Stator winding structure and motor
By using bridge wires and bent wires in the stator winding structure of BLDC and PMSM motors, the problems of increased connectors and insufficient space during winding were solved, and a high slot fill factor winding process was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN FENDA TECH CO LTD
- Filing Date
- 2025-04-08
- Publication Date
- 2026-05-05
AI Technical Summary
Existing stator winding methods for BLDC and PMSM motors require additional connectors such as PCB boards or copper clips, and the diagonal winding will occupy winding space, resulting in insufficient winding space.
The stator winding structure is adopted, and by setting bridging lines and bending lines on the winding teeth, the winding teeth and wire slots are alternately distributed, and the bending lines are set laterally in the wire slots, which reduces the number of connectors and avoids occupying the winding space.
It achieves a high slot fill rate winding process, eliminating the need for additional connectors and welding processes, ensuring ample winding space, and is suitable for widespread application.
Smart Images
Figure CN224204852U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor structure technology, and in particular to a stator winding structure and a motor. Background Technology
[0002] An electric motor is a device that converts electrical energy into mechanical energy. It utilizes the rotating magnetic field generated by energized coils in the stator, which acts on the rotor to create magnetoelectric torque. Both BLDC (brushless DC motor) and PMSM (permanent magnet synchronous motor) are types of electric motors. BLDC and PMSM motors have a relatively large number of slot poles. Currently, the two main winding methods used for the stator of BLDC and PMSM motors are as follows:
[0003] Method 1: One winding per tooth, with two outgoing wires, which are the inlet and outlet wires of the winding. After completion, it is connected with PCB or other metal. This winding method can meet the process requirements of high slot fill rate. However, this winding method adds additional connecting parts, such as PCB board or other copper buckle connectors. In order to ensure the reliability of the connection, additional processes such as welding or buckling will be added at the connection.
[0004] Method 2: Each phase winding is wound in one go. When the winding passes from the first winding tooth to the second winding tooth, the winding passes diagonally in the middle. However, this method will occupy the winding space of the second winding tooth, which will lead to insufficient winding space in the subsequent winding. Utility Model Content
[0005] This utility model provides a stator winding structure and a motor, aiming to solve the technical problems in the prior art where the stator of the motor needs to be equipped with additional connecting parts during the winding process, such as PCB boards or other copper buckles, and additional processes such as welding or buckling are added at the connection to ensure the reliability of the connection; or, when the winding passes from the first winding tooth to the second winding tooth, the middle winding is diagonal, which occupies the winding space of the second winding tooth and leads to insufficient winding space in the subsequent winding.
[0006] This utility model provides a stator winding structure, including:
[0007] A stator core assembly, the stator core assembly including an annular frame and a plurality of winding teeth spaced apart and protruding on the outer wall of the annular frame, wherein any two adjacent winding teeth and a portion of the outer wall of the annular frame enclose a wire groove, and each winding tooth and each wire groove are alternately distributed along the circumference of the annular frame;
[0008] The stator winding is housed in each of the slots and wound on each of the winding teeth. The stator winding includes several phase windings. Each phase winding includes two lead ends, several bridging wires spanning multiple winding teeth, and several coil groups wound on adjacent winding teeth. The bridging wires and the two lead ends are connected to the corresponding coil groups. Each coil group includes two coils and a bent wire connected to the two coils at both ends. The two coils are wound on corresponding two winding teeth. The coils are connected to the corresponding bridging wires or lead ends. The bent wires are arranged laterally and located in the slots, and the bent wires are located near the top or bottom of the ring frame.
[0009] Furthermore, the windings of the plurality of phases include a first phase winding, a second phase winding, and a third phase winding. The first phase winding has a first lead end and a second lead end. The second phase winding has a third lead end and a fourth lead end. The third phase winding has a fifth lead end and a sixth lead end. The first lead end, the third lead end, and the fifth lead end all extend and protrude from one side of the stator core assembly. The second lead end, the fourth lead end, and the sixth lead end all extend and protrude from the other side of the stator core assembly.
[0010] Furthermore, the first phase winding also includes a first bridging wire, a second bridging wire, a third bridging wire, a fourth bridging wire, a fifth bridging wire, a first coil group connected between the first lead end and the first bridging wire, a second coil group connected between the first bridging wire and the second bridging wire, a third coil group connected between the second bridging wire and the third bridging wire, a fourth coil group connected between the third bridging wire and the fourth bridging wire, a fifth coil group connected between the fourth bridging wire and the fifth bridging wire, and a sixth coil group connected between the fifth bridging wire and the second lead end;
[0011] The second phase winding further includes a sixth bridge wire, a seventh bridge wire, an eighth bridge wire, a ninth bridge wire, a tenth bridge wire, a seventh coil group connected between the third lead end and the sixth bridge wire, an eighth coil group connected between the sixth bridge wire and the seventh bridge wire, a ninth coil group connected between the seventh bridge wire and the eighth bridge wire, a tenth coil group connected between the eighth bridge wire and the ninth bridge wire, an eleventh coil group connected between the ninth bridge wire and the tenth bridge wire, and a twelfth coil group connected between the tenth bridge wire and the fourth lead end;
[0012] The third phase winding further includes an eleventh bridge wire, a twelfth bridge wire, a thirteenth bridge wire, a fourteenth bridge wire, a fifteenth bridge wire, a thirteenth coil group connected between the fifth lead end and the eleventh bridge wire, a fourteenth coil group connected between the eleventh bridge wire and the twelfth bridge wire, a fifteenth coil group connected between the twelfth bridge wire and the thirteenth bridge wire, a sixteenth coil group connected between the thirteenth bridge wire and the fourteenth bridge wire, a seventeenth coil group connected between the fourteenth bridge wire and the fifteenth bridge wire, and an eighteenth coil group connected between the fifteenth bridge wire and the sixth lead end.
[0013] Furthermore, the first lead end, the third lead end, the fifth lead end, the second bridging wire, the fourth bridging wire, the seventh bridging wire, the ninth bridging wire, the twelfth bridging wire, and the fourteenth bridging wire are all disposed close to the ground side of the ring frame, while the second lead end, the fourth lead end, the sixth lead end, the first bridging wire, the third bridging wire, the fifth bridging wire, the sixth bridging wire, the eighth bridging wire, the tenth bridging wire, the eleventh bridging wire, the thirteenth bridging wire, and the fifteenth bridging wire are all disposed close to the top side of the ring frame.
[0014] Furthermore, both the winding teeth and the wire grooves are provided with thirty-six teeth, and each winding tooth includes a first winding tooth, a second winding tooth, a third winding tooth, a fourth winding tooth, a fifth winding tooth, a sixth winding tooth, a seventh winding tooth, an eighth winding tooth, a ninth winding tooth, a tenth winding tooth, an eleventh winding tooth, a twelfth winding tooth, a thirteenth winding tooth, a fourteenth winding tooth, a fifteenth winding tooth, a sixteenth winding tooth, a seventeenth winding tooth, an eighteenth winding tooth, a nineteenth winding tooth, a twentieth winding tooth, a twenty-first winding tooth, a twenty-second winding tooth, a twenty-third winding tooth, a thirty-fourth winding tooth, a thirty-fifth winding tooth, and a thirty-sixth winding tooth arranged sequentially along the circumference.
