US Patent No. 10,804,760

ROTOR AND MOTOR


Patent No. 10,804,760
Issue Date October 13, 2020
Title Rotor And Motor
Inventorship Koutarou Suzuki, Yamanashi (JP)
Assignee FANUC CORPORATION, Yamanashi (JP)

Claim of US Patent No. 10,804,760

1. A rotor comprising:a cylindrical rotor core fixed to an outer peripheral side of a rotary shaft rotatable about an axis center, the rotor core including:
multiple first slots arranged at substantially regular intervals in a peripheral direction of the rotor core and penetrating the rotor core in an axis direction of the rotary shaft; and
multiple second slots formed at an inner position of the rotor core with respect to the first slots, arranged at substantially regular intervals in the peripheral direction of the rotor core, and penetrating the rotor core in the axis direction of the rotary shaft, wherein
each of the first slots and each of the second slots are positioned at different positions in terms of phases in the peripheral direction of the rotor core such that for each second slot, in a front view, a straight line from the axis center through the center of the second slot and extending in a radially outward direction to the outside of the cylindrical rotor core does not intersect any of the first slots; and
a secondary conductor including:
multiple conductor bars arranged in the first slots and the second slots; and
a pair of ring-like end rings arranged at opposite end surfaces of the rotor core and connecting end portions of the multiple conductor bars.