Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1987-06-29
1988-10-11
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 58, 363124, H02M 3315
Patent
active
047775769
ABSTRACT:
An energy converter of the type utilizing a series-resonant bridge circuit (1) containing at least two thyristors (6A, 7A, 6B, 7B) with diodes (8A, 9A, 8B, 9B) antiparallel connected thereto, a high-frequency output transformer (12), and an energy buffer (2). A control circuit (3) is incorporated for generating trigger pulses for the appropriate thyristors in response to the energy of the buffer (2). The energy converter further comprises a switching circuit (24) connected in at least one of the supply lines of the supply source to the series-resonant circuit for ensuring that the diode, antiparallel connected to the last-conducting thyristor, starts to draw current immediately after this thyristor is blocked. The control circuit (3) furthermore generates signals indicative of the presence of current flowing through the diodes, which signals control the supply of the trigger pulses to the thyristors.
REFERENCES:
patent: 4220989 (1980-09-01), Perilstein
patent: 4410926 (1983-10-01), Hafner et al.
patent: 4488213 (1984-12-01), Buikema
patent: 4495555 (1985-01-01), Eikelboom
patent: 4652985 (1987-03-01), Bougle
Briody Thomas A.
Franzblau Bernard
Hollandse Signaalapparaten B.V.
Treacy David R.
Wong Peter S.
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