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工程科学与技术:2014,46(1):140-146
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不同充磁方式的对转永磁电机气隙磁场性能研究
(1.国网陕西省电力公司 检修公司;2.西北工业大学 自动化学院)
Research of Air-gap Magnetic Field in Contra-rotating PM Motor with Different Magnetization Manners
(1.State Gird Shaanxi Electric Power Maintenance Co.;2.School of Automation,Northwestern Polytechnical Univ.)
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投稿时间:2013-06-18    修订日期:2013-12-30
中文摘要: 针对磁钢不同充磁方式对电机磁场性能影响不同,在对比分析径向充磁、平行充磁和Halbach磁体磁化强度分布的基础上,提出一种计算内永磁体转子和外永磁体转子对转电机气隙磁密的解析算法。该算法计算结果与有限元分析结果接近且趋势相同,是一种在电机设计前期预报气隙磁场分布的有效方法。利用解析和有限元相结合的方法研究了充磁方式对2种转子结构对转永磁电机气隙磁场的影响。结果表明:外永磁体转子对转电机选择径向充磁能获得趋近方波的气隙磁密和较高的磁密峰值,适合无刷直流电机;内永磁体转子对转电机选择平行充磁既可提高气隙磁密的正弦分布程度,又能得到较高气隙峰值;Halbach磁体的电机气隙磁密正弦分布程度高,谐波含量小,适用于永磁同步电机。
Abstract:Based on the effects of magnetization of permanent magnet(PM) on the magnetic field distribution, an analytical method was presented to solve the slotted air-gap of a surface PM contra-rotating motor(CRM) with three common types of magnetization field patterns, Radial, Parallel and Halbach magnetization. This analytical method is very effective for forecasting the magnetic field distribution and in agreement with the results of finite-element simulations. According to the analysis of the differences between the fields of the machine with different magnetizations, the accurate 2D finite-element analysis model was established in both internal and external rotor CRM. The testing and simulation results showed that the external rotor CRM with radial magnetization has a greater flux density and trapezoidal wave which is suitable for brushless DC motor, and the internal rotor CRM with parallel magnetization can improve the sinusoidal waveform distribution and has a greater flux density. The air-gap flux density of Halbach magnet motor has the most sinusoidal waveform distribution which demonstrates that Halbach magnet is suitable for multi-polar PM motor.
文章编号:201300618     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目 (51177135);陕西省自然科学基金重点项目资助 (2011GZ013)
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李延升,窦满峰,骆光照.不同充磁方式的对转永磁电机气隙磁场性能研究[J].工程科学与技术,2014,46(1):140-146.
Li Yansheng,Dou Manfeng,Luo Guangzhao.Research of Air-gap Magnetic Field in Contra-rotating PM Motor with Different Magnetization Manners[J].Advanced Engineering Sciences,2014,46(1):140-146.