Study on Air-Cooled Structure of Direct-Drive Outer-Rotor Permanent Magnet Synchronous Generator for Wind Power Generation
Direct-drive permanent magnet synchronous generators (DD-PMSGs) have been widely adopted in wind power generation systems owing to their distinctive advantages, including direct-drive operation, high power density, and superior energy conversion efficiency. However, the high power density of the gen...
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MDPI AG
2025-07-01
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| Online Access: | https://www.mdpi.com/2076-3417/15/14/8008 |
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| author | Xudong Yang Ke Li Yiguang Chen Haiying Lv Jingjuan Du |
| author_facet | Xudong Yang Ke Li Yiguang Chen Haiying Lv Jingjuan Du |
| author_sort | Xudong Yang |
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| description | Direct-drive permanent magnet synchronous generators (DD-PMSGs) have been widely adopted in wind power generation systems owing to their distinctive advantages, including direct-drive operation, high power density, and superior energy conversion efficiency. However, the high power density of the generator inevitably leads to heat generation issues, which affect the reliability of the generator. To address the thermal issues in the 4.5 MW direct-drive permanent magnet synchronous generator (DD-PMSG), this paper proposes a novel forced air-cooling ventilation system. Through comprehensive computational fluid dynamics (CFD) simulations and fundamental thermodynamic analysis, the cooling performance is systematically evaluated to determine the optimal width of the stator ventilation ducts. Furthermore, based on the temperature distribution of the stator and rotor, three optimization schemes for non-uniform core segments are proposed. By comparing the ventilation cooling performance under three structural schemes, the optimal structural scheme is provided for the generator. Finally, the feasibility of the heat dissipation scheme and the accuracy of the simulation calculations are verified by fabricating a prototype and setting up an experimental platform. The above conclusions and research results can provide some reference for the design of the core ventilation ducts structure of subsequent wind turbines. |
| format | Article |
| id | doaj-art-7ac7babea7fc4f94aac126636b632d07 |
| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-7ac7babea7fc4f94aac126636b632d072025-08-20T03:13:44ZengMDPI AGApplied Sciences2076-34172025-07-011514800810.3390/app15148008Study on Air-Cooled Structure of Direct-Drive Outer-Rotor Permanent Magnet Synchronous Generator for Wind Power GenerationXudong Yang0Ke Li1Yiguang Chen2Haiying Lv3Jingjuan Du4School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Control and Mechanical Engineering, Tianjin Chengjian University, Tianjin 300384, ChinaSchool of Electrical and Information Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Engineering and Technology, Tianjin Agricultural University, Tianjin 300384, ChinaSchool of Control and Mechanical Engineering, Tianjin Chengjian University, Tianjin 300384, ChinaDirect-drive permanent magnet synchronous generators (DD-PMSGs) have been widely adopted in wind power generation systems owing to their distinctive advantages, including direct-drive operation, high power density, and superior energy conversion efficiency. However, the high power density of the generator inevitably leads to heat generation issues, which affect the reliability of the generator. To address the thermal issues in the 4.5 MW direct-drive permanent magnet synchronous generator (DD-PMSG), this paper proposes a novel forced air-cooling ventilation system. Through comprehensive computational fluid dynamics (CFD) simulations and fundamental thermodynamic analysis, the cooling performance is systematically evaluated to determine the optimal width of the stator ventilation ducts. Furthermore, based on the temperature distribution of the stator and rotor, three optimization schemes for non-uniform core segments are proposed. By comparing the ventilation cooling performance under three structural schemes, the optimal structural scheme is provided for the generator. Finally, the feasibility of the heat dissipation scheme and the accuracy of the simulation calculations are verified by fabricating a prototype and setting up an experimental platform. The above conclusions and research results can provide some reference for the design of the core ventilation ducts structure of subsequent wind turbines.https://www.mdpi.com/2076-3417/15/14/8008wind turbine generatorforced air coolingventilation structure optimizationnon-uniform core segments |
| spellingShingle | Xudong Yang Ke Li Yiguang Chen Haiying Lv Jingjuan Du Study on Air-Cooled Structure of Direct-Drive Outer-Rotor Permanent Magnet Synchronous Generator for Wind Power Generation Applied Sciences wind turbine generator forced air cooling ventilation structure optimization non-uniform core segments |
| title | Study on Air-Cooled Structure of Direct-Drive Outer-Rotor Permanent Magnet Synchronous Generator for Wind Power Generation |
| title_full | Study on Air-Cooled Structure of Direct-Drive Outer-Rotor Permanent Magnet Synchronous Generator for Wind Power Generation |
| title_fullStr | Study on Air-Cooled Structure of Direct-Drive Outer-Rotor Permanent Magnet Synchronous Generator for Wind Power Generation |
| title_full_unstemmed | Study on Air-Cooled Structure of Direct-Drive Outer-Rotor Permanent Magnet Synchronous Generator for Wind Power Generation |
| title_short | Study on Air-Cooled Structure of Direct-Drive Outer-Rotor Permanent Magnet Synchronous Generator for Wind Power Generation |
| title_sort | study on air cooled structure of direct drive outer rotor permanent magnet synchronous generator for wind power generation |
| topic | wind turbine generator forced air cooling ventilation structure optimization non-uniform core segments |
| url | https://www.mdpi.com/2076-3417/15/14/8008 |
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