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. 27, 2007
Filed:
Mar. 07, 2006
Masaaki Ohshima, Tokyo, JP;
Hirokazu Shimizu, Tokyo, JP;
Shuichi Ushiki, Tokyo, JP;
Origin Electric Company, Limited, Tokyo, JP;
The Tokyo Electric Power Company, Incorporated, Tokyo, JP;
Abstract
To suppress a DC component in AC power in a power converter for converting DC power to AC power. DC power is converted to AC power by a converter, and the AC power is supplied to output terminals uand uvia an inductor. The converteris controlled based on an error Δ(t) between an output current i(t) outputted from the converterand a target current j(t) outputted from a target current generation meansas a target value for the output current i(t), and a DC component Vin an output terminal voltage v(t) is detected by a voltage detection means. A DC component Iis suppressed by correcting a target current j(t) by a DC component suppression means. Also, a DC component in the AC power is suppressed to prevent biased magnification of a transformerby calculating a correction amount j(t) for correcting the target current j(t) from the difference between a first instantaneous value dof a load current i(t) flowing to a loadat a first time point tand a second instantaneous value dof the load current i(t) at a second time point tthat is a half cycle after the first time point to correct the target current j(t).