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:
Jan. 04, 2011
Filed:
Jun. 03, 2008
Yasusuke Iwashita, Yamanashi, JP;
Takahiro Akiyama, Yamanashi, JP;
Masakazu Niwa, Yamanashi, JP;
Tomohisa Tsutsumi, Yamanashi, JP;
Yasusuke Iwashita, Yamanashi, JP;
Takahiro Akiyama, Yamanashi, JP;
Masakazu Niwa, Yamanashi, JP;
Tomohisa Tsutsumi, Yamanashi, JP;
Fanuc Ltd, Yamanashi, JP;
Abstract
An excitation current processor of a current controller processes the excitation current corresponding to the magnetic flux instruction from the magnetic flux instruction processor. It multiplies this excitation current with a boost coefficient to obtain an excitation current instruction. Here, the boost coefficient is determined based on the difference obtained by subtracting the magnetic flux estimation value processed by the magnetic flux processor based on the excitation current feedback from the voltage conversion device from the magnetic flux instruction input from the magnetic flux instruction processor. Further, the boost coefficient can be found from the function of time from the start of the rise of the magnetic flux.