A power module

Abstract

The application discloses a power module, comprising K driving and power unit modules, each of which comprises M driving circuits and N power switching devices. The K driving and power unit modules work independently and in parallel in the same power module. The M driving circuits and N power switching devices are packaged in the same power module. The volume of the whole power module is reduced, the power density is improved, and the compact layout can reduce the stray inductance of the whole power module design, so that the overall circuit dynamic performance of the power module is better, and the efficiency is higher.

Description

Technical Field

[0001] This application relates to the field of on-board chargers, and in particular to a power module for on-board charger applications. Background Technology

[0002] An on-board charger (OBC) is a device that converts AC power into DC power, transforming the AC power from the power station into the DC power required by the battery. OBCs are energy conversion devices used to charge electric vehicles, with output power primarily ranging from 3.3kW to 22kW. The hardware of common OBCs is typically implemented using independent drive circuits and discrete power devices, resulting in large size and weight, significant efficiency losses, high costs, and complex thermal management. Utility Model Content

[0003] In view of the above problems, the purpose of this utility model is to provide a power module for vehicle charging, which aims to improve the integration density, power density, efficiency, heat dissipation, and stray inductance of the power module applied to vehicle chargers.

[0004] According to this application, a power module is provided, comprising K drivers and power units, wherein K is a positive integer greater than or equal to 1, and each driver and power unit includes:

[0005] M driving circuits, each driving circuit including: a first input terminal and a second input terminal; the first input terminal receives and amplifies the PWM control signal of the upper bridge power device, so that the output terminal of the driving circuit outputs the driving signal of the upper bridge power device; the second input terminal receives and amplifies the PWM control signal of the lower bridge power device, so that the output terminal of the driving circuit outputs the driving signal of the lower bridge power device; M is a positive integer greater than or equal to; the M driving circuits output driving signals for M upper bridge power devices and driving signals for M lower bridge power devices;

[0006] There are N power switching devices, including M upper-bridge power switching devices and M lower-bridge power switching devices. The first terminal of each upper-bridge power device is connected to the output terminal of the corresponding driving circuit and receives the driving signal of the upper-bridge power device. One driving signal of an upper-bridge power device drives one upper-bridge power switching device. The first terminal of each lower-bridge power device is connected to the output terminal of the corresponding driving circuit and receives the driving signal of the lower-bridge power device. One driving signal of a lower-bridge power device drives one lower-bridge power switching device.

[0007] The K drive and power units are in the same power module and work independently and in parallel with each other;

[0008] The M drive circuits and N power switching devices are packaged in the same power module.

[0009] Optionally, the power module further includes M AC terminals, one DC positive terminal, and one DC negative terminal.

[0010] The upper bridge power switch and the lower bridge power switch form a group. The second end of the upper bridge power switch and the third end of the lower bridge power switch in the group are connected and serve as the corresponding AC terminals. The third end of the upper bridge power switch in each group is connected to the DC positive terminal, and the second end of the lower bridge power switch in each group is connected to the DC negative terminal.

[0011] Optionally, each drive and power unit includes:

[0012] A driving circuit comprises two power switching devices, which are divided into an upper bridge power switching device and a lower bridge power switching device. The first terminal of the upper bridge power switching device is connected to the output terminal of the driving circuit and receives the driving signal from the upper bridge power switching device. The first terminal of the lower bridge power switching device is connected to the output terminal of the driving circuit and receives the driving signal from the lower bridge power switching device.

[0013] The driving circuit and the two power switching devices are packaged in the same power module; the two power switching devices form a single-phase half-bridge topology.

[0014] The power module further includes: an AC terminal, a DC positive terminal, and a DC negative terminal. The upper bridge power switch and the lower bridge power switch are a group. The second end of the upper bridge power switch and the third end of the lower bridge power switch are connected and serve as the AC terminal. The third end of the upper bridge power switch is connected to the DC positive terminal, and the second end of the lower bridge power switch is connected to the DC negative terminal.

