@article{Chan:2004:10.1109/LPEL.2004.838777,
author = {Chan, SSM and Chung, HSH and Hui, RSY},
doi = {10.1109/LPEL.2004.838777},
journal = {IEEE Power Electronics Letters},
pages = {87--91},
title = {Self-oscillating dimmable electronic ballast for fluorescent lamps},
url = {http://dx.doi.org/10.1109/LPEL.2004.838777},
volume = {2},
year = {2004}
}

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TY  - JOUR
AB  - This letter presents a low-cost solution for converting the popularly adopted nondimmable electronic ballast circuit for fluorescent lamps with self-oscillating series resonant inverter into a dimmable one. The dimming function is achieved by increasing the switching frequency of the inverter from the natural frequency of the resonant tank, so that less energy is coupled to the lamp. Control of the switching frequency is based on deriving an adjustable dc current source from the inductor in the resonant tank to control the operating point of the saturable chokes for driving the switches in the inverter. The overall circuit does not require any integrated circuit. A 17-W prototype has been built and tested. Theoretical predictions have been verified with experimental results. The lamp can be dimmed to 10% of the full brightness.
AU  - Chan,SSM
AU  - Chung,HSH
AU  - Hui,RSY
DO  - 10.1109/LPEL.2004.838777
EP  - 91
PY  - 2004///
SN  - 1540-7985
SP  - 87
TI  - Self-oscillating dimmable electronic ballast for fluorescent lamps
T2  - IEEE Power Electronics Letters
UR  - http://dx.doi.org/10.1109/LPEL.2004.838777
VL  - 2
ER  - 

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