Abstract:
A stator winding structure of a motor or a generator includes plural separate different-shaped rod conductors combined to form a collective winding structure to take the place of a conventional winding structure which has a coil wire wound continuously. The different-shaped rod conductors can be designed in shape to match with the sizes of the coil slots to increase a slot occupied rate of the conductors and to prevent the conductors from bent during the coil winding process. The stator winding structure is especially applicable to a motor or a generator with large power and difficult in multi-electrode winding, facilitating winding and enhancing a slot occupied rate of the conductors and also reducing copper loss during output of large current.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   This invention relates to a stator winding structure of a motor or a generator, particularly to one provided with separated intermediate different-shaped rod conductors combined together to form a collective winding structure to take the place of a conventional stator winding structure in which a coil wire is wound continuously. The intermediate different-shaped rod conductors in the coil slots can be designed to match with the sizes of the coil slots to increase a slot occupied rate of the conductors, able to prevent the coil wires from being bent in a winding process, applicable to a motor or a generator with large power and difficult in multi-electrode winding, and able to facilitate winding, to increase a slot occupied rate in a multi-electrode stator structure and to lower copper loss during output of large current. 
   2. Description of the Prior Art 
   Generally, a motor or a generator with concentrated winding is better than a motor or a generator with separate winding in output efficiency and output power and radiation capability if they are of the same size. In a process of winding, conventional coil conducting wires must be bent for 180 degrees when they come out of a coil slot and go into another coil slot; therefore, the larger the cross-section of the coil wires is, the more the stator electrodes will have, and the harder the winding work will become, and also the lower the slot occupied rate of the wire will be. In stator winding of a motor or a generator, collective winding is much harder than conventional divided winding. For the present, a motor or a generator with collective winding usually has a large cross-section of a coil wire and many stator electrodes, thus increasing difficulty in coil winding and heightening winding cost. Further, it is hard to bend a coil wire with an excessively large cross-section. 
   However, the cross-section of a coil wire should be first be taken into consideration in case a motor or a generator needs to output large power, because, when current flows through the coil wire, copper loss caused by resistance will generate extremely high heat energy and the coil wire is likely to be burned to form short circuit and subsequent danger. Therefore, the cross-section of the coil wire of the stator of a large-power motor or generator has to be enlarged as much as possible so as to diminish resistance and lower copper loss when the motor or the generator output large current. 
   Due to difficulty in winding of a coil wire with a large cross-section and high winding cost, a motor or a generator with collective winding is only applicable to equipment or electric carriers with small power output. 
   SUMMARY OF THE INVENTION 
   The objective of the invention is to offer a stator winding structure of a motor or a generator, provided with a silicon-steel sheet stator with a plurality of coil slots, plural different-shaped rod conductors insulated mutually to be inserted in the coil slots of the stator, and plural front conducting plates and rear conducting plates to be connected with the different rod-shaped conductors. The front and the rear conducting plates and the different rod-shaped rod conductors are connected together to form a collective winding structure in accordance with the sequence designed. In such winding structure, only the contact surfaces of the connected conductors and the connectors of a three-phase electric power are conductive, while the other surfaces of the conductors are insulated so as to avoid a short circuit. 

