Variable voltage devices

Details Variable voltage devices Variable voltage devices

1975-03-06

1976-08-31

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

323 45, 323 47, G05F 114

Patent

active

039783952

ABSTRACT:
A variable voltage device is in the form of a transformer in which the secondary windings are arranged in two identical sets connected to operate in tandem. Each set includes a plurality of winding groups which are connected in series by switching devices. The switching devices can be operated to connect in or cut out a selected group or groups of windings from the series. The tandem operation of the two switching devices is delayed so that switching occurs in only one set at any one instant.

REFERENCES:
patent: 2884587 (1959-04-01), Hanthorn et al.
patent: 2916734 (1959-12-01), Spencer
patent: 3195038 (1965-07-01), Fry
patent: 3255403 (1966-06-01), Beaver et al.
patent: 3458797 (1969-07-01), Larsen
patent: 3619764 (1971-11-01), Brennan
patent: 3652824 (1972-03-01), Okada

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