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:
Oct. 09, 2012
Filed:
Jun. 03, 2011
Yasusuke Iwashita, Minamitsuru-gun, JP;
Shinichi Horikoshi, Minamitsuru-gun, JP;
Takashi Harada, Minamitsuru-gun, JP;
Shinichi Mizukami, Minamitsuru-gun, JP;
Yasusuke Iwashita, Minamitsuru-gun, JP;
Shinichi Horikoshi, Minamitsuru-gun, JP;
Takashi Harada, Minamitsuru-gun, JP;
Shinichi Mizukami, Minamitsuru-gun, JP;
FANUC Corporation, Minamitsuru-gun, Yamanashi, JP;
Abstract
A motor drive device including a converter for a power running operation and a power regenerative operation. The converter has power switching elements, a first power regenerative control unit for controlling the power switching elements in the power regenerative operation by using pulse width modulation signal whose pulse width changes with a value indicated by a command signal; a second power regenerative control unit for controlling the power switching elements in the power regenerative operation to generate respective power regenerative currents in a phase representing the maximum potential among three phases of a three-phase AC power supply and a phase representing the minimum potential among the three phases, and a power regenerative operation switching unit for switching a control of the power switching elements in the power regenerative operation between a control by the first power regenerative control unit and a control by the second power regenerative control unit.