WO2018036355A1

WO2018036355A1 - Intelligent power module, motor controller, and vehicle

Info

Publication number: WO2018036355A1
Application number: PCT/CN2017/095723
Authority: WO
Inventors: 杨小华; 陈银; 严百强
Original assignee: 比亚迪股份有限公司
Priority date: 2016-08-24
Filing date: 2017-08-02
Publication date: 2018-03-01
Also published as: CN107786070B; CN107786070A

Abstract

An intelligent power module (10), a motor controller, and a vehicle. The intelligent power module (10) comprises a power electronic device (11), a heat dissipation device for the power electronic device (11), a drive board (13) used for driving the power electronic device (11), and a capacitor (14) connected to the power electronic device (11). The intelligent power module (10) is characterized in that: the heat dissipation device comprises a first radiator (12a) and a second radiator (12b), the power electronic device (11) is clamped between the first radiator (12a) and the second radiator (12b), and the power electronic device (11), the first radiator (12a) and the second radiator (12b) are fixed on the capacitor (14). The intelligent power module (10) has a high heat dissipation efficiency, and has the advantages of being standardized and easily scalable and being space-saving.

Description

Intelligent power modules, motor controllers and vehicles

Technical field

The present disclosure relates to the field of vehicles, and in particular to an intelligent power module, a motor controller, and a vehicle.

Background technique

The IGBT module is a modular semiconductor device in which an IGBT (Insulated Gate Bipolar Transistor) and a FWD (Freewheeling Diode) are packaged by a specific circuit bridge. It is used in rectification, inverter, frequency conversion, etc., and is widely used in rail transportation, home appliance energy conservation, wind power generation, solar photovoltaic, and new energy vehicles (such as electric vehicles).

Typically, in the field of electric vehicles, an IGBT module is usually provided in the motor controller to convert the direct current (DC) of the battery into an alternating current (AC) for driving the motor. Existing motor controllers typically include a housing and an IGBT module, an IGBT drive circuit board, an IGBT control circuit board, and a film capacitor disposed in the housing. The arrangement of each component in the box body is substantially the following structure: the IGBT module is fixed on the bottom plate of the box body, and the IGBT driving circuit board and the IGBT control circuit board are sequentially disposed above the IGBT module and connected to the IGBT module, and the film capacitor is located One side of the IGBT module is also fixed on the box body, and a DC terminal for electrically connecting the battery and an AC terminal for electrically connecting the motor are disposed on the side wall of the box body, and the film capacitor and the IGBT module are electrically connected in parallel to the DC terminal. Between the positive and negative poles, and the IGBT module is also connected to the AC terminal to output AC power to the motor. In addition, a fluid passage for the coolant to flow through is provided in the bottom plate of the tank to help the IGBT module to dissipate heat.

However, such a motor controller is often limited by the above-described structural arrangement. Since the IGBT module has only one surface that contacts the bottom plate of the case, the heat dissipation effect of the IGBT module is not satisfactory. When the power of the motor is large, the IGBT module will generate a large amount of heat when working for a long time, and the temperature of the IGBT module rises sharply. At this time, only one surface exchanges heat with the coolant in the bottom plate of the case. It is not possible to slow down the temperature rise of the IGBT module.

In addition, in the product design, after selecting a certain type of IGBT module, it is necessary to separately design a matching film capacitor, IGBT drive circuit board, heat sink and other components. Therefore, the research and development work usually involves electronic circuit design, structural design, Expertise in many fields, such as cooling system design, has very high requirements on the technical and experience of designers, and the workload is very large. In addition, when the same R&D personnel design different power products, the types of IGBT modules used are different. At this time, the entire product needs to be designed from the beginning, proofing, testing, and certification. It is very laborious and time-consuming, and the structure is not compact and takes up a lot of space. Moreover, when producing products of different powers, the production process and production process are also different, and there are many types of raw materials for stocking, and it is necessary to find different supply resources, which greatly increases the cost.

Public content

The purpose of the present disclosure is to provide an intelligent power module, a motor controller, and a vehicle, which have high heat dissipation efficiency, and also have the advantages of standardization, easy expansion, and space saving.

