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:
Aug. 20, 1996
Filed:
Feb. 09, 1995
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A direct-current motor is provided with a field pole including a main magnetic pole having an axial length of Lm and an auxiliary magnetic pole; and an armature core which is rotatably supported opposite to the inner peripheral side of the main magnetic pole and rotated by the excitation force of the field pole and has an axial length of Lc. The direct-current motor which satisfies the relation of Lm>Lc is such that the corner portions of the main magnetic pole are formed so that the relation between the axial length Ln of the straight section of the main magnetic pole and Lc satisfies 1.15 Lc>Ln.gtoreq.Lc. Therefore, a direct-current motor can be made more lightweight without changing its output characteristics by cutting down the corner portions of the main magnetic pole.