DC to AC inverter

Details DC to AC inverter DC to AC inverter

1978-08-08

1979-10-23

Shoop, William M.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

H02M 7515

Patent

active

041722787

ABSTRACT:
A full wave DC to AC inverter having two SCR inverter switches which alternately conduct to connect a DC source across one section or the other of a center tapped power transformer primary to establish an alternating current in the secondary. A commutating circuit includes a single capacitor which is charged during the conduction of the inverter switches and is alternately connected to the conducting inverter switch to turn it off. The commutating circuit employs a single transformer which has a primary winding connected in series with the primary winding of the power transformer and a secondary winding connected through an SCR and to the capacitor. A pair of SCR's, which are gated on by commutation trigger circuits, control the discharge of the capacitor to the appropriate SCR inverter switch. Time delay and pulse circuits provide successive gating pulses to the SCR inverter switches to assure turn-on after an established preset time delay so that the commutation trigger circuit turns off the conducting SCR inverter switch before the other inverter switch is turned on.

REFERENCES:
patent: 3181053 (1965-04-01), Amato
patent: 3263153 (1966-07-01), Lawn
patent: 3916290 (1975-10-01), Rao et al.
patent: 3942094 (1976-03-01), Akamatsu

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