CN207368890U - Power Electronics Controllers and Electric Vehicles - Google Patents

Abstract

The utility model provides an electronic controller of electric power and electric automobile belongs to alternating current motor drive control technical field. The utility model discloses an electronic controller is used for providing AC input and control for AC motor, it includes: the first inversion power module assembly and the second inversion power module assembly are arranged in parallel; and a cooling interlayer sandwiched between the first inverter power module assembly and the second inverter power module assembly; a cooling flow channel shared by the first inversion power module assembly and the second inversion power module assembly is arranged in the cooling interlayer. The utility model discloses an electronic power controller's power output and current output ability are big, and the operational reliability is good to, have better heat dissipation efficiency, overall structure is compact.

Description

Power Electronics Controllers and Electric Vehicles

technical field

The utility model belongs to the technical field of AC motor drive control, and relates to a power electronic controller (Power Electronic Unit, PEU) for providing AC input for an AC motor and controlling the AC motor.

Background technique

High-power AC motors (such as induction motors or permanent magnet synchronous motors) are widely used in fields such as electric vehicles and used as drive motors. With the continuous popularization of electric vehicles, the market has a high demand for power density, cost, and safety of motor drive systems. Make higher demands.

In the motor drive system of the drive motor, the power electronic controller PEU is used to control and adjust the speed of the drive motor, and the PEU simultaneously inverts the DC high voltage input from the power battery into AC high voltage as the current input of the drive motor. The main functions of PEU include the following two points:

First, as an energy transmission device between the power battery and the drive motor, it has an inverter function, that is, a DC-AC conversion function. For example, it can convert the high-voltage direct current input by the power battery into a three-phase high-voltage alternating current and transmit it to the drive motor;

Second, as a control signal interface circuit and a drive motor control circuit, it receives signals sent by the vehicle controller VCU (Vehicle Control Unit) and signals such as motor temperature, speed, power, etc., makes corresponding feedback, and then feeds back the signals to the VCU And drive the motor, so as to play the role of driving the motor control.

At present, the power electronic controller adopts a single traditional three-phase full-bridge inverter power module. For example, for the drive motor of a large-power electric vehicle, it is easy to be limited by the maximum allowable current of the power device. For example, the current PEU in the market The peak power does not exceed 200KW, and the peak phase current does not exceed 500A. Therefore, the power output of the drive motor will be limited; moreover, the selection and cost of power devices are difficult to control for a single traditional three-phase full-bridge inverter power module. Excessive power will make it difficult to reduce the size and cost, and the cooling efficiency will be low.

Utility model content

The object of the present invention is to disclose a solution which eliminates or at least alleviates the above-mentioned drawbacks present in prior art solutions. The object of the present invention is also to realize one or more of the following advantages:

- Improve the power output and current output capability of PEU;

- Improve the reliability of PEU;

- Improve the heat dissipation efficiency of PEU;

-Improve the structure compactness of PEU.

The utility model provides the following technical solutions.

According to an aspect of the present invention, a power electronic controller is provided for providing an AC input to an AC motor and controlling the AC motor, which includes:

a first inverter power module assembly and a second inverter power module assembly arranged in parallel; and

a cooling interlayer sandwiched between the first inverter power module assembly and the second inverter power module assembly;

Wherein, the first inverter power module assembly and the second inverter power module assembly are connected in parallel to an external high-voltage DC power supply from the same high-voltage DC input terminal of the power electronic controller, and output AC output in parallel to its AC output;

A cooling channel shared by the first inverter power module assembly and the second inverter power module assembly is arranged in the cooling interlayer.

According to the power electronic controller according to an embodiment of the present invention, a power electronic controller electrically connected to the high-voltage DC input terminal for dividing the external high-voltage DC power supply into two circuits is arranged inside the power electronic controller. A DC bus bar assembly for DC input; the DC bus bar assembly has two parallel first DC bars and second DC bars respectively set corresponding to the two DC inputs, and the first inverter power module The assembly and the second inverter power module assembly are electrically connected to the first DC bar and the second DC bar respectively.

