Motor driving device, vehicle control system and vehicle

Abstract

The utility model provides a motor driving device, a vehicle control system and a vehicle, and relates to the technical field of automobiles. The device comprises an axial magnetic flux motor, a motor driver, a vehicle-mounted charger and a power supply, the power supply is respectively connected with the motor driver and the vehicle-mounted charger; wherein the axial magnetic flux motor comprises a plurality of stators; an alternating current output end of the motor driver is connected with a first stator in the plurality of stators; and the alternating current output end of the vehicle-mounted charger is connected with a second stator in the plurality of stators. According to the invention, the effect of a high-power driving motor can be safely and reliably realized with low cost and low space consumption.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more particularly to an electric motor drive device, a vehicle control system, and a vehicle. Background Technology

[0002] In some scenarios, such as high-speed driving or emergency situations, a larger power drive motor is required to meet the vehicle's driving needs.

[0003] In one implementation, the requirements of the above scenario can be met by increasing the power of the motor driver.

[0004] However, this implementation method not only increases costs but also occupies more hardware space. Utility Model Content

[0005] This application provides a motor drive device, a vehicle control system, and a vehicle to achieve the effect of increasing motor drive power in a low-cost, low-space-consumption, safe, and reliable manner.

[0006] In a first aspect, this application provides a motor drive device, comprising: an axial flux motor, a motor driver, an on-board charger, and a power supply; wherein the power supply is connected to both the motor driver and the on-board charger; and wherein...

[0007] The axial flux motor includes multiple stators;

[0008] The AC output terminal of the motor driver is connected to the first stator among the plurality of stators; the AC output terminal of the on-board charger is connected to the second stator among the plurality of stators.

[0009] Optionally, the on-board charger includes at least a converter; the device further includes: a first switching assembly; wherein,

[0010] One end of the converter is connected to the power supply; the other end of the converter is connected to one end of the first switching assembly, and the other end of the first switching assembly is connected to the second stator.

[0011] The converter is used to convert the DC power supplied by the power supply into AC power, and then transmit it to the second stator via the first switching assembly.

[0012] Optionally, the converter includes at least a first conversion circuit and a second conversion circuit; wherein the first conversion circuit is used to determine the voltage output to the second stator; and the second conversion circuit is used to convert direct current to alternating current; wherein,

[0013] One end of the first conversion circuit is connected to the power supply; the other end of the first conversion circuit is connected to one end of the second conversion circuit; and the other end of the second conversion circuit is connected to one end of the first switching assembly.

[0014] Optionally, the second stator includes a three-phase winding; the first switching assembly includes a first switch connected to a first phase winding of the second stator, a second switch connected to a second phase winding of the second stator, and a third switch connected to a third phase winding of the second stator.

[0015] Optionally, the motor driver includes an inverter; wherein,

[0016] One end of the inverter is connected to the power supply; the other end of the inverter is connected to the first stator; the inverter is used to convert the DC power provided by the power supply into AC power and then transmit it to the first stator.

[0017] Optionally, the first stator includes three-phase windings; the inverter indicates a three-phase bridge circuit; wherein,

[0018] One end of the three-phase bridge circuit is connected to the three-phase windings of the first stator respectively; the other end of the three-phase bridge circuit is connected to the power supply.

[0019] Secondly, this application provides a vehicle control system, the system comprising: the motor drive device described in any one of the first aspects.

[0020] Optionally, the system further includes: a second switching assembly; wherein one end of the second switching assembly is connected to the on-board charger in the motor drive device; and the other end of the second switching assembly is connected to the vehicle's AC load.

[0021] Optionally, the motor drive device includes a first switching assembly; the first switching assembly and the second switching assembly are connected in parallel.

[0022] Thirdly, this application provides a vehicle including the vehicle control system described in any one of the second aspects.

[0023] The motor drive device, vehicle control system, and vehicle provided in this application achieve isolation between the AC output terminals of the motor drive and the on-board charger by connecting the AC output terminal of the motor driver to the first stator of the axial flux motor and the AC output terminal of the on-board charger to the second stator of the axial flux motor. This avoids circulating current caused by direct parallel connection, thereby improving the safety and stability of the motor drive. Furthermore, by driving different stators with the motor driver and the on-board charger, a safety redundancy capability is provided for the motor drive. This ensures that the motor drive capability remains intact even if any device in the motor driver or on-board charger fails, or if any stator fails, further improving the safety and reliability of the motor drive device. In addition, this implementation avoids achieving a high-power drive motor by increasing the power of the motor driver, thus saving hardware costs and space. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 A schematic diagram illustrating an implementation scenario for increasing motor drive power by connecting a motor driver and an on-board charger in parallel, as provided in this application.

