Rotor of motor

Abstract

A rotor of a motor is provided. The rotor includes a rotor core and a winding coil wound on the rotor core. The rotor is rotatable by an electromagnetic interaction with a stator, in which both sides of an end wall of each slot of the rotor core where the winding coil is inserted are respectively provided with a corner portion to connect both lateral walls of each slot. As a result the effective area of a flux is increased thereby to decrease flux resistance and to reduce a stacked height of the rotor, that is, the number of stacked thin plates.

1 . A rotor of a motor comprising: 
 the rotor core including a plurality of slots, each of the plurality of slots having two lateral walls, an end wall, and two round corners respectively connecting two lateral walls and both sides of the end wall; and    a winding coil wound on the rotor core, the winding coil contacting and covering the two round corners;    the rotor being rotatable by an electromagnetic interaction with a stator.    
   
   
       2 . (canceled)  
   
   
       3 . The rotor of a motor of  claim 1 , wherein the end wall is formed as a curved surface having a radius, an origin of the radius being the same as an origin of a radius of an outer circumferential surface of the rotor core.  
   
   
       4 . The rotor of a motor of  claim 3 , wherein the end wall is formed along a circumference of an imaginary circle concentric with a center of the rotor core, and the end wall has a certain length.  
   
   
       5 . The rotor of a motor of  claim 1 , wherein the end wall is planar.  
   
   
       6 . The rotor of a motor of  claim 1 , wherein a tooth formed by two adjacent slots and on which the winding coil is wound is connected to an inner side surface of adjacent teeth by a curved surface having the same curvature as an outer circumferential surface of the rotor core.  
   
   
       7 . A rotor of a motor comprising: 
 a rotor core rotatably inserted into a stator; and    a winding coil wound on the rotor core, in which the rotor core includes:    a cylindrical body portion;    a shaft hole penetratingly formed at a center of the cylindrical body portion;    a plurality of slots penetratingly formed at an edge of the cylindrical body portion in a longitudinal direction of the cylindrical body portion and receiving the winding coil therein; and    a plurality of teeth formed between the slots and on which the winding coil is wound,    wherein each of the plurality of slots includes:    an opening portion formed at an outer circumferential surface of the cylindrical body portion;    an extension portion connected to the opening portion and penetratingly formed as an angle shape in the longitudinal direction of the cylindrical body portion; and    two round corners respectively formed at both ends of an end wall of the extension portion located at an opposite side to the opening portion, the winding coil contacting and covering the two round corners.    
   
   
       8 . (canceled)  
   
   
       9 . The rotor of a motor of  claim 7 , wherein the end wall is formed as a curved surface having a radius, an origin of the radius being the same as an origin of a radius of an outer circumferential surface of the rotor core.  
   
   
       10 . The rotor of a motor of  claim 7 , wherein the end wall is formed as a plane having a certain surface area.  
   
   
       11 . The rotor of a motor of  claim 7 , wherein a tooth of the rotor core on which the winding coil is wound is connected to an inner side surface of adjacent teeth by a curved surface having the same curvature as an outer circumferentially surface of the rotor core.  
   
   
       12 . The rotor of a motor of  claim 7 , wherein the rotor core is a stack body formed with a plurality of stacked thin plates.