CN203562851U - Stator with concentric winding - Google Patents

Abstract

The utility model provides a concentric winding stator, which comprises a stator iron core and a coil winding, wherein the teeth of the stator iron core form a detachable connection with the yoke, the yoke is located on the outer periphery of the teeth, and the middle of the teeth forms a There are round holes; the tooth part includes several straight teeth and curved teeth arranged in a ring shape, and winding grooves are formed between the teeth; among them, there are more than two curved teeth pointing to the same direction between two adjacent straight teeth , the curved teeth on either side of each straight tooth point in opposite directions. The utility model optimizes the tooth shape of the existing stator core, that is, optimizes the size and structure of the winding slot, uses the shape of the teeth and the arrangement order of the teeth to determine the position of the winding, and improves the utilization rate of the slot area of the winding slot. Reduce the difficulty of winding, reduce the length of the coil conductor, reduce the end loss of the motor coil, improve the life and reliability of the motor, reduce the cost of the motor, make the design more reasonable, improve the performance of the motor, and have a high degree of automation .

Description

A concentric winding stator

technical field

The utility model relates to a stator, in particular to a stator with concentric windings.

Background technique

The motor is widely used in various electrical equipment in industrial production and life. The existing motor has a stator and a rotor. The rotor shaft is installed in the rotor and rotates with the rotation of the rotor, thereby outputting power.

Referring to FIG. 1 , some existing motors have a casing composed of end covers 11 and 12 , a stator 15 and a rotor 18 are installed in the casing, and the stator 15 has a stator core 16 and a coil 17 wound on the stator core 16 . The rotor 18 is installed in the stator 15 and is rotatable relative to the stator 15 . The rotor shaft 19 is installed in the rotor 18 and has an interference fit with the rotor 18 . The rotor shaft 19 rotates driven by the rotor 18 to output power outward.

The stator core 16 is usually formed by laminating a plurality of stator punches of the same shape. Referring to FIG. 2 , the stator punch 20 is stamped from a silicon steel sheet, which is roughly in the shape of a ring and has a yoke 21 located on the outer periphery. , and the yoke 21 is annular. The stator punch 20 is also provided with a plurality of teeth 22 extending from the yoke 21 to the middle of the stator punch 20 along the radial direction of the stator punch 20, a winding slot 23 is formed between two adjacent teeth 22, and the coil A winding is wound on the tooth 22 . Moreover, a hollow inner hole 24 is provided in the middle of the stator punching sheet 20. After multiple stator punching sheets 20 are stacked to form the stator core 16, the inner hole 24 of the stator punching sheet 20 forms a rotor hole, and the rotor is installed in the rotor hole. Inside.

The traditional motor stator winding form is shown in Figure 3. When embedding or winding wires, the wires are inserted from the slot, and the windings are composed of inner windings and outer windings. When embedding or winding wires, adjacent two-phase windings are distributed on the same circumference. One phase winding must span another phase winding, and the adjacent two phase windings overlap in space, resulting in a part or most of the slot area being unusable, and the small coils of the inner and outer windings are distributed in the same winding slot. It is easier to damage the windings, resulting in an increase in the failure rate between the turns of the two windings and the withstand voltage. The large circle span of the inner and outer windings is too far. In order to meet the needs of adjacent two-phase windings, there is enough avoidance space at the position of the iron core slot , The length of the two winding coils is lengthened, that is to say, the amount of enameled wire increases, which increases the difficulty in winding the winding and inserting the wire. The rear end of the embedded winding is high, the end loss is high, the cost increases, and the motor efficiency is low.

Utility model content

The technical problem to be solved by the utility model is to aim at the defects of the prior art, change the shape of the winding teeth according to the arrangement of the windings, provide a stator core with an optimized groove size, and use the shape of the teeth to determine the position of the windings. Increase the use area of the groove shape, reduce the length of the coil winding conductor, reduce the loss at the end of the motor, save costs, and improve the degree of automation.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions: a stator with concentric winding is designed, including a stator core and a coil winding, wherein the teeth of the stator core and the yoke form a detachable connection , the yoke is located on the outer periphery of the tooth, and a circular hole is formed in the middle of the tooth; the tooth includes a number of straight teeth and curved teeth arranged in a circular ring, and a ring is formed between the teeth. Wire groove; wherein, there are more than two curved teeth pointing the same between two adjacent straight teeth, and the curved teeth on both sides of each straight tooth point oppositely.

