Epcos Ag

Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Bernhard Roellgen

Martin Neudecker

Herbert-Maurizio Cardarelli

Matthias Burkhardt

Herbert Maurizio Cardarelli

A coil is specified which has at least four electrical conductors, wherein the electrical conductors are wound around a common winding center. Each of the at least four electrical conductors is at a constant distance from the winding center of the coil over the entire length of the coil.

Coil and method for producing a coil

A high-frequency swinging choke has at least two rod cores arranged next to one another in the longitudinal direction. The rod cores each have at least one winding. The windings are connected in series.

High-frequency swinging choke

An arrangement for measuring a current flowing in an electrical conductor includes a magnetic circuit, for coupling to the electrical conductor, the magnetic circuit has an air gap. A magnetic field-sensitive component that serves for measuring the magnetic field generated by the electrical conductor is situated between the arms of the magnetic circuit. Two control cores are arranged in the air gap of the magnetic circuit. The control cores each include a control winding for magnetically saturating the respective control core and are arranged on both sides of the electrical conductor.

Arrangement and method for measuring a current flowing in an electrical conductor

An arrangement and a method are used for measuring current flowing in an electrical conductor with a magnetic circuit that has an air gap for coupling to the electrical conductor. The air gap of the magnetic circuit contains a magnetic-field-sensitive component that is used to measure the magnetic field generated by the electrical conductor, wherein, the air gap of the magnetic circuit contains a control core, wherein the control core has a control winding for the magnetic saturation of the control core. In the vicinity of the magnetic-field-sensitive component there are several additional elements that are suitable for conducting interfering magnetic fields in the surroundings of the magnetic-field-sensitive component independent of the control cores.

The invention relates to an arrangement for measurement of a current flowing in an electrical conductor having a magnetic circuit, for coupling to the electrical conductor, wherein the magnetic circuit has an air gap. A magnetic-field-sensitive component is located in the air gap in the magnetic circuit and is used to measure the magnetic field produced by the electrical conductor. Two control cores are arranged in the air gap in the magnetic circuit, wherein the control cores each have a control winding for magnetic saturation of the respective control core. The magnetic-field-sensitive component is arranged between the control cores and one or more additional elements are located in the vicinity of the magnetic-field-sensitive component, and are suitable for guidance of disturbing magnetic fields in the vicinity of the magnetic-field-sensitive component, independent of the control cores.

Arrangement for measuring the current flowing in an electric conductor

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

Bernhard Roellgen