磁链模型的双开关磁阻电机无位置传感器控制

Sensorless control of double switched reluctance motor based on flux model

针对开关磁阻电机(SRM)转子位置传感器带来的成本提高、可靠性降低的问题,研究双SRM无传感器控制。利用SRM两个特殊位置的磁链特性,建立非线性磁链解析模型,给出磁链模型中的参数计算方法,提出双开关磁阻电机无位置传感器控制策略。以TMS320F2812 DSP为控制核心,搭建两台18.5 kW SRM控制器,并实现双机无传感器同步运行。实验结果表明,该控制策略下电机静止启动无反转或抖振,相切换可靠、主从机转矩输出功率平衡、转子位置估计误差小于2°,系统具有良好的动态和静态性能,为双电机无传感器控制提供了一种易于实现的方案。

Double switched reluctance motor（SRM） sensorless control is presented for the purpose of eliminating position sensor.According to two special locations flux characteristics of SRM,analytical flux model was established and parameter calculation method was given.Furthermore,sensorless control strategy of double switched reluctance motor was proposed.Two 18.5kW SRM controllers were set up using TMS320F2812 DSP as control core.Double SRM sensorless experimental results show that there is no reversal or chattering in starting period,and switching between phases is reliable.Torque outputs of two SRM are power balanced,and rotor position estimation error is less than 2°.The system has good dynamic and static performance.The proposed method is helpful for double SRM sensorless control.