The Modeling Simulation And Design Of Hybrid Uniaxial Sun Automatic Tracking System

As an emerging green clean energy, solar has the advantages of cleaning,harmlessness and universality, meanwhile, there is still a discontinuous light intensity,strong nonlinear and not easy to store such as faults. Therefore, how to raise theutilization ratio of solar maximum is becoming a hot spot of current applicationresearch at home and abroad. According to the hot issues of the low utilization rate ofsolar energy application, a sun automatic tracking system with high accuracy hasbeen designed in this paper. The absorption of solar energy can be maximized and theproblem of the low utilization rate of solar energy in actual application has beensolved by this system, The research work of this paper mainly includes the followingaspects:Firstly, the current overseas and domestic research status of sun automatictracking system has been analyzed, the hybrid tracking mode which is thecombination of solar trajectory tracking and photoelectric tracking, the axialplacement of north-south horizontal axis and east-west tracking and the efficientbrushless dc motor(BLDCM) was selected. The high precision tracking algorithmwas selected as the tracking algorithm of this system.Secondly, the control principle of brushless dc motor driving system wasanalyzed, and the mathematical model of the ontology and double closed-loop controlsystem of BLDC was established in matlab/simulink. The mathematical model of thecontrol part of sun automatic tracking system (main control system and slave controlsystem) was designed to verify the running performance of the tracking system.Thirdly, Freescale DSP was used to be the main control chip. The hardwarecircuit design of this system including the voltage conversion module, DSP controlmodule, communication module, sensors collection module and the power switchdriving module were completed. The software control algorithm of the main controlsystem and slave control system was designed, and the man-machine interface of thissystem was projected in order to realize the communication requirement between thesystem and a PC. Lastly, according to the simulation and experimental, a good controlperformance has been achieved by the proposed control algorithm of this paper. Onthe premise of guaranteeing the high reliability and anti-jamming, the sun automatictracking system based on brushless dc motor designed in this paper still has strongcontrol precision and tracking accuracy.