基于电流阈值的开关磁阻电机位置估计容错分析

在基于双电流阈值的位置估计基础上,提出了一种考虑电流传感器故障和估计误差补偿的位置估计容错技术。通过双电流阈值与脉冲电流峰值比较估计位置检索脉冲信号,利用开关磁阻电机相与相之间的独立性,利用正常相的电磁信息间接估计传感器故障相的转子位置信号。通过仿真计算得到转速对位置估计误差的影响,并提出了位置误差补偿措施。在一台12/8结构样机中进行了相关试验,试验结果表明,所提方法提高了无位置传感器技术的容错性,验证了该算法的正确性和可行性。

Fault Tolerant Analysis of Sensorless for Switched Reluctance MotorBased on the Current Threshold

A position estimation fault tolerant technology for switched reluctance motor (SRM) was proposed under the condition of the sensor fault and estimation error compensation based on the double current thresholds. In this method, the position index pulses were estimated by comparing the double current threshold value and the pulse current amplitude, and the speed and position could also be estimated by the position index pulses signals. Uing the independence of the SRM between the phase and the phase, the positions of the sensor fault phase were estimated using the electromagnetic information of the normal phase. The influence of the speed on position estimation error was obtained by simulation, and put forward the position error compensation measures. The experiment was carried out in a 12/8 structure prototype, the experimental results showed that the method could improve the fault tolerance of the sensorless sensor technology, and verify the correctness and feasibility of the algorithm.