| 摘要 |
PROBLEM TO BE SOLVED: To provide an embedded permanent magnet type rotary electric machine in which cooling effects of permanent magnets can be enhanced by cooling directly the permanent magnets with a cooling medium.SOLUTION: The embedded permanent magnet type rotary electric machine comprises: a stator 10 having an armature winding 15; a rotator 20 that has rotor iron cores 21, which is constituted by laminating magnetic material plates cylindrically and provided rotatably inside the stator 10, and has a plurality of magnet storage holes 25 penetrating through in a laminating direction of the magnetic material plates of the rotor iron core 21 formed at predetermined positions in a circumferential direction; and a plurality of permanent magnets 23 stored in the plurality of magnet storage holes 25 respectively. In each permanent magnet 23, a part corresponding to outside in a radial direction of the rotor iron core 21 is fixed to the rotor iron core 21 in the magnet storage hole 25. A refrigerant passage 27 is formed in a shaft direction of the rotor iron core 21, between the rotor iron core 21 and the magnet, in a part corresponding to the inside in the radial direction of the rotor iron core 21. At an exposed part 21a of the rotor iron core 21 in the refrigerant passage 27, a plurality of protruding parts 28 are arranged, which are caused by shear droop 29 generated during press processing of the magnetic material plates, in a direction orthogonal to a flowing direction of a cooling medium.SELECTED DRAWING: Figure 7 |
