基于特殊位置检测的开关磁阻电机无位置传感器控制策略

针对开关磁阻电机调速系统(SRD),提出了一种基于特殊位置检测的开关磁阻电机(SRM)转子位置估算方法。通过在线计算每相绕组实时磁链数据,检测出各相转子到达特殊位置的时刻。提出了基于特殊位置检测的电机转子位置重构策略,对电机瞬时转子位置进行还原。在提出的转子位置估算方法基础上,设计了SRD转速闭环控制系统。样机试验表明,提出的转子位置估算策略具有较高的检测精度与较宽的转速使用范围。基于关键位置检测的转速闭环无位置传感器控制策略具有较快的动态响应和较强的鲁棒性。

Sensorless Control Strategy for Switched Reluctance Drives Based onKey Position Estimation

An improved sensorless control strategy was proposed for switched reluctance drive (SRD). By calculating the fluxlinkage of each phase, key rotor positions were captured. According to observed key rotor positions, the rotor position was reconstructed by the proposed algorithm. Accordingly, a closedloop rotor speed control strategy was designed for the sensorless control. Experimental results showed that the proposed rotor position estimation algorithm achieved high accuracy and could be used for wide rotor speed range. The senseless closedloop control strategy achieved fast dynamic response and good robusteness.