[0026] Figure 2 A schematic diagram of the structure of a motor drive device provided in this application embodiment. Figure 1 ;

[0027] Figure 3 A schematic diagram of the structure of a motor drive device provided in this application embodiment. Figure 2 ;

[0028] Figure 4 A schematic diagram of the structure of a vehicle control system provided in this application;

[0029] Figure 5 This is a structural schematic diagram of a vehicle provided in an embodiment of this application.

[0030] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0032] First, the terms used in this application will be explained:

[0033] V2L mode: short for Vehicle to Load, refers to the function of a new energy vehicle's power battery supplying power to other loads through its on-board charger;

[0034] DC-DC converter: A device that converts one voltage value into another voltage value in a DC circuit.

[0035] In certain driving scenarios of new energy vehicles, a relatively high power output is typically required to drive the motor and meet the vehicle's driving needs. For example, when starting the vehicle, a high-power motor is usually needed to achieve rapid acceleration and increase the starting speed; or, in situations where the vehicle needs to make emergency maneuvers, the motor needs to provide a rapid response to ensure passenger safety. In these cases, a higher power output is required to drive the motor and meet the actual demands.

[0036] In one implementation, the requirements of the above scenario can be met by increasing the power of the motor driver. However, this implementation not only increases costs but also occupies more hardware space.

[0037] Therefore, how to meet the needs of high-power drive motors while reducing costs and saving hardware space has become an urgent problem to be solved.

[0038] Research has found that the on-board charger of an electric vehicle is usually not in operation while the vehicle is in motion, or it operates in V2L mode, outputting AC power to supply loads inside the vehicle. Therefore, a method could be devised to allow the on-board charger to operate in motor drive mode, thereby enabling the on-board charger and motor driver to jointly drive the motor and meet the high power demands during driving.

[0039] Generally, the AC output terminal of the motor driver can be connected in parallel with the AC output terminal of the on-board charger to increase the motor drive power.

[0040] For example, see Figure 1 , Figure 1This is a schematic diagram illustrating an implementation scenario where the motor drive power is increased by connecting the AC output terminals of a motor driver and an on-board charger in parallel, as provided in this application. Figure 1 As shown, this implementation scenario may include a vehicle's power battery 101, a motor driver 102, a three-phase drive motor 103, and an on-board charger 104. The motor driver 102 and the on-board charger 104 are respectively connected to the power battery 101 to convert the DC power provided by the power battery 101 into AC power. Simultaneously, the AC output terminals of the motor driver 102 and the on-board charger 104 are directly connected in parallel to achieve the superposition of drive currents to drive the motor.

[0041] In this implementation, the AC output terminal of the motor driver 102 is directly connected in parallel with the AC output terminal of the on-board charger 104 to achieve superposition of drive current. When the power corresponding to the motor driver 102 and the on-board charger 104 is not equal, it is necessary to solve the current sharing between the motor driver 102 and the on-board charger 104, as well as the phenomenon of circulating current that easily occurs between the motor driver 102 and the on-board charger 104. This not only increases the control complexity, but also easily affects the driving effect of the three-phase drive motor.

[0042] Based on this, this application provides a motor drive device that uses an on-board charger and a motor driver to jointly drive different stators of an axial flux motor, thereby avoiding direct parallel connection of the output currents of the on-board charger and the motor driver. This achieves the effects of enhanced drive power, reduced cost, space saving, and safety redundancy while avoiding circulating current.

[0043] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0044] See Figure 2 , Figure 2 A schematic diagram of the structure of a motor drive device provided in this application embodiment. Figure 1 ,like Figure 2 As shown, the device includes: an axial flux motor 201, a motor driver 202, an on-board charger 203, and a power supply 204. The power supply 204 is connected to both the motor driver 202 and the on-board charger 203.

[0045] The axial flux motor 201 includes multiple stators; the AC output terminal of the motor driver 202 is connected to the first stator among the multiple stators; and the AC output terminal of the on-board charger 203 is connected to the second stator among the multiple stators.

[0046] In one example, the power source can be the vehicle's battery or other power sources deployed in the vehicle. There is no limitation on the type of power source; the only requirement is that it can be implemented.

[0047] In one example, the number of stators included in the axial flux motor can be N, where N is a natural number greater than 1. For example, N can be 2, 3, 5, etc. The value of N is not limited here.

