A novel two-stage electronic ballast for MH lamp with frequency modulation control

Chiang, C. K.; Liang, Tsorng–Juu; Liao, Hsuan; Lee, J. Y.; Cheng, Chun‐An; Chou, Kuan-Wen

doi:10.1109/ecce.2011.6064142

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Dimming Control Methods1

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“…In this application, a half-bridge series-parallel resonant converter is used because of its advantages [11][12][13][14] that are: low harmonics, minimum number of switches, high frequency operation, low acoustic noise and improved luminous efficacy.…”

Section: Dimming Control Methodsmentioning

confidence: 99%

Dimming control by variation of the switching frequency for high-intensity discharge lamps

Nehdi¹,

Elloumi²,

Nsibi³

et al. 2013

Lighting Research & Technology

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In this paper, a high-frequency dimmable electronic power supply for the highpressure sodium lamp is presented. The method includes a full bridge rectifier generating a dc-link voltage and a half bridge inverter to generate a frequency swept lamp power signal to drive the lamp while avoiding acoustic resonance. A dimming technique for a resonant circuit electronic ballast based on a variable frequency is introduced. In addition, the ability in the dimming range is demonstrated by experiments and simulation in order to verify the performance of the proposed circuit. A dimming range from 100% to 50% has been achieved. The efficiency is always higher than 89% and the ballast can accurately follow a fixed dimming plan.

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Section: Dimming Control Methodsmentioning

confidence: 99%