Switching power source device

Details Switching power source device Switching power source device

1988-04-28

1990-05-15

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 26, 363132, H02M 3335

Patent

active

049263021

ABSTRACT:
A switching power source device provides a desired AC/DC output by producing a pulse width-modulated waveform through ON-OFF control of a pair or pairs of switching elements connected in series with an input power source, eliminating high-frequency components of the pulse width-modulated waveform with a smoothing choke. The switching power source device is configured so that the input power source will not be short-circuited and consequently suffer a voltage and/or current surge, even when both switching elements in the pair assume the ON status at the same time by dividing the smoothing choke into two portions. The two portions of the smoothing choke are connected in series with the input power source when the switching elements in the pair assume the ON status at the same time.

REFERENCES:
patent: 3978393 (1976-08-01), Wisner et al.
patent: 4585986 (1986-04-01), Dyer
patent: 4594649 (1986-06-01), Rhoads et al.
patent: 4685039 (1987-08-01), Inou et al.
patent: 4691272 (1987-09-01), Geus

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