In the power electronic controller according to an embodiment of the present invention, the DC busbar assembly further includes a filter capacitor and a filter inductor.

In the power electronic controller according to an embodiment of the present invention, the first inverter power module assembly and the second inverter power module assembly each include:

capacitance;

switching power modules; and

Drive circuit;

Wherein, the heat dissipation components respectively provided on the switching power modules of the first inverter power module assembly and the second inverter power module assembly protrude at least partly into the cooling channel facing each other.

Optionally, the capacitors of the first inverter power module assembly and the second inverter power module assembly are attached to the upper surface and the lower surface of the cooling interlayer respectively, or are at least partially arranged on the cooling interlayer. In the cooling channel of the interlayer.

The power electronic controller according to an embodiment of the present invention, wherein the first inverter power module assembly includes a first AC output bus interface for forming the AC output end, and the second inverter power module The assembly includes a second AC output busbar interface for forming the AC output end.

According to the power electronic controller according to an embodiment of the utility model, wherein, corresponding to the second AC output bus bar interface/the first AC output bus bar interface, a transfer bus bar for forming the AC output end is provided, wherein the The first end of the transfer bus bar is connected to the second AC output bus bar interface/the first AC output bus bar interface.

According to the power electronic controller according to an embodiment of the utility model, the height of the transfer bus bar is equal to the height difference between the first AC output bus bar interface and the second AC output bus bar interface, and the transfer bus bar The second end of the row and the first AC output bus bar interface/the second AC output bus bar interface are arranged linearly at the same height.

According to an embodiment of the utility model, the power electronic controller, wherein, corresponding to the first AC output bus bar interface/second AC output bus bar interface, a first transfer output bus bar for forming the AC output end is provided, corresponding to the The second transfer bus bar is provided with a second transfer output bus bar for forming the AC output end, and the first transfer output bus bar and the second transfer output bus bar are arranged side by side in a straight line.

In the power electronic controller according to an embodiment of the present invention, the AC output terminal further includes filter inductors arranged on the first transfer output bus bar and the second transfer output bus bar.

In the power electronic controller according to an embodiment of the present invention, each of the first inverter power module assembly and the second inverter power module assembly further includes a current sensor.

According to the power electronic controller according to an embodiment of the present invention, the AC output end has three phase lines corresponding to the first inverter power module assembly, a first three-phase AC output and a first three-phase AC output corresponding to the second inverter power module The three phase wires of the second three-phase AC output of the assembly.

Optionally, the three phase wires corresponding to the first three-phase AC output and the three phase wires corresponding to the second three-phase AC output are electrically connected to the three-phase windings of the three-phase AC motor in a superimposed manner.

Optionally, when there is a phase difference between the first three-phase AC output and the second three-phase AC output, the three phase lines corresponding to the first three-phase AC output and the three phase lines corresponding to the second three-phase AC output They are respectively electrically connected to the six-phase windings of the six-phase AC motor.

The power electronic controller according to an embodiment of the present invention, wherein the power electronic controller is configured as a roughly box structure, and the first inverter power module assembly, the cooling interlayer and the second inverter power module assembly The components are respectively used to form the upper layer, the middle layer and the lower layer of the box structure.

The power electronic controller according to an embodiment of the present invention, wherein the cooling interlayer is configured as a part of the main box of the box structure, and the first inverter power module assembly and the second inverter power module assembly The module assemblies are symmetrically distributed on the upper and lower sides of the cooling interlayer.

The power electronic controller according to an embodiment of the present invention, wherein the power electronic controller further includes a low-voltage control circuit and a shielding plate, wherein the shielding plate is arranged between the low-voltage control circuit and the first inverter The power module assembly or the second inverter power module assembly is used to shield the electromagnetic interference of the high-voltage current signal.

According to yet another aspect of the present utility model, an electric vehicle is provided, which includes an AC motor for outputting power, and the power electronic controller mentioned above.

The power electronic controller PEU of the utility model has the first inverter power module assembly and the second inverter power module assembly arranged in parallel, and they share the cooling channel in the cooling interlayer to improve the power output and current output of the PEU At the same time, it can improve its working reliability, and has better heat dissipation efficiency and compact overall structure.

