The invention provides a control method and device for a driving motor of an electric vehicle and a storage medium, and the control method comprises the steps: controlling the driving motor in a torque control mode under the normal operation condition of the vehicle; diagnosing whether the vehicle breaks down or not; if the vehicle breaks down, a fault working condition is entered, and an output current reduction control mode is adopted to control the driving motor; and when a switching trigger condition of an active short-circuit mode is reached, switching from the output current reduction control mode to the active short-circuit mode to control the driving motor. When the vehicle breaks down, the torque control mode is switched into the output current reduction control mode, and then the output current reduction control mode is switched into the active short-circuit mode when the switching trigger condition is met. The situation that a motor winding generates large transient peak current and a reverse magnetic field due to the fact that the control unit is directly switched into an active short-circuit mode is avoided, the working environment of a permanent magnet in the motor is improved, and the probability of demagnetization is reduced.
本发明提供一种电动汽车的驱动电机控制方法、控制装置及存储介质,其中控制方法包括:车辆正常运行工况中,采用转矩控制模式控制驱动电机;诊断车辆是否发生故障;若车辆发生故障,进入故障工况,采用降低输出电流控制模式控制所述驱动电机;当达到主动短路模式的切换触发条件,由所述降低输出电流控制模式切换成所述主动短路模式控制所述驱动电机。本申请在车辆发生故障时,先从转矩控制模式切入降低输出电流控制模式,然后在达到切换触发条件时,再从降低输出电流控制模式切入主动短路模式,避免了控制单元直接切入主动短路模式导致电机绕组产生较大的瞬态尖峰电流和反向磁场的情况,改善电机内部永磁体的工作环境,降低退磁发生概率。
Control method and control device for driving motor of electric vehicle and storage medium
电动汽车的驱动电机控制方法、控制装置及存储介质
18.07.2023
Patent
Elektronische Ressource
Chinesisch
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