Electric machine stator and electric machine

Abstract

The utility model discloses a motor stator and motor, motor stator includes stator core, winding coil and wire holder, and stator core is formed by a plurality of core pieces lamination, and the core piece includes tooth part and yoke part, and two wire holders are oppositely arranged in the inside of stator core along the length direction of core piece, and wire holder and stator core mutually adhere, and tooth part is installed on wire holder and protrudes wire holder, to be connected with yoke part, winding coil is wound on wire holder, and wire holder is made of insulating material. The independent wire holder is set as the winding carrier of winding coil in the application, to adapt the winding mode of outer rotor winding machine, solve the low problem of winding winding coil efficiency of inner rotor winding machine, winding winding coil on wire holder through outer rotor winding machine, need not reserve additional space for the movement of inner rotor winding mechanism, and at the same time, the number of turns of winding coil is avoided to occupy the inside space of stator core when winding winding coil by using inner rotor winding mechanism.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to motor stators and motors. Background Technology

[0002] A permanent magnet synchronous motor is a synchronous motor that uses permanent magnets to generate a magnetic field. Its rotor speed is consistent with the current frequency of the stator winding. According to the rotor position, it can be divided into permanent magnet synchronous internal rotor motors and permanent magnet synchronous external rotor motors. Permanent magnet synchronous internal rotor motors have a small rotor diameter and low inertia, and fast acceleration and deceleration response speed. They can quickly track changes in the stator magnetic field, so they are often used in scenarios that require precise speed control and high-frequency start and stop.

[0003] The stator core of an internal rotor motor is composed of multiple stacked iron chips. Each iron chip includes an integrally formed annular yoke and T-shaped teeth. Multiple teeth are evenly spaced on the inner wall of the annular yoke. When winding the coil onto the stator core of an internal rotor motor, an internal rotor winding mechanism is needed to mechanically wind the coil onto the stator core. However, during the winding process, the hooks and related components of the internal rotor winding mechanism occupy space within the stator core as they move up and down with the enameled wire. This reduces the number of turns the coil can be wound around the stator core. Furthermore, the hooks and related components constrain the space design of the stator core, posing a significant challenge to the design and final production of compact, micro-motors. In addition, the efficiency of using an internal rotor winding mechanism to wind the coil onto the stator core is relatively low, affecting the motor's production efficiency.

[0004] Therefore, existing technologies still need to be improved and enhanced. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a motor stator and motor, which aims to solve the problem of poor winding effect of stator core winding coil in the prior art of internal rotor motor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An electric motor stator includes a stator core, winding coils, and a wire frame. The stator core is formed by stacking multiple iron laminations. Each iron lamination includes a toothed portion and a yoke portion. Two wire frames are disposed opposite each other inside the stator core along the length direction of the iron laminations, and the wire frames are in close contact with the stator core. The teeth are mounted on the wire frames and extend out of the wire frames to connect with the yoke portions. The winding coils are wound on the wire frames, and the wire frames are made of the insulating material.

[0007] The yoke includes two oppositely arranged yoke splicing units, and the teeth are mounted on the wire frame and extend out of the wire frame to connect the two ends of the two yoke splicing units.

[0008] The wire frame includes a winding section for winding the winding coil. The winding section has a hollow structure so that one end of the toothed part extends out of the wire frame to connect the two ends of the two yoke splicing units.

[0009] The outer end opening of the winding portion extends outward to form an outer baffle, and the inner end opening of the winding portion extends outward to form an inner baffle. The outer baffle, the winding portion, and the inner baffle define the winding space to limit the position of the winding coil.

[0010] The edge of the outer baffle bends and extends inward toward the wire frame in its height direction to form a guide plate. The guide plate and the inner baffle define the winding opening so that the winding coil can enter the winding space along the winding opening and be wound on the winding part during the winding process.

[0011] The iron chip has two straight sidewalls opposite each other in its width direction. Each straight sidewall extends to form two guide portions. The guide portions are formed by extending from the straight sidewall toward the center of the iron chip and bending toward the toothed side near the guide portion.

[0012] The two guide portions and the yoke portion, which are arranged opposite to each other on the two straight sidewalls, define a receiving space for accommodating the wire frame.

[0013] One end of the tooth connects the ends of the two yoke splicing units along the circumference of the iron chip, and the other end of the tooth is provided with a pole shoe on the side away from the yoke.

[0014] At least one yoke provided on the side of the iron chip near the motor output end is a yoke sealed circumferentially along the iron chip, and the teeth are connected to the inner wall of the sealed yoke.

[0015] An electric motor includes: the stator; and a rotor located inside the stator.