Description of drawings

The above and other objects and advantages of the present invention will be more fully understood from the following detailed description in conjunction with the accompanying drawings, wherein the same or similar elements are denoted by the same reference numerals.

FIG. 1 and FIG. 2 are schematic diagrams of the external three-dimensional structure of a power electronic device according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of a power electronic device according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a DC busbar assembly and an inverter power module assembly inside a power electronic device according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of the internal DC busbar assembly of the power electronic device according to an embodiment of the present invention.

Fig. 6 is a partial structural diagram of an inverter power module assembly of a power electronic device according to an embodiment of the present invention.

Fig. 7 is a schematic structural view of an AC output end of an inverter power module assembly of a power electronic device according to an embodiment of the present invention.

Fig. 8 is a schematic diagram of the internal structure of a power electronic device according to an embodiment of the present invention, in which a low-voltage control circuit and a shielding plate are shown.

Fig. 9 is a schematic diagram of a cooling channel inside a power electronic device according to an embodiment of the present invention.

Fig. 10 is a schematic diagram of a cooling principle of a power electronic device according to an embodiment of the present invention.

Detailed ways

The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the present invention to those skilled in the art.

In the following description, for clarity and conciseness of description, not all the various components shown in the figures are described in detail. The accompanying drawings show a number of components for those skilled in the art to fully realize the utility model, and for those skilled in the art, the operations of many components are familiar and obvious.

In the following description, for the convenience of explanation, the high direction of the power electronic controller is defined as the z direction, and the long direction of the power electronic controller is defined as the x direction, and the direction perpendicular to the z direction and the x direction, that is, the power electronics The width direction of the controller, defined as the y direction. It should be understood that the definitions of these directions are for description and clarification relative to each other and may change accordingly according to changes in the orientation of the power electronics controller.

In the following embodiments, unless otherwise specified, the orientation terms of "up" and "down" are defined based on the z direction; and it should be understood that these directional terms are relative concepts, and they are used for With respect to the description and clarification, it may vary accordingly according to the orientation in which the stabilizing device is installed.

The power electronic controller PEU10 according to an embodiment of the present invention will be illustrated in detail below with reference to FIGS. 1 to 10 .

PEU10 is exemplarily applied to AC motors driving electric vehicles (including pure electric vehicles and hybrid vehicles), which can provide high-power three-phase high-voltage AC outputs (U1, V1 and W1, U2, V2 and W2) for AC motors, And provide larger peak power and peak current output.

As shown in Figures 1 and 2, the PEU 10 as a whole is configured as a roughly square box structure 11, and has a high-voltage DC input terminal 101 outside it, which is used to connect to a high-voltage DC power supply, for example, two high-voltage DC input terminals 101 are respectively connected to the positive and negative output terminals of the power battery pack; and, the PEU10 has an inlet and outlet 301 corresponding to the internal cooling flow channel 310, and liquid for cooling (such as water) can flow in and out from the inlet and outlet 301 cyclically. The specific shape design of the external structure of the PEU 10 is not limiting, and its shape can be designed according to factors such as its installation position on an electric vehicle. In the following description, it will be understood that the overall PEU 10 with the box structure 11 in the embodiment of the present invention has the advantage of a compact structure.

