无轴承同步磁阻电机转子径向位移自检测技术

Self- Sensing of Rotor Radial Displacement for Bearingless Synchronous Reluctance Motor

为确保无轴承同步磁阻电机(BSRM)稳定运行,需要对转子位置进行实时控制,则需使用相关传感器(如电涡流传感器)检测转子径向的偏心位移信号。为降低无轴承同步磁阻电机控制系统的成本,缩减电机的长度与体积,可以移除位移传感器。提出了一种基于电感矩阵模型的无轴承同步磁阻电机无位移传感自检测技术。通过建立与分析精确模型,设计出无轴承同步磁阻电机的转子位移观测器,并基于MATLAB/Simulink仿真软件构建电机转子径向位移自检测控制系统,对所提出的理论进行仿真实验研究。仿真试验结果表明:该方法能准确有效地预测转子的偏心位移。

In order to ensure the stable operation of bearingless synchronous reluctance motor( BSRM),it is necessary to control the rotor position. Then the relevant sensors( eddy current sensor) should be used to detect the eccentricity of the rotor displacement. To reduce the total cost of BSRM and decrease the length and volume of the motor,the rotor displacement sensor can be canceled. In this paper,a model based on the inductance matrix of BSRM was deduced. Then,a displacement self- detection method for BSRM was proposed. Through the establishment and analysis of the accurate model,the rotor displacement observer was designed. And based on MATLAB / Simulink software,the BSRM control system was built to verify the proposed theory. Simulation results demonstrate that this method can effectively predict the eccentricity of the rotor accurately.