Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1978-06-12
1980-02-05
Shoop, William M.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 97, 320 2, 318345F, H02M 3335
Patent
active
041875362
ABSTRACT:
A small lightweight power-supply device a d.c. motor powered either by the a.c. supply voltage or by an accumulator battery which dissipates little power and has a well-defined output characteristic for a wide range of input voltages.
The device comprises a flyback converter, the forward sweep time being a function of the output voltage and the current through the primary winding of the transformer of the flyback converter. The forward sweep time is controlled by a control circuit which is integrated for the greater part. There is provided a starting circuit. A level detector in the control circuit ensures that this circuit is activated only when its supply voltage, which is applied via the secondary winding of the transformer, is sufficiently high.
REFERENCES:
patent: 3539898 (1970-11-01), Tolmie
patent: 3568038 (1971-03-01), Enders
patent: 3909696 (1975-09-01), Katou et al.
patent: 4071884 (1978-01-01), Maigret
patent: 4079295 (1978-03-01), den Hollander
patent: 4087850 (1978-05-01), Koizumi
Govaert George A.
Nijholt Meinardus A. G.
Rodenburg Lammert
Briody Thomas A.
Franzblau Bernard
Shoop William M.
Streeter William J.
U.S. Philips Corporation
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