Enclosed slot energy saving permanent magnet synchronous motor

Abstract

This application relates to an energy-saving permanent magnet synchronous motor with enclosed slots, belonging to the technical field of motors. The motor includes a housing, a stator, a rotor, and a shaft. The stator is coaxially inserted into the housing and coaxially sleeved on the outside of the rotor, with the stator and rotor spaced apart. The shaft is coaxially inserted into the rotor and fixedly connected to the shaft, with both ends of the shaft rotatably connected to the housing. The stator includes a core ring with several winding teeth on its outer side. One end of each winding tooth is connected to the core ring, and the other end extends radially away from the core ring. A coil is wound on each winding tooth. The stator also includes a slotted ring coaxially sleeved on the outside of the core ring. The winding teeth are located between the slotted ring and the core ring, and the end of the winding tooth away from the core ring is detachably connected to the slotted ring. This application can reduce the winding difficulty of the coil on the enclosed slot structure stator and improve the motor production efficiency.

Description

Technical Field

[0001] This application relates to the technical field of electric motors, and in particular to a closed-slot energy-saving permanent magnet synchronous motor. Background Technology

[0002] With increasing global demands for energy conservation and emission reduction, high-efficiency, high-power-density permanent magnet synchronous motors have become core power components in cutting-edge technology fields such as new energy vehicles and industrial automation. In the research and development and production of permanent magnet synchronous motors, the stator, as a key component, plays a decisive role in the overall energy efficiency, performance, and production cost of the motor due to its structural design and manufacturing process.

[0003] Currently, most motor stators adopt an open slot structure. The open slot structure facilitates coil winding. However, if the slot width of the open slot structure is too large, it will cause drastic changes in the air gap magnetic permeability inside the motor, thereby generating uneven magnetic field harmonics. The uneven magnetic field harmonics will induce large eddy currents in the rotor permanent magnet, resulting in severe eddy current losses and heat generation in the rotor. This not only reduces the overall efficiency of the motor, but also poses a risk of demagnetization of the permanent magnet due to overheating.

[0004] Due to the existence of problems with open slot stators, some existing motors adopt closed slot structures, also known as closed-end slot structures. Closed slot structures can make the air gap magnetic field distribution smoother and more uniform, significantly reducing the tooth harmonic components in the magnetic field. Therefore, they can effectively suppress eddy current losses in the rotor permanent magnets, making them an ideal technical path to achieve high efficiency and energy saving in motors.

[0005] Regarding the aforementioned technologies, although the closed slot structure has significant performance advantages, most existing closed slot stators are made by directly stacking silicon steel sheets with stamped closed slots. As a result, the completely closed slots make it extremely difficult to wind the coils on the stator, which leads to low stator production efficiency and consequently reduces motor production efficiency. Summary of the Invention

[0006] The purpose of this application is to provide an energy-saving permanent magnet synchronous motor with enclosed slots, which aims to reduce the winding difficulty of the coils on the stator of the enclosed slot structure, thereby increasing the production efficiency of the stator and thus improving the production efficiency of the motor.

[0007] The closed-slot energy-saving permanent magnet synchronous motor provided in this application adopts the following technical solution:

[0008] An energy-saving permanent magnet synchronous motor with enclosed slots includes a housing, a stator, a rotor, and a shaft. The stator is coaxially inserted into the housing and coaxially sleeved on the outside of the rotor, with the stator and rotor spaced apart. The shaft is coaxially inserted into the rotor and fixedly connected to the shaft, with both ends of the shaft rotatably connected to the housing. The stator includes a core ring with a plurality of winding teeth on its outer side. One end of each winding tooth is connected to the core ring, and the other end extends radially away from the core ring. A coil is sleeved on each winding tooth. The stator also includes a sealing ring coaxially sleeved on the outside of the core ring. The winding teeth are located between the sealing ring and the core ring, and the end of each winding tooth away from the core ring is detachably connected to the sealing ring.

[0009] By adopting the above technical solutions, the coordinated arrangement of the housing, stator, rotor, and shaft enables the basic functions of the motor to be realized.

[0010] Based on this, the stator is configured with a core ring and winding teeth to allow the coil to be wound on the winding teeth. Since there is no obstruction between the slots of two adjacent winding teeth, it is convenient to wind the coil.

[0011] A sealing ring is coaxially sleeved on the outside of the core ring, and the winding teeth are located between the sealing ring and the core ring. The winding teeth and the sealing ring are detachably connected. Therefore, after the coil is wound on the winding teeth, a sealing ring can be coaxially sleeved on the outside of the core ring to close the slot between two adjacent winding teeth, thus forming a stator with a closed slot structure.

[0012] Therefore, the stator, through the combination of a core ring, a slot sealing ring, several winding teeth, and several coils, initially has an open slot structure, which facilitates coil winding. Then, the slot sealing ring is added, ultimately transforming the stator into a closed slot structure, thereby improving the motor's operating efficiency. This reduces the winding difficulty of coils on a closed slot stator, thus increasing stator production efficiency and consequently, motor production efficiency.

[0013] Optionally, the winding teeth are detachably connected to the core ring.

[0014] By adopting the above technical solution, since the winding teeth and the iron core ring, as well as the winding teeth and the sealing ring, can be detachably connected, each winding tooth can become an independent modular unit, and the winding of the coil can be carried out directly on the corresponding independent winding teeth. This can eliminate the interference of the iron core ring on the coil winding, thereby further improving the convenience of coil winding.

[0015] Based on this structural design, on the one hand, since each winding tooth can be independently assembled and disassembled, it is easy to freely increase or decrease the number of winding teeth, that is, to freely increase or decrease the number of coils in the stator, which improves the applicability of the stator. On the other hand, when a coil is damaged, the corresponding winding tooth can be directly removed and replaced with a new winding tooth and coil, which improves the efficiency of stator maintenance.

