Rotating Electric Apparatus and Method for Connecting Stator Coils Thereof

Abstract

Each pair of coils mutually connected in a stator winding is arranged in a fashion that a first coil of each pair of coils has an inner-circumferential-side coil terminal ( 212 ) led out from an inner-circumferential-side slot position in the direction of a coil end ( 220 ) of the stator winding, and that a second coil of each pair of coils has an outer-circumferential-side coil terminal ( 211 ) led out from an outer-circumferential-side slot position in the direction of the coil end ( 220 ) of the stator winding for connection to the inner-circumferential-side coil terminal ( 212 ), wherein there is provided a coil terminal connection structure in which the inner-circumferential-side coil terminal ( 212 ) is connected to the outer-circumferential-side coil terminal ( 211 ) across the coil end ( 220 ), and joint parts ( 211 a, 212 a ) thereof are bent close to the coil end ( 220 ).

1 .- 15 . (canceled) 
     
     
         16 . A stator comprising:
 a stator iron core; and   a stator winding including a plurality of coils connected in a plurality of slots formed in the stator iron core;   wherein each pair of coils mutually connected in the stator winding is arranged in a fashion that
 a first coil of the each pair of coils has a top-side coil terminal at a top-side position of a slot, the top-side coil terminal being led out in a direction of a coil end of the stator winding; and 
 a second coil of the each pair of coils has a bottom-side coil terminal at a bottom-side position of the slot, the bottom-side coil terminal being led out in the direction of the coil end of the stator winding for connection to the top-side coil terminal; 
   wherein a coil terminal connection structure is provided in which either one of the top-side coil terminal and the bottom-side coil terminal is extended through a coil-to-coil clearance on the coil end to a position of the other one of the top-side and bottom-side coil terminals, and the one of the top-side and bottom-side coil terminals thus extended is connected to the other one of the top-side and bottom-side coil terminals;   in a case where the top-side coil terminal is led out to a position of the bottom-side coil terminal, joint parts of the top-side coil terminal and the bottom-side coil terminal are bent radially inwardly with respect to the stator iron core; and   in a case where the bottom-side coil terminal is led out to a position of the top-side coil terminal, joint parts of the top-side coil terminal and the bottom-side coil terminal are bent radially outwardly with respect to the stator iron core.   
     
     
         17 . A stator comprising:
 a stator iron core that has a plurality of slots formed therein; and   a stator winding that includes a plurality of coils held in the plurality of slots;   wherein each pair of coils mutually connected in the stator winding is arranged in a fashion that
 a first coil of the each pair of coils has a top-side coil terminal at a top-side position of a slot, the top-side coil terminal being led out in the direction of a coil end of the stator winding; and 
 a second coil of the each pair of coils has a bottom-side coil terminal at a bottom-side position of the slot, the bottom-side coil terminal being led out in the direction of the coil end of the stator winding for connection to the top-side coil terminal; 
   wherein either one of the top-side coil terminal and the bottom-side coil terminal is laid spiral-wise along the coil end to a position of the other one of the top-side and bottom-side coil terminals so that the one of the top-side and bottom-side coil terminals is connected to the other one of the top-side and bottom-side coil terminals;   in a case where the top-side coil terminal is laid spiral-wise to a position of the bottom-side coil terminal, joint parts of the top-side coil terminal and the bottom-side coil terminal are bent radially inwardly with respect to the stator iron core; and   in a case where the bottom-side coil terminal is laid spiral-wise to a position of the top-side coil terminal, joint parts of the top-side coil terminal and the bottom-side coil terminal are bent radially outwardly with respect to the stator iron core.   
     
     
         18 . A rotating electric apparatus as claimed in  claim 17 ,
 wherein joint parts of the top-side coil terminal and the bottom-side coil terminal are bent in a fashion that the joint parts are folded back to one of the top-side and bottom-side coil terminals that is laid spiral-wise along the coil end.   
     
     
         19 . A stator comprising:
 a stator iron core; and   a stator winding comprising a plurality of coils connected in a plurality of slots formed in the stator iron core;   wherein each pair of coils mutually connected in the stator winding is arranged in a fashion that
 a first coil of the each pair of coils has a top-side coil terminal at a top-side position of a slot, the top-side coil terminal being led out in the direction of a coil end of the stator winding; and 
 a second coil of the each pair of coils has a bottom-side coil terminal at a bottom-side position of the slot, the bottom-side coil terminal being led out in the direction of the coil end of the stator winding for connection to the top-side coil terminal; 
   wherein one of the top-side coil terminal and the bottom-side coil terminal is laid spiral-wise along the coil end of the stator winding, and an opening selected from a notch and a through hole is formed on a joint part of the one of the top-side and bottom-side coil terminals, and   wherein the other one of the top-side and bottom-side coil terminals is bent radially across the coil end, and a joint part of the other one of the top-side and bottom-side coil terminals is connected to the opening formed on the joint part of the one of the top-side and bottom-side coil terminals.   
     
