高速内置式永磁转子强度分析与设计

发布时间：2019-06-12 06:45

【摘要】：针对高速内置式永磁转子表面线速度高,高速离心力易损坏隔磁桥的问题,对高速内置式永磁转子进行强度分析与设计。基于转子受力原理,推导高速内置式永磁转子强度解析计算公式,并采用有限元法验证了解析计算的正确性。为了提高高速内置式永磁转子的机械可靠性,提出采用永磁体分段的转子结构,即在转子结构中增加加强筋以分散隔磁桥所受的离心力,针对分段转子结构复杂的特点,采用有限元法分析了加强筋个数、加强筋尺寸对转子强度与漏磁特性的影响,总结了分段结构转子的设计规律。在对高速内置式永磁转子强度与电磁特性分析的基础上,设计一台额定功率15 k W、最高转速30 000 r/min的高速电机内置式永磁转子并进行了空载试验,为高速内置式永磁转子的设计提供了参考。
[Abstract]:In order to solve the problem that the surface linear speed of high speed built-in permanent magnet rotor is high and the high speed centrifugal force is easy to damage the magnetic isolation bridge, the strength analysis and design of high speed built-in permanent magnet rotor are carried out. Based on the principle of rotor force, the analytical calculation formula of high speed built-in permanent magnet rotor strength is derived, and the correctness of the analytical calculation is verified by finite element method. In order to improve the mechanical reliability of high speed built-in permanent magnet rotor, a permanent magnet segmented rotor structure is proposed, that is, the centrifugal force of magnetic isolation bridge is dispersed by adding reinforcement into the rotor structure. According to the complex structure of the segmented rotor, the influence of the number of reinforcement bars and the size of reinforcement on the strength and magnetic flux leakage characteristics of the rotor is analyzed by finite element method, and the design law of the segmented structure rotor is summarized. Based on the analysis of strength and electromagnetic characteristics of high speed built-in permanent magnet rotor, a high speed motor built-in permanent magnet rotor with rated power of 15 kW and maximum speed of 30 000 r/min is designed and tested without load, which provides a reference for the design of high speed built-in permanent magnet rotor.
【作者单位】：沈阳工业大学国家稀土永磁电机工程技术研究中心;悉尼理工大学;
【基金】：国家自然科学基金(51307111) 国家重点研发计划(2016YFB0300503) 辽宁省教育厅科学技术研究项目(LGD20160006)
【分类号】：TM341

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