[0015] The first coil group is sleeved on the first winding tooth and the second winding tooth; the second coil group is sleeved on the seventh winding tooth and the eighth winding tooth; the third coil group is sleeved on the thirteenth winding tooth and the fourteenth winding tooth; the fourth coil group is sleeved on the nineteenth winding tooth and the twentieth winding tooth; the fifth coil group is sleeved on the twenty-fifth winding tooth and the twenty-sixth winding tooth; and the sixth coil group is sleeved on the thirty-first winding tooth and the thirty-second winding tooth.
[0016] The seventh coil group is sleeved on the fifth and sixth winding teeth; the eighth coil group is sleeved on the eleventh and twelfth winding teeth; the ninth coil group is sleeved on the seventeenth and eighteenth winding teeth; the tenth coil group is sleeved on the twenty-third and twenty-fourth winding teeth; the eleventh coil group is sleeved on the twenty-ninth and thirtieth winding teeth; and the twelfth coil group is sleeved on the thirty-fifth and thirty-sixth winding teeth.
[0017] The thirteenth coil group is sleeved on the ninth and tenth winding teeth, the fourteenth coil group is sleeved on the fifteenth and sixteenth winding teeth, the fifteenth coil group is sleeved on the twenty-first and twenty-second winding teeth, the sixteenth coil group is sleeved on the twenty-seventh and twenty-eighth winding teeth, the seventeenth coil group is sleeved on the thirty-third and thirty-fourth winding teeth, and the eighteenth coil group is sleeved on the third and fourth winding teeth.
[0018] Furthermore, the first coil group includes a first bent wire and two first coils. The two first coils are respectively mounted on the first winding tooth and the second winding tooth. One end of the two first coils is respectively connected to the first lead end and the first bridge wire, and the other end of the two first coils is respectively connected to both ends of the first bent wire.
[0019] The second coil group includes a second bent wire and two second coils. The two second coils are respectively mounted on the seventh winding tooth and the eighth winding tooth. One end of the two second coils is respectively connected to the first bridge wire and the second bridge wire, and the other end of the two second coils is respectively connected to both ends of the second bent wire.
[0020] The third coil group includes a third bent wire and two third coils. The two third coils are respectively mounted on the thirteenth winding tooth and the fourteenth winding tooth. One end of the two third coils is respectively connected to the second bridge wire and the third bridge wire, and the other end of the two third coils is respectively connected to both ends of the third bent wire.
[0021] The fourth coil group includes a fourth bend wire and two fourth coils. The two fourth coils are respectively mounted on the nineteenth winding tooth and the twentieth winding tooth. One end of the two fourth coils is respectively connected to the third bridge wire and the fourth bridge wire, and the other end of the two fourth coils is respectively connected to both ends of the fourth bend wire.
[0022] The fifth coil group includes a fifth bent wire and two fifth coils. The two fifth coils are respectively mounted on the twenty-fifth winding tooth and the twenty-sixth winding tooth. One end of the two fifth coils is respectively connected to the fourth bridge wire and the fifth bridge wire, and the other end of the two fifth coils is respectively connected to both ends of the fifth bent wire.
[0023] The sixth coil group includes a sixth bend wire and two sixth coils. The two sixth coils are respectively mounted on the thirty-first winding tooth and the thirty-second winding tooth. One end of the two sixth coils is respectively connected to the fifth bridge wire and the second lead end, and the other end of the two sixth coils is respectively connected to both ends of the sixth bend wire.
[0024] Furthermore, the seventh coil group includes a seventh bent wire and two seventh coils. The two seventh coils are respectively mounted on the fifth winding tooth and the sixth winding tooth. One end of each of the two seventh coils is connected to the third lead end and the sixth bridge wire, respectively, and the other end of each of the two seventh coils is connected to both ends of the seventh bent wire.
[0025] The eighth coil group includes an eighth bent wire and two eighth coils. The two eighth coils are respectively mounted on the eleventh winding tooth and the twelfth winding tooth. One end of the two eighth coils is respectively connected to the sixth bridge wire and the seventh bridge wire, and the other end of the two eighth coils is respectively connected to both ends of the eighth bent wire.
[0026] The ninth coil group includes a ninth bend wire and two ninth coils. The two ninth coils are respectively mounted on the seventeenth winding tooth and the eighteenth winding tooth. One end of the two ninth coils is respectively connected to the seventh bridge wire and the eighth bridge wire, and the other end of the two ninth coils is respectively connected to both ends of the ninth bend wire.
[0027] The tenth coil group includes a tenth bend wire and two tenth coils. The two tenth coils are respectively mounted on the twenty-third winding tooth and the twenty-fourth winding tooth. One end of the two tenth coils is respectively connected to the eighth bridge wire and the ninth bridge wire, and the other end of the two tenth coils is respectively connected to both ends of the tenth bend wire.
[0028] The eleventh coil group includes an eleventh bend wire and two eleventh coils. The two eleventh coils are respectively mounted on the twenty-ninth winding tooth and the thirtieth winding tooth. One end of the two eleventh coils is respectively connected to the ninth bridge wire and the tenth bridge wire, and the other end of the two eleventh coils is respectively connected to both ends of the eleventh bend wire.
[0029] The twelfth coil group includes a twelfth bend wire and two twelfth coils. The two twelfth coils are respectively mounted on the thirty-fifth winding tooth and the thirty-sixth winding tooth. One end of the two twelfth coils is respectively connected to the tenth bridge wire and the fourth lead end, and the other end of the two twelfth coils is respectively connected to both ends of the twelfth bend wire.
[0030] Furthermore, the thirteenth coil group includes a thirteenth bend wire and two thirteenth coils. The two thirteenth coils are respectively mounted on the ninth winding tooth and the tenth winding tooth. One end of each of the two thirteenth coils is connected to the fifth lead end and the eleventh bridge wire, respectively, and the other end of each of the two thirteenth coils is connected to both ends of the thirteenth bend wire.
[0031] The fourteenth coil group includes a fourteenth bend wire and two fourteenth coils. The two fourteenth coils are respectively mounted on the fifteenth winding tooth and the sixteenth winding tooth. One end of the two fourteenth coils is respectively connected to the eleventh bridge wire and the twelfth bridge wire, and the other end of the two fourteenth coils is respectively connected to both ends of the fourteenth bend wire.
[0032] The fifteenth coil group includes a fifteenth bend wire and two fifteenth coils. The two fifteenth coils are respectively mounted on the twenty-first winding tooth and the twenty-second winding tooth. One end of the two fifteenth coils is respectively connected to the twelfth bridge wire and the thirteenth bridge wire, and the other end of the two fifteenth coils is respectively connected to both ends of the fifteenth bend wire.
