In this paper a control algorithm for battery charger from a solar panel is proposed. This approach takes advantage of the maximum solar radiation received on the solar panel in the early and late hours of the day, because the control algorithm provides the optimum programmed current to the battery in these hours. In order to study and quantify the benefits of maximum current of charge tracking, the control algorithm constantly samples the solar panel output current-voltage under sunny sky conditions. Experimental results of the control algorithm implemented for fixed horizontal solar panel are presented.
This paper describes the design and implementation of a new digital dimming electronic ballast with the capability of being remotely controlled in a digital way, this is achieved through a novel lighting network based on Controller Area Network (CAN) bus standard. The proposed ballast was designed to drive a T5, 28 Watt s fl uorescent lamp. The proposed functional performance was tested using an implemented lighting network system based on CAN 2.0A bus specifi cation. The defi ned lighting network functions include dimming, turning on and off , and fault condition detection. The network control is made with a lighting system soft ware in a personal computer (PC) through one specifi c CAN node, being able to address up to 2047 individually controllable ballasts. According to the obtained results the proposed digital dimming electronic ballast performed the established functions successfully, meeting C class of the International Electrotechnical Commission (IEC) standard. The resulting system consists of a novel fully functional CAN bus lighting network with a reliable two wire remote control. Applications for this CAN Bus lighting network include lighting systems focused on design issues like lamp dimming control for electrical energy consumption savings and effi cient lamp maintenance. Such application areas cover building lighting management, precision lighting eff ects, and studio lighting.
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