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1742 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: REGULAR PAPERS, VOL. 55, NO. 6, JULY 2008 An Adaptive System for Optimal Solar Energy
 

Summary: 1742 IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS--I: REGULAR PAPERS, VOL. 55, NO. 6, JULY 2008
An Adaptive System for Optimal Solar Energy
Harvesting in Wireless Sensor Network Nodes
Cesare Alippi, Fellow, IEEE, and Cristian Galperti
Abstract--The success of wireless sensor networks and their
pervasive use is somehow constrained by energy supply which,
generally provided by batteries, is a finite resource. Energy har-
vesting mechanisms must hence be taken into account to grant a
long time operational life, with solar energy being the most inter-
esting one in outdoor deployments due to its relatively high power
density. In this paper we propose a low-power maximum power
point tracker (MPPT) circuit specifically designed for wireless
sensor nodes (hence effective, flexible, low cost and power-aware),
i.e., a power transferring circuit for optimally conveying solar
energy into rechargeable batteries even in not optimal weather
conditions. High efficiency is granted by an ad hoc adaptive
algorithm which, by keeping the MPPT electronics in its optimal
working point, maximizes energy transfer from the solar cell
to the batteries. The suggested implementation is particularly
effective in critical weather conditions where traditional solutions

  

Source: Alippi, Cesare - Dipartimento di Elettronica e Informazione, Politecnico di Milano

 

Collections: Computer Technologies and Information Sciences