潜水电机电磁噪声分析和对比

针对传统的潜水感应电机和一种具有更高效率的新型潜水永磁辅助同步磁阻电机（PMASRM），利用多物理场耦合有限元仿真，分析和对比其电磁噪声。在电磁场有限元软件中对电机的气隙磁密和径向电磁力波结果进行二维傅里叶分解，分析了气隙磁场和径向力波的时空特性。PMASRM转子磁导作用产生的气隙磁密谐波空间阶次更高，造成的径向电磁力波阶次更高，可以降低电磁噪声水平。声学仿真结果验证了上述结论。

Analysis and Comparison of Electromagnetic Noises of Submersible Motors

The electromagnetic noises of traditional submersible induction motor and a new type of submersible permanent magnet assisted synchronous reluctance motor (PMASRM) with higher efficiency are analyzed and compared by using multi-physical-field-coupling finite element analysis. In the electromagnetic field finite element software, the results of air-gap flux density and radial electromagnetic force wave are decomposed by 2D Fourier transform, and the space-time characteristics of air-gap magnetic field and radial force wave are analyzed. The spatial order of air-gap flux density harmonics generated by the rotor PMASRM is higher, and the order of radial electromagnetic force wave is also higher, which can lower the level of electromagnetic noise. The acoustic simulation results verify the conclusion.