A claw shape optimization structure of a three-phase claw pole type stepping motor stator

Abstract

The utility model relates to motor stator technical field, concretely is a kind of claw pole type stepper motor stator's claw optimization structure, including stator assembly, the stator assembly includes first stator sheet, second stator sheet, third stator sheet, fourth stator sheet, fifth stator sheet and sixth stator sheet;The first stator sheet, second stator sheet, third stator sheet, fourth stator sheet, fifth stator sheet and sixth stator sheet are all by stator ring part and stator claw part are composed, multiple stator claw parts are integrally injection molded on the inner wall of stator ring part along circumference, and the shape of this stator claw part is claw shape I. The claw of the utility model has moderate torque, and noise is minimum.

Description

Technical Field

[0001] This utility model relates to the field of motor stator technology, specifically to an optimized claw-shaped structure for a three-phase claw-pole stepper motor stator. Background Technology

[0002] The stator claw shape of a three-phase claw-pole stepper motor has several effects on the motor's performance, as detailed below:

[0003] Magnetic flux path: The shape of the claw poles determines the path of the magnetic flux. A well-designed claw shape allows the magnetic flux to pass through the air gap between the stator and rotor more concentratedly and efficiently, enhancing the air gap magnetic density and providing electromagnetic torque to the motor. If the claw shape is poorly designed, magnetic flux may leak or have a tortuous path, leading to increased magnetic reluctance, reduced magnetic flux utilization, and decreased motor output torque.

[0004] Magnetic field uniformity: The size, spacing, and tilt angle of the claw shape affect the uniformity of the air gap magnetic field. A uniform magnetic field allows the rotor to experience more balanced forces during rotation, reducing vibration and noise. An uneven magnetic field causes uneven forces on the rotor, leading to unstable motor operation and reduced positioning accuracy.

[0005] Cogging effect: The shape and size of the teeth of the claw pole relative to the stator affect the cogging effect. A suitable claw shape can reduce cogging torque, which can cause jerking during motor operation and affect the stepping progress. By optimizing the claw shape, the stepping angle of the motor can be made more precise, improving positioning accuracy and motion smoothness.

[0006] Starting torque: The geometry of the claw poles affects the starting torque of the motor. A well-designed claw shape can generate a larger starting torque, enabling the motor to quickly overcome load resistance and begin operation. For example, increasing the area of ​​the claw poles or optimizing their tilt angle can increase the force between the magnetic flux and the rotor, thus providing starting torque.

[0007] Operating torque: During motor operation, the claw shape affects the stability and magnitude of the torque. A well-designed claw shape can make the torque output smoother, reduce torque fluctuations, and enable the motor to operate stably under different load conditions.

[0008] Iron loss: The shape and size of the claw shape affect the magnetic flux density and magnetic circuit length in the iron core, thus affecting iron loss. Optimizing the claw shape can reduce hysteresis loss and eddy current loss in the iron core, improving motor efficiency.

[0009] However, most existing three-phase claw-pole stepper motor stators have claw-type II stators (such as...). Figure 4 (as shown) and claw-shaped III (as shown) Figure 5 As shown, these claw-shaped designs cannot meet people's needs in terms of torque and noise, so an optimized claw-shaped structure for the stator of a three-phase claw-pole stepper motor is needed. Utility Model Content

[0010] The purpose of this invention is to provide an optimized claw-shaped structure for the stator of a three-phase claw-pole stepper motor to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, this utility model provides the following technical solution: a claw-shaped optimized structure for the stator of a three-phase claw-pole stepper motor, comprising a stator assembly, wherein the stator assembly includes a first stator lamination, a second stator lamination, a third stator lamination, a fourth stator lamination, a fifth stator lamination, and a sixth stator lamination; the first stator lamination, the second stator lamination, the third stator lamination, the fourth stator lamination, the fifth stator lamination, and the sixth stator lamination are all composed of a stator ring portion and a stator claw portion, wherein a plurality of stator claw portions are integrally injection molded along the circumferential direction on the inner wall of the stator ring portion, and the shape of the stator claw portion is claw-shaped I.

[0012] Preferably, the first stator lamination, the second stator lamination, the third stator lamination, the fourth stator lamination, the fifth stator lamination, and the sixth stator lamination are arranged in order from bottom to top to form a stator assembly.

[0013] Preferably, the stator assemblies are arranged in the following order from bottom to top: the first stator lamination placed upright, the second stator lamination placed upside down, the third stator lamination placed upright, the fourth stator lamination placed upside down, the fifth stator lamination placed upright, and the sixth stator lamination placed upside down.

[0014] Preferably, the stator claws between the first and second stator plates, the third and fourth stator plates, and the fifth and sixth stator plates are staggered during arrangement.

[0015] Preferably, the surface of the stator ring is provided with a plurality of positioning holes, which facilitates the positioning work during coil installation.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: In the implementation of the optimized claw-shaped structure of the stator of this three-phase claw-pole stepper motor, since the first, second, third, fourth, fifth, and sixth stator plates are all composed of a stator ring and stator claws, the stator claws between stator plates, between stator plates, and between stator plates and the sixth stator plate are staggered during arrangement. Multiple stator claws are integrally injection-molded circumferentially on the inner wall of the stator ring, and the shape of these stator claws is claw-shaped I. The claw shape of this utility model has moderate torque and minimal noise. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This is an enlarged schematic diagram of the stator lamination structure of this utility model;

[0020] Figure 4 This is an enlarged schematic diagram of the existing claw-shaped II structure;

[0021] Figure 5 This is an enlarged schematic diagram of the claw-shaped III structure of this utility model.

