ROTARY ELECTRICAL MACHINE AND VEHICLE DRIVING DEVICE EQUIPPED WITH ROTARY ELECTRICAL MACHINE

WIPO Patent Application WO/2023/132093

A1

The purpose of the present invention is to provide a rotary electrical machine having improved cooling performance.　A rotary electrical machine according to the present invention comprises: a stator 301; a rotor 302; and a cooling passage through which a refrigerant for cooling the stator 301 and the rotor 302 flows. The cooling passage is provided with: a refrigerant inlet 343 through which the refrigerant is introduced; stator cooling passages 3013 in communication with the refrigerant inlet 343; a rotor cooling passage 304; and a connection passage 315 which connects the stator cooling passages 3013 with the rotor cooling passage 304. The rotor cooling passage 304 is provided with refrigerant outlets 306a, 306b through which the refrigerant is discharged radially outside the rotor 302 in association with rotational motion of the rotor 302. A plurality of the stator cooling passages 3013 are arranged in the circumferential direction of a stator core 3010. The terminal end of each of the stator cooling passages 3013 is connected to the upstream side of the connection passage 315 at a position opposite to the refrigerant inlet 343 in the axial direction and in the circumferential direction.

FUJIMA YURI (JP)
HORI MASAHIRO (JP)
ITAYA TAKAKI (JP)
GOTO HIDEAKI (JP)

PCT/JP2022/028644

July 13, 2023

July 25, 2022

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HITACHI ASTEMO LTD (JP)

H02K9/19; H02K5/20; H02K11/30

WO2015186466A1	2015-12-10
WO2016067352A1	2016-05-06

JP2020054074A	2020-04-02
JP2016179799A	2016-10-13
JP2002034206A	2002-01-31
US20130119830A1	2013-05-16

POLAIRE I.P.C. (JP)

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