Permanent magnet vernier (PMV) machines have attracted more and more attentions due to their desirable features of high torque density. However, nearly all the proposed PMV machines are driven by converters. In this article, two methods including stator winding pole-changing and cascading method to acquire self-starting capability for PMV machine are analyzed and compared. The inverters can be omitted due to the self-starting capability of the novel topologies. First, the structure and circuit of pole-changing line-start permanent magnet vernier (PCLSPMV) machine are given and analyzed. Then, a dual-stator LSPMV machine, which cascades an induction machine and a PMV machine is also analyzed. Additionally, the starting and steady-state performance between pole-changing and cascading LSPMV machine. Finally, a prototype of a PCLSPMV machine has been built and tested to demonstrate the analysis and simulation.

中文翻译：

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变极与双定子线启动永磁游标机的比较

永磁游标（PMV）电机由于其高扭矩密度的理想特性而受到越来越多的关注。然而，几乎所有提议的 PMV 机器都是由转换器驱动的。本文分析比较了定子绕组变极和级联两种获得永磁电机自启动能力的方法。由于新型拓扑结构的自启动能力，可以省略逆变器。首先给出并分析了变极直线起动永磁游标(PCLSPMV)机的结构和电路。然后，还分析了串联感应电机和 PMV 电机的双定子 LSPMV 电机。此外，变极和级联 LSPMV 电机之间的启动和稳态性能。最后，