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CN-122026750-A - Method and system for controlling a plurality of on-board electrical machines, computer program product

CN122026750ACN 122026750 ACN122026750 ACN 122026750ACN-122026750-A

Abstract

An embodiment of the application provides a method for controlling a plurality of on-board motors, the method comprising continuously supplying a converted three-phase alternating voltage to a first on-board motor (1) via a three-phase bridge inverter circuit (3), and enabling/disabling the supply of the three-phase alternating voltage to a second on-board motor (2) via the three-phase bridge inverter circuit (3) based on a control signal of the second on-board motor (2), wherein the first on-board motor (1) and the second on-board motor (2) have equal peak power and peak torque. The application also provides a system for controlling a plurality of in-vehicle motors and a computer program product. According to the application, the number of the three-phase bridge inverter circuits and the number of controllers used can be effectively reduced on the premise of ensuring the normal operation of the vehicle-mounted motor, so that the software cost and the hardware cost of the vehicle-mounted motor control are effectively reduced.

Inventors

  • MENG YINGCHUN
  • JIANG YITAO

Assignees

  • 博世动力总成有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (10)

  1. 1. A method for controlling a plurality of in-vehicle motors, the method comprising: Continuously supplying the converted three-phase alternating voltage to the first vehicle-mounted motor (1) via a three-phase bridge inverter circuit (3), and -Enabling/disabling a three-phase ac voltage supply to a second vehicle-mounted motor (2) via the three-phase bridge inverter circuit (3) based on a control signal of the second vehicle-mounted motor (2), wherein the first vehicle-mounted motor (1) and the second vehicle-mounted motor (2) have equal peak power and peak torque.
  2. 2. The method according to claim 1, wherein the first and the second vehicle-mounted motor (1, 2) also have equal rated voltage, rated current, rated power, rated frequency, rated torque, rated rotational speed and/or rated power factors.
  3. 3. Method according to claim 1 or 2, wherein a second switching unit (5) is connected between the second vehicle-mounted electric machine (2) and the output of the three-phase bridge inverter circuit (3), the second switching unit (5) being controlled on the basis of a control signal of the second vehicle-mounted electric machine (2) to enable/disable a three-phase alternating voltage supply to the second vehicle-mounted electric machine (2) via the three-phase bridge inverter circuit (3).
  4. 4. A method according to any one of claims 1 to 3, wherein operating parameters of the three-phase bridge inverter circuit (3) are adjusted based on control signals of the first vehicle-mounted motor (1) such that the three-phase alternating voltage converted by the three-phase bridge inverter circuit (3) is adapted to the control tasks of the first vehicle-mounted motor (1).
  5. 5. The method according to any one of claims 1 to 4, wherein the first vehicle-mounted motor (1) is a steering motor, and/or The second vehicle-mounted motor (2) is an inflating pump motor, a vehicle-mounted radiator motor, a vehicle-mounted air conditioner pump motor and/or a vehicle-mounted high-pressure water pump motor.
  6. 6. The method according to claim 5, wherein, in case the second vehicle-mounted motor (2) is configured as an air pump motor, a control signal of the second vehicle-mounted motor (2) is generated based on a pressure in an air tank for vehicle braking, wherein, when the pressure in the air tank is smaller than a preset pressure threshold value, a first control signal is generated to enable a three-phase alternating voltage supply to the second vehicle-mounted motor (2) by the three-phase bridge inverter circuit (3), and when the pressure in the air tank is larger than or equal to a preset pressure threshold value, a second control signal is generated to disable a three-phase alternating voltage supply to the second vehicle-mounted motor (2) by the three-phase bridge inverter circuit (3).
  7. 7. The method of any one of claims 1 to 6, wherein the method further comprises: A first switching unit (4) is connected between the first vehicle-mounted motor (1) and the output of the three-phase bridge inverter circuit (3), the first switching unit (4) being controlled on the basis of a control signal of the first vehicle-mounted motor (1) to enable/disable a three-phase alternating voltage supply to the first vehicle-mounted motor (1) via the three-phase bridge inverter circuit (3).
  8. 8. A system (10) for controlling a plurality of in-vehicle electrical machines, wherein the system (10) comprises: A three-phase bridge inverter circuit (3) for converting a direct-current voltage into a three-phase alternating-current voltage by the three-phase bridge inverter circuit (3); the first vehicle-mounted motor (1) is connected with the output end of the three-phase bridge type inverter circuit (3); A second vehicle-mounted motor (2) and a second switching unit (5), wherein the second vehicle-mounted motor (2) is connected to the output of the three-phase bridge inverter circuit (3) via the second switching unit (5), wherein the first vehicle-mounted motor (1) and the second vehicle-mounted motor (2) have equal peak power and peak torque, and Control unit (6) configured for performing the method according to any one of claims 1 to 7.
  9. 9. The system (10) according to claim 8, wherein the system (10) further comprises a first switching unit (4), the first switching unit (4) being connected between the first vehicle-mounted motor (1) and an output of the three-phase bridge inverter circuit (3), wherein a three-phase ac voltage supply of the first vehicle-mounted motor (1) is switched on or off by the first switching unit (4).
  10. 10. A computer program product, such as a computer-readable program carrier, comprising computer program instructions which, when executed by a processor, at least in addition, implement the steps of the method according to any of the preceding claims 1 to 7.

