CN104901447A - Motor stator and coiling structure thereof - Google Patents

Abstract

A motor stator includes an iron core and multiple sets of winding structures. A plurality of winding slots are formed on the iron core. The winding structure includes a first wire and a second wire, the first wire includes a first arc segment, a first pin and a second pin, and the second wire includes a second arc segment, a third pin and a fourth pin. Both the first pin and the second pin include a main body, a connecting portion and a protruding portion protruding from two ends of the main body and extending toward opposite sides. Both the third pin and the fourth pin include a main body, a connecting portion and a protruding portion protruding from both ends of the main body and extending toward the same side. Each winding groove sequentially accommodates the main body of the fourth pin, the main body of the second pin, the main body of the third pin and the main body of the first pin from one end close to the inner surface of the iron core toward the outer surface. The first arc segments and the second arc segments of the multi-group winding structure are alternately arranged along the circumferential direction of the iron core. The present invention also provides the winding structure adopted by the motor stator.

Description

Motor stator and its winding structure

technical field

The invention relates to a motor, in particular to a motor stator and its winding structure.

Background technique

The stator of the motor includes an iron core and multiple groups of coils. Multiple wire slots are formed on the iron core, and multiple sets of coils are wound in the multiple wire slots. The existing stator generally adopts a plurality of special-shaped embedding wire groups to be wound in the embedding slots to form multiple sets of coils. Each special-shaped rule group includes an inner special-shaped rule and an outer special-shaped rule. The structures of the inner and outer special-shaped rule are roughly the same, and both include an arc segment and a main body symmetrically formed at both ends of the arc segment.

Existing winding methods include lap winding and wave winding. After lapping and winding, the arc segment of the outer profiled wire wraps on the arc segment of the inner profiled wire, which increases the length of each coil end (Endturn), thereby increasing the copper loss of the coil and reducing the power density of the motor. After waveform winding, the inner and outer special-shaped embedding wires of each group of coils are connected in a waveform, which reduces the output torque of the motor.

Contents of the invention

In view of the above situation, it is necessary to provide a motor stator with high power density and high output torque and its winding structure.

A motor stator, which includes an iron core and multiple sets of winding structures, the iron core is hollow cylindrical, the inner surface of the iron core is recessed to form a plurality of winding slots passing through its two ends, the plurality of winding slots The circumferential direction around the iron core is evenly spaced, and a winding rod is formed between every two adjacent winding slots. Each group of winding structures includes inserting into the corresponding two winding slots and winding around the adjacent multiple A first wire and a second wire on a winding rod, the first wire includes a first arc segment and a first pin and a second pin protruding from both ends of the first arc segment, the second pin The wire includes a second arc segment and third pins and fourth pins that are bent and protruding from both ends of the second arc segment. Each of the first pin and the second pin includes a main body and a connecting portion and a protruding portion that are bent and protruded from opposite ends of the corresponding main body and extend toward opposite sides. The connecting portions of the first pin and the second pin are respectively The two ends of the first arc section are connected, and the main body of the first pin is parallel to the main body of the second pin; both the third pin and the fourth pin include a main body and two opposite sides bent and protruding from the corresponding main body. The connecting portion and the protruding portion extending toward the same side, the connecting portions of the third pin and the fourth pin are respectively connected to the two ends of the second arc segment, and the main body of the three pins is parallel to the fourth pin the main body of the first prong, the second prong, the third prong and the fourth prong have the same length, and the protrusions of the first prong, the second prong, the third prong and the fourth prong The lengths of the first pin, the second pin, the third pin and the fourth pin are not equal in length, and the total length of the first wire is equal to the total length of the second wire ; In each winding groove, the main body of the fourth pin, the main body of the second pin, the main body of the third pin and the first pin are sequentially accommodated in the direction from the end close to the inner surface of the iron core toward the outer surface The main body, each first arc segment is located above the corresponding winding groove, and each second arc segment is located above the corresponding winding rod, so that the first arc segments and the multiple sets of winding structures The second arc segments are alternately arranged along the circumferential direction of the iron core, and the protruding parts of each fourth pin, each second pin, each third pin and each first pin are sequentially connected two by two so that the Multiple sets of winding structures form multiple sets of coils.

