DC to AC switching converter with phased delayed parallel switch

Details DC to AC switching converter with phased delayed parallel switch DC to AC switching converter with phased delayed parallel switch

1987-11-13

1989-06-27

Salce, Patrick R.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363134, H02M 7519, H02M 7527

Patent

active

048435341

ABSTRACT:
In a switching type DC to AC power converter a plurality (A-D, FIG. 6) of pairs of switchers (S1 and S2) are connected through inductors (L.sub.A -L.sub.D) to a load. Each set of switchers is switched to produce a square wave shaped output voltage (FIGS. 5A-5D) at a switch frequency (f.sub.S) and at a modulation percentage to produce an output voltage (E.sub.O) to a load, at a selected frequency. The sets are switched at phased delays, so that the ripple currents through them, when summed up, result in a ripple current I.sub.T at a frequency f.sub.C, where f.sub.C =n.multidot.f.sub.S, n being the number of pairs of switchers. In another aspect of the invention, means are incorporated to prevent the flow of currents between parallel connected amplifiers, characterized by zero output impedances.

REFERENCES:
patent: 4067057 (1978-01-01), Taddeo et al.
patent: 4174534 (1979-11-01), Kotlarewsky
patent: 4359679 (1982-11-01), Regan
patent: 4425613 (1984-01-01), Shelly
patent: 4695933 (1987-09-01), Nguyen et al.

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