A triboelectric nanogenerator energy harvesting system based on load-aware control for input power from 2.4 mu W to 15.6 mu W
- Authors
- Rawy, Karim; Sharma, Ruchi; Yoon, Hong-Joon; Khan, Usman; Kim, Sang-Woo; Kim, Tony Tae-Hyoung
- Issue Date
- Aug-2020
- Publisher
- ELSEVIER
- Keywords
- Energy harvesting; Maximum power point tracking (MPPT); Power conversion efficiency; Power management circuits; Triboelectric nanogenerator (TENG)
- Citation
- NANO ENERGY, v.74
- Journal Title
- NANO ENERGY
- Volume
- 74
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/87378
- DOI
- 10.1016/j.nanoen.2020.104839
- ISSN
- 2211-2855
- Abstract
- This paper presents a triboelectric nanogenerator (TENG) energy harvesting system for ultra-low power applications. We propose a load-aware control algorithm to improve the power conversion efficiency as well as the voltage conversion efficiency. The control algorithm minimizes the conduction and switching losses within a switched capacitor charge pump (SCCP) by modulating its switching frequency based on the load condition. Furthermore, a hysteresis input regulation control was developed for preventing breakdown. The overall system was optimized by utilizing a compact spice model from the physical mechanisms of the employed TENG. The fabricated test chip in 65-nm process technology provides a regulated output voltage of 1.2 V with power conversion efficiency of 88% at 30 Hz excitation frequency when the TENG output voltage is 2.5 V.
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