Three-phase claw-pole stepping motor

Abstract

The utility model discloses a three-phase claw-pole stepping motor, which comprises a shell, a rotating shaft is inserted into the shell along the axial direction of the shell, and a magnet is sleeved outside the rotating shaft; a first magnet yoke and a second magnet yoke are coaxially mounted on the outer side of the magnet; a plurality of first claw poles are arranged at the end, close to the first magnet yoke, of the inner side of the shell in the circumferential direction, a plurality of second claw poles inserted into the first claw poles in a staggered mode are arranged on one side of the first magnet yoke, a plurality of third claw poles are arranged on the other side of the first magnet yoke, and a plurality of fourth claw poles inserted into the third claw poles in a staggered mode are arranged on one side of the second magnet yoke. The other side of the second magnet yoke is provided with a plurality of fifth claw poles, and the other end of the inner side of the shell is provided with a plurality of sixth claw poles which are inserted with the fifth claw poles in a staggered manner; a first coil rack is coaxially sleeved outside the first claw pole and the second claw pole, a second coil rack is coaxially sleeved outside the third claw pole and the fourth claw pole, and a third coil rack is sleeved between the fifth claw pole and the sixth claw pole. According to the utility model, the problems of unstable operation, noise and vibration of the existing claw pole motor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a three-phase claw-pole stepping motor. Background Art

[0002] The claw pole motor is a specially designed AC synchronous motor characterized by a claw pole magnet structure. Compared with the traditional cylindrical magnetic pole, the claw pole pole body presents a claw or tooth-like appearance, which improves the performance and efficiency of the motor. Existing claw pole motors are usually two-phase motors with a large step angle, resulting in poor motor running stability, noise and vibration. Utility Model Content

[0003] The main purpose of the utility model is to provide a three-phase claw-pole stepping motor, aiming to solve the problems of unstable operation, noise and vibration of the existing claw-pole motor.

[0004] To achieve the above-mentioned purpose, the utility model provides a three-phase claw-pole stepper motor, comprising a housing, wherein a rotating shaft is inserted into the housing along its axial direction, and a magnet is sleeved on the outer side of the rotating shaft; a first yoke and a second yoke are coaxially mounted on the outer side of the magnet; a plurality of first claw poles are circumferentially arranged at one end of the inner side of the housing close to the first yoke, a plurality of second claw poles staggered and inserted with the first claw poles are arranged on one side of the first yoke, a plurality of third claw poles are arranged on the other side of the first yoke, a plurality of fourth claw poles staggered and inserted with the third claw poles are arranged on one side of the second yoke, a plurality of fifth claw poles are arranged on the other side of the second yoke, and a plurality of sixth claw poles staggered and inserted with the fifth claw poles are arranged at the other end of the inner side of the housing;

[0005] A first coil frame is coaxially sleeved outside the first claw pole and the second claw pole, a second coil frame is coaxially sleeved outside the third claw pole and the fourth claw pole, and a third coil frame is sleeved between the fifth claw pole and the sixth claw pole.

[0006] Optionally, the first claw pole, the second claw pole, the third claw pole, the fourth claw pole, the fifth claw pole and the sixth claw pole are respectively arranged in a trapezoidal structure.

[0007] Optionally, the number of the first claw pole, the second claw pole, the third claw pole, the fourth claw pole, the fifth claw pole and the sixth claw pole is equal, and each is set to at least two.

[0008] Optionally, a first bearing and a second bearing are respectively installed between the rotating shaft and two ends of the housing.

[0009] Optionally, the housing is configured as a split structure, including a first housing, a second housing and a third housing sequentially installed along its axial direction, the first claw pole is disposed on the first housing, and the sixth claw pole is disposed on the third housing.

[0010] Optionally, a first notch is provided on an edge where the first shell and the second shell are joined, a second notch is provided on the second shell and joined with the first notch, a third notch is provided on an edge where the second shell and the third shell are joined, and a fourth notch is provided on the third shell and joined with the third notch.

[0011] Optionally, a first protrusion is provided on the edge of the first yoke, and the first protrusion is inserted between the first notch and the second notch; a second protrusion is provided on the edge of the second yoke, and the second protrusion is inserted between the third notch and the fourth notch.

