Direct-current low-voltage self-power supply device of driving system of driving motor for electric automobile
A technology of DC low-voltage power supply and driving motor, which is applied in electric vehicles, circuit devices, electric traction, etc., and can solve problems such as potential safety hazards of electric vehicles
Inactive Publication Date: 2010-10-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0003] The main technical problem to be solved by the present invention is a DC low-voltage self-power supply device for the drive motor drive syste
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[0008] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0009] The DC low-voltage self-power supply device of the electric vehicle drive motor drive system of the present invention is mainly composed of a controller DC / DC converter 5, a vehicle-mounted DC low-voltage power supply detection device 9, a control circuit 7, etc., and the controller DC / DC converter 5 will drive the motor. The DC high-voltage power supply 4 of the drive circuit 7 is converted into the available DC low-voltage power supply of the control circuit 7. The function of the vehicle-mounted DC low-voltage power supply detection device 9 is to detect whether the vehicle-mounted DC low-voltage power supply 10 is working normally. The function of the control circuit 7 is to control the driving motor 1. state.
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The invention provides a design method of a direct-current low-voltage self-power supply device of a driving system of a driving motor for an electric automobile, belonging to the application field of the electric automobiles. The direct-current low-voltage self-power supply device of the driving system of the driving motor for the electric automobile comprises a controller DC/DC converter, a vehicle-mounted direct-current low-voltage power supply detecting device, a control circuit and the like. The controller DC/DC converter is used for converting a direct-current high-voltage power supply of a driving circuit of the driving motor into a direct-current low-voltage power supply available for the control circuit; the vehicle-mounted direct-current low-voltage power supply detecting device is used for detecting whether a vehicle-mounted direct-current low-voltage power supply normally works or not; and the control circuit is used for controlling the state of the driving motor. When the vehicle-mounted direct-current low-voltage power supply is in fault, the controller DC/DC converter supplies the direct-current low-voltage power for the control circuit of the motor, and meanwhile, the vehicle-mounted direct-current low-voltage power supply detecting device sends out an early warning notice to the control circuit of the motor when detecting that the vehicle-mounted direct-current low-voltage power supply is in fault, thereby the control circuit controls the motor to stop.
Description
technical field [0001] The invention relates to the application field of electric vehicles, in particular to the field of electric vehicle drive motor drive systems. Background technique [0002] The main function of the DC low-voltage power supply for the drive motor drive system is to provide DC low-voltage power supply for the drive system control circuit. The existing DC low-voltage power supply for the drive motor drive system mainly uses a vehicle-mounted DC low-voltage power supply, which simultaneously provides electric energy for instruments, lighting, control systems and body accessories. At present, the technology of the motor drive system and the vehicle-mounted DC low-voltage power supply system has basically matured. The biggest problem is the potential safety hazard of electric vehicles when the vehicle-mounted DC low-voltage power supply fails. The control circuit of the drive motor fails, the drive circuit still works, and the drive motor is out of control....
Claims
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Inventor 张承宁董玉刚孙逢春武小花
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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