[0016] Compared to existing technologies, this utility model provides a motor stator and a motor. The motor stator includes a stator core, winding coils, and a wire frame. The stator core is formed by stacking multiple iron laminations. Each iron lamination includes a toothed portion and a yoke portion. Two wire frames are arranged opposite each other inside the stator core along the length direction of the iron laminations, and the wire frames are in close contact with the stator core. The teeth are mounted on the wire frames and extend out of the wire frames to connect with the yoke portions. The winding coils are wound around the wire frames, and the wire frames are made of the insulating material. In this application, the teeth are first mounted on the wire frames, then the winding coils are wound on the wire frames using an external rotor winding machine, and finally the wire frames are placed inside the stator core, connecting the teeth to the yoke portions. By setting up an independent wire frame as the winding carrier for the winding coil, and adapting it to the winding method of the external rotor winding machine, the mechanization and automation advantages of the external rotor winding machine are reused, solving the problem of low winding efficiency of the internal rotor winding machine. By winding the winding coil on the wire frame of the external rotor winding machine, there is no need to reserve extra space for the movement of the internal rotor winding mechanism, which helps to reduce the volume of the stator core. At the same time, it avoids the impact on the number of turns of the winding coil caused by occupying the internal space of the stator core when using the internal rotor winding mechanism to wind the winding coil. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the motor provided by this utility model.

[0018] Figure 2 A cross-sectional view of the motor provided by this utility model.

[0019] Figure 3 An exploded view of the motor provided for this utility model.

[0020] Figure 4 This is a structural schematic diagram of the stator core and wire frame provided by this utility model.

[0021] Figure 5 This is a schematic diagram of the stator core provided by this utility model.

[0022] Figure 6 This is a schematic diagram of the wire frame provided by this utility model at one angle.

[0023] Figure 7 This is a structural schematic diagram of the wire frame provided by this utility model from another angle.

[0024] Attached icon number Stator core 1, wire frame 2, winding section 21, outer baffle 22, inner baffle 23, guide plate 24, winding opening 25, iron chip 3, tooth section 31, pole shoe 311, yoke section 32, yoke splicing unit 321, straight side wall 322, guide section 323, motor housing 4, motor cover 41, limiting section 42, rotor 5. Detailed Implementation

[0025] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0026] It should be noted that when a component is referred to as being "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or may have an intervening component present.

[0027] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of this utility model are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0028] A permanent magnet synchronous motor is a synchronous motor that uses permanent magnets to generate a magnetic field. Its rotor speed is consistent with the current frequency of the stator winding. According to the rotor position, it can be divided into permanent magnet synchronous internal rotor motors and permanent magnet synchronous external rotor motors. Permanent magnet synchronous internal rotor motors have small rotor diameter and low inertia, fast acceleration and deceleration response speed, and can quickly track changes in the stator magnetic field. Therefore, they are often used in scenarios that require precise speed control and high-frequency start and stop.

[0029] The stator core of an internal rotor motor is composed of multiple stacked iron chips. Each iron chip includes an integrally formed annular yoke and T-shaped teeth. Multiple teeth are evenly spaced on the inner wall of the annular yoke. When winding the coil onto the stator core of an internal rotor motor, an internal rotor winding mechanism is needed to mechanically wind the coil onto the stator core. However, during the winding process, the hooks and related components of the internal rotor winding mechanism occupy space within the stator core as they move up and down with the enameled wire. This reduces the number of turns the coil can be wound around the stator core. Furthermore, the hooks and related components constrain the space design of the stator core, affecting its volume and posing a significant challenge to the design and final production of compact, micro-motors. In addition, the efficiency of using an internal rotor winding mechanism to wind the coil onto the stator core is relatively low, impacting the motor's production efficiency.

[0030] Existing technology, such as application number CN202010992423.1, entitled "An Automatic Rotor Winding Machine," is used to wind winding coils on the stator core of an external rotor motor. It can improve upon the shortcomings of internal rotor winding mechanisms. However, the winding method of the aforementioned existing external rotor winding machine cannot be adapted to the stator core of current internal rotor motors to form the motor stator. This utility model proposes a motor stator and a motor, enabling the stator core of an internal rotor motor to be adapted to an external rotor winding machine for winding winding coils to form the motor stator. It should be noted that both external rotor winding machines and internal rotor winding machines are existing technologies, and their structure and principles will not be described in detail here.

