电工技术学报2017，Vol.32Issue(22)：101-107,7.DOI:10.19595/j.cnki.1000-6753.tces.L70425
大功率高速永磁电机柔性转子系统模态分析
Modal Analysis of the Flexible Rotor System for High-Power High-Speed Permanent Magnet Machine
杜光辉 1黄娜 2张凤阁 3王天煜4
作者信息
- 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
- 折叠
摘要
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.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Key words
High speed machine/critical speed/flexible rotor/rotor modal/bearing stiffness/gyroscopic effect分类
信息技术与安全科学引用本文复制引用
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):101-107,7.
