Constant voltage control apparatus capable of reducing...

Details Constant voltage control apparatus capable of reducing... Constant voltage control apparatus capable of reducing...

2007-02-20

2007-02-20

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S150000, C363S150000

Reexamination Certificate

active

10949439

ABSTRACT:
Provided is a constant voltage control apparatus capable of reducing feedback lines. In the constant voltage control apparatus, a first amplifier amplifies an output voltage applied to a pair of output terminals. A second amplifier amplifies a voltage drop between one of the output terminals and a load terminal connected thereto. A third amplifier amplifies output voltages from the first and second amplifiers, respectively. Comparing means receive an output voltage from the third amplifier and a reference voltage, and output an output voltage which makes a sum of the output voltage and the reference voltage of the third amplifier become zero. A triac drive unit amplifies the output voltage from the comparing means to control a triac installed on a power line that is connected with the first output terminal.

REFERENCES:
patent: 5408173 (1995-04-01), Knapp
patent: 5559422 (1996-09-01), Fahrenkrug et al.
patent: 5847944 (1998-12-01), Jang et al.

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