Electric power conversion systems – Current conversion – With starting arrangement
Patent
1979-04-23
1981-05-05
Shoop, William M.
Electric power conversion systems
Current conversion
With starting arrangement
363 17, 363 97, 363132, H02M 7537
Patent
active
042662680
ABSTRACT:
A switching power supply including a rectifier for rectifying input AC line power to provide a source of DC voltage, an output transformer having a primary winding for receiving power from the DC source and a plurality of secondary output windings for providing a plurality of regulated output voltages, an inductor coupled to the primary winding of the output transformer for returning stored energy to the source during switching dead times, a control circuit for monitoring the magnitude of the source voltage and for generating first and second switching control signals, the duty cycle of which is directly related to the magnitude of the source voltage, switching transistors for alternately completing oppositely directed current paths from the source through the transformer primary and inductor to ground, and diodes for creating a uni-directional current path to the source for energy stored in the inductor.
REFERENCES:
patent: 3406327 (1968-10-01), Mapham et al.
patent: 3624483 (1971-11-01), Genuit
patent: 4078247 (1978-03-01), Albrecht
patent: 4143414 (1979-03-01), Brewster et al.
patent: 4190883 (1980-02-01), Cowett, Jr.
Hamrick Claude A. S.
Shoop William M.
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