In order to achieve the above object, the present disclosure provides an intelligent power module, wherein the smart power module includes power electronics, a heat sink for the power electronic device, a driving board for driving the power electronic device, and the a capacitor connected to the power electronic device, the heat sink comprising a first heat sink and a second heat sink, the power electronics being clamped between the first heat sink and the second heat sink, and the power electronics A device is affixed to the capacitor together with the first heat sink and the second heat sink.

Based on the above technical solution, the present disclosure provides a motor controller including a case, wherein the motor controller further includes smart power provided in the box according to an embodiment of the present disclosure. And a control board for controlling the power electronic device of the smart power module, the control board is electrically connected to a driving board of the smart power module, and a capacitor of the smart power module is fixed to the box.

Based on the above technical solution, the present disclosure further provides a vehicle provided with a battery and a motor, wherein the vehicle is provided with a motor controller provided by the present disclosure, and the motor controller is electrically connected to the battery and the Between the motors.

Through the above technical solution, the smart power module provided by the present disclosure correspondingly sets the first heat sink and the second heat sink on two opposite sides of the power electronic device, so that both sides of the power electronic device can exchange heat with the heat sink. Improve heat dissipation efficiency. In addition, since the power electronic device, the first heat sink, and the second heat sink are fixed together on the capacitor, the four are actually formed as a whole and have a fixed power. In an actual application, the smart power module provided by the present disclosure having a certain power value may be selected according to the required power, and the required power value can be divisible by the power value inherent to the smart power module, in which case, It is only necessary to determine that several smart power modules are required to obtain the required power. Therefore, the advantages of standardization, scalability, and space saving of the intelligent power module provided according to the embodiments of the present disclosure greatly shorten the design development period, Manufacturing hours and costs. The motor controller and vehicle provided by the present disclosure include the smart power module provided by the present disclosure, and thus have the same advantages as described above.

Other features and advantages of the present disclosure will be described in detail in the detailed description which follows.

DRAWINGS

The drawings are intended to provide a further understanding of the disclosure, and are in the In the drawing:

1 is a perspective view of a smart power module provided in accordance with an embodiment of the present disclosure, in which a fixed plate is not shown;

Figure 2 is an exploded perspective view of the smart power module shown in Figure 1, in which the fixed plate is not shown;

3 is a perspective view from above of a motor controller provided in accordance with an embodiment of the present disclosure, wherein the housing and the fixed plate are not shown for ease of showing components therein;

4 is a perspective view from below of a motor controller provided in accordance with an embodiment of the present disclosure, wherein a case and a fixed plate are not shown for convenience of showing components therein;

5 is an exploded perspective view of a smart power module in accordance with another embodiment of the present disclosure, in which a fixed plate is shown;

6 is a perspective view from above of a motor controller provided in accordance with another embodiment of the present disclosure, wherein the housing is not shown for ease of showing the components therein, but a fixed plate is shown;

7 is a perspective view from below of a motor controller provided in accordance with another embodiment of the present disclosure, wherein the housing is not shown for ease of illustration of the components therein, but a fixed plate is shown.

Reference mark:

10 intelligent power modules;

11 power electronic device; 11a DC connection; 11b three-phase AC connection;

12a first heat sink; 12b second heat sink;

13 drive board;

14 capacitor; 14a positive connection; 14b negative connection; 141 pad; 142 connection hole; 143 fixed foot;

15a input tube; 15b output tube;

16a DC wire; 16b three-phase AC wire;

17 fixed plate;

18 fixed pull tabs.

detailed description

The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are not to be construed

In the present disclosure, the terminology nouns used herein, such as "above, below," refer to "above, below" of the corresponding components in FIG. 1 (or FIG. 2, FIG. 5), where not stated to the contrary. In addition, the term "side surface" or "side" as used in this disclosure refers to the side surface or side of the corresponding component in Figure 1; the "length direction" and "height direction" used are respectively in Figure 1 ( The left-right direction and the up-and-down direction in FIG. 2 and FIG. 5) are defined as a reference, and are only used to explain the present disclosure, and are not intended to be limiting.

According to a specific embodiment of the present disclosure, an intelligent power module 10 is provided. Referring to FIG. 1 , FIG. 2 and FIG. 5 , the smart power module 10 includes a power electronic device 11 , and a heat dissipation device of the power electronic device 11 . a driving board 13 for driving the power electronic device 11 and a capacitor 14 connected to the power electronic device 11, wherein The heat sink includes a first heat sink 12a and a second heat sink 12b, the power electronics 11 being clamped between the first heat sink 12a and the second heat sink 12b, and the power electronics 11, first The heat sink 12a and the second heat sink 12b are fixed together on the capacitor 14.

