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磁通反向式永磁电机性能计算与转矩脉动削弱措施研究

DOI: 10.13334/j.0258-8013.pcsee.2015.11.023, PP. 2838-2846

Keywords: 磁通反向式永磁电机,子域法,解析法,有限元法,齿槽转矩,分布式绕组

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Abstract:

为提高磁通反向式永磁电机的转矩密度,提出了两种分布式绕组拓扑结构。基于子域法建立的解析模型,计算对比了采用不同绕组拓扑结构时电机的磁场和电磁性能,结果表明两种分布式绕组结构均可大幅提高电机的能量密度。分析了永磁体宽度、同一齿上永磁体间夹角和转子槽宽等电机结构参数对转矩脉动的影响,通过合理的选择结构参数,可在保持平均转矩不变的情况下,显著减小电机转矩脉动。设计制造了一台6/8极结构样机,通过有限元法和实验对解析模型进行了验证。结果表明,所提方法能够体现结构参数和电机性能之间的关系,计算速度快,特别适用于电机的初始设计和优化计算。

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