A Compact Multi-Input Power Conversion System with High Time-Efficiency Inductor�VSharing Technique for Thermoelectric Energy Harvesting Applications
Journal
Journal of Circuits, Systems and Computers (JCSC)
Pages
19-27
Date Issued
2016
Author(s)
Abstract
A compact multi-input thermoelectric energy harvesting system implemented in a 0.18μm CMOS technology is proposed to extract electrical energy from human body heat. By combining the techniques on inductor sharing and bidirectional power converter, the harvesting-and regulating-stage circuits in conventional energy harvesting system can be merged into a single-stage circuit. With the proposed duty-cycle-based strategy for maximum power extraction and the high-efficiency timing scheme for inductor sharing, the proposed multi-input thermoelectric energy harvesting system can ensure optimal power transfer from each thermoelectric energy source without sacrificing power conversion efficiency (PCE) and maximum output power capability. The peak PCE is achieved at 58.5%, the maximum end-to-end output power is 2.43mW, and the maximum output power capability is 32.4mW while the storage capacitor is fully charged. © 2016 World Scientific Publishing Company.
Subjects
Energy harvesting; inductor sharing; multi-input single output (MISO) power converter; thermoelectric generator
SDGs
Other Subjects
CMOS integrated circuits; Energy efficiency; Energy harvesting; Bi-directional power converter; Energy harvesting systems; High time efficiency; Maximum output power; Maximum power extractions; Optimal power transfer; Power conversion efficiencies; Thermoelectric energy; Electric inductors
Type
journal article