CN108988655B - Electric power electronic controller and electric automobile - Google Patents

Abstract

The invention provides a power electronic controller and an electric vehicle, belonging to the technical field of AC motor drive control. The power electronic controller of the present invention is used to provide an AC input for an AC motor and to control the AC motor, which comprises: a first inverter power module assembly and a second inverter power module assembly arranged in parallel; A cooling interlayer between the inverter power module assembly and the second inverter power module assembly; a cooling channel shared by the first inverter power module assembly and the second inverter power module assembly is arranged in the cooling interlayer . The power electronic controller of the invention has large power output and current output capability, good working reliability, better heat dissipation efficiency and compact overall structure.

Description

Power Electronic Controllers and Electric Vehicles

technical field

The invention belongs to the technical field of AC motor drive control, and relates to a power electronic unit (Power Electronic Unit, PEU) for providing AC input for the 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 are used as drive motors. put forward higher requirements.

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 to the 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 DC power input from the power battery into three-phase high-voltage AC power and transmit it to the drive. motor;

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

At present, the power electronic controller adopts a single traditional three-phase full-bridge inverter power module. For example, the drive motor of electric vehicle with high power is easily limited by the maximum allowable current of the power device. For example, the PEU in the current 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; and, for a single traditional three-phase full-bridge inverter power module, the selection and cost of power devices are not easy to control. Excessive power will make it difficult to reduce the volume and cost, and the cooling efficiency will be lower.

SUMMARY OF THE INVENTION

The aim of the present invention is to disclose a solution which eliminates or at least alleviates the above-mentioned drawbacks of the prior art solutions. It is also an object of the present invention to achieve 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 compactness of the PEU.

The present invention provides the following technical solutions.

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

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

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

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 to its AC output;

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

According to an embodiment of the power electronic controller of the present invention, a power electronic controller is provided inside the power electronic controller and is electrically connected to the high-voltage DC input terminal for dividing the external high-voltage DC power supply into two DC channels. The input DC busbar assembly; the DC busbar assembly has two parallel first DC rows and second DC rows respectively set corresponding to the two DC inputs, and the first inverter power module has a total of The inverter power modules and the second inverter power modules are respectively electrically connected to the first DC row and the second DC row.

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

According to the power electronic controller of 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 dissipating components respectively provided on the switching power modules of the first inverter power module assembly and the second inverter power module assembly extend into the cooling channel at least partially facing each other.

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

According to the power electronic controller of an embodiment of the present invention, 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 assembly includes a first AC output bus interface for forming the AC output end. It includes a second AC output busbar interface for forming the AC output end.

According to the power electronic controller of an embodiment of the present invention, a switching busbar for forming the AC output end is provided corresponding to the second AC output busbar interface/first AC output busbar interface, wherein the The first end of the switching busbar is connected to the second AC output busbar interface/first AC output busbar interface.

According to the power electronic controller of an embodiment of the present invention, the height of the switching busbar is equal to the height difference between the first AC output busbar interface and the second AC output busbar interface, and the switching busbar The second end and the first AC output busbar interface/the second AC output busbar interface are arranged in a straight line at the same height.

According to the power electronic controller of an embodiment of the present invention, a first switching output bus for forming the AC output end is provided corresponding to the first AC output bus interface/second AC output bus interface, corresponding to the The second end of the switching busbar is provided with a second switching output busbar for forming the AC output end, and the first switching output busbar and the second switching output busbar are arranged linearly side by side.

According to the power electronic controller of an embodiment of the present invention, the AC output terminal further includes a filter inductor disposed on the first switching output busbar and the second switching output busbar.

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

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 superposed and electrically connected to the three-phase windings of the three-phase AC motor.

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

A power electronic controller according to an embodiment of the present invention, wherein the power electronic controller is configured as a substantially box structure, the first inverter power module assembly, the cooling interlayer, and the second inverter power module assembly They 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 a main case of the case structure, the first inverter power module assembly and the second inverter power module The 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 disposed between the low-voltage control circuit and the first inverter power The 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 invention, an electric vehicle is provided, which includes an AC motor for outputting power, and the above-mentioned power electronic controller.

The power electronic controller PEU of the present invention has a first inverter power module assembly and a second inverter power module assembly arranged in parallel, and they share the cooling flow channel in the cooling interlayer, thereby improving the power output and current output capability of the PEU At the same time, its working reliability can be improved, and it 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 apparent from the following detailed description taken in conjunction with the accompanying drawings, wherein the same or similar elements are designated by the same reference numerals.

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

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

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

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

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

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

8 is a schematic diagram of the internal structure of a power electronic device according to an embodiment of the present invention, wherein 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, the present 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 invention to those skilled in the art.

