Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Eddy current rotor
Patent
1985-03-14
1987-03-10
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Eddy current rotor
336136, G01R 1102, H01F 2106
Patent
active
046493379
ABSTRACT:
A phase lag adjustment in an electric meter includes a single-turn loop of large cross section encircling substantially the entire flux generated in a voltage stator which interacts which the disk of the electric meter. A variable inductor, in series with the single-turn loop, changes the effective impedance of the single-turn loop thereby adjusting the phase angle of the flux produced by the voltage stator. The variable inductor consists of a small number of turns of copper having a large cross section within a cylindrical shell made of silicon steel. Threaded bushings at each end of the cylindrical shell accept an adjusting bolt from either direction to permit adjustment from either end of the variable inductor. The silicon-steel cylindrical shell is clamped directly over connecting tabs of the cylindrical shell without insulation therebetween. The high resistance of silicon steel can be ignored in parallel with the much lower resistance of the copper turns.
REFERENCES:
patent: 764253 (1904-07-01), Peloux
patent: 2849680 (1958-08-01), Lenehan
patent: 3644810 (1972-02-01), Lewus
patent: 4054855 (1977-10-01), Schlotterbeck
Brunson R. E.
Eisenzopf Reinhard J.
General Electric Company
Morrison T. R.
Solis Jose M.
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