Abstract
A new solar automatic tracking system is designed in this paper. The system is a closed-loop servo system with a brushless DC servomotor and a photoelectric encoder etc. Firstly, the circuit schematic, the clock circuit, the servo driver and photoelectric encoder circuit are mainly analyzed. Then, the main program flow chart, and the time obtaining subroutine, the azimuth and elevation angle calculating subroutine and the motor drive subroutine are illustrated. Moreover, the servo system transmission mechanism is designed. It adopts a planetary reducer connected to a slewing drive. Finally, experiments results show the system can track the sun position in real time. It has high precision, low energy consumption, long life and perfect protective function etc.
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