It is presented a novel electronic ballast to drive dual automotive high-intensity-discharging (HID) lamps. Two flyback converters are used to provide the lamp power from the warm-up period through the steady state. A common-leg bridge inverter is used to drive the two lamps with a low- frequency square-waveform operation. The lamps are driven with negative lamp voltage to increase lamp life. Also, the electronic ballast is controlled by a micro-control unit (MCU). The start-up sequences and constant lamp power control of the lamps are achieved by a digital signal processor (DSP). The characteristics of a lamp during the transition and steady-state periods are described. Finally, a laboratory prototype of a 35W D1-type automotive electronic ballast has been implemented to verify the feasibility of this approach.
Design and implementation of a DSP-based electronic ballast for dual xenon headlight lamps
Entwurf und Implentierung eines elektronischen Vorschaltgeräts mit DSP für Dual-Xenon-Scheinwerfer
2008
7 Seiten, 19 Bilder, 1 Tabelle, 5 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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