关键词: 无轴承磁通切换电机(BFSPMM), 六相电机, 容错控制, 缺两相, 中性点

Abstract: A method to control the torque and levitation force of a six-phase bearingless flux switching motor (BFSPMM) without two phases was presented. Since there are only five degrees of freedom that can be controlled independently in the case of six-phase motor without extracting the center point, there is no enough freedom degrees simultaneously control the torque plane and levitation plane in the case of two-phase open. A control topology for extracting the neutral point of the motor was proposed. Based on the control topology, the fault-tolerant control strategy was derived. By controlling neutral point to balance the torque current and suspension current with two phases open, the stable control of torque and suspension of the motor were realized. Simulation was used to verify the feasibility of the method.

Key words: bearingless flux-switching permanent magnet motor(BFSPMM), six-phase motor, fault-tolerant control, two phases open, neutral point