期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 38, 期 10, 页码 13166-13180出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2023.3296709
关键词
Dual-stage electrode; electret; energy harvesting; power management circuit; synchronous electric charge extraction (SECE)
This article presents the development of a self-powered synchronous electric charge extraction (SECE) circuit for an in-plane rotational electret kinetic energy harvester with a cold start function. The circuit is able to provide higher output power compared to conventional buck converters.
This article presents for the first time the development of a self-powered synchronous electric charge extraction (SECE) circuit for an in-plane rotational electret kinetic energy harvester (EH) with a cold start function. As an electret EH features low source current and high output impedance, its output power is sensitive to the leakage current and the parasitic capacitance. A novel dual-stage electrode design is proposed, with the control stage providing a sub-5V supply to the control circuit and triggering a synchronous switch in the high-voltage main circuit. Compared to a conventional buck converter, the power harvested on a 5-V load was doubled with the present synchronous electric charge extraction (SECE) prototype. Based on the circuit simulations, the achievable power increase at the generator output with the proposed circuit is mainly constrained by the impedance introduced by itself. The experimental results show that the circuit can be cold-started and directly powered by electret EHs.
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