Measuring electrical current flowing through a conductor
First Claim
Patent Images
1. An electric current sensor comprisinga coil assembly with a coil conductor;
- a circuit connected to the coil conductor;
a coil shield at least partially surrounding at least a portion of the coil assembly;
a conductive ground member; and
a cooling body arranged to cool the coil shield;
wherein the coil shield and the circuit are connected to the conductive ground member at respective, spaced apart ground connections.
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Abstract
A current measurement device for measuring an electrical current, in particular in a contactless manner, in a current-carrying conductor, using a coil arrangement having a coil conductor and a circuit connected to the coil conductor, the coil arrangement being surrounded at least in portions by a coil shield. The coil shield and the circuit are connected to a ground potential independently of each other. The measurement accuracy is thereby increased.
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Citations
24 Claims
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1. An electric current sensor comprising
a coil assembly with a coil conductor; -
a circuit connected to the coil conductor; a coil shield at least partially surrounding at least a portion of the coil assembly; a conductive ground member; and a cooling body arranged to cool the coil shield; wherein the coil shield and the circuit are connected to the conductive ground member at respective, spaced apart ground connections. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of measuring electrical current, the method comprising
placing a current sensor about an electrical conductor in a contact-free manner, the current sensor comprising a coil assembly with a coil conductor; -
a circuit connected to the coil conductor; a conductive ground member; a coil shield at least partially surrounding at least a portion of the coil assembly and a cooling body arranged to cool the coil shield; wherein the coil shield and the circuit are connected to the conductive ground member at respective, spaced apart ground connections; flowing an electrical current along the conductor; and measuring the flowing current with the sensor.
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16. An electric current sensor comprising
a coil assembly with a coil conductor; -
a circuit connected to the coil conductor; a conductive circuit shield arranged to shield the circuit; a conductive coil shield at least partially surrounding at least a portion of the coil assembly; a conductive ground member; and a cooling body arranged to cool the coil shield; wherein the coil shield and the circuit shield are connected to the conductive ground member at respective, spaced apart ground connections. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification