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A Loss-Free Resistor-Based Versatile Ballast for Discharge Lamps

Department of Electrical, Electronic, and Automatic Control Engineering (DEEEA), Universitat Rovira i Virgili, 43007 Tarragona, Spain
Author to whom correspondence should be addressed.
Energies 2019, 12(7), 1403;
Received: 4 March 2019 / Revised: 5 April 2019 / Accepted: 7 April 2019 / Published: 11 April 2019
(This article belongs to the Special Issue Sliding Mode Control of Power Converters in Renewable Energy Systems)
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This paper presents a versatile ballast for discharge lamps, whose operation is based on the notion of a loss-free resistor (LFR). The ballast consists of two stages: (1) a boost converter operating in continuous conduction mode (CCM) and exhibiting an LFR behavior imposed by sliding-mode control; and (2) a resonant inverter supplying the discharge lamp at high frequencies. Thanks to this mode of operation, the power transferred to the lamp is regulated by the LFR input resistance, allowing successful ignition, warm-up, nominal, and dimming operation of a range of discharge lamps, with no need for complex regulation schemes based on lamp models. The versatility of the ballast has been experimentally proven for both conventional and electrodeless discharge lamps. Tests include induction electrodeless fluorescent (IEFL), high-pressure sodium (HPS) vapor, and metal-halide lamps. View Full-Text
Keywords: Induction Electrodeless Fluorescent Lamps (IEFL); High-Intensity Discharge Lamps (HID); sliding-mode control; loss-free resistor (LFR) Induction Electrodeless Fluorescent Lamps (IEFL); High-Intensity Discharge Lamps (HID); sliding-mode control; loss-free resistor (LFR)

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Valderrama-Blavi, H.; Leon-Masich, A.; Olalla, C.; Cid-Pastor, À. A Loss-Free Resistor-Based Versatile Ballast for Discharge Lamps. Energies 2019, 12, 1403.

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