非晶合金电机振动噪声特性分析与实验研究

Characteristics Analysis and Experimental Study of Vibration and Noise of a Amorphous Metal Motor

相对于硅钢片电机,非晶合金电机具有损耗小、效率高、温升低的特点,但同时也对减振降噪带来更大的挑战。针对这一问题,本文首先推导出电机振动噪声的解析表达式,对磁化曲线与磁滞伸缩曲线分析表明,磁滞伸缩效应是导致非晶合金电机振动噪声过大的主要原因。其次,采用COMSOL软件进行实验样机的有限元计算,获取非晶合金电机与硅钢片电机声压级与振动位移云图。最后对两台7kW实验样机的振动和噪声特性进行实验测量和数值分析,并与前面的理论和有限元预测结果进行了对比。本文方法为在设计阶段计算非晶合金电机振动噪声大小、分布和寻求新的降噪措施,提供了理论依据和计算方法。

Comparing to silicon steel sheet motor,the amorphous metal motor have the advantages of lower losses,higher efficiency,lower temperature rise,but with much stricter requirements to vibration and noise.To solve this problem,the analytical expressions of vibration and noise were induced firstly,the investigation on magnetization curve and magnetostriction curve indicates that the vibration and noise of amorphous metal motor is lager because of the magnetostriction effect.Moreover,finite element analysis was used to obtain the sound pressure level and vibration displacement nephogram.Finally,vibration and noise characteristics of two prototype were measured and numerically analyzed,comparisons were also made between estimated modals and experiment results.Furthermore,this method which could help prediction the noise level in amorphous metal motor design step and seek new denoise methods has great potential in the future application.