Description

Method and system for controlling a plurality of on-board electrical machines, computer program product Technical Field The present application relates to the field of vehicle-mounted motor control, in particular to a method for controlling a plurality of vehicle-mounted motors, a system for controlling a plurality of vehicle-mounted motors, and a computer program product for at least assisted implementation of the steps of the method according to the present application. Background In an electric vehicle, a plurality of in-vehicle motors using an ac voltage as a driving source, such as an air pump motor for vehicle braking, a steering motor for vehicle steering, and the like, are provided, and a battery system of the electric vehicle is only capable of supplying a dc voltage. In conventional topologies for electric vehicles, a separate DC/AC controller is usually provided for each on-board motor for converting the direct voltage into a three-phase alternating voltage, and each DC/AC controller is equipped with a separate three-phase bridge inverter circuit and a separate control unit, wherein one three-phase bridge inverter circuit is required to be equipped with six controllable switching tubes and six diodes, which results in high software and hardware costs for the DC/AC controller of the on-board motor. Therefore, there is a certain room for improvement in the inverter controllers of the current on-vehicle motors. Disclosure of Invention It is an object of the present application to provide a method for controlling a plurality of in-vehicle electrical machines, a system for controlling a plurality of in-vehicle electrical machines, and a computer program product to at least partially solve the problems of the prior art. According to a first aspect of the present application, there is provided a method for controlling a plurality of in-vehicle motors, the method comprising: continuously supplying the converted three-phase alternating voltage to the first vehicle motor via a three-phase bridge inverter circuit, and -Enabling/disabling a three-phase ac voltage supply to a second vehicle-mounted motor through the three-phase bridge inverter circuit based on a control signal of the second vehicle-mounted motor, wherein the first vehicle-mounted motor and the second vehicle-mounted motor have equal peak power and peak torque. The application has the core concept that three-phase alternating voltage is supplied to a plurality of vehicle-mounted motors capable of running with equal running parameters through the same three-phase bridge type inverter circuit, and the three-phase bridge type inverter circuit shared by the plurality of vehicle-mounted motors is controlled by the same controller, so that the supply voltage control of the plurality of vehicle-mounted motors can be realized, the number of the three-phase bridge type inverter circuits and the number of controllers can be effectively reduced on the premise of ensuring the normal running of the vehicle-mounted motors, and the software cost and the hardware cost of the vehicle-mounted motor control are further effectively reduced. According to a second aspect of the present application, there is provided a system for controlling a plurality of in-vehicle motors, wherein the system may include: -a three-phase bridge inverter circuit by means of which a direct voltage is converted into a three-phase alternating voltage; -a first vehicle-mounted motor connected to an output of the three-phase bridge inverter circuit; -a second vehicle-mounted motor and a second switching unit, the second vehicle-mounted motor being connected to the output of the three-phase bridge inverter circuit via a second switching unit, wherein the first vehicle-mounted motor and the second vehicle-mounted motor have equal peak power and peak torque, and -A control unit configured for performing the method according to the application. According to a third aspect of the application, a computer program product, e.g. a computer-readable program carrier, is provided, comprising computer program instructions which, when executed by a processor, at least in addition, carry out the steps of the method according to the application. Drawings The principles, features and advantages of the present application may be better understood by describing the present application in more detail with reference to the drawings. The drawings include: FIG. 1 illustrates a schematic circuit diagram of a system for controlling a plurality of in-vehicle motors according to an exemplary embodiment of the present application; Fig. 2 shows a schematic circuit diagram of a system for controlling a plurality of in-vehicle motors according to another exemplary embodiment of the present application; FIG. 3 shows a flowchart of a method for controlling a plurality of in-vehicle motors according to an exemplary embodiment of the application, and Fig. 4 shows a flowchart of a method for controlling a plurality of in-ve