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 ).

What is claimed is: 
     
       1. A rotating electric apparatus comprising:
 a stator having a stator winding comprising a plurality of coils connected in a plurality of slots formed in a stator iron core; and   a rotor rotatably disposed in the inside of said stator; wherein, each pair of coils mutually connected in said stator winding is arranged in a fashion that   a first coil of each said pair of coils has a top-side coil terminal at a top-side position of said slot, said top-side coil terminal being led out in the direction of a coil end of said stator winding; and   a second coil of each said pair of coils has a bottom-side coil terminal at a bottom-side position of said slot said bottom-side coil terminal being led out in the direction of said coil end of said stator winding for connection to said top-side coil terminal;   there is provided a coil terminal connection structure in which said top-side coil terminal and said bottom-side coil terminal are connected mutually across said coil end, and joint parts of said top-side coil terminal and said bottom-side coil terminal thus connected are bent so that said joint parts are disposed close to said coil end;   each one of said top-side coil terminal and said bottom-side coil terminal is laid spiral-wise across said coil end to a position of the other one of said top-side and bottom-side coil terminals;   side faces of joint parts of said top-side and bottom-side coil terminals are connected mutually in a fashion such that end faces of said joint parts of said top-side and bottom-side coil terminals are oriented in mutually opposite directions; and   said joint parts thus connected are disposed close to said coil end.   
     
     
       2. A rotating electric apparatus comprising:
 a stator having a stator winding comprising a plurality of coils connected in a plurality of slots formed in a stator iron core; and 
 a rotor rotatably disposed in the inside of said stator; wherein, 
 each pair of coils mutually connected in said stator winding is arranged in a fashion that
 a first coil of each said pair of coils has a top-side coil terminal at a top-side position of said slot, said top-side coil terminal being led out in the direction of a coil end of said stator winding; and 
 a second coil of each said pair of coils has a bottom-side coil terminal at a bottom-side position of said slot, said bottom-side coil terminal being led out in the direction of said coil end of said stator winding for connection to said top-side coil terminal; 
 
 there is provided a coil terminal connection structure in which either one of said top-side coil terminal and said bottom-side coil terminal is extended through a coil-to-coil clearance on said coil end to a position of the other one of said top-side and bottom-side coil terminals, and said one of said top-side and bottom-side coil terminals thus extended is connected to the other one of said top-side and bottom-side coil terminals; 
 in a case where said top-side coil terminal is led out to a position of a said bottom-side coil terminal, joint parts of said top-side coil terminal and said bottom-side coil terminal are bent radially inwardly with respect to said stator iron core; and 
 in a case where said bottom-side coil terminal is led out to a position of said top-side coil terminal, joint parts of said top-side coil terminal and said bottom-side coil terminal are bent radially outwardly with respect to stator iron core. 
 
     
     
       3. A rotating electric apparatus comprising:
 a stator including a stator iron core that has a plurality of slots formed thereon, and a stator winding that comprises a plurality of coils held in said plurality of slots; and 
 a rotor having a face opposed to a face of said stator iron core mutually, said rotor being held rotatably via an air gap so that there is produced a magnetic circuit through which a magnetic flux is passed between the mutually opposed faces of said stator iron core and said rotor via said air gap; wherein, 
 each pair of coils mutually connected in said stator winding is arranged in a fashion that 
 one of each said pair of coils has a top-side coil terminal at a top-side position of said slot, said top-side coil terminal being led out in the direction of a coil end of said stator winding; and 
 the other one of each said pair of coils has a bottom-side coil terminal at a bottom-side position of said slot, said bottom-side coil terminal being led out in the direction of said coil end of said stator winding for connection to said top-side coil terminal; 
 either one of said top-side coil terminal and said bottom-side coil terminal is laid spiral-wise along said coil end to a position of the other one of said top-side and bottom-side coil terminals so that said one of said top-side and bottom-side coil terminals is connected to the other one of said top-side and bottom-side coil terminals; 
 in a case where said top-side coil terminal is laid spiral-wise to a position of said bottom-side coil terminal, joint parts of said top-side coil terminal and said bottom-side coil terminal are bent radially inwardly with respect to said stator iron core; and 
 in a case where said bottom-side coil terminal is laid spiral-wise to a position of said top-side coil terminal, joint parts of said top-side coil terminal and said bottom-side coil terminal are bent radially outwardly with respect to said stator iron core. 
 