The PEU10 is mainly provided with a first inverter power module assembly 200 and a second inverter power module assembly 400, and the two first inverter power module assemblies 200 and the second inverter power module assembly 400 are mainly used for Realize the conversion from DC to AC; from the point of view of the electrical connection structure, their input terminals are simultaneously connected to the external high-voltage DC power supply in parallel, and the first inverter power module assembly 200 and the second inverter power module assembly 400 Parallel output three-phase AC U1, V1, and W1, and three-phase AC U2, V2, and W2; From a structural point of view (as shown in Figure 3), the first inverter power module assembly 200 and the second inverter power module assembly 400 can be arranged in parallel, and the cooling interlayer 300 is arranged in the middle, so that the first inverter power module assembly 200, the cooling interlayer 300 and the second inverter power module assembly 400 are respectively used to form the upper layer of the box structure 11, middle and lower floors. The middle layer corresponding to the cooling interlayer 300 can be, for example, a part of the main box body of the box structure 11 formed of an aluminum alloy. Components that have a certain strength and thermal conductivity. Correspondingly, the inside of the main box part sandwiched between the first inverter power module assembly 200 and the second inverter power module assembly 400 can form a cooling channel 310 through which the cooling liquid can circulate, thereby forming a first The cooling interlayer 300 shared by the inverter power module assembly 200 and the second inverter power module assembly 400 can simultaneously cool the first inverter power module assembly 200 and the second inverter power module assembly 400, cooling The efficiency is high, and a more compact arrangement can be realized in the cooling structure.

In one embodiment, both the first inverter power module assembly 200 and the second inverter power module assembly 400 have roughly similar structures as shown in Figure 4 and Figure 6, and they are symmetrically distributed in the cooling interlayer up and down. The upper and lower sides of 300, and respectively have heat dissipation components 221 and 421 for improving heat dissipation efficiency. The heat dissipation components 221 and 421 can be cylinders that are easy to conduct heat, as shown in Figure 3, Figure 7 and Figure 9, the first inverter The heat dissipation component 221 on the power module assembly 200 and the heat dissipation component 421 on the second inverter power module assembly 400 are arranged facing each other, and at least partly extend into the cooling flow channel 310 of the cooling interlayer 300 shared by them, thereby improving the resistance to inversion. The heat dissipation efficiency of the variable power module assembly.

The cooling principle of PEU10 is shown in Figure 10. The core component of the first inverter power module assembly 200 that needs to be cooled is the high-power switching power module 220, and its main heating element is the power switching element of the switching power module 220 (such as IGBT ) 222 ; similarly, the part of the second inverter power module assembly 400 that needs cooling particularly is the high-power switching power module 420 , and its main heating element is the power switching element (such as IGBT) 422 of the switching power module 420 . The liquid in the cooling channel 310 circulates in the direction shown in Figure 10, thereby taking away the heat dissipated by the power switching elements 222 and 422 at the same time. Therefore, one cooling interlayer 300 can provide heat dissipation for two inverter power module assemblies at the same time , thereby improving the cooling efficiency.

As shown in Fig. 3 and Fig. 4, there is also a DC busbar assembly 100 electrically connected to the high-voltage DC input terminal 101 inside the PEU10, and the DC busbar assembly 100 is used to connect an external high-voltage DC power supply (such as the high voltage DC output) are evenly divided into two DC inputs, so that the first inverter power module assembly 200 and the second inverter power module assembly 400 have the same DC input at the same time. The DC bus bar assembly 100 has two parallel first DC bars 120 and second DC bars 140 respectively provided corresponding to the two DC inputs, and each DC bar 120 or 140 has two terminals, which are respectively electrically connected to two The DC input terminals 101 are respectively electrically connected to the positive and negative DC input terminals; the two first DC bars 120 and the second DC bars 140 are arranged in parallel to split the DC input of the DC busbar assembly 100 . The first inverter power module assembly 200 and the second inverter power module assembly 400 are electrically connected to the first DC bar 120 and the second DC bar 140 respectively, so that the first inverter power module assembly 200 and the second The inverter power module assembly 400 is respectively connected to an independent DC input power supply. The first DC bar 120 and/or the second DC bar 140 can specifically be a DC copper bar, the first DC bar 120 and the second DC bar 140 have the same structure and use the same material, for example, the first DC bar 120 and the second DC bar 140 have the same cross-sectional area.

In an embodiment, as shown in FIG. 5 , the DC busbar assembly 100 further includes a filter capacitor 110 and a filter inductor 130 . The filter capacitor 110 can be, for example, an X capacitor and a Y capacitor, which can filter the high-voltage DC input to ensure stable and reliable input current; specifically, the filter inductor 130 can be an inductance device such as a ferrite inductor, which can transfer the power from the power battery pack The DC high-voltage clutter of the high-voltage DC input is filtered to ensure the EMC performance of the PEU10.

