The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1979
Filed:
Aug. 08, 1978
Charles G Leverich, Skokie, IL (US);
Circom, Inc., Bensenville, IL (US);
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.