MANUFACTURE OF STATOR FOR INDUCTION MOTOR

摘要

PURPOSE:To eliminate the influence of machined burr or strain to the accuracy of an inserting hole of a rotor by coupling adjacent poles by a stepdown portion from the inner periphery of a pole shoe, securing the poles to a stator yoke and then delecting the coupling part. CONSTITUTION:Four poles 8 are coupled with each other at portions 8a' stepped down from the inner peripheral surface of a pole shoe 8a at both sides of the pole shoe 8a. A stator yole 9 is formed substantially in a rectangular frame shape, and the opposite ends of the shoes 8a of the poles 8 are pressfitted fixedly in the state that the four poles 8 are coupled with each other with a recess formed at the inner side. Then, the portion 8a' for coupling the four poles 8 secured to the yoke 9 is separated to comlete the stator.