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US 2003/0173912 A1Published application
Circuit arrangement for igniting high pressure discharge lamps
AssigneePatent-Treuhand-Gesellschaft Fur Elektrische Gluhl
InventorsAndreas Huber, Friedrich Witzani
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Abstract
Circuit arrangement for igniting high-pressure discharge lamps by means of resonance ignition by a resonant circuit. According to the invention, the voltage for an auxiliary ignition electrode is provided by an ignition transformer into which the voltage is fed via an inductor of the resonant circuit. The inductor of the resonant circuit preferably forms the primary winding of the ignition transformer.
Claims5
A circuit arrangement for igniting high-pressure discharge lamps, having the following features:
- an auxiliary ignition electrode terminal
- a first and a second lamp terminal, and
- a resonant circuit, comprising the series circuit of a resonance inductor and a resonance capacitor at whose connecting point there is formed a resonant circuit midpoint that is coupled to the first lamp terminal, while the second lamp terminal is coupled to the terminal of the resonance capacitor averted from the resonant circuit midpoint,
- characterized by the following features:
- an ignition transformer with a primary and a secondary winding, the voltage that is present across the resonance inductor being fed into the primary winding, and
- the auxiliary ignition electrode terminal is coupled to a first terminal of the secondary winding of the ignition transformer.
3 more elements
Dependencies are inferred from the claim text.