阅读说明：本技术 一种18°步距角步进电机 (18-degree step angle stepping motor ) 是由 彭光明 金万兵 蒋浣浣 于 2019-08-20 设计创作，主要内容包括：本发明涉及一种18°步距角步进电机,包括绕组、转子和定子,所述转子设有5对极,所述定子为分体式结构,其包括偶数个形状相同的定子块,每个所述定子块分布有至少两个定子齿,每个定子块中的相邻定子齿之间形成用于绕组绕制的定子轭部。与现有技术相比,本发明具有大大减小电机槽口尺寸对电机的绕线的限制、增加了电机的槽满率等优点。(The invention relates to an 18-degree step angle stepping motor which comprises a winding, a rotor and a stator, wherein the rotor is provided with 5 pairs of poles, the stator is of a split structure and comprises an even number of stator blocks with the same shape, at least two stator teeth are distributed on each stator block, and a stator yoke part for winding the winding is formed between the adjacent stator teeth in each stator block. Compared with the prior art, the motor winding device has the advantages that the limitation of the size of the motor notch on the winding of the motor is greatly reduced, the slot fullness rate of the motor is increased, and the like.)

1. The 18-degree step angle stepping motor comprises a winding, a rotor and a stator, wherein the rotor is provided with 5 pairs of poles, and the 18-degree step angle stepping motor is characterized in that the stator is of a split structure and comprises an even number of stator blocks with the same shape, at least two stator teeth are distributed on each stator block, and a stator yoke part for winding the winding is formed between the adjacent stator teeth in each stator block.

2. An 18 ° step angle stepper motor as defined in claim 1, wherein the outer diameter of said stator yoke is smaller than the stator outer diameter.

3. An 18 ° step-angle stepping motor according to claim 1, wherein the included angle between adjacent stator pieces is 36 °, 54 ° or 90 °, the stator pieces are of a structure that one end is wide and the other end is narrow, and the stator teeth are arranged at the narrow end.

4. An 18 ° step-by-step motor as claimed in claim 1, wherein there are four stator pieces, and there are two stator teeth on each stator piece, and the angle between the two stator teeth is 36 °.

5. An 18 ° step-by-step motor according to claim 4, wherein four of said stator pieces are stator piece 11, stator piece 12, stator piece 13 and stator piece 14 in sequence, and the included angles between the stator pieces are 36 °, 54 °, 36 ° and 90 ° in sequence, wherein stator piece 11 and stator piece 12 belong to phase A, and stator piece 13 and stator piece 14 belong to phase B.

6. An 18 ° step-angle stepping motor according to claim 4, wherein in a counterclockwise direction, said stator teeth of stator piece 11 are TA1 and TA2, said stator teeth of stator piece 12 are TA3 and TA4, said stator teeth of stator piece 13 are TB1 and TB2, and said stator teeth of stator piece 14 are TB3 and TB 4;

stator yokes YA1, YA2, YB1 and YB2 are sequentially formed among the stator teeth TA1 and TA2, TA3 and TA4, TB1 and TB2, TB3 and TB4, the corresponding thicknesses of the stator yokes YA1, YA2, YB1 and YB2 are LA1, LA2, LB1 and LB2 respectively, wherein LA1 is LA2 and LB1 is LB 2.

7. An 18 ° step-angle stepping motor according to claim 6, wherein said stator yokes YA1 and YA2 are elongated in the approaching direction to connect said stator pieces 11 and 12 to each other to obtain stator pieces 112 and a stator yoke YA12, and said stator yokes YB1 and YB2 are elongated in the approaching direction to connect said stator pieces 13 and 14 to obtain stator pieces 123 and a stator yoke YB 12;

wherein 0.5 LA1< LA12 ═ LB12<1.5 LA1, wherein LA12 is the thickness of the stator yoke YA12 and LB12 is the thickness of the stator yoke YB 12.

8. An 18 ° step-by-step motor according to claim 4, wherein four of said stator pieces are stator piece 21, stator piece 22, stator piece 23 and stator piece 24 in sequence in a counterclockwise direction, the included angle between the stator pieces is 54 °, wherein stator piece 21 and stator piece 23 belong to phase A, and stator piece 22 and stator piece 24 belong to phase B.

9. An 18 ° step-angle stepping motor according to claim 8, wherein in a counterclockwise direction, said stator teeth of stator piece 21 are TA1 and TA2, said stator teeth of stator piece 23 are TA3 and TA4, said stator teeth of stator piece 22 are TB1 and TB2, and said stator teeth of stator piece 24 are TB3 and TB 4;

stator yokes YA1, YA2, YB1 and YB2 are sequentially formed among the stator teeth TA1 and TA2, TA3 and TA4, TB1 and TB2, TB3 and TB4, the corresponding thicknesses of the stator yokes YA1, YA2, YB1 and YB2 are LA1, LA2, LB1 and LB2 respectively, wherein LA1 is LA2 and LB1 is LB 2.

