Segmented stator core for an electric motor

A method of forming a stator core for constructing a stator of a motor, the method comprising:

• forming a first split core and a second split core of the stator core from one electric steel plate having a rectangular shape, wherein:
• the first split core with a first plurality of yoke parts is linearly arranged along a first long side portion of the electric steel plate having a rectangular shape;
• the second split core with a second plurality of yoke parts is linearly arranged along a second long side portion opposite to the first long side portion, and a first plurality of teeth parts of the first split core and a second plurality of teeth parts of the second split core oppose each other and are interleaved to be alternately arranged along a longitudinal direction of the electric steel plate;
• wherein each of the first and second split cores comprises:
• a plurality of yoke parts positioned adjacent to each other;
• a plurality of teeth parts respectively protruding from the plurality of yoke parts in an inward direction;
• cutting parts cut between adjacent yoke parts and each comprising a parallel section aligned to be parallel with a side surface of a corresponding teeth part and an inclined section extending at an angle from the parallel section;
• and
• connection parts respectively connecting adjacent yoke parts such that the adjacent yoke parts are rotatable with respect to the connection part, and
• wherein the plurality of yoke parts comprises an inner surface portion having a convex circular arc shape, and
• wherein a rotor accommodation hole configured to accommodate the rotor to be rotatable therein is provided in an inner surface of the stator core, and
• the rotor accommodation hole defined by inner end surfaces of the plurality of teeth parts having a circular arc shape, and
• wherein the inner surface portion of the plurality of yoke parts and the inner end surfaces of the plurality of teeth parts have a same curvature radius.