首页 | 本学科首页   官方微博 | 高级检索  
     

大功率高速永磁电机柔性转子系统模态分析
引用本文:杜光辉,黄娜,张凤阁,王天煜. 大功率高速永磁电机柔性转子系统模态分析[J]. 电工技术学报, 2017, 32(22). DOI: 10.19595/j.cnki.1000-6753.tces.L70425
作者姓名:杜光辉  黄娜  张凤阁  王天煜
作者单位:1. 西安工业大学电子信息工程学院 西安 710021;2. 中车永济电机有限公司 西安 710016;3. 沈阳工业大学电气工程学院 沈阳 110870;4. 沈阳工程学院机械工程学院 沈阳 110136
摘    要:高速电机的转速高、转子细长,与常速电机相比接近临界转速的可能性大大增加,当电机额定转速接近临界转速时,电机会发生剧烈的振动,甚至使转子损坏。大功率高速电机的转子长度远远大于转子直径,很难设计为刚性转子,需要穿越1阶临界转速,工作在1阶临界转速和2阶临界转速中间的安全区域,而这个安全区域的范围却很小,这对大功率高速电机转子系统的动力学设计带来了极大的困难。基于一台1.12MW、18 000r/min的高速永磁电机,对转子系统的动力学特性进行理论分析,对有叶轮和无叶轮状态下的转子模态和临界转速进行计算,分析轴承支承刚度、陀螺效应以及转子主要尺寸对临界转速的影响,并通过样机进行了实验验证,总结了相应的规律,为大功率高速电机挠性转子的设计提供了参考。

关 键 词:高速电机  临界转速  柔性转子  转子模态  支承刚度  陀螺效应

Modal Analysis of the Flexible Rotor System for High-Power High-Speed Permanent Magnet Machine
Du Guanghui,Huang Na,Zhang Fengge,Wang Tianyu. Modal Analysis of the Flexible Rotor System for High-Power High-Speed Permanent Magnet Machine[J]. Transactions of China Electrotechnical Society, 2017, 32(22). DOI: 10.19595/j.cnki.1000-6753.tces.L70425
Authors:Du Guanghui  Huang Na  Zhang Fengge  Wang Tianyu
Abstract:For high speed machine, it is far more vulnerable when the rated speed close to critical speed. Under this circumstance, severe vibration will occur and even damage the rotor. For high-power high-speed machine, the rotor length is much greater than the diameter of the rotor. It needs to be designed as a flexible rotor system. The rated speed passes through the first-order critical speed, working in the security zone between the first-order critical speed and the second-order critical speed. But the scope of this security zone is very small, which brings great difficulties in designing high-power high-speed motor rotor system. In this paper, based on a 1.12MW, 18 000r/min high-speed permanent magnet (PM) machine, the dynamic characteristics of rotor system are analyzed theoretically, while the rotor modal and critical speed are also calculated. And then, the influencing factors on rotor critical speed are analyzed, including bearing stiffness, gyroscopic effect and the rotor main dimensions. Finally, a prototype is manufactured and a rotor vibration test is developed. The experimental results have validated the rotor critical speed analysis. It would provide the reference to rotor system design for high-power high-speed machine.
Keywords:High speed machine  critical speed  flexible rotor  rotor modal  bearing stiffness  gyroscopic effect
本文献已被 CNKI 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号