A wire winding structure, which includes a first wire and a second wire, the first wire includes a first arc segment and a first prong and a second prong formed at both ends of the first arc segment, the The second wire includes a second arc segment and third pins and fourth pins that are bent and protruded from two ends of the second arc segment. Both the first pin and the second pin include a main body and a connecting portion and a protruding portion that are bent and protruded from opposite ends of the corresponding main body and extend toward opposite sides, the connecting portion of the first pin and the second pin The two ends of the first arc section are respectively connected, and the main body of the first pin is parallel to the main body of the second pin; both the third pin and the fourth pin include a main body and opposite sides bent and protruding from the corresponding main body. The connecting part and the protruding part extending toward the same side at both ends, the connecting parts of the third pin and the fourth pin are respectively connected to the two ends of the second arc segment, and the main body of the three pins is parallel to the fourth pin The body of the pin; the lengths of the bodies of the first pin, the second pin, the third pin, and the fourth pin are equal, and the protrusions of the first pin, the second pin, the third pin, and the fourth pin The lengths of the extension parts are equal, the lengths of the connecting parts of the first pin, the second pin, the third pin and the fourth pin are not equal, and the total length of the first wire is the same as the total length of the second wire equal.

In the motor stator of the present invention, the first wire and the second wire in the winding structure are respectively designed as an asymmetric U-shaped structure, so that after winding, the first arc segment and the second arc segment are respectively positioned at the corresponding winding wires. The slots and the corresponding winding rods are arranged alternately along the circumferential direction of the iron core, thereby avoiding the overlapping of the first arc segment and the second arc segment, and reducing the copper loss of the coil. In addition, since the plurality of first wires and the plurality of second wires of each group of coils are alternately connected in sequence, the coils extend along the circumferential direction of the motor stator, thereby increasing the output torque of the motor.

Description of drawings

Fig. 1 is a perspective view of a motor stator according to an embodiment of the present invention.

Fig. 2 is a perspective view of an iron core according to an embodiment of the present invention.

Fig. 3 is a top view of a single winding slot according to an embodiment of the present invention.

FIG. 4 is a perspective view of a winding structure according to an embodiment of the present invention.

Fig. 5 is a partial perspective view of the stator of the motor shown in Fig. 1 .

Fig. 6 is a top view of the motor stator shown in Fig. 5 .

Fig. 7 is a perspective view of the stator of the motor shown in Fig. 5 from another perspective.

Fig. 8 is a top view of the motor stator shown in Fig. 7 .

Description of main component symbols

motor stator 100 iron core 20 The inner surface twenty one The outer surface twenty two upper side twenty three lower side twenty four Winding groove 25 opening 251 bottom 253 first paragraph 254 second paragraph 255 third paragraph 256 fourth paragraph 257 winding rod 26 winding structure 40 first lead 42 first arc segment 421 first pin 423 main body 4231, 4251, 4431, 4451 protrusion 4235, 4255, 4435, 4455 welding part 4237, 4257, 4437, 4457 second pin 425 second wire 44 second arc segment 441 third pin 443 fourth pin 445 Coil 60

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

Referring to FIG. 1 , a motor stator 100 according to an embodiment of the present invention includes an iron core 20 and multiple sets of winding structures 40 .

Please refer to FIG. 2 and FIG. 3 together. The iron core 20 is substantially hollow cylindrical, and includes an inner surface 21 , an outer surface 22 , and an upper side 23 and a lower side 24 connecting the inner surface 21 and the outer surface 22 . The iron core 20 is recessed from the inner surface 21 toward the outer surface 22 to form a plurality of winding slots 25 . A plurality of winding slots 25 are evenly spaced along the circumferential direction of the iron core 20 . Each winding slot 25 passes through the upper side 23 and the lower side 24 . Each winding slot 25 has an opposite opening 251 and a bottom 253 communicating with the opening 251. The opening 251 is an opening adjacent to the inner surface 21 of the iron core 20, and the bottom 253 is an end near the outer surface 22. As shown in Figure 3, each winding slot 25 is divided into a first segment 254, a second segment 255, a third segment 256, and a fourth segment 257 arranged in sequence in the direction of the opening 251 toward the bottom 253, and each segment of space The sizes are approximately equal for inserting four wires arranged side by side along its length direction in each winding slot 25 . A winding rod 26 is formed between every two adjacent winding slots 25 . In this embodiment, the numbers of winding slots 25 , winding rods 26 and winding structures 40 are equal, all being 96 pieces. It can be understood that the number of winding grooves 25 and winding rods 26 can also be designed according to actual needs.