[0012] Optionally, a first lead-out structure is further provided at the edge of the first magnetic yoke, and a second lead-out structure is further provided at the edge of the second magnetic yoke.

[0013] Optionally, a first take-out plate is installed at an outer end of the first housing, and a second take-out plate is installed at an outer end of the third housing.

[0014] Optionally, the first pickup plate and the first housing, the first housing and the second housing, the second housing and the third housing, and the third housing and the second pickup plate are fixedly connected by welding.

[0015] The beneficial effects of the utility model are: improving the structure of the existing claw-pole motor, realizing a three-phase claw-pole motor through the structural design of the casing and the yoke, and when the number of claw poles is certain, compared with the two-phase motor, the step angle of the three-phase motor is two-thirds of that of the two-phase motor, which can make the motor run more smoothly, reduce noise and vibration, and improve the torque of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of the motor of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the motor of the utility model from another perspective;

[0019] Figure 3 This is a schematic diagram of the internal yoke installation structure of the motor of the utility model;

[0020] Figure 4This is a schematic diagram of the installation structure of the internal coil frame of the motor of the utility model;

[0021] Figure 5 This is a schematic diagram of the first housing structure of the utility model;

[0022] Figure 6 This is a cross-sectional view of the overall structure of the motor of the utility model;

[0023] Description of reference numerals:

[0024] Rotating shaft 1; first take-out plate 2; first bearing 21; first housing 31; first claw pole 311; first notch 313; second housing 32; second notch 323; third notch 324; third housing 33; fourth notch 333; second take-out plate 4; second bearing 41; magnet 5; first yoke 61; second claw pole 611; third claw pole 612; first protrusion 613; second yoke 63; fourth claw pole 631; fifth claw pole 632; second protrusion 633; ​​first outlet structure 71; second outlet structure 73; first wire rack 81; second wire rack 82; third wire rack 83; first coil winding location 91; second coil winding location 92; third coil winding location 93

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0029] One embodiment of the utility model provides a three-phase claw-pole stepper motor, comprising a housing, wherein a rotating shaft 1 is inserted into the housing along its axial direction, and a magnet 5 is sleeved on the outer side of the rotating shaft 1; a first yoke 61 and a second yoke 63 are coaxially mounted on the outer side of the magnet 5; a plurality of first claw poles 311 are circumferentially arranged at one end of the inner side of the housing close to the first yoke 61, a plurality of second claw poles 611 staggered and plugged with the first claw poles 311 are arranged on one side of the first yoke 61, a plurality of third claw poles 612 are arranged on the other side of the first yoke 61, a plurality of fourth claw poles 631 staggered and plugged with the third claw poles 612 are arranged on one side of the second yoke 63, a plurality of fifth claw poles 632 are arranged on the other side of the second yoke 63, and a plurality of sixth claw poles (not shown in the figure) staggered and plugged with the fifth claw poles 632 are arranged at the other end of the inner side of the housing;

[0030] A first coil frame 81 is coaxially sleeved outside the first claw pole 311 and the second claw pole 611 , a second coil frame 82 is coaxially sleeved outside the third claw pole 612 and the fourth claw pole 631 , and a third coil frame 83 is sleeved between the fifth claw pole 632 and the sixth claw pole.

[0031] In this embodiment, the structure of the existing two-phase claw-pole motor is improved, and a three-phase claw-pole motor is proposed, wherein two magnetic yokes are coaxially arranged inside the shell, and the shell is divided into three spaces, each space is staggered by two groups of upper and lower claw poles, and a coil frame is arranged outside the claw pole for winding the coil to form one phase of the motor, and the three spaces form the three phases of the motor, thereby realizing a three-phase claw-pole motor. When the number of claw poles is constant, compared with the two-phase motor, the step angle of the three-phase motor is two-thirds of that of the two-phase motor, which can make the motor run more smoothly, reduce noise and vibration, and increase the torque of the motor.