10. An 18 ° step-angle stepping motor according to claim 9, wherein said stator yokes YA1 and YB1 are elongated in the approaching direction to connect said stator pieces 21 and 22 to each other to obtain stator pieces 212 and stator yoke YAB1, and said stator yokes YA2 and YB2 are elongated in the approaching direction to connect said stator pieces 23 and 24 to each other to obtain stator pieces 223 and stator yoke YAB 2;

wherein 0.5 LA1< LAB1 ═ LAB2<1.5 LA1, wherein LAB1 is the thickness of the stator yoke YAB1 and LAB2 is the thickness of the stator yoke YAB 2.

Technical Field

The invention relates to a stepping motor, in particular to an 18-degree stepping angle stepping motor.

Background

An existing 18-degree two-phase stepping motor is shown in fig. 1, fig. 2 and fig. 3, wherein 1A, 1B and 1C are stators of a first scheme, a second scheme and a third scheme respectively, 2 is a rotor of the existing scheme, the rotor can be formed by lamination of punching sheets or can be a permanent magnet rotor, and the punching sheets and the permanent magnet rotor are N, S alternating and have 5 pairs of poles.

In the first prior art, the stator has 4 main poles, a phase a main poles a1 and a2 and a phase B main poles B1 and B2, each of which has one stator tooth, and there are 4 stator teeth TA1, TA2, TB1 and TB 2. The 8 main poles are arranged in the anticlockwise direction and are arranged in the sequence of A1, B1, A2 and B2, and the included angles among the 8 main poles are all 90 degrees.

In the second conventional scheme, the stator has 8 main poles, a phase a main poles a1, a2, A3, a4 and a phase B main poles B1, B2, B3 and B4, each main pole has one stator tooth, and there are 8 stator teeth TA1, TA2, TA3, TA4, TB1, TB2, TB3 and TB 4. The 8 main poles are arranged in the anticlockwise direction and are A1, A2, A3, A4, B1, B2, B3 and B4, and included angles among the 8 main poles are respectively 36 degrees, 54 degrees, 36 degrees and 90 degrees.

In the third prior art, the stator has 8 main poles, a phase a main poles a1, a2, A3, a4 and a phase B1, B2, B3, B4, each of which has one stator tooth, and there are 8 stator teeth TA1, TA2, TA3, TA4, TB1, TB2, TB3, TB 4. The 8 main poles are arranged in the anticlockwise direction and are A1, A2, B1, B2, A3, A4, B3 and B4, and included angles among the 8 main poles are respectively 36 degrees, 54 degrees, 36 degrees and 54 degrees.

In the existing scheme I, scheme II and scheme III, the following defects exist:

the stator tooth number is less, the utilization rate of the magnetic field of the motor is lower, and the output torque of the motor is smaller.

In the first scheme, the second scheme and the third scheme, when the outer diameter of the stator is smaller than 20mm, the notch of the motor is very small, and difficulty is caused in winding the motor; meanwhile, because the winding is wound on the main electrode of the motor, the space of the winding mouth for entering and exiting the slot can occupy the area in the slot, the slot fullness rate of the motor is influenced, and the output torque of the motor is further influenced.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned deficiencies of the prior art and providing an 18 step angle stepper motor.

The purpose of the invention can be realized by the following technical scheme:

the 18-degree step angle stepping motor comprises a winding, a rotor and a stator, wherein the rotor is provided with 5 pairs of poles, the stator is of a split structure and comprises an even number of stator blocks with the same shape, at least two stator teeth are distributed on each stator block, and a stator yoke part for winding the winding is formed between the adjacent stator teeth in each stator block.

Preferably, the outer diameter of the stator yoke is smaller than the stator outer diameter.

Preferably, the included angle between adjacent stator blocks is 36 degrees, 54 degrees or 90 degrees, the stator blocks are of a structure with one wide end and the other narrow end, and the stator teeth are arranged at one narrow end.

Preferably, the number of the stator blocks is four, and each stator block is provided with two stator teeth, and an included angle between the two stator teeth is 36 °.

Preferably, in the counterclockwise direction, the four stator blocks are the stator block 11, the stator block 12, the stator block 13 and the stator block 14 in sequence, and included angles between the stator blocks are 36 °, 54 °, 36 ° and 90 ° in sequence, wherein the stator block 11 and the stator block 12 belong to phase a, and the stator block 13 and the stator block 14 belong to phase B.

