Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Balancing
Patent
1987-07-16
1990-02-06
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Balancing
324117R, 324127, 330 8, G01R 3300, G01R 1900
Patent
active
048991031
ABSTRACT:
A variable electrical current in a first winding on a magnetizable core produces a magnetomotive force in the core. A second core winding produces an opposing magnetomotive force digitally adjustable periodically by a third core winding, a pair of switches and a flip-flop coupled to a center tap for alternately closing such switches when triggered to opposite states. The flip-flop is triggered between opposite states when the third winding current reaches a particular magnitude. In each cycle, the time differences for producing the particular magnitudes and the opposite polarities are dependent upon the remanent core flux. Such time differences are counted digitally upwardly and downwardly for opposite polarities. The second winding current is adjusted digitally in each cycle in a direction to minimize such count. The magnitudes of successive adjustments may be compared periodically by adaptive tracking techniques to control the magnitudes of subsequent adjustments. With large magnitudes of the variable current, the first winding on the core may receive a stepped-down current from a first winding on a second core having a second winding to receive the variable current. Windings on the first and second cores may be connected in a closed loop, or windings on a third core produce in the first core a magnetomotive force aiding the magnetomotive force from the current in the second winding on the second core to compensate for energy losses as a result of such current. The second core may be notched to prevent core becoming saturation.
REFERENCES:
patent: 3275934 (1966-09-01), Laishley
patent: 3422352 (1969-01-01), Paulkovich
patent: 3484691 (1966-11-01), MacMartin et al.
patent: 3539908 (1970-11-01), Zelina
patent: 3628251 (1971-12-01), Halder
patent: 3801907 (1974-04-01), Lilienstein
patent: 3818337 (1974-06-01), Groenenbroom et al.
patent: 3855528 (1974-12-01), Brown
patent: 3882387 (1975-05-01), Vikstrom
patent: 3955138 (1976-05-01), Milkovic
patent: 4015209 (1977-03-01), Meyer Ebrecht
patent: 4276510 (1981-06-01), Tompkins et al.
patent: 4278938 (1981-07-01), Morriss
patent: 4280162 (1981-07-01), Tanks et al.
patent: 4298838 (1981-11-01), Akamatsu et al.
patent: 4482862 (1984-11-01), Leehey
patent: 4495463 (1985-01-01), Milkovic
patent: 4529931 (1985-07-01), Kuhns
patent: 4540939 (1985-09-01), Osborne
patent: 4616174 (1986-10-01), Jorgensen
patent: 4682100 (1987-07-01), Hagelin
Brooktree Corporation
Eisenzopf Reinhard J.
Nguyen Vinh P.
Roston Ellsworth R.
Schwartz Charles H.
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