Armature for rotating electric machine

Abstract

In an armature, a coil includes a plurality of conductor segments, each provided with a conducting side section and a pair of protruding sections. The two protruding sections in each pair extend in opposite directions from each other with respect to a circumferential direction. Each protruding section is joined to a protruding section of another conductor segment to which that conductor segment is joined. At least one of each two protruding sections joined to each other is provided with an offset bend section that offsets a tip towards the other protruding section in a radial direction. The join surfaces formed on the tips of the two protruding sections are joined facing each other in the circumferential direction.

1 . An armature for a rotating electrical machine, comprising:
 an armature core in which a plurality of slots extending in an axial direction of a cylindrical core reference plane are arranged so as to be distributed in a circumferential direction of the core reference plane; and   a coil that is wound about the armature core, wherein   the coil is formed by using a plurality of segment conductors each including a conductor side portion placed in the slot, and a pair of protruding portions extending from the conductor side portion to protrude beyond the armature core to both sides in the axial direction, and tilted in the circumferential direction with respect to an extending direction of the conductor side portion so as to be located gradually away from the armature core in the axial direction,   extending directions of the pair of protruding portions in the circumferential direction are opposite from each other,   each of the protruding portions is joined to the protruding portion of another one of the segment conductors, which is a joint segment conductor to be joined to the each protruding portion,   at least one of the two protruding portions to be joined together has a offset bent portion that offsets a tip end toward the other of the protruding portions in a radial direction of the core reference plane, and   joint faces formed in the tip ends of the two protruding portions are joined together so as to face each other in the circumferential direction.   
     
     
         2 . The armature for the rotating electrical machine according to  claim 1 , wherein
 an adjacent same-layer segment conductor for each of the segment conductors is another one of the segment conductors whose conductor side portion is placed in a same position in the radial direction in an adjacent one of the slots, and   the offset bent portion is provided in a gap in the circumferential direction between the tip end of the protruding portion to be joined that is included in the joint segment conductor, and the tip end of the protruding portion included in the adjacent same-layer segment conductor for the joint segment conductor.   
     
     
         3 . The armature for the rotating electrical machine according to  claim 1 , wherein
 an adjacent same-layer segment conductor for each of the segment conductors is another one of the segment conductors whose conductor side portion is placed in the same position in the radial direction in the adjacent one of the slots, and   the protruding portions of each of the segment conductors are respectively placed adjacent to the protruding portions of the adjacent same-layer segment conductor so as to be arranged parallel to the protruding portions of the adjacent same-layer segment conductor, and arranged next to each other at a same position in the radial direction as the protruding portions of the adjacent same-layer segment conductor.   
     
     
         4 . The armature for the rotating electrical machine according to  claim 1 , wherein
 the joint segment conductor for each of the segment conductors is another one of the segment conductors whose conductor side portion is placed at a position in the radial direction adjacent to the conductor side portion of the segment conductor in one of the slots different from the slot in which the each segment conductor is placed.   
     
     
         5 . The armature for the rotating electrical machine according to  claim 1 , further comprising:
 a plurality of radial arrangement portions in which a plurality of joints, each of which is formed between the joint faces of the two protruding portions, are arranged next to each other in the radial direction, and   the plurality of joints forming each of the radial arrangement portions are arranged at uniform intervals in the radial direction.   
     
     
         6 . The armature for the rotating electrical machine according to  claim 1 , wherein
 the slots have an opening on one side in the radial direction of the core reference plane, and   a width of the opening in the circumferential direction is set to such a width that allows the conductor side portion to be inserted in the radial direction.   
     
     
         7 . The armature for the rotating electrical machine according to  claim 1 , wherein
 the tip end of each of the protruding portions is formed at a same position in the radial direction as the tip end of a joint protruding portion, which is the protruding portion to be joined to the each protruding portion, so as to extend parallel to an extending direction of the tip end of the joint protruding portion.   
     
     
         8 . The armature for the rotating electrical machine according to  claim 1 , wherein
 each of the protruding portions includes a main body portion that extends in the circumferential direction, and is formed in a linear shape extending in a direction tilted with respect to the extending direction of the conductor side portion as the core reference plane is viewed in the radial direction and in an arc shape parallel to the core reference plane as the core reference plane is viewed in the axial direction.   
     