Therefore, the smart power module 10 according to the embodiment of the present disclosure correspondingly sets the first heat sink 12a and the second heat sink 12b on both sides of the power electronic device 11 so that the power electronic device 11 can be heat-dissipated on both sides. Improve heat dissipation efficiency. In addition, since the power electronic device 11, the first heat sink 12a and the second heat sink 12b are fixed together on the capacitor 14, the four are actually formed as a whole with a fixed power. In an actual application, the smart power module 10 according to an embodiment of the present disclosure having a certain power value may be selected according to the required power, and the required power value can be divisible by the power value inherent to the smart power module 10, In this case, it is only necessary to determine that several smart power modules 10 are required to obtain the required power. Therefore, the smart power module 10 provided according to the embodiment of the present disclosure has the advantages of standardization and easy expansion, thereby being greatly shortened. Design development cycle, manufacturing man-hours, and cost.

In a specific embodiment provided by the present disclosure, the capacitor 14 may be disposed on a side close to the first heat sink 12a (such as the embodiment shown in FIG. 1), or may be disposed on a side close to the second heat sink 12b (as shown in the figure). The embodiment shown in FIG. 5, the fixing plate 17 detachably connected to the capacitor 14 fixedly connects the first heat sink 12a and the second heat sink 12b together with the power electronic device 11 to the capacitor 14 to The power electronic device 11, the first heat sink 12a, the second heat sink 12b, and the capacitor 14 are formed in one body.

In a specific embodiment provided by the present disclosure, the first heat sink 12a and the second heat sink 12b may be implemented in any suitable manner, for example, according to a specific structure of the power electronic device 11, the first heat sink 12a and the second heat sink The 12b may be the same or different as long as it can be placed against the two opposite side surfaces of the power electronic device 11 to be able to clamp the power electronic device 11. It should be noted that the term "abutment" as used herein refers to a side surface of each of the first heat sink 12a and the second heat sink 12b (the side surface may be defined as an inner surface, and the outer side below) Corresponding to the corresponding side surfaces of the power electronic device 11, and preferably, the above-mentioned side surfaces of the first heat sink 12a and the second heat sink 12b can at least completely cover the respective sides of the power electronic device 11 The surface allows sufficient heat exchange between the power electronic device 11 and the heat sink.

Alternatively, and preferably, the first heat sink 12a, the second heat sink 12b, and the power electronic device 11 are disposed in parallel with each other, that is, the length direction, the height direction, and the thickness direction of the three are parallel to each other. In this case, the side surface of the first heat sink 12a or the second heat sink 12b is a surface extending simultaneously in the longitudinal direction and the height direction of the first heat sink 12a or the second heat sink 12b, defining one of them The side surface facing the power electronic device 11 is the above-described inner surface, and the other side surface is an outer surface that faces the capacitor 14, if any. In this case, while the heat exchange of the power electronic device 11 is satisfied, the thicknesses of the first heat sink 12a and the second heat sink 12b can be reduced as much as possible, thereby contributing to reducing the volume of the smart power module 10.

In addition, in order to promote heat exchange between the power electronic device 11 and the first heat sink 12a and the second heat sink 12b, the inner surface of the first heat sink 12a and the inner surface of the second heat sink 12b are respectively coated with a heat conductive material. For example, thermal grease to enhance heat exchange with the power electronics 11.

In particular embodiments provided by the present disclosure, power electronics 11 can have any suitable shape. Alternatively, and preferably, as specifically shown in FIG. 2, the power electronic device 11 has two opposite flat side surfaces, and the first heat sink 12a and the second heat sink 12b are both a flat tube, the heat sink further comprising an input tube 15a and an output tube 15b for flowing a cooling medium such as air, water or oil, the first heat sink 12a and the second heat sink 12b being fluidly connected in parallel Between the input pipe 15a and the output pipe 15b. In this case, the first heat sink 12a and the second heat sink 12b share one input pipe and one output pipe, which can reduce the number of pipes and benefit the reduction of the volume of the entire smart power module 10.

