Structure for improving heat dissipation capability of damping bar of laminated magnetic pole synchronous motor, assembly method and laminated magnetic pole synchronous motor

Abstract

The invention provides a structure for improving the heat dissipation capability of a damping bar of a laminated magnetic pole synchronous motor, an assembly method and the laminated magnetic pole synchronous motor, and belongs to the field of laminated magnetic pole synchronous motors. The problem of how to effectively improve the heat dissipation capability of the damping bar of the laminated magnetic pole synchronous motor is solved. Multi-layer fins of the heat dissipation structure are welded to damping bars of the laminated magnetic pole synchronous motor, graphene coatings are sprayed to the fins and the damping bars, the damping bars are of hollow structures and filled with phase change materials, one ends of the damping bars are fixed to damping rings, the other ends of the damping bars are connected with magnetic pole iron cores, and damping ring upper heat dissipation ribs are arranged at the bottoms of the damping rings. A composite heat dissipation system of internal phase change flow heat exchange, fins and damping ring heat dissipation ribs is adopted, heat is promoted to be evenly distributed inside through phase change circulation of a phase change material, a three-dimensional heat dissipation network is formed outside through damping strip surface heat dissipation fins and damping ring integrated heat dissipation ribs, and heat transfer from a damping winding to the external environment is remarkably accelerated.

Description

Technical Field

[0001] This invention belongs to the field of laminated magnetic pole synchronous motors, and in particular relates to a structure, assembly method and laminated magnetic pole synchronous motor for improving the heat dissipation capacity of damping strips in laminated magnetic pole synchronous motors. Background Technology

[0002] During startup and operation, the damping bars of a laminated pole synchronous motor generate heat due to the current flowing through them. Traditional laminated pole synchronous motors face a severe heat generation bottleneck during startup, primarily due to insufficient heat capacity and a single heat dissipation path. The key issues are as follows: 1) Insufficient heat capacity: Traditional damping bars use a solid round copper rod structure, which has limited heat capacity. During startup, the Joule heat generated by the induced current cannot be absorbed quickly, causing the temperature to rise sharply to the critical point, resulting in material softening or permanent deformation and reducing motor life.

[0003] 2) Low heat dissipation efficiency: The heat dissipation path is singular, mainly relying on natural convection between the damping strip surface and the airflow inside the motor. Due to the small surface area of ​​the damping strip and insufficient airflow contact, the heat dissipation rate is slow, and heat easily accumulates in local areas, forming hot spots and exacerbating thermal fatigue.

[0004] 3) Structural design limitations: The interface between the damping strip and the damping ring is often connected by bolts or ordinary welding, which introduces contact resistance and generates additional heat. At the same time, the damping ring lacks effective heat dissipation enhancement and cannot quickly dissipate heat.

[0005] 4) Poor cycle reliability: Residual heat after startup leads to material performance degradation, making it difficult to cope with frequent start-stop cycles. Existing technologies attempt to add heat sinks or improve materials, but do not solve the fundamental problem of heat capacity, resulting in limited effectiveness and high costs.

[0006] These interconnected technical problems not only reduce the stability of the motor starting process, but also cause winding structure fatigue through the accumulation of cyclic thermal stress, ultimately shortening the overall service life of the motor. Summary of the Invention

[0007] In view of this, to address the problem of effectively improving the heat dissipation capacity of the damping strip in a laminated pole synchronous motor, this invention proposes a structure, assembly method, and a laminated pole synchronous motor for improving the heat dissipation capacity of the damping strip. Specifically, it is an improved thermal management structure for the damping winding (including the damping strip and damping ring) to enhance the heat dissipation efficiency of the damping strip in the laminated pole synchronous motor, enabling the motor to operate stably under higher heat conditions, extending the service life of the damping strip and the motor as a whole, and improving the reliability and performance of the motor. This structure is suitable for the damping system of high-power synchronous motors during the starting phase. It aims to significantly improve the heat capacity and heat dissipation efficiency by optimizing the geometric design, material filling, and heat dissipation path of the damping strip and damping ring, thereby solving the overheating problem during the starting process. This technology is particularly suitable for frequent start-stop or high-torque applications.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a structure for improving the heat dissipation capacity of a damping strip in a laminated magnetic pole synchronous motor, comprising multiple layers of fins, wherein the multiple layers of fins are welded onto the damping strip of the laminated magnetic pole synchronous motor, and a graphene coating is sprayed onto the fins and the damping strip. The damping strip is a hollow structure, and the hollow structure is filled with a phase change material. One end of the damping strip is fixed to a damping ring, and the other end is connected to the magnetic pole core. Several heat dissipation ribs are provided at the bottom of the damping ring.