     
         20 . A stator comprising:
 a stator iron core; and   a stator winding comprising a plurality of coils connected in a plurality of slots formed in the stator iron core;   wherein each pair of coils mutually connected in the stator winding is arranged in a fashion that
 a first coil of the each pair of coils has a top-side coil terminal at a top-side position of the slot, the top-side coil terminal being led out in the direction of a coil end of the stator winding; and 
 a second coil of the each pair of coils has a bottom-side coil terminal at a bottom-side position of the slot, the bottom-side coil terminal being led out in the direction of the coil end of the stator winding for connection to the top-side coil terminal; 
   wherein the stator winding is formed of a flat-type conductor wire material having a rectangular cross section, with a wide side face of the flat-type conductor wire material corresponding to the long side of the rectangular cross section, and with a narrow side face of the flat-type conductor wire material corresponding to the long side of the rectangular cross section,   wherein one of the top-side coil terminal and the bottom-side coil terminal is laid spiral-wise along the coil end of the stator winding,   wherein a joint part of the one of the top-side and bottom-side coil terminals is bent radially with respect to the stator, and   wherein the other one of the top-side and bottom-side coil terminals is bent radially across the coil end.   
     
     
         21 . The rotating electric apparatus as claimed in  claim 20 , wherein both of the top-side coil terminal and the bottom-side coil terminal are laid spiral-wise along the coil end of the stator winding. 
     
     
         22 . The rotating electric apparatus as claimed in  claim 20 , wherein a wide side face of the one of the top-side and bottom-side coil terminals is connected to a wide side face of the other one of the top-side and bottom-side coil terminals. 
     
     
         23 . The rotating electric apparatus as claimed in  claim 20 , wherein a joint part of the other one of the top-side and bottom-side coil terminals is bent radially with respect to the stator. 
     
     
         24 . The rotating electric apparatus as claimed in  claim 23 , wherein the joint parts of the one of the top-side and bottom-side coil terminals and the other one of the top-side and bottom-side coil terminals are bent radially outward. 
     
     
         25 . The rotating electric apparatus as claimed in  claim 23 , wherein the joint parts of the one of the top-side and bottom-side coil terminals and the other one of the top-side and bottom-side coil terminals are arranged outside of the coil end. 
     
     
         26 . The rotating electric apparatus as claimed in  claim 23 , wherein edge portions of the joint parts are pointing toward radially outside. 
     
     
         27 . A stator winding comprising:
 a plurality of coils connected in a plurality of slots formed in a stator iron core;   wherein each pair of coils mutually connected in the stator winding is arranged in a fashion that
 a first coil of the each pair of coils has a top-side coil terminal at a top-side position of a slot, the top-side coil terminal being led out in a direction of a coil end of the stator winding and 
 a second coil of the each pair of coils has a bottom-side coil terminal at a bottom-side position of the slot, the bottom-side coil terminal being led out in the direction of the coil end of the stator winding for connection to the top-side coil terminal; 
   wherein a coil terminal connection structure is provided in which either one of the top-side coil terminal and the bottom-side coil terminal is extended through a coil-to-coil clearance on the coil end to a position of the other one of the top-side and bottom-side coil terminals, and the one of the top-side and bottom-side coil terminals thus extended is connected to the other one of the top-side and bottom-side coil terminals;   in a case where the top-side coil terminal is led out to a position of the bottom-side coil terminal, joint parts of the top-side coil terminal and the bottom-side coil terminal are bent radially inwardly with respect to the stator iron core; and   in a case where the bottom-side coil terminal is led out to a position of the top-side coil terminal, joint parts of the top-side coil terminal and the bottom-side coil terminal are bent radially outwardly with respect to the stator iron core.   
     
