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1. (WO2018079290) FLYING DEVICE

Pub. No.:    WO/2018/079290    International Application No.:    PCT/JP2017/037102
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Sat Oct 14 01:59:59 CEST 2017
IPC: H02K 1/27
B64C 27/08
B64C 39/02
B64D 27/24
H02K 1/22
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: TSUTSUMI Shinichi
堤 慎一
YOSHIKAWA Yuichi
吉川 祐一
KOYAMA Sho
小山 将
NUKADA Keiichiro
額田 慶一郎
UEDA Hiroshi
植田 浩司
NAKADE Yuki
仲出 雄樹
Title: FLYING DEVICE
Abstract:
This flying device comprises: a plurality of rotary blades; an electric motor element which is a drive source for each of the plurality of rotary blades and which rotatably drives a main shaft of the rotary blades; and a drive circuit. The electric motor element includes a stator, a rotor, and a pair of bearings. The stator includes: a stator core including an annular yoke and a plurality of teeth protruding inward of the annular yoke; and stator windings respectively wound around the plurality of teeth of the stator core. The rotor includes: a cylindrical permanent magnet part which is positioned inward of the stator core via a gap and which is positioned opposite to the plurality of teeth; a rotor yoke part which is inscribed in a cylindrical inner wall surface of the permanent magnet part; and a shaft which is fixed on the axial center of the rotor yoke part and which is connected to the main shaft. The pair of bearings rotatably fix the shaft and are positioned on both sides, in the rotation axis direction, of the rotor. The permanent magnet part includes P number of polar-anisotropic magnetic poles, wherein the P number is an even number and the weight of the rotor yoke part is less than the weight of the permanent magnet part. The drive circuit part controls a stator current flowing through the stator windings.