portion is located on the front mounting surface of the heat sink 10. The first and second portions are connected by a connecting bar 33, which can be arranged to bypass the lower edge of the heat sink 10.

[0250] Reference Figure 12a Each single-phase switching transistor group 40 is connected to the capacitor busbar 50 via an input busbar 31 and is also connected to an output busbar 32. The input and output terminals of each phase of the three single-phase switching transistor groups 40 are located at the top. Therefore, an input busbar 31 can be provided along the upper edge of the heat sink 10 to connect all three single-phase switching transistor groups 40. Three output busbars 32 can also be provided along the upper edge of the heat sink 10, corresponding to the first phase 41, the second phase 42, and the third phase 43, namely the output busbar first portion 32a, the output busbar second portion 32b, and the output busbar third portion 32c.

[0251] Reference Figure 12b The capacitor busbar 50 is located on the rear side of the radiator 10, and the three single-phase switch tube groups 40 are installed on the front mounting surface and the rear mounting surface of the radiator 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, and the commutation loop length of each switch module is also equal, the stray inductance is reduced, and the switching loss is reduced accordingly.

[0252] Specifically, the first portion 31a of the input busbar includes a positive plate, a neutral plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. The input busbar 31 also includes a positive plate, a neutral plate, and a negative plate, which are stacked and connected to the corresponding plates of the capacitor busbar 50. Since the input ends of the three single-phase switch tube groups 40 are all located at the upper edge of the heat sink 10, only one input busbar 31 is required to connect to the capacitor busbar 50. Therefore, the distance between each single-phase switch tube group 40 and the capacitor busbar 50 is equal, and the current loop distances between the three single-phase switch tube groups 40 and the capacitor busbar 50 are consistent. Regardless of the direction of the current from the capacitor busbar 50, the time when the current reaches each single-phase switch tube group 40 is also equal, thus achieving optimal current loop balance.

[0253] The first output row portion 32a, the second output row portion 32b, and the third output row portion 32c are all located above the front mounting surface of the radiator 10 and are concentrated in position, which is convenient for external output wiring.

[0254] Compared to Examples 1 through 4, the power assembly provided in this embodiment further improves the balance of the current loop from the capacitor busbar 50 to the individual single-phase switch tube groups 40 by arranging them in parallel. This reduces stray inductance. Furthermore, compared to Example 7, the arrangement of the switch tubes 20 on the front and rear sides of the heat sink 10 further reduces the size of the heat sink 10, improving surface space utilization and reducing the overall volume of the power assembly.

[0255] Furthermore, in Example 3, since the three single-phase switching tube groups 40 are arranged in parallel in the vertical direction, one single-phase switching tube group 40 is necessarily located in the middle. This causes the input and output rows corresponding to this single-phase switching tube group 40 to occupy the surface space of the heat sink 10's mounting surface. This layout results in low surface space utilization of the heat sink 10 and prevents the overall volume of the power module from being compressed to its maximum. In this embodiment, the three single-phase switching tube groups 40 are arranged side by side in the horizontal direction. Although this increases the horizontal length of the power module, the input and output rows do not occupy the surface space of the heat sink 10's mounting surface. Therefore, the surface space utilization of the heat sink 10 is higher, further reducing the overall volume of the heat sink 10.

[0256] Furthermore, while the number of radiators 10 in this embodiment is one, in other embodiments, the number of radiators 10 can be set to three, with the three radiators 10 arranged in the left-right direction. A complete single-phase switch tube group 40 is correspondingly installed on each radiator 10. The wiring method of the single-phase switch tube group 40 can refer to the wiring method of each single-phase switch tube group 40 in this embodiment. However, when three radiators 10 are used, the connecting bar 33 in each single-phase switch tube group 40 can directly bypass the upper or lower edge of the radiator 10 on which it is located. Using three radiators 10 reduces the heat dissipation capacity requirements of a single radiator 10, can reduce the cost of the radiator 10, and also facilitates the wiring and maintenance of the single-phase switch tube group on each radiator 10.

[0257] Example 10

[0258] This embodiment provides a power component, which mainly includes a heat sink 10, a capacitor module and a power module.

[0259] For an introduction to the heat sink 10 , the capacitor module and the power module, please refer to Example 1.

