Influences of Magnet Arrangements on Air-Gap Field Modulation Effects in Interior Consequent-Pole PM Machines

Li, Ya; Yang, Hui; Lin, Heyun; Ding, Shichuan; Hang, Jun; Li, Wei

doi:10.1109/tte.2022.3202090

Cited by 7 publications

(1 citation statement)

References 44 publications

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“…The hairpin winding configuration has been widely used in EVs to increase the power density of electric vehicle motors by enhancing the slot-filling factor [18]- [20]. Double V-shape rotor topology has a wider constant power range and double-layer PMs topology has stronger anti-demagnetization ability and wider high efficiency interval [21]- [23].…”

Section: Methodsmentioning

confidence: 99%

Multi-Objective Optimization for Noise Reduction of IPMSM Based on Non-Uniform Air Gap

Zhang,

Yang,

et al. 2024

IEEE Access

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Owning to high speed of interior permanent magnet synchronous motor (IPMSM), the highfrequency howling noise of electromagnetic vibration is disruptive to passengers. The harmonics of the electromagnetic force serve as the primary source of vibration noise. In this work, a non-uniform air gap with a microgroove surface of the motor was proposed for optimizing the harmonics of the electromagnetic force. The research was based on a developing project of a 150 kW IPMSM for a battery electric vehicle (BEV). To find the optimal microgroove surface of the rotor, six variables were defined for the microgrooves through 9900 calculations using the Ansys Workbench. By finite element analysis (FEA) comparisons, the nonuniform air gap with microgroove surface significantly reduced the no-load back Electromotive Force (EMF) harmonics, the total distortion rate (THD) from 2.57% to 1.52%, and the torque ripple from 10.84% to 4.06%. A motor prototype with a non-uniform air gap was manufactured to prove the accuracy of the simulation.Under the whole open throttle (WOT) condition, the vibration acceleration of the 24th and 48th order was approximately 10 dB lower than the target vibration noise limit. INDEX TERMSInterior permanent magnet synchronous motor, Non-uniform air gap with microgroove surface, Multi-objective optimization, Vibration noise.

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