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:
Aug. 28, 2001
Filed:
Dec. 04, 2000
Applicant:
Inventors:
Yoshinao Naito, Tokyo, JP;
Koji Takada, Tokyo, JP;
Maki Ota, Tokyo, JP;
Masaki Hashimoto, Tokyo, JP;
Kazunori Yasuda, Tokyo, JP;
Assignee:
Yokogawa Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 ;
U.S. Cl.
CPC ...
H02M 3/335 ;
Abstract
A switching power supply wherein an inductor device is connected to the center tap of a primary winding of a transformer with a switching device provided to apply high frequency signals to the transformer concurrently with a rectified smoothed input signal applied to the primary winding concurrently by another inductor device so that the secondary winding of the transformer produces a DC output signal which is free of harmonic current and whereby the switching power supply power factor is improved.