Influence of Force Loading Methods on the Prediction Accuracy of Electromagnetic Vibration and Noise in Electric Motors with Different Pole/Slot Combinations

This study investigates the influence of three force loading methods on the prediction accuracy of electromagnetic vibration and noise in electric motors with different pole/slot combinations. The calculation approach of different electromagnetic force loading methods is firstly deduced and analyzed. Then, a multi-physics model for vibration and noise prediction is established and validated with a noise test. Finally, electric motors with three pole/slot combinations are selected, and the electromagnetic noise predicted by different force loading methods is compared. The results show that distributed force loading method of the electromagnetic force leads to a more accurate solution to the acoustic noise, even if the concentrated force considers the equivalent force couple produced by the translation of the nodal force action point. This study can provide guidance for the design of low-noise electric motors.