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:
Dec. 04, 2001
Filed:
Dec. 16, 1999
Noriyuki Shiba, Tokyo, JP;
Keiichi Fukushima, Ebina, JP;
Takeshi Mitsuhashi, Ebina, JP;
Ikuo Kotani, Ebina, JP;
Abstract
A synchronization control device and a synchronization control method are provided in which it includes controllers Am and As,of a master section and a slave section for accurately synchronizing rotational frequency and rotation phases of driving electric motors Mm and Ms,The controller As,includes rotational frequency detectors Ss,Fs,a master phase counter Cm,and a slave phase counter Cs,and detects at all times both of a rotational frequency and a rotation phase of the electric motors Mm of the master based upon an output of the rotary encoder Pm, and further detects at all times both of a rotational frequency and a rotation phase of the electric motor Ms,of the slave. A phase deviation calculator Hs1 is provided to calculate synchronization phase deviation at all times, and when a switch RYs,is actuated, it corrects an output of the rotational frequency detection means Ss,based upon the phase deviation and matches origins of the electric motors of the master section and the slave section to shift the operation to synchronization control.