Epcos Ag

Lisa Draexlmaier Gmbh

Lisa Draxlmaier Gmbh

Bernhard Rollgen

Christian Hausperger

Edgar Kindler

Ricardo Erckert

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.

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

A device for measuring a current flowing in an electrical conductor having a sensor disposed in the region of the electrical conductor for measuring the magnetic field surrounding the electrical conductor. The sensor includes a magnetic circuit having a first and a second section. A magnetizing device for the saturation of the second section and an evaluation device for calculating the current flowing through the electrical conductor in dependence on measured values B(P), B(P), B(P), B(P), B(P+), B(P&#x2212;) of the magnetic field surrounding the electrical conductor and in dependence on the applicable magnetization of the second section is also provided. A method for operating the device is also disclosed.

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Munich, Germany

Bernhard Rollgen