变频器供电对永磁电机振动噪声源的影响研究

Research on Influence of Inverter Power Supply on Vibration and Noise Source of Permanent Magnet Motor

永磁电机应用广泛,为我国各项生产生活带来极大便利,但在其运行工作中,由于外部因素施加影响,电机振动产生噪声,对生产环境造成不利影响。文章基于变频器的不同供电效果展开分析,对气隙磁场、电磁激振力做以详细探讨,针对不同种的供电环境下,结合案例分析做出电机振动频率、频次的相关数据,对三维声场进行有限元计算。最终得出具体结论,给永磁电机工作中的降噪处理工作提出理论支持。

Permanent magnet motor is widely used,which brings great convenience to the production and life of our country.However,in its operation,due to external factors,the motor vibration produces noise,which has a negative impact on production environment.Based on the analysis of different power supply effects of frequency inverter,the air gap magnetic field and electromagnetic exciting force are discussed in detail.In view of different power supply environment,combined with case analysis,the relevant data of motor vibration frequency and frequency are made and the three-dimensional sound field is calculated by finite element method.Finally,the specific conclusion is drawn,which provides theoretical support for the noise reduction of permanent magnet motor.