ROTOR, ELECTRIC MOTOR, FAN, AIR CONDITIONER, AND METHOD FOR MANUFACTURING ROTOR

WIPO Patent Application WO/2021/171420

A1

A rotor (1) comprises a rotating shaft (25), a rotor core (10) comprising a first core part (21) and a second core part (22) positioned adjacent to each other in the circumferential direction, and a permanent magnet (20) provided to the first core part (21). The second core part (22) has a virtual magnetic pole (P2) formed therein. The first core part (21) has a void (15) that is formed nearer the inside of the rotor core (10) in the radial direction than the permanent magnet (20). The void (15) has a first portion (15a) that widens in the circumferential direction toward the rotating shaft (25). A radially outward-facing surface (15c), which is positioned furthest inside in the radial direction in the void (15) and defines the void (15), is positioned closer to the inside in the radial direction than a portion (22a) furthest inside in the radial direction in the second core part (22), or alternatively, a boundary between the void (15) and a hollow portion (10c) of the rotor core (10) surrounding the rotor (25) does not exist.

JPS6031406	[Title of the device] The rotation child of an axial void type electric motor
JP2003339129	PERMANENT MAGNET DYNAMO-ELECTRIC MACHINE

ASO HIROKI (JP)
WATANABE TAKANORI (JP)
TSUCHIDA KAZUCHIKA (JP)
SHIMOKAWA TAKAYA (JP)
TAKAHASHI RYOGO (JP)

PCT/JP2020/007749

September 02, 2021

February 26, 2020

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MITSUBISHI ELECTRIC CORP (JP)

H02K1/22; H02K1/27

WO2019026273A1	2019-02-07
WO2017183162A1	2017-10-26
WO2020003341A1	2020-01-02

JP2012016130A	2012-01-19
JP2011103759A	2011-05-26

YAMAGATA Yoichi et al. (JP)

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