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:
Apr. 26, 2005
Filed:
Aug. 27, 2003
Veijo Karppinen, Vaasa, FI;
Risto Komulainen, Klaukkala, FI;
Veijo Karppinen, Vaasa, FI;
Risto Komulainen, Klaukkala, FI;
Vacon Oyj, Vaasa, FI;
Abstract
A method and an apparatus for compensating reactive power and/or harmonic currents in an alternating-current network by means of a frequency converter () feeding an alternating-current load (), which frequency converter has a mains bridge () and at least one load bridge (), said bridges being provided with controllable semiconductor switches. In the method, the reactive power and/or harmonic currents in the alternating-current network are measured, the load of the mains bridge of the frequency converter is measured, and the reactive power and/or harmonic currents in the alternating-current network are compensated by means of the frequency converter when the mains bridge is running at less than full capacity or has no load.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile