Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1984-08-17
1987-03-03
Shaw, Clifford C.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 79, 363 97, H02M 3335
Patent
active
046480161
ABSTRACT:
The invention relates to a blocking oscillator switched mode power supply which is supplied with a primary voltage U.sub.p obtained by rectification of the AC line voltage. Because the line voltage varies, the secondary voltage which supplies electrical equipment is stabilized by means of a switched mode power supply. The maximum power from the supply generally depends on the primary voltage U.sub.p. The present invention has the objective of eliminating this disadvantage of the known switched mode power supplies. To this end, according to the invention, a correction circuit actuated via a voltage divided is provided, the voltage divider being connected to the primary voltage U.sub.p. The correction circuit is designed so that it keeps the breakpoint of the secondary current I.sub.s constant. It is thus possible to economize on the normally required overdimensioning of certain parts of the circuit, especially of the transformer, converter, and switching transistor, while on the other hand the invention can be realized at little cost.
REFERENCES:
patent: 4261032 (1981-04-01), Cavigelli
patent: 4488210 (1984-12-01), Shono
patent: 4504898 (1985-03-01), Pilukaitis et al.
Lenz Michael
Peruth Guenther
Edelman Lawrence C.
Shaw Clifford C.
Siemens Aktiengesellschaft
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