   
     BRIEF DESCRIPTION OF DRAWINGS 
     This invention will be better understood by referring to the accompanying drawings, wherein: 
       FIG. 1  is an exploded perspective view of a first preferred embodiment of a stator in the present invention: 
       FIG. 2  is an exploded perspective view of the first preferred embodiment of stator coil slots in the present invention: 
       FIG. 3  is a front perspective view of the first preferred embodiment of the stator coil slots in the present invention: 
       FIG. 4  is a rear perspective view of the first preferred embodiment of the stator coil slots in the present invention: 
       FIG. 5  is a cross-sectional view of the first preferred embodiment of the stator coil slots in the present invention: 
       FIG. 6  is an evolved view of the first preferred embodiment of an A-phase coil winding structure and current flowing directions in the present invention: 
       FIG. 7  is an exploded perspective view of the portion A in  FIG. 3 : 
       FIG. 8  is an evolved view of the first preferred embodiment of a B-phase coil winding structure and current flowing directions in the present invention: 
       FIG. 9  is an evolved view of the first preferred embodiment of a C-phase coil winding structure and current flowing directions in the present invention: 
       FIG. 10  is a front perspective view of a second preferred embodiment of the stator of an outer rotor motor in the present invention: 
       FIG. 11  is a rear perspective view of the second preferred embodiment of the stator of an outer rotor motor in the present invention: 
       FIG. 12  is a perspective view of a third preferred embodiment of the stator of an inner rotor motor in the present invention: 
       FIG. 13  is an exploded perspective view of the portion marked B in  FIG. 12 : 
       FIG. 14  is a perspective view of a fourth preferred embodiment of the stator of an inner rotor motor in the present invention: 
       FIG. 15  is an exploded perspective view of the portion marked C in  FIG. 14 : 
       FIG. 16  is a perspective view of a fifth preferred embodiment of an inner rotor motor having two conductors in each coil slot connected by nuts in the present invention: 
       FIG. 17  is an exploded perspective view of the portion marked D in  FIG. 16 : 
       FIG. 18  is a perspective view of a sixth preferred embodiment of an inner rotor motor having two conductors in each coil slot connected by bolts in the present invention: 
       FIG. 19  is an exploded perspective view of the portion marked E in  FIG. 18 : 
       FIG. 20  is a perspective view of a seventh preferred embodiment of the stator of an inner rotor motor in the present invention: and 
       FIG. 21  is an exploded perspective view of the portion marked F in  FIG. 20 . 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   The stator winding structure in the present invention is a collective winding structure so the number of coil slots and the number of electrodes of rotors are related to a definite extent. The following lists are different combinations of the number of coil slots and electrodes of the rotors, which are applicable to a three-phase motor or generator with a collective winding structure. 
   
     
       
             
           
             
             
             
           
             
             
             
           
         
             
               TABLE 1 
             
           
           
             
                 
             
             
               Number of coil slots/number of rotor electrodes = 0.75 
             
           
        
         
             
                 
                 
               Number of rotor 
             
             
                 
               Number of coil slots 
               electrodes 
             
             
                 
                 
             
           
        
         
             
                 
               3 
               4 
             
             
                 
               6 
               8 
             
             
                 
               9 
               12 
             
             
                 
               12 
               16 
             
             
                 
               15 
               20 
             
             
                 
               18 
               24 
             
             
                 
               21 
               28 
             
             
                 
               24 
               32 
             
             
                 
                 
             
           
        
       
     
   
   
     
       
             
           
             
             
             
           
             
             
             
           
         
             
               TABLE 2 
             
           
           
             
                 
             
             
               Number of coil slots/number of rotor electrodes = 1.125 
             
           
        
         
             
                 
               Number of coil slots 
               Number of rotor electrodes 
             
             
                 
                 
             
           
        
         
             
                 
               9 
               8 
             
             
                 
               18 
               16 
             
             
                 
               27 
               24 
             
             
                 
               36 
               32 
             
             
                 
               45 
               40 
             
             
                 
                 
             
           
        
       
     
   
   
     
       
             
           
             
             
             
           
             
             
             
           
         
             
               TABLE 3 
             
           
           
             
                 
             
             
               Number of coil slots/number of rotor electrodes = 1.5 
             
           
        
         
             
                 
                 
               Number of rotor 
             
             
                 
               Number of coil slots 
               electrodes 
             
             
                 
                 
             
           
        
         
             
                 
               3 
               2 
             
             
                 
               6 
               4 
             
             
                 
               9 
               6 
             
             
                 
               12 
               8 
             
             
                 
               15 
               10 
             
             
                 
               18 
               12 
             
             
                 
               21 
               14 
             
             
                 
               24 
               16 
             
             
                 
                 
             
           
        
       
     
   
   
     
       
             
           
             
             
             
           
         
             
               TABLE 4 
             
           
           
             
                 
