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:
Feb. 26, 2013
Filed:
Mar. 31, 2008
Ryou Nakamoto, Osaka, JP;
Masafumi Hashimoto, Osaka, JP;
Keisuke Shimatani, Osaka, JP;
Keiichi Yoshisaka, Osaka, JP;
Masakazu Katou, Osaka, JP;
Ryou Nakamoto, Osaka, JP;
Masafumi Hashimoto, Osaka, JP;
Keisuke Shimatani, Osaka, JP;
Keiichi Yoshisaka, Osaka, JP;
Masakazu Katou, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
An increase in a ripple voltage of a capacitor in a smoothing circuit is prevented to achieve a compact capacitor and cost reduction for capacitors in an electric power supply circuit which performs PAM control using a switching element. An electric power supply circuit includes a bridge circuit for rectifying alternating current power, a smoothing circuit which has two capacitors serially connected to each other, and a PAM control section for turning a switching element on and off at a predetermined timing. The PAM control section includes a phase difference detection section which detects a phase shift of a PAM waveform based on a change in a voltage difference between the two capacitors, and a phase correction section which corrects the phase of the PAM waveform so that an input current has a sine waveform.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile