Stator winding heat sink configuration

Abstract

In one possible implementation, a motor is provided including a rotor and a stator. Front cooling fins are thermally coupled to a front of the stator, and rear cooling fins are thermally coupled to a rear portion of the stator. The winding is between the front and rear cooling fins.

What is claimed is: 
     
         1 . An motor comprising:
 a) a rotor; and   b) a stator comprising:
 i) front cooling fins thermally mounted to a front of the stator via a front stator yoke; 
 ii) rear cooling fins thermally coupled to a rear portion of the stator via a rear stator yoke; and 
 iii) a winding between the front stator yoke and the front cooling fins from the rear stator yoke and the rear cooling fins. 
   
     
     
         2 . The motor of  claim 1 , wherein the front stator yoke is mounted to a front end of the winding and surrounds three sides of the front end of the winding. 
     
     
         3 . The motor of  claim 2 , wherein the front cooling fins are mounted to a front side of the front stator yoke. 
     
     
         4 . The motor of  claim 3 , wherein the front cooling fins have a solid front annular face, the front cooling fins being oriented radially and extending laterally between the front annular face and the front stator yoke. 
     
     
         5 . The motor of  claim 1 , wherein the rear stator yoke is mounted to a rear end of the winding and surrounds three sides of the rear end of the winding. 
     
     
         6 . The motor of  claim 5 , wherein the rear cooling fins are mounted to an outer surface of the rear stator yoke. 
     
     
         7 . The motor of  claim 6 , wherein the rear cooling fins have a solid outer annular face, the rear cooling fins oriented radially and extend radially between the rear stator yoke and the outer annular face. 
     
     
         8 . The motor of  claim 1 , wherein the front cooling fins have an outer radius and an inner radius, the outer radius being about a same outer radius as the winding. 
     
     
         9 . The motor of  claim 8 , wherein the rotor comprises and outer rotor, and wherein the rear cooling fins have an outer radius and an inner radius, the inner radius being about at a same radius as an outer radius of the outer rotor. 
     
     
         10 . The motor of  claim 1 , wherein the rotor comprises and outer rotor, and wherein the rear cooling fins have an outer radius and an inner radius, the inner radius being about at a same radius as an outer radius of the outer rotor. 
     
     
         11 . The motor of  claim 1 , wherein the motor is an aircraft motor comprising a spinner, and wherein the front cooling fins are housed within the spinner. 
     
     
         12 . The motor of  claim 11 , wherein the rear cooling fins have an outer radius that is larger than an outer radius of the spinner. 
     
     
         13 . The motor of  claim 1 , wherein the motor is an aircraft motor comprising a spinner, and wherein the rear cooling fins have an outer radius that is larger than an outer radius of the spinner. 
     
     
         14 . The motor of  claim 1 , wherein the motor is an aircraft motor comprising a spinner, and wherein the front cooling fins have an outer radius that is less than a radius of a rear opening of the spinner. 
     
     
         15 . A motor comprising:
 a) an inner and outer rotor connected together;   b) a stator between the inner and outer rotors, the stator comprising:
 i) a winding comprising conductors encased in a thermally conductive material; 
 ii) a thermally conductive front yoke mounted to a front end of the winding; 
 iii) front cooling fins mounted to the front yoke; 
 iv) a thermally conductive rear yoke mounted to a rear end of the winding; and 
 v) rear cooling fins mounted to the rear yoke; and 
   c) wherein the winding is disposed between and separates the front yoke and the front cooling fins from the rear yoke and the rear cooling fins.   
     
     
         16 . The motor of  claim 15 , wherein the front cooling fins are mounted to a front end of the front yoke. 
     
     
         17 . The motor of  claim 16 , wherein the rear cooling fins are mounted to an outer surface of the rear yoke. 
     
     
         18 . The motor of  claim 17 , wherein the front yoke surrounds three sides of the front end of the winding, and wherein the rear yoke surrounds three sides of the rear end of the winding. 
     
     
         19 . The motor of  claim 15 , wherein the rear cooling fins are mounted to an outer surface of the rear yoke.