In this article, the 12-phase switched flux permanent magnet (PM) (SFPM) machine and three surface-mounted PM (SPM) machines designed for direct-drive wind power generation are comparatively analyzed. First, feasible stator-slot/rotor-pole combinations for symmetrical 12-phase winding layout are investigated for both machine topologies. Second, the key design parameters of the PM generators including the split ratio and stator teeth width ratio are optimized by finite element analysis to achieve a high phase fundamental EMF per turn and a low cogging torque, both of which are desired by the direct-drive wind power generator. Third, electromagnetic performances including air-gap field, cogging torque, static torque, inductance, output voltage and its regulation factor, output power, and efficiency of the generators are compared. A 10-kW 24-slot/22-pole SFPM prototype is built and tested to validate the FE predicted results.

中文翻译：

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直接驱动风力发电的 12 相开关磁通与表面安装式永磁电机的电磁性能比较

在本文中，比较分析了专为直驱风力发电设计的 12 相开关磁通永磁 (PM) (SFPM) 电机和三个表面贴装永磁 (SPM) 电机。首先，研究了两种机器拓扑结构的对称 12 相绕组布局的可行定子-槽/转子-磁极组合。其次，通过有限元分析优化永磁发电机的分流比和定子齿宽比等关键设计参数，以实现每匝高相位基波电动势和低齿槽转矩，这都是直驱电机所需要的。风力发电机。第三，比较了发电机的气隙场、齿槽转矩、静转矩、电感、输出电压及其调节因子、输出功率、效率等电磁性能。