[0009] Furthermore, the fins are made of aluminum alloy or copper alloy.

[0010] Furthermore, the thickness of the graphene coating is from 1 micrometer to 100 micrometers.

[0011] Furthermore, the multi-layered fins are welded onto the damping strip using laser welding, argon arc welding, or brazing processes.

[0012] Furthermore, the phase change material is a paraffin-based composite material.

[0013] Furthermore, the damping strip includes a hollow polygonal structure inside the damping strip and a damping strip body. The damping strip body contains the hollow polygonal structure inside the damping strip, and the hollow polygonal structure inside the damping strip is filled with a phase change material.

[0014] Furthermore, the damping strip body is a copper alloy damping strip.

[0015] Furthermore, the damping ring includes a damping ring through cavity, a damping ring body, multiple damping ring and damping strip connection holes, and a damping ring heat dissipation rib. The damping ring through cavity is provided inside the damping ring body, multiple damping ring and damping strip connection holes are provided on the inner side of the damping ring body, and a damping ring heat dissipation rib is provided at the bottom of the damping ring body.

[0016] An assembly method for a structure that improves the heat dissipation capacity of damping bars in a laminated magnetic pole synchronous motor specifically includes the following steps: Step 1: Place the magnetic pole core on a horizontal base plane, ensuring that its mounting surface is flat and free of impurities. Select hollow polygonal damping strips, with the size of the hollow polygonal structure inside the damping strip matching the amount of phase change material filling. Insert the corresponding number of damping strips one by one into the preset mounting holes of the magnetic pole core, ensuring that the damping strips are tightly fitted to the hole walls of the magnetic pole core, forming an effective path for heat conduction to the core. Step 2: Along the length of the damping strip between the magnetic pole core and the damping ring, attach the fins to the outer surface of the damping strip at 5mm intervals and fix them in place. The weld should be continuous and without any gaps to ensure full contact between the fins and the damping strip to improve heat conduction efficiency. Then, insert the end of the damping strip into the damping ring and damping strip connection hole of the damping ring. The insertion depth should be consistent with the wall thickness of the damping ring. Use silver-copper solder to perform circumferential welding at the connection between the damping strip and the damping ring to ensure that the connection is sealed without gaps and to eliminate contact resistance. Step 3: Inject the phase change material into the integrated sealed cavity through the injection port of the damping ring using an injection device. The filling amount is controlled to be 80%-90% of the total volume of the cavity, leaving 10%-20% space for the expansion of the phase change material. After the injection is completed, immediately seal the injection port and then put it into a vacuum device for vacuuming to completely remove the air in the cavity and improve the fluidity and heat transfer uniformity of the phase change material. Step 4: After vacuum treatment, perform an airtightness test on the overall assembly structure to prevent leakage of phase change material or entry of external impurities. At the same time, check whether the heat dissipation fins on the one-piece molded damping ring are intact to ensure that they are aligned with the airflow path of the internal cooling system of the motor to ensure the convective heat transfer effect. Finally, integrate and install the assembled damping winding assembly with other motor components.

[0017] A laminated magnetic pole synchronous motor includes the aforementioned fins, damping bars, damping rings, and magnetic pole cores. The damping bars are inserted into the damping rings and the damping bar connection holes and then welded together by brazing. The magnetic pole cores have inner holes, and the damping bars are inserted into the magnetic pole cores.

[0018] Compared with the prior art, the beneficial effects of the structure, assembly method, and laminated magnetic pole synchronous motor for improving the heat dissipation capacity of the damping strip in the present invention are as follows: 1. Enhanced Heat Capacity: Phase Change Thermal Storage Suppresses Sudden Temperature Rise. By filling the damping strip with phase change material, the large amount of latent heat released during the phase change process is utilized to achieve efficient heat storage, thus increasing the equivalent heat capacity of the damping winding compared to the traditional solid structure. This design effectively absorbs the Joule heat generated during startup, reducing the temperature peak by 30%-40%, fundamentally alleviating the problem of sudden temperature rise caused by insufficient heat capacity in traditional structures.

[0019] 2. Enhanced Heat Dissipation Efficiency: Dual-Path Synergistic Heat Transfer. The combination of multi-layered fins and graphene coating significantly improves the heat dissipation speed of the damping strip, effectively reducing its temperature during startup and operation. Simultaneously, an innovative composite heat dissipation system is adopted: "internal phase change flow heat transfer + fins + damping ring heat dissipation fins." Internally, the phase change cycle of the phase change material promotes uniform heat distribution; externally, the heat dissipation fins on the damping strip surface and the integrated heat dissipation fins of the damping ring form a three-dimensional heat dissipation network. This dual-path design improves overall heat dissipation capacity by more than 40%, shortens the thermal response time to one-third of the traditional structure, and significantly accelerates the transfer of heat from the damping winding to the external environment.