Preferably, in the counterclockwise direction, the stator teeth on stator piece 11 are sequentially TA1 and TA2, the stator teeth on stator piece 12 are sequentially TA3 and TA4, the stator teeth on stator piece 13 are sequentially TB1 and TB2, and the stator teeth on stator piece 14 are sequentially TB3 and TB 4;

stator yokes YA1, YA2, YB1 and YB2 are sequentially formed among the stator teeth TA1 and TA2, TA3 and TA4, TB1 and TB2, TB3 and TB4, the corresponding thicknesses of the stator yokes YA1, YA2, YB1 and YB2 are LA1, LA2, LB1 and LB2 respectively, wherein LA1 is LA2 and LB1 is LB 2.

Preferably, the stator yokes YA1 and YA2 are extended in the approaching direction to connect the stator blocks 11 and the stator blocks 12 to obtain the stator blocks 112 and the stator yoke YA12, and the stator yokes YB1 and YB2 are extended in the approaching direction to connect the stator blocks 13 and the stator blocks 14 to obtain the stator blocks 123 and the stator yoke YB 12;

wherein 0.5 LA1< LA12 ═ LB12<1.5 LA1, wherein LA12 is the thickness of the stator yoke YA12 and LB12 is the thickness of the stator yoke YB 12.

Preferably, in the counterclockwise direction, the four stator blocks are stator block 21, stator block 22, stator block 23 and stator block 24 in sequence, and the included angles between the stator blocks are 54 °, wherein stator block 21 and stator block 23 belong to phase a, and stator block 22 and stator block 24 belong to phase B.

Preferably, in the counterclockwise direction, the stator teeth on stator piece 21 are sequentially TA1 and TA2, the stator teeth on stator piece 23 are sequentially TA3 and TA4, the stator teeth on stator piece 22 are sequentially TB1 and TB2, and the stator teeth on stator piece 24 are sequentially TB3 and TB 4;

stator yokes YA1, YA2, YB1 and YB2 are sequentially formed among the stator teeth TA1 and TA2, TA3 and TA4, TB1 and TB2, TB3 and TB4, the corresponding thicknesses of the stator yokes YA1, YA2, YB1 and YB2 are LA1, LA2, LB1 and LB2 respectively, wherein LA1 is LA2 and LB1 is LB 2.

Preferably, the stator yokes YA1 and YB1 are elongated in the approaching direction to connect the stator blocks 21 and 22 to obtain the stator blocks 212 and the stator yoke YAB1, and the stator yokes YA2 and YB2 are elongated in the approaching direction to connect the stator blocks 23 and the stator blocks 24 to obtain the stator blocks 223 and the stator yoke YAB 2;

wherein 0.5 LA1< LAB1 ═ LAB2<1.5 LA1, wherein LAB1 is the thickness of the stator yoke YAB1 and LAB2 is the thickness of the stator yoke YAB 2.

Compared with the prior art, the invention has the following advantages:

(1) the iron core segmentation and yoke part winding technology of the invention can greatly reduce the limitation of the motor notch size on the motor winding; meanwhile, the winding is at the yoke part of the motor, the in-out space of the winding line nozzle is in the radial direction, the area of the motor groove is not occupied, and the utilization rate of the groove area of the motor is improved.

(2) The iron core segmentation technology is beneficial to realizing the modularized winding production of the motor and improving the production efficiency of the motor.

Drawings

FIG. 1 is a schematic structural diagram of a first conventional scheme;

FIG. 2 is a schematic structural diagram of a second conventional solution;

FIG. 3 is a schematic structural diagram of a third conventional solution;

FIG. 4 is a schematic structural view of embodiment 1;

FIG. 5 is a schematic structural view of example 2;

FIG. 6 is a schematic structural view of embodiment 3;

FIG. 7 is a schematic structural view of example 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

In order to reduce the difficulty of motor winding, improve the full rate of a motor slot and reduce the manufacturing difficulty of a small motor, the invention adopts the following measures:

the adoption is cut apart the iron core technique, reduces the restriction of motor notch size to the wire winding of motor greatly, and simultaneously, the winding coiling of motor is in motor yoke portion, and the wire winding mouth does not occupy motor groove area, has increased the full rate in groove of motor.

