一种新型混合转子结构无轴承电动机磁悬浮力的矢量控制

无轴承电机具有无机械磨损和噪声等优点，其转子旋转和悬浮的电磁转矩和磁悬浮力皆由电机本身产生。在对不同转子结构转矩和磁悬浮力进行有限元对比分析的基础上，该文提出了一种兼有永磁式和感应式转子共同优点的新型混合转子结构。该电机不仅能产生大的电磁转矩和磁悬浮力，而且提供了通过电流矢量定向实现悬浮力解耦控制的途径。基于数字信号处理器DSP(TMS320C32)和复杂可编程逻辑芯片CPLD(Xilinx)，构建了混合转子无轴承电机的控制系统，实现了悬浮力矢量控制策略。试验结果表明该文所提出的新型无轴承电机的设计与控制策略是可行的。

LEVITATION FORCE VECTOR CONTROL OF A NOVEL BEARINGLESS MOTOR WITH HYBRID ROTOR STRUCTURE

Bearingless motors have the advantage of without mechanical wear and noise. The electromagnetic torque and levitation force for rotor rotation and suspension are generated by the motor itself. Based on the comparative study of toque and magnetic levitation force for a bearingless motor with different rotor structures by means of finite element analysis, this paper presents a new hybrid rotor structure, which has the advantages of both permanent magnet rotor and induction rotor. The proposed bearingless motor can not only produce larger electromagnetic torque and levitation force but also provide a way to realize decoupling control of levitation force through current vector orientation. A control system of the proposed bearingless motor with hybrid rotor structure based on DSP TMS320C32 and Xilinx CPLD has been set up. The vector control strategy of levitation force has been implemented. The tested results show that the proposed motor design and control strategy of the novel bearingless motor are feasible.