[0033] The sixteenth coil group includes a sixteenth bend wire and two sixteenth coils. The two sixteenth coils are respectively mounted on the twenty-seventh winding tooth and the twenty-eighth winding tooth. One end of the two sixteenth coils is respectively connected to the thirteenth bridge wire and the fourteenth bridge wire, and the other end of the two sixteenth coils is respectively connected to both ends of the sixteenth bend wire.
[0034] The seventeenth coil group includes a seventeenth bend and two seventeenth coils. The two seventeenth coils are respectively mounted on the thirty-third winding tooth and the thirty-fourth winding tooth. One end of the two seventeenth coils is respectively connected to the fourteenth bridging wire and the fifteenth bridging wire, and the other end of the two seventeenth coils is respectively connected to both ends of the seventeenth bend.
[0035] The eighteenth coil group includes an eighteenth bend and two eighteenth coils. The two eighteenth coils are respectively mounted on the third winding tooth and the fourth winding tooth. One end of the two eighteenth coils is respectively connected to the fifteenth bridge wire and the sixth lead end, and the other end of the two eighteenth coils is respectively connected to both ends of the eighteenth bend.
[0036] Furthermore, the first bend line, the third bend line, the fifth bend line, the seventh bend line, the ninth bend line, the eleventh bend line, the thirteenth bend line, the fifteenth bend line, and the seventeenth bend line are all arranged close to the ground side of the ring frame;
[0037] The second, fourth, sixth, eighth, tenth, twelfth, fourteenth, sixteenth, and eighteenth bend lines are all located close to the top side of the ring frame.
[0038] This utility model also provides an electric motor, including the stator winding structure as described above.
[0039] Compared with the prior art, the beneficial effects of this utility model include at least the following:
[0040] In the stator winding structure of this utility model, each phase winding includes two lead ends, several bridging wires spanning multiple winding teeth, and several coil groups wound on two adjacent winding teeth. The bridging wires and the two lead ends are connected to the corresponding coil groups. This eliminates the need for traditional PCB boards or other copper clips and other additional connecting materials, and eliminates the need for welding or additional processes such as snap-fitting. During the winding process of each phase winding, there is a bending wire with a wire-passing function between the coils wound on the two winding teeth in each coil group. The bending wire is arranged horizontally and located in the wire slot, and the bending wire is set close to the top or bottom of the ring frame, instead of the traditional method of oblique wire passing or cross-over wire passing. This does not occupy the winding space and will not cause insufficient subsequent winding space. Under any circumstances, the winding conditions of high slot fill factor can be met, realizing the adjacent winding tooth winding process with high slot fill factor, which is suitable for widespread promotion. Attached Figure Description
[0041] Figure 1 A schematic diagram of the winding unfolding of the motor provided in an embodiment of this utility model;
[0042] Figure 2 This is a schematic diagram of the winding unfolding of the first phase winding provided in an embodiment of the present utility model;
[0043] Figure 3 This is a schematic diagram of the winding unfolding of the second phase winding provided in an embodiment of the present utility model;
[0044] Figure 4 This is a schematic diagram of the winding unfolding of the third phase winding provided in an embodiment of the present invention.
[0045] In the picture:
[0046] 10. Stator core assembly; 11. Winding teeth; 111. First winding tooth; 112. Second winding tooth; 113. Third winding tooth; 114. Fourth winding tooth; 115. Fifth winding tooth; 116. Sixth winding tooth; 117. Seventh winding tooth; 118. Eighth winding tooth; 119. Ninth winding tooth; 120. Tenth winding tooth; 121. Eleventh winding tooth; 122. Twelfth winding tooth; 123. Thirteenth winding tooth; 124. Fourteenth winding tooth; 125. Fifteenth winding tooth; 126. Sixteenth winding tooth; 127. Seventeenth winding tooth; 128. Eighteenth winding tooth; 129. Nineteenth winding tooth; 130. Twentieth winding tooth; 131. Twenty-first winding tooth; 132. Twenty-second winding tooth 133, Twenty-third winding tooth; 134, Twenty-fourth winding tooth; 135, Twenty-fifth winding tooth; 136, Twenty-sixth winding tooth; 137, Twenty-seventh winding tooth; 138, Twenty-eighth winding tooth; 139, Twenty-ninth winding tooth; 140, Thirtieth winding tooth; 141, Thirty-first winding tooth; 142, Thirty-second winding tooth; 143, Thirty-third winding tooth; 144, Thirty-fourth winding tooth; 145, Thirty-fifth winding tooth; 146, Thirty-sixth winding tooth; 20, Stator winding; 21, Winding; 211, Lead end; 212, Bridge wire; 213, Coil group; 2131, Coil; 2132, Bent wire; 22, First phase winding; 221, First lead end; 222, Second lead end Line ends; 223, First bridge wire; 224, Second bridge wire; 225, Third bridge wire; 226, Fourth bridge wire; 227, Fifth bridge wire; 228, First coil group; 2281, First bend wire; 2282, First coil; 229, Second coil group; 2291, Second bend wire; 2292, Second coil; 230, Third coil group; 2301, Third bend wire; 2302, Third coil; 231, Fourth coil group; 2311, Fourth bend wire; 2312, Fourth coil; 232, Fifth coil group; 2321, Fifth bend wire; 2322, Fifth coil; 233, Sixth coil group; 2331, Sixth bend wire; 2332, Sixth coil; 24, Second phase winding; 2 41. Third lead end; 242. Fourth lead end; 243. Sixth bridging wire; 244. Seventh bridging wire; 245. Eighth bridging wire; 246. Ninth bridging wire; 247. Tenth bridging wire; 248. Seventh coil group; 2481. Seventh bend wire; 2482. Seventh coil; 249. Eighth coil group; 2491. Eighth bend wire; 2492. Eighth coil; 250. Ninth coil group; 2501. Ninth bend wire; 2502. Ninth coil; 251. Tenth coil group; 2511. Tenth bend wire; 2512. Tenth coil; 252. Eleventh coil group; 2521. Eleventh bend wire; 2522. Eleventh coil; 253. Twelfth coil group; 2531. Twelfth bend wire;2532, Twelfth coil; 26, Third phase winding; 261, Fifth lead terminal; 262, Sixth lead terminal; 263, Eleventh bridging wire; 264, Twelfth bridging wire; 265, Thirteenth bridging wire; 266, Fourteenth bridging wire; 267, Fifteenth bridging wire; 268, Thirteenth coil group; 2681, Thirteenth bend wire; 2682, Thirteenth coil; 269, Fourteenth coil group; 2691, Fourteenth bend. Broken line; 2692, Fourteenth coil; 270, Fifteenth coil group; 2701, Fifteenth bent line; 2702, Fifteenth coil; 271, Sixteenth coil group; 2711, Sixteenth bent line; 2712, Sixteenth coil; 272, Seventeenth coil group; 2721, Seventeenth bent line; 2722, Seventeenth coil; 273, Eighteenth coil group; 2731, Eighteenth bent line; 2732, Eighteenth coil. Detailed Implementation
[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0048] Please see Figures 1 to 4 As shown, this utility model embodiment discloses a stator winding structure, which is mainly used in motors. The stator winding structure includes a stator core assembly 10 and a stator winding 20. The stator core assembly 10 includes an annular frame and a plurality of winding teeth 11 that are spaced apart and protruding on the outer wall of the annular frame. The winding teeth 11 are spaced apart along the circumferential direction of the annular frame. Any two adjacent winding teeth 11 and part of the outer wall of the annular frame enclose a wire groove. Each winding tooth 11 and each wire groove are alternately distributed along the circumferential outer wall of the annular frame.
[0049] The stator winding 20 is housed in each slot and wound on each winding tooth 11. The stator winding 20 includes several phase windings 21. Each phase winding 21 includes two lead ends 211, several spaced-apart bridging wires 212, and several spaced-apart coil groups 213. The bridging wires 212 span multiple winding teeth 11. The coil groups 213 can be wound on two adjacent winding teeth 11, but two coil groups 213 cannot be wound on the same winding tooth 11 at the same time. The bridging wires 212 and the two lead ends 211 are connected to the corresponding coil groups 213. The coil groups 213 mainly use enameled wire. Each coil group 213 includes two coils 2131 and two ends connected to the two coils 213 respectively. The bent wire 2132 is connected to the two coils 2131, which are respectively wound around the corresponding two winding teeth 11. The coils 2131 are connected to the corresponding bridge wire 212 or lead end 211. The bent wire 2132 is set horizontally and located in the slot. The bent wire 2132 is set close to the top or bottom of the ring frame, instead of the traditional method of oblique or cross-over winding. It does not occupy the winding space. Under any circumstances, it can meet the winding conditions of high slot full rate. It solves the defect of the wire passing in the slot occupying the internal space when the slot is full rate. It allows the enameled wire to fill the slot space. The winding 21 can be wound in one go, reducing the cost of connection process, related equipment and time.
[0050] In this embodiment, the plurality of phase windings 21 include a first phase winding 22, a second phase winding 24, and a third phase winding 26, which can also be referred to as the U-phase winding, the V-phase winding, and the W-phase winding. The first phase winding 22 has a first lead end 221 and a second lead end 222, the second phase winding 24 has a third lead end 241 and a fourth lead end 242, and the third phase winding 26 has a fifth lead end 261 and a sixth lead end 262. The first lead end 221, the third lead end 241, and the fifth lead end 261 all extend and protrude on one side of the stator core assembly 10, and the second lead end 222, the fourth lead end 242, and the sixth lead end 262 all extend and protrude on the other side of the stator core assembly 10. The lead ends 211 in the first phase winding 22, the second phase winding 24, and the third phase winding 26 are all staggered, that is, located in different slots.
[0051] The first phase winding 22 also includes a first bridging wire 223, a second bridging wire 224, a third bridging wire 225, a fourth bridging wire 226, a fifth bridging wire 227, a first coil group 228 connected between the first lead end 221 and the first bridging wire 223, a second coil group 229 connected between the first bridging wire 223 and the second bridging wire 224, a third coil group 230 connected between the second bridging wire 224 and the third bridging wire 225, a fourth coil group 231 connected between the third bridging wire 225 and the fourth bridging wire 226, a fifth coil group 232 connected between the fourth bridging wire 226 and the fifth bridging wire 227, and a sixth coil group 233 connected between the fifth bridging wire 227 and the second lead end 222, so that the first phase winding 22 can be wound in one go without adding other connecting parts or adding connection steps.
[0052] The second phase winding 24 also includes a sixth bridge wire 243, a seventh bridge wire 244, an eighth bridge wire 245, a ninth bridge wire 246, a tenth bridge wire 247, a seventh coil group 248 connected between the third lead end 241 and the sixth bridge wire 243, an eighth coil group 249 connected between the sixth bridge wire 243 and the seventh bridge wire 244, a ninth coil group 250 connected between the seventh bridge wire 244 and the eighth bridge wire 245, a tenth coil group 251 connected between the eighth bridge wire 245 and the ninth bridge wire 246, an eleventh coil group 252 connected between the ninth bridge wire 246 and the tenth bridge wire 247, and a twelfth coil group 253 connected between the tenth bridge wire 247 and the fourth lead end 242, so that the second phase winding 24 can be wound in one go without adding other connecting parts or adding connection steps.
[0053] The third phase winding 26 also includes an eleventh bridge wire 263, a twelfth bridge wire 264, a thirteenth bridge wire 265, a fourteenth bridge wire 266, a fifteenth bridge wire 267, a thirteenth coil group 268 connected between the fifth lead end 261 and the eleventh bridge wire 263, a fourteenth coil group 269 connected between the eleventh bridge wire 263 and the twelfth bridge wire 264, a fifteenth coil group 270 connected between the twelfth bridge wire 264 and the thirteenth bridge wire 265, a sixteenth coil group 271 connected between the thirteenth bridge wire 265 and the fourteenth bridge wire 266, a seventeenth coil group 272 connected between the fourteenth bridge wire 266 and the fifteenth bridge wire 267, and an eighteenth coil group 273 connected between the fifteenth bridge wire 267 and the sixth lead end 262, so that the third phase winding 26 can be wound in one go without adding other connecting parts or adding connection steps.
[0054] The first lead end 221, the third lead end 241, the fifth lead end 261, the second bridging line 224, the fourth bridging line 226, the seventh bridging line 244, the ninth bridging line 246, the twelfth bridging line 264, and the fourteenth bridging line 266 are all located near the ground side of the ring frame. The second lead end 222, the fourth lead end 242, the sixth lead end 262, the first bridging line 223, the third bridging line 225, the fifth bridging line 227, the sixth bridging line 243, the eighth bridging line 245, the tenth bridging line 247, the eleventh bridging line 263, the thirteenth bridging line 265, and the fifteenth bridging line 267 are all located near the top side of the ring frame. Each bridging line 212 is located at the upper or lower end of the ring frame.
