Method of manufacturing stator of rotating electric machine

Abstract

A stator of a rotating electric machine includes a stator core, multiple pairs of coils and multiple leads. The stator core includes a laminated core assembly formed by laminating thin steel plates in a cylindrical form, the stator core having multiple slots at intervals along a circumferential direction. Each coil pair is made of two elongate conductors which are folded back outside axial end surfaces of the stator core and fitted into the slots such that the two conductors are disposed alternately in inner and outer layers in a slot depth direction at intervals of a fixed number of slots. The multiple leads for connecting the coil pairs to an external electric circuit are arranged in at least one group and the leads of the same group extend from positions of those slots which are located adjacent to one another along the circumferential direction.

1 - 4 . (canceled)  
   
   
       5 . A method of manufacturing a stator of a rotating electric machine, said stator comprising: 
 a stator core including a laminated core assembly of laminated thin steel plates having a cylindrical form, the stator core having multiple slots therein at intervals along a circumferential direction of the stator core;    multiple pairs of coils, each coil pair including two elongate conductors which are folded backs outside axial end surfaces of the stator core, and fitted into the slots in such a way that the two conductors of each coil pair are disposed alternately in inner and outer layers in a slot depth direction at intervals of a fixed number of slots; and    multiple leads extending from the stator core for connecting the multiple coil pairs to an external electric circuit, said manufacturing method comprising:    stretching the laminated core assembly in a straight beltlike form;    installing the coils in the laminated core assembly in such a way that the multiple leads are arranged in at least one group and the leads of the same group extend from positions of those slots which are located adjacent to one another along the circumferential direction of the stator core; and    joining ends of the beltlike laminated core assembly to each other to complete the stator core having the cylindrical form.    
   
   
       6 . The method of manufacturing the stator according to  claim 5 , wherein ends of each conductor of the coils are fitted in slots which are located adjacent to one another from the ends of the beltlike laminated core assembly.