Dual mode direct current power supply

Details Dual mode direct current power supply Dual mode direct current power supply

1980-07-31

1982-04-06

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 70, 363 89, H02P 1326

Patent

active

043239609

ABSTRACT:
The disclosed dual mode direct current power supply comprises an AC transformer, a pair of DC output terminals, and first and second rectifier-filter circuits connected in parallel between the transformer and such terminals; the first circuit comprising first rectifiers for producing first rectified pulses, a first capacitor adapted to be charged to the peak voltage of such pulses, and an electronic voltage regulator including a series transistor; the second rectifier-filter circuit including second rectifiers for producing second rectified pulses, a choke input filter including an inductance and a second capacitor adapted to be charged through the inductance to the average voltage of the second pulses, and a series diode; the regulator causing the transistor to be nonconductive at high DC output voltage and then conductive increasingly in response to decreasing output voltage whereby the first rectifier-filter circuit supplies an increasing share of the load current.

REFERENCES:
patent: 3217233 (1965-11-01), Drusch

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