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:
Jan. 22, 1985
Filed:
Feb. 18, 1983
Applicant:
Inventor:
Shigeyuki Araki, Komae, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
318696 ; 318685 ;
Abstract
A control system for a stepping motor in which a current (or voltage) to be fed to each excitation coil of the motor at the timing for an m-phase excitation is different from a current (or voltage) to be fed at the timing for an n-phase excitation. This difference in current (or voltage) causes a same torque to develop both in the m-phase excitation and n-phase excitation.