MOTOR

PURPOSE:To improve the accuracy of the inner diameter of the laminated core of a motor and improve its rigidity, by welding the arbitrary place of the teeth part of the laminated core through the use of a laser-welding, and especially, by welding the opposite surface of the teeth part to the rotor of the motor while adopting the inner diameter of the laminated core as a reference in case of its welding. CONSTITUTION:In a motor having a laminated core (i) provided with a plurality of teeth parts (d), surfaces (a) of the laminated core (i) which are opposed to the rotor of the motor are welded by a laser-welding. Since the surface (a) can be welded while the inner diameter of the core is adopted as a reference by virtue of the use of the laser-welding, the characteristics of the motor are uniformalized by the improvement of the accuracy of its inner diameter. Also, by the possibility of the welding of an arbitrary place, the shape of the core wherein the characteristic of the motor is prior to all others is made possible, and the size and weight of the motor can be reduced. Further, since the opposite surface of the core to the rotor can be fixed, the beat sound and the oscillation of the core are prevented, and thereby, the motor having a low noise and a low oscillation can be obtained.