摘要
控制器开关频率对电驱动总成噪声具有较大影响。首先分析了开关频率噪声的产生机理、频率特征及优化方法。由于开关频率噪声频率较高、易使人烦躁,本文使用A计权声压级和音噪比评价其噪声的大小和声品质。经试验验证提高开关频率和随机PWM调制开关策略可以降低电驱动总成噪声、改善声品质。
The switching frequency of the controller has a great influence on the noise of electric powertrain.Firstly,the generation mechanism,frequency characteristics and optimization methods of switching frequency noise are analyzed.The noise frequency of switch is high,which annoys people.In this paper,A-weighting sound pressure level and tone to noise ratio are used to evaluate the switching frequency noise which has the characteristics of high frequency and irritability.The experimental results show that increasing the switching frequency and random PWM control strategy can reduce the noise and improve the sound quality of the electric powertrain.
作者
李基芳
付玉成
孙守富
季祥
LI Ji-fang;FU Yu-cheng;SUN Shou-fu;JI Xiang(CATARC Automotive Test Center(Tianjin)Co.,Ltd.,Tianjin 300399,China)
出处
《汽车电器》
2021年第6期48-51,共4页
Auto Electric Parts
关键词
电驱动总成
开关频率
A计权声压级
音噪比
electric powertrain
switching frequency
A-weighting sound pressure level
tone to noise ratio
