ROTARY ELECTRIC MACHINE AND METHOD FOR MANUFACTURING THE SAME

To optimize stress in a radial direction of a stator core that can be caused by difference in a linear expansion coefficient between the stator core and a support member.SOLUTION: A rotary electric machine includes: a stator having a stator core formed of a first metal material and having a teeth unit and a coil wound around the teeth unit; a support member formed of a second metal material having a linear expansion coefficient higher than that of the first metal material and supporting the stator; a rotor arranged coaxially with the stator and having a gap in a radial direction with respect to the stator; and an annular portion positioned between the stator core and the support member in a radial direction and fixed to the stator core by casting. The annular portion is formed by a plurality of materials including a first material having a linear expansion coefficient lower than that of the first metallic material and a second material having a linear expansion coefficient higher than that of the first metal material.SELECTED DRAWING: Figure 2 【課題】固定子コアと支持部材との間の線膨張係数の差に起因して生じうる固定子コアの径方向の応力の最適化を図る。【解決手段】第１金属材料により形成されかつティース部を有する固定子コアと、ティース部に巻回されるコイルとを有する固定子と、第１金属材料よりも線膨張係数の高い第２金属材料により形成され、固定子を支持する支持部材と、固定子と同軸に配置され、固定子に対して径方向に隙間を有する回転子と、径方向で固定子コアと支持部材との間に位置し、固定子コアに鋳包みで固定される環状部位と、を備え、環状部位は、第１金属材料よりも線膨張係数が低い第１材料と、第１金属材料よりも線膨張係数が高い第２材料とを含む複数の材料から形成される、回転電機が開示される。【選択図】図２