Complex Impedance Matching for Power Improvement of a Circular Piezoelectric Energy Harvester
The impedance matching and the optimization of power from a circular piezoelectric energy harvester with a central-attached mass are studied. A finite element model is constructed to analyze the electrical equivalent impedance of the circular piezoelectric energy harvester. Furthermore, the complex conjugate matching load is used to extract the maximum output power of the energy harvester. The power output from complex conjugate matching load is compared with the power output from the resistive matching load and a constant resistance, separately. The results suggest that the complex conjugate matching can result in a significant increase of the output power for all frequencies. The effective bandwidth of the piezoelectric energy harvester is extended significantly.
circular piezoelectric energy harvester finite element analysis impedance matching
Hongyan Wang Xiaobiao Shan Tao Xie
State Key Laboratory of Robotics and System, Harbin Institute of Technology,Harbin, 150001, China Co State Key Laboratory of Robotics and System, Harbin Institute of Technology,Harbin, 150001, China
国际会议
大连
英文
169-172
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）