[0055] In this embodiment, the number of winding teeth 11 and the number of wire grooves are both thirty-six. Each winding tooth 11 includes a first winding tooth 111, a second winding tooth 112, a third winding tooth 113, a fourth winding tooth 114, a fifth winding tooth 115, a sixth winding tooth 116, a seventh winding tooth 117, an eighth winding tooth 118, a ninth winding tooth 119, a tenth winding tooth 120, an eleventh winding tooth 121, and a twelfth winding tooth 120 arranged sequentially along the circumference. 2. The thirteenth winding tooth 123, the fourteenth winding tooth 124, the fifteenth winding tooth 125, the sixteenth winding tooth 126, the seventeenth winding tooth 127, the eighteenth winding tooth 128, the nineteenth winding tooth 129, the twentieth winding tooth 130, the twenty-first winding tooth 131, the twenty-second winding tooth 132, the twenty-third winding tooth 133, the twenty-fourth winding tooth 134, the twenty-fifth winding tooth 135, the twenty-sixth winding tooth 136, the second Seventeenth winding tooth 137, twenty-eighth winding tooth 138, twenty-ninth winding tooth 139, thirtieth winding tooth 140, thirty-first winding tooth 141, thirty-second winding tooth 142, thirty-third winding tooth 143, thirty-fourth winding tooth 144, thirty-fifth winding tooth 145, and thirty-sixth winding tooth 146; the first coil group 228 is sleeved on the first winding tooth 111 and the second winding tooth 112, and the second coil group 229 is sleeved on the... The seventh winding tooth 117 and the eighth winding tooth 118 are used as winding teeth. The third coil group 230 is used as winding teeth 123 and 124. The fourth coil group 231 is used as winding teeth 129 and 130. The fifth coil group 232 is used as winding teeth 135 and 136. The sixth coil group 233 is used as winding teeth 141 and 142.
[0056] The seventh coil group 248 is fitted onto the fifth winding tooth 115 and the sixth winding tooth 116; the eighth coil group 249 is fitted onto the eleventh winding tooth 121 and the twelfth winding tooth 122; the ninth coil group 250 is fitted onto the seventeenth winding tooth 127 and the eighteenth winding tooth 128; the tenth coil group 251 is fitted onto the twenty-third winding tooth 133 and the twenty-fourth winding tooth 134; the eleventh coil group 252 is fitted onto the twenty-ninth winding tooth 139 and the thirtieth winding tooth 140; the twelfth coil group 253 is fitted onto the thirty-fifth winding tooth 145 and the thirty-sixth winding tooth 146; the thirteenth coil group 268 is fitted onto... On the ninth winding tooth 119 and the tenth winding tooth 120, the fourteenth coil group 269 is sleeved on the fifteenth winding tooth 125 and the sixteenth winding tooth 126, the fifteenth coil group 270 is sleeved on the twenty-first winding tooth 131 and the twenty-second winding tooth 132, the sixteenth coil group 271 is sleeved on the twenty-seventh winding tooth 137 and the twenty-eighth winding tooth 138, the seventeenth coil group 272 is sleeved on the thirty-third winding tooth 143 and the thirty-fourth winding tooth 144, and the eighteenth coil group 273 is sleeved on the third winding tooth 113 and the fourth winding tooth 114, so that coil group 213 is sleeved on adjacent winding teeth 11.
[0057] In this embodiment, the first coil group 228 includes a first bent wire 2281 and two first coils 2282. The two first coils 2282 are respectively mounted on the first winding tooth 111 and the second winding tooth 112. One end of each of the two first coils 2282 is connected to the first lead end 221 and the first bridge wire 223, respectively, and the other end of each of the two first coils 2282 is connected to both ends of the first bent wire 2281. The second coil group 229 includes a second bent wire 2291 and two second coils 2292. The two second coils 2292 are respectively mounted on the seventh winding tooth 117 and the eighth winding tooth 118. One end of each of the two coils 2292 is connected to the first bridging wire 223 and the second bridging wire 224, respectively; the other ends of the two coils 2292 are connected to both ends of the second bent wire 2291, respectively. The third coil group 230 includes a third bent wire 2301 and two third coils 2302. The two third coils 2302 are respectively mounted on the thirteenth winding tooth 123 and the fourteenth winding tooth 124. One end of each of the two third coils 2302 is connected to the second bridging wire 224 and the third bridging wire 225, respectively; the other ends of the two third coils 2302 are connected to both ends of the third bent wire 2301, respectively. The fourth coil group 231 includes... The fifth coil group 232 includes a fourth bend line 2311 and two fourth coils 2312. The two fourth coils 2312 are respectively mounted on the nineteenth winding tooth 129 and the twentieth winding tooth 130. One end of each fourth coil 2312 is connected to the third bridging wire 225 and the fourth bridging wire 226, respectively, and the other end of each fourth coil 2312 is connected to both ends of the fourth bend line 2311. The fifth coil group 232 includes a fifth bend line 2321 and two fifth coils 2322. The two fifth coils 2322 are respectively mounted on the twenty-fifth winding tooth 135 and the twenty-sixth winding tooth 136. One end of each fifth coil 2322 is connected to the two ends of the fourth bend line 2311. The first phase winding 22 is connected to the fourth bridge line 226 and the fifth bridge line 227 respectively, and the other ends of the two fifth coils 2322 are connected to the two ends of the fifth bend line 2321 respectively; the sixth coil group 233 includes the sixth bend line 2331 and two sixth coils 2332. The two sixth coils 2332 are respectively mounted on the thirty-first winding tooth 141 and the thirty-second winding tooth 142. One end of the two sixth coils 2332 is connected to the fifth bridge line 227 and the second lead end 222 respectively, and the other end of the two sixth coils 2332 is connected to the two ends of the sixth bend line 2331 respectively, so as to realize the precise winding of the first phase winding 22.
[0058] The seventh coil group 248 includes a seventh bend wire 2481 and two seventh coils 2482. The two seventh coils 2482 are respectively mounted on the fifth winding tooth 115 and the sixth winding tooth 116. One end of each of the two seventh coils 2482 is connected to the third lead end 241 and the sixth bridge wire 243, respectively, and the other end of each of the two seventh coils 2482 is connected to both ends of the seventh bend wire 2481, respectively. The eighth coil group 249 includes an eighth bend wire 2491 and two eighth coils 2492. The two eighth coils 2492 are respectively mounted on the eleventh winding tooth 121 and the twelfth winding tooth 122. One end of each of the eighteenth coils 2492 is connected to the sixth bridge wire 243 and the seventh bridge wire 244 respectively, and the other ends of the two eighth coils 2492 are connected to the two ends of the eighth bend wire 2491 respectively; the ninth coil group 250 includes the ninth bend wire 2501 and two ninth coils 2502, which are respectively mounted on the seventeenth winding tooth 127 and the eighteenth winding tooth 128. One end of each of the two ninth coils 2502 is connected to the seventh bridge wire 244 and the eighth bridge wire 245 respectively, and the other ends of the two ninth coils 2502 are connected to the two ends of the ninth bend wire 2501 respectively; the tenth coil group 251 includes the tenth bend wire 251. 1. Two tenth coils 2512 are mounted on the twenty-third winding tooth 133 and the twenty-fourth winding tooth 134, respectively. One end of each tenth coil 2512 is connected to the eighth bridging wire 245 and the ninth bridging wire 246, respectively, and the other end of each tenth coil 2512 is connected to both ends of the tenth bend wire 2511, respectively. The eleventh coil group 252 includes the eleventh bend wire 2521 and two eleventh coils 2522, which are mounted on the twenty-ninth winding tooth 139 and the thirtieth winding tooth 140, respectively. One end of each eleventh coil 2522 is connected to the ninth bridging wire 245 and the thirtieth winding tooth 140, respectively. The bridge wire 246 and the tenth bridge wire 247 are connected, and the other ends of the two eleventh coils 2522 are respectively connected to the two ends of the eleventh bend wire 2521; the twelfth coil group 253 includes the twelfth bend wire 2531 and two twelfth coils 2532. The two twelfth coils 2532 are respectively mounted on the thirty-fifth winding tooth 145 and the thirty-sixth winding tooth 146. One end of the two twelfth coils 2532 is respectively connected to the tenth bridge wire 247 and the fourth lead end 242, and the other end of the two twelfth coils 2532 is respectively connected to the two ends of the twelfth bend wire 2531, so as to realize the precise winding of the second phase winding 24.