As shown in Figures 3, 4 and 7, the first inverter power module assembly 200 mainly includes a capacitor 210, a switching power module 220 and a drive circuit 230; the second inverter power module assembly 400 also has a similar structure, its It mainly includes a capacitor 410 , a switching power module 420 and a driving circuit 430 . Wherein, the capacitors 210 and 410 are optionally film capacitors, which can be respectively connected across the two ends of each DC input to form a DC-link capacitor, therefore, they are also called DC link capacitors.

Since the capacitors 210 and 410 may generate ripple current and generate heat when they are in operation, therefore, in one embodiment, the capacitors 210 and 410 may be attached to the upper surface and the lower surface of the cooling interlayer 300 respectively, or At least part of the capacitors 210 and 410 are directly disposed in the cooling channel 310 , so that the cooling interlayer 300 is used to dissipate heat and reduce the temperature of the capacitors 210 and 410 .

The switching power modules 220 and 420 will generate a large amount of heat during the inverting process, and the cooling interlayer 300 will be liquid-cooled. Switching power modules 220 and 420 can simultaneously work and output three-phase AC power, thus improving the power output and current output capabilities of PEU 10 and easily meeting the high power output requirements of AC motors in electric vehicles. In one embodiment, the rated power of the PEU 10 can reach 60KW, the peak power can reach 240KW, and the peak current can reach 930A. Moreover, if one of the switching power modules 220 and 420 breaks down or fails, the other can continue to work and provide a certain power AC output. Therefore, the AC motor can continue to drive the electric vehicle under relatively low power conditions, and the reliability is improved. Improvement is beneficial to prevent the vehicle from breaking down and other situations.

The switching power modules 220 and 420 may include, for example, three inverter sub-modules to invert to form a 3-phase AC output. It should be noted that if the switching power modules 220 and 420 need to output AC outputs other than 3 phases, the number of output phases can be adjusted by setting the number of inverter sub-modules. The power switching elements 222 and 422 used in each inverter sub-module may be but not limited to IGBT (Insulated Gate Bipolar Transistor).

1 and 3, the PEU10 also has an AC output terminal 24, which has two sets of AC output busbar interfaces corresponding to the two inverter power module assemblies, that is, the first AC output busbar interface 240 and the second AC output busbar interface. The AC output bus interface 440, as shown in FIG. 7, the first AC output bus interface 240 is set corresponding to the switching power module 220, the second AC output bus interface 440 is set corresponding to the switching power module 420, and the first AC output bus interface The bus bar interface 240 corresponds to the three-phase AC output end of the first inverter power module assembly 200, and the three interfaces output U1 phase, V1 phase and W1 phase respectively, and the second AC output bus bar interface 440 corresponds to the second inverter power module assembly 200. The three-phase AC output terminal of the power module assembly 400 and the three interfaces respectively output U2 phase, V2 phase and W2 phase.

In one embodiment, as shown in FIG. 4 and FIG. 7 , since the first inverter power module assembly 200 and the second inverter power module assembly 400 are arranged in parallel up and down in the z direction, their corresponding There is a height difference between the first AC output busbar interface 240 and the second AC output busbar interface 440 in the z direction. In order to overcome this height difference, as shown in Figure 4, Figure 7 and Figure 8, corresponding to the second AC output bus bar interface 440 is provided with a transfer bus bar 442 for forming the AC output terminal 24, wherein the transfer bus bar 442 The first end is connected to the second AC output bus bar interface 440; the height of the transfer bus bar 442 is substantially equal to the height difference between the first AC output bus bar interface 240 and the second AC output bus bar interface 440, thus, the transfer bus bar The second end of 442 and the first AC output busbar interface 240 are linearly arranged at the same height. In this way, the transfer busbar 442 transfers the AC output of the second inverter power module assembly 400 to the same height corresponding to the AC output of the first inverter power module assembly 200, so as to facilitate the transfer of two-way three-phase AC outputs from the PEU10 elicited in. It should be understood that, in yet another alternative embodiment, a transfer bus bar may also be provided corresponding to the first AC output bus bar interface 240, and the first end of the transfer bus bar is connected to the first AC output bus bar interface 240, which The second end and the second AC output busbar interface 440 are arranged at the same height and in a straight line; in this way, the transfer busbar transfers the AC output of the first inverter power module assembly 200 to the corresponding second inverter The height of the AC output of the power module assembly 400 is the same. The transfer bus bar 442 may specifically be a transfer copper bar.

