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:
Oct. 06, 1998
Filed:
Oct. 17, 1995
Applicant:
Inventor:
Mitsuo Sasaki, Atsugi, JP;
Assignee:
Unisia Jecs Corporation, Atsugi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318685 ; 318254 ;
Abstract
A step motor driving method employing an electric circuit operable on a supply voltage applied thereto for generating a step drive signal having a variable on-duty ratio to drive the step motor. A PWM control is made to change the step drive signal on-duty ratio. The the step drive signal on-duty ratio is increased to compensate for a supply voltage drop.