Improving functionality of vibration energy harvesters using magnets
In recent years, several strategies have been proposed to improve the functionality of energy harvesters under broadband vibrations, but they only improve the efficiency of energy harvesting under limited conditions. In this work, a comprehensive experimental study is conducted to investigate the us...
| Κύριοι συγγραφείς: | , , |
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| Άλλοι συγγραφείς: | |
| Μορφή: | Journal Article |
| Γλώσσα: | English |
| Έκδοση: |
2013
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| Διαθέσιμο Online: | https://hdl.handle.net/10356/83695 http://hdl.handle.net/10220/12923 |
| _version_ | 1826124949682651136 |
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| author | Tang, Lihua Yang, Yaowen Soh, Chee Kiong |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Tang, Lihua Yang, Yaowen Soh, Chee Kiong |
| author_sort | Tang, Lihua |
| collection | NTU |
| description | In recent years, several strategies have been proposed to improve the functionality of energy harvesters under broadband vibrations, but they only improve the efficiency of energy harvesting under limited conditions. In this work, a comprehensive experimental study is conducted to investigate the use of magnets for improving the functionality of energy harvesters under various vibration scenarios. First, the nonlinearities introduced by magnets are exploited to improve the performance of vibration energy harvesting. Both monostable and bistable configurations are investigated under sinusoidal and random vibrations with various excitation levels. The optimal nonlinear configuration (in terms of distance between magnets) is determined to be near the monostable-to-bistable transition region. Results show that both monostable and bistable nonlinear configurations can significantly outperform the linear harvester near this transition region. Second, for ultra-low-frequency vibration scenarios such as wave heave motions, a frequency up-conversion mechanism using magnets is proposed. By parametric study, the repulsive configuration of magnets is found preferable in the frequency up-conversion technique, which is efficient and insensitive to various wave conditions when the magnets are placed sufficiently close. These findings could serve as useful design guidelines when nonlinearity or frequency up-conversion techniques are employed to improve the functionality of vibration energy harvesters. |
| first_indexed | 2024-10-01T06:28:43Z |
| format | Journal Article |
| id | ntu-10356/83695 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:28:43Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/836952020-03-07T11:43:37Z Improving functionality of vibration energy harvesters using magnets Tang, Lihua Yang, Yaowen Soh, Chee Kiong School of Civil and Environmental Engineering In recent years, several strategies have been proposed to improve the functionality of energy harvesters under broadband vibrations, but they only improve the efficiency of energy harvesting under limited conditions. In this work, a comprehensive experimental study is conducted to investigate the use of magnets for improving the functionality of energy harvesters under various vibration scenarios. First, the nonlinearities introduced by magnets are exploited to improve the performance of vibration energy harvesting. Both monostable and bistable configurations are investigated under sinusoidal and random vibrations with various excitation levels. The optimal nonlinear configuration (in terms of distance between magnets) is determined to be near the monostable-to-bistable transition region. Results show that both monostable and bistable nonlinear configurations can significantly outperform the linear harvester near this transition region. Second, for ultra-low-frequency vibration scenarios such as wave heave motions, a frequency up-conversion mechanism using magnets is proposed. By parametric study, the repulsive configuration of magnets is found preferable in the frequency up-conversion technique, which is efficient and insensitive to various wave conditions when the magnets are placed sufficiently close. These findings could serve as useful design guidelines when nonlinearity or frequency up-conversion techniques are employed to improve the functionality of vibration energy harvesters. Accepted Version 2013-08-02T06:40:25Z 2019-12-06T15:28:14Z 2013-08-02T06:40:25Z 2019-12-06T15:28:14Z 2012 2012 Journal Article Tang, L., Yang, Y., & Soh, C. K. (2012). Improving functionality of vibration energy harvesters using magnets. Journal of Intelligent Material Systems and Structures, 23(13), 1433-1449. https://hdl.handle.net/10356/83695 http://hdl.handle.net/10220/12923 10.1177/1045389X12443016 en Journal of intelligent material systems and structures © 2012 The Author(s). This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of intelligent material systems and structures, the Author(s). It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1177/1045389X12443016]. application/pdf |
| spellingShingle | Tang, Lihua Yang, Yaowen Soh, Chee Kiong Improving functionality of vibration energy harvesters using magnets |
| title | Improving functionality of vibration energy harvesters using magnets |
| title_full | Improving functionality of vibration energy harvesters using magnets |
| title_fullStr | Improving functionality of vibration energy harvesters using magnets |
| title_full_unstemmed | Improving functionality of vibration energy harvesters using magnets |
| title_short | Improving functionality of vibration energy harvesters using magnets |
| title_sort | improving functionality of vibration energy harvesters using magnets |
| url | https://hdl.handle.net/10356/83695 http://hdl.handle.net/10220/12923 |
| work_keys_str_mv | AT tanglihua improvingfunctionalityofvibrationenergyharvestersusingmagnets AT yangyaowen improvingfunctionalityofvibrationenergyharvestersusingmagnets AT sohcheekiong improvingfunctionalityofvibrationenergyharvestersusingmagnets |