Patent ID: 11025143

Abstract:
A method includes forming a first wire layer wound on the insulator and a second wire layer wound on the first wire layer by winding the wire on the insulator. If (L1+D)tan(θ/2)cos(θ/2)−A cos(θ/2)>D, the first wire layer is formed by winding the wire on an upper surface of the step portion, where A is B/2+(1+√3/2)D, B is a width of the insulator, D is a wire diameter, θ is an angle formed by the central axes of circumferentially adjacent teeth, L1 is a distance from a central axis of the stator to an end of the upper surface of the step portion on the inner side in the radial direction, and L2 is a distance from the central axis of the stator to an end of the upper surface of the step portion on the outer side in the radial direction.