Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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A New Vibration Energy Harvester Using Magnetoelectric Transducer

  • Yang, Jin (Key Laboratory for Optoelectronic Technology & Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University) ;
  • Wen, Yumei (Key Laboratory for Optoelectronic Technology & Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University) ;
  • Li, Ping (Key Laboratory for Optoelectronic Technology & Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University) ;
  • Dai, Xianzhi (Key Laboratory for Optoelectronic Technology & Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University) ;
  • Li, Ming (Key Laboratory for Optoelectronic Technology & Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University)
  • Received : 2011.02.25
  • Accepted : 2011.04.14
  • Published : 2011.06.30
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Abstract

Magnetoelectric (ME) transducers were originally intended for magnetic field sensors but have recently been used in vibration energy harvesting. In this paper, a new broadband vibration energy harvester has been designed and fabricated to be efficiently applicable over a range of source frequencies, which consists of two cantilever beams, two magnetoelectric (ME) transducers and a magnetic circuit. The effects of the structure parameters, such as the non-linear magnetic forces of the ME transducers and the magnetic field distribution of the magnetic circuit, are analyzed for achieving the optimal vibration energy harvesting performances. A prototype is fabricated and tested, and the experimental results on the performances show that the harvester has bandwidths of 5.6 Hz, and a maximum power of 0.25 mW under an acceleration of 0.2 g (with g = $9.8\;ms^2$).

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References

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