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. 18, 2006
Filed:
Mar. 09, 2004
Hideki Sunaga, Tokyo, JP;
Futoshi Araki, Tokyo, JP;
Kaoru Tanaka, Tokyo, JP;
Eiji Takahashi, Tokyo, JP;
Hideki Sunaga, Tokyo, JP;
Futoshi Araki, Tokyo, JP;
Kaoru Tanaka, Tokyo, JP;
Eiji Takahashi, Tokyo, JP;
Calsonic Kansei Corporation, Tokyo, JP;
Abstract
When a PWM signal generating unit () sets a duty D of a PWM signal based on command signals (), the PWM signal generating unit () sets a phase difference φ between each of the PWM signals based on a relation formula of φ (degree)=360 (degree)×D (%)/100 (%), and generates and outputs first PWM signals () and second PWM signals () in which the duty is D (%) and the phase difference is φ (degree). The first PWM signals () and the second PWM signals () are respectively supplied to a first load driving circuit () and a second load driving circuit () to operate a first motor fan () and a second motor fan () by a PWM control, respectively.