Study on a Portable Apparatus for Energy Harvesting

• Main Authors: Kan, Shun-Tai, 甘順泰
• Other Authors: Huang, Yann-Chang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/01573535457272606036

碩士 === 正修科技大學 === 電機工程研究所 === 101 === Nowadays, the need for electronic products is increasing in a rapid. These electronic products are mostly powered by the electricity stored in the batteries. However, the life of battery is subject to the electric capacity of the battery and the output power of the battery is limited. As a result, this study proposes an energy harvesting system to resolve this issue. The main concept of this system is to convert the energy that is collected from the environment into electricity and store the electricity into secondary battery to provide electronic products enough power, and also increase the endurance of the battery to reduce charge times. Moreover, the system can self-charge under any environment and provide sufficient electricity for portable electronic devices. Therefore, the predicament of unable to find power supply when going outside can be avoided. The purpose of this study is to design an energy harvesting circuit that can convert the energy collected from the environment such as sun radiation or weak vibration into electricity, and the energy harvesting circuit can also be charged by primary batteries. The main goal is to provide electricity to portable electronic devices under any environment using this self-charging system. The secondary goal is to prolong the endurance of battery to reduce charge times. This study designs a voltage double rectifier and Self-excited oscillation boost charging circuit to obtain the energy collected from solar, vibration, and primary battery. The main concept of this design is to stores the collected energy in larger electricity container, and the voltage double rectifier and Self-excited oscillation boost charging circuit convert the energy into the battery. Experimental results show that the presented method is feasible and practical.