[0016] Optionally, the winding teeth are provided with a first insertion wing on the side facing the core ring, and the outer wall of the core ring is provided with a plurality of first insertion slots. The first insertion slots penetrate the core ring along the axial direction of the core ring. The first insertion wing is provided in a one-to-one correspondence with the first insertion slot, and the first insertion wing is inserted into the corresponding first insertion slot. The winding teeth are provided with a second insertion wing on the side facing the sealing ring, and the inner wall of the sealing ring is provided with a plurality of second insertion slots. The second insertion slots penetrate the sealing ring along the axial direction of the sealing ring. The second insertion wing is provided in a one-to-one correspondence with the second insertion slot, and the second insertion wing is inserted into the corresponding second insertion slot.

[0017] By adopting the above technical solution, the detachable connection between the winding teeth and the core ring is achieved through the cooperation of the first insertion wing and the first insertion slot; and the detachable connection between the winding teeth and the sealing ring is achieved through the cooperation of the second insertion wing and the second insertion slot. Therefore, with the cooperation of the first insertion wing, the second insertion wing, the first insertion slot, and the second insertion slot, a sequential detachable connection between the core ring, the winding teeth, and the sealing ring is achieved. At the same time, this structural design can improve the convenience of stator assembly.

[0018] Optionally, the winding teeth are provided with two limiting wings, the limiting wings are spaced apart along the axial direction of the coil, the coil is located between the two limiting wings along its own axial direction, and the two ends of the coil respectively abut against the corresponding limiting wings.

[0019] By adopting the above technical solution, two limiting wings are provided on the winding teeth. These two limiting wings cooperate to limit the coil, thus preventing the coil wound on each independently positioned winding tooth from falling off. Simultaneously, the two limiting wings also increase the stability of the connection between the coil and the corresponding winding tooth, preventing axial movement or loosening of the coil during winding, stator assembly, or motor operation, protecting the enameled wire insulation layer of the coil, and ensuring the regularity and stability of the coil formation. Therefore, the cooperative arrangement of the two limiting wings ensures the integrity and stability of the coil on the winding teeth.

[0020] Optionally, the stator further includes a reinforcement assembly, which includes two end sealing rings, the two end sealing rings being coaxially spaced apart; the end sealing rings are coaxially arranged with the core ring, the core ring and the sealing groove ring are both located between the two end sealing rings, and both ends of the core ring are respectively connected to the corresponding end sealing ring, and both ends of the sealing groove ring are respectively connected to the corresponding end sealing ring.

[0021] By adopting the above technical solution, the reinforcement component is configured with two end sealing rings. Since the core ring and the slotted ring are located between the two end sealing rings, and each end sealing ring is simultaneously connected to the end face of the core ring and the slotted ring, the two end sealing rings can seal the space between the core ring and the slotted ring, thereby preventing the winding teeth from detaching from the core ring and the slotted ring. This can improve the stability of the connection between the core ring, the slotted ring, and several winding teeth, and thus improve the stability of the entire stator structure. This can enhance the stator's ability to resist vibration and impact under complex working conditions.

[0022] Optionally, the reinforcement assembly further includes a plurality of reinforcing posts, which are located between the two end sealing rings and are respectively connected at both ends to the corresponding end sealing rings; the core ring, the sealing groove ring, and the winding teeth are all provided with a plurality of reinforcing holes, which are provided one-to-one with the reinforcing posts, and the reinforcing posts are coaxially inserted into the corresponding reinforcing holes.

[0023] By adopting the above technical solution, the reinforcement assembly is configured with two end sealing rings and several reinforcing columns. The two end sealing rings axially limit the core ring and the slotted ring, while preventing the winding teeth from disengaging. The reinforcing columns prevent circumferential rotation among the core ring, the slotted ring, and the winding teeth. Therefore, with the cooperation of the end sealing rings and reinforcing columns, the core ring, the slotted ring, and the winding teeth are integrated and locked, thereby enhancing the stability of the stator structure. At the same time, the cooperation of the reinforcing columns prevents relative torsion among the core ring, the slotted ring, and the winding teeth, which enhances the torsional and vibration resistance of the stator structure, ensuring uniform air gap and stable performance of the motor under high-speed and high-load conditions.

[0024] Optionally, both ends of the reinforcing column pass through the corresponding end sealing rings, and the end sealing rings are slidably connected to the reinforcing column along their own axial direction; both ends of the reinforcing column are screwed with reinforcing nuts, the two end sealing rings are located between the two reinforcing nuts, and the reinforcing nuts abut against the corresponding end sealing rings.

[0025] By adopting the above technical solution, since the two ends of the reinforcing column are slidably connected to the corresponding end sealing rings, and the two ends of the reinforcing column are screwed with reinforcing nuts, and the two end sealing rings are clamped between the two reinforcing nuts, when assembling the stator, by tightening the reinforcing nuts at both ends of the reinforcing column, the two end sealing rings can be brought closer to each other, thereby applying axial preload to the core ring, sealing ring, winding teeth and coil located between the two end sealing rings, thereby eliminating potential gaps between the internal structures of the stator and improving the stability of the stator structure.

[0026] Optionally, the winding teeth are provided with connecting wings, and a plurality of connecting wings are arranged sequentially at intervals along the circumference of the iron core ring, and adjacent two connecting wings are rotatably connected and detachably connected.

[0027] By adopting the above technical solution, based on the design of the connecting wing on the winding tooth, and the rotatable and detachable connection of two adjacent connecting wings, two adjacent winding teeth can be rotatably and detachably connected. This allows several winding teeth to be pre-assembled into a flexible chain structure, and then the ends of this chain structure are connected together, so that several winding teeth are connected in series to form a ring structure. This allows the entire ring structure to be installed between the core ring and the sealing ring. Since several winding teeth are connected in series to form a ring structure, they can be inserted between the core ring and the sealing ring in one go, which can reduce the time for picking up and removing winding teeth, thereby greatly simplifying the assembly process, significantly shortening the assembly time, and thus greatly improving the overall production efficiency of the stator.

[0028] Optionally, a magnetic shielding component is provided between two adjacent connecting wings, and the magnetic shielding component is rotatably and detachably connected to the corresponding connecting wing on opposite sides.

[0029] By adopting the above technical solution, a magnetic shielding component is provided between two adjacent connecting wings. Since the magnetic shielding component is rotatably and detachably connected to the corresponding connecting wings on its opposite sides, the requirement of rotatable and detachable connection between two adjacent connecting wings can be achieved.

