Microscale Solar Energy Harvesting for Wireless Sensor Networks based on Exponential Maximum power locking technique

Solar Energy is considered the densest source among ambient resources that is used in Energy Harvesting [1]. Power Management is a critical issue for the VLSI Design targeting different microscale modules. In this Work, Wireless Sensor Networks (WSN) is chosen to be the research application due to many problems. Normal batteries do not provide high energy densities, maintenance costs are very high due to WSN deployment issues. A New Technique, called Exponential Automatic Maximum power locking, is introduced here. The proposed technique locks on the maximum power of the PhotoVoltaic (PV) cell across large range of input light. It is based on the analytical derivation of the system equations with some approximations. The proposed design gives better approximation in terms of power and provides higher locking power range than previous techniques in the literature.