无轴承同步磁阻电机转子位移一般需由机械式位移传感器检测获取,但安装位移传感器会带来电机结构复杂、轴向长度增大等缺陷,故需新的转子位移检测方法.分析了电机转子偏心下悬浮绕组电感和转子位移之间线性关系,通过在悬浮绕组注入高频信号,检测其感生出的差分电压,经信号处理,可提取差分电压中的转子位移信号,实现了被控电机转子位移准确观测.仿真证实,此方法检测精度较高,能实现电机的稳定悬浮运行.%The bearingless synchronous reluctance motor (BSRM) requires displacement sensors inside the motor to detect the rotor displacements,a new control method to observe the rotor displacement is needed to reduce the complex structure and a long shaft length for the BSRM.The linear relation between the suspension winding inductance and the rotor displacement was analyzed,then using high frequency signal injection in the suspension winding,then the differential voltage was detected,through signal processing,the rotor displacements were extracted from the differential voltage,the accurate observation of the rotor displacements for the BSRM was realized.Simulation results confirm that the proposed method has higher detection accuracy and can achieve stable suspension operation.
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