[0030] Based on this, since the magnetic shielding component itself has a magnetic shielding function, it can block the circumferential leakage flux path that may be formed between two adjacent winding teeth. This can effectively isolate the leakage flux between the teeth, so that the magnetic flux can be more concentrated and flow along the winding teeth, reducing stray losses, optimizing the magnetic field distribution, and improving the effective torque and operating efficiency of the motor.

[0031] Optionally, the magnetic shielding component has a first plate on the side facing the connecting wing, and the connecting wing has a second plate on the side facing the magnetic shielding component. The first plate and the second plate are directly opposite each other along the axial direction of the iron core ring. A first hole is formed through the first plate, and a second hole is formed on the second plate. The first hole and the second hole are coaxially arranged. A rotating column is provided between the magnetic shielding component and the connecting wing. The rotating column is coaxially inserted and engaged with the first hole and the second hole, and both the first plate and the second plate are rotatably connected to the rotating column.

[0032] By adopting the above technical solution, based on the cooperative arrangement of the first plate, the second plate, and the rotating column, when the rotating column is inserted into the first hole and the second hole, a rotatable connection between the first plate and the second plate is achieved, thus realizing a rotatable connection between the magnetic shielding component and the corresponding connecting wing. Because the rotating column is inserted into the first hole and the second hole, the first plate and the second plate can be separated when the rotating column is withdrawn, thereby achieving a detachable connection between the magnetic shielding component and the corresponding connecting wing. Therefore, the cooperative arrangement of the first plate, the second plate, and the rotating column enables the connection between the magnetic shielding component and the corresponding connecting wing.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. This application improves the motor's operating efficiency and reduces the production efficiency by designing the stator structure into a closed-slot structure.

[0035] 2. Through the structural design of the stator, this application allows the core ring and the sealing ring to be detachably connected to the winding teeth. This enables the number of coils inside the stator to be freely increased or decreased, thereby improving the applicability of the stator and facilitating the replacement of new coils, thus improving the convenience of stator maintenance.

[0036] 3. This application improves the stability of the stator structure through the design of the reinforcement components, thereby enhancing the stator's ability to resist vibration and impact under complex working conditions.

[0037] 4. This application, through the cooperative design of the connecting wing on the winding teeth and the magnetic shielding component, enables several winding teeth to be pre-connected, and then the connected winding teeth can be inserted between the iron core ring and the sealing ring at one time. This reduces the time for picking up the winding teeth, thereby greatly simplifying the assembly process, significantly shortening the assembly time, and thus greatly improving the overall production efficiency of the stator. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the motor in Embodiment 1 of this application.

[0039] Figure 2 This is a schematic diagram of the overall structure of the stator in Embodiment 1 of this application.

[0040] Figure 3 This is a cross-sectional structural schematic diagram of the stator of Embodiment 1 of this application.

[0041] Figure 4 This is a schematic diagram of the overall structure of the stator in Embodiment 2 of this application.

[0042] Figure 5 This is a schematic diagram of the exploded structure of the stator in Embodiment 2 of this application.

[0043] Figure 6 This is a schematic diagram of the internal structure of the stator in Embodiment 2 of this application.

[0044] Figure 7 This is a front view structural schematic diagram of the winding teeth in Embodiment 2 of this application.

[0045] Figure 8 This is a schematic diagram of the internal structure of the stator in Embodiment 3 of this application.

[0046] Figure 9 yes Figure 8 A magnified schematic diagram of part A in the middle.

[0047] Figure 10 This is a schematic diagram of the overall structure of several winding teeth connected in series in Embodiment 3 of this application.

[0048] Figure 11 yes Figure 10 A magnified schematic diagram of part B in the middle section.

[0049] Figure 12 This is a schematic diagram of the overall structure of the first plate in Embodiment 3 of this application.

[0050] In the diagram, 1. Outer shell; 2. Stator; 21. Core ring; 211. First insertion slot; 22. Winding teeth; 221. Limiting wing; 222. First insertion wing; 2221. Long wing section; 2222. Extension section; 223. Second insertion wing; 224. Connecting wing; 2241. Second plate; 2242. Second slot; 2243. Second hole; 23. Coil; 24. Sealing ring; 241. Second insertion slot; 25. Reinforcement. Components; 251, end sealing ring; 2511, mounting hole; 252, reinforcing column; 253, reinforcing hole; 254, reinforcing nut; 26, magnetic shielding component; 261, magnetic shielding long block; 2611, first plate; 2612, first groove; 2613, first hole; 2614, ejection groove; 2615, ejection long hole; 2616, anti-rotation square hole; 262, rotating column; 263, anti-rotation square rod; 3, rotor; 4, rotating shaft. Detailed Implementation

[0051] The following is in conjunction with the appendix Figure 1 - Appendix Figure 12 This application will be described in further detail below.

[0052] Example 1: An energy-saving permanent magnet synchronous motor with a closed slot, referring to... Figure 1 The device includes a housing 1, a stator 2, a rotor 3, and a shaft 4. The stator 2 is coaxially inserted into the housing 1 and coaxially sleeved on the outside of the rotor 3. The inner sidewall of the stator 2 and the outer sidewall of the rotor 3 are spaced apart. The rotor 3 is coaxially sleeved on the outside of the shaft 4 and the rotor 3 and the shaft 4 are fixedly connected. Both ends of the shaft 4 extend out of the housing 1 and the shaft 4 is rotatably connected to the housing 1.

[0053] Reference Figure 2 and Figure 3 The stator 2 includes a core ring 21. A plurality of winding teeth 22 are provided on the outer wall of the core ring 21. One end of each winding tooth 22 is fixedly connected to the core ring 21, and the other end extends radially away from the core ring 21. The plurality of winding teeth 22 are arranged at uniform intervals along the circumference of the core ring 21, and are arranged in a circular pattern.

[0054] Reference Figure 2 and Figure 3 The stator 2 also includes several coils 23, which are arranged in a one-to-one correspondence with the winding teeth 22, and the coils 23 are sleeved on the corresponding winding teeth 22.

