Method of producing a stator yoke of a small-sized motor

Details Method of producing a stator yoke of a small-sized motor Method of producing a stator yoke of a small-sized motor

H - Electricity

02

K

26/113

H02K 15/00 (2006.01)

Patent

CA 1177232

ABSTRACT OF THE DISCLOSURE A method or producing a stator yoke of a motor, such as an inner rotor type stepper motor, the yoke having a multiplicity of polar teeth. The method comprises the steps of forming an intermediate blank which has an outer cylindrical portion and an inner cylindrical portion extend- ing in the same direction, effecting a shearing on the outer peripheral surface of the inner cylindrical portion to cut out a multiplicity of polar teeth at a constant pitch, and effecting punching to deepen and widen portions between the bases of adjacent polar teeth.

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