Patent ID: 7586232

Claim:
A flat radially interacting electric drive comprising a flat stator, an axle and a magnetized flat rotor, wherein: (i) said stator being made of a composite structure comprising a layer made of ferromagnetic material serving as a stator core and placed within two layers of circuit boards; (ii) the first of said layers of circuit board comprising circumferentially arrayed groups of traces that are unidirectional segments of zigzag lines with a path directed radially, while the second of said layers of circuit board comprising circumferentially arrayed groups of traces which in transparent view being opposite unidirectional segments of the same zigzag lines; (iii) each of said traces located at said first layer having nodes coincided with corresponding nodes of each of said traces located at said second layer in transparent view; (iv) each of said traces located at said first layer being electrically connected at said nodes with each said corresponding nodes of said traces located at said second layer, thus both said layers forming circumferentially arrayed spatial continuous zigzag lines serving as coils with magnetic axes being directed radially; (v) said coils being electrically connected thus forming a stator winding with alternated polarity coils; (vi) said flat rotor comprising circumferentially arrayed flat magnets with radially directed magnetic axes.