[0048] At this time, the number of first stators and second stators among the multiple stators can be at least one. Here, there is no limit to the number of first stators and second stators, as long as the sum of the number of first stators and second stators is equal to the number of multiple stators.

[0049] As described above, in this embodiment, by connecting the AC output terminal of the motor driver to the first stator of the axial flux motor and the AC output terminal of the on-board charger to the second stator of the axial flux motor, isolation between the AC output terminals of the motor driver and the on-board charger can be achieved. This avoids circulating current caused by direct parallel connection, thereby improving the safety and stability of the motor drive. Simultaneously, by driving different stators with the motor driver and the on-board charger, safety redundancy is provided for the motor drive. This ensures that the motor drive capability remains intact even if any device in the motor driver or on-board charger fails, or if any stator fails, further improving the safety and reliability of the motor drive device. Furthermore, this implementation avoids increasing the power of the motor driver to achieve a high-power drive motor, thus saving hardware costs and space.

[0050] In one possible implementation, when reusing the on-board charger motor to drive the axial flux motor, in order to ensure the normal use of the on-board charger motor, a switching assembly can be deployed between the on-board charger and the axial flux motor. This allows the switching assembly to be closed when the on-board charger motor is needed to drive the axial flux motor, and to be opened when the on-board charger motor is not needed to drive the axial flux motor, thereby improving the stability and flexibility of the reused on-board charger.

[0051] For example, see Figure 3 , Figure 3 A schematic diagram of the structure of a motor drive device provided in this application embodiment. Figure 2 ,like Figure 3 As shown, the device includes: an axial flux motor 301, a motor driver 302, an on-board charger 303, and a power supply 304. The power supply 304 is connected to both the motor driver 302 and the on-board charger 303.

[0052] The axial flux motor 301 includes multiple stators; the AC output terminal of the motor driver 302 is connected to the first stator among the multiple stators; and the AC output terminal of the on-board charger 303 is connected to the second stator among the multiple stators.

[0053] In one example, the on-board charger 303 includes at least a converter, such as... Figure 3 As shown, the motor drive device may include a first switching assembly. In this case, one end of the converter is connected to the power supply; the other end of the converter is connected to one end of the first switching assembly, and the other end of the first switching assembly is connected to the second stator. The converter is used to convert the DC power supplied by the power supply into AC power, which is then transmitted to the second stator via the first switching assembly.

[0054] This implementation method can convert the DC power supplied by the power supply into the AC power required by the axial flux motor through the converter included in the on-board charger, thereby realizing the control of the axial flux motor.

[0055] Optionally, such as Figure 3 As shown, the converter included in the on-board charger 303 can be divided into at least a first conversion circuit 3031 and a second conversion circuit 3032; wherein, the first conversion circuit 3031 is used to determine the voltage output to the second stator; and the second conversion circuit 3032 is used to convert DC power into AC power.

[0056] One end of the first conversion circuit 3031 is connected to the power supply; the other end of the first conversion circuit 3031 is connected to one end of the second conversion circuit 3032; and the other end of the second conversion circuit 3032 is connected to one end of the first switching assembly.

[0057] In this implementation, the voltage (i.e., current) to be transmitted to the second stator can be accurately determined by the first conversion circuit 3031, thereby achieving accurate driving of the axial flux motor. After the required voltage is determined by the first conversion circuit, it can be converted by the second conversion circuit to obtain AC power matching the axial flux motor, which is then transmitted to the second stator to drive part of the axial flux motor.

[0058] Optionally, the second conversion circuit may also integrate a power factor correction circuit, which can improve the phase consistency of the input current and voltage of the second stator, thereby reducing errors and improving the accuracy of motor drive.

[0059] In one possible implementation, the number of switching elements included in the first switching assembly is related to the type of windings included in the second stator. For example, if the second stator includes a single-phase winding, the first switching assembly includes one switching element; if the second stator includes a three-phase winding, the first switching assembly includes three switching elements; if the second stator includes a five-phase winding, the first switching assembly includes five switching elements, and so on.

[0060] For example, suppose that the second stator includes three-phase windings, then, as Figure 3 As shown, the first switching assembly includes a first switch K1 connected to the first phase winding of the second stator, a second switch K2 connected to the second phase winding of the second stator, and a third switch K3 connected to the third phase winding of the second stator.

[0061] This implementation method can satisfy the phase difference between the three-phase windings by using switches connected to each phase winding, thereby ensuring the stable operation of the axial flux motor.

[0062] Similarly, such as Figure 3 As shown, the motor driver may include an inverter. One end of the inverter is connected to a power supply; the other end of the inverter is connected to the first stator.

