Arc permanent magnet (PM) motors show good prospects in large telescope application. To explore an appropriate arc PM motor (APMM) used in the large telescope drive, this article investigates a variable flux APMM (VFAPMM) with dual-PM excitation (DPM-VFAPMM). The DPM-VFAPMM incorporates the merits of the APMM, the hybrid excited motor, and the DPM excited motor. The motor structure and working principle of the DPM-VFAPMM are described. Then, a special winding cross-connection method is adopted to mitigate the torque ripple caused by the end effect. Finally, the electromagnetic performances of the DPM-VFAPMM, the rotor-PM VFAPMM, the stator-PM VFAPMM, and the surface-mounted-PM VFAPMM are investigated and compared. The comparison results show that compared with the other three motors, the DPM-VFAPMM shows the highest flux linkage, the highest back electromotive force, the highest average torque, the highest efficiency, and the second lowest torque ripple. Simultaneously, the DPM-VFAPMM shows high torque/effective PM usage. The advantages of high average torque and low torque ripple show that the DPM-VFAPMM is suitable for the potential application of the large telescope drive.

中文翻译：

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多种励磁可变磁通电弧永磁电动机的设计与分析

弧形永磁（PM）电动机在大型望远镜应用中显示出良好的前景。为了探索在大型望远镜驱动器中使用的合适的电弧PM电动机（APMM），本文研究了具有双PM励磁（DPM-VFAPMM）的可变磁通量APMM（VFAPMM）。DPM-VFAPMM结合了APMM，混合励磁电机和DPM励磁电机的优点。描述了DPM-VFAPMM的电机结构和工作原理。然后，采用特殊的绕组交叉连接方法来减轻由末端效应引起的转矩波动。最后，对DPM-VFAPMM，转子-PM VFAPMM，定子-PM VFAPMM和表面安装式PM VFAPMM的电磁性能进行了研究和比较。比较结果表明，与其他三个电机相比，DPM-VFAPMM显示出最高的磁链，最高的反电动势，最高的平均转矩，最高的效率和第二最低的转矩脉动。同时，DPM-VFAPMM显示高扭矩/有效PM使用。高平均转矩和低转矩波动的优势表明，DPM-VFAPMM适合大型望远镜驱动的潜在应用。