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. 10, 1998
Filed:
Sep. 26, 1996
Tsuneo Sugiura, Nagano-ken, JP;
Tamagawa Seiki Kabushiki Kaisha, Nagano-ken, JP;
Abstract
A hybrid stepping motor according to the present invention has coils wound on stator yokes arranged on a fixed shaft or coils arranged on the inner peripheral surface of stator yokes. For this reason, the coils can be easily formed, a coil mounting density higher than that by a conventional technique can be obtained, and cost reduction can be obtained. An auxiliary magnetic plate and an auxiliary magnet are arranged on both the sides of a stator yoke member to form magnetic circuits at both the ends of the stator yoke member. Therefore, motors having various numbers of phases can be obtained, and a core are partially or entirely constituted by a non-layered structure, thereby improving torque/current characteristics.