摘要
为研究某同步交流电机的噪声来源和噪声变化规律,该文通过试验对交流电机的噪声特性进行研究。首先设计开发了电机噪声振动分析系统,采集电机在空载及负载状态下噪声的时域信号;其次利用频谱、阶次分析等方法,找出了发电机在两种工况下噪声峰值的主要阶次成分,并找到了电磁噪声出现峰值现象的原因。分析结果表明,电机在空载工况下,风扇噪声是最大的噪声源;负载工况下,发电机转速在3000r/min和6000r/min附近出现的噪声峰值是由36阶径向电磁力波引起电机机壳的共振而产生的。
In order to study the noise of a vehicle synchronous AC motor,the noise characteristics of a vehicle’s alternator were studied experimentally.Firstly,the noise vibration analysis system of motor vehicle is designed and developed,and the time domain signal of the noise of the motor in no-load and load condition is acquired.Secondly,the main order components of the noise peak value of the generator were found through the methods of frequency spectrum and order analysis in the loading condition,and the cause of peak phenomenon of electromagnetic noise was found.The results show that the fan noise is the biggest noise source under no-load condition,and In the load condition,the noise peak at the vicinity of 3000r/min and 6000r/min is generated by the resonance of the 36-step radial electromagnetic wave causing the motor end cover.
作者
杨平
Yang Ping(Chongqing Radio and TV University,College of Intelligent Manufacturing and Automobile,Chongqing 401520)
出处
《汽车实用技术》
2020年第16期140-142,共3页
Automobile Applied Technology
基金
2019重庆市教委科学技术研究项目(KJQN201904001)
2019年重庆工商职业学院科学研究一般项目(NDYB2019-01)。
关键词
发电机
电磁噪声
噪声试验
阶次分析
Automobile generator
Electromagnetic noise
Noise test-bed
Order analysis