[0015] Optionally, each drive and power unit includes:

[0016] Two driving circuits are provided, each including a first input terminal and a second input terminal. The first input terminal receives and amplifies the PWM control signal of the upper bridge power device, thereby outputting a driving signal for the upper bridge power device at the output terminal of the driving circuit. The second input terminal receives and amplifies the PWM control signal of the lower bridge power device, thereby outputting a driving signal for the lower bridge power device at the output terminal of the driving circuit. The two driving circuits output driving signals for two upper bridge power devices and driving signals for two lower bridge power devices.

[0017] Four power switching devices are provided, which are divided into two upper-bridge power switching devices and two lower-bridge power switching devices. The first end of the first upper-bridge power device is connected to the output end of the first driving circuit and receives the driving signal of the first upper-bridge power device. The first end of the second upper-bridge power device is connected to the output end of the second driving circuit and receives the driving signal of the second upper-bridge power device. The first end of the first lower-bridge power device is connected to the output end of the first driving circuit and receives the driving signal of the first lower-bridge power device. The first end of the second lower-bridge power device is connected to the output end of the second driving circuit and receives the driving signal of the second lower-bridge power device.

[0018] The two drive and power units are in the same power module and work independently and in parallel.

[0019] The two drive circuits and four power switching devices are packaged in the same power module; the four power switching devices form a single-phase full-bridge topology.

[0020] The power module includes two AC terminals, one DC positive terminal, and one DC negative terminal. One upper bridge power switch and one lower bridge power switch form a group. The second end of the upper bridge power switch and the third end of the lower bridge power switch in the first group are connected to the first AC terminal. The second end of the upper bridge power switch and the third end of the lower bridge power switch in the second group are connected to the second AC terminal. The third end of the upper bridge power switch in each group is connected to the DC positive terminal, and the second end of the lower bridge power switch in each group is connected to the DC negative terminal.

[0021] Optionally, each drive and power unit includes:

[0022] Three driving circuits are provided, each including a first input terminal and a second input terminal; the first input terminal receives and amplifies the PWM control signal of the upper bridge power device, thereby outputting a driving signal for the upper bridge power device at the output terminal of the driving circuit; the second input terminal receives and amplifies the PWM control signal of the lower bridge power device, thereby outputting a driving signal for the lower bridge power device at the output terminal of the driving circuit; the three driving circuits output driving signals for three upper bridge power devices and driving signals for three lower bridge power devices.

[0023] Six power switching devices are provided, comprising three upper-bridge power switching devices and three lower-bridge power switching devices. The first terminal of the first upper-bridge power switching device is connected to the output terminal of the first driving circuit and receives its driving signal. The first terminal of the second upper-bridge power switching device is connected to the output terminal of the second driving circuit and receives its driving signal. The first terminal of the third upper-bridge power switching device is connected to the output terminal of the third driving circuit and receives its driving signal. The first terminal of the first lower-bridge power switching device is connected to the output terminal of the first driving circuit and receives its driving signal. The first terminal of the second lower-bridge power switching device is connected to the output terminal of the second driving circuit and receives its driving signal. The first terminal of the third lower-bridge power switching device is connected to the output terminal of the third driving circuit and receives its driving signal.

[0024] The three drive and power units are in the same power module and work independently and in parallel with each other.

[0025] The three drive circuits and six power switching devices are packaged in the same power module; the six power switching devices form a three-phase full-bridge topology.

[0026] The power module includes three AC terminals, one DC positive terminal, and one DC negative terminal. One upper-bridge power switch and one lower-bridge power switch form a group. The second end of the upper-bridge power switch and the third end of the lower-bridge power switch in the first group are connected to the first AC terminal. The second end of the upper-bridge power switch and the third end of the lower-bridge power switch in the second group are connected to the second AC terminal. The second end of the upper-bridge power switch and the third end of the lower-bridge power switch in the third group are connected to the third AC terminal. The third end of the upper-bridge power switch in each group is connected to the DC positive terminal, and the second end of the lower-bridge power switch in each group is connected to the DC negative terminal.

