Permanent-magnet Synchronous Motor of Drainage Pump

Abstract

A permanent-magnet synchronous motor of a draining pump is disclosed. It includes a permanent-magnet rotor for driving an impeller to rotate, a pump body for supporting the permanent-magnet rotor, a stator core and a stator coil. Among which, the stator coil is constructed with an enamelled aluminum wire winding which is coiled by an enamelled aluminum wire and sealed in a container. The invention applies the enamelled aluminum wire to the permanent-magnet synchronous motor of a draining pump. The winding of the stator coil and a welding part of its lead-out wire are sealed with plastic or epoxy resin which effectively isolate them from outside air, especially damp air. Therefore, the invention prevent the enamelled aluminum wire winding of the stator coil and the welding part of its lead-out wire from being oxidized in air and being corroded by the moisture, acid or alkaline matter in damp air.

1 . A permanent-magnet synchronous motor of a draining pump, comprising:
 a permanent-magnet rotor for driving an impeller to rotate, a pump body for supporting the permanent-magnet rotor, a stator core and a stator coil, wherein   the stator coil is equipped with an enameled aluminum wire winding which is constructed by coiling an enameled aluminum wire.   
     
     
         2 . The permanent-magnet synchronous motor of a draining pump according to  claim 1 , wherein the enameled aluminum wire winding is sealed in a container. 
     
     
         3 . The permanent-magnet synchronous motor of a draining pump according to  claim 2 , wherein a welding part of a lead-out wire for the enameled aluminum wire winding is coated or covered with insulating materials which isolates it from the outside. 
     
     
         4 . The permanent-magnet synchronous motor of a draining pump according to  claim 2 , wherein the container for sealing the enameled aluminum wire winding is formed by plastic or epoxy resin. 
     
     
         5 . The permanent-magnet synchronous motor of a draining pump according to  claim 4 , wherein the container formed by plastic takes shape of a coil bobbin which is coiled by the enameled aluminum wire. 
     
     
         6 . The permanent-magnet synchronous motor of a draining pump according to  claim 4 , wherein the container formed by epoxy resin is constructed by pouring epoxy resin onto the enameled aluminum wire winding which is arranged in a cavity body and solidifying it. 
     
     
         7 . The permanent-magnet synchronous motor of a draining pump according to  claim 6 , wherein the enameled aluminum wire winding and the welding part are covered and sealed by epoxy resin. 
     
     
         8 . The permanent-magnet synchronous motor of draining pump according to  claim 4 , wherein the outside surface of the enameled aluminum wire winding is covered with an insulating paper tape, and then sealed with the container which is formed by plastic or epoxy resin. 
     
     
         9 . The permanent-magnet synchronous motor of a draining pump according to  claim 7 , wherein the outside surface of the welding part is treated by tinning or tin immersion. 
     
     
         10 . The permanent-magnet synchronous motor of a draining pump according to  claim 2 , -wherein the diameter of the enameled aluminum wire is smaller or equal to 0.03937 inches (1.0 mm). 
     
     
         11 . The permanent-magnet synchronous motor of draining pump according to  claim 2 , wherein the thickness of the stator core is between 0.3937 inches (10 mm) and 1.9685 inches (50 mm). 
     
     
         12 . A permanent-magnet synchronous motor of a draining pump, comprising:
 a permanent-magnet rotor for driving an impeller to rotate;   a pump body for supporting the permanent-magnet rotor;   a stator core and a stator coil;   
       wherein
 the stator coil is equipped with an enameled aluminum wire winding which is constructed by coiling an enameled aluminum wire and the enameled aluminum wire winding is sealed in a container, and 
 an outside surface of a welding part of a lead-out wire for the enameled aluminum wire winding is covered or coated with insulating materials which isolates it from the outside. 
 
     
     
         13 . The permanent-magnet synchronous motor of a draining pump according to  claim 12 , wherein the container for sealing the enameled aluminum wire winding is formed by plastic or epoxy resin. 
     
     
         14 . The permanent-magnet synchronous motor of a draining pump according to  claim 13 , wherein the container formed by plastic takes shape of a coil bobbin which is coiled by the enameled aluminum wire. 
     
     
         15 . The permanent-magnet synchronous motor of a draining pump according to  claim 13 , wherein the container formed by epoxy resin is constructed by pouring epoxy resin onto the enameled aluminum wire winding which is arranged in a cavity body and solidifying it. 
     
     
         16 . The permanent-magnet synchronous motor of a draining pump according to  claim 15 , wherein the enameled aluminum wire winding and a welding part of its lead-out wire are covered and sealed by epoxy resin. 
     
     
         17 . The permanent-magnet synchronous motor of a draining pump according to  claim 16 , wherein the outside surface of the enameled aluminum wire winding is covered with an insulating paper tape, and then sealed with the container which is formed by plastic or epoxy resin. 
     
     
         18 . The permanent-magnet synchronous motor of draining pump according to  claim 12 , wherein the outside surface of the welding part is treated by tinning or tin immersion. 
     
     
         19 . The permanent-magnet synchronous motor of a draining pump according to  claim 12 , wherein the diameter of the enameled aluminum wire is smaller or equal to 0.03937 inches (1.0 mm). 
     
     
         20 . The permanent-magnet synchronous motor of a draining pump according to  claim 12 , wherein the thickness of the stator core is between 0.3937 inches (10 mm) and 1.9685 inches (50 mm).