Patent ID: 7990013
Filing Date: 2011-08-02
Classification: H02K

Abstract:
1. A slotless motor, comprising: a rotor having a permanent magnet mounted along a rotating axis; a stator formed with a stator coil inside a core, said rotor being rotationally mounted inside said stator, the stator coil further comprising at least one pair of unit coil bodies, each unit coil body being formed from an insulated conductor wound in at least one coil winding defining a geometric form with opposed distal ends, and each unit coil body of each pair being arranged to face the other unit coil body of said pair in an arcuate configuration with overlapping opposed distal ends, the overlapping distal ends of each unit coil body of each pair being joined together to form a circular coil body; wherein the stator coil further comprises a plurality of pairs of unit coil bodies, said pairs of unit coil bodies being joined together to form circular coil bodies of progressively increasing inner diameters, and circular unit coil body pairs of smaller diameters are inserted coaxially into circular unit coil body pairs of larger diameters; wherein each circular coil body of is formed with one unit coil body of smaller horizontal width overlapped at the distal ends by the distal ends of another unit coil body having a larger horizontal width.