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. 05, 2008
Filed:
Feb. 15, 2005
Applicant:
Jaakko Ollila, Pirkkala, FI;
Inventor:
Jaakko Ollila, Pirkkala, FI;
Assignee:
Vacon Oyj, Vaasa, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for the synchronization of parallel-connected inverter units (INU, INU) or frequency converters and an inverter apparatus or a frequency converter apparatus wherein the inverter units are provided with inverter-specific modulators, in which method the circulating current between the inverter units is measured, and the modulators are synchronized to each other on the basis of the current measurement data.