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:
Jan. 09, 2001
Filed:
Nov. 13, 1998
Chang Keun Jun, Kyungki-Do, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, KR;
Abstract
A disk-type brushless single-phase DC motor comprising a single armature coil attached to a stator yoke of a stator, the armature coil having a closed loop structure. The armature coil has a plurality of uniformly spaced apexes corresponding in number to ½ of the number of poles in a rotor magnet. The armature coil also has sides each connecting neighboring apexes of the armature coil while being radially curved. Cogging generating protrusions are protruded from the stator yoke at positions spaced in a rotation direction of the rotor magnet from respective apexes of the armature coil by a desired angle. The armature coil having a closed loop structure maximizes an effective coil torque generated whereas the cogging generating protrusions generates an optimum cogging torque. Accordingly, it is possible to provide a stable drive performance even when a smaller amount of current is supplied, while achieving an improvement in assembling workability.