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:
Apr. 07, 1998
Filed:
Aug. 12, 1996
Daniel L Hughes, Rockford, IL (US);
Thomas S Latos, Huntley, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
The present invention is an electrical power generating system and method of operation. An inverter (18) is responsive to a DC potential for producing a fundamental frequency alternating current output such as 400 Hz. three-phase AC including harmonics. A first harmonic suppression filter (22), coupled to the alternating current output, produces an output having reduced harmonics compared to the harmonics in the input of the inverter. An isolation transformer (61) has a primary coupled to an output (24) of the first harmonic filter, a first secondary for outputting the alternating current at the fundamental frequency, and a second secondary for also outputting the alternating current at the fundamental frequency. A first rectifier (65) is coupled to the output (63) of the first secondary and produces direct current including harmonics produced by the rectification. A second harmonic suppression filter (69), coupled to the output (67) of the rectifier, outputs direct current having reduced harmonics compared to the harmonics in the output of the fullwave rectifier.