Rotary Electrical Machine and Vehicle Driving Device Including Rotary Electrical Machine

Abstract

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.

Dependencies are inferred from the claim text.