Abstract

This paper presents a flexible energy harvesting system with an analog maximum power point tracking (MPPT) algorithm that operates using the output current. The proposed MPPT circuit is simplified as only one parameter needs to be measured and is implemented by fully analog design. Simulation and experiment results validate that the proposed MPPT algorithm has a tracking efficiency of 93.7% with a fast converging speed. The energy harvesting system is implemented and tested with a flexible solar panel, and thus can be used in wearable devices.

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