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. 13, 2001
Filed:
Jul. 27, 1999
Minebea Co., Ltd., Nagano-Ken, JP;
Abstract
A stator structure enables a claw pole motor to be reduced in diameter and to highly increase its performance. In a stator structure of the claw pole stepping motor comprising a stator that constitutes magnetic circuits in yokes,and,made by sheet metal working of a soft magnetic steel plate and a rotor that is disposed inside the stator for rotation; pole teeth,made of soft magnetic material are provided as separate parts independent of the yokes,and,, and held at the inner circumference of a bobbin,made of polymeric material, thereby allowing easy manufacturing of a long stator or a stator with a small diameter for which the pole teeth,have difficulty, otherwise, in being well organized, at the same time allowing the area of cross section of the pole teeth,to be arbitrarily determined so as not to cause magnetic saturation, allowing to provide a high output power, allowing to determine the pole teeth,in the bobbin,so as not to disorder the arrangement of the pole teeth,which are responsible for the step angle accuracy, and thus allowing to accomplish high accuracy in step angle accuracy.