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1. (WO2013121611) ROTOR CORE, MOTOR, AND METHOD FOR MANUFACTURING MOTOR

Pub. No.:    WO/2013/121611    International Application No.:    PCT/JP2012/072967
Publication Date: Fri Aug 23 01:59:59 CEST 2013 International Filing Date: Sat Sep 08 01:59:59 CEST 2012
IPC: H02K 1/27
H02K 15/02
Applicants: NIDEC CORPORATION
日本電産株式会社
TANAKA, Takeshi
田中 武
Inventors: TANAKA, Takeshi
田中 武
Title: ROTOR CORE, MOTOR, AND METHOD FOR MANUFACTURING MOTOR
Abstract:
A rotor core wherein the magnetic body core plates that extend in the direction orthogonal to a central shaft that extends up and down comprise multiple steel plates stacked in the axial direction. Furthermore, the rotor core has multiple magnetic pole parts arranged in the circumferential direction. At least some of the core plates have claw parts that protrude from the magnetic pole parts in the circumferential direction, and outside connecting parts that connect the adjacent magnetic pole parts at the outside of the claw parts in the radial direction. The claw parts suppress displacement of the magnets to the outside in the radial direction due to centrifugal force. The outside connecting parts suppress deformation of the rotor core due to centrifugal force. In particular, the outside connecting parts suppress displacement of the claw parts themselves due to centrifugal force. Accordingly, displacement of the magnets can be further suppressed.