Solar Tracking Based On STC12C5A32S2Research On Controller

With concerns about environmental pollution and depletion of fossil energy, solar energy as a renewable clean energy gradually being valued by the people. However, the photoelectric conversion efficiency of solar energy is generally low. Tracking control technology can improve the conversion efficiency of solar energy, so the the biaxial memory tracking controller has conducted in-depth research, design based on the four-quadrant position memory tracking system to improve the conversion efficiency. The system has a high tracking accuracy, simple structure, easy to operate.Characteristics and requirements of the solar tracker, solar tracking controller circuit and procedures to achieve in depth research. The tracking part of the reduction gear in order to achieve a small power motor-driven tracking device, stepper motor driver is subdivided drive SH-203A, two stepper motors, respectively, the azimuth and elevation tracking. Tracking device installed two proximity switches in order to prevent in their daily work tracking system to the limit position, the motor is still lead to burn out the motor; another place the device reset, an interrupt request signal to the microcontroller, thereby allowing the stop the motor.To reduce power consumption, using the following measures. Closed track of time outside the single-chip A/D converter power supply to reduce energy consumption system can also reduce power consumption for the idle state; each time the stepper motor into the100pulses at once, so that did not send the pulse motor phase current will be reduced to half of the work.Control of electro-optical tracking and memory to track a combination of optical tracking mode and memory tracking mode can be switched in the tracking period. In this way not only to ensure the accuracy of the sun-tracking, and also avoid the weather adversely affected, but also can avoid the accumulated error caused by the clock tracking and other shortcomings. The system itself is low cost, widely used in solar photovoltaic system, the better to promote the value and application prospect.