Direct load current sensing for predicted regulator tap position

Details Direct load current sensing for predicted regulator tap position Direct load current sensing for predicted regulator tap position

1995-06-29

1997-05-27

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a transformer or inductor as the final control device

323263, G05F 1147

Patent

active

056335806

ABSTRACT:
A tap changer including a tap positionable to vary the winding ratio of the transformer in response to changes in an electric load on the transformer is disclosed herein. The transformer includes an electric drive which is responsive to raise or lower signals applied thereto in order to selectively position the tap by the raising or lowering of the tap and thereby raising or lowering the transformer winding ratio. Upon sensing the current of the motor control signals, an up/down counter is incremented or decremented. Accordingly, when a tap change signal is detected, the direction of tap changer movement may be determined, based upon the value of the up/down counter. In this way the tap position is also accurately determined and known.

REFERENCES:
patent: 3622867 (1971-11-01), Topper et al.
patent: 4419619 (1983-12-01), Jindrick et al.
patent: 4612617 (1986-09-01), Laplace, Jr. et al.
patent: 5119012 (1992-06-01), Okamura
patent: 5408171 (1995-04-01), Eitzmann et al.
patent: 5545974 (1996-08-01), Trainor et al.

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