Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1987-05-14
1988-11-08
Salce, Patrick R.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 56, 361 91, H02H 7122
Patent
active
047837276
ABSTRACT:
A DC/DC converter has a transformer and a switching transistor provided with a discharge circuit and activated by an actuating circuit. The discharge circuit includes a choke in series with two reverse oriented diodes, and a capacitor connected between the junction of the diodes and the collector of the transistor. With this arrangement, the conventional demagnetizing winding of the transformer may be omitted. The duty factor may be chosen very high, to about 0.75, and the actuation of the switching transistor upon occurrence of a maximum negative magnetizing current may lead to a doubling of the usable induction.
REFERENCES:
patent: 4389702 (1983-06-01), Clemente et al.
patent: 4447741 (1984-05-01), Moschopoulos
patent: 4675796 (1987-06-01), Gautherin et al.
"Modelling and Design of Non-Dissipative LC Snubber Networks", Shaughnessy et al., Proceedings of Powercon 7, 7th National Solid State Power Conversion Conference, Mar. 1980, G4-1 to G4-9.
Elektronik, 24/Rene Sibille, "Ferritwerkstoffe und Kerne fur Schaltnetzteile", pp. 101-102 (3/12/82).
Elektronik, Dipl.-Ing. Karl Ruschmeyer, "Drosseln mit Permanent-Magnetischer Vormagnetisierung", pp. 80-82 (3/84).
Article--"Eigenschaften und Arbeitsprinzipien von Schaltnetzteilen" (Switching Grid Components), expert-Verlag, 2nd Ed., 1982, pp. 25,81 (FIG. 2.23).
Eckhardt AG
Salce Patrick R.
Todd Voeltz Emanuel
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