Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With electromagnetic field
Patent
1993-05-10
1996-02-06
O'Shea, Sandra L.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With electromagnetic field
324146, 324167, G01R 516, G01R 2300, G01R 120
Patent
active
054898420
ABSTRACT:
An apparatus includes a rotatably mounted magnetic rotor, a first coil mounted in proximity of the magnetic rotor, the first coil mounted such that, if the coil is flowing with electric current, the magnetic rotor is within immediate proximity of at least part of a magnetic field created by the coil. The apparatus includes a second coil mounted in proximity of the magnetic rotor, the second coil mounted such that, if the coil is flowing with electric current, the magnetic rotor is within immediate proximity of at least part of a magnetic field created by the coil. A current source is coupled to the first coil, for generating an AC signal and applying the AC signal across the first coil whereby an AC output signal develops across the second coil, the AC output signal having a magnitude that varies in relation to the rotational position of the rotor. A measuring circuit detects the AC output signal and develops therefrom a measure of the position of the rotor.
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Chintyan James R.
Johnston William J.
Lippmann Raymond
Nelson James E.
Schnars Michael J.
Delco Electronics Corporation
Funke Jimmy L.
O'Shea Sandra L.
Patidar Jay M.
Simon Anthony Luke
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