[0027] Optionally, the power switching device is a combination of the emitter diode of an IGBT connected to the anode and the collector connected to the cathode of the diode, or one of RC-IGBT, Si MOSFET, SiC MOSFET, or GaN HEMT.

[0028] Optionally, the N power switching devices form one of a single-phase half-bridge topology, a single-phase full-bridge topology, or a three-phase full-bridge topology.

[0029] Optionally, the driving circuit is a half-bridge drive or a full-bridge drive.

[0030] Optionally, the power module driven by the half-bridge further includes a sampling circuit, which samples one or more of the temperature, current, and voltage of the power switching device, and outputs a sampling signal at its output terminal.

[0031] Optionally, each of the K drive and power units has a sampling circuit.

[0032] Optionally, the K drive and power units share a single sampling circuit.

[0033] Optionally, the power module of the half-bridge driver further includes a level conversion circuit, which receives an external power supply signal and converts the external power supply signal into a power supply signal to provide to the M driving circuits.

[0034] Optionally, each of the K drive and power units has a level shifting circuit.

[0035] Optionally, the K drive and power units share a single level shifting circuit.

[0036] Optionally, the K drive and power units can be arranged longitudinally, laterally, or in a cross-coupled manner.

[0037] Optionally, M AC terminals, one DC positive terminal, and one DC negative terminal are located on the same side of the power module.

[0038] This application provides a half-bridge driven power module.

[0039] The M driving circuits and N power switching devices are packaged in the same power module. Furthermore, the sampling circuit and level conversion circuit are also packaged in the same power module. In the power module provided in this application, an upper-bridge power switching device and a lower-bridge power switching device are grouped together. The second terminal of the upper-bridge power switching device and the third terminal of the lower-bridge power switching device in each group are connected and serve as the corresponding AC terminals. The third terminal of the upper-bridge power switching device in each group is connected to the DC positive terminal, and the second terminal of the lower-bridge power switching device in each group is connected to the DC negative terminal. All upper-bridge power devices in each group share a DC positive terminal, and all lower-bridge power devices in each group share a DC negative terminal. This reduces the number of terminals, reduces the overall size of the power module, and increases the power density. At the same time, the more compact layout can reduce the stray inductance of the entire power module design, resulting in better overall circuit dynamic performance and higher efficiency of the power module. Attached Figure Description

[0040] The above and other objects, features and advantages of this application will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0041] Figure 1This is a schematic diagram of the structure of Embodiment 1.

[0042] Figure 2 This is a topology diagram of two power switching devices in Example 1.

[0043] Figure 3 This is a schematic diagram of the structure of Example 2.

[0044] Figure 4 This is a topology diagram of four power switching devices in Example 2.

[0045] Figure 5 This is a schematic diagram of the structure of Example 3.

[0046] Figure 6 This is a topology diagram of six power switching devices in Example 3. Detailed Implementation

[0047] The present application is described below based on embodiments, but it is not limited to these embodiments. In the detailed description of the present application below, certain specific details are described in detail. Those skilled in the art can fully understand the present application without these details. To avoid obscuring the substance of the present application, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0048] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0049] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] For ease of explanation, spatially related terms such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “below” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplified term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0051] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0052] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0053] Figure 1 This is a schematic diagram of a power module structure provided in one embodiment of the present invention. In this embodiment, each drive and power unit includes:

[0054] The drive circuit 1-1 includes a first input terminal and a second input terminal. The first input terminal receives and amplifies the PWM control signal of the upper bridge power device, thereby outputting a drive signal for the upper bridge power device at the output terminal of the drive circuit 1-1. The second input terminal receives and amplifies the PWM control signal of the lower bridge power device, thereby outputting a drive signal for the lower bridge power device at the output terminal of the drive circuit 1-1. One drive circuit outputs a drive signal for one upper bridge power device and a drive signal for one lower bridge power device.

[0055] An upper-bridge power switch 2-1 and a lower-bridge power switch 2-1 are grouped together to form a single-phase half-bridge topology. The first terminal of the upper-bridge power switch 2-1 is connected to the output terminal of the drive circuit 1-1 and receives its drive signal. The first terminal of the lower-bridge power switch 2-1 is also connected to the output terminal of the drive circuit 1-1 and receives its drive signal. One drive circuit and two power switches are packaged in the same power module.

[0056] The power module in this embodiment further includes: an AC terminal: AC1 terminal, a DC positive terminal: DC+ terminal, and a DC negative terminal: DC- terminal. The second end of the upper bridge power switch device and the third end of the lower bridge power switch device are connected and serve as the AC terminal (AC1). The third end of the upper bridge power switch device 2-1 is connected to the DC positive terminal (DC+ terminal), and the second end of the lower bridge power switch device 2-1 is connected to the DC negative terminal (DC- terminal).

[0057] Figure 2 This is a power circuit topology diagram provided for one embodiment of the present invention.

[0058] Figure 3 This is a schematic diagram of a power module structure provided in another embodiment of the present invention. In this embodiment, each drive and power unit includes:

[0059] The first driving circuit 1-1 and the second driving circuit 1-2 each include a first input terminal and a second input terminal. The first input terminal receives and amplifies the PWM control signal of the upper bridge power device, thereby outputting the driving signal of the upper bridge power device at the output terminal of the driving circuit. The second input terminal receives and amplifies the PWM control signal of the lower bridge power device, thereby outputting the driving signal of the lower bridge power device at the output terminal of the driving circuit. The two driving circuits output driving signals for two upper bridge power devices and driving signals for two lower bridge power devices.

[0060] The first upper-bridge power switch 2-1, the second upper-bridge power switch 2-2, the first lower-bridge power switch 2-1, and the second lower-bridge power switch 2-2 form a single-phase full-bridge topology. The first terminal of the first upper-bridge power switch 2-1 is connected to the output of the drive circuit 1-1 and receives the drive signal from the upper-bridge power switch 2-1. The first terminal of the first lower-bridge power switch 2-1 is also connected to the output of the drive circuit 1-1 and receives the drive signal from the lower-bridge power switch 2-1. The first terminal of the second upper-bridge power switch 2-2 is connected to the output of the drive circuit 1-2 and receives the drive signal from the upper-bridge power switch 2-2. The first terminal of the second lower-bridge power switch 2-2 is also connected to the output of the drive circuit 1-2 and receives the drive signal from the second lower-bridge power switch 2-2. One drive circuit and two power switches are packaged in the same power module.

[0061] The power module in this embodiment further includes: two AC terminals: AC1 terminal and AC2 terminal, one DC positive terminal: DC+ terminal, and one DC negative terminal: DC- terminal. The first upper-bridge power switch device 2-1 and the first lower-bridge power switch device 2-1 form a group, with the second end of the first upper-bridge power switch device and the third end of the first lower-bridge power switch device connected and serving as the AC terminal (AC1). The second upper-bridge power switch device 2-2 and the second lower-bridge power switch device 2-2 form a group, with the second end of the second upper-bridge power switch device and the third end of the second lower-bridge power switch device connected and serving as the AC terminal (AC2). The third end of all upper-bridge power switch devices is connected to the DC positive terminal (DC+ terminal), and the second end of all lower-bridge power switch devices is connected to the DC negative terminal (DC- terminal).

[0062] Figure 4 for Figure 2 This is a power circuit topology diagram provided for yet another embodiment of the present invention.