[0031] This utility model provides a motor stator; please refer to [link / reference]. Figures 1-7 The device includes a stator core 1, winding coils, and a wire frame 2. The stator core 1 is formed by stacking multiple iron chips 3. Each iron chip 3 includes a toothed portion 31 and a yoke portion 32. Two wire frames 2 are arranged opposite each other inside the stator core 1 along the length direction of the iron chip 3, and the wire frames 2 are in close contact with the stator core 1. The toothed portion 31 is mounted on the wire frame 2 and extends out of the wire frame 2 to connect with the yoke portion 32. The winding coil is wound on the wire frame 2, and the wire frame 2 is made of the insulating material. In this application, the toothed portion 31 is first mounted on the wire frame 2, then the winding coil is wound on the wire frame 2 by an external rotor winding machine, and finally the wire frame 2 is placed inside the stator core 1 so that the toothed portion 31 connects with the yoke portion 32. By setting up an independent wire frame 2 as the winding carrier for the winding coil, the winding method of the external rotor winding machine is adapted to the external rotor winding machine. This reuses the mechanization and automation advantages of the external rotor winding machine and solves the problem of low winding efficiency of the internal rotor winding machine. By winding the winding coil on the wire frame 2 of the external rotor winding machine, there is no need to reserve extra space for the movement of the internal rotor winding mechanism, which helps to reduce the volume of the stator core 1. At the same time, it avoids the impact on the number of turns of the winding coil caused by occupying the internal space of the stator core 1 when using the internal rotor winding mechanism to wind the winding coil.

[0032] Furthermore, the yoke 32 includes two oppositely arranged yoke splicing units 321, and the toothed part 31 is mounted on the wire frame 2 and extends out of the wire frame 2 to connect the two ends of the two yoke splicing units 321.

[0033] In this embodiment, the yoke 32 is designed as two opposing yoke splicing units 321. The toothed part 31 is mounted on the wire frame 2 and extends out of the wire frame 2 between the two ends of the two yoke splicing units 321 to connect the two yoke splicing units 321. This spliced ​​yoke 32, in conjunction with the wire frame 2, allows for flexible adjustment of the spacing between the two yoke splicing units 321 according to the installation requirements of the wire frame 2 and the winding coil, which can better adapt to the installation of winding coils with different numbers of turns. On the other hand, the spliced ​​design makes the processing and assembly of the yoke 32 more convenient. Especially in the production of micro motors, it can reduce the processing difficulty of the integral yoke 32, and at the same time facilitate the subsequent assembly of the stator core 1 with the wire frame 2 and the winding coil, improve production efficiency, and reduce the design and assembly constraints caused by the integral yoke 32 structure.

[0034] Furthermore, the wire frame 2 includes a winding portion 21 for winding the winding coil. The winding portion 21 has a hollow structure so that one end of the toothed portion 31 extends out of the wire frame 2 to connect the two ends of the two yoke splicing units 321.

[0035] In this embodiment, the winding section 21 is configured as a hollow structure, providing a channel for the toothed section 31 to penetrate the wire frame 2. This allows one end of the toothed section 31 to extend out of the wire frame 2 and connect to the two yoke splicing unit 321, eliminating the need for additional space reserved outside the wire frame 2 for the toothed section 31 installation and reducing the overall volume of the stator. After the toothed section 31 extends out of the winding section 21, it connects with the two yoke splicing unit 321, forming a complete magnetic circuit closure between the toothed section 31 and the yoke 32 of the stator core 1, reducing magnetic field leakage and improving the magnetic permeability efficiency of the motor. This structure of the winding section 21, while accommodating the toothed section 31, also provides internal support for the winding section 21 through multiple overlapping toothed sections 31, preventing deformation of the winding section 21 due to stress during coil winding and improving the structural stability of the wire frame 2.

[0036] Furthermore, the outer end opening of the winding portion 21 extends outward to form an outer baffle 22, and the inner end opening of the winding portion 21 extends outward to form an inner baffle 23. The outer baffle 22, the winding portion 21, and the inner baffle 23 define the winding space to limit the position of the winding coil.

[0037] In this embodiment, the outer baffle 22 and the inner baffle 23 form limiting positions on both sides of the winding coil, precisely constraining the winding coil within the winding space. This effectively prevents the winding coil from axially shifting or loosening along the winding section 21 during winding or motor operation, ensuring the neatness and stability of the winding coil arrangement, and reducing frictional losses and the risk of local overheating. At the same time, the outer baffle 22 and the inner baffle 23 prevent the winding coil from directly contacting and rubbing against the stator core 1, reducing wear on the winding coil, extending its service life, and improving the reliability and stability of motor operation.

[0038] Furthermore, the edge of the outer baffle 22 bends and extends inward toward the wire frame 2 in its height direction to form a guide plate 24. The guide plate 24 and the inner baffle 23 define a winding opening 25 so that the winding coil can enter the winding space along the winding opening 25 and be wound on the winding part 21 during the winding process.