[0260] The following describes the layout of the switch tubes 20 in the power assembly.

[0261] As an optional embodiment, the surface of the radiator 10 forms two mounting surfaces that are parallel to the connecting portion and are used to mount each single-phase switch tube group, one of which faces the connecting portion and the other faces away from the connecting portion; an input tube and an output tube in each switch module are both mounted on the same mounting surface, and the other input tubes are both mounted on another mounting surface. In this way, since there is no need to set up multiple radiators 10 as in the background technology, the overall volume of the power component can be effectively reduced. In this embodiment, both mounting surfaces are parallel to the connecting portion. The mounting surface referred to here as being parallel to the connecting portion can be regarded as being arranged in a stacked manner between the flat-plate radiator 10 and the flat-plate capacitor busbar 50.

[0262] Furthermore, in each single-phase switch group 40, the layout direction of each switch module is parallel to the connection portion of the capacitor busbar 50. This ensures that the distance between each switch module and the capacitor busbar 50 in each single-phase switch group 40 is equal, avoiding the problem of inconsistent commutation loop lengths of switch modules at different locations in each single-phase switch group 40.

[0263] Furthermore, in each single-phase switch tube group, the input tubes or output tubes located on the same mounting surface are arranged in parallel along the left-right direction corresponding to each other, and the two input tubes and output tubes in each switch module are connected by a connecting row 33; the connecting row 33 passes through the heat sink 10 to connect the input tubes and output tubes located on their respective mounting surfaces.

[0264] Furthermore, each single-phase switch tube group is arranged side by side on the heat sink 10 in a horizontal direction. In each switch module, the input tube and output tube installed on the same mounting surface are arranged in a vertical direction, and the two input tubes are positioned correspondingly. In each switch module, the input ends of the two input tubes point in the same direction and are connected to the same input bar. In each switch module, the input ends of the input tubes and the output ends of the output tubes installed on the same mounting surface are separated.

[0265] The above content is further explained below.

[0266] Specifically, refer to Figure 13a , which shows the layout of the three single-phase switch tube groups 40 on the radiator 10 and shows the corresponding directions. Figure 13b , which shows the configuration of the layout when viewed from the side, and shows the corresponding directions. It should be noted that Figure 13a The direction shown is the direction when looking at the front mounting surface of the radiator 10 from the front side of the radiator 10, that is, Figure 13a Directions shown are for guidance only Figure 13a Orientation of the front-side view in .

[0267] Reference Figure 13aIn this embodiment, four switch modules form a single-phase switch tube group 40, with the three single-phase switch tube groups 40 being a first phase 41, a second phase 42, and a third phase 43. The first phase 41, the second phase 42, and the third phase 43 are each divided into two parts: a first-phase first part 41a and a first-phase second part 41b, a second-phase first part 42a and a second-phase second part 42b, and a third-phase first part 43a and a third-phase second part 43b. The first part of each phase corresponds to one input tube 21 and one output tube 22 of the single-phase switch tube group 40, and the second part of each phase corresponds to the other input tube 21 of the single-phase switch tube group 40.

[0268] Reference Figure 13a In each single-phase switch tube group 40, the input ends of the two input tubes 21 of the four switch modules jointly form the input end of the single-phase switch tube group 40, and the output ends of the four switch modules jointly form the output end of the single-phase pair group.

[0269] The first phase 41, second phase 42, and third phase 43 are arranged in a row on the radiator 10 along the left-right direction. The first portion 41a of the first phase is located on the front mounting surface of the radiator 10, the second portion 41b of the first phase is located on the rear mounting surface of the radiator 10, the first portion 42a of the second phase is located on the front mounting surface of the radiator 10, the second portion 42b of the second phase is located on the rear mounting surface of the radiator 10, the first portion 43a of the third phase is located on the front mounting surface of the radiator 10, and the second portion 43b of the third phase is located on the rear mounting surface of the radiator 10. This leaves a free mounting surface at the bottom of the rear mounting surface of the radiator 10 where the switching tube 20 is not located, thereby improving the heat dissipation efficiency of the radiator 10.

