TY - GEN
T1 - Contactless Electronic Ballast for High Brightness LED Lamps with Mechanical Dimming Method
AU - Qu, Xiaohui
AU - Wong, Siu-Chung
AU - Tse, Chi K.
AU - Wu, Zaijun
PY - 2012/6
Y1 - 2012/6
N2 - Advanced techniques in light-emitting-diode (LED) light sources allow LED lighting to appear in more and more applications. Besides providing the constant driving current source, LED ballast is usually isolated for safety specifications and dimmed for energy saving. Normally, LED ballast is designed with transformer for isolation and external circuits for dimming, increasing the challenges and complexity of the ballast design. To overcome the above limitations, this paper proposed a non-electrical dimming method based on a contactless transformer, taking full use of the transformer parasitical parameters to transfer energy by resonance. By adjusting the transformer air gap mechanically, the parameters in the resonance tank will change sensitively, which can be used for dimming control without additional components and control. In some extreme conditions, the proposed ballast provides a total environmentally-shield secondary enclosure with contactless transformer. Analysis, design example and prototype verification are given for the LED ballast and dimming control. © 2012 IEEE.
AB - Advanced techniques in light-emitting-diode (LED) light sources allow LED lighting to appear in more and more applications. Besides providing the constant driving current source, LED ballast is usually isolated for safety specifications and dimmed for energy saving. Normally, LED ballast is designed with transformer for isolation and external circuits for dimming, increasing the challenges and complexity of the ballast design. To overcome the above limitations, this paper proposed a non-electrical dimming method based on a contactless transformer, taking full use of the transformer parasitical parameters to transfer energy by resonance. By adjusting the transformer air gap mechanically, the parameters in the resonance tank will change sensitively, which can be used for dimming control without additional components and control. In some extreme conditions, the proposed ballast provides a total environmentally-shield secondary enclosure with contactless transformer. Analysis, design example and prototype verification are given for the LED ballast and dimming control. © 2012 IEEE.
KW - contactless transformer
KW - LED ballast
KW - LED dimming
KW - resonance circuit
UR - http://www.scopus.com/inward/record.url?scp=84866781136&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84866781136&origin=recordpage
U2 - 10.1109/IPEMC.2012.6258907
DO - 10.1109/IPEMC.2012.6258907
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781457720864
SN - 9781457720857
SN - 9781457720888
VL - 1
T3 - Conference Proceedings - IEEE International Power Electronics and Motion Control Conference - ECCE Asia, IPEMC
SP - 443
EP - 447
BT - Conference Proceedings - 2012 IEEE 7th International Power Electronics and Motion Control Conference - ECCE Asia
T2 - 7th IEEE International Power Electronics and Motion Control Conference - ECCE Asia (IPEMC 2012)
Y2 - 2 June 2012 through 5 June 2012
ER -
