https://scholars.lib.ntu.edu.tw/handle/123456789/633652
標題: | Inductorless Synchronized Switch Harvesting Using a Piezoelectric Oscillator | 作者: | Lallart, Mickael WEN-JONG WU Yan, Linjuan Hung, Sheng Wei |
關鍵字: | Energy harvesting | piezoelectric devices | piezoelectric transducers | switched circuits | 公開日期: | 1-三月-2020 | 卷: | 35 | 期: | 3 | 來源出版物: | IEEE Transactions on Power Electronics | 摘要: | This paper proposes a preliminary investigation of a voltage inversion technique for enhancing the conversion abilities and power output of piezoelectric energy harvesting systems without requiring any inductance. Based on the use of an additional, decoupled high-frequency piezoelectric oscillator that is intermittently switched on the main harvesting piezoelectric element, the proposed scheme allows obtaining an inversion effect up to 30% experimentally (and possibly much higher) in an inductorless fashion. Such a concept is both discussed and validated theoretically and experimentally. Applied to energy harvesting, this provides an experimental gain of 30% in terms of harvested power compared to short-circuit switching. Also, the proposed scheme can be implemented in a single stage using off-the-shelf components (although being possibly integrated as well), while providing a better management of the charge transfer compared to pure switched capacitance approach, thanks to the motional branch of the oscillator. This therefore enables low-cost, integrable power boosting techniques for piezoelectric vibrational energy harvesters. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/633652 | ISSN: | 08858993 | DOI: | 10.1109/TPEL.2019.2925709 |
顯示於: | 工程科學及海洋工程學系 |
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