针对磁悬浮无刷直流电机(BBLDCM)这一非线性、强耦合系统,为解决悬浮系统控制难度大、转子抖动严重等问题,设计了一种新型的直接悬浮力控制策略。借鉴传统的无刷直流电机直接转矩的控制思想,依据BBLDCM运行特点,推导出不同状态下的悬浮力矢量,并给出了悬浮绕组导通表,同时阐明了新型直接悬浮力工作过程。最后通过Simulink对所提控制策略进行仿真验证,结果表明该方法不仅能够实现转子稳定悬浮,而且有效削弱了悬浮转子的抖动,简化了悬浮控制系统,提高了悬浮系统的控制精度。

The bearingless brushless DC motor (BBLDCM) was a strongcoupled nonlinear system. To solve the problems of suspension system precise control and rotor jitter, a novel direct suspension force control strategy was proposed. With the reference of direct torque control of traditional brushless DC motor and the operating characteristics of the BBLDCM, the suspension force vector under different conditions was derived, the suspension winding conduction table was given, and the working process of the novel direct suspension force was clarified. Finally, the suspension control system was designed and simulated by Simulink. The simulation results showed that the rotor could be suspended stably, and the rotor jitter was weakened effectively. In addition, this method improved the control accuracy of the suspension system.

TM 33

国家自然科学基金项目(51707082)； 江苏省自然科学基金项目(BK20170546)；中国博士后科学基金项目(2017M620192)