[0059] In this embodiment, the thirteenth coil group 268 includes a thirteenth bend wire 2681 and two thirteenth coils 2682. The two thirteenth coils 2682 are respectively mounted on the ninth winding tooth 119 and the tenth winding tooth 120. One end of each of the two thirteenth coils 2682 is connected to the fifth lead end 261 and the eleventh bridge wire 263, respectively, and the other end of each of the two thirteenth coils 2682 is connected to both ends of the thirteenth bend wire 2681. The fourteenth coil group 269 includes a fourteenth bend wire 2691 and two fourteenth coils 2692. The two fourteenth coils 2692 are respectively mounted on the fifteenth winding tooth 125 and the sixteenth winding tooth 126. One end of each of the two fourteenth coils 2692 is connected to the eleventh lead end 119 and the eleventh bridge wire 263, respectively. The 12th bridge wire 264 and the 15th bridging wire 263 are connected, and the other ends of the two 14th coils 2692 are respectively connected to the two ends of the 14th bend wire 2691; the 15th coil group 270 includes the 15th bend wire 2701 and two 15th coils 2702, which are respectively mounted on the 21st winding tooth 131 and the 22nd winding tooth 132. One end of the two 15th coils 2702 is respectively connected to the 12th bridge wire 264 and the 13th bridge wire 265, and the other end of the two 15th coils 2702 is respectively connected to the two ends of the 15th bend wire 2701; the 16th coil group 271 includes the 16th bend wire 2711 and two 16th coils 2712, which are respectively connected to the 16th bend wire 2711 and the 16th coil 2712. Coils 2712 are respectively mounted on the twenty-seventh winding tooth 137 and the twenty-eighth winding tooth 138. One end of each of the two sixteenth coils 2712 is connected to the thirteenth bridging wire 265 and the fourteenth bridging wire 266, respectively, and the other end of each of the two sixteenth coils 2712 is connected to both ends of the sixteenth bend wire 2711. The seventeenth coil group 272 includes the seventeenth bend wire 2721 and two seventeenth coils 2722. The two seventeenth coils 2722 are respectively mounted on the thirty-third winding tooth 143 and the thirty-fourth winding tooth 144. One end of each of the two seventeenth coils 2722 is connected to the fourteenth bridging wire 266 and the fifteenth bridging wire 267, respectively, and the other end of each of the two seventeenth coils 2722 is connected to the tenth bridging wire 265 and the fourteenth bridging wire 266, respectively, and the other end of each of the two seventeenth coils 2722 is connected to the tenth bridging wire 266 and the fourteen ...6 and the fourteenth bridging wire 267, respectively, and the other end of each of the two seventeenth coils 2722 The two ends of the seven-bend line 2721 are connected; the eighteenth coil group 273 includes the eighteenth bend line 2731 and two eighteenth coils 2732. The two eighteenth coils 2732 are respectively installed on the third winding tooth 113 and the fourth winding tooth 114. One end of the two eighteenth coils 2732 is connected to the fifteenth bridge line 267 and the sixth lead end 262 respectively, and the other end of the two eighteenth coils 2732 is connected to both ends of the eighteenth bend line 2731 respectively, so as to realize the precise winding of the third phase winding 26. When the wire passes through the slot, the winding conditions of each single tooth are met, that is, the winding conditions are the same whether winding one winding tooth 11 or countless winding teeth 11. There is no defect that the winding space is occupied when the wire passes through the slot.
[0060] In this embodiment, the first bend line 2281, the third bend line 2301, the fifth bend line 2321, the seventh bend line 2481, the ninth bend line 2501, the eleventh bend line 2521, the thirteenth bend line 2681, the fifteenth bend line 2701, and the seventeenth bend line 2721 are all located close to the ground side of the ring frame; the second bend line 2291, the fourth bend line 2311, the sixth bend line 2331, the eighth bend line 2491, the tenth bend line 2511, the twelfth bend line 2531, the fourteenth bend line 2691, and the sixteenth bend line 2721 are all located close to the ground side of the ring frame; Line 2711 and the eighteenth bend line 2731 are both set close to the top side of the ring frame. Each bend line 2132, i.e. the through line, is located at the upper or lower end of the ring frame. The external through lines at both ends of the ring frame are evenly distributed, which can reduce the overlap of too many external through lines in the axial space. This solves the problem that too many external through lines on one side end face are prone to errors, and the more slots there are, the more errors are prone to. It also completely avoids the defect of the through line space occupying space inside the slot. Without adding other materials, it achieves the goal of high slot fullness, and does not add additional materials, connection processes, or equipment.
[0061] The first lead end 221, the third lead end 241 and the fifth lead end 261 are all inlet terminals, and the second lead end 222, the fourth lead end 242 and the sixth lead end 262 are all outlet terminals. Both inlet and outlet terminals are part of the motor stator's inlet and outlet lines, which facilitates electrical connection with external equipment.
[0062] The first lead end 221 is located between the first winding tooth 111 and the second winding tooth 112; the second lead end 222 is located between the thirty-second winding tooth 142 and the thirty-third winding tooth 143; the third lead end 241 is located between the fifth winding tooth 115 and the sixth winding tooth 116; the fourth lead end 242 is located between the thirty-sixth winding tooth 146 and the first winding tooth 111; the fifth lead end 261 is located between the ninth winding tooth 119 and the tenth winding tooth 120; and the sixth lead end 262 is located between the fourth winding tooth 114 and the fifth winding tooth 115. The structure is simple and does not require manual adjustment to the outside, making it easy to connect each lead end 211 to the external circuit. The three-phase winding 21 is wound from the bottom outwards each time, ending when the wires are laid to the outermost edge. The winding space of the motor is very limited, and this winding method can solve the above problems.
[0063] This utility model also discloses an electric motor, including the stator winding structure as described above.