[0270] Among them, the input pipe 21 of the first part 41a of the first phase is located at the upper position of the front mounting surface of the radiator 10, and the output pipe 22 of the first part 41a of the first phase is located at the lower position of the front mounting surface of the radiator 10, and is located directly below its corresponding input pipe 21; the input pipe 21 of the second part 41b of the first phase is located at the upper position of the rear mounting surface of the radiator 10, and its position corresponds to the position of the input pipe 21 of the first part 41a of the first phase. The input pipe 21 and the output pipe 22 of the first phase first part 41a are connected by a connecting row 33; at the same time, the output pipe 22 of the first phase first part 41a and the input pipe 21 of the first phase second part 41b are also connected by a connecting row 33. Here, since the output pipe 22 of the first phase first part 41a and the input pipe 21 of the first phase second part 41b are located on different mounting surfaces of the radiator 10, an opening can be set at the corresponding position of the radiator 10, and the connecting row 33 can be passed through the opening to connect the output pipe 22 of the first phase first part 41a and the input pipe 21 of the first phase second part 41b.

[0271] Reference Figure 13a Each single-phase switch tube group 40 is connected to the capacitor busbar 50 through the input bar 31, and each is connected to an output bar 32. Since the input ends of the first phase 41, the second phase 42 and the third phase 43 are all located at the top, that is, corresponding to the upper edge of the heat sink 10, only one input bar 31 is required. Figure 13b Since the two input pipes 21 in each phase are respectively located on the front mounting surface and the rear mounting surface of the radiator 10 , the structure of the input row 31 in this embodiment is different from that in Embodiments 1 to 9.

[0272] refer to Figure 13b The capacitor busbar 50 is located on the rear side of the heat sink 10, and the extension direction of the input busbar 31 is parallel to the plate surface of the capacitor busbar 50; in this way, in each single-phase switch tube group 40, the distance between each switch module and the capacitor busbar 50 through the input busbar 31 is equal, and the commutation loop length of each switch module is also equal, the stray inductance is reduced, and the switching loss is reduced accordingly. As for the input row 31, it includes a positive plate, a neutral plate and a negative plate. Taking the first phase 41 as an example, in this embodiment, the input tube 21 of the first part 41a of the first phase is connected to the positive plate and the neutral plate of the input row 31, and the input tube 21 of the second part 41b of the first phase is connected to the negative plate and the neutral plate of the input row 31. At this time, the positive plate and the neutral plate of the input row 31 need to be wrapped around the front side of the radiator 10 to be connected to the input tube 21 of the first part 41a of the first phase. The positive plate and the neutral plate of the input row 31 can be stacked; and the input tube 21 of the second part 41b of the first phase can be directly connected to the negative plate and the neutral plate of the capacitor busbar 50. Here, the input tube 21 of the first phase second portion 41b can be connected to the negative plate and neutral plate of the capacitor busbar 50 via a terminal block or terminal block. These terminals and terminal blocks still fall under the category of input busbar 31, but they do not need to be stacked with the positive plate and neutral plate of input busbar 31, thereby reducing the manufacturing cost of input busbar 31. Furthermore, with this layout configuration, the commutation loop of the power module is shortened, and the overall stray inductance is low. Even without stacking the three plates of input busbar 31, the requirements can still be met.

[0273] Similarly, the input busbars 31 of the second phase 42 and the third phase 43 also use the aforementioned wiring method. Furthermore, the first phase 41, the second phase 42, and the third phase 43 share the same input busbar 31. Because the input terminals of the three single-phase switch tube groups 40 are all located at the upper edge of the heat sink 10, only one input busbar 31 is required to connect to the capacitor busbar 50. Consequently, the distance between each single-phase switch tube group 40 and the capacitor busbar 50 is equal, and the current loop distances between the three single-phase switch tube groups 40 and the capacitor busbar 50 are consistent. Regardless of the direction of the current flowing through the capacitor busbar 50, the current reaches each single-phase switch tube group 40 at the same time, resulting in optimal current loop balance.

[0274] The first output row portion 32a, the second output row portion 32b, and the third output row portion 32c are all located below the front mounting surface of the radiator 10 and are concentrated in position, which is convenient for external output wiring.

[0275] The power component provided in this embodiment shortens the overall commutation loop of the three-level topology and reduces the generation of stray inductance by arranging the two input tubes 21 in the switch module on the front and rear sides of the heat sink 10 respectively; and arranges each single-phase switch tube group 40 in parallel, so that the current loop distance between the three single-phase switch tube groups 40 and the capacitor busbar 50 is consistent, thereby improving the balance of the current loop from the capacitor busbar 50 to each single-phase switch tube group 40.