     
         9 . The armature for the rotating electrical machine according to  claim 2 , wherein
 an adjacent same-layer segment conductor for each of the segment conductors is another one of the segment conductors whose conductor side portion is placed in the same position in the radial direction in the adjacent one of the slots, and   the protruding portions of each of the segment conductors are respectively placed adjacent to the protruding portions of the adjacent same-layer segment conductor so as to be arranged parallel to the protruding portions of the adjacent same-layer segment conductor, and arranged next to each other at a same position in the radial direction as the protruding portions of the adjacent same-layer segment conductor.   
     
     
         10 . The armature for the rotating electrical machine according to  claim 9 , wherein
 the joint segment conductor for each of the segment conductors is another one of the segment conductors whose conductor side portion is placed at a position in the radial direction adjacent to the conductor side portion of the segment conductor in one of the slots different from the slot in which the each segment conductor is placed.   
     
     
         11 . The armature for the rotating electrical machine according to  claim 10 , further comprising:
 a plurality of radial arrangement portions in which a plurality of joints, each of which is formed between the joint faces of the two protruding portions, are arranged next to each other in the radial direction, and   the plurality of joints forming each of the radial arrangement portions are arranged at uniform intervals in the radial direction.   
     
     
         12 . The armature for the rotating electrical machine according to  claim 11 , wherein
 the slots have an opening on one side in the radial direction of the core reference plane, and   a width of the opening in the circumferential direction is set to such a width that allows the conductor side portion to be inserted in the radial direction.   
     
     
         13 . The armature for the rotating electrical machine according to  claim 12 , wherein
 the tip end of each of the protruding portions is formed at a same position in the radial direction as the tip end of a joint protruding portion, which is the protruding portion to be joined to the each protruding portion, so as to extend parallel to an extending direction of the tip end of the joint protruding portion.   
     
     
         14 . The armature for the rotating electrical machine according to  claim 13 , wherein
 each of the protruding portions includes a main body portion that extends in the circumferential direction, and is formed in a linear shape extending in a direction tilted with respect to the extending direction of the conductor side portion as the core reference plane is viewed in the radial direction and in an arc shape parallel to the core reference plane as the core reference plane is viewed in the axial direction.   
     
     
         15 . The armature for the rotating electrical machine according to  claim 2 , wherein
 the joint segment conductor for each of the segment conductors is another one of the segment conductors whose conductor side portion is placed at a position in the radial direction adjacent to the conductor side portion of the segment conductor in one of the slots different from the slot in which the each segment conductor is placed.   
     
     
         16 . The armature for the rotating electrical machine according to  claim 2 , further comprising:
 a plurality of radial arrangement portions in which a plurality of joints, each of which is formed between the joint faces of the two protruding portions, are arranged next to each other in the radial direction, and   the plurality of joints forming each of the radial arrangement portions are arranged at uniform intervals in the radial direction.   
     
     
         17 . The armature for the rotating electrical machine according to  claim 2 , wherein
 the slots have an opening on one side in the radial direction of the core reference plane, and   a width of the opening in the circumferential direction is set to such a width that allows the conductor side portion to be inserted in the radial direction.   
     
     
         18 . The armature for the rotating electrical machine according to  claim 3 , wherein
 the joint segment conductor for each of the segment conductors is another one of the segment conductors whose conductor side portion is placed at a position in the radial direction adjacent to the conductor side portion of the segment conductor in one of the slots different from the slot in which the each segment conductor is placed.   
     
     
         19 . The armature for the rotating electrical machine according to  claim 3 , further comprising:
 a plurality of radial arrangement portions in which a plurality of joints, each of which is formed between the joint faces of the two protruding portions, are arranged next to each other in the radial direction, and   the plurality of joints forming each of the radial arrangement portions are arranged at uniform intervals in the radial direction.   
     
     
         20 . The armature for the rotating electrical machine according to  claim 3 , wherein
 the slots have an opening on one side in the radial direction of the core reference plane, and   a width of the opening in the circumferential direction is set to such a width that allows the conductor side portion to be inserted in the radial direction.