制冷离心机用高速永磁电动机转子强度设计

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英文篇名：Rotor Strength Design of High-Speed Permanent Magnet Motor for Refrigeration Centrifuge 作者：张小波 ; 贾金信 ; 张芳 英文作者：ZHANG Xiao-bo;JIA Jin-xin;ZHANG Fang;State Key Laboratory of Air-Conditioning Equipment and System Energy Conservation;Gree Electric Appliances Inc.of Zhuhai; 关键词：高速永磁电动机 ; 过盈配合 ; 合金护套 ; 强度分析 ; 超速试验 英文关键词：high-speed permanent magnet motor;;interference fit;;alloy sleeve;;strength analysis;;over-speed test 中文刊名：WTDJ 英文刊名：Small & Special Electrical Machines 机构：空调设备及系统运行节能国家重点实验室;珠海格力电器股份有限公司; 出版日期：2019-06-25 12:02 出版单位：微特电机 年：2019 期：v.47;No.341 语种：中文; 页：WTDJ201906009 页数：5 CN：06 ISSN：31-1428/TM 分类号：42-46

摘要

针对离心机用高速永磁电动机转子强度分析问题,基于弹塑性力学理论,推导了高速转子强度设计的解析表达式,给出明确的应力评判准则;同时在过盈量计算过程中,考虑温度因素影响,研究一套有效的高速转子过盈量计算和护套最小厚度计算方法。以一台额定转速40 000 r/min的永磁同步电机为分析对象,采用解析法和有限元法分别计算了合金护套、永磁体的径向应力、切向应力和等效应力,两种方法的计算结果最大偏差在2%以内,满足工程应用要求。超速试验结果表明,根据该方法设计的高速永磁转子具有足够的机械强度。
        According to the analysis of rotor strength of high-speed permanent magnet motor for centrifuge,based on the theory of elastoplastic mechanics,the analytical expression of high-speed rotor strength design was derived,and the explicit stress evaluation criteria were given. In the process of calculating the interference,considering the influence of temperature factors,an effective calculation of the high-speed rotor interference and the minimum thickness calculation method of the sleeve were studied. The permanent magnet synchronous motor with rated speed of 40 000 r/min was used to calculate the radial stress,tangential stress and equivalent stress of the alloy sleeve and permanent magnet by the analytical algorithm and finite element method. The calculation of two methods was carried out and the maximum deviation of the results was less than 2%,which is suitable for engineering applications. The results of the over-speed test show that the high-speed permanent magnet rotor designed according to the proposed method has sufficient mechanical strength.

引文

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