Analysis of power electronic interface for capacitive MEMS energy harvesters

摘要

This paper presents an alternative to electrical configuration of capacitive energy harvesters with multiple transducers. The configuration is constructed to combine all the transducer outputs into a single output and performs identically to the linear two-port model. Further development of a power electronic interface circuit is investigated by circuit simulation. The circuit is used to convert the AC outputs of the harvester to a DC voltage and has a tunable resistive input impedance. The introduced topology shows a significant improvement in comparison with the conventional circuit using a full bridge rectifier. The maximum output power is two times higher when the losses of electronic components are taken into account.