[0055] The stator 2, through the coordinated design of the iron core ring 21, winding teeth 22, and coil 23, functions as a motor stator 2. After being energized, it generates a rotating electromagnetic field, thereby driving the rotor 3 to rotate and realizing the conversion of electrical energy into mechanical energy.

[0056] Reference Figure 2 and Figure 3 The stator 2 also includes a sealing ring 24, which is coaxially sleeved on the outside of the core ring 21. The inner wall of the sealing ring 24 is spaced apart from the outer wall of the core ring 21. Several winding teeth 22 are located between the core ring 21 and the sealing ring 24, and the end of the core ring 21 away from the core ring 21 abuts against the inner wall of the sealing ring 24.

[0057] Based on the design of the sealing ring 24, the sealing ring 24 can close the slot between two adjacent winding teeth 22, thereby forming a stator 2 with a fully enclosed slot structure.

[0058] Based on the fully enclosed slot structure design, during motor operation, the fully enclosed slot structure can effectively reduce tooth magnetic permeability harmonics and suppress armature ripple current and high-order harmonic current caused by high DC bus voltage frequency conversion power supply. Furthermore, the fully enclosed slot structure can significantly reduce the amplitude of high-order harmonics in the air gap magnetic flux density, thereby reducing eddy current losses in the permanent magnets within the rotor 3. Simultaneously, the leakage reactance of the motor with the fully enclosed slot structure is significantly reduced, thereby increasing the starting torque and improving the motor's operating efficiency. Therefore, based on the design of the slot sealing ring 24, the stator 2 forms a fully enclosed slot structure, thus eliminating unnecessary energy losses during motor operation and achieving energy-saving effects.

[0059] In this embodiment, refer to Figure 1 and Figure 3 The sealing ring 24 is coaxially inserted into the outer casing 1, and the outer side wall of the sealing ring 24 is connected to the inner side wall of the outer casing 1. The rotor 3 is coaxially inserted into the core ring 21, and the inner side wall of the core ring 21 and the outer side wall of the rotor 3 are spaced apart.

[0060] In this embodiment, refer to Figure 2 and Figure 3 A limiting wing 221 is provided at the end of the winding tooth 22 away from the core ring 21. The limiting wing 221 is arranged circumferentially along the core ring 21. The middle part of the limiting wing 221 along its own length direction is fixedly connected to the corresponding winding tooth 22. The side of the limiting wing 221 away from the core ring 21 abuts against the inner wall of the sealing ring 24, and several limiting wings 221 are arranged at intervals along the circumference of the core ring 21. One end of the coil 23 abuts against the limiting wing 221 along its own axial direction, and the other end abuts against the outer wall of the core ring 21.

[0061] The design of the limiting wing 221 provides support and positioning for the winding of the corresponding coil 23. In addition, during the winding process of the coil 23, the limiting wing 221 can effectively disperse and bear the winding tension of the enameled wire, avoiding the problem of damage to the slot insulation layer due to concentrated tension, thus enhancing the insulation performance and reliability of the stator 2.

[0062] In this embodiment, refer to Figure 2 and Figure 3 To ensure the stability of the stator 2 structure, the inner diameter of the sealing ring 24 is designed to be slightly smaller than the diameter of the circumscribed circle formed by the winding teeth 22. In this case, the sealing ring 24 is installed using an interference fit, which ensures the stability of the stator 2 structure. Furthermore, when it is necessary to increase the connection stability between the sealing ring 24 and the winding teeth 22, they can also be fixed by laser welding or adhesive bonding.

[0063] In this embodiment, refer to Figure 2 and Figure 3The iron core ring 21, the winding teeth 22 and the limiting wing 221 are integrally formed and made of several silicon steel sheets stacked together.

[0064] The implementation principle of this application embodiment is as follows: First, coils 23 are wound on several winding teeth 22; then, a sealing ring 24 is fitted on the outside of the iron core ring 21, so that the sealing ring 24 is clamped to the end of the several winding teeth 22 away from the iron core ring 21. At this time, the sealing ring 24, the iron core ring 21, the several winding teeth 22 and the several coils 23 are stably connected to form the stator 2, which satisfies the function of the stator 2 and thus the function of the motor. Before the sealing ring 24 is installed, the iron core ring 21 and the several winding teeth 22 form an open slot structure stator 2, which facilitates the winding of the coils; after the sealing ring 24 is installed, the sealing ring 24, the iron core ring 21 and the several winding teeth 22 form a closed slot structure stator 2, which can reduce the leakage reactance of the stator 2, improve the working efficiency of the motor, and at the same time reduce unnecessary power loss, thereby achieving energy saving effect.

[0065] Example 2: An energy-saving permanent magnet synchronous motor with a closed slot, referring to... Figure 4 and Figure 5 The difference between this embodiment and embodiment 1 is that one end of the winding tooth 22 is detachably connected to the iron core ring 21, and the other end is detachably connected to the sealing groove ring 24.

[0066] Reference Figure 6 and Figure 7 Since the winding teeth 22 are detachably connected to the core ring 21 and the slotting ring 24, each winding tooth 22 can become an independent modular unit. This allows the winding of the coil 23 to be performed directly on the corresponding independent winding tooth 22, eliminating the interference of the core ring 21 on the winding of the coil 23 and further improving the ease of winding the coil 23. Furthermore, the absence of interference from the core ring 21 and the slotting ring 24 during winding reduces the difficulty of winding the coil 23 on the winding teeth 22, thereby improving the working efficiency and consistency of coil 23 winding and also increasing the slot fill factor.

[0067] Based on this design, on the one hand, it allows for free selection of the number of winding teeth 22 installed, thereby allowing free selection of the number of coils 23 inside the stator 2, which improves the adaptability of the stator 2. On the other hand, when a coil 23 is damaged, the corresponding winding tooth 22 can be directly removed and replaced with a new winding tooth 22 and coil 23, which improves the maintenance efficiency of the stator 2.