As shown in Figures 7 and 8, the corresponding AC output bus bar interface 240 is provided with a first transfer output bus bar 250 for forming the AC output terminal 24, and the second end of the transfer bus bar 442 is provided with a first transfer bus bar 250 for forming an AC output port. The second transfer output bus bar 450 at the terminal 24, the first transfer output bus bar 250 and the second transfer output bus bar 450 are arranged side by side in a straight line (for example, in the y direction), so as to facilitate the connection to the input end of the AC motor. It should be understood that, in the above embodiments, the AC output end 24 of the PEU 10 can be understood as an AC output end assembly, which mainly includes the first AC output bus bar interface 240, the second AC output bus bar interface 440, the transfer bus bar 442. Components such as the first transfer output bus bar 250 and the second transfer output bus bar 450. In yet another embodiment, the AC output terminal 24 is provided with a filter inductor 245, and the filter inductor 245 can be integrally arranged on the first transfer output bus bar 250 and the second transfer output bus bar 450, and the filter inductor can be integrated Filter the first transfer output bus bar 250 and the second transfer output bus bar 450 arranged side by side in a straight line; the filter inductor 245 can also be 6 filter inductors arranged in a straight line side by side, for the first transfer output bus bar 250 and The six output ends of the second switching output bus bar 450 are respectively filtered. The filter inductor 245 ensures the stability of the AC output signal. Optionally, the material selected for the filter inductor 245 can be, but not limited to, ferrite or amorphous material; the filter inductor 245 can be integrated into the main box through plastic parts, or integrated on the cover of the main box. 3 and 7, the drive circuits 230 and 430 can be specifically arranged in the form of circuit boards, which provide switch drive signals for the switch power modules 220 and 420 respectively, thereby controlling the conduction of each power switch element 222 and 422 and shutdown. In one embodiment, as shown in FIG. 6 , the first inverter power module assembly 200 further includes a current sensor 260. Similarly, the second inverter power module assembly 400 is also provided with a current sensor (not shown in the figure). Shows).

In one embodiment, as shown in FIG. 3 and FIG. 8 , the power electronic controller 10 further includes a low-voltage control circuit 500. The low-voltage control circuit 500 can be used to control the drive circuits 230 and 430, for example, to realize the function of controlling the AC motor. . The low-voltage control circuit 500 operates with low voltage and low current, so it is easy to be controlled by the DC busbar assembly 100, capacitors 210 and 410, switching power modules 220 and 420, the first AC output busbar interface 240 and the second AC busbar assembly inside the PEU10. In order to avoid the electromagnetic interference of high-current and high-voltage signals such as the AC output busbar interface 440, a shielding plate 600 is also provided corresponding to the low-voltage control circuit 500, and the shielding plate 600 can be arranged between the low-voltage control circuit 500 and the first inverter. Between the power module assemblies 200, a low-voltage control circuit 500 and the second inverter power module assembly 400 may also be arranged, which has the function of isolating electromagnetic interference of high-voltage current signals. Specifically, the shielding plate 600 is designed as a metal sheet metal part, and its material is galvanized carbon steel; the surrounding area of the sheet metal part contains ribs, so that the shielding plate structurally wraps the low-voltage control circuit 500 to realize the protection of the low-voltage control circuit. 500 signal isolation. Specifically, the low-voltage control circuit 500 can be configured as a circuit board.

