A Less-Rare-Earth Permanent Magnet Machine with Hybrid Magnet Configuration for Electric Vehicles
This paper proposes a novel hybrid less-rare-earth permanent magnet (HLEPM) machine, which is designed to meet the demands of electric vehicle (EV) traction machines for high torque output and wide-speed-range high-efficiency performance. The designed machine features a unique hybrid permanent magne...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/12/3051 |
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| author | Hui Yang Peng Wu Dabin Liu Yuehan Zhu Shuhua Fang Heyun Lin |
| author_facet | Hui Yang Peng Wu Dabin Liu Yuehan Zhu Shuhua Fang Heyun Lin |
| author_sort | Hui Yang |
| collection | DOAJ |
| description | This paper proposes a novel hybrid less-rare-earth permanent magnet (HLEPM) machine, which is designed to meet the demands of electric vehicle (EV) traction machines for high torque output and wide-speed-range high-efficiency performance. The designed machine features a unique hybrid permanent magnet arrangement, consisting of V-shaped rare-earth PMs and arc-shaped less-rare-earth PMs, respectively. The V-shaped rare-earth magnets can perform the flux-focusing effect well, not only enhancing the torque output capability but also improving the demagnetization with the standability of the arc-shaped less-rare-earth PMs during active short-circuit (ASC) conditions. First, the proposed machine is thoroughly designed and optimized to balance the torque capability and iron loss. Subsequently, the electromagnetic performance of the proposed HLEPM machine is evaluated using finite-element (FE) analysis and compared with that of a conventional double-layer V-shaped PMSM. Finally, the anti-demagnetization characteristics of the two machines under ASC conditions are analyzed in detail. The results validate the rationality and reliability of the proposed design. |
| format | Article |
| id | doaj-art-1fdcdd65bca043f78e5741d0c5181dc2 |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-1fdcdd65bca043f78e5741d0c5181dc22025-08-20T03:27:15ZengMDPI AGEnergies1996-10732025-06-011812305110.3390/en18123051A Less-Rare-Earth Permanent Magnet Machine with Hybrid Magnet Configuration for Electric VehiclesHui Yang0Peng Wu1Dabin Liu2Yuehan Zhu3Shuhua Fang4Heyun Lin5School of Electrical Engineering, Southeast University, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, Nanjing 210096, ChinaThis paper proposes a novel hybrid less-rare-earth permanent magnet (HLEPM) machine, which is designed to meet the demands of electric vehicle (EV) traction machines for high torque output and wide-speed-range high-efficiency performance. The designed machine features a unique hybrid permanent magnet arrangement, consisting of V-shaped rare-earth PMs and arc-shaped less-rare-earth PMs, respectively. The V-shaped rare-earth magnets can perform the flux-focusing effect well, not only enhancing the torque output capability but also improving the demagnetization with the standability of the arc-shaped less-rare-earth PMs during active short-circuit (ASC) conditions. First, the proposed machine is thoroughly designed and optimized to balance the torque capability and iron loss. Subsequently, the electromagnetic performance of the proposed HLEPM machine is evaluated using finite-element (FE) analysis and compared with that of a conventional double-layer V-shaped PMSM. Finally, the anti-demagnetization characteristics of the two machines under ASC conditions are analyzed in detail. The results validate the rationality and reliability of the proposed design.https://www.mdpi.com/1996-1073/18/12/3051demagnetizationelectric vehicleshigh efficiencyPM machinerare earth |
| spellingShingle | Hui Yang Peng Wu Dabin Liu Yuehan Zhu Shuhua Fang Heyun Lin A Less-Rare-Earth Permanent Magnet Machine with Hybrid Magnet Configuration for Electric Vehicles Energies demagnetization electric vehicles high efficiency PM machine rare earth |
| title | A Less-Rare-Earth Permanent Magnet Machine with Hybrid Magnet Configuration for Electric Vehicles |
| title_full | A Less-Rare-Earth Permanent Magnet Machine with Hybrid Magnet Configuration for Electric Vehicles |
| title_fullStr | A Less-Rare-Earth Permanent Magnet Machine with Hybrid Magnet Configuration for Electric Vehicles |
| title_full_unstemmed | A Less-Rare-Earth Permanent Magnet Machine with Hybrid Magnet Configuration for Electric Vehicles |
| title_short | A Less-Rare-Earth Permanent Magnet Machine with Hybrid Magnet Configuration for Electric Vehicles |
| title_sort | less rare earth permanent magnet machine with hybrid magnet configuration for electric vehicles |
| topic | demagnetization electric vehicles high efficiency PM machine rare earth |
| url | https://www.mdpi.com/1996-1073/18/12/3051 |
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