无需转子位置角悬浮的双绕组无轴承磁通切换永磁电机驱动研究

Research on a Drive Control System of Double-winding Bearingless Flux-switching Permanent Magnetic Motor Without Rotor Position Angle in Suspension Control

定子永磁型磁通切换电机具有永磁体散热容易、转子结构简单等优点。在传统的三相功率绕组的12/10磁通切换永磁电机拓扑基础上,基于空间对称线圈流过电流对空间对称气隙磁场进行相反方向调制的思路构建三相悬浮绕组。两套绕组均采用三相逆变桥供电,各相悬浮绕组正方向电流产生的悬浮力在空间近似互差120?,从而三相悬浮力合成出实现转子需要的悬浮力;功率绕组采用矢量控制算法实现转子切向旋转控制。理论分析及实验结果表明,电机稳态及动态运行中转子均能稳定悬浮于中心附近,最大控制误差小于?0.1mm;电机切向旋转运行对转子稳定悬浮控制影响较小。

The flux-switching motor with permanent magnet on stator has some advantages such as easy heat radiation, simple rotor structure and so on. A three-phase suspension winding was constructed on the topology of classic 12/10 flux-switching permanent magnet motor with three-phase power winding according to the idea that the space symmetrical air-gap magnetic fields can be modulated in opposite direction with space symmetrical coils. The two sets of winding were supplied by three-phase inverters respectively. The three-phase suspension forces, produced by positive current passing through the three-phase winding respectively, were spaced by 120 degrees, and thus the demanded suspension force is synthesized by the three-phase suspension force. The rotation of rotor was controlled by power winding with vector control. The results of theory analysis and experiments show that the rotor can be suspended around the center with maximum control error ？0.1 mm, and the effect on the rotor suspension control by the rotation control in tangential direction is low.