             
             
               other combinations (only listed to 33 slots) 
             
           
        
         
             
                 
                 
               Number of rotor 
             
             
                 
               Number of coil slots 
               electrodes 
             
             
                 
                 
             
             
                 
               12 
               10 
             
             
                 
               12 
               18 
             
             
                 
               18 
               14 
             
             
                 
               21 
               16 
             
             
                 
               24 
               20 
             
             
                 
               27 
               18 
             
             
                 
               27 
               20 
             
             
                 
               27 
               22 
             
             
                 
               30 
               20 
             
             
                 
               30 
               22 
             
             
                 
               30 
               26 
             
             
                 
               33 
               22 
             
             
                 
               33 
               26 
             
             
                 
               33 
               28 
             
             
                 
                 
             
           
        
       
     
   
   A first preferred embodiment of the stator winding structure of a three-phase inner rotor motor in the present invention, as shown in  FIGS. 1 to 9 , includes a stator  1  with 45 coil slots, two intermediate different-shaped rod conductors having the same cross-section and insulated mutually as shown in  FIG. 5 , and a plurality of front conductors and rear conductors connected together. 
   The sequence of inserting the intermediate different-shaped rod conductors in the coil slots is described as follows. 
   Intermediate different-shaped rod conductors  11 ,  12  are inserted in the slot (S 01 ), intermediate different-shaped rod conductors  21 ,  22  inserted in the slot (S 02 ), intermediate different-shaped rod conductors  31 ,  32  inserted in the slot (S 03 ), intermediate different-shaped rod conductors  41 ,  42  inserted in the slot (S 04 ), intermediate different-shaped rod conductors  51 ,  52  inserted in the slot (S 05 ), intermediate different-shaped rod conductors  61 ,  62  inserted in the slot (S 06 ), intermediate different-shaped rod conductors  71 ,  72  inserted in the slot (S 07 ), intermediate different-shaped rod conductors  81 ,  82  inserted in the slot (S 08 ), intermediate different-shaped rod conductors  91 ,  92  inserted in the slot (S 09 ), intermediate different-shaped rod conductors  101 ,  102  inserted in the slot (S 10 ), intermediate different-shaped rod conductors  111 ,  112  inserted in the slot (S 11 ), intermediate different-shaped rod conductors  121 ,  122  inserted in the slot (S 12 ), intermediate different-shaped rod conductor  141 ,  142  inserted in the slot (S 14 ), intermediate different-shaped rod conductors  151 ,  152  inserted in the slot (S 15 ), intermediate different-shaped rod conductor  161 ,  162  inserted in the slot (S 16 ), intermediate different-shaped rod conductors  171 ,  172  inserted in the slot (S 17 ), intermediate different-shaped rod conductors  181 ,  182  inserted in the slot (S 18 ), intermediate different-shaped rod conductors  191 ,  192  inserted in the slot (S 19 ), intermediate different-shaped rod conductors  201 ,  202  inserted in the slot (S 20 ), intermediate different-shaped rod conductors  211 ,  212  inserted in the slot (S 21 ), intermediate different-shaped rod conductors  221 ,  222  inserted in the slot (S 22 ), intermediate different-shaped rod conductors  231 ,  232  inserted in the slot (S 23 ), intermediate different-shaped rod