It can be seen from the above scheme that the utility model optimizes the tooth shape of the existing stator core, that is, optimizes the size and structure of the winding slot, determines the position of the winding by the shape of the teeth and the order of the teeth, and improves the precision of the winding slot. The slot area utilization rate reduces the difficulty of winding, reduces the length of the coil conductor, reduces the end loss of the motor coil, improves the life and reliability of the motor, reduces the cost of the motor, makes the design more reasonable, and improves the performance of the motor. Performance, high degree of automation. In the utility model, two or more curved teeth pointing at the same point are arranged between two adjacent straight teeth, and the curved teeth on both sides of each straight tooth are directed oppositely, so that two or more concentric winding stators can be realized. Winding.

Preferably, the curved teeth are in the shape of a "7" and include a tenon at the outer end, an outer winding part, an inner winding part and a tooth bottom, the outer end of the outer winding part is connected to the tenon, and the outer winding part The inner end is connected to the outer end of the inner winding part, the inner end of the inner winding part is connected to the rear end of the tooth bottom, and the inner winding part is bent toward the rear end of the tooth bottom to form an angle with the outer winding part . By adopting the above structure, when the coil is wound, the coil can be automatically approached to the inner circle of the stator, the wires are arranged more tightly, the coil is conveniently wound, and the degree of automation is improved.

Preferably, the coil winding includes an outer coil winding and an inner coil winding, wherein the outer coil winding and the inner coil winding each have four groups, and each group of coil windings is composed of large and small coils, the large coil spans six winding slots, and the small coil Spanning four winding slots; the large and small coils of the outer coil winding are wound on the outer winding parts of the curved teeth on both sides of the straight teeth it surrounds, and the large and small coils of the inner coil winding are wound on the sides of the straight teeth it surrounds On the inner winding part of the curved tooth.

Description of drawings

Fig. 1 is a sectional view of a conventional motor.

Fig. 2 is an enlarged view of the structure of a conventional stator punch.

Fig. 3 is an enlarged view of the existing stator core wound with coils.

Fig. 4 is an axial view of a stator of the present invention.

Fig. 5 is a perspective view of a stator core tooth portion of the stator shown in Fig. 4 .

Fig. 6 is a perspective view of a stator core yoke portion of the stator shown in Fig. 4 .

Fig. 7 is a schematic diagram of the tooth arrangement structure of the stator core tooth part shown in Fig. 5 .

Fig. 8 is a plan view of the tooth ring punching piece of the stator core tooth shown in Fig. 5 .

Fig. 9 is a plan view of a curved tooth of the stator core tooth portion shown in Fig. 5 .

Detailed ways

As shown in Figure 4, an embodiment of the utility model is a 4-pole 24-slot concentric winding stator, including a stator core 60, an outer coil winding 41 and an inner coil winding 42, wherein the stator core 60 is a teeth-yoke separation type The stator core is composed of a detachably connected tooth portion 47 and a yoke portion 45 , the annular yoke portion 45 is located on the outer periphery of the tooth portion 47 , and the tooth portion 47 is located inside the yoke portion 45 . A circular hole 43 is provided in the middle of the tooth portion 47 , and the rotor can be installed in the circular hole 43 . The tooth portion 47 can be covered with an insulating sleeve or an injection molded insulating sleeve to prevent the coil winding from contacting the tooth portion 47 . When manufacturing the stator, the coil winding can be directly wound on the tooth part 47 by winding equipment, and then the tooth part 47 wound with the coil winding can be installed in the yoke part 45, so as to reduce the difficulty of winding and improve the coil winding capacity. winding efficiency.

As shown in FIG. 5 and FIG. 6 , the tooth portion 47 and the yoke portion 45 of the stator core 60 are respectively formed by laminating a plurality of stator stamping pieces with the same shape, and the stator stamping plate is formed by stamping silicon steel sheets. The inner wall of the yoke 45 is provided with a plurality of grooves 46, and the tooth portion 47 has a plurality of teeth 48, the teeth 48 include several straight teeth 481 and several curved teeth 482 in the shape of a "7", and a winding ring is formed between the teeth. Trunk 44. The outer end of each tooth 48 is provided with a tenon 49 . When the tooth portion 47 is installed on the yoke portion 45 , the tenon 49 cooperates with the groove 46 to realize the fixed connection between the tooth portion 47 and the yoke portion 45 .

