Test method and device for motor active short-circuit relay, and storage medium

A technology of active short circuit and test method, applied in the automotive field to achieve the effect of ensuring reliability

CN109406997AActive Publication Date: 2019-03-01BEIJING ELECTRIC VEHICLE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-03-01
Patent Text Reader

Abstract

The invention provides a test method and device for a motor active short-circuit relay, and a storage medium. The method includes the steps: performing the zero speed detection of a motor after a motor controller completes a low-voltage power-on operation, wherein when the motor controller is powered down, a first relay and a second relay are both switched on; controlling the second relay to be turned on if the motor passes the zero speed detection, and injecting a first excitation signal at the control ends of a first phase winding and a third phase winding through the motor controller; performing injection detection of the first excitation signal to determine whether the first excitation signal is successfully injected or not; controlling the first relay to be turned on if the first excitation signal is successfully injected, and obtaining a voltage across two ends of the first relay; and judging whether the power-on test of the first relay is successful or not according to the voltage across two ends of the first relay. The method can realize the turn-on test of the short-circuit relay, and ensures the reliability of the active short-circuit function of the vehicle motor duringdriving.
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Description

Technical field

[0001] The invention relates to the technical field of automobiles, and in particular to a test method and device for an active short circuit relay of a motor, and a computer readable storage medium. Background technique

[0002] With the increasingly serious energy and environmental issues, the development of energy-saving and new energy vehicles is the future development trend. In pure electric vehicles, the electric motor drives the wheels to provide power for the driving of the vehicle. At present, permanent magnet synchronous motors (PMSM) are widely used as the motors of pure electric vehicles.

[0003] For pure electric vehicles equipped with permanent magnet synchronous motors, after serious overspeeding, serious overtemperature of the drive system, and out-of-control torque failures that endanger driving safety, a recoil electromotive force or impulse current may be generated in the motor controller and power battery. And the parts connected to the DC high...

Examples

Embodiment Construction

[0031] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0032] The following describes the testing method and device for the motor active short circuit relay and the computer-readable storage medium of the embodiments of the present invention with reference to the accompanying drawings.

[0033] In the present invention, for a pure electric vehicle equipped with a permanent magnet synchronous motor, the motor controller receives the torque command, executes a certain control strategy according to the motor state, and obtains the D and Q axis current comman...