Please also refer to FIG. 4 , each winding structure 40 includes a first wire 42 and a second wire 44 inserted into two corresponding winding grooves 25 and wound on a plurality of adjacent winding rods 26 . The first wire 42 is substantially an asymmetric U-shaped structure, which includes a first arc segment 421 and a first prong 423 and a second prong 425 formed at two ends of the first arc segment 421 . The first prongs 423 and the second prongs 425 are formed by bending and protruding toward opposite sides of the first arc section 421 respectively, and the first prongs 423 and the second prongs 425 are located on two different planes. The first pin 423 includes a main body 4231 , connecting portions 4233 and protruding portions 4235 formed at two ends of the main body 4231 . The main body 4231 is a bar that can extend into the winding slot 25 . The connecting portion 4233 connects the main body 4231 and the first arc segment 421 , and forms a preset obtuse angle when intersecting the main body 4231 . The protruding portion 4235 protrudes toward a side away from the connecting portion 4233 and intersects with the main body 4231 to form a predetermined obtuse angle. A welding portion 4237 is formed on an end of the protruding portion 4235 away from the main body 4231 . In this embodiment, the preset obtuse angles formed by the intersection of the connecting portion 4233 and the protruding portion 4235 with the main body 4231 are equal. It can be understood that the preset obtuse angles formed by the intersection of the connecting portion 4233 and the protruding portion 4235 with the main body 4231 may also be unequal.

The structure of the second pin 425 is substantially the same as that of the first pin 423 , including a main body 4251 , a connecting portion 4253 , a protruding portion 4255 and a welding portion 4257 . The main body 4251 of the second pin 425 is parallel to the main body 4231 of the first pin 423 . The connecting portion 4253 connects the main body 4251 and the first arc segment 421 , and the included angle between the connecting portion 4251 and the main body 4251 is equal to the preset obtuse angle between the connecting portion 4233 of the first pin 423 and the main body 4231 . The included angle between the protruding portion 4255 and the main body 4251 is also equal to the preset obtuse angle between the protruding portion 4235 of the first pin 423 and the main body 4231 . It can be understood that when the preset obtuse angle formed by the intersection of the connecting portion 4233 and the protruding portion 4235 of the first pin 423 with the main body 4231 is not equal, as long as the angle between the connecting portion 4253 of the second pin 425 and the main body 4251 is the same as that of the first pin The preset obtuse angle between the connection part 4233 of 423 and the main body 4231 is equal, and the included angle between the protruding part 4255 of the second pin 425 and the main body 4251 is equal to the preset obtuse angle between the protruding part 4235 of the first pin 423 and the main body 4231 That's it.

In this embodiment, the length of the main body 4251 of the second pin 425 is equal to the length of the main body 4231 of the first pin 423 , the protruding portion 4255 of the second pin 425 is equal to the length of the protruding portion 4235 of the first pin 423 , and the length of the protruding portion 4235 of the first pin 423 is equal. The length of the welding part 4257 of the second pin 425 is equal to the length of the welding part 4237 of the first pin 423, and the length of the connecting part 4253 of the second pin 425 is longer than the length of the connecting part 4233 of the first pin 423, so that the second pin The total length of 425 is longer than the total length of the first pin 423 , even if the first wire 42 forms an asymmetrical U structure. It can be understood that the total length of the second pin 425 can also be shorter than the total length of the first pin 423, even if the length of the connecting portion 4253 of the second pin 425 is shorter than the length of the connecting portion 4233 of the first pin 423, as long as the first pin It is sufficient that the wire 42 forms an asymmetric U structure.

