高速永磁同步电机转子涡流损耗分析  

Analysis of Rotor Eddy-current Loss in High-speed Permanent Magnet Synchronous Motors

作　　者：郭伟林 彭利明 张芳 GUO Weilin;PENG Liming;ZHANG Fang(Gree Electric Appliances,Inc.of Zhuhai,Zhuhai Guangdong 519070,China;Guangdong Provincial Key Laboratory of High-speed and Energy Conservation Motor System,Zhuhai Guangdong 519070,China)

机构地区：[1]珠海格力电器股份有限公司,广东珠海519070 [2]广东省高速节能电机系统企业重点实验室,广东珠海519070

出　　处：《微电机》2022年第11期36-41,共6页Micromotors

摘　　要：高速永磁同步电机转子涡流损耗是设计时的关键性问题之一,它会使永磁体发热,导致永磁体温度逐渐升高,严重时甚至面临退磁的风险。本文针对一台55 kW、24000 r/min高速永磁同步电机,采用有限元分析软件,研究了典型的合金材料护套、碳纤维材料护套、碳纤维加铜屏蔽层复合结构护套方案转子,其各部件涡流损耗受实际工况影响的规律。结果表明:在选择护套方案时并非带铜屏蔽层对所有工况均最优,仅在电流谐波含量较高或电频率较大等某些特定工况之下,总涡流损耗才最低。本研究依托于工程实际,对指导高速电机设计具有非常重要的应用价值。The analytical calculation of rotor eddy-current Loss is a key issue for the design of high-speed permanent magnet synchronous motors,which cause the magnet producing heat,makes its temperature rise,and even leads to the irreversible demagnetization.Taking a 55 kW,24000 r/min high-speed permanent magnet motor as an example,the effects of the loading conditions to the eddy-current loss of the alloy retaining sleeve,carbon fiber retaining sleeve and the carbon fiber with copper shielding layer retaining sleeve were studied by using the FEM method.The results show that in order to reduce the whole rotor eddy-current loss,it’s not always be better to choose the copper shielding layer retaining sleeve.Only when the harmonic component or the value of the current frequency is greater than a particular value,the whole rotor loss can be reduced significantly.The research is of great value in engineer applications for high-speed permanent magnet motors.

关 键 词：转子涡流损耗 合金材料护套 碳纤维材料护套 铜屏蔽层 电流谐波 电频率 

分 类 号：TM351[电气工程—电机] TM341TM355