Corona-resistant self-lubricating magnet wire

Abstract

A corona-resistant self-lubricating magnet wire includes a conductor wire, an insulator sheath wrapped around the conductor wire, and an outer layer of a lubricating material coated on the sheath. The lubricating material is composed of a polyamideimide resin and a polymeric material selected from a group consisting of polyethylene and Teflon.

We claim:  
     
         1 . A magnet wire comprising: 
 a conductor wire;    an insulator sheath wrapped around said conductor wire; and    an outer layer of a lubricating material coated on said sheath, said lubricating material being composed of a polyamideimide resin and a polymeric material selected from a group consisting of polyethylene and Teflon.    
     
     
         2 . The magnet wire of  claim 1 , wherein the weight ratio of said polyamideimide resin to said polymeric material of said lubricating material is in a range of from 100:0.5 to 100:10.  
     
     
         3 . The magnet wire of  claim 1 , wherein the weight ratio of said polyamideimide resin to said polymeric material of said lubricating material is in a range of from 100:1 to 100:6.  
     
     
         4 . The magnet wire of  claim 1 , wherein said sheath includes a corona-resistant layer of a corona-resistant resin that is coated on said conductor wire, and an insulating layer of a thermal-resistant resin that is coated on said corona-resistant layer.  
     
     
         5 . The magnet wire of  claim 4 , wherein said corona-resistant resin is made from a modified polyesterimide.  
     
     
         6 . The magnet wire of  claim 4 , wherein said thermal-resistant resin is polyamideimide.  
     
     
         7 . The magnet wire of  claim 1 , wherein said conductor wire is made from a metal material selected from a group consisting of copper and aluminum.  
     
     
         8 . The magnet wire of  claim 1 , wherein said polymeric material is polyethylene having a molecular weight in a range of from 1000 to 50000.  
     
     
         9 . The magnet wire of  claim 1 , wherein said polymeric material is polyethylene having a molecular weight in a range of from 2000 to 10000.