Nonlinear dynamic analysis of a reciprocative magnetic coupling on performance of piezoelectric energy harvester interfaced with DC circuit

Abstract

In this article, a nonlinear piezoelectric harvester coupled with a standard rectifying circuit is developed. Contrary to traditional Duffing-type magnetic harvester mechanism, the nonlinear effect in the system is induced by a dynamic tipmass with embedded magnet. Further, dynamic equation of the system is derived and subsequently, its equivalent circuit model is devised to evaluate its performance with a conventional harvester. Simulation and experimental results exhibit that the nonlinear effect due to the force coupling has a profound effect on peak output power and operational bandwidth of the harvester as compared to linear system with DC interface circuit.

Keywords:

• Reciprocative magnet
• vibration energy
• nonlinear harvester
• standard DC circuit

Disclosure statement

The authors declare that there is no conflict of interest.

Additional information

Funding

This work is supported in part by the National key Research and Development Program of China (Grant No. 2019YFB2006404), in part by the Fundamental Research Funds for the Central University (Grant No. 2242019K3DN05).