Magnetic device including winding and insulators, and power conversion device using the same

Abstract

A magnetic device includes a winding, and insulators by which the winding is surrounded. Each of the insulators is in contact with the winding. A gap exists between each two adjacent of the insulators in a winding direction of the winding.

What is claimed is: 
     
         1 . A magnetic device comprising:
 a winding; and   insulators by which the winding is surrounded, each of the insulators being in contact with the winding, a gap existing between each two adjacent of the insulators in a winding direction of the winding.   
     
     
         2 . The magnetic device according to  claim 1 ,
 wherein the insulators include a first insulator and a second insulator.   
     
     
         3 . The magnetic device according to  claim 2 ,
 wherein the insulators further include a third insulator.   
     
     
         4 . The magnetic device according to  claim 1 ,
 wherein the winding includes a pair of linear portions that extend in a linear direction when viewed from a winding axis direction of the winding,   a length of each of the pair of linear portions is longer than ¼ of a length of one turn of the winding, and   two of the insulators are in contact with the winding along the linear direction.   
     
     
         5 . The magnetic device according to  claim 2 ,
 wherein the winding includes a first portion that extends in a first direction when viewed from a winding axis direction of the winding, and a second portion that extends in a second direction and is shorter than the first portion, and   the gap between one end of the first insulator and one end of the second insulator is located beside the second portion.   
     
     
         6 . The magnetic device according to  claim 2 ,
 wherein the winding has a corner when viewed from a winding axis direction of the winding, and   the gap between one end of the first insulator and one end of the second insulator is located beside the corner.   
     
     
         7 . The magnetic device according to  claim 2 ,
 wherein one end of the first insulator and one end of the second insulator oppose each other through the gap, and   the one end of the first insulator and the one end of the second insulator each have a stepped end face.   
     
     
         8 . The magnetic device according to  claim 2 ,
 wherein one end of the first insulator and one end of the second insulator oppose each other through the gap,   the one end of the first insulator has a recess, and   the one end of the second insulator has a protrusion that engages with the recess of the first insulator.   
     
     
         9 . The magnetic device according to  claim 1 , further comprising:
 another winding outside of the winding,   the insulators being bobbins around which the other winding is wound.   
     
     
         10 . The magnetic device according to  claim 1 ,
 wherein the gap is larger than 0 mm and equal to or less than 3 mm.   
     
     
         11 . A power conversion device comprising:
 the magnetic device according to  claim 1 ; and   a power conversion circuit that is connected to the winding.