The prevalence of electric discharge illumination has led us to consider ways to use discharge lamps for communication. This paper describes an optical transceiver system which transmits by modulating the lamp arc. The prototype power electronic lamp ballast uses a pulse frequency modulation scheme which ensures no perceptible flicker.

Abstract.A novel single-stage high-power-factor electronic ballast obtained from the integration of a forward dc-to-dc converter and a half-bridge resonant inverter is evaluated in this paper. The Forward converter is operated in discontinuous conduction mode and constant frequency providing an input power factor high enough to satisfy present standard requirements. The operation of the propose...

Electronic ballasts are designed to fulfill a variety of different input and output specifications depending on their end application and performance requirements. These designs typically include non-PFC, passive PFC and active PFC input stages, and, single, dual or multi-lamp output stages. The input voltage requirements for each design can vary significantly depending on the final application...

The demand of efficient lighting is increasing day by day. The efficient lighting includes maximum efficacy of light as well as maximum utilization of energy by improving the power factor with less complexity. The discharge lamps with high frequency electronic ballasts are used for maximum efficient lighting. The power factor of the ballast which is used in fluorescent lamp circuit should be in...

Electrical Engineering (ABSTRACT) In a conventional electronic ballast for a fluorescent lamp, inductor-capacitor-transformer tank circuit is used. A Piezoelectric Transformer (PT) can potentially be used to replace such a tank circuit to save space and cost. In the past, ballast design using a PT requires selecting a PT from available samples which are normally not matched to specific applicat...

Fluorescen t power SUPPlY Dimmer I Electronic bal last I Lamp IAn electronic ballast for fluorescent lamp lighting using a new resonant inverter is proposed. The electronic ballast has high efficiency, light wcight and small sizc bccause the resonant inverter operates at high frequencies with low switching losses. The inverter output power can be continuously controlled by regulating the L-C re...

Compact fluorescent emergency luminaires present unique challenges. Not only must the emergency gear and ballast be crammed into small confines of the luminaire but there is the additional problem of excessive temperature to deal with. This paper describes the design of an optimal electronic ballast/emergency control unit specifically aimed at the South African market where the traditional swit...

The steady-state oscillation of a zero-voltageswitching clamped-voltage self-oscillating ballast driven by a saturable transformer is analyzed and simulated. Its selfoscillating operation is divided into six stages according to the hysteresis B–H loop of saturable transformer cores. Stage-wise circuit analysis shows the saturable transformer limits the lamp current and dominates the switching f...

This paper presents analytical tools aimed at improving and simplifying the development of frequency-controlled dimming electronic ballasts. A modified phasor transformation is proposed that converts a frequency-modulated signal into an equivalent time-varying phasor. The proposed transformation is applied to develop a complete small-signal phasor model of the LCC resonant ballast, which explic...

=AbstractSingle-stage current-source charge-pump powerfactor-correction (SS CS-CPPFC) electronic ballast employs charge-pump concept to obtain high power factor with low cost. However, the circuit has a poor lamp current crest factor and large lamp output power variation, which deteriorates the lamp life. Feed-forward and/or feedback circuit are usually used to deal with these problems at the p...