The invention relates to an active short circuit method and circuit of a motor controller, a storage medium and a chip, belongs to the field of electric vehicles, and can avoid damage to power devices. The active short-circuit method of the motor controller comprises the following steps: acquiring vehicle fault information; whether ASC needs to be executed or not is determined according to the vehicle fault information; if so, acquiring the current of the motor and the state of the rotary transformer sensor; if neither the current sensor nor the rotary transformer sensor breaks down, the motor is controlled to conduct torque unloading, and the d-axis current of the motor is controlled to maintain the flux-weakening current at the moment when the vehicle breaks down; setting an initial current required for current closed-loop PWM soft switching of a motor controller based on the flux weakening current and the q-axis current of the motor when torque unloading is completed, and predicting the current of the motor under the ASC by using a preset response relation of the current of the motor under the ASC along with time; current closed-loop PWM soft switching is controlled and executed based on the initial current and the predicted current; and if the predicted current reaches the preset steady-state current, controlling to execute ASC.
本公开涉及一种电机控制器的主动短路方法和电路、存储介质和芯片,属于电动汽车领域,能够避免损坏功率器件。一种电机控制器的主动短路方法,包括:获取车辆故障信息;根据车辆故障信息确定是否需要执行ASC;若需要,获取电机的电流和旋变传感器的状态;若电流和旋变传感器均未发生故障,控制电机进行扭矩卸载并控制电机的d轴电流维持车辆故障发生时刻下的弱磁电流;基于弱磁电流和扭矩卸载完成时电机q轴电流设置对电机控制器进行电流闭环PWM软切换所需的初始电流,并利用电机在ASC下的电流随时间的预设响应关系对电机在ASC下的电流进行预测;基于初始电流和预测的电流控制执行电流闭环PWM软切换;若预测的电流达到预设的稳态电流,控制执行ASC。
Active short circuit method and circuit of motor controller, readable storage medium and chip
电机控制器的主动短路方法和电路、可读存储介质和芯片
2022-09-27
Patent
Electronic Resource
Chinese
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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