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. 19, 2005
Filed:
Aug. 28, 2003
Toshinori Tanaka, Tokyo, JP;
Yuusuke Matsui, Tokyo, JP;
Keiichi Fukazawa, Tokyo, JP;
Satoru Akutsu, Tokyo, JP;
Kengo Fujimoto, Tokyo, JP;
Katsumi Ohata, Tokyo, JP;
Takeshi Sugiyama, Tokyo, JP;
Toshinori Tanaka, Tokyo, JP;
Yuusuke Matsui, Tokyo, JP;
Keiichi Fukazawa, Tokyo, JP;
Satoru Akutsu, Tokyo, JP;
Kengo Fujimoto, Tokyo, JP;
Katsumi Ohata, Tokyo, JP;
Takeshi Sugiyama, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A stator core is formed into a cylindrical shape, 3n teeth are disposed at a predetermined pitch in a circumferential direction where n is a positive integer, and slots are formed between adjacent pairs of the teeth so as to open onto an inner circumferential side. A stator coil is installed as a concentrated winding in the stator core. A rotor is rotatably disposed inside the stator and 2n permanent magnets are disposed at a predetermined pitch in a circumferential direction on an outer peripheral portion of a shaft. The stator core is constructed such that a slot opening (d) and a slot pitch (p) at an inner circumferential surface of the stator core satisfy an expression 0.1≦d/p≦0.3.