In this case, the fixing plate 17 may be disposed in two, and the two fixing plates 17 are respectively located outside the first heat sink 12a and the second heat sink 12b, and the upper edge and the lower edge of the fixing plate 17 may be respectively disposed Correspondingly, the side surface of the capacitor 14 may be provided with a connecting piece, and the connecting piece is provided with a corresponding connecting hole 142. When mounting, the two fixing plates 17 will be the first heat sink 12a and the second heat sink 12b. The power board 11 is held in the middle, and then the two fixing boards 17 are fixed to the capacitor 14 through the bolt assembly through the mounting holes on the two fixing plates 17 and the connecting holes 142 on the connecting sheets.

In the above embodiments, the input tube 15a and the output tube 15b may be provided in any suitable form. Alternatively, and preferably, the input tube 15a and the output tube 15b are parallel to each other and respectively located at both ends of the flat tube, and the input tube 15a and the output tube 15b are oriented toward the same side (ie, facing the first heat sink 12a). One side or the side facing the second heat sink 12b extends and is arranged such that the cooling medium therein flows in a direction substantially perpendicular to the side surface of the flat tube, wherein "here is substantially perpendicular to the flat tube" The side surface" is for constraining the arrangement of the input pipe 15a and the output pipe 15b, that is, to restrict the extending direction of the input pipe 15a and the output pipe 15b to be substantially perpendicular to the side surface of the flat pipe, so as to thereafter power the electronic device 11, A heat sink 12a, a second heat sink 12b, a capacitor 14 and a fixed plate 17 and the like are constrained between the input pipe 15a and the output pipe 15b, thereby making the structure of the smart power module more compact (described later in detail). The advantage of this arrangement is that for the motor controller to be described hereinafter, when it is necessary to set a plurality of intelligent power modules 10 to meet the actual power demand, the plurality of smart power modules 10 can share the same coolant input. The tube 15a or the coolant output tube 15b, and is capable of confining the power electronic device 11, the capacitor 14 to be described later, and the first and

second heat sinks

12a, 12b to the coolant inlet pipe 15a and the coolant outlet pipe Between 15b, not only can space be saved, the structure of the intelligent power module can be made more compact, but also the number of coolant pipes can be reduced, thereby correspondingly reducing the weight of the motor controller.

In addition, in the specific embodiment provided by the present disclosure, the capacitor 14 may have any desired shape. Preferably, the capacitor 14 is in the shape of a rectangular parallelepiped as shown in FIGS. 1 to 7, and its length direction and height direction are respectively related to power electronics. Device The length direction of 11 is parallel to the height direction. In a further embodiment of the present disclosure, the capacitor 14 may also have other shapes, such as a cylindrical shape, the axial direction of the cylindrical capacitor 14 may be parallel to the length direction of the power electronic device, the first heat sink 12a and The shape of the outer surface of the second heat sink 12b may be formed into a curved shape that matches the outer surface of the cylindrical capacitor 14 so as to be in contact with the outer surface of the capacitor 14 as much as possible and in close contact.

In addition, in the specific embodiment provided by the present disclosure, the driving board 13 may be covered on the power electronic device 11 and the capacitor 14, on the one hand, to facilitate electrical connection with the power electronic device 11, and on the other hand, to benefit from The overall volume of the small smart power module 10. It should be explained here that in the embodiment shown in FIGS. 1 to 7, the drive board 13 is located above the power electronics 11 and the capacitor 14, but in other embodiments (not shown), for example When the power electronic device 11 is positioned above the capacitor 14, the drive board 13 is located on one side of the capacitor 14 to be able to cover both the power electronics 11 and the capacitor 14. Therefore, "the driving board 13 may be overlaid on the power electronic device 11 and the capacitor 14" is not only understood as "the driving board 13 is located above the power electronic device 11 and the capacitor 14".

Further, the capacitor 14 may be disposed between the coolant input pipe 15a and the coolant output pipe 15b, as shown in FIGS. 1 and 5, and this arrangement has an advantage in that, in a vehicle controller to be described later, when setting is required When multiple intelligent power modules 10 can meet actual power requirements, referring to FIG. 3, FIG. 4, FIG. 6, and FIG. 7, one of the two adjacent smart power modules 10 can be placed against another capacitor. The second heat sink 12b (when the components in the smart power module 10 are arranged in the order of FIG. 2) or the first heat sink 12a (the components in the smart power module 10 are arranged in the order of FIG. 5) On the outer surface of the time). Thereby, heat exchange can be performed on both sides of the capacitor 14, thereby improving heat dissipation efficiency. In addition, an outer surface of the first heat sink 12a and an outer surface of the second heat sink 12b may be coated with a heat conductive material, for example, a thermal grease, to enhance heat exchange with the capacitor 14.

