Electricity: power supply or regulation systems – Self-regulating – Using a transformer or inductor as the final control device
Patent
1981-01-28
1982-06-22
Shoop, William M.
Electricity: power supply or regulation systems
Self-regulating
Using a transformer or inductor as the final control device
323256, 323341, G05F 304
Patent
active
043364900
ABSTRACT:
An automatic voltage regulating transformer is provided which incorporates a potential transformer electrically disposed across its series windings, and a set of sensing windings disposed across its shunt windings to provide a voltage sensing network which is responsive to the flow of current both into and out of the transformer. The output of the potential transformer is connected in series with the sensing windings to provide a control voltage which is representative of the voltage across the shunt windings and series windings taken together. In the case of a normal voltage regulating transformer, this control voltage is proportional to the voltage across the output terminals. In the case of an inverted regulating transformer, the output voltage of the voltage sensing network is proportional to the voltage across the input terminals. In each case the same control voltage can be used to automatically operate the transformer whether or not current is flowing into or out of the input terminals of the transformer. In one embodiment the tertiary winding that is used to provide voltage to operate the tap changing mechanism of the transformer is also used to provide a voltage proportional to the voltage across the shunt windings.
REFERENCES:
patent: 2137216 (1938-11-01), McCarty
patent: 2713142 (1955-07-01), Sealey
patent: 3054943 (1962-09-01), Kettler et al.
patent: 3184677 (1965-05-01), Jacobsen
patent: 3513380 (1968-06-01), Vargo
patent: 3757202 (1973-09-01), Prouty et al.
patent: 3895287 (1975-07-01), Sun et al.
Gabala James A.
Gealow Jon C.
McGraw-Edison Company
Shoop William M.
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