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:
Oct. 01, 2002
Filed:
Mar. 08, 2002
Norio Oba, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A control circuit of a power converter selecting an optimal mode for reducing the switching of switching elements. The control circuit includes a current instruction generator for providing current instruction values to a current loop which controls output currents of a power converter, a current deviation vector detector for calculating current deviations between the current instruction values and corresponding feedback values, respectively; a voltage detector for calculating a voltage vector of three-phase voltage generators, and a PWM pattern selector for selecting a PWM pattern for the power converter. When the current deviation vector deviates from the allowable deviation range, the PWM pattern selector selects a switching mode for the power converter from among switching modes limited by values of the current deviation vector and the voltage vector, and outputs the PWM pattern selected.