1976-05-17
1977-04-12
Shoop, William M.
321 45R, H02M 3335
Patent
active
040177840
ABSTRACT:
The DC to DC converter contains a transformer, having a primary and a secondary winding and a predetermined leakage reactance existing between the primary and the secondary winding. A rectifier circuit is connected to the secondary and a large filter capacitance is connected to the rectifier to form an output across the filter capacitor adapted for connection to a load. A pair of electronic switches are connected across the input to the converter in series with the primary. A capacitor is included in series with the primary and voltage clamping diodes are coupled to the capacitor to prevent voltage across same from exceeding the input voltage level. Pulse generating means coupled to the load, monitor the load voltage level and provide suitable pulses alternately to said electronic switches so as to cause same to alternately conduct current through the capacitor and through the primary. Suitably the capacitive reactance of the capacitance bears a proper relationship to the leakage reactance of each secondary to effect a half sinusoid shaped current waveform through the primary during the operation of each switch. And as a function of the load voltage the periodicity of the pulses applied to the switches by the pulse generating means is increased or decreased.
REFERENCES:
patent: 3290581 (1966-12-01), Hooper
patent: 3327200 (1967-06-01), Corey
patent: 3504264 (1970-03-01), Suelzle
patent: 3683263 (1972-08-01), Fender
Launderville Paul Calvin
Simmons David Harry
Goldman Ronald M.
Litton Systems Inc.
Shoop William M.
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