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:
Sep. 17, 2013
Filed:
Apr. 14, 2010
Douglas A. Johnson, Groveland, MA (US);
Douglas A. Johnson, Groveland, MA (US);
East Coast Research and Development, LLC, Groveland, MA (US);
Abstract
An apparatus for inverting DC voltage to AC voltage by stacking of DC voltage sources from a series of DC voltage sources comprises a plurality of circuits. Each circuit includes a first power switch, a second power switch, and a third power switch. The first power switch allows selective connection of adjacent DC voltage sources in the series to provide stacking of DC voltage sources. The second power switch allows selective connection of a first bus to a corresponding location between adjacent DC voltage sources. The third power switch allows selective connection of a second bus to a corresponding location between adjacent DC voltage sources. Controlling the plurality of power switches produces an AC voltage output by coordinating stacking of DC voltage sources and associated connections to the first bus and the second bus.