基于谐响应的大型异步电机电磁振动分析
Electromagnetic vibration of asynchronous electrical machine based on harmonic response
李巍 1刘阳 1陈伟2
作者信息
- 1. 同济大学 电子与信息工程学院,上海 201804
- 2. 上海新时达电气股份有限公司,上海 201801
- 折叠
摘要
大型异步电机的电磁振动是电机振动的主要构成部分,对电机振动等级的评估需要进行准确的电磁振动分析,本文以一台10 kV兆瓦级大型异步电机为对象进行电磁振动分析.首先对完整的电机模型进行模态分析,求解固有频率及对应振型,并实验测量了电机实际运行时的固有频率;然后将电磁场二维有限元计算得到的径向电磁力作为载荷,对该电机进行谐响应分析,最后与实验测得的振动速率对比.结果表明,基于电机整机模型的模态分析和谐响应分析可以较为准确地分析大型异步电机电磁振动,能够为电机的优化设计或电磁振动抑制提供理论依据.
Abstract
The electromagnetic vibration of large induction motor is the main component of the motor vi-bration.The evaluation of the motor vibration grade requires accurate electromagnetic vibration analysis.The electromagnetic vibration of a 10 kV megawatt induction motor was analyzed.Firstly,the mode anal-ysis of the complete motor model was carried out to solve its natural frequency and corresponding mode,and the actual operation of the motor natural frequency was measured experimentally.Then,the radial e-lectromagnetic force obtained by two-dimensional finite element calculation of electromagnetic field was used as the load to analyze the harmonic response of the motor.Finally,the vibration velocity was com-pared with that measured by experiment.The results show that the electromagnetic vibration analysis re-sults can be obtained accurately based on the mode analysis and harmonious response analysis of the whole model of large induction motor,which can provide a theoretical basis for the optimization design of the motor or electromagnetic vibration suppression.
关键词
异步电机/电磁振动/模态分析/谐响应/电磁力/有限元Key words
induction motor/electromagnetic vibration/mode analysis/harmonic response/electromag-netic force/finite element method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据