[0068] Reference Figure 6 and Figure 7Two limiting wings 221 are provided on the winding tooth 22. Both limiting wings 221 are located between the iron core ring 21 and the sealing groove ring 24. The two limiting wings 221 are spaced apart along the axial direction of the corresponding coil 23, and the coil 23 is located between the two limiting wings 221. Both ends of the coil 23 abut against the corresponding limiting wings 221. The side of the limiting wing 221 away from the corresponding coil 23 abuts against the outer wall of the corresponding iron core ring 21 or the inner wall of the sealing groove ring 24.

[0069] By setting two limiting wings 221, a single winding tooth 22 cooperates with the two limiting wings 221 to form an I-shaped structure. This can limit the coil 23 wound on the winding tooth 22, preventing the coil 23 from falling off the winding tooth 22 and ensuring the stability of the independent unit structure composed of the winding tooth 22 and the coil 23. At the same time, the two limiting wings 221 provide more comprehensive support and protection for the coil 23, preventing axial movement or deformation of the coil 23 during assembly or motor operation, further improving the reliability of the stator 2.

[0070] Reference Figure 6 and Figure 7 The winding tooth 22 is also provided with a first insertion wing 222 and a second insertion wing 223. The length direction of the first insertion wing 222 and the second insertion wing 223 are both arranged along the circumference of the iron core ring 21. The first insertion wing 222 and the second insertion wing 223 are arranged in parallel and spaced apart. The spacing direction of the first insertion wing 222 and the second insertion wing 223 is arranged along the spacing direction of the two limiting wings 221. The coil 23 and the two limiting wings 221 are both located between the first insertion wing 222 and the second insertion wing 223.

[0071] Reference Figure 6 The outer wall of the core ring 21 has several first insertion slots 211, which penetrate the core ring 21 along its axial direction. These first insertion slots 211 are spaced apart sequentially along the circumference of the core ring 21. The inner wall of the sealing ring 24 has several second insertion slots 241, which penetrate the sealing ring 24 along its axial direction. These second insertion slots 241 are spaced apart sequentially along the circumference of the sealing ring 24.

[0072] Reference Figure 6 and Figure 7 The first insertion slot 211 and the first insertion wing 222 are set in a one-to-one correspondence, and the second insertion slot 241 and the second insertion wing 223 are set in a one-to-one correspondence. The first insertion wing 222 is inserted into the corresponding first insertion slot 211, and the second insertion wing 223 is inserted into the corresponding second insertion slot 241.

[0073] The first insertion wing 222 and the first insertion slot 211 are configured to achieve a detachable connection between the winding tooth 22 and the iron core ring 21; the second insertion wing 223 and the second insertion slot 241 are configured to achieve a detachable connection between the winding tooth 22 and the sealing ring 24.

[0074] In this embodiment, the winding tooth 22, the limiting wing 221, the first insertion wing 222 and the second insertion wing 223 are integrally formed.

[0075] In this embodiment, refer to Figure 6 The first plug-in wing 222 and the second plug-in wing 223 have the same structure. This embodiment will be described using the structure of the first plug-in wing 222 as an example.

[0076] Reference Figure 6 and Figure 7 The first insertion wing 222 includes a long wing portion 2221 and an extension portion 2222. The length of the long wing portion 2221 is arranged along the circumference of the iron core ring 21. One end of the extension portion 2222 is connected to the middle of the long wing portion 2221, and the other end is connected to the corresponding limiting wing 221. Both the extension portion 2222 and the long wing portion 2221 are inserted into the corresponding first insertion slot 211.

[0077] Based on the structural design of the first insertion wing 222, the extension 2222 and the long wing 2221 cooperate to form a T-shaped or dovetail-shaped structure. When the first insertion wing 222 is inserted into the first insertion slot 211, the long wing 2221 cooperates with the first insertion slot 211 to limit the movement, effectively resisting the radial electromagnetic force generated during motor operation and preventing the winding teeth 22 from dislodging from the core ring 21. This design not only ensures the stability of the connection, but also ensures the precise positioning of the winding teeth 22 after installation through the large-area contact between the extension 2222 and the long wing 2221, which is beneficial to ensuring the uniformity and consistency of the entire stator 2 magnetic circuit. Similarly, the second insertion wing 223 has the same function as the first insertion wing 222.

[0078] Reference Figure 4 and Figure 5 The stator 2 is also provided with a reinforcement component 25, which includes two end sealing rings 251. The two end sealing rings 251 are coaxially spaced apart. The core ring 21 is coaxially arranged with the end sealing rings 251. The core ring 21, the sealing groove ring 24, a number of winding teeth 22 and a number of coils 23 are all located between the two end sealing rings 251. The two ends of the core ring 21 are respectively connected to the corresponding end sealing rings 251, and the two ends of the sealing groove ring 24 are respectively connected to the corresponding end sealing rings 251.

[0079] Reference Figure 5 and Figure 7The first insertion wing 222 abuts against the corresponding end sealing ring 251 at both ends along the axial direction of the iron core ring 21, the second insertion wing 223 abuts against the corresponding end sealing ring 251 at both ends along the axial direction of the iron core ring 21, and the coil 23 abuts against the corresponding end sealing ring 251 on both sides along the axial direction of the iron core ring 21.

[0080] With the cooperation of the two end sealing rings 251, the core ring 21 and the sealing ring 24 are locked and sealed at both ends in the axial direction, forming a complete cage-like frame structure, which enhances the stability of the stator 2 structure. Furthermore, since each end sealing ring 251 connects both the core ring 21 and the sealing ring 24, the two end sealing rings 251 can seal the space between the core ring 21 and the sealing ring 24, preventing the coil 23 and the winding teeth 22 from detaching from the core ring 21 and the sealing ring 24, thereby further improving the stability of the stator 2 structure.

[0081] In this embodiment, the sealing ring 24 and the end sealing ring 251, as well as the iron core ring 21 and the corresponding end sealing ring 251, are all connected by welding or adhesive bonding.

[0082] In this embodiment, refer to Figure 5 and Figure 6 The reinforcement assembly 25 also includes several reinforcing posts 252. The length direction of the reinforcing posts 252 is arranged along the axial direction of the end sealing ring 251, and both ends of the reinforcing posts 252 are detachably connected to the corresponding end sealing rings 251. Several reinforcing holes 253 are provided on the core ring 21, the sealing groove ring 24, and the winding teeth 22. The reinforcing holes 253 penetrate the corresponding core ring 21, sealing groove ring 24, or winding teeth 22 along the axial direction of the core ring 21. The reinforcing holes 253 are arranged one-to-one with the reinforcing posts 252, and the reinforcing posts 252 are coaxially inserted into the corresponding reinforcing holes 253.