When the PEU10 in the above embodiment is working, the first transfer output bus bar 250 can output three-phase AC output (U1, V1, W1), and the second transfer output bus bar 450 can output another three-phase AC output (U2, V2, W2), that is, the AC output terminal 24 has six phase lines corresponding to two three-phase AC outputs. If the AC motor is a three-phase AC motor, the three-phase AC output of the first transfer output bus bar 250 and the three-phase AC output of the second transfer output bus bar 450 are electrically in the same phase, and they can be the same phase as the three-phase motor at the same time. Provide superimposed three-phase AC output, for example, U1 and U2, V1 and V2, W1 and W2 are respectively electrically connected to the three-phase windings of the three-phase AC motor, so that they are correspondingly superimposed and electrically connected to the three-phase of the three-phase AC motor on the winding. If the AC motor is a six-phase AC motor, the three-phase AC output of the first transfer output bus bar 250 and the three-phase AC output of the second transfer output bus bar 450 have a phase difference of, for example, 60° electrically. The combination of the three-phase AC output connected to the output bus bar 250 and the three-phase AC output of the second transfer output bus bar 450 provides six-phase AC output for the six-phase AC motor, for example, U1, U2, V1, V2, W1 and W2 respectively It is electrically connected to the six-phase winding of the six-phase AC motor.

When the PEU 10 of the above embodiments of the utility model is installed and applied to an electric vehicle to drive an AC motor, the electric vehicle of the embodiment of the present utility model is formed. The electric vehicle in the embodiment of the utility model can use a three-phase AC motor or a six-phase AC motor. When using a three-phase AC motor, U1 and U2, V1 and V2, W1 and W2 are respectively connected to the three-phase windings of the three-phase AC motor. When using a six-phase AC motor, the three-phase AC output of the first transfer output bus bar 250 and the three-phase AC output of the second transfer output bus bar 450 electrically have a phase difference of, for example, 60°, U1, U2 , V1, V2, W1 and W2 are respectively connected to the six-phase windings of the six-phase AC motor.

It should be noted that the PEU 10 of the embodiment of the present utility model is not limited to be used in electric vehicles. According to the above disclosure, it will be understood that the PEU 10 of the embodiment of the present utility model can also be applied to vehicles with requirements similar to the use of AC motors of electric vehicles. machine or equipment.

It will be understood that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may be present.

The above examples mainly illustrate the power electronic controller and the electric vehicle of the present utility model. Although only some embodiments of the utility model have been described, those skilled in the art should understand that the utility model can be implemented in many other forms without departing from the gist and scope thereof. The examples and implementations shown are therefore to be regarded as illustrative and not restrictive, and the present invention may cover various modification and replacement.

Claims (18)

