Design and Prototyping of a Cost-Effective Sun Tracking System for Photovoltaic Panels

The paper discusses the design and prototype build of a sun tracking system for photovoltaic panels, that consists of a slider-rocker mechanism and a controls system. The slider-rocker is optimized for best transmission angle properties, near linear input-output function and 180 degrees rocker travel. The control system includes three shaded light-dependent resistors pointing in different directions, and operational amplifiers to sense the imbalance in their illumination. The amplified imbalanced signal is used to control the linear motor of the slider-rocker mechanism towards minimizing this imbalance. A small scale prototype of the system has been built and tested successfully.Copyright © 2014 by ASME