Electric wire for high frequency, high volume and large current

Abstract

An electric wire contains a conductive wire having at least a groove structured on the surface of the conductive wire, and an additional wire to be filled into the groove. The groove is provided on an outer surface of the conductive wire along a longitudinal direction of the conductive wire. The additional wire is inserted in the groove.

What is claimed is: 
     
       1. An electric wire comprising:
 a conductive wire, which has substantially a quadrilateral cross-sectional shape; and 
 an insulator placed along a longitudinal direction of the conductive wire at a corner of the quadrilateral; 
 a groove provided along the longitudinal direction of the conductive wire at the corner of the quadrilateral; 
 wherein the insulator is placed in the groove. 
 
     
     
       2. The electric wire of  claim 1 ,
 wherein a width of the insulator is less than one third of a width of the conductive wire. 
 
     
     
       3. The electric wire of  claim 1 ,
 wherein the insulator is made of a synthetic resin. 
 
     
     
       4. The electric wire of  claim 1 ,
 wherein insulators are placed at all corners of the quadrilateral. 
 
     
     
       5. The electric wire of  claim 1 , further comprising:
 an additional wire inserted in the conductive wire along the longitudinal direction of the conductive wire; 
 wherein the additional wire comprises a conductive member; 
 wherein the conductive wire and the conductive member are made of different materials; and 
 wherein the conductive member is in contact with the conductive wire. 
 
     
     
       6. A coil comprising the electric wire of  claim 1 , the electric wire being wound on a bobbin so that a corner of a quadrilateral is adjacent to a corner of a next quadrilateral in a cross sectional view. 
     
     
       7. The electric wire of claim 1, wherein a thickness of the insulator at the corner of the quadrilateral is larger than a thickness of the insulator at a side of the quadrilateral. 
     
     
       8. An electric wire comprising:
 a single conductive wire having substantially a quadrilateral cross-sectional shape; and   an insulating layer placed along a longitudinal direction of said single conductive wire, covering at least one corner of said quadrilateral, wherein a thickness of the insulating layer at the corner is thicker than a thickness of the insulating layer at a side of said quadrilateral, and wherein said thickness of the insulator at the corner is less than one third of the thickness of said single conductive wire.   
     
     
       9. The electric wire of claim 8, wherein the insulating layer covers entirely an outer surface of the conductive wire, covering all corners and all sides of the quadrilateral. 
     
     
       10. The electric wire of claim 8, wherein the insulating layer is made of synthetic resin. 
     
     
       11. The electric wire of claim 8 further comprises a groove disposed along the longitudinal direction of the conductive wire at one corner of the quadrilateral, wherein the insulating layer covers the groove. 
     
     
       12. The electric wire of claim 11, wherein the groove is provided at all corners of the quadrilateral and the insulating layer covers entirely an outer surface of the conductive wire, including all corners and all sides of the quadrilateral. 
     
     
       13. A coil comprising the electric wire of claim 8, the electric wire being wound on a bobbin so that a corner of a quadrilateral is adjacent to a corner of a next quadrilateral in a cross sectional view.