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:
Mar. 20, 1990
Filed:
Mar. 28, 1989
Applicant:
Inventor:
Ted T Lin, Cupertino, CA (US);
Assignee:
Linex Technology Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 / ; 310254 ; 318696 ;
Abstract
Hybrid stepping motor apparatus that produces a step angle of 1/K.sub.p times the pitch angle .DELTA..theta..sub.p of the stator on rotor teeth, where K.sub.p is the number of phases for the motor, using a plurality of stator poles whose center-to-center angular spacings are not uniform, and depend on the number of stator poles used. In one embodiment with M poles, the first M-1 center-to-center pole angular spacings are equal to a first angle A, and the Mth center-to-center pole angular spacing is an angle B with .vertline.A-B.vertline.=m.DELTA..theta..sub.p, where m is a positive integer.