Patent ID: 8232692
Filing Date: 2012-07-31
Classification: H02K

Abstract:
1. An induction motor that includes a stator having ventilation through-holes for allowing the passage of cooling air at several locations along an outer circumference, the ventilation through-holes extending along a central axial direction, and a rotor inserted inside an inner circumference of the stator, the induction motor comprising: a rotation detector for detecting rotation of the induction motor, the rotation detector being attached to an unloaded side of a shaft to which the rotor is fixed; a heat dissipating disc for dissipating heat generated from the rotor, the heat dissipating disc being attached to an end of the unloaded side of the shaft; a cooling fan for forcibly cooling the heat dissipating disc with outside air; and a partitioning plate which has a through-hole at its center so that the cooling air flows toward the disc surface of the heat dissipating disc; wherein the heat dissipating disc is disposed between the rotation detector and the cooling fan.