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:
Jan. 14, 2003
Filed:
Apr. 03, 2001
Toshiaki Oka, Tokyo, JP;
Kazuto Kawakami, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In a power conversion device comprising an AC filter for harmonic current suppression having a combination of at least some of a reactor, capacitor and resistance and a power conversion circuit that converts AC power into DC power or DC power into AC power and is connected to an AC power source through AC filter by providing: voltage reference calculation means (unit) that calculates and outputs a voltage reference corresponding to the voltage that is to be output by the power conversion device main unit; current detection means (unit) that detects and outputs current flowing through a prescribed location between AC power source and power conversion circuit and voltage reference correction means (unit) that uses the output from current detection means (unit) as a voltage reference correction signal to correct the voltage reference that is output from voltage reference calculation means (unit) resonance of the AC filter for harmonic current suppression is suppressed without employing a damping resistance for resonance suppression.