[0083] With the cooperation of two end sealing rings 251 and several reinforcing posts 252, the two end sealing rings 251 axially limit the core ring 21 and the grooved ring 24; the several reinforcing posts 252 can prevent circumferential rotation among the core ring 21, the grooved ring 24, and the several winding teeth 22. Therefore, with the cooperation of the end sealing rings 251 and the reinforcing posts 252, the core ring 21, the grooved ring 24, and the winding teeth 22 are locked together, thereby enhancing the stability of the stator 2 structure. At the same time, the cooperation of the several reinforcing posts 252 can also share torque and vibration, which can enhance the torsional and vibration resistance of the stator 2, ensuring that even under high-speed and high-load conditions, there will be no misalignment or relative movement among the core ring 21, the grooved ring 24, and the winding teeth 22 inside the stator 2, thus ensuring the uniformity of the air gap and the stability of the motor performance.

[0084] In this embodiment, refer to Figure 4 and Figure 5 The end sealing ring 251 has several mounting holes 2511. Reinforcing posts 252 are correspondingly arranged with each mounting hole 2511. Both ends of the reinforcing post 252 are inserted into the corresponding mounting holes 2511, and the reinforcing post 252 slides along its axial direction against the inner wall of the mounting hole 2511. Both ends of the reinforcing post 252 are coaxially fitted with reinforcing nuts 254, which are screwed onto the reinforcing post 252. Two end sealing rings 251 are located between the two reinforcing nuts 254 along the axial direction of the reinforcing post 252, and the reinforcing nuts 254 abut against the corresponding end sealing rings 251.

[0085] With the cooperation of the reinforcing column 252 and the reinforcing nut 254, a detachable connection between the reinforcing column 252 and the end sealing ring 251 is achieved. Furthermore, during stator 2 assembly, tightening the reinforcing nuts 254 at both ends of the reinforcing column 252 creates circumferential pressure on the two end sealing rings 251, thereby pressing the core ring 21, the sealing ring 24, and the winding teeth 22 together, thus improving the stability of the stator 2 structure. Simultaneously, the pressing of the core ring 21, the sealing ring 24, and the winding teeth 22 by the two end sealing rings 251 effectively eliminates physical gaps between the contact surfaces of the core ring 21, the sealing ring 24, and the winding teeth 22, ensuring a tight fit between them and forming a continuous, low-resistivity magnetic circuit. This minimizes magnetic leakage and magnetic resistance caused by assembly seams.

[0086] The implementation principle of this application embodiment is as follows: When assembling the stator 2, firstly, the coil 23 is pre-wound on the winding teeth 22. Secondly, the winding teeth 22 are installed between the core ring 21 and the sealing ring 24; then, the reinforcing column 252, the end sealing ring 251 and the reinforcing nut 254 are installed in sequence to lock the entire stator 2 structure.

[0087] Because the winding teeth 22 can be independently removed and installed between the core ring 21 and the sealing ring 24, the number of winding teeth 22 installed between the core ring 21 and the sealing ring groove can be freely selected, thereby allowing for the free selection of the number of coils 23 within the stator 2. This improves the adaptability of the stator 2 structure, enabling it to be used in different motors. Furthermore, when a coil 23 is damaged, the corresponding winding tooth 22 can be directly removed and replaced with a new winding tooth 22 and coil 23, eliminating the need to disassemble the entire stator 2 and thus improving the convenience of stator 2 maintenance.

[0088] Example 3, an energy-saving permanent magnet synchronous motor with enclosed slot, referring to... Figure 8 and Figure 9The difference between this embodiment and embodiment 2 is that: a connecting wing 224 is provided on the winding tooth 22. The connecting wing 224 is located between the first insertion wing 222 and the limiting wing 221 adjacent to the first insertion wing 222. The width direction of the connecting wing 224 is arranged along the interval direction between the first insertion wing 222 and the second insertion wing 223. The connecting wing 224 is located between the iron core ring 21 and the sealing groove ring 24. The connecting wing 224 is located between the corresponding coil 23 and the outer wall of the iron core ring 21.

[0089] Reference Figure 8 and Figure 9 A number of connecting wings 224 are arranged sequentially at intervals along the circumference of the iron core ring 21, and a magnetic shielding component 26 is provided between two adjacent connecting wings 224. The magnetic shielding component 26 is rotatably connected to the corresponding magnetic shielding component 26 on both sides and is detachably connected.

[0090] Reference Figure 9 and Figure 10 Based on the cooperative arrangement of the connecting wing 224 and the magnetic shielding component 26, on the one hand, the rotatable and detachable connection between the connecting wing 224 and the magnetic shielding component 26 allows several winding teeth 22 to be pre-assembled into a flexible chain structure. Then, the ends of this chain structure are connected, forming a ring structure. The entire string of winding teeth 22 is then installed between the core ring 21 and the sealing ring 24, which speeds up the stator 2 assembly. On the other hand, the magnetic shielding component 26 isolates adjacent winding teeth 22 on the magnetic circuit, effectively blocking the circumferential leakage flux between two adjacent winding teeth 22. This allows the magnetic flux to pass more concentratedly along the interior of the winding teeth 22, thereby optimizing the magnetic field distribution, reducing magnetic reluctance and stray losses, and further improving the motor's torque and efficiency.

[0091] Reference Figure 9 and Figure 11 The magnetic shielding component 26 includes a magnetic shielding elongated block 261, which is arranged along the axial direction of the iron core ring 21 in the length direction, and is located between two adjacent connecting wings 224 in the width direction. In this embodiment, the magnetic shielding elongated block 261 is made of a magnetic shielding material, specifically, aluminum alloy, alumina, or zirconium oxide.

