Patent ID: 8344567

Claim:
A rotating electrical machine comprising: a stator including an inner peripheral surface; and a rotor provided to be surrounded by the stator and to be rotatable relative to the stator about a rotational axis, the rotor comprising: a shaft rotatable relative to the stator about the rotational axis; a first rotor core connected to the shaft to be rotatable together with the shaft, the first rotor core including a first base portion and a first outer peripheral portion, the first base portion being provided on an outer peripheral surface of the shaft, the first outer peripheral portion being provided on an outer peripheral surface of the first base portion and facing the inner peripheral surface of the stator in a radial direction of the rotor, a maximum length of the first base portion in an axial direction along the rotational axis being shorter than a maximum length of the first outer peripheral portion in the axial direction; and a second rotor core arranged next to the first rotor core in the axial direction and connected to the shaft to be rotatable together with the shaft, the second rotor core including a second base portion and a second outer peripheral portion, the second base portion being provided on the outer peripheral surface of the shaft, the second outer peripheral portion being provided on an outer peripheral surface of the second base portion and facing the inner peripheral surface of the stator in the radial direction, a maximum length of the second base portion in the axial direction being shorter than a maximum length of the second outer peripheral portion in the axial direction.