Electric power conversion systems – Current conversion – Including automatic or integral protection means
Patent
1993-02-21
1994-04-26
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including automatic or integral protection means
323300, 363 81, 363 89, H02M 721, H02M 706
Patent
active
053072570
ABSTRACT:
A power-supply unit having a rectifier circuit, switch, first and second voltage generation circuits, a control circuit, and a capacitor. The rectifier circuit is connected to an A.C. power source. The switch opens/closes an electric line which supplies a load circuit with electric power from the A.C. power source via the rectifier circuit. The first voltage generation circuit generates a first voltage based on an output voltage of the rectifier circuit. The first voltage is a non-zero voltage. The second voltage generation circuit generates a second voltage based on the output voltage, and is larger than the first voltage. The control circuit turns the switch on when the output voltage is in a range between the first voltage and the second voltage, and turns the switch off when the output voltage is outside the range. The capacitor is charged with electricity by the output voltage when the output voltage is in the range, and supplies the load circuit with electric power when the output voltage is outside the range.
REFERENCES:
patent: 3697861 (1972-10-01), Frazier
patent: 3947752 (1976-03-01), Morgan
patent: 4001668 (1977-01-01), Lewis
patent: 4685046 (1987-08-01), Sanders
"Power Supplies", Machine Design, vol. 62 (1990) Jun., No. 11, pp. 474-485.
Beha Jr. William H.
Matsushita Electric - Industrial Co., Ltd.
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