conductors  241 ,  242  inserted in the slot (S 24 ), intermediate different-shaped rod conductors  251 ,  252  inserted in the slot (S 25 ), intermediate different-shaped rod conductors  261 ,  262  inserted in the slot (S 26 ), intermediate different-shaped rod conductors  271 ,  272  inserted in the slot (S 27 ), intermediate different-shaped rod conductors  282 ,  282  inserted in the slot (S 28 ), intermediate different-shaped rod conductors  292 ,  292  inserted in the slot (S 29 ), intermediate different-shaped rod conductors  301 ,  302  inserted in the slot (S 30 ), intermediate different-shaped rod conductors  311 ,  312  inserted in the slot (S 31 ), intermediate different-shaped rod conductors  321 ,  322  inserted in the slot (S 32 ), intermediate different-shaped rod conductors  331 ,  332  inserted in the slot (S 33 ), intermediate different-shaped rod conductors  341 ,  342  inserted in the slot (S 34 ), intermediate different-shaped rod conductors  351 ,  352  inserted in the slot (S 35 ), intermediate different-shaped rod conductors  361 ,  362  inserted in the slot (S 36 ), intermediate different-shaped rod conductors  371 ,  372  inserted in the slot (S 37 ), intermediate different-shaped rod conductors  281 ,  382  inserted in the slot (S 38 ), intermediate different-shaped rod conductors  391 ,  392  inserted in the slot (S 39 ), intermediate different-shaped rod conductors  401 ,  402  inserted in the slot (S 40 ), intermediate different-shaped rod conductors  411 ,  412  inserted in the slot (S 41 ), intermediate different-shaped rod conductors  421 ,  422  inserted in the slot (S 42 ), intermediate different-shaped rod conductors  431 ,  432  inserted in the slot (S 43 ), intermediate different-shaped rod conductors  441 ,  442  inserted in the slot (S 44 ), and intermediate different-shaped rod conductors  451 ,  452  inserted in the slot (S 45 ). 
   According to the sequence of the collective winding structure, each rod conductor has its opposite ends respectively connected with the input terminals (A 00 ), (B 00 ), (C 00 ) of three-phase power and the front conductor (A 02 , A 04 , A 06 , A 08 , A 10 , A 12 , A 14 , A 16 , A 18 , AA 20 , A 22 , A 24 , A 26 , A 28 , B 02 , B 04 , B 06 , B 08 , B 10 , B 12 , B 14 , B 16 , B 18 , B 20 , B 22 , B 24 , B 26 , B 28 , C 02 , C 04 , C 06 , C 08 , C 10 , C 12 , C 14 , C 16 , C 18 , C 20 , C 22 , C 24 , C 26 , C 28 , G 00 ) and the rear conductor (A 01 , A 03 , A 05 , A 07 , A 09 , A 11 , A 13 , A 15 , A 17 , A 19 , A 21 , A 23 , A 25 , A 27 , A 29 , B 01 , B 03 , B 05 , B 07  B 09 , B 11 , B 13 , B 15 , B 17 , B 19 , B 21 , B 23 , B 25 , B 27 , B 29 , C 01 , C 03 , C 05 , C 07 , C 09 , C 11 , C 13 , C 15 , C 17 , C 19 , C 21 , C 23 , C 25 , C 27 , C 29 ). 
   Each front conductor and each rear conductor is respectively bored with two position holes  10 , and each intermediate different-shaped rod conductor has the opposite ends respectively provided with a position pin  20  to be orderly inserted in the position hole  10  of the front and the rear conductor. Then, the connected portions of the intermediate different-shaped rod conductors with the input terminals of the three-phase power and the front and the rear conductors are connected by firm combination or by soldering. The contact surfaces of the connected conductors and the connectors of the three-phase power are conductive, but the other surfaces of the conductors are insulated to avoid a short circuit. 
   According to the given numbers, the connecting sequence of the conductors, taking A-phase coil winding for example, is described as follows, as shown in  FIG. 6 , assuming that coil winding and coil slots are flattened. 
