Electrically powered pump

Abstract

An electrically powered pump includes a pump arrangement that pumps a liquid, and an electric motor arrangement that has a stator and a rotor that are installed on a passage through which the liquid pumped by the pump arrangement flows. At least one of the stator and the rotor has a winding wire that generates a magnetic field when it is energized to rotate the rotor with respect to the stator to drive the pump arrangement. The winding wire has a conductive body through which an electric current passes and an insulation body that insulates the conductive body. The conductive body is made of a material predominantly composed of carbon. Thereby, the liquid pumped by a pump arrangement is prevented from corroding the winding wire.

1 . An electrically powered pump comprising:
 a pump arrangement that pumps a liquid; and   an electric motor arrangement that has a stator and a rotor that are installed on a passage through which the liquid pumped by the pump arrangement flows, wherein:   at least one of the stator and the rotor has a winding wire that generates a magnetic field when it is energized to rotate the rotor with respect to the stator to drive the pump arrangement;   the winding wire has a conductive body through which an electric current passes and an insulation body that insulates the conductive body; and   the conductive body is made of a material predominantly composed of carbon.   
   
   
       2 . The electrically powered pump according to  claim 1 , wherein the conductive body is a strand that is formed by spinning carbon nanotubes. 
   
   
       3 . The electrically powered pump according to  claim 1 , wherein the conductive body is a strand that is formed by binding carbon nanotubes by a binder. 
   
   
       4 . The electrically powered pump according to  claim 1 , wherein:
 the conductive body is a plurality of strands that is twisted together; and   the plurality of strands is made of a material predominantly composed of carbon.   
   
   
       5 . The electrically powered pump according to  claim 1 , wherein:
 the pump is adapted to be installed in an internal combustion engine of an vehicle; and   the liquid pumped by the pump arrangement is a reducing agent that reduces a nitrogen oxide contained in an exhaust gas of the internal combustion engine.