Analog based tap position detector

Details Analog based tap position detector Analog based tap position detector

1995-06-26

1998-09-08

Tso, Edward

Electricity: power supply or regulation systems

Output level responsive

Using a transformer or inductor as the final control device

323263, G05F 1147

Patent

active

058049541

ABSTRACT:
An tap changer for a voltage regulator 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 a potentiometer mechanically coupled to the tap changer motor and immersed in the coolant of the tap changer, wherein the potentiometer generates a voltage representative of the position of the tap. An analog-to-digital conversion circuit converts the voltage to a digital signal representative thereof, and a microprocessor coupled to the analog-to-digital conversion circuit compares the digital signal to digital data representative of the full voltage range of the potentiometer which is correlated to the actual position of the tap.

REFERENCES:
patent: Re29860 (1978-12-01), Scott
patent: 3622867 (1971-11-01), Topper et al.
patent: 3678372 (1972-07-01), Elder
patent: 3721894 (1973-03-01), Beckwith
patent: 4403332 (1983-09-01), Weber
patent: 4419619 (1983-12-01), Jindrick 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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