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학술지 An Efficient Energy and Power Manager for Autonomous Systems Based on Energy Harvesting
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저자
허세완, 이상균, 양일석
발행일
201409
출처
Analog Integrated Circuits and Signal Processing, v.81 no.1, pp.299-311
ISSN
0925-1030
출판사
Springer
DOI
https://dx.doi.org/10.1007/s10470-014-0386-x
협약과제
14PB1500, BLDC 모터용 고전압/대전류 파워모듈 및 ESD 기술개발, 양일석
초록
This paper describes the design of an energy and power manager for energy-harvesting devices consisting of four power converters operating in PFM mode for a low-energy and load current. The harvested energy can be maximized using a maximum power point tracking technique by a battery-charging converter, and stable voltages are generated and supplied to the charger and output loads by the other converters. These converters are optimized for high conversion efficiency with optimal switch sizes and an inductor peak current based on a numerical approach. For a further increase at a light load, the power management reduces the average bias current dynamically. It also controls the consumed or output power according to the operating condition. Using an IC fabricated in a 0.18혻μm process, we verified experimentally that the energy and power manager achieves high efficiency through an optimal design with a numerical approach, and through the power management, especially for a light load, and is therefore efficient for low-energy harvesting.
키워드
Energy harvesting, MPPT, Power management
KSP 제안 키워드
Autonomous system, Conversion efficiency(C.E.), Efficient energy, Energy Harvesting(EH), Energy and power, High conversion efficiency, Light load, Load current, Low energy, Maximum Power Point Tracking(MPPT), Operating conditions