[0092] Reference Figure 11 The magnetic shielding block 261 has a plurality of first plates 2611 on the side facing the connecting wing 224. The plurality of first plates 2611 are arranged sequentially at intervals along the length direction of the magnetic shielding block 261. Two adjacent first plates 2611 are arranged in parallel at intervals, and two adjacent first plates 2611 form a first groove 2612 at intervals.

[0093] Reference Figure 11A plurality of second plates 2241 are provided on the side of the connecting wing 224 facing the magnetic shielding plate. The plurality of second plates 2241 are arranged sequentially at intervals along the length direction of the magnetic shielding block 261. Adjacent second plates 2241 are arranged in parallel at intervals, and adjacent second plates 2241 form a second groove 2242 at intervals.

[0094] Reference Figure 11 The first slot 2612 is set in a one-to-one correspondence with the second plate 2241, the second slot 2242 is set in a one-to-one correspondence with the first plate 2611, and the first plate 2611 is plugged into the corresponding second slot 2242, the second plate 2241 is plugged into the corresponding first slot 2612, and the first plate 2611 is movably connected to the two adjacent second plates 2241.

[0095] The staggered interlocking of the first plate 2611, the second plate 2241, the first groove 2612, and the second groove 2242 achieves a detachable connection between the connecting wing 224 and the magnetic shielding component 26. This structural design increases the base area and engagement depth between the connecting wing 224 and the magnetic shielding component 26, thereby effectively transmitting force between them and ensuring the stability of the connection. This, in turn, ensures the stability of the series-connected winding teeth 22.

[0096] Meanwhile, after the first plate 2611 is inserted into the corresponding second slot 2242, the first plate 2611 is movably connected with the two adjacent second plates 2241, which allows the first plate 2611 to rotate within the corresponding second slot 2242. Similarly, the second plate 2241 can also rotate within the corresponding first slot 2612. This results in a relative degree of rotational freedom between the connecting wing 224 and the magnetic shielding member 26, thus enabling a rotational connection between the connecting wing 224 and the magnetic shielding member 26.

[0097] Reference Figure 11 and Figure 12 A first hole 2613 is formed through the first plate 2611, and a second hole 2243 is formed through the second plate 2241. Several first holes 2613 and several second holes 2243 are coaxially connected in sequence. A rotating column 262 is also provided between the magnetic shielding block 261 and the connecting wing 224. The rotating column 262 is coaxially inserted and engaged with several first holes 2613 and several second holes 2243 in sequence, and both the first plate 2611 and the second plate 2241 are rotatably connected to the rotating column 262.

[0098] With the cooperation of the rotating column 262, the first hole 2613 and the second hole 2243, after the magnetic shielding component 26 is connected to one end of the connecting wing 224, several first holes 2613 and several second holes 2243 are connected in sequence. At this time, the rotating column 262 is inserted into several first holes 2613 and several second holes 2243 in sequence. This allows the rotating column 262 to pass through the interlaced first plate 2611 and second plate 2241. This ensures that the magnetic shielding component 26 and the connecting wing 224 are rotatably connected, while preventing the magnetic shielding component 26 and the connecting wing 224 from separating, thereby ensuring the stability of several winding teeth 22 connected in series.

[0099] In this embodiment, refer to Figure 4 and Figure 11 The rotating column 262 is located between the two end sealing rings 251 along its own axial direction, and the two ends of the rotating column 262 abut against the corresponding end sealing rings 251 respectively.

[0100] By bringing the two ends of the rotating column 262 into contact with the end sealing ring 251, the end sealing ring 251 can axially position and limit the rotating column 262. After the end sealing ring 251 is installed and tightened, it can effectively prevent the rotating column 262 from sliding axially or moving out during motor operation, thereby ensuring the stability and reliability of the connection between the magnetic shielding component 26 and the connecting wing 224.

[0101] Reference Figure 11 The magnetic shielding block 261 has several ejection slots 2614 on the side facing the connecting wing 224. The ejection slots 2614 are arranged in a one-to-one correspondence with the first plate 2611, and the first plate 2611 is inserted into the corresponding ejection slot 2614. The first plate 2611 is slidably connected to the inner wall of the ejection slot 2614.

[0102] Based on the opening of the ejection slot 2614, each first plate 2611 can slide into or out of the corresponding ejection slot 2614. When the first plate 2611 extends out of the ejection slot 2614, the first plate 2611 can be inserted into the corresponding second slot 2242. Therefore, when the first plate 2611 is retracted into the corresponding ejection slot 2614, the magnetic shielding member 26 and the connecting wing 224 cannot be connected.

[0103] Reference Figure 11 and Figure 12A through-hole 2615 is provided on the magnetic shielding block 261, extending through the block along its length. Several ejection slots 2614 communicate with the through-hole 2615, which extends along the width of the block. An anti-rotation square hole 2616 is provided on the first plate 2611, communicating with the through-hole 2615. An anti-rotation square rod 263 is provided on the magnetic shielding block 261, engaging with the through-hole 2615 and slidingly connected to the inner wall of the through-hole along its length. The anti-rotation square rod 263 is sequentially engaged with several anti-rotation square holes 2616.

[0104] Based on the anti-rotation square rod 263 and the anti-rotation square hole 2616, the anti-rotation square rod 263 is connected to several first plates 2611, so that pushing the anti-rotation square rod 263 can push the several first plates 2611 to move synchronously. On this basis, due to the opening of the elongated ejection hole 2615, and the insertion and cooperation between the anti-rotation square rod 263 and the elongated ejection hole 2615, the anti-rotation square rod 263 can slide within the elongated ejection hole 2615, thereby realizing the pushing of the several first plates 2611.

[0105] Therefore, refer to Figure 11 When it is necessary to disassemble the magnetic shielding component 26 and the connecting wing 224, remove the rotating column 262 between the magnetic shielding component 26 and the connecting wing 224. At this time, push the anti-rotation square rod 263, and several first plates 2611 can be pulled out from the corresponding second groove 2242 and retracted into the corresponding push-out groove 2614. This can disconnect the connection between the magnetic shielding component 26 and the connecting wing 224, thereby realizing the detachable connection between the magnetic shielding component 26 and the connecting wing 224.

