The invention provides a driving motor rotation state monitoring method and system for an electric automobile. The method comprises the following steps of acquiring a rotating position of a driving motor and a current phase change signal on a high-voltage three-phase alternating current line of the driving motor; outputting the rotation position in the form of an analog signal, and outputting a current phase change signal in the form of a digital signal; decoding and converting the analog signal into rotating speed data F of a driving motor, and calculating a digital signal to obtain a to-be-driven rotating speed f of the driving motor; calculating the rotating speed data F and the to-be-driven rotating speed f according to a formula delta F=|F-f| to obtain a rotating speed difference value delta F; and comparing the rotating speed difference value delta F with a preset rotating speed value F0, and if F is greater than or equal to F0, outputting a high-voltage three-phase alternating current with a preset current value to the driving motor so that the driving motor operates at a rotating speed corresponding to the preset current value. The method is advantaged in that the out-of-control fault of the motor rotating speed can be comprehensively, effectively and timely identified, and safe driving of the electric automobile is ensured.
本发明提供了一种用于电动汽车的驱动电机旋转状态监控方法及系统。该方法包括:获取驱动电机的旋转位置和驱动电机的高压三相交流线上的电流相位变化信号;将旋转位置以模拟信号形式输出,且将电流相位变化信号以数字信号输出;将模拟信号解码转换成驱动电机的转速数据F,且对数字信号进行计算获得驱动电机的欲驱动转速f;对转速数据F和欲驱动转速f按照公式△F=∣F‑f∣进行计算,获得转速差值△F;将转速差值△F与一预设转速值F进行比较,若△F≥F,则向驱动电机输出一预设电流值的高压三相交流电,使驱动电机在预设电流值对应的转速下运行。本发明方法以及系统可全面、有效且及时地对电机转速失控故障进行识别,确保电动汽车的安全行车。
Driving motor rotation state monitoring method and system for electric automobile
一种用于电动汽车的驱动电机旋转状态监控方法及系统
2020-07-14
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
Motor controller, electric driving system and electric automobile
European Patent Office | 2024
|