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:
Jun. 18, 2002
Filed:
Oct. 26, 2001
Shinichi Ogusa, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A power conversion equipment capable of dealing with an imbalance fault by changing characteristics of a filter for extracting negative-phase-sequence voltage in a steady state and at the time of a system fault, and a control device for the conversion equipment. The control device for power conversion equipments includes a negative-phase-sequence component extractor including first and second negative-phase-sequence component extraction filters having different extracting capabilities, and for extracting a negative-phase-sequence component from the two phase voltage using the first negative-phase-sequence component extraction filter in a steady state and extracting a negative-phase-sequence component from the two phase voltage using the second negative-phase-sequence component extraction filter in a transient state. In the negative-phase-sequence component extractor, a negative-phase-sequence component is extracted by the different negative-phase-sequence component extraction filters in the steady state and in the transient state, so that approprate control can be provided.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile