Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type Rotor
The use of a magnetic adjustable speed drive is a popular choice in industrial settings due to its efficient operation, vibration isolation, low maintenance, and overload protection. Most conventional magnetic adjustable speed drives use various forms of the permanent magnets (PMs). Due to the PMs,...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Mathematics |
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| Online Access: | https://www.mdpi.com/2227-7390/10/19/3712 |
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| author | Songlin Guo Zhengkang Yi Pan Liu Guoshuai Wang Houchuan Lai Kexun Yu Xianfei Xie |
| author_facet | Songlin Guo Zhengkang Yi Pan Liu Guoshuai Wang Houchuan Lai Kexun Yu Xianfei Xie |
| author_sort | Songlin Guo |
| collection | DOAJ |
| description | The use of a magnetic adjustable speed drive is a popular choice in industrial settings due to its efficient operation, vibration isolation, low maintenance, and overload protection. Most conventional magnetic adjustable speed drives use various forms of the permanent magnets (PMs). Due to the PMs, this type of machine has continuous free-wheeling losses in the form of hysteresis and induced eddy currents. In recent years, the homopolar-type rotor has been widely used in high-speed machines, superconducting machines, and in the application of flywheel energy storage. This study proposes a new application of the homopolar-type rotor. A novel adjustable speed drive with a homopolar-type rotor (HTR-ASD), which has obvious advantages (no brush, no permanent magnet, and no mechanical flux regulation device), is designed and analyzed in this study. Its speed and torque can be adjusted only by adjusting the excitation current. Firstly, in this study, the structure, operation principles, and flux-modulated mechanism of the HTR-ASD are studied. The homopolar-type rotor has a special three-dimensional magnetic circuit structure with the same pole. The 3D-FEM is usually used to calculate its parameters, which is time consuming. In this study, an analytical method is developed to solve this issue. To analytically calculate the torque characteristics, the air gap magnetic flux density, and the winding inductance parameter, the equivalent circuit and the air gap permeance are researched to simplify the analysis. Then, the key parameters of the HTR-ASD are calculated. Finally, the performance of the HTR-ASD is comparatively studied using the analytical method and finite element method, and a comparison of the results is carried out. The comparison indicates that the analytical method is in good agreement with simulation results, and that it is very helpful for designing homopolar-type rotor machines. According to the analysis, the proposed adjustable speed drive displays a great performance in relation to the operating characteristics of a flexible mechanical speed drive. |
| first_indexed | 2024-03-09T21:26:56Z |
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| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-09T21:26:56Z |
| publishDate | 2022-10-01 |
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| record_format | Article |
| series | Mathematics |
| spelling | doaj.art-c528212cde984f8891692edaca7efa8f2023-11-23T21:06:14ZengMDPI AGMathematics2227-73902022-10-011019371210.3390/math10193712Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type RotorSonglin Guo0Zhengkang Yi1Pan Liu2Guoshuai Wang3Houchuan Lai4Kexun Yu5Xianfei Xie6State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaSouthwest Institute of Technical Physics, Chengdu 610041, ChinaSouthwest Institute of Technical Physics, Chengdu 610041, ChinaSouthwest Institute of Technical Physics, Chengdu 610041, ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaThe use of a magnetic adjustable speed drive is a popular choice in industrial settings due to its efficient operation, vibration isolation, low maintenance, and overload protection. Most conventional magnetic adjustable speed drives use various forms of the permanent magnets (PMs). Due to the PMs, this type of machine has continuous free-wheeling losses in the form of hysteresis and induced eddy currents. In recent years, the homopolar-type rotor has been widely used in high-speed machines, superconducting machines, and in the application of flywheel energy storage. This study proposes a new application of the homopolar-type rotor. A novel adjustable speed drive with a homopolar-type rotor (HTR-ASD), which has obvious advantages (no brush, no permanent magnet, and no mechanical flux regulation device), is designed and analyzed in this study. Its speed and torque can be adjusted only by adjusting the excitation current. Firstly, in this study, the structure, operation principles, and flux-modulated mechanism of the HTR-ASD are studied. The homopolar-type rotor has a special three-dimensional magnetic circuit structure with the same pole. The 3D-FEM is usually used to calculate its parameters, which is time consuming. In this study, an analytical method is developed to solve this issue. To analytically calculate the torque characteristics, the air gap magnetic flux density, and the winding inductance parameter, the equivalent circuit and the air gap permeance are researched to simplify the analysis. Then, the key parameters of the HTR-ASD are calculated. Finally, the performance of the HTR-ASD is comparatively studied using the analytical method and finite element method, and a comparison of the results is carried out. The comparison indicates that the analytical method is in good agreement with simulation results, and that it is very helpful for designing homopolar-type rotor machines. According to the analysis, the proposed adjustable speed drive displays a great performance in relation to the operating characteristics of a flexible mechanical speed drive.https://www.mdpi.com/2227-7390/10/19/3712homopolar-type rotormagnetic adjustable speed driveanalytical analysisoperating characteristics |
| spellingShingle | Songlin Guo Zhengkang Yi Pan Liu Guoshuai Wang Houchuan Lai Kexun Yu Xianfei Xie Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type Rotor Mathematics homopolar-type rotor magnetic adjustable speed drive analytical analysis operating characteristics |
| title | Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type Rotor |
| title_full | Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type Rotor |
| title_fullStr | Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type Rotor |
| title_full_unstemmed | Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type Rotor |
| title_short | Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type Rotor |
| title_sort | analysis and performance evaluation of a novel adjustable speed drive with a homopolar type rotor |
| topic | homopolar-type rotor magnetic adjustable speed drive analytical analysis operating characteristics |
| url | https://www.mdpi.com/2227-7390/10/19/3712 |
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