Method for sensing electrical current
First Claim
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1. A method for sensing electrical current, the method comprising the acts of:
- applying a current to a deflectable sensing element, the deflectable sensing element positioned in a magnetic field; and
sensing deflection of the deflectable sensing element and producing a readout signal representative thereof.
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Abstract
A method is provided for sensing and measuring an electrical current. The current to be measured is applied to a deflectable member in a sensing module in the presence of a magnetic field. Deflection of the member is detected as an indication of the current. A nulling current may be applied to one or more additional deflectable members mechanically linked to the deflectable member. Feedback or readout signals indicative of deflection of the members are monitored. The nulling current is modulated to drive the feedback signals to a desired level. The nulling current value is converted to a value representative of the current to be measured.
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Citations
37 Claims
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1. A method for sensing electrical current, the method comprising the acts of:
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applying a current to a deflectable sensing element, the deflectable sensing element positioned in a magnetic field; and
sensing deflection of the deflectable sensing element and producing a readout signal representative thereof. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for sensing electrical current, the system comprising:
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means for applying a current to a deflectable sensing element, the deflectable sensing element positioned in a magnetic field; and
means for sensing deflection of the deflectable sensing element and producing a readout signal representative thereof. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An electrical current sensing device comprising:
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a magnetic field;
a deflectable sensing element disposed in the magnetic field; and
a deflectable nulling element coupled to the deflectable sensing element;
wherein a current to be measured to applied to the deflectable sensing element and a nulling current is applied to the nulling element, and the nulling current is modulated to control deflection of the deflectable sensing element. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method for sensing an electrical current, the method comprising the steps of:
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applying a current to be measured to first input and output terminals of a sensing array in a stationary magnetic field;
applying a nulling current to second input and output terminals of the sensing array; and
detecting feedback signals from a plurality of feedback devices coupled to the sensing array. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A system for measuring electrical current, the system comprising:
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means for applying a current to be measured to a first deflectable member in a first polarity in the presence of a magnetic field;
means for applying a compensating current to a second deflectable member in a second polarity opposite to the first polarity in the presence of the magnetic field, the second deflectable member being mechanically linked to the first deflectable member;
means for detecting deflection of the first and second deflectable members;
means for determining the current to be measured based upon the detected deflection and the compensating current. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A tangible medium for measuring an electrical current comprising:
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a routine for applying a first current to first input and output terminals of a sensing array disposed in a magnetic field;
a routine for applying a second current to second input and output terminals of the sensing array; and
a routine for detecting feedback signals from a plurality of feedback devices, the plurality of feedback devices adapted to detect deflection in the sensing array. - View Dependent Claims (33, 34, 35, 36, 37)
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Specification