矿用潜水泵高功率密度永磁同步电机极槽配合选择分析  

Pole-slot match for high power density permanent magnet synchronous motor of mine submersible pump

作　　者：郝雪弟[1] 李宇航 周国昊 唐兵[1] HAO Xue-di;LI Yu-hang;ZHOU Guo-hao;TANG Bing(College of Mechanical and Electrical Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《煤炭工程》2021年第2期170-174,共5页Coal Engineering

基　　金：国家重点研发计划专项(2018YFC0810500)。

摘　　要：永磁同步电机的极槽配合是影响电机齿槽特性和电磁特性的重要因素之一,而齿槽转矩和反电势谐波会产生振动和噪声,严重时会提高电机温升。为了保障矿用潜水泵进行煤矿水害应急救援时设备运行的安全性和稳定性,以132kW永磁同步电机为对象,重点研究了削弱齿槽转矩和含有较少反电势谐波的极槽配合选择原则,首先分析了齿槽转矩的产生机理,并推导了齿槽转矩的解析表达式,分析极槽配合对齿槽转矩的影响,提出削弱齿槽转矩的极槽配合选择原则;然后提出了三种常用极槽配合方案,分别建立永磁同步电机的有限元仿真模型,分析得出反电势中的谐波分量和幅值,得出谐波含量最少、反电势波形更趋近于正弦波的极槽配合方案;最后仿真三种方案的齿槽转矩,验证之前提出削弱齿槽转矩选择原则的正确性。综合以上两种结果,分析对比得出矿用潜水泵高功率永磁同步电机极槽配合的方案。The pole-slot match of PMSM is one of the important factors that affect the cogging torque and electromagnetic characteristics of the motor. The cogging torque and back EMF harmonic will cause vibration and noise,which will increase the temperature rise of motor seriously. In order to ensure the safety and stability of mine submersible pump in emergency rescue of mine water disaster,we take 132 kW permanent magnet synchronous motor as the object,and focus on the selection principle of pole-slot match with less cogging torque and less back EMF harmonics. Firstly,the generation mechanism of cogging torque is analyzed,and the analytical expression of cogging torque is derived. The influence of pole-slot match on cogging torque is analyzed,and the principle of pole-slot match selection to reduce cogging torque is proposed;then three kinds of common pole slot matching schemes are put forward,and the finite element simulation models of PMSM are established. The harmonic component and amplitude in the back EMF are analyzed,and the pole slot matching scheme with the least harmonic content and the back EMF waveform more close to the sine wave is obtained;finally,three schemes of cogging torque are simulated to verify the correctness of the principle of reducing cogging torque. Based on the above two results,the pole-slot match scheme of highpower permanent magnet synchronous motor for mine submersible pump is obtained.

关 键 词：永磁同步电机 极槽配合 有限元 反电势 齿槽转矩 

分 类 号：TD744[矿业工程—矿井通风与安全]