Abstract: The present invention provides a rotary electric machine which suppresses a temperature rise of bearings by reducing heat transfer from internal air to the bearings and heat conduction from a rotor core, and improves the lubrication life of the bearings. A rotary electric machine of the present invention comprises a rotor including a shaft; a stator placed facing the rotor with a certain gap (an air gap) therebetween and supported by a stator frame; bearings which sustain the shaft; and end brackets which hold the bearings, wherein one of the end brackets includes a heat insulating layer on an inner side or an outer side of the machine to prevent heat from flowing into the bearings.

Abstract: The present invention provides a rotary electric machine which suppresses a temperature rise of bearings by reducing heat transfer from internal air to the bearings and heat conduction from a rotor core, and improves the lubrication life of the bearings. A rotary electric machine of the present invention comprises a rotor including a shaft; a stator placed facing the rotor with a certain gap (an air gap) therebetween and supported by a stator frame; bearings which sustain the shaft; and end brackets which hold the bearings, wherein one of the end brackets includes a heat insulating layer on an inner side or an outer side of the machine to prevent heat from flowing into the bearings.