Use of Chaotic Switching in Electronic Ballasts(Nonlinear Phenomena)(<Special Section>Nonlinear Theory and its Applications)
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概要
- 論文の詳細を見る
This paper investigates the use of chaotic pulsewidth modulation (CPWM) scheme for electronic ballasts to eliminate visible striations (appearance of black and white hands along the lamp tube) in fluorescent lamps. As striations can he eliminated by superimposing a small amount of dc current or low frequency ac current to the electrodes to produce composite current waveform through the lamp, the underlying principle of this work is based on the fact that the power spectral density of the lamp current will be rich of low-frequency harmonics at the output of inverters switching with CPWM. Most importantly, the lamp life will not be affected with chaotic switchings, because the lamp current crest factor is found to be similar to the one with standard pulsewidth modulation (PWM) and the lamp current does not have dc component. The effectiveness of eliminating striations is confirmed experimentally with a T8 36W prototype.
- 社団法人電子情報通信学会の論文
- 2003-09-01
著者
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Chung Henry
Department Of Electronic Engineering City University Of Hong Kong
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Lee Stephen
Department Of Horticulture Oregon State University
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Lee Stephen
Department Of Electronic Engineering City University Of Hong Kong
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Chen Guanrong
Department Of Electronic Engineering City University Of Hong Kong
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Chen Guanrong
Department Of Electrical And Computer Engineering University Of Houston
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HUI S.
Department of Electronic Engineering, City University of Hong Kong
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