[0022] In the figure: 1. Stator assembly; 2. First stator lamination; 3. Second stator lamination; 4. Third stator lamination; 5. Fourth stator lamination; 6. Fifth stator lamination; 7. Sixth stator lamination; 8. Stator ring; 9. Stator claw; 91. Claw I. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0024] This utility model provides a claw-shaped optimized structure for the stator of a three-phase claw-pole stepper motor, as shown in the following figure. Figure 1 as well as Figure 2 As shown, it includes a stator assembly 1, which includes a first stator lamination 2, a second stator lamination 3, a third stator lamination 4, a fourth stator lamination 5, a fifth stator lamination 6, and a sixth stator lamination 7. The first stator lamination 2, the second stator lamination 3, the third stator lamination 4, the fourth stator lamination 5, the fifth stator lamination 6, and the sixth stator lamination 7 are arranged in order from bottom to top to form the stator assembly 1. The arrangement order of the stator assembly 1 from bottom to top is as follows: the first stator lamination 2 is placed upright, the second stator lamination 3 is placed upside down, the third stator lamination 4 is placed upright, the fourth stator lamination 5 is placed upside down, the fifth stator lamination 6 is placed upright, and the sixth stator lamination 7 is placed upside down.

[0025] During implementation, first place the first stator segment 2 upright, then place the second stator segment 3 upside down, then place the third stator segment 4 upright, then place the fourth stator segment 5 upside down, and finally place the fifth stator segment 6 upright and the sixth stator segment 7 upside down.

[0026] Furthermore, such as Figure 2 as well as Figure 3 As shown, the first stator lamination 2, the second stator lamination 3, the third stator lamination 4, the fourth stator lamination 5, the fifth stator lamination 6, and the sixth stator lamination 7 are all composed of a stator ring portion 8 and a stator claw portion 9. The stator claw portions 9 between the first stator lamination 2 and the second stator lamination 3, the third stator lamination 4 and the fourth stator lamination 5, the fifth stator lamination 6 and the sixth stator lamination 7 are staggered and interlocked during arrangement. Multiple stator claw portions 9 are integrally injection molded along the circumference on the inner wall of the stator ring portion 8. The shape of the stator claw portion 9 is claw-shaped I91. Multiple positioning holes are opened on the surface of the stator ring portion 8, which facilitates the positioning work during coil installation.

[0027] To verify the effectiveness of the claw-shaped I of this utility model in practical use, stators of the claw-shaped I of this utility model, the existing claw-shaped II, and the existing claw-shaped III were obtained by wire cutting. These were then assembled into a three-phase claw-pole stepper motor, and its torque and noise were measured. The specific values ​​are as follows:

[0028]

[0029]

[0030]

[0031] The results of the pull-out torque are: Claw Type II > Claw Type I > Claw Type III.

[0032]

[0033]

[0034] Noise, results: Claw type I < Claw type III > Claw type II.

[0035] In summary, in terms of torque and noise, the claw-shaped I91 of this utility model has moderate torque and the best noise level.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A claw-shaped optimized structure for the stator of a three-phase claw-pole stepper motor, comprising a stator assembly (1), characterized in that: The stator assembly (1) includes a first stator lamination (2), a second stator lamination (3), a third stator lamination (4), a fourth stator lamination (5), a fifth stator lamination (6), and a sixth stator lamination (7). The first stator lamination (2), the second stator lamination (3), the third stator lamination (4), the fourth stator lamination (5), the fifth stator lamination (6), and the sixth stator lamination (7) are all composed of a stator ring portion (8) and a stator claw portion (9). Multiple stator claw portions (9) are integrally injection molded along the circumferential direction on the inner wall of the stator ring portion (8). The shape of the stator claw portion (9) is claw-shaped I (91).

2. The claw-shaped optimized structure of a three-phase claw-pole stepper motor stator according to claim 1, characterized in that: The first stator lamination (2), the second stator lamination (3), the third stator lamination (4), the fourth stator lamination (5), the fifth stator lamination (6), and the sixth stator lamination (7) are arranged in order from bottom to top to form a stator assembly (1).

3. The claw-shaped optimized structure of a three-phase claw-pole stepper motor stator according to claim 2, characterized in that: The stator assembly (1) is arranged from bottom to top as follows: the first stator piece (2) placed upright, the second stator piece (3) placed upside down, the third stator piece (4) placed upright, the fourth stator piece (5) placed upside down, the fifth stator piece (6) placed upright, and the sixth stator piece (7) placed upside down.

4. The claw-shaped optimized structure of a three-phase claw-pole stepper motor stator according to claim 1, characterized in that: The stator claws (9) between the first stator lamination (2), the second stator lamination (3), the third stator lamination (4), the fourth stator lamination (5), the fifth stator lamination (6), and the sixth stator lamination (7) are staggered during arrangement.

5. The claw-shaped optimized structure of a three-phase claw-pole stepper motor stator according to claim 1, characterized in that: The surface of the stator ring (8) is provided with multiple positioning holes, which facilitate the positioning work during coil installation.

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