Implementation of AC-DC Boost Converter for Low Power Energy Harvesting

摘要

In this paper, a direct ac-dc power electronic converter topology is proposed for efficient and optimum energy harvesting from low-voltage micro generators. Such micro generators are typically spring-mass systems, in which mechanical energy is converted to electrical energy by electromagnetic damping. The output of an inertial micro generator is typically around a few hundred milli-volts of ac. In such low-power applications, the power consumption of gate drive and control circuits should be minimal. The fundamental principle behind the proposed topology is the use of two boost converters, each operating in one half cycle of the ac voltage. Simulation results are given to validate the efficiency analysis.