Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-04-02
1977-03-22
Corcoran, Robert J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
33362, G01R 3302
Patent
active
040139468
ABSTRACT:
A phase-sensitive device for determining the direction of a primary magnetic field is disclosed which includes an electrically conductive rotor mounted for rotation about a predetermined axis. The rotor includes means for defining at least one electrical path. The device further comprises means for detecting those secondary magnetic field components induced by rotation of the rotor in the primary magnetic field which are of a frequency equal to the rotation frequency of the rotor and for providing a corresponding first electrical signal responsively to these secondary field components. Means are also provided for detecting the angular position of the rotor with respect to the rotation axis and for providing a second electrical signal corresponding to said angular position of the rotor. The relative phase shift of the first and second electrical signals can then be determined. This relative phase shift is related to the direction of the primary field.
REFERENCES:
patent: 2049232 (1936-07-01), Sydnes
patent: 2451819 (1948-10-01), Frosch
patent: 2757335 (1956-07-01), Bellugue
McCutchen; C. W., Tim. a Brushless Generating Magnetometer, Jour. of Scien. Inst., vol. 36, Nov. 1959, pp. 471-474.
Corcoran Robert J.
Harnessed Energies, Inc.
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