DocumentCode :
2598863
Title :
Photovoltaic energy harvester for micro-scale applications
Author :
Waltisperger, Guy ; Condemine, Cyril ; Basrour, Skandar
Author_Institution :
LETI Dept., Minatec, Grenoble, France
fYear :
2010
fDate :
20-23 June 2010
Firstpage :
177
Lastpage :
180
Abstract :
New micro-systems like ad-hoc wireless transceiver micro-sensors continue to integrate more and more functionalities in smaller packaging size. This size reduction has many benefits and opens new application areas but it deeply constrains the amount of power embedded and tends to require a smart power management unit. One issue to achieve longer life time is the use of renewable energy sources (solar, thermal, or kinetic). Number of challenges need to be overcome in order to convert efficiently the energy harvested. This paper proposes a novel photovoltaic DCDC converter circuit with two feedback loops. It harvests energy from various solar conditions (indoor and outdoor) by imposing the harvester to work close to its maximum power point. Furthermore when the solar harvester is activated, the load can directly be supplied by solar energy through a new regulated power path, otherwise the energy go through the accumulator. Simulations in the UMC 180nm technology process show that the circuit can harvest energy from indoor to outdoor conditions, with a power consumption below 10μW, equivalent to an efficiency rising up to 82%.
Keywords :
DC-DC power convertors; energy harvesting; microsensors; transceivers; ad-hoc wireless transceiver microsensor; kinetic energy; microscale application; photovoltaic DCDC converter circuit; photovoltaic energy harvester; renewable energy source; size 180 nm; solar energy; thermal energy; Capacitors; Converters; Hysteresis; Mathematical model; Power demand; Sensors; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
NEWCAS Conference (NEWCAS), 2010 8th IEEE International
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4244-6806-5
Electronic_ISBN :
978-1-4244-6804-1
Type :
conf
DOI :
10.1109/NEWCAS.2010.5603752
Filename :
5603752
Link To Document :
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