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:
Mar. 30, 2010
Filed:
Jul. 27, 2005
Applicants:
Asbrubal Garcia-ortiz, Chesterfield, MO (US);
John Wootton, St. Louis, MO (US);
Michael Duello, St. Louis, MO (US);
Inventors:
Asbrubal Garcia-Ortiz, Chesterfield, MO (US);
John Wootton, St. Louis, MO (US);
Michael Duello, St. Louis, MO (US);
Assignee:
DRS Sustainment Systems, Inc., St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/483 (2007.01);
U.S. Cl.
CPC ...
Abstract
Systems and methods are provided for operating a pulse width modulation (PWM) circuit in a direct current (DC) to alternating current (AC) power inverter to reduce the magnitude of harmonics. The PWM circuit operates using a reference signal having an irregular period. In one implementation the irregular periodicity includes a sequence of periods uniformly distributed about a target period.