[0064] In summary, in the stator winding structure of this utility model, each phase winding 21 includes two lead ends 211, several bridging wires 212 spanning multiple winding teeth 11, and several coil groups 213 wound on adjacent two winding teeth 11. The bridging wires 212 and the two lead ends 211 are all connected to the corresponding coil groups 213. This eliminates the need for traditional PCB boards or other copper clips and other additional connecting materials, and eliminates the need for additional processes such as soldering or snap-fitting. During the winding process of each phase winding 21, the two lead ends 213 within each coil group 213... The coils 2131 wound on the winding teeth 11 are all provided with bent wires 2132 with wire passing function. The bent wires 2132 are arranged horizontally and located in the wire slot. The bent wires 2132 are located close to the top or bottom of the ring frame, instead of the traditional method of oblique wire passing or cross-over wire passing. This does not occupy the winding space and will not cause insufficient subsequent winding space. Under any circumstances, the winding conditions of high slot fill factor can be met, realizing the adjacent winding tooth winding process with high slot fill factor, which is suitable for widespread promotion.
[0065] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A stator winding structure, characterized in that, include: A stator core assembly, the stator core assembly including an annular frame and a plurality of winding teeth spaced apart and protruding on the outer wall of the annular frame, wherein any two adjacent winding teeth and a portion of the outer wall of the annular frame enclose a wire groove, and each winding tooth and each wire groove are alternately distributed along the circumference of the annular frame; The stator winding is housed in each of the slots and wound on each of the winding teeth. The stator winding includes several phase windings. Each phase winding includes two lead ends, several bridging wires spanning multiple winding teeth, and several coil groups wound on adjacent winding teeth. The bridging wires and the two lead ends are connected to the corresponding coil groups. Each coil group includes two coils and a bent wire connected to the two coils at both ends. The two coils are wound on corresponding two winding teeth. The coils are connected to the corresponding bridging wires or lead ends. The bent wires are arranged laterally and located in the slots, and the bent wires are located near the top or bottom of the ring frame.
2. The stator winding structure according to claim 1, characterized in that, The windings of several phases include a first phase winding, a second phase winding, and a third phase winding. The first phase winding has a first lead end and a second lead end. The second phase winding has a third lead end and a fourth lead end. The third phase winding has a fifth lead end and a sixth lead end. The first lead end, the third lead end, and the fifth lead end all extend and protrude from one side of the stator core assembly. The second lead end, the fourth lead end, and the sixth lead end all extend and protrude from the other side of the stator core assembly.
3. The stator winding structure according to claim 2, characterized in that, The first phase winding further includes a first bridging wire, a second bridging wire, a third bridging wire, a fourth bridging wire, a fifth bridging wire, a first coil group connected between the first lead end and the first bridging wire, a second coil group connected between the first bridging wire and the second bridging wire, a third coil group connected between the second bridging wire and the third bridging wire, a fourth coil group connected between the third bridging wire and the fourth bridging wire, a fifth coil group connected between the fourth bridging wire and the fifth bridging wire, and a sixth coil group connected between the fifth bridging wire and the second lead end. The second phase winding further includes a sixth bridge wire, a seventh bridge wire, an eighth bridge wire, a ninth bridge wire, a tenth bridge wire, a seventh coil group connected between the third lead end and the sixth bridge wire, an eighth coil group connected between the sixth bridge wire and the seventh bridge wire, a ninth coil group connected between the seventh bridge wire and the eighth bridge wire, a tenth coil group connected between the eighth bridge wire and the ninth bridge wire, an eleventh coil group connected between the ninth bridge wire and the tenth bridge wire, and a twelfth coil group connected between the tenth bridge wire and the fourth lead end; The third phase winding further includes an eleventh bridge wire, a twelfth bridge wire, a thirteenth bridge wire, a fourteenth bridge wire, a fifteenth bridge wire, a thirteenth coil group connected between the fifth lead end and the eleventh bridge wire, a fourteenth coil group connected between the eleventh bridge wire and the twelfth bridge wire, a fifteenth coil group connected between the twelfth bridge wire and the thirteenth bridge wire, a sixteenth coil group connected between the thirteenth bridge wire and the fourteenth bridge wire, a seventeenth coil group connected between the fourteenth bridge wire and the fifteenth bridge wire, and an eighteenth coil group connected between the fifteenth bridge wire and the sixth lead end.
4. The stator winding structure according to claim 3, characterized in that, The first lead end, the third lead end, the fifth lead end, the second bridging wire, the fourth bridging wire, the seventh bridging wire, the ninth bridging wire, the twelfth bridging wire, and the fourteenth bridging wire are all located close to the ground side of the ring frame, while the second lead end, the fourth lead end, the sixth lead end, the first bridging wire, the third bridging wire, the fifth bridging wire, the sixth bridging wire, the eighth bridging wire, the tenth bridging wire, the eleventh bridging wire, the thirteenth bridging wire, and the fifteenth bridging wire are all located close to the top side of the ring frame.
5. The stator winding structure according to claim 3, characterized in that, Both the winding teeth and the grooves are provided with thirty-six teeth. Each winding tooth includes a first winding tooth, a second winding tooth, a third winding tooth, a fourth winding tooth, a fifth winding tooth, a sixth winding tooth, a seventh winding tooth, an eighth winding tooth, a ninth winding tooth, a tenth winding tooth, an eleventh winding tooth, a twelfth winding tooth, a thirteenth winding tooth, a fourteenth winding tooth, a fifteenth winding tooth, a sixteenth winding tooth, a seventeenth winding tooth, an eighteenth winding tooth, a nineteenth winding tooth, a twentieth winding tooth, a twenty-first winding tooth, a twenty-second winding tooth, a twenty-third winding tooth, a thirty-fourth winding tooth, a thirty-fifth winding tooth, and a thirty-sixth winding tooth arranged sequentially along the circumference. The first coil group is sleeved on the first winding tooth and the second winding tooth; the second coil group is sleeved on the seventh winding tooth and the eighth winding tooth; the third coil group is sleeved on the thirteenth winding tooth and the fourteenth winding tooth; the fourth coil group is sleeved on the nineteenth winding tooth and the twentieth winding tooth; the fifth coil group is sleeved on the twenty-fifth winding tooth and the twenty-sixth winding tooth; and the sixth coil group is sleeved on the thirty-first winding tooth and the thirty-second winding tooth. The seventh coil group is sleeved on the fifth and sixth winding teeth; the eighth coil group is sleeved on the eleventh and twelfth winding teeth; the ninth coil group is sleeved on the seventeenth and eighteenth winding teeth; the tenth coil group is sleeved on the twenty-third and twenty-fourth winding teeth; the eleventh coil group is sleeved on the twenty-ninth and thirtieth winding teeth; and the twelfth coil group is sleeved on the thirty-fifth and thirty-sixth winding teeth. The thirteenth coil group is sleeved on the ninth and tenth winding teeth, the fourteenth coil group is sleeved on the fifteenth and sixteenth winding teeth, the fifteenth coil group is sleeved on the twenty-first and twenty-second winding teeth, the sixteenth coil group is sleeved on the twenty-seventh and twenty-eighth winding teeth, the seventeenth coil group is sleeved on the thirty-third and thirty-fourth winding teeth, and the eighteenth coil group is sleeved on the third and fourth winding teeth.
