基于多场耦合的断条状态下感应电机电磁振动噪声规律研究

对于电机的电磁振动噪声问题,仅通过电磁计算激励源特性分析较难预测电机实际的振动噪声情况。本文基于电磁场、结构场及声场的多场耦合分析方法,以YE2-90L-4感应电机为例,结合电机结构与实际安装方式,对断条状态下的电机电磁激振力、结构振动响应以及电机周围声场声压分布进行多场联合仿真,从而计算出断条故障对于电机振动噪声的影响。最后通过进行故障试验,发现断条故障所导致的电机电磁振动噪声规律与仿真结果较吻合,该方法在电机设计初期便能对实际运行的振动噪音进行准确评估。

The Quantitative Evaluation of Electromagnetic Vibration and Noise of Induction Motor with the Broken Bar Fault Based on Multi-field Coupling Analysis

It is difficult to predict the actual vibration noise of the motor only by analyzing the characteristics of the excitation source through electromagnetic calculation. In this paper, the multi-field coupling FEA method is adopted which include the electromagnetic field, structure field and sound field, taking YE2-90 L-4 induction motor as an example, electromagnetic exciting force, structural vibration response and pressure distribution of sound field around the motor with broken bar are analyzed considering the structure and actual installation of the motor. And the influence of broken bar fault on vibration and noise of motor is also calculated. Finally, the law of electromagnetic vibration noise of the motor caused by the fault of broken bar is tested, which is consistent with the simulation. This method can accurately evaluate the actual vibration noise in the early stage of the motor design.