     
         28 . A stator winding comprising:
 a plurality of coils held in a plurality of slots formed in a stator iron core;   wherein each pair of coils mutually connected in the stator winding is arranged in a fashion that
 a first coil of the each pair of coils has a top-side coil terminal at a top-side position of a slot, the top-side coil terminal being led out in the direction of a coil end of the stator winding; and 
 a second coil of the each pair of coils has a bottom-side coil terminal at a bottom-side position of the slot, the bottom-side coil terminal being led out in the direction of the coil end of the stator winding for connection to the top-side coil terminal; 
   wherein either one of the top-side coil terminal and the bottom-side coil terminal is laid spiral-wise along the coil end to a position of the other one of the top-side and bottom-side coil terminals so that the one of the top-side and bottom-side coil terminals is connected to the other one of the top-side and bottom-side coil terminals;   in a case where the top-side coil terminal is laid spiral-wise to a position of the bottom-side coil terminal, joint parts of the top-side coil terminal and the bottom-side coil terminal are bent radially inwardly with respect to the stator iron core; and   in a case where the bottom-side coil terminal is laid spiral-wise to a position of the top-side coil terminal, joint parts of the top-side coil terminal and the bottom-side coil terminal are bent radially outwardly with respect to the stator iron core.   
     
     
         29 . A rotating electric apparatus as claimed in  claim 28 ,
 wherein joint parts of the top-side coil terminal and the bottom-side coil terminal are bent in a fashion that the joint parts are folded back to one of the top-side and bottom-side coil terminals that is laid spiral-wise along the coil end.   
     
     
         30 . A stator winding comprising:
 a plurality of coils connected in a plurality of slots formed in a stator iron core;   wherein each pair of coils mutually connected in the stator winding is arranged in a fashion that
 a first coil of the each pair of coils has a top-side coil terminal at a top-side position of a slot, the top-side coil terminal being led out in the direction of a coil end of the stator winding; and 
 a second coil of the each pair of coils has a bottom-side coil terminal at a bottom-side position of the slot, the bottom-side coil terminal being led out in the direction of the coil end of the stator winding for connection to the top-side coil terminal; 
   wherein one of the top-side coil terminal and the bottom-side coil terminal is laid spiral-wise along the coil end of the stator winding, and an opening selected from a notch and a through hole is formed on a joint part of the one of the top-side and bottom-side coil terminals, and   wherein the other one of the top-side and bottom-side coil terminals is bent radially across the coil end, and a joint part of the other one of the top-side and bottom-side coil terminals is connected to the opening formed on the joint part of the one of the top-side and bottom-side coil terminals.   
     
     
         31 . A stator winding comprising:
 a plurality of coils connected in a plurality of slots formed in a stator iron core;   wherein each pair of coils mutually connected in the stator winding is arranged in a fashion that
 a first coil of the each pair of coils has a top-side coil terminal at a top-side position of the slot, the top-side coil terminal being led out in the direction of a coil end of the stator winding; and 
 a second coil of the each pair of coils has a bottom-side coil terminal at a bottom-side position of the slot, the bottom-side coil terminal being led out in the direction of the coil end of the stator winding for connection to the top-side coil terminal; 
   wherein the stator winding is formed of a flat-type conductor wire material having a rectangular cross section, with a wide side face of the flat-type conductor wire material corresponding to the long side of the rectangular cross section, and with a narrow side face of the flat-type conductor wire material corresponding to the long side of the rectangular cross section,   wherein one of the top-side coil terminal and the bottom-side coil terminal is laid spiral-wise along the coil end of the stator winding,   wherein a joint part of the one of the top-side and bottom-side coil terminals is bent radially with respect to the stator, and   wherein the other one of the top-side and bottom-side coil terminals is bent radially across the coil end.   
     
     
         32 . The rotating electric apparatus as claimed in  claim 31 , wherein both of the top-side coil terminal and the bottom-side coil terminal are laid spiral-wise along the coil end of the stator winding. 
     
     
         33 . The rotating electric apparatus as claimed in  claim 31 , wherein a wide side face of the one of the top-side and bottom-side coil terminals is connected to a wide side face of the other one of the top-side and bottom-side coil terminals. 
     
     
         34 . The rotating electric apparatus as claimed in  claim 31 , wherein a joint part of the other one of the top-side and bottom-side coil terminals is bent radially with respect to the stator. 
     
     
         35 . The rotating electric apparatus as claimed in  claim 34 , wherein the joint parts of the one of the top-side and bottom-side coil terminals and the other one of the top-side and bottom-side coil terminals are bent radially outward. 
     
     
         36 . The rotating electric apparatus as claimed in  claim 34 , wherein the joint parts of the one of the top-side and bottom-side coil terminals and the other one of the top-side and bottom-side coil terminals are arranged outside of the coil end. 
     
     
         37 . The rotating electric apparatus as claimed in  claim 34 , wherein edge portions of the joint parts are pointing toward radially outside.