Torque characteristics of dual stator permanent magnet vernier machine with different pole/slot combinations

2015 IEEE Magnetics Conference (INTERMAG) Pub Date : 2015-05-11 DOI:10.1109/INTMAG.2015.7157109

Y. Zhang, H. Lin, S. Fang, D. Wang, H. Yang

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Abstract

Traditional direct-drive permanent magnet synchronous machine (PMSM) suffers from large bulk and complex topology structure, which extremely limits its industrial applications. As a novel embranchment of PMSM, PM vernier machine (PMVM) incorporates the magnetic gear effects into conventional PMSM producing high torque at a relatively low speed, which is desirable for direct-drive applications. Recently, the specific magnetic field modulation effect and high output torque ability have been subtly incorporated into PMVM, which simultaneously enables the sinusoidal back-EMF waveform, high power density, efficient thermal dissipation. However, the torque characteristics of PMVMs with different pole-slot combinations and gear ratios have not been studied systemically as yet. In this paper, two representative dual stator PMVMs are designed to analyze the torque characteristics in detail with particular emphasis on the dominant influence of pole-slot combinations. In addition, gear ratio selecting is also investigated through the analysis of the electromagnetic characteristics of the designed PMVMs, which provides further unique insights into the design and optimization of PMVMs.

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双定子永磁游标机不同极槽组合的转矩特性

传统的直驱永磁同步电机体积大、拓扑结构复杂，极大地限制了其工业应用。作为永磁同步电机的一个新分支，永磁游标电机(PMVM)将磁性齿轮效应整合到传统的永磁同步电机中，在相对较低的速度下产生高转矩，这是直接驱动应用所需要的。近年来，在PMVM中巧妙地加入了特定磁场调制效应和高输出转矩能力，同时实现了正弦反电动势波形、高功率密度、高效散热。然而，不同极槽组合和传动比的永磁同步电机转矩特性尚未得到系统的研究。本文设计了两个具有代表性的双定子pmvm，详细分析了其转矩特性，重点研究了极槽组合的主导影响。此外，通过分析所设计的永磁同步电机的电磁特性，对其传动比选择进行了研究，为永磁同步电机的设计和优化提供了独特的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE Magnetics Conference (INTERMAG)

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