Efficient Energy Output Under Low Impedance for High‐Impedance Generators

ABSTRACT Highly efficient, low‐frequency (<2 Hz) high‐impedance generators convert ambient mechanical energy to electrical energy; however, their high internal impedance causes most of the voltage to drop internally, limiting energy delivery to low‐impedance loads. Herein, we propose a theoretical framework for a novel single‐input, multi‐output (SIMO) switched‐capacitor circuit designed to overcome this impedance mismatch and achieve a high output energy at low impedance. When integrated with an alternating‐current dielectric generator (AC‐DEG), the system attains an ultra‐low optimal matching impedance of 280 Ω, delivering an energy output of 3.37 mJ (1685 mJ/m 2 ) per cycle and a short‐circuit charge output of 1.21 mC (605 mC/m 2 ) per cycle. Through reconfiguring output paths, the energy transfer efficiency can exceed 50%—far outperforming other energy management strategies. We demonstrate that this energy management strategy enables practical applications in powering low‐impedance electronic devices such as motors and batteries, paving the way for advanced self‐powered systems.