首页|An Efficient Rotor-Skewing Model for Mitigating Electromagnetic Vibration and Noise in Fractional-Slot Concentrated-Winding Permanent-Magnet Machines

An Efficient Rotor-Skewing Model for Mitigating Electromagnetic Vibration and Noise in Fractional-Slot Concentrated-Winding Permanent-Magnet Machines

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Rotor-skewing is a widely used approach to mitigate electromagnetic (EM) vibration and noise in permanent-magnet (PM) brushless machines, especially for electric vehicles. Current literature primarily depends on EM force superposition (FSUP) across all axial segments to evaluate different rotor-skewing approaches. While FSUP is adequate for addressing single-order EM noise by identifying the skewing approach that minimizes EM forces at the same frequency, it falls short in fractional-slot concentrated-winding PM machines where multiorder EM noises are pronounced. Since multi-order noises cannot be equated directly to force mitigation, optimization of the skewing approach often relies on coupled-field finite-element analysis (CF-FEA) to predict overall noise levels. Considering the low accuracy of the FSUP method and the slow computation speed of the CF-FEA, this article aims to propose an efficient model that offers both speed and precision. For the first time, a segmented model is proposed to address the impacts of axially uneven distribution of mode shapes, improving the accuracy of rotor-skewing assessments. The design of rotor-skewing is discussed and a high-efficiency optimization framework is established. A 12-slot/10-pole spoke-type PM machine is taken as the case study, where two main noises are mitigated at the same time. The effectiveness of the proposed model is validated by experimental results.

ForceShapeRotorsNoiseVibrationsHarmonic analysisStators

Hang Yin、Wei Hua、Zheng Wu、Jinwen Du

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School of Electrical Engineering, Southeast University, Nanjing, China

School of Electronic Science and Engineering, Southeast University, Nanjing, China

2025

IEEE/ASME transactions on mechatronics

IEEE/ASME transactions on mechatronics

ISSN:
年,卷(期):2025.30(2)
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