动车组牵引变压器电磁噪声优化及声音品质分析

Optimization and sound quality analysis for electromagnetic noise of EMU traction transformer

针对动车组牵引变压器电磁噪声过大、声音品质差的问题,文章对引起噪声的变流器四象限整流器电流谐波进行了系统地理论分析,得出电流谐波大小的影响因素。通过试验验证各个影响因子对电流谐波的优化效果和降噪效果,分析变压器电磁噪声的声音品质,识别出声音品质差的频段。

Aiming at the problem of excessive electromagnetic noise and poor sound quality of EMU traction transformer,this paper systematically analyzes the current harmonics of the four-quadrant rectifier of converter that causes the noise,and obtains the influencing factors of current harmonics.The optimization effect and noise reduction effect of each influencing factor on current harmonics are verified by tests.The sound quality of transformer electromagnetic noise is analyzed,and the frequency band with poor sound quality is identified.