[0063] The inverter is used to convert the DC power supplied by the power supply into AC power and then transmit it to the first stator, thereby driving the axial flux motor by driving the first stator.

[0064] At this time, the type of inverter is associated with the type of windings included in the first stator. For example, when the first stator includes three-phase windings, the inverter can indicate a three-phase bridge circuit; wherein one end of the three-phase bridge circuit is connected to the three-phase windings of the first stator respectively; and the other end of the three-phase bridge circuit is connected to the power supply.

[0065] See Figure 4 , Figure 4 A schematic diagram of a vehicle control system provided in this application is shown below. Figure 4 As shown, the vehicle control system includes the aforementioned motor drive unit. For example, as... Figure 4 As shown, the motor drive unit included in the vehicle control system may include: an axial flux motor, a motor driver, an on-board charger, and a power supply.

[0066] At this time, the vehicle control system can drive the axial flux motor through the on-board charger in the motor drive device and / or the motor driver, thereby enabling high-power drive motors while providing a certain safety redundancy, thus improving the performance of the vehicle control system.

[0067] In one possible implementation, such as Figure 4 As shown, the motor drive unit included in the vehicle control system may also include a first switch assembly. In this case, the vehicle control system may also include a second switch assembly. One end of the second switch assembly is connected to the on-board charger in the motor drive unit, and the other end of the second switch assembly is connected to the AC load of the vehicle.

[0068] Optionally, when the motor drive device includes a first switching assembly, the first switching assembly and the second switching assembly are connected in parallel, so that the function used by the on-board charger can be selected through the first switching assembly and the second switching assembly. That is, the on-board charger can drive the axial flux motor, supply power to the load in the vehicle, or charge the vehicle's power battery, etc.

[0069] See Figure 5 , Figure 5 This application provides a schematic diagram of the structure of a vehicle, as shown in the embodiment of the present application. Figure 5 As shown, the vehicle may include Figure 4 The vehicle control system shown.

[0070] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0071] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A motor drive device, characterized in that, include: Axial flux motor, motor driver, on-board charger and power supply; The power supply is connected to both the motor driver and the on-board charger; wherein... The axial flux motor includes multiple stators; The AC output terminal of the motor driver is connected to the first stator among the plurality of stators; the AC output terminal of the on-board charger is connected to the second stator among the plurality of stators.

2. The apparatus according to claim 1, characterized in that, The on-board charger includes at least a converter; the device further includes: a first switching assembly; wherein... One end of the converter is connected to the power supply; the other end of the converter is connected to one end of the first switching assembly, and the other end of the first switching assembly is connected to the second stator. The converter is used to convert the DC power supplied by the power supply into AC power, and then transmit it to the second stator via the first switching assembly.

3. The apparatus according to claim 2, characterized in that, The converter includes at least a first conversion circuit and a second conversion circuit; wherein the first conversion circuit is used to determine the voltage output to the second stator; and the second conversion circuit is used to convert direct current (DC) to alternating current (AC). One end of the first conversion circuit is connected to the power supply; the other end of the first conversion circuit is connected to one end of the second conversion circuit; and the other end of the second conversion circuit is connected to one end of the first switching assembly.

4. The apparatus according to claim 2, characterized in that, The second stator includes a three-phase winding; the first switching assembly includes a first switch connected to the first phase winding of the second stator, a second switch connected to the second phase winding of the second stator, and a third switch connected to the third phase winding of the second stator.

5. The apparatus according to claim 1, characterized in that, The motor driver includes an inverter; wherein... One end of the inverter is connected to the power supply; the other end of the inverter is connected to the first stator; the inverter is used to convert the DC power provided by the power supply into AC power and then transmit it to the first stator.

6. The apparatus according to claim 5, characterized in that, The first stator includes three-phase windings; the inverter indicates a three-phase bridge circuit; wherein, One end of the three-phase bridge circuit is connected to the three-phase windings of the first stator respectively; the other end of the three-phase bridge circuit is connected to the power supply.

7. A vehicle control system, characterized in that, The system includes: a motor drive device according to any one of claims 1 to 6.

8. The system according to claim 7, characterized in that, The system further includes: a second switching assembly; wherein one end of the second switching assembly is connected to the on-board charger in the motor drive device; and the other end of the second switching assembly is connected to the vehicle's AC load.

9. The system according to claim 8, characterized in that, The motor drive device includes a first switching assembly; the first switching assembly and the second switching assembly are connected in parallel.

10. A vehicle, characterized in that, The vehicle control system includes any one of claims 7-9.

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