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:
Jul. 20, 2010
Filed:
Jun. 18, 2008
Toshio Ishikawa, Hitachinaka, JP;
Minoru Yabuki, Ibaraki, JP;
Yoshihisa Ishikawa, Hitachinaka, JP;
Kazuo Tahara, Hitachi, JP;
Toshio Ishikawa, Hitachinaka, JP;
Minoru Yabuki, Ibaraki, JP;
Yoshihisa Ishikawa, Hitachinaka, JP;
Kazuo Tahara, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Stator claw poles are disposed at a stator core at a position facing opposite a rotor so as to alternately range from the two sides along the axial direction. With a plurality of magnetic poles thus formed, the distance by which the gap between the front end portions of the stator claw poles and the stator outer circumference ranges is increased, which, in turn, reduces the reactance guided to a stator coil. It is ensured that the magnetic reluctance manifesting between the front end portions of the stator claw poles and an enclosing member that holds the stator core, facing opposite the centers of the claw poles along the circumferential direction, is greater than the magnetic reluctance manifesting between the front portions and the stator core enclosing member facing opposite the front end portions.