Current measuring device
First Claim
1. A current measuring device for measuring magnetic fields in a conductor, the measuring device comprising:
- a base made from a nonconductive plastic material;
a cover removably coupled to said base, said cover made from a nonconductive plastic material;
a magnetic shield member coupled to said base, said magnetic shield member having a substantially uniform thickness, wherein said magnetic shield member has a semi-circular surface;
a compliant member coupled to said magnetic shield member;
a Hall effect device coupled to said cover opposite said magnetic shield member wherein said magnetic shield member and said Hall effect device are arranged with a gap sized to receive said conductor between said semi-circular surface and said Hall effect device; and
,a current sensing circuit position on a surface of the magnetic shield member opposite to the Hall effect device.
3 Assignments
0 Petitions
Accused Products
Abstract
A current sensor is provided for non-invasively measuring electrical current in an electrical conductor. The current sensor includes a housing having a Hall effect device and circuitry for transmitting a signal indicative of the current flowing through the electrical conductor. The current sensor includes a base having a surface for supporting an electrical conductor. A magnetic shielding member is coupled to the surface to shield the Hall effect device from stray or external magnetic fields. A compliant member is coupled to the magnetic shielding member opposite the surface. The compliant member compresses to allow the current sensor to accommodate a large variety of electrical conductor sizes. The compliant member further acts to bias the electrical conductor against the Hall effect device.
53 Citations
21 Claims
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1. A current measuring device for measuring magnetic fields in a conductor, the measuring device comprising:
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a base made from a nonconductive plastic material; a cover removably coupled to said base, said cover made from a nonconductive plastic material; a magnetic shield member coupled to said base, said magnetic shield member having a substantially uniform thickness, wherein said magnetic shield member has a semi-circular surface; a compliant member coupled to said magnetic shield member; a Hall effect device coupled to said cover opposite said magnetic shield member wherein said magnetic shield member and said Hall effect device are arranged with a gap sized to receive said conductor between said semi-circular surface and said Hall effect device; and
,a current sensing circuit position on a surface of the magnetic shield member opposite to the Hall effect device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A current sensor for measuring magnetic fields in a conductor, the current sensor comprising:
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a housing having a cover and a base, said housing having a first opening on a first side and a second opening on a second side opposite said first opening, said base further having a semi-cylindrical surface extending between said first opening and said second opening, said cover having a hollow interior portion opposite said semi-cylindrical surface, said housing being made from a nonconductive plastic material; a fastener coupling said cover to said base; a semi-circular magnetic shielding member coupled to said semi-cylindrical surface; a compliant member coupled to said magnetic shielding member; a Hall effect device coupled to said cover within said hollow interior portion opposite said semi-cylindrical surface, wherein said semi-circular magnetic shielding member and said Hall effect device are arranged to define a gap sized to receive said conductor; and
,a current sensing circuit mounted within said housing and electrically coupled to said Hall effect device. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A current sensor for measuring electrical current flow through an electrical conductor, said current sensor comprising:
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a cover having a substantially planar first surface and a wall extending around said first surface, said cover having a first semicircular opening in a first side of said cover wall and a second semicircular opening in a second side of said cover wall opposite said first semicircular opening, said cover having a substantially hollow interior portion between said first semicircular opening and said second semicircular opening, said covering being made from an electrically nonconductive plastic material; a base coupled to said cover, said base having a substantially planar second surface and a wall extending around said second surface, said base wall having a third semicircular opening in a first side of said base wall adjacent said first semicircular opening and a fourth semicircular opening in a second side of said base wall adjacent said second semicircular opening, said base further having a semi-cylindrical surface extending between said third semicircular opening and said fourth semicircular opening, said base being made from an electrically nonconductive plastic material; a Hall effect device coupled to said cover within said hollow interior portion opposite said semi-cylindrical surface; a semi-cylindrical magnetic shield member coupled to said semi-cylindrical surface between said semi-cylindrical surface and said compliant member, wherein said semi-cylindrical magnetic shield member and said Hall effect device are arranged to define a gap sized to receive said conductor; a compliant member coupled to said semi-cylindrical surface between said semi-cylindrical surface and said Hall effect device; and
,a current sensing circuit coupled to said cover and electrically coupled to said Hall effect device. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification