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International Journal of Electrical, Electronic and Communication Sciences

ISSN: 2517-9438

Total 22 content found

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Electronic Tool that Helps in Learning How to Play a Flute

Year: 2009 Volume: 3 Issue: 10 1790 - 1792 Pages

Abstract: This paper describes the development of an electronic instrument that looks like a flute, which is able to sense the basic musical notes being executed by a specific user. The principal function of the instrument is to teach how to play a flute. This device will generate a significant academic impact, in a field of virtual reality interactive that combine art and technology. With this example is expected to contribute in research and implementation of teaching devices around the world.

Energy Recovery Soft Switching Improved Efficiency Half Bridge Inverter for Electronic Ballast Applications

Year: 2009 Volume: 3 Issue: 10 1785 - 1789 Pages

Abstract: An improved topology of a voltage-fed quasi-resonant soft switching LCrCdc series-parallel half bridge inverter with a constant-frequency for electronic ballast applications is proposed in this paper. This new topology introduces a low-cost solution to reduce switching losses and circuit rating to achieve high-efficiency ballast. Switching losses effect on ballast efficiency is discussed through experimental point of view. In this discussion, an improved topology in which accomplishes soft switching operation over a wide power regulation range is proposed. The proposed structure uses reverse recovery diode to provide better operation for the ballast system. A symmetrical pulse wide modulation (PWM) control scheme is implemented to regulate a wide range of out-put power. Simulation results are kindly verified with the experimental measurements obtained by ballast-lamp laboratory prototype. Different load conditions are provided in order to clarify the performance of the proposed converter.