| 摘要 |
<p>The present invention provides a helical core and fabricating method thereof, by which a material and weight for fabrication of a core are reduced and by which a fabrication process is simplified. The present invention has a multi-layer structure configured by helically winding to stack a steel plate core from a bottom layer to a top layer and includes the steel plate core blanked in two rows from an electrical steel sheet to form a pair of bases confronting each other in a width direction and teeth protruding from each of the bases to alternately cross with each other, wherein to prevent an unwinding of the steel plate core in a direction reverse to a rotation of the steel plate core and a loosening between the stacked layers of the steel plate core in helically winding to stack the steel plate core, an engaging protrusion is provided to each upper or lower surface of the teeth of the steel plate core and an engaging recess is provided to each lower or upper surface of the teeth of the steel plate core to correspond to the engaging protrusion, wherein a recess is provided to the base to reduce stress in winding the steel plate core, and wherein both corners of an end of each of the teeth is chamfered straight or round to form a 'C' shape to reduce vibration and noise generated by cogging torque on driving a motor.</p> |