[0039] In this embodiment, the winding opening 25 is configured as a clear guiding channel for the winding coil to enter the winding space. When the winding coil is pulled, it can smoothly enter the winding space along the guide plate 24 without the need for precise alignment with the winding opening 25, thus reducing the risk of jamming and wire breakage during winding. At the same time, the guiding effect of the guide plate 24 reduces the difficulty of winding the winding coil onto the winding part 21. That is, even in the narrow winding space of a compact motor, the winding efficiency can be improved, ensuring that the winding coil is smoothly wound onto the winding part 21, reducing the scrap rate during the winding process, and improving production efficiency and the winding quality of the winding coil.

[0040] Furthermore, the iron chip 3 has two straight sidewalls 322 disposed opposite to each other in its width direction, and two guide portions 323 are formed by extending the straight sidewall 322 on one side. The guide portion 323 is formed by extending the straight sidewall 322 toward the center of the iron chip 3 and bending toward the tooth portion 31 near the guide portion 323.

[0041] In this embodiment, the guide portion 323 extends from the flat sidewall 322 toward the center of the iron chip 3 and bends toward itself (the guide portion 323). Two guide portions 323 are provided on each flat sidewall 322, and two oppositely arranged guide portions 323 form a group. Each group of guide portions 323 bends toward the toothed portion 31 on the same side. When assembling the wire frame 2, a group of guide portions 323 can guide the wire frame 2 to quickly align with the installation position inside the stator core 1, avoiding collisions and misalignments between the wire frame 2 and the sidewall of the stator core 1, reducing assembly adjustment time, and improving assembly efficiency. The guide portion 323 is integrally formed from the iron chip 3, which is equivalent to adding reinforcing ribs to the sidewall of the iron chip 3. This improves the deformation resistance of the iron chip 3 (and the stacked stator core 1) in the width direction, preventing deformation of the sidewall of the iron chip 3 due to vibration during motor operation, thus affecting the stability of the wire frame 2 and the winding coil. The guide portion 323 bends toward the tooth portion 31 to avoid extending to the front end of the tooth portion 31 and affecting the magnetic flux of the tooth portion 31, so that the magnetic field can be transmitted more smoothly inside the stator, reducing magnetic loss and improving the energy efficiency and output performance of the motor.

[0042] Furthermore, the two guide portions 323 and the yoke portion 32, which are arranged opposite to each other on the two straight sidewalls 322, define a receiving space for accommodating the wire frame 2.

[0043] In this embodiment, the shape of the accommodating space is adapted to the shape of the wire frame 2, ensuring that the wire frame 2 can be accurately and stably installed inside the stator core 1, guaranteeing the fit between the wire frame 2 and the stator, and making full use of the internal space of the stator. After the wire frame 2 is installed into the stator core 1, it can be limited from the periphery by the guide part 323 and the yoke part 32, preventing the wire frame 2 from shifting inside the stator core 1, ensuring the relative position stability of the wire frame 2, the yoke part 32, and the tooth part 31, thereby ensuring the consistency of the electromagnetic performance after the coil is wound. In addition, the wire frame 2 can be limited by the guide part 323 and the yoke part 32 of the iron chip 3 itself, without the need for additional limiting structures, reducing production and assembly costs, and avoiding interference of additional limiting structures with the stator magnetic circuit.

[0044] Furthermore, one end of the toothed portion 31 connects the ends of the two yoke splicing units 321 along the circumference of the iron chip 3, and the other end of the toothed portion 31 is provided with a pole shoe 311 on the side away from the yoke 32.

[0045] In this embodiment, the two ends of the two yoke splicing unit 321 are connected to the tooth 31 by adhesive bonding, welding or high-temperature fusion, thereby realizing the connection and forming of the iron chip 3; the setting of the pole shoe 311 increases the corresponding area between the end of the tooth 31 and the rotor permanent magnet, reduces magnetic flux leakage, and enhances the excitation effect of the motor. Especially in scenarios that require precise speed control and high-frequency start and stop, it can improve the response speed and running stability of the motor and better meet the usage requirements of the internal rotor motor.

