Electricity: power supply or regulation systems – Remote sensing
Patent
1974-12-13
1976-10-26
Goldberg, Gerald
Electricity: power supply or regulation systems
Remote sensing
323 60, 323 61, G05F 138, G05F 164
Patent
active
039886620
ABSTRACT:
A thyristor controlled ferroresonant voltage regulator in which the output voltage is made adjustable by varying the reset flux level of each of two parallel magnetic core paths upon which the load windings are wound. Decoupling from the alternating current source is provided by a separate inductor. The two core paths are decoupled by magnetic shunts, which provides an inductance which may be designed to obtain a soft commutation characteristic for the ferroresonant capacitor. During one half cycle of the output waveform one thyristor is enabled by an associated control circuit to complete a circuit path for the resonant capacitor through a winding on the second magnetic core path, while the flux in the first magnetic core path is clamped; in the second half cycle, another thyristor is enabled at a time determined by the control circuit, to complete a circuit path for the capacitor through a winding on the first magnetic core path while the flux in the second magnetic core path is clamped.
REFERENCES:
patent: 2706271 (1955-04-01), Fletcher
patent: 3739257 (1973-06-01), Hunter
patent: 3824449 (1974-07-01), Hase
patent: 3904954 (1975-09-01), Knudson
(SZ6540008) IEEE Transactions on Magnetics, Sept. 1971, pp. 564-567.
"Closed-Loop Controlled Ferroresonant Regulator" by Higuchi et al., IBM Tech. Disc. Bull., vol. 17, No. 9, Feb. 1975, pp. 2736, 2737.
Goldberg Gerald
North Electric Company
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