车用驱动电机无电流传感器控制

针对传统电机矢量控制方法应用于车用驱动电机时,高效工作区窄、反馈闭环控制导致过流现象等问题,提出一种无电流传感器电机控制方法。该方法根据指令转矩和电机转速,直接控制电压空间矢量的幅值和相位,实现对电机转矩和转速的控制。该方法突破了传统矢量控制对电流传感器的依赖,克服了闭环控制导致过流的缺陷,规避了传统矢量控制在电流传感器故障情况下电机无法控制的问题,省去了电流传感器的成本。仿真实验和电机台架试验结果表明,该方法不仅能够扩大电机高效工作区,而且提高了电机控制系统的可靠性。

Vehicle drive motor current-sensorless control method

A current-sensorless control method was proposed to apply in the vehicle drive motor to alleviate the shortecomings of the traditional vector control(narrow efficient work area)and the feedback loop control(being liable to over current). This method directly controls the magnitude and phase angle of the voltage vector according to the command motor torque and speed to realize the control of the real torque and speed of the motor. The proposed method saves the cost of the current sensor, avoids the dependence on the current sensor, the possible over current of the close loop control, and being unable to control under the condition of the current sensor malfunction. The simulation and bench test results show that the proposed method can not only increase the efficient work area, but also improve the reliability of the motor control system.