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:
Nov. 16, 2010
Filed:
Mar. 28, 2008
Tom G. Yohanan, Broken Arrow, OK (US);
John M. Leuthen, Claremore, OK (US);
Jerald R. Rider, Tulsa, OK (US);
Michael C. Underwood, Owasso, OK (US);
Tom G. Yohanan, Broken Arrow, OK (US);
John M. Leuthen, Claremore, OK (US);
Jerald R. Rider, Tulsa, OK (US);
Michael C. Underwood, Owasso, OK (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
Systems and methods for reducing harmonic distortion in a power system resulting from non-linear loading on the power system. The power at an interface with a power source is measured, and then distortion in the waveforms of the supplied power is identified. Cancellation signals which cancel all or part of the distortion are then generated and injected at the interface. In one embodiment, the power is sampled to determine the waveform, and then a Fast Fourier Transform is performed on the waveform to convert it to the frequency domain. Harmonics of the fundamental frequency can then be identified, and conjugates of the harmonics generated. An inverse Fast Fourier Transform is performed on the conjugates to generate a signal which is amplified to produce the cancellation signal.