The invention discloses an electric vehicle permanent magnet synchronous motor torque control method combining calibration table look-up with voltage control closed-loop compensation flux-weakening current. The method comprises the steps: reducing the given Q-axis current through a D-axis current compensation value outputted by a voltage loop so as to guarantee that the output torque remains unchanged under the condition that the voltage loop works. According to the method, the torque control precision can be improved, the control stability of the permanent magnet synchronous motor of the electric vehicle is ensured, and information of flux weakening control, maximum torque-to-current ratio control and maximum torque-to-voltage ratio control is already contained in the calibration look-uptable so that the method is a high-efficiency control method.
本发明公开了一种标定查表结合电压控制闭环补偿弱磁电流的电动车永磁同步电机转矩控制方法,同时通过电压环输出的D轴电流补偿值对Q轴电流给定进行缩小,以保证在电压环起作用的情况下,输出转矩保持不变;本专利方法可以提高转矩控制的精度,保证电动车永磁同步电机的控制稳定性,并且在标定查表中已经包含了弱磁控制、最大转矩电流比控制和最大转矩电压比控制的信息,因此是一种高效率的控制方法。
Electric vehicle permanent magnet synchronous motor torque control method
一种电动车永磁同步电机转矩控制方法
2020-04-17
Patent
Elektronische Ressource
Chinesisch
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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