[0106] The implementation principle of this application embodiment is as follows: a coil 23 is pre-wound on a number of winding teeth 22, then the number of winding teeth 22 are connected in series to form a ring, and finally the number of winding teeth 22 connected in series are simultaneously inserted between the iron core ring 21 and the sealing groove ring 24, which can improve the assembly efficiency of the stator 2.

[0107] When a single coil 23 is damaged, the two rotating posts 262 on both ends of the corresponding connecting wing 224 are pulled out, and then the anti-rotation square rods 263 on the magnetic shielding parts 26 connected to both ends of the connecting wing 224 are pushed, so that several first plates 2611 are retracted into the corresponding push-out slots 2614. At this time, the connection between the two ends of the connecting wing 224 and the corresponding magnetic shielding parts 26 is released, and the corresponding winding teeth 22 can be taken out, which facilitates the replacement of a single winding tooth 22.

[0108] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A closed-slot energy-saving permanent magnet synchronous motor, characterized in that, include: The enclosure (1), stator (2), rotor (3) and shaft (4) are provided. The stator (2) is coaxially inserted with the enclosure (1). The stator (2) is coaxially sleeved on the outside of the rotor (3) and the stator (2) and the rotor (3) are spaced apart. The shaft (4) is coaxially inserted with the rotor (3) and the rotor (3) is fixedly connected to the shaft (4). Both ends of the shaft (4) are rotatably connected to the enclosure (1). The stator (2) includes an iron core ring (21), and a plurality of winding teeth (22) are provided on the outer side of the iron core ring (21). One end of the winding teeth (22) is connected to the iron core ring (21), and the other end extends radially away from the iron core ring (21) along the corresponding direction. A coil (23) is sleeved on the winding teeth (22). The stator (2) also includes a sealing ring (24), which is coaxially sleeved on the outside of the core ring (21). The winding tooth (22) is located between the sealing ring (24) and the core ring (21), and the end of the winding tooth (22) away from the core ring (21) is detachably connected to the sealing ring (24). The winding teeth (22) are detachably connected to the iron core ring (21); The winding tooth (22) is provided with a connecting wing (224), and a plurality of the connecting wings (224) are arranged sequentially at intervals along the circumference of the iron core ring (21), and two adjacent connecting wings (224) are rotatably connected and detachably connected. A magnetic shielding element (26) is provided between two adjacent connecting wings (224). The magnetic shielding element (26) is rotatably connected to the corresponding connecting wing (224) on its opposite sides and is detachably connected.

2. The enclosed slot energy-saving permanent magnet synchronous motor according to claim 1, characterized in that, The winding tooth (22) is provided with a first insertion wing (222) on the side facing the iron core ring (21). The outer wall of the iron core ring (21) is provided with a plurality of first insertion slots (211). The first insertion slots (211) penetrate the iron core ring (21) along the axial direction of the iron core ring (21). The first insertion wing (222) is provided in a one-to-one correspondence with the first insertion slot (211). The first insertion wing (222) is inserted into the corresponding first insertion slot (211). The winding tooth (22) is provided with a second insertion wing (223) on the side facing the sealing ring (24). The inner sidewall of the sealing ring (24) is provided with a plurality of second insertion slots (241). The second insertion slots (241) penetrate the sealing ring (24) along the axial direction of the sealing ring (24). The second insertion wing (223) is provided in a one-to-one correspondence with the second insertion slot (241). The second insertion wing (223) is inserted into the corresponding second insertion slot (241).

3. The enclosed-slot energy-saving permanent magnet synchronous motor according to claim 1, characterized in that, Two limiting wings (221) are provided on the winding tooth (22). The limiting wings (221) are spaced apart along the axial direction of the coil (23). The coil (23) is located between the two limiting wings (221) along its own axial direction, and the two ends of the coil (23) respectively abut against the corresponding limiting wings (221).

4. The enclosed-slot energy-saving permanent magnet synchronous motor according to claim 1, characterized in that, The stator (2) also includes a reinforcement component (25), which includes two end sealing rings (251) that are coaxially spaced apart. The end sealing ring (251) is coaxially arranged with the core ring (21). The core ring (21) and the sealing groove ring (24) are both located between the two end sealing rings (251). The two ends of the core ring (21) are respectively connected to the corresponding end sealing ring (251), and the two ends of the sealing groove ring (24) are respectively connected to the corresponding end sealing ring (251).

5. The enclosed-slot energy-saving permanent magnet synchronous motor according to claim 4, characterized in that, The reinforcement component (25) further includes a plurality of reinforcing posts (252), which are located between the two end sealing rings (251), and the two ends of the reinforcing posts (252) are respectively connected to the corresponding end sealing rings (251); The core ring (21), the sealing ring (24), and the winding teeth (22) are all provided with a number of reinforcing holes (253). The reinforcing holes (253) are provided in a one-to-one correspondence with the reinforcing posts (252), and the reinforcing posts (252) are coaxially inserted into the corresponding reinforcing holes (253).

6. The enclosed-slot energy-saving permanent magnet synchronous motor according to claim 5, characterized in that, Both ends of the reinforcing column (252) pass through the corresponding end sealing ring (251), and the end sealing ring (251) is slidably connected to the reinforcing column (252) along its own axial direction; The reinforcing column (252) is screwed with reinforcing nuts (254) at both ends, and two end sealing rings (251) are located between the two reinforcing nuts (254), and the reinforcing nuts (254) abut against the corresponding end sealing rings (251).

7. The enclosed-slot energy-saving permanent magnet synchronous motor according to claim 1, characterized in that, The magnetic shielding component (26) has a first plate (2611) on the side facing the connecting wing (224), and the connecting wing (224) has a second plate (2241) on the side facing the magnetic shielding component (26). The first plate (2611) and the second plate (2241) are arranged opposite each other along the axial direction of the iron core ring (21). A first hole (2613) is opened through the first plate (2611), and a second hole (2243) is opened on the second plate (2241). The first hole (2613) and the second hole (2243) are coaxially arranged. A rotating column (262) is provided between the magnetic shielding component (26) and the connecting wing (224). The rotating column (262) is coaxially inserted with the first hole (2613) and the second hole (2243), and the first plate (2611) and the second plate (2241) are rotatably connected to the rotating column (262).

Images