As shown in FIG. 7 , the straight teeth 481 and the curved teeth 482 form a ring and form a circle. As shown in Figure 9, the shape of the curved teeth 482 is similar to that of the lower limbs of the human body, including the tenon 49 at the outer end, the outer winding part 4821, the inner winding part 4822 and the tooth bottom 4823, the outer end of the outer winding part 4821 Connected with the tenon 49 , the inner end of the outer winding part 4821 is connected with the outer end of the inner winding part 4822 , and the inner end of the inner winding part 4822 is connected with the rear end of the tooth bottom 4823 . The inner winding portion 4822 is bent toward the rear end of the tooth bottom 4823 to form a certain angle α with the outer winding portion 4821 . According to the number of concentric coil windings, there are two curved teeth 482 pointing the same between two adjacent straight teeth 481 , and the curved teeth 482 on both sides of each straight tooth 481 point oppositely. The direction of the curved tooth 482 mentioned here refers to the direction from the rear end of the bottom 4823 of the curved tooth 482 to the front end.

As shown in Figure 8, a tooth ring punch 50 is provided which connects several straight teeth 481 and several curved teeth 482 together in a bridging manner. Open, the shape and arrangement order of the teeth of the tooth ring punching sheet 50 are exactly the same as the set stator tooth shape, so that the tooth ring punching sheet 50 completely overlaps with the stator teeth shown in Figure 7, and the tooth ring punching sheet 50 is stacked with the tooth shown in FIG. 7 to form the stator tooth portion 47 shown in FIG. 5 . The connection modes of the tooth ring punching piece 50 in the stator core of the present invention can be divided into upper-lower connection, upper-middle-lower connection and alternate connection.

In the stator shown in FIG. 4 , the outer coil winding 41 is wound on the bottom of the winding slot 44 of the stator core 60 , farther away from the axis of the stator core 60 . The inner coil winding 42 is wound at a position close to the opening of the winding slot 44 and closer to the axis of the stator core 60 . The outer coil winding 41 and the inner coil winding 42 have 4 poles respectively, that is, there are four sets of outer coil windings 41 and four sets of inner coil windings 42, wherein each set of coil windings is composed of large and small coils, and the large coil spans six winding slots 44 , the small coil spans four winding slots 44 . The large and small coils of the outer coil winding 41 are wound on the outer winding portion 4821 of the curved tooth 482 on both sides of the straight tooth 481 that it surrounds, and the large and small coils of the internal coil winding 42 are wound on the curved teeth on both sides of the straight tooth 481 that it surrounds. on the inner winding portion 4822 of the tooth 482 .

The arrangement of the straight teeth 481 and curved teeth 482 of the above-mentioned stator core can be determined according to the number of coils of the concentric winding. The arrangement mode should be that three curved teeth 482 with the same direction are arranged between two adjacent straight teeth 481, and the curved teeth 482 on both sides of each straight tooth 481 are directed oppositely, and so on.

What is described above is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the premise of the utility model inventive concept, some deformations and improvements can also be made, and these are all Belong to the protection scope of the utility model.

Claims (3)

1. a stator for Concentrical winding, comprises stator core and coil windings, and the tooth portion of wherein said stator core forms dismountable connection with yoke portion, and described yoke portion is positioned at the periphery of described tooth portion, and the middle part of described tooth portion is formed with circular hole; Described tooth portion comprises several straight-tooth and the crooked tooth that is circular arrangement, between tooth and tooth, forms winding slot; It is characterized in that: between adjacent two straight-tooth, have two identical crooked teeth of above sensing, the sensing of the crooked tooth of each straight-tooth both sides is contrary.

2. the stator of Concentrical winding according to claim 1, it is characterized in that: described crooked tooth is " 7 " font, at the bottom of comprising and being positioned at the tenon of outer end, outer winding section, winding section and tooth, the outer end of outer winding section is connected with tenon, the inner of outer winding section is connected with the outer end of interior winding section, the inner of interior winding section is connected with the rear end at the bottom of tooth, and interior winding section is towards the rear extreme direction bending at the bottom of tooth and have angle with outer winding section shape.

3. the stator of Concentrical winding according to claim 2, it is characterized in that: described coil windings comprises exterior loop winding and interior loop winding, wherein exterior loop winding and interior loop winding respectively have four groups, every group of coil windings forms by large small coil, large coil is crossed over six winding slots, and small coil is crossed over four winding slots; The large small coil of exterior loop winding around its around the outer winding section of crooked tooth of straight-tooth both sides on, the large small coil of interior loop winding around its around the interior winding section of crooked tooth of straight-tooth both sides on.

Images