Abstract
This paper presents the design, control strategy and experimental results of a two-step, power factor correction stage (PFC) and resonant inverter (RI), electronic ballast proposal to supply 150 W electrodeless fluorescent lamps (EFL). The PFC acts as a controlled power source and provides mid and long-term stability to the system, while the stability of the current through the lamp is achieved with the RI. In addition, the power-mode control requires limitation of the output voltage. The dual operation mode of the PFC (voltage source mode and power source mode) enables an efficient soft resonant ignition and the implementation of simple dimming regulation.
Highlights
electrodeless fluorescent lamps (EFL) lamps are comparable to light-emitting diode (LED) lamps in terms of light output, color reproduction, lifetime and scotopic/photopic ratio (S/P ratio)
A two-stage electronic ballast controlled in power source mode and limited in voltage for
A two-stage electronic ballast controlled in power source mode and limited in voltage for EFL
Summary
The use of lighting systems represents a large percentage of world energy consumption [1]. BVMvoltage that uses thecurrent lamp power, thecomponents lamp light level, the control variable, avoiding and spikeswith that closer could relation damageto the of theasballast as variable, avoiding voltage and current spikes that could damage the components of the ballast as well well as any flicker effect. EFLs are discharge lamps that do not require electrodes to ionize the internal gas of the vacuum tube, so exciting internalachieved gas in the dischargeelements They eventually are formedbecomes by one conductive or several which is instead achieved by magnetic elements. This250 paper around kHz.presents a ballast design to supply EFL lamps of this second type, which has two external coils, working. The following section describes the proposed ballast solution and the control system control system used to supply the EFL lamp in its different operating modes.
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