The structure of the second wire 44 is substantially the same as that of the first wire 42 , and includes a second arc segment 441 and third pins 443 and fourth pins 445 formed at two ends of the second arc segment 441 . The arc and length of the second arc section 441 are respectively the same as the arc and length of the first arc section 421 of the first wire 42 . The third prongs 443 and the fourth prongs 445 are formed by bending and protruding toward opposite sides of the second arc section 441 respectively, and the third prongs 443 and the fourth prongs 445 are located on different planes. The third pin 443 includes a main body 4431 , a connecting portion 4433 , a protruding portion 4435 and a welding portion 4437 . The protruding portion 4435 and the connecting portion 4433 protrude from opposite ends of the main body 4431 toward the same side respectively, and respectively form a preset obtuse angle. The fourth pin 445 includes a main body 4451 , a connecting portion 4453 , a protruding portion 4455 and a welding portion 4457 . The protruding portion 4455 and the connecting portion 4453 protrude from opposite ends of the main body 4451 toward the same side, and respectively form a predetermined obtuse angle.

In this embodiment, the lengths of the main body 4431 and 4451 of the second lead 44 are equal to the length of the main body 4231 of the first lead 42 , and the lengths of the protruding parts 4435 and 4455 of the second lead 44 are both the same as the length of the first lead 42 . The extension portion 4235 has the same length, and the lengths of the welding portions 4437 and 4457 of the second wire 44 are both equal to the length of the welding portion 4237 of the first wire 42 . The length of the connecting portion 4433 of the third pin 443 of the second wire 44 is shorter than the length of the connecting portion 4253 of the second pin 425 of the first wire 42, that is, the length of the third pin 443 of the second wire 44 is shorter than that of the first wire The length of the second pin 425 of 42; the length of the connecting portion 4453 of the fourth pin 445 of the second lead 44 is longer than the length of the connecting portion 4233 of the first pin 423 of the first lead 42, that is, the fourth pin of the second lead 44 The length of 445 is longer than the length of the first pin 423 of the first wire 42 ; moreover, the total length of the second wire 44 is equal to the total length of the first wire 42 . The preset obtuse angle between the connecting portion 4433, 4453 of the second wire 44 and the corresponding body 4431, 4451 is equal to the preset obtuse angle between the connecting portion 4233, 4253 of the first wire 42 and the corresponding body 4231, 4251, the second wire 44 The predetermined obtuse angle between the protruding portion 4435 , 4455 of the first lead 42 and the corresponding main body 4431 , 4451 is equal to the predetermined obtuse angle between the protruding portion 4235 , 4255 of the first wire 42 and the corresponding main body 4231 , 4251 .

It should be noted that, in this embodiment, for the convenience of description, the first, seventh, thirteenth, nineteenth, twenty-fifth, thirty-first, and thirty-seventh , the 43rd, the 49th, the 55th, the 61st, the 67th, the 73rd, the 79th, the 85th and the serial number of the 91st winding groove 25.

Please refer to Fig. 3, Fig. 4, Fig. 5 and Fig. 6 together. When winding, at first, insert the first pin 423 of the first wire 42 in the first winding structure 40 into the first pin 423 of the first winding slot 25. Four sections 257, at this time, the main body 4231 is accommodated in the fourth section 257 of the first winding slot 25, the connecting portion 4233 protrudes from the upper side 23 of the iron core 20 and spans the two winding rods 26, and The first arc section 421 of the first wire 42 is located above the third winding slot 25 and extends from the fourth section 257 to the second section 255; secondly, the second pin 425 is inserted across the four winding rods 26 The second segment 255 of the seventh winding groove 25, at this time, the connecting portion 4253 is located on the four winding rods 26, and the main body 4251 is accommodated in the second segment 255 of the seventh winding groove 25; again, the first The third pin 443 of the second wire 44 of one winding structure 40 is inserted into the third section 256 of the first winding groove 25, at this time, the main body 4431 is accommodated in the third section 256 of the first winding groove 25, The connecting portion 4433 protrudes from the upper side 23 of the iron core 20 and spans the three winding rods 26 and is located below the first arc segment 421 of the first wire 42 , and the second arc segment 441 of the second wire 44 Located above the fourth winding rod 26 and extending from the third section 256 to the first section 254 and below the connecting portion 4253 of the first wire 42; finally, the fourth pin 445 spans the two winding rods 26 And insert the first section 254 of the seventh winding slot 25 , at this time, the connecting part 4453 is located on the two winding rods 26 , and the main body 4451 is accommodated in the first section 254 of the seventh winding slot 25 .