[0276] At the same time, compared with Example 9, the power component provided in this embodiment also has the following advantages:

[0277] In Example 9, the switch modules are arranged side by side in the left-right direction, causing the power module to be too long in the left-right direction. This may not only cause certain difficulties in actual implementation, but also affect the radiator 10. Since the radiator 10 is a liquid-cooled radiator, it needs to be filled with coolant. If the coolant is introduced at the left or right end of the radiator 10, the other end of the radiator 10 is too far away from the coolant inlet, resulting in a decrease in temperature uniformity at different positions of the radiator 10. If the coolant is introduced at the top or bottom end of the radiator 10, the coolant pipeline will interfere with the input row 31 or output row 32 of the power module.

[0278] In this embodiment, in each switch module, an input tube and an output tube are arranged on the mounting surface in the vertical direction, and then the switch modules are arranged side by side in the left and right directions, which shortens the size of the power module in the left and right directions and increases the size of the power module in the up and down directions. This will make the size of the power module in the left and right directions and the up and down directions more balanced. In addition to the advantage of being convenient for actual implementation, the radiator 10 can also choose to introduce coolant at the left end or the right end. Since the size in the left and right directions is shortened, the coolant can obtain better performance release at each position of the radiator 10, and the overall temperature uniformity of the radiator 10 is better.

[0279] Moreover, when there are three switch tubes 20 in the switch module, a spare portion is reserved at the lower position of the rear mounting surface in this embodiment. When the coolant flow channel is actually designed, the upper half of the radiator 10 can be designed as the coolant inlet channel, and the lower half can be designed as the coolant return channel. The coolant temperature in the coolant inlet channel is relatively low, which can just improve the cooling efficiency of the input tube 21 with a higher temperature release, while the coolant temperature in the coolant return channel is relatively high, which will not affect the cooling effect of the output tube 22 with a lower temperature release.

[0280] Example 11

[0281] This embodiment is a further refinement of the embodiment 10. In this embodiment, the same layout as that of the single-phase switch tube groups 40 in the embodiment 10 is adopted, with the only difference being that each single-phase switch tube group 40 in this embodiment is composed of three switch modules.

[0282] The power component provided in this embodiment is further described below.

[0283] Reference Figure 14 , which shows the structure of the heat sink 10, the switch tube 20, the input row 31, the output row 32, the capacitor busbar 50 and the connecting row 33 in the power component provided by this embodiment.

[0284] Reference Figure 15 and Figure 16 In the power assembly provided in this embodiment, three switch modules form a single-phase switch group 40. A total of nine switch modules form three single-phase switch groups 40. Each single-phase switch group 40 outputs single-phase AC power through a corresponding output row 32. The three switch modules in each single-phase switch group 40 have two input tubes 21 located on the front and rear mounting surfaces of the heat sink 10, respectively, and positioned above the heat sink 10. The output tube 22 is located on the front mounting surface of the heat sink 10 and positioned below the heat sink 10. A connecting row 33 connects the input tube 21 and the output tube 22 located on the front mounting surface of the heat sink 10. Another connecting row 33 connects the input tube 21 and the output tube 22 located on the rear mounting surface of the heat sink 10. This connecting row 33 passes through an opening provided in the heat sink 10 to connect the heat sink 10 to the front and rear sides.

[0285] Reference Figure 17 In the power component provided in this embodiment, the capacitor busbar 50 includes three plates, namely the capacitor busbar positive plate 51, the capacitor busbar center plate 52 and the capacitor busbar negative plate 53. Figure 17In the direction shown, the three plates are, from back to front, the capacitor busbar positive plate 51 , the capacitor busbar center plate 52 and the capacitor busbar negative plate 53 , which are stacked, with the capacitor busbar negative plate 53 closest to the radiator 10 .