   The input terminal (A 00 ) of the A-phase power is connected with the intermediate different-shaped rod conductor  11  in the coil slot (S 01 ), and the intermediate different-shaped rod conductor  11  has the other end connected with the intermediate different-shaped rod conductor  21  in the coil slot (S 02 ) by the rear conductor (A 01 ). Then, the intermediate different-shaped rod conductor  21  in the coil slot (S 02 ) has the other end connected with the intermediate different-shaped rod conductor  31  in the coil slot (S 03 ) by the front conductor (A 02 ), and the intermediate different-shaped rod conductor  31  in the coil slot (S 03 ) has the other end connected with the intermediate different-shaped rod conductor  22  in the coil slot (S 02 ) by the rear conductor (A 03 ). Then, the intermediate different-shaped rod conductor  22  in the coil slot (S 02 ) has the other end connected with the intermediate different-shaped rod conductor  32  in the coil slot (S 03 ) by the front conductor (A 04 ), and the intermediate different-shaped rod conductor  32  in the coil slot (S 03 ) has the other end connected with the intermediate different-shaped rod conductor  42  in the coil slot (S 04 ) by the rear conductor (A 05 ), and the intermediate different-shaped rod conductor  42  in the coil slot (S 04 ) has the other end connected with the intermediate different-shaped rod conductor  101  in the coil slot (S 10 ) by the front conductor (A 06 ), and then repeat the above-mentioned steps. According to the given number, the combining sequence of the intermediate different-shaped rod conductors with the front conductors, and the rear conductors is: A 00 ,  11 , A 01 ,  21 , A 02 ,  31 , A 03 ,  22 , A 04 ,  32 , A 05 ,  42 , A 06 ,  101 , A 07 ,  111 , A 08 ,  121 , A 09 ,  112 , A 10 ,  122 , A 11 ,  132 , A 12 ,  191 , A 13 ,  201 , A 14 ,  211 , A 15 ,  202 , A 16 ,  212 , A 17 ,  222 , A 18 ,  281 , A 19 ,  291 , A 20 ,  301 , A 21 ,  292 , A 22 ,  302 , A 23 ,  312 , A 24 ,  371 , A 25 ,  381 , A 26 ,  391 , A 27 ,  382 , A 28 ,  392 , A 29 ,  402 , G 00 . 
     FIG. 7  shows a partial A-phase coil of the 45-slot stator  1  of an inner rotor motor. The input terminal (A 00 ) of the A-phase power and the front conductors (A 02 ), (A 04 ), (A 06 ) and the intermediate different-shaped rod conductors  11 ,  21 ,  22 ,  31 ,  32 ,  42  and the rear conductors (A 01 ), (A 03 ), (A 05 ) are connected together to form a collective winding structure having two conductors respectively positioned in the coil slot (S 01 ), (S 02 ), (S 03 ) and (S 04 ) of the stator  1 . Each front conductor and each rear conductor are respectively bored with two position holes  10 , and each intermediate different-shaped rod conductor has its opposite ends respectively provided with a position pin  20  to be orderly inserted in the position hole of the front and the rear conductor. Then, the connected portions of the intermediate different-shaped rod conductors with the front and the rear conductors are connected by tight combination or by soldering. The contact surfaces of the connected conductors and the connectors of the three-phase current supply are conductible, but the other surfaces of the conductors are insulated to avoid short circuit. 
   The connecting sequence of the conductors in B-phase coil winding is described as follows, as shown in  FIG. 8 , assuming that the coil winding and the coil slots are flattened. 
   The input terminal (B 00 ) of the B-phase power is connected with the intermediate different-shaped rod conductor  41  in the coil slot (S 04 ) and the other end of the intermediate different-shaped rod conductor  41  is connected with the intermediate different-shaped rod conductor  51  in the coil slot (S 05 ) by the rear conductor (B 01 ). Then, the intermediate different-shaped rod conductor  51  in the coil slot (S 05 ) has the other end connected with the intermediate different-shaped rod conductor  61  in the coil slot (S 06 ) by the front conductor (B 02 ) and the intermediate different-shaped rod conductor  61  in the coil slot (S 06 ) has the other end connected with the intermediate different-shaped rod conductor  52  in the coil slot (S 05 ) by the rear conductor (B 03 ). Then, the intermediate different-shaped rod conductor  52  in the coil slot (S 05 ) has the other end connected with the intermediate different-shaped rod conductor  62  in the coil slot (S 06 ) by the front conductor (B 04 ) and the intermediate different-shaped rod conductor  62  in the coil slot (S 06 ) has the other end connected with the intermediate different-shaped rod conductor  72  in the coil slot (S 07 ) by the rear conductor (B 05 ), and the intermediate different-shaped rod conductor  72  in the coil slot (S 07 ) has the other end connected with the intermediate different-shaped rod conductor  131  in the coil slot (S 13 ) by the front conductor (B 06 ) and then repeat the foresaid steps. In accordance with the given number, the connecting sequence of the intermediate different-shaped rod conductors with the front conductors and the rear conductors are listed below. 