1. A power electronic controller (10), used for providing an AC input to an AC motor and controlling the AC motor, characterized in that it comprises: a first inverter power module assembly (200) and a second inverter power module assembly (400) arranged in parallel; and A cooling interlayer (300) sandwiched between the first inverter power module assembly and the second inverter power module assembly; Wherein, the first inverter power module assembly (200) and the second inverter power module assembly (400) are connected in parallel from the same high voltage DC input terminal (101) of the power electronic controller (10) An external high-voltage DC power supply, and outputs an AC output in parallel to its AC output terminal (24); A cooling channel (310) shared by the first inverter power module assembly (200) and the second inverter power module assembly (400) is arranged in the cooling interlayer (300). 2. The power electronic controller (10) according to claim 1, characterized in that, inside the power electronic controller (10), there is a device for electrically connecting with the high voltage DC input terminal (101). A DC busbar assembly (100) that divides the external high-voltage DC power supply into two DC inputs; the DC busbar assembly (100) has two parallel first A DC bar (120) and a second DC bar (140), the first inverter power module assembly (200) and the second inverter power module assembly (400) are respectively electrically connected to the first DC bar flow row (120) and second flow row (140). 3. The power electronic controller according to claim 2, characterized in that, the DC busbar assembly (100) further comprises a filter capacitor (110) and a filter inductor (130). 4. The power electronic controller (10) according to claim 1, characterized in that, each of the first inverter power module assembly (200) and the second inverter power module assembly (400) comprises: capacitance(210, 410); switching power modules (220, 420); and drive circuit (230, 430); Wherein, the cooling components (221, 421) respectively provided on the switching power modules (220, 420) of the first inverter power module assembly (200) and the second inverter power module assembly (400) face each other protruding at least partially into the cooling channel (310). 5. The power electronic controller (10) according to claim 4, characterized in that the capacitors (210) of the first inverter power module assembly (200) and the second inverter power module assembly (400) , 410) respectively attached to the upper surface and the lower surface of the cooling interlayer (300), or at least partly arranged in the cooling channel (310) of the cooling interlayer (300). 6. The power electronic controller (10) according to claim 1 or 4, characterized in that, the first inverter power module assembly (200) includes a second An AC output bus bar interface (240), the second inverter power module assembly (400) includes a second AC output bus bar interface (440) for forming the AC output end (24). 7. The power electronic controller (10) according to claim 6, characterized in that, corresponding to the second AC output busbar interface (440)/first AC output busbar interface (240), there is a The transfer bus bar (442) of the AC output terminal (24), wherein the first end of the transfer bus bar (442) is connected to the second AC output bus bar interface (440)/first AC output bus bar row interface (240) connection. 8. The power electronic controller (10) according to claim 7, characterized in that, the height of the transfer busbar (442) is equal to the first AC output busbar interface (240) and the second AC output busbar interface (240). The height difference of the bus bar interface (440), the second end of the transfer bus bar (442) and the first AC output bus bar interface (240)/the second AC output bus bar interface (440) Arranged in a straight line at the same height. 9. The power electronic controller (10) according to claim 7 or 8, characterized in that, corresponding to the first AC output busbar interface (240)/the second AC output busbar interface (440), there is a The first transfer output bus bar (250) of the AC output terminal (24), and the second transfer bus bar (442) corresponding to the second end of the transfer bus bar (442) is provided with a second transfer bus bar for forming the AC output terminal (24). The output bus bar (450), the first transfer output bus bar (250) and the second transfer output bus bar (450) are linearly arranged side by side. 10. The power electronic controller (10) according to claim 9, characterized in that, the AC output end (24) further includes Filter inductor (245) on output busbar (450). 11. The power electronic controller (10) according to claim 4, characterized in that, each of the first inverter power module assembly (200) and the second inverter power module assembly (400) further includes a current sensor (260). 12. The power electronic controller (10) according to claim 1, characterized in that, the AC output terminal (24) has a first three-phase AC output corresponding to the first inverter power module assembly (200) and the three phase lines corresponding to the second three-phase AC output of the second inverter power module assembly (400). 13. The power electronic controller (10) according to claim 12, characterized in that, the three phase wires corresponding to the first three-phase AC output and the three phase wires corresponding to the second three-phase AC output correspond to the superimposed ground voltage Connected to the three-phase winding of the three-phase AC motor. 14. The power electronic controller (10) according to claim 12, characterized in that, the three phase wires corresponding to the first three-phase AC output and the three phase wires corresponding to the second three-phase AC output are respectively electrically connected to On the six-phase winding of a six-phase AC motor. 15. The power electronic controller (10) according to claim 1, characterized in that, the power electronic controller (10) is configured as a box structure (11), and the first inverter power module assembly (200), the cooling interlayer (300) and the second inverter power module assembly (400) are respectively used to form the upper layer, the middle layer and the lower layer of the box structure (11). 16. The power electronic controller (10) according to claim 15, characterized in that, the cooling interlayer (300) is configured as a part of the main box of the box structure (11), and the first The inverter power module assembly (200) and the second inverter power module assembly (400) are symmetrically distributed on the upper and lower sides of the cooling interlayer (300). 17. The power electronic controller (10) according to claim 1, characterized in that, the power electronic controller (10) further comprises a low-voltage control circuit (500) and a shielding plate (600), wherein the shielding The board (600) is arranged between the low-voltage control circuit (500) and the first inverter power module assembly (200) or the second inverter power module assembly (400) to shield the electromagnetic of the high-voltage current signal. interference. 18. An electric vehicle, comprising an AC motor for outputting power, characterized in that it further comprises a power electronic controller (10) according to any one of claims 1 to 17.