[0032] Specifically, the first claw pole 311 on the first housing 31 is opposite to the second claw pole 611 of the first magnetic yoke 61 and is interlaced, the first coil frame 81 is sleeved outside the first claw pole 311 and the second claw pole 611 and is located inside the first housing 31, and the coil is wound outside the first coil frame 81 to form the first phase of the motor;

[0033] The third claw pole 612 on the first magnetic yoke 61 and the fourth claw pole 631 of the second magnetic yoke 63 are opposite and interlaced, and the second coil frame 82 is sleeved outside the third claw pole 612 and the fourth claw pole 631 and is located inside the second housing 32. At the same time, the coil is wound outside the second coil frame 82 to form the second phase of the motor;

[0034] The sixth claw pole on the second housing 32 is opposite to the fifth claw pole 632 of the second magnetic yoke 63 and is interlaced. The third coil frame 83 is sleeved on the outside of the fifth claw pole 632 and the sixth claw pole and is located inside the third housing 33. At the same time, a coil is wound on the outside of the third coil frame 83 to form the third phase of the motor.

[0035] Furthermore, the first claw pole 311, the second claw pole 611, the third claw pole 612, the fourth claw pole 631, the fifth claw pole 632 and the sixth claw pole are respectively arranged in a trapezoidal structure. The trapezoidal claw pole design can more effectively distribute the magnetic field and make it more uniform, thereby helping to reduce magnetic field distortion and improve the efficiency and performance of the motor. Since the trapezoidal-shaped magnetic pole can provide more magnetic field density, the motor can generate greater torque at startup, thereby making it easier to start the load. The trapezoidal claw pole can also more effectively suppress changes in the magnetic field, thereby reducing vibration and noise generated when the motor is running.

[0036] Furthermore, the number of the first claw pole 311, the second claw pole 611, the third claw pole 612, the fourth claw pole 631, the fifth claw pole 632 and the sixth claw pole is equal and is set to at least two respectively. A three-phase motor usually has more claw poles, and the number is usually an even number. Common claw pole numbers include 4, 6, 8, 10, etc. In this embodiment, the number of the first claw pole 311, the second claw pole 611, the third claw pole 612, the fourth claw pole 631, the fifth claw pole 632 and the sixth claw pole is set to at least two respectively, and the number of claw poles in each phase is four.

[0037] Furthermore, a first bearing 21 and a second bearing 41 are respectively installed between the rotating shaft 1 and the two ends of the housing to ensure the stability of the rotating shaft 1 during rotation and the stability of the motor transmission process.

[0038] Furthermore, the housing is configured as a split structure, including a first housing 31, a second housing 32, and a third housing 33 sequentially installed along its axial direction, the first claw pole 311 is disposed on the first housing 31, and the sixth claw pole is disposed on the third housing 33. In this embodiment, the housing is a split structure, which facilitates the assembly and disassembly of the overall structure of the motor, facilitates the maintenance and overhaul of the electrodes in the later stage, and reduces the maintenance cost.

[0039] Further, the first notch 313 is provided at the edge where the first housing 31 and the second housing 32 are connected, the second housing 32 is provided with a second notch 323 connected to the first notch 313, the second housing 32 and the third housing 33 are provided with a third notch 324 at the edge where the second housing 32 and the third housing 33 are connected, and the third housing 33 is provided with a fourth notch 333 connected to the third notch 324. In this embodiment, the first notch 313, the second notch 323, the third notch 324 and the fourth notch 333 are respectively provided with two, which is convenient for subsequent structural positioning and wiring.

[0040] Furthermore, the first yoke 61 is provided with a first protrusion 613 on its edge, and the first protrusion 613 is inserted between the first notch 313 and the second notch 323; the second yoke 63 is provided with a second protrusion 633 on its edge, and the second protrusion 633 is inserted between the third notch 324 and the fourth notch 333. The positioning and clamping between the protrusions and the notch can prevent the motor from moving radially during installation and operation, so as to ensure the stability and service life of the motor structure.

[0041] Furthermore, a first wire-out structure 71 is provided at the edge of the first magnetic yoke 61, and a second wire-out structure 73 is provided at the edge of the second magnetic yoke 63. The first wire-out structure 71 extends to the outside of the motor along the space between the first notch 313 and the second notch 323, and the second wire-out structure 73 extends to the outside of the motor along the space between the third notch 324 and the fourth notch 333.

