Electricity: power supply or regulation systems – Output level responsive – Phase controlled switching using electronic tube or a three...
Reexamination Certificate
2003-08-14
2004-11-16
Berhane, Adolf (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Phase controlled switching using electronic tube or a three...
Reexamination Certificate
active
06819090
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a line voltage regulator that regulates the voltage across a load by phase angle control.
BACKGROUND OF THE INVENTION
Line voltage regulators are used to control the voltage applied to a load. A phase angle control technique can be used to adjust the effective voltage applied across the load by phase shifting the gate pulses of switching devices used in the voltage adjusting circuit. The present invention provides a means of adjusting the effective voltage applied to a load based upon fluctuations in a supply line voltage.
BRIEF SUMMARY OF THE INVENTION
In one aspect, the present invention is an apparatus for, and method of, regulating the effective voltage across a load by phase angle control of the supply line voltage based upon fluctuations in the supply line.
Other aspects of the invention are set forth in this specification and the appended claims.
REFERENCES:
patent: 3599082 (1971-08-01), Besier
patent: 4916329 (1990-04-01), Dang et al.
patent: 5355025 (1994-10-01), Moran et al.
patent: 6621254 (2003-09-01), Williams
Athena Controls Inc.
Berhane Adolf
Post Philip O.
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