The invention provides a circuit protection control method and system for a motor controller. The method comprises the following steps: calibrating a first braking torque-rotating speed curve and a second braking torque-rotating speed curve for a motor in ASC and SPO states; calibrating a safe torque curve, enabling the safe torque curve and the first braking torque-rotating speed curve to be intersected at a first intersection point, and the first braking torque-rotating speed curve and the second braking torque-rotating speed curve to be intersected at a second intersection point; determining a first rotating speed threshold value and a second rotating speed threshold value; detecting the current rotating speed of the motor, and when the current rotating speed is smaller than or equal to a first rotating speed threshold value, executing SPO protection; when the current rotating speed is larger than the first rotating speed threshold value and smaller than the second rotating speed threshold value, executing ASC or SPO alternative protection; and when the current rotating speed is larger than or equal to the second rotating speed threshold value, executing ASC protection. After the technical scheme is adopted, the method is suitable for active safety control of various pure electric/hybrid vehicle type motor controllers, and flexible control logic corresponding to various use conditions is provided.
本发明提供了一种电机控制器的电路保护控制方法及系统,包括以下步骤:对电机在ASC和SPO状态标定第一制动转矩‑转速曲线和第二制动转矩‑转速曲线;标定安全转矩曲线,安全转矩曲线与第一制动转矩‑转速曲线相交于第一交点,第一制动转矩‑转速曲线和第二制动转矩‑转速曲线相交于第二交点;确定第一转速阈值和第二转速阈值;检测电机的当前转速,当当前转速小于或等于第一转速阈值时,执行SPO保护;当当前转速大于第一转速阈值且小于第二转速阈值时,执行ASC或SPO择一保护;当当前转速大于或等于第二转速阈值时,执行ASC保护。采用上述技术方案后,适用于各类纯电动/混动车型电机控制器的主动安全控制,提供应对于各类使用工况的灵活控制逻辑。
Circuit protection control method and system of motor controller
一种电机控制器的电路保护控制方法及系统
2021-05-11
Patent
Electronic Resource
Chinese
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