| Summary: | 碩士 === 清雲科技大學 === 電機工程研究所 === 95 === The motion of the thesis is designing and implementing a lighting equipment of a solar energy white LEDs lamp. The system adopted a low price microcontroller(AVR) to digital control. It can output two signal of PWM to control boost converter,SEPIC converter and module of white LEDs separately. And the SEPIC converter is finished by the hardware(TL494) to accomplish output steady-state voltage and the result of saving energy. At front of the loop, boost converter, also used solar energy maximum power point tracking(MPPT), and makes the solar cell follow the different irradiance across boost converter to adjust duty cycle to get the maximum power of the solar cell. The storage energy equipment of this system is used ultracapacitor, its excellence is a electronic unit, small volume, light weight, and the coefficient of charge or discharge is better more than general battery. The load used white LEDs, because it needs small voltage and current to radiate and arrived at saving energy.
The control in this system is digitize, it combines storage energy of ultracapacitor and saving energy of white LEDs that can finish 5W system of the maximum power point traction, and it can do the result of instant generating power and supplying power. And finally, experiments are given to verify the theory.
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