Moreover, in particular embodiments provided by the present disclosure, the capacitor 14 can be any suitable type of capacitor, preferably the capacitor 14 is a film capacitor.

Moreover, in the specific embodiment provided by the present disclosure, the power electronic device 11 may be any suitable power electronic device 11, preferably the power electronic device 11 is an IGBT module. In practical applications, the number of IGBT modules can be selected according to the required power. Therefore, in the specific implementation provided by the present disclosure, the IGBT modules may be one or multiple in parallel. For example, in the specific embodiments illustrated in Figures 1, 2, and 5, the IGBT modules are three in parallel. Each IGBT module includes a DC connection terminal 11a and a three-phase AC connection terminal 11b (not shown in FIG. 5), and the DC connection terminal 11a of each IGBT module is connected in parallel to the DC connection port of the capacitor 14 by a fastener (ie, The positive electrode connection port 14a and the negative electrode connection port 14b) are connected to a DC power source such as a battery. The three-phase AC terminal 11b of each IGBT module is used to output an alternating current after converting direct current to alternating current through the IGBT module. In addition, in order to facilitate the connection between the DC connection end 11a of the IGBT module and the DC connection port of the capacitor 14, and to fix the IGBT module relative to the capacitor 14 by means of the connection, the DC connection end 11a of the IGBT module can be electrically connected. A spacer 141 is disposed between the containers 14 so that the DC connection end 11a of the IGBT module can be connected to the DC connection port of the capacitor 14 through the spacer 141 by a fastener such as a bolt or a screw.

Based on the above technical solution, the present disclosure further provides a motor controller, the motor controller including a box, wherein the motor controller further includes an intelligent power module 10 provided by the present disclosure disposed in the box. And a control board (not shown) for controlling the power electronic device 11, the control board is electrically connected to the driving board 13, and the capacitor 14 is fixed to the case. For example, referring to FIG. 5, the capacitor 14 may be The first heat sink 12a and the second heat sink 12b can be fixed to the casing of the motor controller by the fixing tabs by being fixed to the casing of the motor controller by the fixing legs 143.

Preferably, the smart power module 10 can be arranged in plurality according to the actual required power rating of the motor controller, and the plurality of the smart power modules 10 are connected in parallel, and the combination in parallel enables the motor controller to have the required Rated power. Therefore, the smart power module 10 according to an embodiment of the present disclosure has the advantages of standardization and easy expansion, thereby greatly shortening the development cycle, reducing the production cost, and improving the production efficiency.

In addition, in the specific embodiment provided by the present disclosure, the smart power module 10 is preferably provided with a coolant input pipe 15a and a coolant output pipe 15b, and the plurality of the smart power modules 10 are arranged side by side, for example, as shown in FIG. 3 and As shown in FIG. 4, three intelligent power modules 10 are disposed in the motor controller shown in the figure, and are sequentially arranged in the coolant inlet pipe 15a and the coolant along the extending direction of the coolant inlet pipe 15a and the coolant outlet pipe 15b. The output tubes 15b are connected, and the three smart power modules 10 share the coolant input pipe 15a and the coolant output pipe 15b.

In addition, when the power electronic device 11 is an IGBT module, the box body is provided with a DC terminal and an AC terminal, and the capacitor and the IGBT module in the smart power module are connected in parallel to the anode of the DC terminal through the DC wire 16a. And the negative electrode, and the three-phase AC connection end 11b of the IGBT module in each of the intelligent power modules is connected through the three-phase AC wire 16b to be connected to the AC terminal, as shown in FIG. 3, FIG. 4, and FIG. 6 and shown in Figure 7.

In the above embodiment, the DC wire 16a and the three-phase AC wire 16b are both copper strips, so that not only the electrical connection but also a certain fixing effect can be achieved.

Based on the above technical solution, the present disclosure further provides a vehicle provided with a battery and an electric motor, wherein the vehicle is provided with a motor controller according to an embodiment of the present disclosure, and the motor controller is electrically connected to the battery Between the motor and the motor.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical idea of the present disclosure. These simple variations are all within the scope of the disclosure.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not be further described in various possible combinations.

