Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System
The emerging global wave energy industry has great potential to contribute to the world’s energy needs. However, one of the key challenges in designing a wave energy converter (WEC) is the wave energy generator. Thus, this paper focuses on the optimal design of a cylindrical permanent magn...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2018-11-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/11/11/3109 |
| _version_ | 1811213346119090176 |
|---|---|
| author | Hong-wei Fang Ru-nan Song Zhao-xia Xiao |
| author_facet | Hong-wei Fang Ru-nan Song Zhao-xia Xiao |
| author_sort | Hong-wei Fang |
| collection | DOAJ |
| description | The emerging global wave energy industry has great potential to contribute to the world’s energy needs. However, one of the key challenges in designing a wave energy converter (WEC) is the wave energy generator. Thus, this paper focuses on the optimal design of a cylindrical permanent magnet linear generator (CPMLG), which is used for the wave energy conversion system. To reduce the end effect and enhance the magnetic field performance of the CPMLG, the level-set method is applied to the design of the topology and size for the generator. In the paper, the objective air gap magnetic field is given by the mathematical analysis method and appropriate measuring points are predetermined. The measuring points can fully reflect the distribution characteristics of the air gap magnetic field. Then, topology evolution on the permanent magnet (PM) and yoke based on the level-set method are performed. The level set function corresponding to the initial shape of the PM is constructed. The algorithm is programmed and computed iteratively using the discrete time and space variables. Finally, the performances of the CPMLG with the updated PM and width of yoke are analyzed by ANSYS Maxwell. Results show that the magnetic field distortion and the unbalance of three-phase electromotive force (EMF) of the CPMLG is reduced by the optimization of the level-set method. It has also been verified that the designed CPMLG with the level-set method could be used for WEC at different wave conditions. |
| first_indexed | 2024-04-12T05:45:17Z |
| format | Article |
| id | doaj.art-5440a18365c646008acb718cd67f0cb9 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-12T05:45:17Z |
| publishDate | 2018-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-5440a18365c646008acb718cd67f0cb92022-12-22T03:45:28ZengMDPI AGEnergies1996-10732018-11-011111310910.3390/en11113109en11113109Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion SystemHong-wei Fang0Ru-nan Song1Zhao-xia Xiao2School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Electrical and Information Engineering, Tianjin University, Tianjin 300072, ChinaTianjin Key Laboratory of Advanced Electrical Engineering and Energy Technology, Tianjin Polytechnic University, Tianjin 300387, ChinaThe emerging global wave energy industry has great potential to contribute to the world’s energy needs. However, one of the key challenges in designing a wave energy converter (WEC) is the wave energy generator. Thus, this paper focuses on the optimal design of a cylindrical permanent magnet linear generator (CPMLG), which is used for the wave energy conversion system. To reduce the end effect and enhance the magnetic field performance of the CPMLG, the level-set method is applied to the design of the topology and size for the generator. In the paper, the objective air gap magnetic field is given by the mathematical analysis method and appropriate measuring points are predetermined. The measuring points can fully reflect the distribution characteristics of the air gap magnetic field. Then, topology evolution on the permanent magnet (PM) and yoke based on the level-set method are performed. The level set function corresponding to the initial shape of the PM is constructed. The algorithm is programmed and computed iteratively using the discrete time and space variables. Finally, the performances of the CPMLG with the updated PM and width of yoke are analyzed by ANSYS Maxwell. Results show that the magnetic field distortion and the unbalance of three-phase electromotive force (EMF) of the CPMLG is reduced by the optimization of the level-set method. It has also been verified that the designed CPMLG with the level-set method could be used for WEC at different wave conditions.https://www.mdpi.com/1996-1073/11/11/3109magnetic fieldlevel-set methodshape designvoltage unbalancewave energy conversion |
| spellingShingle | Hong-wei Fang Ru-nan Song Zhao-xia Xiao Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System Energies magnetic field level-set method shape design voltage unbalance wave energy conversion |
| title | Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System |
| title_full | Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System |
| title_fullStr | Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System |
| title_full_unstemmed | Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System |
| title_short | Optimal Design of Permanent Magnet Linear Generator and Its Application in a Wave Energy Conversion System |
| title_sort | optimal design of permanent magnet linear generator and its application in a wave energy conversion system |
| topic | magnetic field level-set method shape design voltage unbalance wave energy conversion |
| url | https://www.mdpi.com/1996-1073/11/11/3109 |
| work_keys_str_mv | AT hongweifang optimaldesignofpermanentmagnetlineargeneratoranditsapplicationinawaveenergyconversionsystem AT runansong optimaldesignofpermanentmagnetlineargeneratoranditsapplicationinawaveenergyconversionsystem AT zhaoxiaxiao optimaldesignofpermanentmagnetlineargeneratoranditsapplicationinawaveenergyconversionsystem |