PERMANENT MAGNET-TYPE MOTOR - MITSUBISHI ELECTRIC CORP

Title:

PERMANENT MAGNET-TYPE MOTOR

Document Type and Number:

WIPO Patent Application WO/2018/198217

Kind Code:

A1

Abstract:

The purpose of the present invention is to achieve a permanent magnet-type motor that suppresses worsening of vibration noise of the motor. A permanent magnet type motor (1) is provided with: a stator (12); and a rotor (22) that comprises a rotor core (23) disposed so as to face the inner side of the stator (12) with an air gap (50) therebetween, a permanent magnet (25) disposed in the circumferential direction of the rotor core (23), and a field pole (40) of the rotor core (23) in which the permanent magnet (25) is disposed. The field pole (40) has a radius shorter than that of a circular arc centered on a shaft (24) attached to the inner side of the rotor (22). The field pole (40) has formed therein a plurality of slits (41), the longitudinal axis direction of each of which is the radial direction of the rotor core (23). A gap, between a first center line (42a) located between a plurality of the slits (41) and a second center line (42b) located between a neighboring plurality of the slits (41), expands towards the outer periphery side of the rotor core (23).

Inventors:

TAKIZAWA YUJI (JP)
AKUTSU SATORU (JP)
OKAZAKI MASAFUMI (JP)
SUGI NATSUMI (JP)

Application Number:

PCT/JP2017/016484

Publication Date:

November 01, 2018

Filing Date:

April 26, 2017

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

H02K1/27

Domestic Patent References:

WO2014068753A1	2014-05-08
WO2012102030A1	2012-08-02

Foreign References:

JP2014093852A	2014-05-19
JP2004336999A	2004-11-25
JP2011083168A	2011-04-21
JP2005094968A	2005-04-07
JP2010148161A	2010-07-01
JP2008167583A	2008-07-17
JP2006081336A	2006-03-23
JP2006014450A	2006-01-12

Other References: