中文摘要：

硅钢片的磁致伸缩是永磁电机产生振动噪声的原因之一。本文基于压磁方程,建立了考虑磁致伸缩效应的磁-机械耦合模型,给出求解区域内的基本假设及相应的边界条件,以一台11kW永磁同步电机为例,应用有限元计算了在理想电流和实验电流供电下由电磁力和磁致伸缩效应两种振动源单独和共同作用时引起的振动;在此基础上分析了电机周围的声场分布。为了验证模型,对该永磁电机的振动和噪声分别进行了实验研究。理论计算与测量结果的比较验证了该耦合模型的正确性,为在设计阶段计算永磁电机振动噪声大小、分布和寻求新的降噪措施,提供了理论依据和计算方法。

英文摘要：

An important source of PMSM noise is magnetostrictive vibration of the magnetic core. Based on the piezomagnetic laws,a magentic-mechanical coupling model was proposed which can take the magnetostrictive effect into account. Hypothetical and boundary conditions of the solving region were also provided. Using finite element analysis software,the vibration of a 11 kW PMSM was calculated with ideal current supply and measured current supply,and what need to point out is the calculation was done considering only electromagnetic force or magnetostricive effect and both of them. And then,the acoustic field distribution around the motor was analyzed. In order to verify the model,the vibration and noise were studied experimentally. The validity of the proposed method was confirmed by numerical calculation results and experimental results. Furthermore,this method which could help prediction the noise level in PMSM design step and seek new denoise methods has great potential in the future application.