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:
Jul. 28, 2009
Filed:
Oct. 11, 2007
Applicants:
Kentarou Shin, Yokohama, JP;
Kraisorn Throngnumchai, Yokohama, JP;
Yasuaki Hayami, Yokosuka, JP;
Inventors:
Assignee:
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An inverter system comprises a PWM generator that generates a control signal that causes a switching device to output an output value, a carrier signal generator that outputs a carrier signal to the PWM generator, a carrier frequency changing unit that changes a frequency of the carrier signal, and a target frequency setting unit that sets a target frequency and calculates a specific frequency from the target frequency. The carrier frequency changing unit changes a carrier frequency so that the specific frequency matches with a harmonic component of each of values of the carrier frequency.