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| Structural Design and Simulation of Micro Electromagnetic Vibration Energy Harvester |
| Zhao Zhigang, Ding Xusheng, Liu Fugui, Yang Zhuomeng |
| Province-Ministry Joint Key Lab of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin 300130 China |
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Abstract Along with the rapid development of large scale integrated circuits, wireless sensor networks and the farther research on micro electro mechanical system (MEMS) technology, MEMS-based micro power has wide application prospects. As a branch of micro power supply, micro electromagnetic vibration energy harvester can convert vibration energy prevalent in the environment into electrical energy, which can be used as a long-term effective supply for the sensor devices. The physical model and working principles of vibration energy harvester is simply described. The vibration characteristics of the harvester under sinusoidal excitation are studied. The vibration form and natural frequencies of the harvesters’ structure are analyzed, and structural optimization is proposed by means of the finite element method. A composite structure of vibration energy harvester is presented; the output efficiency is greatly improved compared to traditional single magnet structure.
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Received: 21 February 2011
Published: 20 March 2014
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2012, Vol. 27 
