Bus bar current detecting apparatus
First Claim
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1. A current detecting apparatus, comprising:
- a plurality of bus bars each for passing a current;
a current sensor sensing a magnetic field near a first bus bar among said plurality of bus bars for detecting a current passing through said first bus bar; and
a magnetic shield provided to a second bus bar among said plurality of bus bars that is arranged at a position where magnetic interference to said current sensor may be caused, for reducing the magnetic interference to said current sensor.
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Abstract
A current detecting portion A includes a magnetic shield attached to a bus bar BU, a magnetic shield attached to a bus bar BV, and a magnetic shield attached to a bus bar BW. On bus bars BV, BU and BW arranged in parallel, current sensors SU, SV and SW are arranged at alternately displaced positions along each bus bar. The magnetic shields are also arranged at alternately displaced positions along each bus bar. The arrangement of the magnetic shield and the current sensors is what is called a staggered arrangement, whereby magnetic interference from an adjacent bus bar to a current sensor can be avoided.
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Citations
16 Claims
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1. A current detecting apparatus, comprising:
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a plurality of bus bars each for passing a current;
a current sensor sensing a magnetic field near a first bus bar among said plurality of bus bars for detecting a current passing through said first bus bar; and
a magnetic shield provided to a second bus bar among said plurality of bus bars that is arranged at a position where magnetic interference to said current sensor may be caused, for reducing the magnetic interference to said current sensor. - View Dependent Claims (2, 3)
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4. A current detecting apparatus, comprising:
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a plurality of bus bars each for passing a current, at least part of said plurality of bus bars being arranged in parallel; and
a plurality of current sensors respectively arranged to said plurality of bus bars, wherein said plurality of current sensors are arranged at alternately displaced positions along said part of plurality of bus bars being arranged in parallel. - View Dependent Claims (5, 6, 7, 8)
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9. A current detecting apparatus, comprising:
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a first bus bar for passing a current;
a plurality of current sensors arranged to said first bus bar; and
a processing portion receiving outputs of said plurality of current sensors to sense a value of the current passing through said first bus bar. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification