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:
May. 10, 2005
Filed:
Jan. 13, 2003
Shunsuke Matsubara, Yamanashi, JP;
Yuuichi Yamada, Yamanashi, JP;
Shinichi Horikoshi, Yamanashi, JP;
Kazuyuki Sugiyama, Yamanashi, JP;
Shunsuke Matsubara, Yamanashi, JP;
Yuuichi Yamada, Yamanashi, JP;
Shinichi Horikoshi, Yamanashi, JP;
Kazuyuki Sugiyama, Yamanashi, JP;
Fanuc Ltd., Yamanashi, JP;
Abstract
An inverter apparatus is provided with first and second current detectors for detecting the current of two arbitrary phases and further with first and second A/D converters, and they are integrated into one unit. It furthermore stores, in a storage device, a compensation value for compensating for an unbalance between gains of the first current detector and the first A/D converter, and gains of the second current detector and the second A/D converter. By multiplying the detected current value of either one of the detected phases by this compensation value, it equalizes the current feedback gains for both phases.