[0063] Figure 5 This is a schematic diagram of a power module structure provided in another embodiment of the present invention. In this embodiment, each drive and power unit includes:

[0064] The first drive circuit 1-1, the second drive circuit 1-2, and the third drive circuit 1-3 each include a first input terminal and a second input terminal. The first input terminal receives and amplifies the PWM control signal of the upper bridge power device, thereby outputting the drive signal of the upper bridge power device at the output terminal of the drive circuit. The second input terminal receives and amplifies the PWM control signal of the lower bridge power device, thereby outputting the drive signal of the lower bridge power device at the output terminal of the drive circuit. The three drive circuits output drive signals for three upper bridge power devices and drive signals for three lower bridge power devices.

[0065] The six power switching devices—first upper bridge power switching device 2-1, second upper bridge power switching device 2-2, third upper bridge power switching device 2-3, first lower bridge power switching device 2-1, second lower bridge power switching device 2-2, and third lower bridge power switching device 2-3—form a three-phase full-bridge topology. The first terminal of the first upper bridge power switching device 2-1 is connected to the output terminal of the drive circuit 1-1 and receives the drive signal from the upper bridge power switching device 2-1. The first terminal of the first lower bridge power switching device 2-1 is connected to the output terminal of the drive circuit 1-1 and receives the drive signal from the lower bridge power switching device 2-1. The first terminal of the second upper bridge power switching device 2-2 is connected to the output terminal of the drive circuit 1-2 and receives the drive signal from the upper bridge power switching device 2-2. The first terminal of the second lower bridge power switching device 2-2 is connected to the output terminal of the drive circuit 1-2 and receives the drive signal from the second lower bridge power switching device 2-2. The first terminal of the third upper bridge power device 2-3 is connected to the output terminal of the drive circuit 1-3 and receives the drive signal from the upper bridge power device 2-3. The first terminal of the third lower bridge power device 2-3 is connected to the output terminal of the drive circuit 1-3 and receives the drive signal from the third lower bridge power device 2-3. The three drive circuits and six power switching devices are packaged in the same power module.

[0066] The power module in this embodiment further includes: three AC terminals: AC1, AC2, and AC3; one DC positive terminal: DC+; and one DC negative terminal: DC-. The first upper-bridge power switch 2-1 and the first lower-bridge power switch 2-1 form a group, with the second end of the first upper-bridge power switch and the third end of the first lower-bridge power switch connected as the AC terminal (AC1). The second upper-bridge power switch 2-2 and the second lower-bridge power switch 2-2 form a group, with the second end of the second upper-bridge power switch and the third end of the second lower-bridge power switch connected as the AC terminal (AC2). The third upper-bridge power switch 2-3 and the third lower-bridge power switch 2-3 form a group, with the second end of the third upper-bridge power switch and the third end of the third lower-bridge power switch connected as the AC terminal (AC3). The third ends of all upper-bridge power switches are connected to the DC positive terminal (DC+), and the second ends of all lower-bridge power switches are connected to the DC negative terminal (DC-).

[0067] Figure 6 This is a power circuit topology diagram provided for yet another embodiment of the present invention.

[0068] As described above, these embodiments of this application do not exhaustively cover all details, nor do they limit the application to merely the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A power module, characterized in that, It includes K drive and power units, where K is a positive integer greater than or equal to 1, and each drive and power unit includes: M driving circuits, each driving circuit including: a first input terminal and a second input terminal; the first input terminal receives and amplifies the PWM control signal of the upper bridge power device, so that the output terminal of the driving circuit outputs the driving signal of the upper bridge power device; the second input terminal receives and amplifies the PWM control signal of the lower bridge power device, so that the output terminal of the driving circuit outputs the driving signal of the lower bridge power device; M is 1, 2, or 3; the M driving circuits output driving signals for M upper bridge power devices and driving signals for M lower bridge power devices; There are N power switching devices, including M upper-bridge power switching devices and M lower-bridge power switching devices. The first terminal of each upper-bridge power device is connected to the output terminal of the corresponding driving circuit and receives the driving signal of the upper-bridge power device. The driving signal of one upper-bridge power device drives one upper-bridge power switching device. The first terminal of each lower-bridge power device is connected to the output terminal of the corresponding driving circuit and receives the driving signal of the lower-bridge power device. The driving signal of one lower-bridge power device drives one lower-bridge power switching device. The K drive and power units are in the same power module and work independently and in parallel with each other; The M drive circuits and N power switching devices are packaged in the same power module.

2. The power module according to claim 1, characterized in that, The power module also includes M AC terminals, one DC positive terminal, and one DC negative terminal. The upper bridge power switch and the lower bridge power switch form a group. The second end of the upper bridge power switch and the third end of the lower bridge power switch in the group are connected and serve as the corresponding AC terminals. The third end of the upper bridge power switch in each group is connected to the DC positive terminal, and the second end of the lower bridge power switch in each group is connected to the DC negative terminal.

3. The power module according to claim 2, characterized in that, Each drive and power unit includes: A driving circuit includes: a first input terminal and a second input terminal; the first input terminal receives and amplifies the PWM control signal of the upper bridge power device, thereby outputting a driving signal for the upper bridge power device at the output terminal of the driving circuit; the second input terminal receives and amplifies the PWM control signal of the lower bridge power device, thereby outputting a driving signal for the lower bridge power device at the output terminal of the driving circuit; the driving circuit outputs a driving signal for the upper bridge power device and a driving signal for the lower bridge power device. Two power switching devices are provided, namely an upper bridge power switching device and a lower bridge power switching device. The first end of the upper bridge power switching device is connected to the output end of the driving circuit and receives the driving signal of the upper bridge power switching device. The first end of the lower bridge power switching device is connected to the output end of the driving circuit and receives the driving signal of the lower bridge power switching device. The driving circuit and the two power switching devices are packaged in the same power module; the two power switching devices form a single-phase half-bridge topology. The power module further includes: an AC terminal, a DC positive terminal, and a DC negative terminal. The upper bridge power switch and the lower bridge power switch are a group. The second end of the upper bridge power switch and the third end of the lower bridge power switch are connected and serve as the AC terminal. The third end of the upper bridge power switch is connected to the DC positive terminal, and the second end of the lower bridge power switch is connected to the DC negative terminal.

4. The power module according to claim 2, characterized in that, Each drive and power unit includes: Two driving circuits are provided, each including a first input terminal and a second input terminal. The first input terminal receives and amplifies the PWM control signal of the upper bridge power device, thereby outputting a driving signal for the upper bridge power device at the output terminal of the driving circuit. The second input terminal receives and amplifies the PWM control signal of the lower bridge power device, thereby outputting a driving signal for the lower bridge power device at the output terminal of the driving circuit. The two driving circuits output driving signals for two upper bridge power devices and driving signals for two lower bridge power devices. Four power switching devices are provided, which are divided into two upper-bridge power switching devices and two lower-bridge power switching devices. The first end of the first upper-bridge power device is connected to the output end of the first driving circuit and receives the driving signal of the first upper-bridge power device. The first end of the second upper-bridge power device is connected to the output end of the second driving circuit and receives the driving signal of the second upper-bridge power device. The first end of the first lower-bridge power device is connected to the output end of the first driving circuit and receives the driving signal of the first lower-bridge power device. The first end of the second lower-bridge power device is connected to the output end of the second driving circuit and receives the driving signal of the second lower-bridge power device. The two drive and power units are in the same power module and work independently and in parallel. The two drive circuits and four power switching devices are packaged in the same power module; the four power switching devices form a single-phase full-bridge topology. The power module includes two AC terminals, one DC positive terminal, and one DC negative terminal. One upper bridge power switch and one lower bridge power switch form a group. The second end of the upper bridge power switch and the third end of the lower bridge power switch in the first group are connected to the first AC terminal. The second end of the upper bridge power switch and the third end of the lower bridge power switch in the second group are connected to the second AC terminal. The third end of the upper bridge power switch in each group is connected to the DC positive terminal, and the second end of the lower bridge power switch in each group is connected to the DC negative terminal.

