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:
Oct. 06, 2009
Filed:
Aug. 01, 2006
Shinji Makita, Kakamigahara, JP;
Masayuki Nashiki, Komaki, JP;
Shinji Makita, Kakamigahara, JP;
Masayuki Nashiki, Komaki, JP;
Denso Corporation, Kariya, JP;
Abstract
An ac motor is provided which includes a plurality of looped windings each of which extends in a circumferential direction of a stator. The stator is equipped with N stator pole groups made up of magnetic poles arranged along a circumference thereof. The looped windings are disposed adjacent each other in an axial direction of the stator. The number P of the rotor magnetic poles and the number M of the magnetic poles of the stator are selected to meet a relation of M<(P/2)×N. This structure permits the number of the magnetic poles of the stator to be decreased, which ensures desired air gaps between the magnetic poles of the stator, thus minimizing a leakage of magnetic flux between the magnetic poles of the stator to increase torque to be outputted by the motor.