The SR motor is acquiring popularity due to its dynamic characteristics such as higher power, torque, and efficiency. Even though, Vibro-acoustic noise is a significant issue in SR motors, which are caused by radial electromagnetic forces. This research adopted a novel methodology to investigate the various vibro-acoustic noise sources to enhance the performance of real-time SR motors. This methodology integrates transient model-based multiphysics and experimental analysis to predict the vibro-acoustic noise sources in SR motors. A multiphysics model incorporates not only the EM and acoustic fields, but also the structural geometry and variably distributed EM forces, to predict and analyse the EM vibro-acoustic noise in SR motor. The experimental results reveal that the maximum vibro-acoustic noise amplitudes are observed at 150, 240, 570, 920, 1210, and 1650 Hz due to uneven EM forces. To verify the presence of experimental vibro-acoustic noise levels at different frequencies, a transient model-based multiphysics analysis is investigated. The vibro-acoustic noise distribution trends seen in the simulation are consistent with those seen in the experiments. Finally, based on the simulation and experimental results revealed that EM forces, load-current changes, flux density, torque ripples are the significant reasons for greatest vibro-acoustic noise levels in the SR motor.

中文翻译：

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通过电动汽车应用中基于瞬态模型的多物理场分析对开关磁阻电机中的振动声学噪声进行实验研究

SR 电机因其较高的功率、扭矩和效率等动态特性而受到欢迎。尽管如此，振动噪声仍然是 SR 电机中的一个重要问题，它是由径向电磁力引起的。这项研究采用了一种新颖的方法来研究各种振动声学噪声源，以提高实时 SR 电机的性能。该方法集成了基于瞬态模型的多物理场和实验分析来预测 SR 电机中的振动声学噪声源。多物理场模型不仅包含电磁场和声场，还包含结构几何形状和变化分布的电磁力，以预测和分析 SR 电机中的电磁振动声学噪声。实验结果表明，由于不均匀的电磁力，在 150、240、570、920、1210 和 1650 Hz 处观察到最大振动声学噪声幅度。为了验证不同频率下实验振动声学噪声水平的存在，研究了基于瞬态模型的多物理场分析。仿真中看到的振动声学噪声分布趋势与实验中看到的一致。最后，基于仿真和实验结果表明，电磁力、负载电流变化、磁通密度、扭矩脉动是 SR 电机中最大振动声学噪声水平的重要原因。