In the following description, for the sake of clarity and conciseness, not all of the various components shown in the figures are described in detail. The drawings illustrate various components that are well-equipped to implement the invention to those skilled in the art, the operation of which will be familiar and obvious to those skilled in the art.

In the following description, for the convenience of description, the height 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 is the power electronic controller. The width direction of the controller, defined as the y direction. It is to be understood that the definitions of these directions are for description and clarification relative to, which may vary accordingly depending on the orientation of the power electronic controller.

In the following embodiments, the directional terms "upper" and "lower" are defined based on the z-direction unless otherwise specified; and it should be understood that these directional terms are relative concepts, which are used for With respect to the description and clarification, it can be changed accordingly according to the change of the orientation in which the stabilization device is installed.

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

PEU10 is exemplarily applied to AC motors for driving electric vehicles (including pure electric vehicles and hybrid electric 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 FIG. 1 and FIG. 2 , the PEU 10 as a whole is set as a substantially square box structure 11 , and has a high-voltage DC input terminal 101 on the outside thereof, 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 ends of the power battery pack; and the PEU 10 has an inlet and outlet 301 on the outside corresponding to the cooling flow channel 310 inside, and the liquid (eg water) used for cooling can flow in and out through the inlet and outlet 301 cyclically. The specific shape design of the external structure of the PEU 10 is not limited, and its shape may be designed according to factors such as the location where it is installed on the electric vehicle. In the following description, it will be understood that the PEU 10 having the box structure 11 of the embodiment of the present invention has the advantage of being compact as a whole.

The PEU10 is mainly provided with an inverter power module assembly 200 and an inverter power module assembly 400. The two inverter power module assemblies 200 and 400 are mainly used to realize the conversion from DC to AC; from the point of view of the electrical connection structure , their input ends are connected to the external high-voltage DC power supply in parallel at the same time, and the inverter power module assemblies 200 and 400 output three-phase AC U1, V1 and W1, and three-phase AC U2, V2 and W2 in parallel; structurally See (as shown in FIG. 3), the inverter power module assemblies 200 and 400 can be arranged in parallel, and the cooling interlayer 300 is arranged in the middle, so that the inverter power module assembly 200, the cooling interlayer 300 and the 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 . The intermediate layer corresponding to the cooling interlayer 300 may be, for example, a part of the main box of the box structure 11 formed of aluminum alloy. components, which have a certain strength and thermal conductivity. Correspondingly, a cooling channel 310 through which the cooling liquid can circulate can be formed inside the main box portion sandwiched between the inverter power module assemblies 200 and 400 , thereby forming a cooling common for the inverter power module assemblies 200 and 400 . The interlayer 300 can cool the inverter power module assemblies 200 and 400 at the same time, has high cooling efficiency, and can be arranged more compactly in the cooling structure.

In one embodiment, the inverter power module assemblies 200 and 400 have substantially similar structures as shown in FIG. 4 and FIG. 6 , they are symmetrically distributed on the upper and lower sides of the cooling interlayer 300 In order to improve the heat dissipation efficiency of the heat dissipation components 221 and 421, the heat dissipation components 221 and 421 may be cylinders that are easy to conduct heat. As shown in FIG. 3, FIG. 7 and FIG. The heat dissipation components 421 on the inverter power module assembly 400 are disposed opposite to each other, and at least partially extend into the cooling channels 310 of the cooling interlayer 300 shared by them, thereby improving the heat dissipation efficiency of the inverter power module assembly.

The cooling principle of the PEU 10 is shown in FIG. 10 . The core component of the 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 (eg IGBT) 222 of the switching power module 220 . Similarly, the component of the inverter power module assembly 400 that needs cooling is the high-power switching power module 420 , whose main heating element is the power switching element (eg, IGBT) 422 of the switching power module 420 . The liquid in the cooling channel 310 circulates in the direction shown in FIG. 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 the two inverter power module assemblies at the same time. , thereby improving the heat dissipation efficiency.

As shown in FIG. 3 and FIG. 4 , the inside of the PEU 10 is further provided with a DC busbar assembly 100 that is electrically connected to the high-voltage DC input terminal 101 . The DC busbar assembly 100 is used to connect an external high-voltage DC power supply (such as the The high-voltage DC output) is divided into two DC inputs, so that the inverter power module assembly 200 and the 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 arranged corresponding to the two DC inputs, and each DC bar 120 or 140 has two terminals, which are respectively electrically connected to the two DC bars. 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 realize the shunting of the DC input of the DC busbar assembly 100 . The inverter power module assembly 200 and the inverter power module 400 are electrically connected to the first DC row 120 and the second DC row 140 respectively, so that the inverter power module assembly 200 and the inverter power module 400 are respectively connected to independent One DC input power supply. The first DC row 120 and/or the second DC row 140 may specifically be DC copper bars, and the first DC row 120 and the second DC row 140 have the same structural arrangement and use the same material, for example, the first DC row 120 and the second DC row 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 . For example, the filter capacitor 110 can be an X capacitor and a Y capacitor, which can filter the high-voltage DC input to ensure stable and reliable input current; The DC high-voltage electrical clutter of the high-voltage DC input is filtered to ensure the EMC performance of the PEU10.

As shown in FIGS. 3 , 4 and 7 , the inverter power module assembly 200 mainly includes a capacitor 210 , a switching power module 220 and a drive circuit 230 ; the inverter power module assembly 400 also has a similar structure, and mainly includes a capacitor 410 , switch power module 420 and drive 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, also called DC link capacitors.

Since the capacitors 210 and 410 may generate ripple current on them to generate heat during operation, in one embodiment, the capacitors 210 and 410 may be attached to the upper and lower surfaces of the cooling interlayer 300, respectively, or At least part of the capacitors 210 and 410 is 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 inverter work process and will be liquid-cooled by the cooling interlayer 300 . The switching power modules 220 and 420 can work simultaneously to output three-phase alternating current, therefore, the power output and current output capabilities of the PEU 10 are improved, and it is easy to meet the high-power output requirements of the AC motor in the electric vehicle. 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. And, if one of the switching power modules 220 and 420 fails 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. It is helpful 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 three 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 are not limited to, IGBTs (Insulated Gate Bipolar Transistors).

Continuing as shown in FIGS. 1 and 3 , the PEU 10 also has an AC output end 24 , which has two sets of AC output busbar interfaces corresponding to the two inverter power module assemblies, namely the first AC output busbar interface 240 and the second AC output busbar interface 240 . 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 440 is set corresponding to the switching power module 420. The busbar interface 240 corresponds to the three-phase AC output terminal of the inverter power module assembly 200, and the three interfaces output U1 phase, V1 phase and W1 phase respectively, and the second AC output busbar interface 440 corresponds to the inverter power module assembly. The three-phase AC output terminal of 400 and the three interfaces output U2 phase, V2 phase and W2 phase respectively.

In an embodiment, as shown in FIG. 4 and FIG. 7 , since the inverter power module assembly 200 and the inverter power module assembly 400 are arranged in parallel up and down in the z direction, their corresponding first AC output confluence There is a height difference between the bar interface 240 and the second AC output bus bar interface 440 in the z direction. In order to overcome the height difference, as shown in FIG. 4 , FIG. 7 and FIG. 8 , corresponding to the second AC output bus bar interface 440 is provided with a switching bus bar 442 for forming the AC output end 24 , wherein the switching bus bar 442 is 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, so that the transfer bus bar The second end of 442 and the first AC output bus interface 240 are arranged in a straight line at the same height. In this way, the transfer bus bar 442 transfers the AC output of the inverter power module assembly 400 to the same height corresponding to the AC output of the inverter power module assembly 200 , so as to facilitate the extraction of two three-phase AC outputs from the PEU 10 . It should be understood that, in 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 bus bar interface 440 are at the same height and arranged in a straight line; in this way, the transfer bus bar transfers the AC output of the inverter power module assembly 200 to the corresponding inverter power module assembly 400 AC output at the same height. Specifically, the transfer bus bar 442 may be a transfer copper bar.

As shown in FIG. 7 and FIG. 8 , corresponding to the AC output bus bar interface 240 is provided with a first switching output bus bar 250 for constituting the AC output end 24 , and corresponding to the second end of the switching bus bar 442 is provided with a first switching output bus bar 250 for constituting the AC output terminal 24 . The second switching output busbar 450 of the terminal 24, the first switching output busbar 250 and the second switching output busbar 450 are arranged side by side in a straight line (eg in the y direction), which is convenient for connecting the input terminal of the AC motor. It should be understood that, in the above embodiment, the AC output terminal 24 of the PEU 10 can be understood as an AC output terminal assembly, which mainly includes the first AC output busbar interface 240 , the second AC output busbar interface 440 , and the transfer busbar 442. Components such as the first switching output bus bar 250 and the second switching output bus bar 450. In yet another embodiment, the AC output end 24 is provided with a filter inductor 245, the filter inductor 245 can be integrally arranged on the first switching output busbar 250 and the second switching output busbar 450, and the filter inductor can be integrally Filter the first switching output busbar 250 and the second switching output busbar 450 arranged in a straight line; the filter inductor 245 can also be 6 filter inductors arranged side by side in a straight line, and filter the first switching output busbar 250 and the second switching output busbar 450; The six output terminals 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 may be, but not limited to, ferrite or amorphous material; the filter inductor 245 may be integrated into the main box through plastic parts or the like, or integrated on the main box cover. Continuing as shown in FIG. 3 and FIG. 7 , the driving circuits 230 and 430 may be provided in the form of circuit boards, and they provide switching driving signals for the switching power modules 220 and 420 respectively, thereby controlling the conduction of each power switching element 222 and 422 and shutdown. In one embodiment, as shown in FIG. 6 , the inverter power module assembly 200 further includes a current sensor 260 , and similarly, the inverter power module assembly 400 is also correspondingly provided with a current sensor (not shown in the figure).

In one embodiment, as shown in FIG. 3 and FIG. 8 , the power electronic controller 10 further includes a low-voltage control circuit 500, and the low-voltage control circuit 500 can be used to control the driving circuits 230 and 430, for example, to realize the function of controlling the AC motor. . The low-voltage control circuit 500 operates at a low voltage and a small current, so it is easily affected by the DC busbar assembly 100 , the capacitors 210 and 410 , the switching power modules 220 and 420 , the first AC output busbar interface 240 and the second AC busbar interface 240 inside the PEU 10 . In order to avoid the electromagnetic interference of the high current and high voltage signals of the AC output bus bar interface 440, the corresponding low voltage control circuit 500 is also provided with a shielding plate 600. The shielding plate 600 can be arranged on the low voltage control circuit 500 and the inverter power module. Between the assemblies 200, the low-voltage control circuit 500 and the inverter power module assembly 400 can also be set, which has the function of isolating the electromagnetic interference of the high-voltage current signal. 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 low-voltage control circuit. 500 signal isolation. The low-voltage control circuit 500 may specifically be configured as a circuit board.

When the PEU 10 of the above embodiment is in operation, the first switching output busbar 250 can output three-phase AC outputs (U1, V1, W1), and the second switching output busbar 450 can output another three-phase AC output (U2, V1, W1). V2, W2), that is, the AC output terminal 24 has six phase wires 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 switching output busbar 250 and the three-phase AC output of the second switching output busbar 450 are electrically in the same phase, and they can be 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 as to be superimposed and electrically connected to the three-phase AC motor 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 switching output busbar 250 and the three-phase AC output of the second switching output busbar 450 are electrically different from each other by, for example, 60°. The combination of the three-phase AC output of the output bus 250 and the three-phase AC output of the second switching output bus 450 provides a six-phase AC output for a 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 embodiment of the present invention is installed and applied to an electric vehicle to drive the AC motor, the electric vehicle of the embodiment of the present invention is formed. The electric vehicle in the embodiment of the present invention may 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, and W1 and W2 are respectively connected to the three-phase windings of the three-phase AC motor. When a six-phase AC motor is used, the three-phase AC output of the first switching output busbar 250 and the three-phase AC output of the second switching output busbar 450 are electrically different from each other by, 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 invention is not limited to be applied to electric vehicles. It will be understood from the above disclosure that the PEU 10 of the embodiment of the present invention can also be applied to a machine or a machine that has usage requirements similar to the AC motor of an electric vehicle. on the device.

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

The above examples mainly illustrate the power electronic controller and electric vehicle of the present invention. Although only a few of these embodiments of the present invention have been described, it will be understood by those of ordinary skill in the art that the present invention may be embodied in many other forms without departing from the spirit and scope thereof. Accordingly, the examples and embodiments shown are to be regarded as illustrative and not restrictive, and various modifications are possible within the present invention without departing from the spirit and scope of the invention as defined by the appended claims. with replacement.

Claims (18)

1. An electronic power controller (10) for providing an ac input to and controlling an ac motor, comprising:

a first inversion power module assembly (200) and a second inversion power module assembly (400) which are arranged in parallel; and

a cooling interlayer (300) interposed between the first and second inverter power module assemblies;

wherein the first and second inverter power module assemblies (200, 400) are connected in parallel from the same high voltage dc input terminal (101) of the power electronic controller (10) to an external high voltage dc power supply and output ac output in parallel to the ac output terminal (24) thereof;

a cooling flow channel (310) common to the first inverter power module assembly (200) and the second inverter power module assembly (400) is arranged in the cooling interlayer (300);

the first inverter power module assembly (200) and the second inverter power module assembly (400) are respectively provided with heat dissipation parts (221, 421), and the heat dissipation parts (221, 421) at least partially extend into the cooling flow channel (310) in an opposite manner.

