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. 06, 2010
Filed:
Apr. 23, 2007
Yasuaki Hayami, Yokosuka, JP;
Kentarou Shin, Yokohama, JP;
Kraisorn Throngnumchai, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Abstract
A power control apparatus and power control method that reduce harmonic noise produced when modulating a carrier wave frequency over predetermined cycles. A command value signal is generated for obtaining a desired output voltage, and a carrier wave is output. The frequency of the carrier wave is modulated by a desired frequency over predetermined cycles, and the desired frequency also modulates. The carrier wave is compared to a command value signal and a resulting control signal is provided to a switching unit. Harmonic noise caused by the modulation frequency can be spread, and the peak of the harmonic noise caused by the first modulation frequency can be reduced. Therefore, noise caused by a modulation frequency can be reduced.