Title :
A Novel Integrated PWM Lighting System
Author :
Wang, Hung-Yu ; Lai, Yu-Hsuan ; Wu, Jhong-Jhou ; Lin, Yang-Chiuan
Author_Institution :
Electron. Eng., KUAS, Kaohsiung, Taiwan
Abstract :
Because of the crisis of global energy resources and global warming, many nations and enterprises are enthusiastic at developing the integrated scheme about making good use of renewable energy. In this paper a power-saving lighting system supplied with solar cell is proposed. The solar cell is used for electrical energy supplement and the generated energy is stored in power storage unit. The power storage unit is charged by pulse-width modulation (PWM) method. Through the PWM signal controlled by microcontroller, regulator and capacitance array, it balances and cushions the voltage between the solar cell and the power storage unit. It is helpful to the life-time extension of power storage unit. The LED array is used in the lighting system. The lighting system can detect the environmental brightness and control the brightness of LED array by PWM signal from the microcontroller. The experimental result is presented that confirm the power-saving prediction.
Keywords :
LED lamps; lighting; microcontrollers; renewable energy sources; solar cells; LED array; capacitance array; electrical energy supplement; enterprises; global energy resources; global warming; integrated PWM lighting system; microcontroller array; power storage unit; power-saving lighting system; pulse-width modulation method; regulator array; renewable energy; solar cell; Brightness; Light emitting diodes; Lighting; Photovoltaic cells; Power supplies; Pulse width modulation; Voltage control; Green energy; LED ligiting; PWM control; Solar cell;
Conference_Titel :
Electrical and Control Engineering (ICECE), 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-6880-5
DOI :
10.1109/iCECE.2010.631
