Apparatus for sensing current
First Claim
1. A current sensor assembly comprising:
- at least one conductor;
a current sensor spaced apart from said conductor, said current sensor comprising a substantially cylindrical core including at least one winding having a substantially toroidal shape; and
an electrostatic shield winding is sensing around winding to form an electrostatic shield coil;
an electrostatic shield surrounding said current sensor;
wherein said sensor surrounds said conductor.
3 Assignments
0 Petitions
Accused Products
Abstract
A current sensor assembly includes a sensor coil, an electrostatic shield coil, a core, a housing, and a magnetic shield. The sensing coil, electrostatic shield coil, core, housing, and magnetic shield can be of toroidal symmetry and arranged coaxially about a pair of primary current conductors. The conductors can be either asymmetric or symmetric with respect to the geometric center of the remaining sensor assembly. The core and a secondary winding make up a current sensor. The core is cylindrically shaped and fabricated of non-magnetic material. The secondary winding is wound over the cylindrical core to form a toroidally shaped winding. When assembled into the current sensor assembly, the core and windings are disposed around two single turn primary windings through which AC currents to be measured flow. Alternatively, the conductor can be flat and the sensor can be a solid state sensor that includes an electrostatic shield. The conductor can have a magnetic flux concentrator positioned about the conductor in the same region where the sensor is located.
87 Citations
17 Claims
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1. A current sensor assembly comprising:
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at least one conductor;
a current sensor spaced apart from said conductor, said current sensor comprising a substantially cylindrical core including at least one winding having a substantially toroidal shape; and
an electrostatic shield winding is sensing around winding to form an electrostatic shield coil;
an electrostatic shield surrounding said current sensor;
wherein said sensor surrounds said conductor. - View Dependent Claims (2, 3, 4, 6, 7, 8, 9, 10, 11)
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5. A sensor assembly in accordance with claim 5 wherein said conductors are disposed concentrically with respect to the remaining toroidal assembly.
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12. A current sensor assembly comprising:
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at least one conductor;
a solid state current sensor;
a sensing region; and
an electrostatic shield surrounding said one conductor;
wherein said electrostatic shield comprises a conducting shell that at least partially encloses said solid state sensor;
wherein said at least one conductor is disposed to form a generally U shaped structure;
wherein said solid state current sensor is disposed within said at least one conductor so as to form said sensing region. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification