Title: Research on noise field of PMSG demagnetisation fault

Authors: Hailiang Zhao; Ran An; Xiangfeng Li; Wei Yang; Zhiyan Zhang; Chengwei Jiang

Addresses: College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, China; CGN New Energy Anhui Co., Ltd., Hefei, 230093, China ' College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, China ' College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, China ' CGN New Energy Anhui Co., Ltd, Hefei, 230093, China ' College of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, China ' CGN New Energy Anhui Co., Ltd, Hefei, 230093, China

Abstract: The internal air gap magnetic field exhibits harmonics under normal running condition of a permanent magnet synchronous generator (PMSG). In this paper, the mathematical models of the radial electromagnetic force and vibration noise of the PMSG are established, and the influence of the demagnetisation fault on them is analysed theoretically. A 1 kW, 12-pole prototype is studied, and the two-dimensional electromagnetic field and three-dimensional noise field models of the PMSG are established, and the radial electromagnetic force is used as the excitation to couple the electromagnetic vibration and noise. The operation states of the PMSG under normal and different demagnetisation fault conditions are simulated, and the simulation results show that the air gap flux density shows a large distortion under the demagnetisation fault conditions. The fundamental wave amplitude decreases, the sound pressure level distribution of the noise field presents a chaotic state, and the sound pressure increases significantly.

Keywords: PMSG; demagnetisation fault; noise field; electromagnetic field; radial electromagnetic force; air-gap flux density.

DOI: 10.1504/IJMIC.2024.135534

International Journal of Modelling, Identification and Control, 2024 Vol.44 No.1, pp.32 - 40

Received: 16 Aug 2022
Received in revised form: 19 Sep 2022
Accepted: 21 Sep 2022
Published online: 18 Dec 2023 *

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