In the traditional bearingless permanent magnet slice motor (BPMSM), radial displacement’s closed loop control was used to realize indirectly the stable control of suspension force. If the motor’s rotor is subjected to radial interferences, the accuracy of suspension force control and its dynamic performance are restricted. Besides, the phase information needed for suspension force control relies on accurate measurement of rotor position to make the control system be more complex. In order to solve the problems mentioned above, here the relationship between suspension force changes and flux linkage changes of suspension force winding in a BPMSM was deduced. Then the double-closed loop compensation control strategy for radial suspension force and radial displacement was proposed. The flux linkage of torque winding was identified based on the voltage-current model to improve greatly the motor control flexibility. The simulation and test results showed that the proposed suspension force control method can improve the control accuracy and dynamic performance of suspension force; the control system has a strong anti-disturbance ability, good static and dynamic performances.
朱熀秋， 赵玉亮， 胡亚民， 祝苏明. 动态扰动下无轴承永磁薄片电机的悬浮力补偿策略[J]. 振动与冲击, 2017, 36(23): 99-105.
ZHU Huangqiu ZHAO Yuliang HU Yamin ZHU Suming. Compensation strategy of suspension force for a bearingless permanent magnet slice motor under dynamic disturbances. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(23): 99-105.
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