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:
Mar. 06, 2007
Filed:
Mar. 16, 2001
Reiji Kawashima, Shiga, JP;
Kenichi Sakakibara, Shiga, JP;
Sumio Kagimura, Osaka, JP;
Isao Tanatsugu, Osaka, JP;
Reiji Kawashima, Shiga, JP;
Kenichi Sakakibara, Shiga, JP;
Sumio Kagimura, Osaka, JP;
Isao Tanatsugu, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
A capacitor-input type three-phase rectification circuit comprises a three-phase AC power supply (), a diode rectifier circuit (), and a low-frequency filter connected between the three-phase AC power supply () and the diode rectification circuitry (), the low frequency filter consisting of AC reactors ()()() and Δ-connection or Y-connection capacitors ()()(), so that higher harmonic currents are reduced to be equal to or less than standard values, and that lowering in input power factor and lowering in DC voltage are prevented from occurrence.