Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor
Pulse width modulation current harmonics and space harmonics are some of the major factors affecting the rotor eddy current loss of the high-speed permanent magnet motor. In this study, based on the principle of the equivalent current sheet, a two-dimensional motor model in a rectangular coordinate...
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MDPI AG
2022-05-01
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| Series: | Machines |
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| Online Access: | https://www.mdpi.com/2075-1702/10/5/346 |
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| author | Bo Pan Dajun Tao Baojun Ge Likun Wang Peng Hou |
| author_facet | Bo Pan Dajun Tao Baojun Ge Likun Wang Peng Hou |
| author_sort | Bo Pan |
| collection | DOAJ |
| description | Pulse width modulation current harmonics and space harmonics are some of the major factors affecting the rotor eddy current loss of the high-speed permanent magnet motor. In this study, based on the principle of the equivalent current sheet, a two-dimensional motor model in a rectangular coordinate system was established. Considering the armature reaction, the end effect, and the current harmonics generated by variable frequency power supply, the eddy current loss of the rotor at different frequencies was analyzed and calculated using the analytical and finite element methods (FEM). When the frequency is between 200 Hz and 600 Hz, the variation trend of the rotor eddy current loss with a frequency obtained by analytical calculation and FEM analysis is roughly the same, and the error is still within a reasonable range. However, as the frequency continues to increase, the error between the two becomes larger and larger. Furthermore, based on the two-dimensional FE model, the influence of the sleeve material, the thickness, and the composite structure on the rotor eddy current loss were studied and analyzed. It was found that adding a graphene shielding layer between the permanent magnet and the sleeve can effectively shield the harmonic magnetic field, greatly reduce the eddy current loss of the permanent magnet, and effectively prevent the temperature of the permanent magnet from being too high, which is conducive to the continuous and stable operation of the high-speed permanent magnet motor. |
| first_indexed | 2024-03-10T03:33:06Z |
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| id | doaj.art-b1a60a514b634bfe82038037da331378 |
| institution | Directory Open Access Journal |
| issn | 2075-1702 |
| language | English |
| last_indexed | 2024-03-10T03:33:06Z |
| publishDate | 2022-05-01 |
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| spelling | doaj.art-b1a60a514b634bfe82038037da3313782023-11-23T11:52:38ZengMDPI AGMachines2075-17022022-05-0110534610.3390/machines10050346Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous MotorBo Pan0Dajun Tao1Baojun Ge2Likun Wang3Peng Hou4National Engineering Research Center of Large Electric Machines and Heat Transfer Technology, Harbin University of Science and Technology, Harbin 150080, ChinaNational Engineering Research Center of Large Electric Machines and Heat Transfer Technology, Harbin University of Science and Technology, Harbin 150080, ChinaNational Engineering Research Center of Large Electric Machines and Heat Transfer Technology, Harbin University of Science and Technology, Harbin 150080, ChinaNational Engineering Research Center of Large Electric Machines and Heat Transfer Technology, Harbin University of Science and Technology, Harbin 150080, ChinaNational Engineering Research Center of Large Electric Machines and Heat Transfer Technology, Harbin University of Science and Technology, Harbin 150080, ChinaPulse width modulation current harmonics and space harmonics are some of the major factors affecting the rotor eddy current loss of the high-speed permanent magnet motor. In this study, based on the principle of the equivalent current sheet, a two-dimensional motor model in a rectangular coordinate system was established. Considering the armature reaction, the end effect, and the current harmonics generated by variable frequency power supply, the eddy current loss of the rotor at different frequencies was analyzed and calculated using the analytical and finite element methods (FEM). When the frequency is between 200 Hz and 600 Hz, the variation trend of the rotor eddy current loss with a frequency obtained by analytical calculation and FEM analysis is roughly the same, and the error is still within a reasonable range. However, as the frequency continues to increase, the error between the two becomes larger and larger. Furthermore, based on the two-dimensional FE model, the influence of the sleeve material, the thickness, and the composite structure on the rotor eddy current loss were studied and analyzed. It was found that adding a graphene shielding layer between the permanent magnet and the sleeve can effectively shield the harmonic magnetic field, greatly reduce the eddy current loss of the permanent magnet, and effectively prevent the temperature of the permanent magnet from being too high, which is conducive to the continuous and stable operation of the high-speed permanent magnet motor.https://www.mdpi.com/2075-1702/10/5/346high-speed permanent magnet motorgraphene PWM time harmonicrotor eddy currenttwo-dimensional finite element |
| spellingShingle | Bo Pan Dajun Tao Baojun Ge Likun Wang Peng Hou Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor Machines high-speed permanent magnet motor graphene PWM time harmonic rotor eddy current two-dimensional finite element |
| title | Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor |
| title_full | Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor |
| title_fullStr | Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor |
| title_full_unstemmed | Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor |
| title_short | Analysis of Eddy Current Loss of 120-kW High-Speed Permanent Magnet Synchronous Motor |
| title_sort | analysis of eddy current loss of 120 kw high speed permanent magnet synchronous motor |
| topic | high-speed permanent magnet motor graphene PWM time harmonic rotor eddy current two-dimensional finite element |
| url | https://www.mdpi.com/2075-1702/10/5/346 |
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