6. The stator winding structure according to claim 5, characterized in that, The first coil group includes a first bent wire and two first coils. The two first coils are respectively mounted on the first winding tooth and the second winding tooth. One end of the two first coils is respectively connected to the first lead end and the first bridge wire, and the other end of the two first coils is respectively connected to both ends of the first bent wire. The second coil group includes a second bent wire and two second coils. The two second coils are respectively mounted on the seventh winding tooth and the eighth winding tooth. One end of the two second coils is respectively connected to the first bridge wire and the second bridge wire, and the other end of the two second coils is respectively connected to both ends of the second bent wire. The third coil group includes a third bent wire and two third coils. The two third coils are respectively mounted on the thirteenth winding tooth and the fourteenth winding tooth. One end of the two third coils is respectively connected to the second bridge wire and the third bridge wire, and the other end of the two third coils is respectively connected to both ends of the third bent wire. The fourth coil group includes a fourth bend wire and two fourth coils. The two fourth coils are respectively mounted on the nineteenth winding tooth and the twentieth winding tooth. One end of the two fourth coils is respectively connected to the third bridge wire and the fourth bridge wire, and the other end of the two fourth coils is respectively connected to both ends of the fourth bend wire. The fifth coil group includes a fifth bent wire and two fifth coils. The two fifth coils are respectively mounted on the twenty-fifth winding tooth and the twenty-sixth winding tooth. One end of the two fifth coils is respectively connected to the fourth bridge wire and the fifth bridge wire, and the other end of the two fifth coils is respectively connected to both ends of the fifth bent wire. The sixth coil group includes a sixth bend wire and two sixth coils. The two sixth coils are respectively mounted on the thirty-first winding tooth and the thirty-second winding tooth. One end of the two sixth coils is respectively connected to the fifth bridge wire and the second lead end, and the other end of the two sixth coils is respectively connected to both ends of the sixth bend wire.
7. The stator winding structure according to claim 6, characterized in that, The seventh coil group includes a seventh bent wire and two seventh coils. The two seventh coils are respectively mounted on the fifth winding tooth and the sixth winding tooth. One end of the two seventh coils is respectively connected to the third lead end and the sixth bridge wire, and the other end of the two seventh coils is respectively connected to both ends of the seventh bent wire. The eighth coil group includes an eighth bent wire and two eighth coils. The two eighth coils are respectively mounted on the eleventh winding tooth and the twelfth winding tooth. One end of the two eighth coils is respectively connected to the sixth bridge wire and the seventh bridge wire, and the other end of the two eighth coils is respectively connected to both ends of the eighth bent wire. The ninth coil group includes a ninth bend wire and two ninth coils. The two ninth coils are respectively mounted on the seventeenth winding tooth and the eighteenth winding tooth. One end of the two ninth coils is respectively connected to the seventh bridge wire and the eighth bridge wire, and the other end of the two ninth coils is respectively connected to both ends of the ninth bend wire. The tenth coil group includes a tenth bend wire and two tenth coils. The two tenth coils are respectively mounted on the twenty-third winding tooth and the twenty-fourth winding tooth. One end of the two tenth coils is respectively connected to the eighth bridge wire and the ninth bridge wire, and the other end of the two tenth coils is respectively connected to both ends of the tenth bend wire. The eleventh coil group includes an eleventh bend wire and two eleventh coils. The two eleventh coils are respectively mounted on the twenty-ninth winding tooth and the thirtieth winding tooth. One end of the two eleventh coils is respectively connected to the ninth bridge wire and the tenth bridge wire, and the other end of the two eleventh coils is respectively connected to both ends of the eleventh bend wire. The twelfth coil group includes a twelfth bend wire and two twelfth coils. The two twelfth coils are respectively mounted on the thirty-fifth winding tooth and the thirty-sixth winding tooth. One end of the two twelfth coils is respectively connected to the tenth bridge wire and the fourth lead end, and the other end of the two twelfth coils is respectively connected to both ends of the twelfth bend wire.
8. The stator winding structure according to claim 7, characterized in that, The thirteenth coil group includes a thirteenth bend wire and two thirteenth coils. The two thirteenth coils are respectively mounted on the ninth winding tooth and the tenth winding tooth. One end of the two thirteenth coils is respectively connected to the fifth lead end and the eleventh bridge wire, and the other end of the two thirteenth coils is respectively connected to both ends of the thirteenth bend wire. The fourteenth coil group includes a fourteenth bend wire and two fourteenth coils. The two fourteenth coils are respectively mounted on the fifteenth winding tooth and the sixteenth winding tooth. One end of the two fourteenth coils is respectively connected to the eleventh bridge wire and the twelfth bridge wire, and the other end of the two fourteenth coils is respectively connected to both ends of the fourteenth bend wire. The fifteenth coil group includes a fifteenth bend wire and two fifteenth coils. The two fifteenth coils are respectively mounted on the twenty-first winding tooth and the twenty-second winding tooth. One end of the two fifteenth coils is respectively connected to the twelfth bridge wire and the thirteenth bridge wire, and the other end of the two fifteenth coils is respectively connected to both ends of the fifteenth bend wire. The sixteenth coil group includes a sixteenth bend wire and two sixteenth coils. The two sixteenth coils are respectively mounted on the twenty-seventh winding tooth and the twenty-eighth winding tooth. One end of the two sixteenth coils is respectively connected to the thirteenth bridge wire and the fourteenth bridge wire, and the other end of the two sixteenth coils is respectively connected to both ends of the sixteenth bend wire. The seventeenth coil group includes a seventeenth bend and two seventeenth coils. The two seventeenth coils are respectively mounted on the thirty-third winding tooth and the thirty-fourth winding tooth. One end of the two seventeenth coils is respectively connected to the fourteenth bridging wire and the fifteenth bridging wire, and the other end of the two seventeenth coils is respectively connected to both ends of the seventeenth bend. The eighteenth coil group includes an eighteenth bend and two eighteenth coils. The two eighteenth coils are respectively mounted on the third winding tooth and the fourth winding tooth. One end of the two eighteenth coils is respectively connected to the fifteenth bridge wire and the sixth lead end, and the other end of the two eighteenth coils is respectively connected to both ends of the eighteenth bend.
9. The stator winding structure according to claim 8, characterized in that, The first bend line, the third bend line, the fifth bend line, the seventh bend line, the ninth bend line, the eleventh bend line, the thirteenth bend line, the fifteenth bend line, and the seventeenth bend line are all located close to the ground side of the ring frame; The second, fourth, sixth, eighth, tenth, twelfth, fourteenth, sixteenth, and eighteenth bend lines are all located close to the top side of the ring frame.
10. An electric motor, characterized in that, Including the stator winding structure as described in any one of claims 1-9.