Intelligent Load Power Manager for Solar Powered Portable Devices

Abstract

The performance of real time solar energy converters and solar energy scavenging devices depends solely upon the speed and efficiency of the power management among the input, output and conversion ends. Hence this paper concentrates on designing of reconfigurable, reprogrammable, efficient Intelligent Load Power Manager (ILPM) system depicting low power, high precision and zero lag operation. (FPGA) Field Programmable Gate Arrays prove to be robust, low cost, high efficient methodology that works well in analog as well as in digital platform. Hence, FPGA based implementation of an Intelligent Load Power Manager (ILPM) is proposed for solar energy harvesting portable / remote devices. The input renewable power is stepped up with help of the DC DC Converter and the boosted voltage is given as input to the portable load. Since the harvested energy is not regular throughout the load requirement, a storage setup is made to meet up the lad needs. FPGA based ILPM proves to be an energy efficient module which controls the connectivity of the load needs and operation of the converter.Simulation and implementation of the Proposed FPGA based ILPM is done with Xilinx software 12.1 version.The dynamic power consumption of the proposed ILPM is found to be low. The obtained simulation output shows a comparative higher efficiency (96.2%), a decrease in chip area usage 130 µm²and reduction in operation time as 4.283ns.

Keywords: Solar Energy Scavenging, Power Manager, FPGA, chip area, DC-DC Converter.