Application of Improved Synchronized Electric Charge Extraction Circuit to Piezoelectric Energy Harvesting Induced by Magnetic Plucking

• Main Authors: Po-Hao Huang, 黃柏豪
• Other Authors: 舒貽忠
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/qhj7v8

碩士 === 國立臺灣大學 === 應用力學研究所 === 107 === The thesis develops an improved SECE (synchronized electric charge extraction)　interface circuit suitable for extracting energy from a rotary magnetic plucking dynamic system. Indeed, the device consists of a piezoelectric cantilever beam fixed on a stationary base and attached to an SECE circuit. A tip magnet is excited by a rotating magnet, giving rise to harvesting energy by non-contact magnetic plucking. The proposed improved SECE circuit allows the piezoelectric voltage exceeding 20 Volt, and therefore, harvested energy is enhanced in comparison with our previous result. Finally, the experimental results are found in good agreement with the theoretical predictions, confirming the superiority of the improved SECE circuit over the standard interface circuit. In addition, another advantage using the SECE technique is the enlargement of bandwidth in the rotary frequency response.