Analysis and Reduction of Cogging Torque of Permanent Magnet Synchronous Wind Generators Based on the Magnetic Field Modulation Mechanism
In this paper, a magnetic field modulation model considering the influence of phase angles is established for the analysis and weakening of the cogging torque of the permanent magnet synchronous wind generations. Compared with the existing analytical model, the modulation effect of the magnetic fiel...
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| Format: | Article |
| Language: | English |
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China Electrotechnical Society
2024-12-01
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| Series: | CES Transactions on Electrical Machines and Systems |
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| Online Access: | https://ieeexplore.ieee.org/document/10770096 |
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| _version_ | 1846096136623882240 |
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| author | Zexing Li Chao Liu Yiwen Fan Zixuan Zhang Jiakuan Xia |
| author_facet | Zexing Li Chao Liu Yiwen Fan Zixuan Zhang Jiakuan Xia |
| author_sort | Zexing Li |
| collection | DOAJ |
| description | In this paper, a magnetic field modulation model considering the influence of phase angles is established for the analysis and weakening of the cogging torque of the permanent magnet synchronous wind generations. Compared with the existing analytical model, the modulation effect of the magnetic field harmonics and phase angle on the cogging torque components is analyzed in the new model. Firstly, flux density model with phase angle characteristics is derived, and the relationship of the cogging torque and magnetic field harmonic is analyzed using energy method. Then, based on the magnetic modulation mechanism, the impact of the phase angle and magnetic field harmonics on the coupling relationship among cogging torque components is analyzed. All cogging torque components are classified as a combination of multiple positive and negative harmonic components, and the contribution characteristics of the components are determined by the harmonic combination and phase angle characteristics. Based on the finite element model (FEM), the magnetic field modulation model of the cogging torque is proved. On the basis of the conclusions obtained, it is further explained that the suppression mechanism of rotor-step skewing is a mutual complementary effect of the positive components and negative cogging components, and the main harmonic is effectively offset by selecting the seasonable of segment number and skewed angle of rotor. Finally, in order to verify the validity of the analysis method, the no-load line back EMF and cogging torque of optimized prototype is tested, and the experimental results agree well with the FEM results. |
| format | Article |
| id | doaj-art-74d1b6ef68d544b3b2d41cdf551c32b2 |
| institution | Kabale University |
| issn | 2096-3564 2837-0325 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | China Electrotechnical Society |
| record_format | Article |
| series | CES Transactions on Electrical Machines and Systems |
| spelling | doaj-art-74d1b6ef68d544b3b2d41cdf551c32b22025-01-02T07:59:50ZengChina Electrotechnical SocietyCES Transactions on Electrical Machines and Systems2096-35642837-03252024-12-018446347010.30941/CESTEMS.2024.00040Analysis and Reduction of Cogging Torque of Permanent Magnet Synchronous Wind Generators Based on the Magnetic Field Modulation Mechanism Zexing Li0https://orcid.org/0000-0002-4643-7561Chao Liu1Yiwen Fan2https://orcid.org/0000-0001-5041-359XZixuan Zhang3https://orcid.org/0000-0003-0065-6811Jiakuan Xia4Zhengzhou Electric Power CollegeChina Electric Power Research InstituteChina Electric Power Research InstituteState Grid Henan Energy Interconnection Power Design Institute Co. LTDShenyang University of TechnologyIn this paper, a magnetic field modulation model considering the influence of phase angles is established for the analysis and weakening of the cogging torque of the permanent magnet synchronous wind generations. Compared with the existing analytical model, the modulation effect of the magnetic field harmonics and phase angle on the cogging torque components is analyzed in the new model. Firstly, flux density model with phase angle characteristics is derived, and the relationship of the cogging torque and magnetic field harmonic is analyzed using energy method. Then, based on the magnetic modulation mechanism, the impact of the phase angle and magnetic field harmonics on the coupling relationship among cogging torque components is analyzed. All cogging torque components are classified as a combination of multiple positive and negative harmonic components, and the contribution characteristics of the components are determined by the harmonic combination and phase angle characteristics. Based on the finite element model (FEM), the magnetic field modulation model of the cogging torque is proved. On the basis of the conclusions obtained, it is further explained that the suppression mechanism of rotor-step skewing is a mutual complementary effect of the positive components and negative cogging components, and the main harmonic is effectively offset by selecting the seasonable of segment number and skewed angle of rotor. Finally, in order to verify the validity of the analysis method, the no-load line back EMF and cogging torque of optimized prototype is tested, and the experimental results agree well with the FEM results.https://ieeexplore.ieee.org/document/10770096magnetic field modulation modelcogging torqueenergy method |
| spellingShingle | Zexing Li Chao Liu Yiwen Fan Zixuan Zhang Jiakuan Xia Analysis and Reduction of Cogging Torque of Permanent Magnet Synchronous Wind Generators Based on the Magnetic Field Modulation Mechanism CES Transactions on Electrical Machines and Systems magnetic field modulation model cogging torque energy method |
| title | Analysis and Reduction of Cogging Torque of Permanent Magnet Synchronous Wind Generators Based on the Magnetic Field Modulation Mechanism |
| title_full | Analysis and Reduction of Cogging Torque of Permanent Magnet Synchronous Wind Generators Based on the Magnetic Field Modulation Mechanism |
| title_fullStr | Analysis and Reduction of Cogging Torque of Permanent Magnet Synchronous Wind Generators Based on the Magnetic Field Modulation Mechanism |
| title_full_unstemmed | Analysis and Reduction of Cogging Torque of Permanent Magnet Synchronous Wind Generators Based on the Magnetic Field Modulation Mechanism |
| title_short | Analysis and Reduction of Cogging Torque of Permanent Magnet Synchronous Wind Generators Based on the Magnetic Field Modulation Mechanism |
| title_sort | analysis and reduction of cogging torque of permanent magnet synchronous wind generators based on the magnetic field modulation mechanism |
| topic | magnetic field modulation model cogging torque energy method |
| url | https://ieeexplore.ieee.org/document/10770096 |
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