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:
Nov. 16, 1993
Filed:
Feb. 06, 1992
Applicant:
Inventor:
Akio Yasuda, Yokohama, JP;
Assignee:
Matsushita Electric Industrial Co. Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318696 ; 318700 ; 318705 ; 318711 ; 318715 ; 318719 ; 318721 ;
Abstract
A pulse motor control circuit for starting up and synchronizing a sync pulse motor (for use typically in factory automation or precise machining) with an external sync signal. The control circuit applies a starting drive pulse signal to start up and drive the motor to place it in synchronism with the external signal, and then switches the drive pulse signal to the external signal for the synchronous revolution of the motor. The starting drive pulse signal has a variable frequency which is varied from a frequency in the self-starting region to that of the external sync signal.