Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1977-03-30
1978-12-26
Shoop, William M.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
307 11, 323 75F, 323 75P, 363 44, H02M 706
Patent
active
041319397
ABSTRACT:
A power supply circuit for converting alternating current into d.c. voltage at substantially constant current for loads varying over a wider range of resistance or impedance, allowing the d.c. output voltage to vary in accordance with the load resistance, or impedance, or to be limited to a maximum value. A full-wave conversion circuit comprises a.c. input terminals, a network having parallel-connected arms containing respective diodes and output capacitors, the diodes being oppositely poled, and input capacitor means connected in series with the network to the a.c. input terminals. The junctions of the diodes with the output capacitors are the d.c. output terminals. A half-wave version of the circuit consists of a.c. input terminals, and a network consisting of series-connected diodes connected across an output capacitor, the network being connected to the a.c. input terminals through an input capacitor which is connected between one of the a.c. input terminals and the common junctions of the diodes. The d.c. output is taken across the series-connected diodes. The full-wave conversion circuit may be expanded by an additional pair, or pairs of diodes and additional pairs of output capacitors to provide for many d.c. loads to be serviced simultaneously.
REFERENCES:
patent: 2964637 (1960-12-01), Keizer
patent: 3012192 (1961-12-01), Lion
patent: 3978388 (1976-08-01), DE Vries
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