Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1991-06-10
1992-06-02
Sterrett, Jeffrey L.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363 61, 363 90, 363101, 363143, 323207, H02M 5458
Patent
active
051192837
ABSTRACT:
A voltage-doubler rectifier includes an ac fullbridge diode rectifier and a dc-to-dc converter having two output boost circuits. One of the output boost circuits is coupled between the rectifier and a dc link, and the other output boost circuit is coupled, with opposite polarity, between the rectifier and the circuit common. Two series-connected filter capacitors are also coupled between the dc link and the circuit common. In a preferred embodiment, the two output boost circuits each comprise either a series, parallel, or combination series/parallel resonant circuit and a rectifier. A switch is coupled between the junction joining one pair of diodes of the rectifier and the junction joining the two filter capacitors. For a relatively high ac line voltage, the switch is open, and the circuit operates in a low boost mode. For a relatively low ac line voltage, the switch is closed, and the circuit operates in a high boost, or voltage-doubling, mode.
REFERENCES:
patent: 3851182 (1974-11-01), Wallace
patent: 4642745 (1987-02-01), Steigerwald et al.
patent: 4780805 (1988-10-01), Chewuk et al.
patent: 4930061 (1990-05-01), Slack et al.
patent: 4959766 (1990-09-01), Jain
patent: 4967333 (1990-10-01), Callier et al.
Korman Charles S.
Steigerwald Robert L.
Breedlove Jill M.
Davis Jr. James C.
General Electric Company
Snyder Marvin
Sterrett Jeffrey L.
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