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. 02, 2013
Filed:
Aug. 23, 2011
Yasusuke Iwashita, Minamitsuru-gun, JP;
Shinichi Horikoshi, Minamitsuru-gun, JP;
Takashi Harada, Minamitsuru-gun, JP;
Masakazu Niwa, Minamitsuru-gun, JP;
Koujirou Sakai, Minamitsuru-gun, JP;
Yasusuke Iwashita, Minamitsuru-gun, JP;
Shinichi Horikoshi, Minamitsuru-gun, JP;
Takashi Harada, Minamitsuru-gun, JP;
Masakazu Niwa, Minamitsuru-gun, JP;
Koujirou Sakai, Minamitsuru-gun, JP;
FANUC Corporation, Minamitsuru-gun, Yamanashi, JP;
Abstract
During motor acceleration control period that starts at time T, if power supply output or supply current exceeds a predetermined level at time T, PWM control in a PWM converter is turned off until a deceleration control period of Tto Tends. As a result, DC link voltage (voltage of a power storage device) at the start of the deceleration control at time Tdrops to provide space for storing regenerative power; since the PWM control in the PWM converter is off during the deceleration control period, the regenerative power can be stored into the power storage device and reused in the next control cycle.