Please refer to FIG. 7 and FIG. 8 together. The protruding part 4235 of the first pin 423 of the first wire 42 protrudes from the lower side 24 of the iron core 20 and spans the three winding rods 26, so that the welding part 4237 is located Below the fourth segment 257 of the 94th winding slot 25; the protruding part 4255 of the second pin 425 of the first wire 42 spans the three winding rods 26, so that the welding part 4257 is located in the 10th winding slot 25 Below the second section 255 of the second wire 44; the protruding part 4435 of the third pin 443 of the second wire 44 spans the three winding rods 26, so that the welding part 4437 is located under the third section 256 of the fourth winding slot 25 The protruding portion 4455 of the fourth pin 445 of the second wire 44 spans the three winding rods 26 , so that the welding portion 4457 is located below the first section 254 of the fourth winding slot 25 .

Please refer to FIGS. 5 to 8 together. According to the winding method of the first winding structure 40 above, the second and third winding structures 40 are respectively inserted into the iron core 20 . The first pin 423 of the first wire 42 of the second winding structure 40 is inserted into the fourth segment 257 of the seventh winding slot 25, and its welding part 4237 is located in the fourth segment 257 of the fourth winding slot 25 below; its second pin 425 is inserted into the second section 255 of the 13th winding slot 25, and its welding part 4257 is located below the second section 255 of the 16th winding slot 25; the second winding structure The third pin 443 of the second wire 44 of 40 is inserted into the third section 256 of the seventh winding groove 25, and its welding part 4437 is located below the third section 256 of the tenth winding groove 25; its fourth The pin 445 is inserted into the first section 254 of the thirteenth winding slot 25 , and its soldering portion 4457 is located below the first section 254 of the tenth winding slot 25 .

The first pin 423 of the first wire 42 of the third winding structure 40 is inserted into the fourth section 257 of the thirteenth winding slot 25, and its welding part 4237 is located in the fourth section 257 of the tenth winding slot 25 below; its second pin 425 is inserted into the second section 255 of the 19th winding slot 25, and its welding part 4257 is located below the second section 255 of the 22nd winding slot 25; the third winding structure The third pin 443 of the second wire 44 of 40 is inserted into the third section 256 of the 13th wire winding slot 25, and its welding part 4437 is located below the third section 256 of the 16th wire winding slot 25; The pin 445 is inserted into the first section 254 of the 19th wire winding slot 25 , and its soldering portion 4457 is located below the first section 254 of the 16th wire winding slot 25 .

At this time, the welding portion 4257 of the first wire 42 of the first winding structure 40 is located below the second section 255 of the tenth winding groove 25, and the welding portion 4257 of the second wire 44 of the second winding structure 40 4437 and 4457 are respectively located below the third section 256 of the tenth winding slot 25 and below the first section 254, and the welding part 4237 of the first wire 42 of the third winding structure 40 is located in the tenth winding slot 25 below the fourth paragraph 257. Weld the welding part 4457 below the first section 254 of the tenth winding slot 25 with the welding part 4257 below the second section 255 of the tenth winding slot 25, so as to conduct the first winding The first wire 42 of the wire structure 40 and the second wire 44 of the third winding structure 40; and then the welding part 4437 located under the third section 256 of the tenth winding slot 25 and the tenth winding The welding portion 4237 below the fourth segment 257 of the slot 25 is welded together, so as to conduct the second wire 44 of the second winding structure 40 and the first wire 42 of the third winding structure 40 . According to the above connection method, the first wires 42 and the second wires 44 of the 16 sets of winding structures 40 are alternately connected in sequence, thereby forming two coils 60 . Since the first wires 42 and the second wires 44 in the multi-group winding structure 40 are connected alternately in sequence, the coil 60 extends along the circumferential direction of the motor stator 100 , thereby avoiding the loss of the output torque of the motor during waveform winding.

It can be understood that the number of winding structures 40 forming the coil 60 depends on the number of winding slots 25, if the number of winding slots 25 is W, then the number of the first wires 42 and the second winding structures of W/6 Two sets of coils 60 can be formed after the two wires 44 are connected alternately in sequence.