2. The power electronic controller (10) of claim 1, wherein a dc bus bar assembly (100) electrically connected to the high voltage dc input terminal (101) for equally dividing the external high voltage dc power source into two dc inputs is provided inside the power electronic controller (10); the direct current bus bar assembly (100) is provided with a first direct current bar (120) and a second direct current bar (140) which are arranged in parallel and correspond to the two direct current inputs respectively, and the first inversion power module assembly (200) and the second inversion power module assembly (400) are electrically connected to the first direct current bar (120) and the second direct current bar (140) respectively.

3. The electronic power controller of claim 2, wherein the dc bus assembly (100) further comprises a filter capacitor (110) and a filter inductor (130).

4. The power electronic controller (10) of claim 1, wherein the first inverter power module assembly (200) and the second inverter power module assembly (400) each comprise:

a capacitance (210, 410);

a switching power module (220, 420); and

a drive circuit (230, 430);

wherein the heat dissipation members (221, 421) are respectively disposed on the switching power modules (220, 420).

5. The electronic power controller (10) of claim 4, wherein the capacitors (210, 410) of the first and second inverter power module assemblies (200, 400) are attached to the upper and lower surfaces of the cooling sandwich (300), respectively, or are at least partially disposed in the cooling flow channels (310) of the cooling sandwich (300).

6. The power electronic controller (10) of claim 1 or 4, wherein the first inverter power module assembly (200) includes a first AC output bus interface (240) for configuring the AC output (24), and the second inverter power module assembly (400) includes a second AC output bus interface (440) for configuring the AC output (24).

7. The electronic power controller (10) of claim 6, wherein a switching bus (442) for forming the ac output (24) is provided in each case for the second ac output bus interface (440)/the first ac output bus interface (240), wherein a first end of the switching bus (442) is connected to the second ac output bus interface (440)/the first ac output bus interface (240).

8. The electronic power controller (10) of claim 7, wherein a height of the transition bus (442) is equal to a difference in height of the first ac output bus interface (240) and the second ac output bus interface (440), and wherein the second end of the transition bus (442) and the first ac output bus interface (240)/the second ac output bus interface (440) are linearly arranged at a same height.

9. The electronic power controller (10) of claim 7 or 8, wherein a first switching output bus (250) for forming the ac output (24) is provided for the first ac output bus interface (240)/the second ac output bus interface (440), a second switching output bus (450) for forming the ac output (24) is provided for the second end of the switching bus (442), and the first switching output bus (250) and the second switching output bus (450) are arranged linearly next to one another.

10. The power electronic controller (10) of claim 9, wherein the ac output (24) further comprises a filter inductance (245) disposed on the first and second transition output bus bars (250, 450).

11. The power electronic controller (10) of claim 4, wherein the first and second inverter power module assemblies (200, 400) each further comprise a current sensor (260).

12. The power electronic controller (10) of claim 1 wherein the ac output (24) has three phase lines corresponding to a first three phase ac output of a first inverter power module assembly (200) and three phase lines corresponding to a second three phase ac output of a second inverter power module assembly (400).

13. The power electronic controller (10) of claim 12 wherein the three phase lines of the first three phase ac output and the three phase lines of the second three phase ac output are electrically connected in superposition to three phase windings of a three phase ac motor.

14. The electronic power controller (10) of claim 12, wherein the three phase lines for the first three-phase ac output and the three phase lines for the second three-phase ac output are each electrically connected to a six-phase winding of a six-phase ac motor.

15. The power electronic controller (10) of claim 1, wherein the power electronic controller (10) is configured as a box structure (11), and the first inverter power module assembly (200), the cooling sandwich (300), and the second inverter power module assembly (400) are used to form an upper layer, a middle layer, and a lower layer of the box structure (11), respectively.

16. The power electronic controller (10) of claim 15, wherein the cooling sandwich (300) is configured as part of a main box of the box structure (11), and the first and second inverter power module assemblies (200, 400) are symmetrically distributed on upper and lower sides of the cooling sandwich (300).

17. The power electronic controller (10) of claim 1, wherein the power electronic controller (10) further comprises a low voltage control circuit (500) and a shield plate (600), wherein the shield plate (600) is disposed between the low voltage control circuit (500) and the first or second inverter power module assembly (200, 400) for shielding electromagnetic interference of high voltage current signals.

18. An electric vehicle comprising an alternating current motor for outputting power, characterized by further comprising an electronic power controller (10) according to any one of claims 1 to 17.

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