Device and method for measuring a current flowing in an electrical conductor
AssigneesLisa Draexlmaier GmbH, Epcos AG
InventorsChristian Hausperger, Edgar Kindler, Bernhard Rollgen
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Abstract
A device for measuring a current flowing in an electrical conductor. The device comprises a magnetic circuit coupled to an electrical conductor. The magnetic circuit has an air gap and a magnetic field sensitive component disposed in the air gap to measure a magnetic field generated by the electrical conductor. A control core has a control winding configured to control an effective length of the air gap when the control winding is energized. A magnetic shield at least partially encloses the magnetic circuit, the magnetic field sensitive component and the control core.
Claims11
A device for measuring a current flowing in an electrical conductor, said device comprising:
- a magnetic circuit adapted to be coupled to the electrical conductor, the magnetic circuit having an air gap;
- a magnetic field sensitive component disposed in the air gap to measure a magnetic field generated by the electrical conductor;
- at least one control core having a control winding configured to control an effective length of the air gap when the control winding is energized;
- and
- a magnetic shield that at least partially encloses at least one of the magnetic circuit and the magnetic field sensitive component, and the at least one control core, wherein the at least one control core comprises two control cores disposed in the air gap, and wherein the magnetic field sensitive component is disposed between the two control cores.
Dependencies are inferred from the claim text.