Patent ID: 7671504
Filing Date: 2010-03-02
Classification: H02K

Abstract:
1. Electric motor comprising: an air-cored winding which is composed of a plurality of single coils made of wire, wherein the single coils overlap each other in an imbricated manner, wherein the single coils are preformed to form an offset at least in a region of two opposite corners; and the single coils having legs, wherein half of the legs are located in a first plane and half of the legs are located in a second plane, and wherein each single coil is, in an unwound form, arranged in a concentric spiral about an axis which extends in a direction perpendicular to a surface of the air-cored winding in a final winding form, so that in the final winding form, the wires of the single coils extend substantially tangentially, and the wires in a neutral zone are bent towards a radial direction thereby producing the offset between the first and second planes.