Charge Pump System for Energy Harvesting in Low Voltage and Low Frequency Applications

In this paper, we proposed charge pump system designed specifically for energy harvesting at low voltage and low frequency, focusing on the twistron, a carbon nanotube yarn-based harvester. The whole system is composed of a transformer, a voltage doubler, and the charge pump system. Through simulations, we demonstrate that the charge pump system is capable of generating output voltage from 3.97 V to 4.47 V for the load resistance with 10 kΩ 1 MΩ when the input voltage of the charge pump system is set to 1.03 V. The measured power conversion efficiency (PCE) reaches up to 79%.