The invention relates to an 8-degree step angle stepping motor which comprises a winding, a rotor and a stator, wherein the rotor is provided with 5 pairs of poles, the stator is of a split structure and comprises an even number of stator blocks with the same shape, at least two stator teeth are distributed on each stator block, and a stator yoke part for winding the winding is formed between the adjacent stator teeth in each stator block. The outer diameter of the stator yoke is smaller than the outer diameter of the stator.

Example 1

As shown in fig. 4, the integral stator is divided into four stator blocks 11, 12, 13 and 14, the four stators are the same, wherein the stator blocks 11 and 12 belong to a phase a, the stator blocks 13 and 14 belong to a phase B, each stator block is provided with two stator teeth, and an included angle between the two stator teeth is 36 °.

In the anticlockwise direction, the stator blocks are the stator block 11, the stator block 12, the stator block 13 and the stator block 14 in sequence, and included angles among the stator blocks are 36 degrees, 54 degrees, 36 degrees and 90 degrees in sequence.

Stator teeth on stator block 11 are sequentially TA1 and TA2, stator teeth on stator block 12 are sequentially TA3 and TA4, stator teeth on stator block 13 are sequentially TB1 and TB2, and stator teeth on stator block 14 are sequentially TB3 and TB 4.

Stator yokes YA1, YA2, YB1 and YB2 are sequentially formed among the stator teeth TA1 and TA2, TA3 and TA4, TB1 and TB2, and TB3 and TB4, the outer diameter of the stator yokes is smaller than that of the stator, and the stator blocks are H-shaped, wherein one end of each stator block is wider and the other end of each stator block is narrower.

In this embodiment, the stator yokes YA1, YA2, YB1, YB2 have thicknesses LA1, LA2, LB1, LB2, respectively, where LA 1-LA 2-LB 1-LB 2.

Example 2

As shown in fig. 5, example 2 extends the stator yokes YA1 and YA2 of example 1 in the approaching direction to connect the stator pieces 11 and 12 to obtain the stator pieces 112 and the stator yoke YA12, while the stator yokes YB1 and YB2 extend in the approaching direction to connect the stator pieces 13 and 14 to obtain the stator pieces 123 and the stator yoke YB 12;

wherein 0.5 LA1< LA12 ═ LB12<1.5 LA1, wherein LA12 is the thickness of the stator yoke YA12 and LB12 is the thickness of the stator yoke YB 12.

Example 3

As shown in fig. 6, the integral stator is divided into four stator pieces 21, 22, 23 and 24, the four stator pieces are identical, wherein the stator pieces 21 and 23 are phase a, the stator pieces 22 and 24 are phase B, each stator has two stator teeth, and the included angle between the two stator teeth is 36 °.

In the counterclockwise direction, the stator blocks are the stator block 21, the stator block 22, the stator block 23 and the stator block 24 in sequence, and the included angles among the stator blocks are all 54 degrees.

Stator teeth on stator piece 21 are sequentially TA1 and TA2, stator teeth on stator piece 22 are sequentially TB1 and TB2, stator teeth on stator piece 23 are sequentially TA3 and TA4, and stator teeth on stator piece 24 are sequentially TB3 and TB 4.

Stator yokes YA1, YA2, YB1 and YB2 are sequentially formed between the stator teeth TA1 and TA2, TA3 and TA4, TB1 and TB2, TB3 and TB4, the outer diameter of the yokes is smaller than that of the stators, and the stator blocks are H-shaped, wherein one end of each stator block is wider and the other end of each stator block is narrower.

In this embodiment, the stator yokes YA1, YA2, YB1, YB2 have thicknesses LA1, LA2, LB1, LB2, respectively, where LA 1-LA 2-LB 1-LB 2.

Example 4

As shown in fig. 7, example 4 extends the stator yokes YA1 and YB1 of example 3 in the approaching direction, thereby connecting the stator pieces 21 and 22 to obtain the stator pieces 212 and the stator yoke YAB1, while the stator yokes YA2 and YB2 extend in the approaching direction, thereby connecting the stator pieces 23 and the stator pieces 24 to obtain the stator pieces 223 and the stator yoke YAB 2;

wherein 0.5 LA1< LAB1 ═ LAB2<1.5 LA1, wherein LAB1 is the thickness of the stator yoke YAB1 and LAB2 is the thickness of the stator yoke YAB 2.

Above all embodiments are during the wire winding, and the wire winding nozzle is wound from the notch around yoke portion from top to bottom, and the direction of motion of line mouth is the direction of radius, is different from the circumferencial direction of coiling on the tooth, and the line mouth can not occupy the space in motor groove when the direction of radius coiling, is favorable to improving motor groove filling rate.

Meanwhile, the structure of the stator block greatly improves the winding and production efficiency of the motor.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.