Frequency control and phase surveillance in resonant electronic ballast

Soft-saturation magnetic cores, traditionally used in low current ripple application, are employed to build the inductor in HF resonant inverters to drive HPS lamps because no oversize is required to accept the over current and voltage during the resonant ignition transient. Soft-saturation core beh...

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Published inIECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society pp. 2929 - 2934
Main Authors Lopez, V. M., Navarro-Crespin, A., Branas, C., Azcondo, F. J., Schnell, R., Zane, R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2011
Subjects
Electronic ballasts
Ignition
Inductance
Inductors
Magnetic cores
Resonant inverters
Switching frequency
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Summary:Soft-saturation magnetic cores, traditionally used in low current ripple application, are employed to build the inductor in HF resonant inverters to drive HPS lamps because no oversize is required to accept the over current and voltage during the resonant ignition transient. Soft-saturation core behavior and lamp ignition states are modeled. A frequency control under phase surveillance (FCPS) is proposed during the ignition and steady state operation to assure zero-voltage-switch in the MOSFETs turn-on transients in resonant circuits and high output impedance to stabilize the lighting arc. The result is a reduction in the inductor size along with a reliable converter operation, paving the way for the resonant ballast to increase the switching frequency in high power applications.
ISBN:9781612849690
1612849695
ISSN:1553-572X
DOI:10.1109/IECON.2011.6119618