Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1987-09-21
1989-08-29
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 97, H02M 3335
Patent
active
048623385
ABSTRACT:
A ringing choke converter which comprises an output transformer having a primary winding, a secondary winding, and a feedback winding and/or a control winding, a main switching transistor having its collector connected to the primary winding and its base and emitter connected to the feedback winding, and a rectifying diode connected to the secondary winding. In accordance with the present invention, a control transistor is connected between the base and emitter of the main transistor; a time constant circuit composed of a resistor and a capacitor is connected across the feedback winding or control winding; the connection point between the resistor and the capacitor is connected to the base of the control transistor; and an adjusting circuit for adjusting the charging time constant of the capacitor in accordance with the output voltage is connected to the connection point.
REFERENCES:
patent: 4443838 (1984-04-01), Yamada
patent: 4654771 (1987-03-01), Stasch et al.
patent: 4763236 (1988-08-01), Usui
Burns Robert E.
Lobato Emmanuel J.
Peckman Kristine
Shindengen Kogyo Kabushiki Kaisha
Wong Peter S.
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