[0042] Furthermore, a first take-out plate 2 is installed at the outer end of the first housing 31, and a second take-out plate 4 is installed at the outer end of the third housing 33. The take-out plate provides a stable platform for the motor, which is used to install the motor and ensure that the motor can be firmly fixed at the required position; the take-out plate can also be used to transmit the power output by the motor to other mechanical parts or systems, and is used to withstand the power and vibration generated by the motor, ensuring that the motor can operate safely and effectively, and properly cooperate with other mechanical parts or systems.

[0043] Furthermore, the first take-out plate 2 and the first housing 31, the first housing 31 and the second housing 32, the second housing 32 and the third housing 33, and the third housing 33 and the second take-out plate 4 are fixedly connected by welding. In this embodiment, the structures are fixed by welding, which can ensure the rigidity and stability of the entire housing structure of the motor, thereby ensuring the safe and smooth operation of the motor and its service life.

[0044] The above description is only an optional embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A three-phase claw-pole stepper motor, characterized in that: The invention comprises a shell, wherein a rotating shaft is inserted into the shell along its axial direction, and a magnet is sleeved on the outer side of the rotating shaft; a first yoke and a second yoke are coaxially installed on the outer side of the magnet; a plurality of first claw poles are circumferentially arranged at one end of the inner side of the shell close to the first yoke, a plurality of second claw poles are arranged on one side of the first yoke and interlaced with the first claw poles, a plurality of third claw poles are arranged on the other side of the first yoke, a plurality of fourth claw poles are arranged on one side of the second yoke and interlaced with the third claw poles, a plurality of fifth claw poles are arranged on the other side of the second yoke, and a plurality of sixth claw poles are arranged on the other end of the inner side of the shell and interlaced with the fifth claw poles; A first coil frame is coaxially sleeved outside the first claw pole and the second claw pole, a second coil frame is coaxially sleeved outside the third claw pole and the fourth claw pole, and a third coil frame is sleeved between the fifth claw pole and the sixth claw pole.

2. The three-phase claw-pole stepper motor according to claim 1, characterized in that: The first claw pole, the second claw pole, the third claw pole, the fourth claw pole, the fifth claw pole and the sixth claw pole are respectively arranged in a trapezoidal structure.

3. The three-phase claw-pole stepper motor according to claim 2, characterized in that: The number of the first claw pole, the second claw pole, the third claw pole, the fourth claw pole, the fifth claw pole and the sixth claw pole is equal and is respectively set to at least two.

4. The three-phase claw-pole stepper motor according to claim 1, characterized in that: A first bearing and a second bearing are respectively installed between the rotating shaft and two ends of the housing.

5. The three-phase claw-pole stepper motor according to claim 1, characterized in that: The housing is configured as a split structure, including a first housing, a second housing, and a third housing sequentially installed along its axial direction, the first claw pole is disposed on the first housing, and the sixth claw pole is disposed on the third housing.

6. The three-phase claw-pole stepper motor according to claim 5, characterized in that: A first notch is provided at an edge where the first shell and the second shell are joined, a second notch is provided at the second shell and joined with the first notch, a third notch is provided at an edge where the second shell and the third shell are joined, and a fourth notch is provided at the third shell and joined with the third notch.

7. The three-phase claw-pole stepper motor according to claim 6, characterized in that: The first yoke edge is provided with a first protrusion, and the first protrusion is inserted between the first notch and the second notch; the second yoke edge is provided with a second protrusion, and the second protrusion is inserted between the third notch and the fourth notch.

8. The three-phase claw-pole stepper motor according to claim 6, characterized in that: The first yoke edge is also provided with a first lead-out structure, and the second yoke edge is also provided with a second lead-out structure.

9. The three-phase claw-pole stepper motor according to claim 5, characterized in that: A first take-out plate is installed at the outer end of the first housing, and a second take-out plate is installed at the outer end of the third housing.

10. The three-phase claw-pole stepper motor according to claim 9, characterized in that: The first take-out plate and the first housing, the first housing and the second housing, the second housing and the third housing, and the third housing and the second take-out plate are fixedly connected by welding.

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