5. The power module according to claim 2, characterized in that, Each drive and power unit includes: Three driving circuits are provided, each including a first input terminal and a second input terminal; the first input terminal receives and amplifies the PWM control signal of the upper bridge power device, thereby outputting a driving signal for the upper bridge power device at the output terminal of the driving circuit; the second input terminal receives and amplifies the PWM control signal of the lower bridge power device, thereby outputting a driving signal for the lower bridge power device at the output terminal of the driving circuit; the three driving circuits output driving signals for three upper bridge power devices and driving signals for three lower bridge power devices. Six power switching devices are provided, comprising three upper-bridge power switching devices and three lower-bridge power switching devices. The first terminal of the first upper-bridge power switching device is connected to the output terminal of the first driving circuit and receives its driving signal. The first terminal of the second upper-bridge power switching device is connected to the output terminal of the second driving circuit and receives its driving signal. The first terminal of the third upper-bridge power switching device is connected to the output terminal of the third driving circuit and receives its driving signal. The first terminal of the first lower-bridge power switching device is connected to the output terminal of the first driving circuit and receives its driving signal. The first terminal of the second lower-bridge power switching device is connected to the output terminal of the second driving circuit and receives its driving signal. The first terminal of the third lower-bridge power switching device is connected to the output terminal of the third driving circuit and receives its driving signal. The three drive and power units are in the same power module and work independently and in parallel with each other. The three drive circuits and six power switching devices are packaged in the same power module; the six power switching devices form a three-phase full-bridge topology. The power module includes three AC terminals, one DC positive terminal, and one DC negative terminal. An upper-bridge power switch and a lower-bridge power switch form a group. The second terminal of the upper-bridge power switch and the third terminal of the lower-bridge power switch in the first group are connected to the first AC terminal. The second terminal of the upper-bridge power switch and the third terminal of the lower-bridge power switch in the second group are connected to the second AC terminal. The second terminal of the upper-bridge power switch and the third terminal of the lower-bridge power switch in the third group are connected to the third AC terminal. The third terminal of the upper-bridge power switch in each group is connected to the DC positive terminal, and the second terminal of the lower-bridge power switch in each group is connected to the DC negative terminal.

6. The power module according to claim 1, characterized in that, The power switching device is a combination of an IGBT with the emitter diode connected to the anode and the collector connected to the cathode of the diode, or one of RC-IGBT, Si MOSFET, SiC MOSFET, or GaN HEMT.

7. The power module according to claim 1, characterized in that, The N power switching devices form one of a single-phase half-bridge topology, a single-phase full-bridge topology, or a three-phase full-bridge topology.

8. The power module according to claim 1, characterized in that, The driving circuit is a half-bridge drive or a full-bridge drive.

9. The power module according to claim 1, characterized in that, It also includes a sampling circuit, which samples one or more of the temperature, current, and voltage of the power switching device, and outputs a sampling signal at the output terminal of the sampling circuit.

10. The power module according to claim 9, characterized in that, Each of the K drive and power units has a sampling circuit.

11. The power module according to claim 9, characterized in that, The K drive and power units share a single sampling circuit.

12. The power module according to claim 1, characterized in that, It also includes a level conversion circuit, which receives an external power signal and converts the external power signal into a power supply signal to provide to the M driving circuits.

13. The power module according to claim 11, characterized in that, Each of the K drive and power units has a level conversion circuit.

14. The power module according to claim 11, characterized in that, The K drive and power units share a single level conversion circuit.

15. The power module according to claim 1, characterized in that, The K drive and power units can be arranged longitudinally, laterally, or in a cross-coupled configuration.

16. The power module according to claim 1, characterized in that, M AC terminals, one DC positive terminal, and one DC negative terminal are located on the same side of the power module.

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