It can be seen from the above winding method that each winding groove 25 accommodates the main body 4451 of the fourth pin 445 of the second wire 44 and the main body 4251 of the second pin 425 of the first wire 42 arranged in sequence from the opening 251 toward the bottom 253 , the main body 4431 of the third pin 443 of the second lead 44 and the main body 4231 of the first pin 423 of the first lead 42; The first arc section 421 of each second wire 44 is located above the corresponding winding slot 25, and the second arc section 441 of each second wire 44 is located above the corresponding winding rod 26. Therefore, every two adjacent winding slots 25 The first arc section 421 and the second arc section 441 with the same radian are arranged above the winding rod 26, that is, the first arc section 421 and the second arc section 441 in the winding structure 40 are arranged on the core 20. Alternately arranged above the upper side 23 of the iron core 20 along the circumferential direction of the iron core 20, avoiding the overlapping of the first arc segment 421 and the second arc segment 441, thereby reducing the distance between the first arc segment 421 and the second arc segment 441 length, reducing copper loss and increasing the power density of the motor.

In the motor stator 100 of this embodiment, the first wire 42 and the second wire 44 in the winding structure 40 are respectively designed as an asymmetric U-shaped structure, so that the first arc segment 421 and the first arc section 421 of the first wire 42 after winding are The second arc section 441 of the second wire 44 is located on the corresponding winding groove 25 and the corresponding winding rod 26 respectively, and is arranged alternately along the circumferential direction of the iron core 20, thereby avoiding the first arc section 421 and the second The arc segments 441 overlap to reduce the copper loss of the coil. In addition, since the plurality of first wires 42 and the plurality of second wires 44 are alternately connected sequentially, the coil 60 extends along the circumferential direction of the motor stator 100 , thereby increasing the output torque of the motor.

It can be understood that the number of winding rods 26 spanned by the two prongs of each first wire 42 and each second wire 44 can be designed according to actual needs. The welding parts 4237 , 4257 , 4437 , 4457 can be omitted, and the coil 60 can be formed by directly welding the protruding parts 4235 , 4255 , 4435 , 4455 of adjacent first wires 42 and second wires 44 .

In addition, for those skilled in the art, various other corresponding changes and modifications can be made according to the technical concept of the present invention, and all these changes and modifications should belong to the protection scope of the claims of the present invention.

Claims (9)

1. a motor stator, it comprises iron core and organizes winding structure more, this iron core is hollow columnar, this iron core is the surperficial recessed multiple winding slots being formed with its two ends through in the inner, the plurality of winding slot is arranged around the circumferencial direction uniform intervals of this iron core, and be formed with wire winding pole between two often adjacent winding slots, often organize winding structure to comprise and inserting in corresponding two winding slots and the first wire be around on adjacent multiple wire winding poles and the second wire, this first wire comprises the first segmental arc and bending protrudes out the first pin and the second pin that are formed at these the first segmental arc two ends, this second wire comprises the second segmental arc and bending protrudes out the 3rd pin and the four-limbed being formed at these the second segmental arc two ends, it is characterized in that: this first pin and this second pin include main body and bending and convexedly stretch in the opposite end of corresponding main body and the connecting portion extended towards relative both sides and convex extension part, this first pin is connected the two ends of this first segmental arc respectively with the connecting portion of the second pin, and the body parallel of this first pin is in the main body of this second pin, 3rd pin and this four-limbed include main body and bending and convexedly stretch in the opposite end of corresponding main body and the connecting portion extended towards homonymy and convex extension part, 3rd pin and the connecting portion of four-limbed are connected the two ends of this second segmental arc respectively, and the body parallel of this three pin is in the main body of this four-limbed, the length of the main body of this first pin, this second pin, the 3rd pin and this four-limbed is equal, the length of the convex extension part of this first pin, this second pin, the 3rd pin and this four-limbed is equal, the length of the connecting portion of this first pin, this second pin, the 3rd pin and this four-limbed is all unequal, and the total length of this first wire is equal with the total length of this second wire, wherein, in each winding slot, from the one end near this iron core inner surface, the direction on surface contains the main body of this four-limbed successively toward the outside, the main body of this second pin, the main body of the 3rd pin and the main body of this first pin, each first segmental arc is positioned at the top of corresponding winding slot, each second segmental arc is positioned at the top of corresponding wire winding pole, be alternately arranged along the circumferencial direction of this iron core to make the first segmental arc of this many groups winding structure and the second segmental arc, each four-limbed, each second pin, the convex extension part of each 3rd pin and each first pin connects that this many groups winding structure is formed successively between two and organizes coil more.

