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:
Jul. 09, 2002
Filed:
Apr. 20, 2001
Noriyuki Shiba, Tokyo, JP;
Toru Akiyama, Kanagawa, JP;
Masakatsu Fujita, Kanagawa, JP;
Hiroyuki Hisada, Kanagawa, JP;
Ikuo Kotani, Kanagawa, JP;
Abstract
A synchronous control device according to the present invention completes an origin matching between a master section and a slave section without causing a phase difference even when a deceleration device is employed in the master section or in the slave section so as to perform an accurate synchronous control. The synchronous control device constantly detects the phase of a shaft of a master electric motor by a phase detector of the master electric motor according to the outputs of a master rotary encoder, and the phase of a shaft of the master machine by a phase detector of the shaft of the master machine according to the outputs of a master rotary encoder and an origin detector of the shaft of the master machine. In the same manner, the phase of a shaft of a slave electric motor is constantly detected by a phase detector of the slave electric motor according to the outputs of a slave rotary encoder, and the phase of a shaft of a slave machine is constantly detected by a phase detector of the shaft of the slave machine according to the outputs of a slave rotary encoder and an origin detector of the shaft of the slave machine. Then a first phase deviation between the shaft of the master machine and shaft of the slave machine by a first phase deviation detector, and a second phase deviation between the master electric motor and the slave electric motor by a second phase deviation detector for the electric motors are calculated. After an origin between the shaft of the master machine and the shaft of the slave machine is matched based on the first phase deviation, continuously an origin between the master electric motor and the slave electric motor is matched based on the second phase deviation so as to perform the synchronous control.