摘要
提出一种基于辅助槽削弱分数槽永磁电机空载激振力波的方法。首先推导永磁电机空载激振力波的解析表达式,得到对分数槽永磁电机振动噪声起主要作用的低阶激振力波的解析表达式。对激振力波阶数的分析表明,通过在定子齿上开辅助槽改变永磁电机极数槽数配合,可以削弱因极槽数配合引起的低阶激振力波。采用机械阻抗法得到未开辅助槽和开辅助槽时永磁电机电磁噪声声功率级频谱,利用有限元仿真计算和傅里叶分析对比开辅助槽前后激振力波的频谱,对比结果说明,所提方法可以有效削弱对分数槽永磁电机空载电磁振动和噪声起主要作用的激振力波。
This paper proposed a new method to reduce the no-load exciting force wave for permanent magnet motors with fractional slot based on teeth notching.The analytical expressions of exciting force wave were induced to obtain the main origins for the electromagnetic vibration and the noise in permanent magnet motors with a fractional number of slots per pole.The investigation indicates that changing the slot/pole number in combination with teeth notching can effectively reduce the main exciting force of the electromagnetic vibration and the noise.The sound power level（SPL） spectrums for permanent magnet motors both with and without teeth notching were derived with the approach of mechanical impendence.Results of the comparison between finite element method（FEM） and Fourier analysis proves that the presented method can significantly reduce the main exciting force wave for permanent magnet motors with fractional slot.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第18期103-108,共6页
Proceedings of the CSEE
关键词
永磁电机
激振力波
分数槽
辅助槽
削弱方法
permanent magnet motor
exciting force wave
fractional number slot
teeth notching
reduction method