2. motor stator as claimed in claim 1, is characterized in that: radian and the length of the radian of this first segmental arc and length and this second segmental arc are equal.

3. motor stator as claimed in claim 1, it is characterized in that: the connecting portion of the connecting portion of this first pin, the connecting portion of this second pin, the 3rd pin and the connecting portion default obtuse angle that shape crossing with corresponding main body is equal at angle respectively of this four-limbed, the convex extension part of the convex extension part of this first pin, the convex extension part of this second pin, the 3rd pin and another default obtuse angle that shape crossing with corresponding main body is equal at angle respectively, convex extension part of this four-limbed.

4. winding structure as claimed in claim 3, is characterized in that: the default obtuse angle that each connecting portion and corresponding main body are formed equals the default obtuse angle that each convex extension part is formed with corresponding main body.

5. motor stator as claimed in claim 1, it is characterized in that: this iron core comprises the inner surface and outer surface that are oppositely arranged, and the upper side of be connected this inner surface and this outer surface and downside, each winding slot is from the inner surface surperficial recessed formation toward the outside of this iron core, and run through this upper side and downside, each winding slot comprises the peristome be oppositely arranged and the bottom be communicated with this peristome, and each winding slot its peristome towards it bottom direction on be divided into the first paragraph be arranged in order, second segment, 3rd section and the 4th section, the main body of this four-limbed is contained in this first paragraph, the main body of this second pin is contained in this second segment, the main body of the 3rd pin is contained in the 3rd section, the main body of this first pin is contained in the 4th section.

6. motor stator as claimed in claim 5, is characterized in that: this peristome is the opening of this inner surface contiguous, is the end on this surface contiguous bottom this.

7. motor stator as claimed in claim 5, it is characterized in that: each convex extension part is formed with weld part away from one end of corresponding main body, the convex extension part of this first pin to stretch out in outside this downside and makes its welding position in the below of the 4th section, the convex extension part of this second pin to stretch out in outside this downside and makes its welding position in the below of this second segment, the convex extension part of the 3rd pin to stretch out in outside this downside and makes its welding position in the below of the 3rd section, the convex extension part of this four-limbed to stretch out in outside this downside and makes its welding position in the below of this first paragraph, four weld parts below each winding slot connect successively between two, alternately be connected successively to make the first wire of this many groups winding structure and the second wire to form this many groups coil.

8. motor stator as claimed in claim 1, it is characterized in that: the quantity of this winding slot is 96, part winding structure inserts in corresponding 16 winding slots, and the first wire of this part winding structure and the second wire are alternately connected to form two groups of these coils successively.

9. a winding structure, it comprises the first wire and the second wire, this first wire comprises the first segmental arc and bending protrudes out the first pin and the second pin that are formed at these the first segmental arc two ends, this second wire comprises the second segmental arc and bending protrudes out the 3rd pin and the four-limbed being formed at these the second segmental arc two ends, it is characterized in that: this first pin and this second pin include main body and bending and convexedly stretch in the opposite end of corresponding main body and the connecting portion extended towards relative both sides and convex extension part, this first pin is connected the two ends of this first segmental arc respectively with the connecting portion of this second pin, and the body parallel of this first pin is in the main body of this second pin, 3rd pin and this four-limbed include main body and bending and convexedly stretch in the opposite end of corresponding main body and the connecting portion extended towards homonymy and convex extension part, 3rd pin and the connecting portion of this four-limbed are connected the two ends of this second segmental arc respectively, and the body parallel of this three pin is in the main body of this four-limbed, the length of the main body of this first pin, this second pin, the 3rd pin and this four-limbed is equal, the length of the convex extension part of this first pin, this second pin, the 3rd pin and this four-limbed is equal, the length of the connecting portion of this first pin, this second pin, the 3rd pin and this four-limbed is all unequal, and the total length of this first wire is equal with the total length of this second wire.