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1. (WO2018043026) SURFACE MAGNET TYPE MOTOR

Pub. No.:    WO/2018/043026    International Application No.:    PCT/JP2017/028248
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Fri Aug 04 01:59:59 CEST 2017
IPC: H02K 1/22
H02K 1/27
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: TAMAMURA Toshiyuki
玉村 俊幸
TASHIRO Yuichiro
田代 裕一郎
SAITOU Kouichi
斉藤 康一
Title: SURFACE MAGNET TYPE MOTOR
Abstract:
A stator core of a stator has a ring-shaped yoke and multiple teeth radially extending from the inner periphery of the yoke and having circumferentially broadened tooth-tip parts at the tip thereof, and windings are wound around the teeth. A rotor is provided with a rotor core, a shaft, magnets, and a rotor resin part. The multiple magnets held on the rotor core are circumferentially arranged along the outer peripheral surface of the rotor core with a predetermined gap from the tooth-tip parts, and the rotor resin part fixes the multiple magnets to the rotor core. Furthermore, each of the magnets is provided with a first main surface facing the outer peripheral surface of the rotor core and a second main surface facing the tooth-tip part. In this case, the first main surface includes a planar part, and the tooth-tip part and the second main surface include arc-shaped curved surfaces concentric with a magnetic pole surface. In addition, the rotor core and the multiple magnets are integrally formed such that the outer peripheries of the second main surfaces are covered by the rotor resin part.