Design And Simulation Of The Solar Tracking System

Scientists generally accept that for mankind the solar energy is the fittest, the safest, the most green and the most ideal replaceable energy in future .The current solar energy converting rate roughly is 10%～20%.Analysis indicated that adopting the solar tracker can increase 37% the rate of receiving energy .Research and development of the two axes solar tracker can increase the reception efficiency and open widely the exploitation realm of the solar energy.The studying content in this paper is the design of the solar tracking system and its electric control system.The system can realize tracking to the solar azimuth and altitude angle in real time.We devised the position of the sun in celestial bodies, corresponding to design the two-dimensional position of the sun tracking devices and propose the real-time tracking control program by the use of PC/104. The system adopted active tracking, namely calculate the input angle of the tracking device in advance by use of the clock module which is in the control system, the angle is correspondent to the sun position some moment.Photoelectric encoders react the sunlight that putting on different position of the platform, feedback electrical signal.Then PC/104 applies the subprogram and sends out pulse to DC torque motors according to the signal, which can control the rotate angle and direction of the DC torque motor.The mechanism has realized the automatic track to the sun, so that the tracker's top flat board can be always vertical to the sunlight and arrive the furthest receiving energy.Systemic hardware select PC/104, it is used as control core to control the DC torque motor. We have finished the design of the peripheral hardware circuit of single-chip. This driver adopted the special composite module related to the DC torque motor. It has the character of strong anti-jamming, good performance of high frequency, simple construction and running steadily etc.