In addition, any combination of various embodiments of the present disclosure may be made as long as it does not deviate from the idea of the present disclosure, and should also be regarded as the disclosure of the present disclosure.

Claims

An intelligent power module (10), characterized in that the intelligent power module (10) comprises a power electronic device (11), a heat sink of the power electronic device (11), and a device for driving the power electronic device ( a driving board (13) of 11) and a capacitor (14) connected to the power electronic device (11), the heat sink comprising a first heat sink (12a) and a second heat sink (12b), the power electronics A device (11) is sandwiched between the first heat sink (12a) and the second heat sink (12b), and the power electronic device (11) and the first heat sink (12a) and the second The heat sink (12b) is fixed together on the capacitor (14).
The intelligent power module (10) according to claim 1, wherein the capacitor (14) is disposed on a side of the first heat sink (12a) or the second heat sink (12b), detachably A fixing plate (17) connected to the capacitor (14) fixes the first heat sink (12a) and the second heat sink (12b) together with the power electronic device (11) to the capacitor ( 14).
The intelligent power module (10) of claim 1 wherein said power electronics (11) has two opposing flat side surfaces, said first heat sink (12a) and said second The heat sink (12b) is a flat tube, and the heat sink further includes an input tube (15a) and an output tube (15b) for cooling medium flow, the first heat sink (12a) and the second heat sink (12b) ) is fluidly connected in parallel between the input pipe (15a) and the output pipe (15b).
The intelligent power module (10) according to claim 3, wherein the input pipe (15a) and the output pipe (15b) are parallel to each other and respectively located at both ends of the flat pipe, and the input pipe ( 15a) and the outlet tube (15b) extend toward the same side and are arranged such that the cooling medium therein flows in a direction substantially perpendicular to the side surface of the flat tube.
The intelligent power module (10) according to claim 4, characterized in that the capacitor (14) is located between the input pipe (15a) and the output pipe (15b).
The intelligent power module (10) according to any of claims 2-5, characterized in that the drive board (13) is overlaid on the power electronics (11) and the capacitor (14).
The intelligent power module (10) according to claim 1, characterized in that the power electronic device (11) is an IGBT module, the IGBT module being a plurality of one or a parallel.
The intelligent power module (10) according to claim 7, wherein the IGBT modules are three in parallel, each of the IGBT modules comprising a DC connection terminal (11a) and a three-phase AC connection terminal (11b) The DC connection end (11a) of each of the IGBT modules is connected in parallel to a DC connection port of the capacitor (14) via a fastener, and the three-phase AC connection terminal (11b) is used to output three-phase AC power.
The intelligent power module (10) of claim 1 wherein said capacitor (14) is a film capacitor.
A motor controller, the motor controller comprising a case, wherein the motor controller further comprises an intelligent power module (10) according to any one of claims 1-9 disposed in the case And a control board for controlling the power electronics (11) of the intelligent power module (10), the control board being electrically connected to a driving board (13) of the intelligent power module (10), the intelligent power module The capacitor (14) of (10) is fixed in the casing.
The motor controller according to claim 10, characterized in that the intelligent power module (10) is provided in plurality, and a plurality of the smart power modules (10) are connected in parallel.
The motor controller according to claim 11, characterized in that the intelligent power module (10) of claim 10 is the intelligent power module (10) according to claim 5, and the plurality of intelligent power modules (10) Arranged side by side, and the input pipe (15a) and the output pipe (15b) of the smart power module (10) are shared.
The motor controller according to claim 11, wherein the intelligent power module (10) is the intelligent power module (10) according to claim 8, wherein the box is provided with a DC terminal and an AC terminal. The capacitor (14) and the IGBT module in the smart power module (10) are connected in parallel between the positive and negative terminals of the DC terminal through a direct current wire (16a), and each of the smart power modules (10) The three-phase AC connection terminal (11b) of the IGBT module is connected through a three-phase AC line (16b) to be connected to the AC terminal.
The motor controller according to claim 13, wherein said direct current wire (16a) and said three-phase alternating current wire (16b) are both copper strips.
A vehicle provided with a battery and a motor, characterized in that the vehicle is provided with a motor controller according to any one of claims 10-14, the motor controller being electrically connected to the battery and the Motor between.