     
     
       4. A rotating electric apparatus as claimed in  claim 3 ,
 wherein joint parts of said top-side coil terminal and said bottom-side coil terminal are bent in a fashion that said joint parts are folded back to one of said top-side and bottom-side coil terminals that is laid spiral-wise along said coil end. 
 
     
     
       5. A rotating electric apparatus comprising:
 a stator having a stator winding comprising a plurality of coils connected in a plurality of slots formed in a stator iron core; and 
 a rotor rotatably disposed in the inside of said stator; 
 wherein each pair of coils mutually connected in said stator winding is arranged in a fashion that, 
 a first coil of each said pair of coils has a top-side coil terminal at a top-side position of said slot, said top-side coil terminal being led out in the direction of a coil end of said stator winding; and 
 a second coil of each said pair of coils has a bottom-side coil terminal at a bottom-side position of said slot, said bottom-side coil terminal being led out in the direction of said coil end of said stator winding for connection to said top-side coil terminal; 
 wherein one of said top-side coil terminal and said bottom-side coil terminal is laid spiral-wise along said coil end of said stator winding, and an opening selected from a notch and a through hole is formed on a joint part of said one of said top-side and bottom-side coil terminals, and 
 wherein the other one of said top-side and bottom-side coil terminals is bent radially across said coil end, and a joint part of the other one of said top-side and bottom-side coil terminals is engagedly connected to said opening formed on said joint part of said one of said top-side and bottom-side coil terminals. 
 
     
     
       6. A rotating electric apparatus comprising:
 a stator having a stator winding comprising a plurality of coils connected in a plurality of slots formed in a stator iron core; and 
 a rotor rotatably disposed in the inside of said stator; 
 wherein each pair of coils mutually connected in said stator winding is arranged in a fashion that,
 a first coil of each said pair of coils has a top-side coil terminal at a top-side position of said slot, said top-side coil terminal being led out in the direction of a coil end of said stator winding; and 
 a second coil has a bottom-side coil terminal at a bottom-side position of said slot, said bottom-side coil terminal being led out in the direction of said coil end of said stator winding for connection to said top-side coil terminal; 
 
 wherein said stator winding is formed of a flat-type conductor wire material having a rectangular cross section, with a wide side face of said flat-type conductor wire material corresponding to the long side of said rectangular cross section, and with a narrow side face of said flat-type conductor wire material corresponding to the long side of said rectangular cross section, 
 wherein one of said top-side coil terminal and said bottom-side coil terminal is laid spiral-wise along said coil end of said stator winding, 
 wherein a joint part of said one of said top-side and bottom-side coil terminals is bent radially with respect to said stator, and 
 wherein the other one of said top-side and bottom-side coil terminals is bent radially across said coil end so that the wide side face of the other one of said top-side and bottom-side coil terminals is connected to the narrow side face of said one of said top-side and bottom-side terminals. 
 
     
     
       7. The rotating electric apparatus as claimed in claim 6, wherein both of said top-side coil terminal and said bottom-side coil terminal are laid spiral-wise along said coil end of said stator winding. 
     
     
       8. The rotating electric apparatus as claimed in claim 6, wherein a wide side face of said one of said top-side and bottom-side coil terminals is connected to a wide side face of said other one of said top-side and bottom-side coil terminals. 
     
     
       9. The rotating electric apparatus as claimed in claim 6, wherein a joint part of said other one of said top-side and bottom-side coil terminals is bent radially with respect to said stator. 
     
     
       10. The rotating electric apparatus as claimed in claim 9, wherein said joint parts of said one of said top-side and bottom-side coil terminals and said other one of said top-side and bottom-side coil terminals are bent radially outward. 
     
     
       11. The rotating electric apparatus as claimed in claim 9, wherein said joint parts of said one of said top-side and bottom-side coil terminals and said other one of said top-side and bottom-side coil terminals are arranged outside of said coil end. 
     
     
       12. The rotating electric apparatus as claimed in claim 9, wherein edge portions of said joint parts are pointing toward radially outside.