   B 00 ,  41 , B 01 ,  51 , B 02 ,  61 , B 03 ,  52 , B 04 ,  62 , B 05 ,  72 , B 06 ,  131 , B 07 ,  141 , B 08 ,  151 , B 09 ,  142 , B 10 ,  152 , B 11 ,  162 , B 12 ,  221 , B 13 ,  231 , B 14 ,  241 , B 15 ,  232 , B 16 ,  242 , B 17 ,  252 , B 18 ,  311 , B 19 ,  321 , B 20 ,  331 , B 21 ,  322 , B 22 ,  332 , B 23 ,  342 , B 24 ,  401 , B 25 ,  411 , B 26 ,  421 , B 27 ,  412 , B 28 ,  422 , B 29 ,  432 , G 00 . 
   The connecting sequence of the conductors in C-phase coil winding is described as follows, as shown in  FIG. 9 , assuming that the coil winding and the coil slots are flattened. 
   The input terminal (C 00 ) of the C-phase current supply is connected with the intermediate different-shaped rod conductor  71  in the coil slot (S 07 ) and the rod conductor  71  has the other end connected with the intermediate different-shaped rod conductor  81  in the coil slot (S 08 ) by the rear conductor (C 01 ). Then, the intermediate different-shaped rod conductor  81  in the coil slot (S 08 ) has the other end connected with the intermediate different-shaped rod conductor  91  in the coil slot (S 09 ) by the front conductor (S 02 ), and the intermediate different-shaped rod conductor  91  in the coil slot (S 09 ) has the other end conducted with the intermediate different-shaped rod conductor  82  in the coil slot (S 08 ) by the rear conductor (C 03 ). Then, the intermediate different-shaped rod conductor  82  in the coil slot (S 08 ) has the other end connected with the intermediate different-shaped rod conductor  92  in the coil slot (S 09 ) by the front conductor (C 04 ) and the intermediate different-shaped rod conductor  92  in the coil slot (S 09 ) has the other end connected with the intermediate different-shaped rod conductor  102  in the coil slot (S 10 ) by the rear conductor (C 05 ), and the intermediate different-shaped rod conductor  102  in the coil slot (S 10 ) has the other end connected with the intermediate different-shaped rod conductor  161  in the coil slot (S 16 ) by the front conductor (C 06 ) and then repeat the foresaid steps. The connecting sequence of the intermediate different-shaped rod conductors with the front and the rear conductors in the C-phase winding structure is listed below. C 00 ,  71 , C 01 ,  81 , C 02 ,  91 , C 03 ,  82 , C 04 ,  92 , C 05 ,  102 , C 06 ,  161 , C 07 ,  171 , C 08 ,  181 , C 09 ,  172 , C 10 ,  182 , C 11 ,  192 , C 12 ,  251 , C 13 ,  261 , C 14 ,  271 , C 15 ,  262 , C 16 ,  272 , C 17 ,  282 , C 18 ,  341 , C 19 ,  351 , C 20 ,  361 , C 21 ,  352 , C 22 ,  362 , C 23 ,  372 , C 24 ,  431 , C 25 ,  441 , C 26 ,  451 , C 27 ,  442 , C 28 ,  452 , C 29 ,  12 , G 00 . Lastly, the rod conductors  402 ,  432  and  12  are connected by the front conductor G 00  to form a short circuit. 
   A second preferred embodiment of a 45-slot stator winding structure of an outer rotor motor in the present invention, as shown in  FIGS. 10 ,  11 , has the same coil winding structure and connection modes as those of the 45-slot stator of the inner rotor motor described in the first preferred embodiment, except that only the open sides of the 45 coil slots of the stator  2  of the outer rotor motor face the exterior, and that the open sides of the 45 coil slots of the stator  1  of the inner rotor motor face the interior. 
   The stator coil winding structure of the outer rotor motor is formed by connecting the intermediate different-shaped rod conducts with the front and the rear conducts together, and these conductors can be cast or forged into U-shaped or L-shaped rod conductors to be connected to form a coil winding structure, able to decrease the number of the conductors and the contact surfaces of the winding structure, and to reduce difficulty in assembling and soldering. 
