Patent ID: 11837920

Abstract:
A rotor includes a rotor core having magnet insertion holes in a number corresponding to a pole number, and a center hole. The rotor core has first slits and ribs alternately arranged in the circumferential direction along a periphery of the center hole, and second slits on an outer side with respect to the first slits in the radial direction. The first slits and the second slits are both equal in number to half or an integer multiple of the pole number. Each second slit is formed to cover the rib from an outer side in the radial direction. Each first slit has a length A1 in the circumferential direction and a width A2 in the radial direction. Each second slit has a length B1 in the circumferential direction and a width B2 in the radial direction. A1>A2, B1>B2, and A1>B1 are satisfied.