[0046] Further, at least one yoke 32 provided on the side of the iron chip 3 near the motor output end is a yoke 32 that is circumferentially sealed along the iron chip 3, and the tooth 31 is connected to the inner wall of the sealed yoke 32. In an optional embodiment, the eight yokes 32 provided on the side of the iron chip 3 near the motor output end are yokes that are axially sealed along the iron chip 3, and the tooth 32 is mounted on the wire frame 2 and contacts the inner wall of the sealed yoke. It should be noted that the two yoke splicing units 321 connecting the circumferentially sealed yoke 32 and the tooth 31 are identical in shape and size in the circumferential direction. This utility model also provides a motor, including: the stator; and a rotor 5, the rotor 5 being located inside the stator. The motor also includes a motor housing 4, the stator being installed inside the motor housing 4. One end of the motor housing 4 is open, and a motor cover 41 is provided on the opening. The other end of the motor housing 4 is provided with a shaft hole for the rotor 5 to extend out. Two limiting portions 42 are provided on the inner wall of the motor housing 4 near the output end of the rotor 5, and are arranged opposite each other on the arc-shaped inner wall of the motor housing 4. The limiting portions 42 and the motor cover 41 define the position of the stator inside the motor housing 4.

[0047] In summary, this utility model provides a motor stator and a motor. The motor stator includes a stator core, winding coils, and a wire frame. The stator core is formed by stacking multiple iron laminations. Each iron lamination includes a toothed portion and a yoke portion. Two wire frames are arranged opposite each other inside the stator core along the length direction of the iron laminations, and the wire frames are in close contact with the stator core. The teeth are mounted on the wire frames and extend out of the wire frames to connect with the yoke portions. The winding coils are wound around the wire frames, and the wire frames are made of the insulating material. In this application, the teeth are first mounted on the wire frames, then the winding coils are wound on the wire frames using an external rotor winding machine, and finally the wire frames are placed inside the stator core, connecting the teeth to the yoke portions. By setting up an independent wire frame as the winding carrier for the winding coil, and adapting it to the winding method of the external rotor winding machine, the mechanization and automation advantages of the external rotor winding machine are reused, solving the problem of low winding efficiency of the internal rotor winding machine. By winding the winding coil on the wire frame of the external rotor winding machine, there is no need to reserve extra space for the movement of the internal rotor winding mechanism, which helps to reduce the volume of the stator core. At the same time, it avoids the impact on the number of turns of the winding coil caused by occupying the internal space of the stator core when using the internal rotor winding mechanism to wind the winding coil.

[0048] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A motor stator, characterized in that, The device includes a stator core, winding coils, and a wire frame. The stator core is formed by stacking multiple iron laminations. Each iron lamination includes a toothed portion and a yoke. Two wire frames are arranged opposite each other inside the stator core along the length direction of the iron laminations, and the wire frames are in close contact with the stator core. The teeth are mounted on the wire frames and extend out of the wire frames to connect with the yokes. The winding coils are wound on the wire frames, and the wire frames are made of insulating material.

2. The motor stator according to claim 1, characterized in that, The yoke includes two oppositely arranged yoke splicing units, and the teeth are mounted on the wire frame and extend out of the wire frame to connect the two ends of the two yoke splicing units.

3. The motor stator according to claim 2, characterized in that, The wire frame includes a winding section for winding the winding coil. The winding section has a hollow structure so that one end of the toothed part extends out of the wire frame to connect the two ends of the two yoke splicing units.

4. The motor stator according to claim 3, characterized in that, The outer end opening of the winding portion extends outward to form an outer baffle, and the inner end opening of the winding portion extends outward to form an inner baffle. The outer baffle, the winding portion, and the inner baffle define the winding space to limit the position of the winding coil.

5. The motor stator according to claim 4, characterized in that, The edge of the outer baffle bends and extends inward toward the wire frame in its height direction to form a guide plate. The guide plate and the inner baffle define the winding opening so that the winding coil can enter the winding space along the winding opening and be wound on the winding part during the winding process.

6. The motor stator according to claim 1, characterized in that, The iron chip has two straight sidewalls opposite each other in its width direction. Each straight sidewall extends to form two guide portions. The guide portions are formed by extending from the straight sidewall toward the center of the iron chip and bending toward the toothed side near the guide portion.

7. The motor stator according to claim 6, characterized in that, The two guide portions and the yoke portion, which are arranged opposite to each other on the two straight sidewalls, define a receiving space for accommodating the wire frame.

8. The motor stator according to claim 2, characterized in that, One end of the tooth connects the ends of the two yoke splicing units along the circumference of the iron chip, and the other end of the tooth is provided with a pole shoe on the side away from the yoke.

9. The motor stator according to claim 1, characterized in that, At least one yoke provided on the side of the iron chip near the motor output end is a yoke sealed circumferentially along the iron chip, and the teeth are connected to the inner wall of the sealed yoke.

10. An electric motor, characterized in that, include: The stator as described in any one of claims 1-9; The rotor is located inside the stator.

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