Honda Motor Co., Ltd.
Rotary electric machine

Abstract:

A rotary electric machine of the embodiment includes a stator having a cylindrical stator core and a coil attached to the stator core, and a rotor disposed on a radially inward side of the stator, in which the rotor includes a rotor core having a rotor internal flow path through which a refrigerant can flow by axial cooling, and an end surface plate disposed at an end portion in an axial direction of the rotor core, the end surface plate includes a refrigerant flow hole which communicates with the rotor internal flow path, and a refrigerant passage groove which connects together the refrigerant flow hole and an outer circumferential edge of the end surface plate, and a radially outer groove width is equal to or smaller than a radially inner groove width in the refrigerant passage groove when viewed from the axial direction.