[0286] The input busbar 31 also includes three parts: an input busbar positive plate 311, an input busbar centerline plate 312, and an input busbar terminal 313. In this embodiment, the terminals of the input tubes 21 located on the front mounting surface of the radiator 10 are adapted to connect to the capacitor busbar positive plate 51 and the capacitor busbar centerline plate 52. Therefore, one end of the input busbar positive plate 311 and the input busbar centerline plate 312 are connected to the capacitor busbar positive plate 51 and the capacitor busbar centerline plate 52, while the other ends extend to the front of the radiator 10 and connect to the input tubes 21 in each switch module. At the same time, the terminal of the input tube 21 located on the mounting surface on the rear side of the radiator 10 is suitable for connection with the capacitor busbar centerline plate 52 and the capacitor busbar negative plate 53, and there is no radiator 10 blocking the capacitor busbar 50 and the input tube 21. Therefore, the negative terminal of the input tube 21 can be directly connected to the capacitor busbar negative plate 53 using the input bus terminal 313, and the centerline terminal of the input tube 21 can be connected to the capacitor busbar centerline plate 52 at the same time.

[0287] The connecting row 33 includes two parts, namely a first connecting row part 331 and a second connecting row part 332, wherein the first connecting row part 331 connects the input pipe 21 and the output pipe 22 located on the front mounting surface of the radiator 10, and the second connecting row part 332 connects the input pipe 21 located on the rear mounting surface of the radiator 10 and the output pipe 22 located on the front mounting surface of the radiator 10.

[0288] The radiator 10 used in this embodiment is a liquid-cooled radiator, which can effectively meet the heat dissipation requirements of the switching tube 20 .

[0289] Compared with Examples 1-9, the power component provided in this embodiment can not only reduce the overall volume of the heat sink 10, but also make the length and width of the heat sink 10 within an appropriate range, which is beneficial to the practical application of the power component. The input and output ends of each switching tube 20 are reasonably arranged, the stray inductance is effectively reduced, and it also has good current loop balance.

[0290] Example 12

[0291] Example 12 is based on Example 10, and the difference between the two is that in Example 12:

[0292] In each switch module, the input tube and output tube installed on the same mounting surface are arranged vertically, with the two input tubes staggered in position. In each switch module, the input ends of the two input tubes face away from each other. In each switch module, the input ends of the input tubes and the output ends of the output tubes installed on the same mounting surface face away from each other.

[0293] Reference Figure 18a and Figure 18b One input tube 21 is mounted on the upper portion of the front mounting surface of the radiator 10, with its input end located at the upper side; the other input tube 21 is mounted on the lower portion of the rear mounting surface of the radiator 10, with its input end located at the lower side. The connection between the input tube 21 on the front mounting surface and the input bus 31 can be referred to in Example 10. The input tube 21 on the rear mounting surface can be directly connected to the connection portion of the capacitor busbar 50 via a terminal block, for details see Example 11.

[0294] Example 13

[0295] Reference Figure 19 This embodiment is based on embodiment 10. The difference between the two is that in embodiment 13, the mounting surface formed by the heat sink 10 and the connecting portion have a certain inclination angle, and of the two mounting surfaces formed, one mounting surface faces upward relative to the capacitor busbar 50, and the other mounting surface faces downward relative to the capacitor busbar 50.

[0296] Specifically, the mounting surface formed by the heat sink 10 is perpendicular to the connection portion of the capacitor busbar 50, with one mounting surface facing upward and the other facing downward. Compared to Example 10, referring to the contents described in Example 11, the input tube 21 can be directly connected to the capacitor busbar via a terminal block, without the need for a copper busbar, etc., resulting in a simpler wiring. Moreover, in the same switch module, the two input tubes 21 are at the same distance from the capacitor busbar 50, and under the same conditions, the distance is shorter than that in Example 10, which can also better reduce stray inductance.

[0297] It should be understood that this layout is also applicable to the aforementioned embodiments 1-9, requiring only adaptive improvements to each embodiment. However, to improve the practical performance of this layout, it is preferred to improve upon a solution in which the input bus 31 is located at the edge of the heat sink 10 and three single-phase switch tube groups 40 are connected to the same input bus 31. This solution, because the input bus 31 is located at the edge, allows for direct connection to the capacitor busbar 50, reducing the length of the commutation circuit and thereby reducing stray inductance.

[0298] Example 14

[0299] This embodiment provides a converter, which includes a converter housing, in which the power component of any one of Embodiments 1 to 13 is installed.

[0300] The radiator 10 of the liquid-cooled converter is a liquid-cooled radiator.

[0301] The above description and embodiments are intended to explain the scope of protection of the present invention, but do not constitute a limitation thereto. Modifications, equivalent substitutions, or other improvements to the embodiments of the present invention or portions thereof that can be obtained by a person of ordinary skill in the art through logical analysis, reasoning, or limited experimentation based on the teachings of the present invention or the above embodiments, combined with common knowledge, ordinary technical knowledge in the field, and / or prior art, should all be included within the scope of protection of the present invention.

Claims

1. A power assembly comprising: A capacitor module comprises a DC capacitor pool and a capacitor busbar (50) connected to each other; the capacitor busbar (50) has a connecting portion; A power module, comprising an input row (31), an output row (32) and at least one switch tube group (40); each of the switch tube groups (40) comprises a plurality of switch modules and is connected to the input row (31) and the output row (32); the input row (31) is connected to the connecting portion; the output row (32) is used to output electric energy; the switch tubes (20) included in each of the switch modules are divided into input tubes (21) and output tubes (22) according to type; Its characteristics include: At least one heat sink (10) has two mounting surfaces formed on its surface, which are separated from each other and used to mount each switch tube group (40); each of the switch modules is divided into a part including only an input tube (21) and a part including only an output tube (22) according to the type of the switch tube (20); One of the two mounting surfaces faces the connecting portion, and the other faces away from the connecting portion; In each switch module, the switch tube (20) type portion that is an input tube (21) is installed on a mounting surface facing the capacitor busbar (50), and the switch tube (20) type portion that is an output tube (22) is installed on a mounting surface facing away from the capacitor busbar (50).

2. A power component according to claim 1, characterized in that: The two mounting surfaces are both parallel to the connecting portion.

3. A power component according to claim 2, characterized in that: In each switch tube group (40), the input tubes (21) and output tubes (22) of each switch module in each part are correspondingly arranged in parallel along the left-right direction, and the input tubes (21) and output tubes (22) in each switch module are connected via a connecting row (33).

4. A power component according to claim 3, characterized in that: The number of the radiator (10) is one, and the three switch tube groups (40) are sequentially arranged in the upper, middle and lower parts of the radiator (10) along the up-down direction; in the switch tube group (40) located at the upper and / or lower part of the radiator (10), the connecting row (33) bypasses the upper edge and / or lower edge of the radiator (10); in the switch tube group (40) located at the middle part of the radiator (10), the connecting row (33) passes through the radiator (10) along the front-back direction.

5. A power component according to claim 3, characterized in that: The number of the radiator (10) is one, and three switch tube groups (40) are sequentially arranged at the upper part, middle part, and lower part of the radiator (10) along the up-down direction; in the switch tube groups (40) located at the upper part, middle part, and / or lower part of the radiator (10), the connection row (33) passes through the radiator (10) along the front-to-back direction.

6. A power component according to claim 3, characterized in that: Each switch tube group (40) is arranged in parallel on the radiator (10) in the vertical direction; there are three radiators (10), which are arranged in the vertical direction, and each radiator (10) is correspondingly mounted with one switch tube group (40); in each switch tube group (40), the connecting row (33) bypasses the upper edge or the lower edge of the radiator (10) where it is located.

7. A power component according to claim 3, characterized in that: There is one radiator (10), and three switch tube groups (40) are arranged in parallel on the radiator (10) along the left-right direction, and the input ends of the three switch tube groups (40) are all connected to the same input row (31); in each of the switch tube groups (40), the connection row (33) bypasses the upper edge or the lower edge of the radiator (10) where it is located.

8. A power component according to claim 3, characterized in that: Each switch tube group (40) is arranged in parallel on the radiator (10) along the left-right direction; there are three radiators (10), and the three radiators (10) are arranged along the left-right direction. Each radiator (10) is correspondingly mounted with one switch tube group (40), and the input ends of the three switch tube groups (40) are all connected to the same input row (31); in each switch tube group (40), the connection row (33) bypasses the upper edge or the lower edge of the radiator (10) where it is located.

9. A liquid-cooled converter, characterized in that: The power component comprises the power component according to any one of claims 1 to 8, wherein the radiator (10) used is a liquid cooling radiator.

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