Device for Determining an Electric Current Through a Line in a Vehicle
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorHannes BOERNGEN
Life of this patent
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Abstract
A device for determining an electric current through a line in a vehicle, including a magnetic core configured to run around the line in a ring-shaped manner, and which is at least partially interrupted along the ring-shaped profile by a first air gap and a second air gap. The device also has a magnetic field sensor located inside the first air gap and is configured to generate a sensor signal depending on a magnetic flux in the first air gap caused by the electric current. A gap width of the first air gap is smaller than a gap width of the second air gap. The device also has an evaluation unit to determine an actual value of the electric current depending on the sensor signal.
Claims12
A device for determining an electric current through a line in a vehicle, the device comprising:
- a magnetic core configured to run around the line in a ring-shaped profile, wherein the magnetic core is at least partially interrupted along the ring-shaped profile by a first air gap;
- a magnetic field sensor that is located inside the first air gap and which is configured to generate a sensor signal depending on a magnetic flux in the first air gap that is caused by the electric current,
- wherein the magnetic core is at least partially interrupted along the ring-shaped profile by a second air gap,
- wherein a gap width of the first air gap is smaller than a gap width of the second air gap;
- and
- an evaluation unit configured to determine an actual value for the electric current through the line depending on the sensor signal.
A method for determining an electric current through a line in a vehicle by a device,
- wherein the device comprises:
- a magnetic core configured to run around the line in a ring-shaped profile, wherein the magnetic core is at least partially interrupted along the ring-shaped profile by a first air gap;
- a magnetic field sensor that is located inside the first air gap and which is configured to generate a sensor signal depending on a magnetic flux in the first air gap that is caused by the electric current,
- wherein the magnetic core is at least partially interrupted along the ring-shaped profile by a second air gap,
- wherein a gap width of the first air gap is smaller than a gap width of the second air gap;
- and
- an evaluation unit configured to determine an actual value for the electric current through the line depending on the sensor signal,
- wherein the magnetic core of the device runs around the line in a ring-shaped manner,
- wherein the method comprises:
- generating a sensor signal depending on a magnetic flux in the first air gap caused by the electric current;
- and
- determining an actual value for the electric current through the line depending on the sensor signal.
Dependencies are inferred from the claim text.