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:
Feb. 05, 2008
Filed:
Dec. 02, 2004
Yutaro Kaneko, Yokohama, JP;
Yutaro Kaneko, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A rotor () for a rotary electric machine () comprises a rotation shaft (), and a plurality of rotor cores (-) fixed to the rotation shaft () and axially split. The rotor cores (-) have outer peripheral surfaces (A-A) with a circular cross section. Permanent magnets () extending through the rotor cores (-) are arranged at equal circumferential intervals. Voids (B-B) extending axially through the rotor cores (-) are formed between the outer peripheral surfaces (A-A) and the permanent magnets (). The voids (B-B) of two adjacent rotor cores (-) are formed at circumferentially different positions, thereby being capable of suppressing the cogging torque without introducing a reduction in output torque.