Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Herbert Maurizio Cardarelli

Bernhard Roellgen

Matthias Burkhardt

A rod-core transformer for use as a starting transformer in the cap of a high-pressure discharge lamp for a motor vehicle headlight. The rod-core transformer has at least two cores ( ) which are in the form of rods and are arranged alongside one another, and on each of which a multilayer secondary winding ( ) is wound, with the respective layers ( ) and ( ) being connected in parallel and being arranged one above the other without any offset. Furthermore the secondary windings ( ) are electrically conductively connected to one another, with their total resistance being at most 2&OHgr;. The transformer is particularly highly suitable for use as a starting transformer for high-pressure discharge lamps with a low operating voltage, for example halogen metal-vapor high-pressure discharge lamps which do not contain mercury.

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Munich, Germany

Herbert Maurizio Cardarelli