Patent ID: 6060973
Filing Date: 2000-05-09
Classification: H01F

Abstract:
An electromagnetic coil, comprising:a winding member having a predetermined length;a wire wound around a surface of said winding member, said wire forming a first winding portion and a second winding portion,wherein said first winding portion is wound around a first length of said winding member, said first winding portion including a plurality of winding layers overlapped with each other and inclined at a predetermined angle to the first length of said winding member, each of the winding layers including a collection of turns of the wire, andsaid second winding portion is wound around a second length of said winding member, said second winding portion including a plurality of winding layers overlapped with each other and inclined at a predetermined angle to the second length of said winding member continuing from the first length, each of the winding layers including a collection of turns of the wire,wherein the winding layers develop a high voltage through electromagnetic induction, andwherein the second winding portion includes adjacent winding layers with the number of turns t.sub.H given by the following equation:t.sub.H .ltoreq.n.sub.T /V.sub.OUT .times.180where n.sub.T is a total number of turns of said first and second winding portions, and V.sub.OUT is an output voltage of the electromagnetic coil.