   A third preferred embodiment of the stator coil winding structure of an inner rotor motor in the present invention, as shown in  FIGS. 12 and 13 , includes a stator  3  having 45 coil slots, plural U-shaped conductors, and plural different-shaped rod conductors and rear conductors connected together. 
   The coil slot (S 301 ), (S 302 ), (S 303 ) and (S 304 ) of the stator  3  are respectively inserted therein with the input terminal (A 00 ) of A-phase power and the U-shaped conductors (U 3 ), (U 5 ), (U 7 ) and the different-shaped rod conductor (U 1 ) and the rear conductors (U 2 ), (U 4 ), (U 6 ) to form a collective winding structure having two conductors positioned in each coil slot. 
   A fourth preferred embodiment of the stator coil winding structure of an inner rotor motor in the present invention, as shown in  FIGS. 14 and 15 , includes a stator  4  having 45 coil slots, plural L-shaped conductors and plural different-shaped rod conductors connected together. 
   The coil slots (S 401 ), (S 402 ), (S 403 ) and (S 404 ) of the stator  4  are respectively inserted therein with the input terminal (A 300 ) of A-phase power and the L-shaped conductors L 2 , L 3 , L 4 , L 5 , L 6 , L 7  and the different-shaped rod conductor L 1  to form a collective winding structure having two conductors positioned in each coil slot. 
   A fifth preferred embodiment of the stator coil winding structure of a motor or a generator in the present invention, as shown in  FIGS. 16 and 17 , includes the intermediate different-shaped rod conductors and the front conductors and the rear conductors connected together. Every two conductors are connected by soldering or having the two position pins  20  on the opposite ends of the intermediate different-shaped rod conductor thread-milled and then respectively inserted through the front and the rear conductor and locked by nuts  30 . 
   A sixth preferred embodiment of the stator coil winding structure of a motor or a generator in the present invention, as shown in  FIGS. 18 and 19 , includes the intermediate different-shaped rod conductors and the front conductors and the rear conductors connected together. Every two conductors are connected by soldering or having the opposite ends of the intermediate different-shaped rod conductor  11  respectively bored with a threaded hole  40  to be locked with the front and the rear conductor by bolts  50 . The fifth and the sixth embodiment are a little simplified in their assembly. 
   A seventh preferred embodiment of the stator coil winding structure of an inner rotor motor in the present invention, as shown in  FIGS. 20 and 21 , includes intermediate different-shaped rod conductors, front conductors and rear conductors connected together. The coil slot (S 501 ), (S 502 ), (S 503 ) and (S 504 ) of the stator  5  are respectively inserted therein with the input terminal (A 400 ) of A-phase power and the intermediate different-shaped rod conductors (M 11 ), (M 12 ), (M 21 ), (M 22 ), (M 23 ), (M 24 ), (M 31 ), (M 32 ), (M 33 ), (M 34 ), (M 43 ), (M 44 ) and the front conductors (N 2 ), (N 4 ), (N 6 ), (N 8 ), (N 10 ), (N 12 ) and the rear conductors (N 1 ), (N 3 ), (N 5 ), (N 7 ), (N 9 ), (N 11 ) connected together to form a collective winding structure having four conductors in each coil slot. 
   To sum up, this invention has the following advantages. 
   1. The separated stator coil winding structure is applicable to various motors of different powers by increasing the wire-wound number of the coil and changing the number of the conductors in each coil slot. 
   2. It can avoid short circuit and prevent conductors from being bent when they go in and come out of the coil slots during coil winding. 
   3. It is able to increase a slot occupied rate of conductors and reduce copper loss during output of large current. 
   While the preferred embodiments of the invention have been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention.