Rotor, rotary electric machine, compressor, and refrigeration device

Abstract

To provide a rotor, a rotary electric machine, a compressor, and a refrigeration device in which the strength of the rotor against a centrifugal force is improved, and deterioration of a magnetic characteristic of a magnetic path can be suppressed.SOLUTION: A rotor 300 includes a rotor core 310 that is disposed on a rotary shaft 110 and rotates about an axis center AC, and a non-magnetic sleeve 350 that is disposed outside the rotor core 310. The rotor core 310 includes multiple first regions 320 that are arranged separately in a circumferential direction, and second regions 330 that are arranged between the first regions 320 in the circumferential direction. The second region 330 includes a magnetic path 331 sectioned from the first region 320 with a first gap portion 314. An inner surface 351 of the sleeve 350 is placed in contact with an outer surface 321 of the first region 320. A first stress which is the largest one of stresses applied in the first region 320 is larger than a second stress which is the largest one of stresses applied in the second region 330.SELECTED DRAWING: Figure 4

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