Patent ID: 7982358
Filing Date: 2011-07-19
Classification: H02K

Abstract:
1. A bobbin assembly for use in an electrical machine, the bobbin comprising: an annular rigid sleeve defining an outside diameter; a first end cap formed of thin sheet material having inner flaps, outer flaps, and a side wall positioned between the inner flaps and outer flaps, the inner flaps being formed inward to fit over the outside diameter of the rigid sleeve; a second end cap formed of thin sheet material having inner flaps, outer flaps, and a side wall positioned between the inner flaps and outer flaps, the inner flaps being formed inward to fit over the outside diameter of the rigid sleeve; an annular excitation winding having an inside and an outside diameter and opposing sides surfaces; and wherein the inner flaps of the first and second end caps are positioned between the outside diameter of the rigid sleeve and the inside diameter of the annular excitation winding, the outer flaps of the first and second end caps extend over the outside diameter of the annular excitation winding, and the side walls of the first and second end caps extend over the opposing side surfaces of the excitation winding.