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:
Apr. 01, 2008
Filed:
Mar. 06, 2006
Yasuhide Ito, Hamamatsu, JP;
Shinji Santo, Kosai, JP;
Masayuki Kuwano, Kosai, JP;
Toshio Yamamoto, Kosai, JP;
Yoshiki Nakano, Hamamatsu, JP;
Yasuhide Ito, Hamamatsu, JP;
Shinji Santo, Kosai, JP;
Masayuki Kuwano, Kosai, JP;
Toshio Yamamoto, Kosai, JP;
Yoshiki Nakano, Hamamatsu, JP;
Asmo Co., Ltd., Umeda, Kosai-shi, Shizuoka-ken, JP;
Abstract
A stator of a direct current motor includes six magnetic poles. An armature of the direct current motor includes an armature core having eight slots, a plurality of windings wound around the armature core as concentrated windings, and a commutator having twenty-four segments connected to the windings. The plurality of windings are connected to one another to form a single closed loop. The direct current motor further includes an anode power supply brush and a cathode power supply brush that slidably contact the segments. The aspect ratio, which is the ratio of the diameter of the armature core with respect to the length in the axial direction of the armature core is set to a range of 3.2 through 5.6. This increases the constraint torque/mass ratio of the direct current motor.