Experimental comparison of piezoelectric rectifying circuits for energy harvesting

Piezoelectric energy harvester extracts energy based on its load. In order to get optimum energy transfer, the optimum load must be connected directly to the piezoelectric. However, it is difficult to get optimum energy transfer from piezoelectric to the load. The promising solution is by designing the interface circuit with optimum impedance. This paper discusses the performance of various type of voltage multiplier. Both of this rectifier and power condition is used to provide optimum impedance to the piezoelectric for optimum energy harvesting process.