Arrangement and method for measuring a current flowing in an electrical conductor
First Claim
1. An arrangement for measuring a current flowing in an electrical conductor, the arrangement comprising:
- a magnetic circuit with an air gap for coupling to the electrical conductor;
a control core for controlling the air gap, the control core being arranged in the air gap, the control core having a control winding for magnetic saturation of the control core;
a magnetic-field-sensitive component arranged in the air gap of the magnetic circuit for measuring a magnetic field generated by the electrical conductor, the magnetic-field-sensitive component being arranged on a first side of the control core; and
a plurality of additional elements that are suitable for conducting magnetic fields in surroundings of the magnetic-field-sensitive component independent of the control core, the additional elements being located near the magnetic-field-sensitive component, wherein a first additional element is arranged within the control core and a second additional element is arranged outside of the control core.
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Accused Products
Abstract
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.
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Citations
20 Claims
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1. An arrangement for measuring a current flowing in an electrical conductor, the arrangement comprising:
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a magnetic circuit with an air gap for coupling to the electrical conductor; a control core for controlling the air gap, the control core being arranged in the air gap, the control core having a control winding for magnetic saturation of the control core; a magnetic-field-sensitive component arranged in the air gap of the magnetic circuit for measuring a magnetic field generated by the electrical conductor, the magnetic-field-sensitive component being arranged on a first side of the control core; and a plurality of additional elements that are suitable for conducting magnetic fields in surroundings of the magnetic-field-sensitive component independent of the control core, the additional elements being located near the magnetic-field-sensitive component, wherein a first additional element is arranged within the control core and a second additional element is arranged outside of the control core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for measuring a current flowing in an electrical conductor, the method comprising:
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coupling a magnetic circuit with the electrical conductor, wherein the magnetic circuit has an air gap and a control core arranged in the air gap for controlling the air gap, measuring a first magnetic field in a case of a saturated control core through one or more magnetic-field-sensitive components arranged in the air gap; measuring a second magnetic field in a case of an unsaturated control core through the one or more magnetic-field-sensitive component; and eliminating interference influences of external magnetic fields by balancing out the interference influences both for the measurement of the first magnetic field and also for the measurement of the second magnetic field through additional elements that are suitable, independent of the control core, for conducting magnetic fields in surroundings of a magnetic-field-sensitive component. - View Dependent Claims (19, 20)
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Specification