Stator for Rotary Electric Machine and Rotary Electric Machine Using Same

Abstract

Provided is a rotary electric machine which is configured to draw three-phase output lines from a connection side coil end by an easy process. A stator for a rotary electric machine according to the present invention includes a plurality of segment coils including connection-side winding portions and non-connection-side winding portions. The connection-side winding portions are arranged on one side of a stator core and connected to slots with the same slot pitch, and the non-connection-side winding portions are arranged on the other side of the stator core and inserted into the slots with a plurality of kinds of slot pitches. The connection-side winding portions include a first connection group and a second connection group. The first connection group is provided with a plurality of terminal portions for connecting the segments, and the second connection group connects layers different from those in the first connection group, and is provided with a plurality of terminal portions.

1 . A method for manufacturing a stator of a rotary electric machine, comprising: a first step of forming a plurality of flat wire coils in an U-shape having terminal portions; a second step of arranging said coils in a slot formed in a stator core at a plurality of slot pitches and forming a plurality of layers along a radial direction of said stator core; and a third step of forming a plurality of layers along a radial direction of said stator core in an axial direction of said stator core on a connection side where said terminal portions are arranged,
 one of the coils used as a lead wire for connecting to an external device, and the coils other than the lead wire are twisted and formed with the same amount of movement in the circumferential direction in the specified layer of the plurality of layers in order to connect the coils with the same slot pitch.   
     
     
         2 . The method for manufacturing a stator of a rotary electric machine according to  claim 1  wherein the third process is carried out in one step. 
     
     
         3 . A manufacturing method for a stator of a rotary electric machine according to  claim 1 , wherein a fourth step of connecting the connection side terminal portion of the coil with the connection side terminal portion of another coil adjacent in the radial direction of the rotating electric machine by welding to form a three-phase coil. 
     
     
         4 . The stator of a rotary electric machine according to  claim 1  including the process of connecting the coils of the three phases to each other at the connecting side to form the neutral wire. 
     
     
         5 . The manufacturing method of a stator of a rotary electric machine according to  claim 1 , wherein the lead wire is placed at one of the outermost circumference side or the innermost circumference side in the radial direction and the neutral wire is placed on the outermost circumference side or on the other side of the innermost circumference side, and the neutral wire is placed on the outermost circumference side or on the other side of the innermost circumference side. 
     
     
         6 . The manufacturing method of a stator of a rotary electric machine according to  claim 3 , wherein
 in the fourth process a natural number connecting said connecting side terminal portions of the segments of 2n−1 layer and 2n layer, and   said connecting side terminal portions between segments of 2n layers and 2n+1 layers are connected.