[0020] 3. Cyclic Reliability: Self-Recovering Long-Term Heat Storage Mechanism. After the motor starts, the phase change material naturally recrystallizes as the motor operating temperature drops, returning to its initial heat storage state, achieving cyclic reuse without external intervention. Experimental verification shows that the treated phase change material can withstand ≥10,000 phase change cycles. Based on two starts per day, this ensures the damping winding provides stable heat storage buffering capacity for nearly 14 years, meeting the maintenance-free requirements throughout the motor's entire lifecycle.

[0021] 4. Enhanced motor reliability: By better controlling the temperature of the damping strip, the performance degradation and failure risk of the damping strip due to overheating are reduced, thereby improving the overall reliability and stability of the motor.

[0022] 5. Extended service life: Lower operating temperature is beneficial to the long-term use of damping strips and other motor components, reducing damage caused by thermal stress and thermal aging, thereby extending the service life of the motor.

[0023] 6. This invention is adapted to more demanding startup environments and can operate under conditions of longer startup times and greater startup loads. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of the laminated magnetic pole synchronous motor described in this invention; Figure 2 This is a cross-sectional view of the damping bar and fins; Figure 3 This is a cross-sectional view of the laminated magnetic pole synchronous motor described in this invention; Figure 4 This is the front view of the damping ring; Figure 5 for Figure 4 AA section diagram; Figure 6 This is the front view of the damping strip; Figure 7 This is the right view of the damping bar; Figure 8 This is a schematic diagram showing the welding positions of the damping strip and damping ring, and the damping strip and heat sink. In the figure: 1-damping ring; 2-fin; 3-damping bar; 4-magnetic pole core; 31-hollow polygonal structure inside the damping bar; 32-damping bar body; 41-dampening ring through cavity; 42-damping ring body; 43-connection hole between damping ring and damping bar; 44-heat dissipation fins on the damping ring. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the drawings, and not all of them. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the invention.

[0026] Example 1: See Figure 1-8 This embodiment describes a structure for improving the heat dissipation capacity of a damping strip in a laminated magnetic pole synchronous motor. The structure includes multiple layers of fins 2 welded to a damping strip 3 of the laminated magnetic pole synchronous motor. A graphene coating is sprayed onto the fins 2 and the damping strip 3. The damping strip 3 is a hollow structure filled with a phase change material. One end of the damping strip 3 is fixed to a damping ring 1, and the other end is connected to a magnetic pole core 4. The bottom of the damping ring 1 is provided with several heat dissipation ribs 44.

[0027] The fins 2 are made of metal materials with good thermal conductivity and certain strength, such as aluminum alloy or copper alloy.

[0028] The thickness of the graphene coating is from 1 micrometer to 100 micrometers.

[0029] The multi-layer fins 2 are welded onto the damping strip 3 by laser welding, argon arc welding, or brazing.

[0030] When the damping strip 3 heats up, the heat is conducted to the magnetic pole core 4 through heat transfer. The fins 2 are welded to the damping strip 3. A certain heat dissipation gap is reserved between multiple fins 2. The damping ring 1 and the damping strip 3 within the size L range are sprayed with a graphene coating, and the graphene coating completely covers their surface. The damping strip 3 includes a hollow polygonal structure 31 inside the damping strip and a damping strip body 32. The hollow polygonal structure 31 inside the damping strip body 32 is filled with a phase change material. The damping strip body 32 is a damping strip made of copper alloy.

[0031] 1. Fin welding First, select metal fins of suitable specifications and materials. Design the shape and size of the fins 2 according to the dimensions and shape of the damping strip 3 to ensure good welding between the fins 2 and the damping strip 3. Employ precision welding techniques, such as laser welding, argon arc welding, or brazing, to uniformly weld the multiple layers of fins 2 onto the surface of the damping strip 3. During the welding process, strictly control welding parameters, such as welding current, welding speed, and welding temperature, to ensure welding quality and guarantee good thermal conductivity and mechanical connection strength between the fins and the damping strip.

[0032] 2. Graphene spraying After the fins 2 are welded and surface treated (such as grinding and cleaning), graphene is sprayed onto them. Graphene is evenly sprayed onto the surfaces of fins 2 and damping strips 3 using a spraying device. During the spraying process, the coating thickness is controlled to ensure that the graphene coating can effectively conduct heat without being too thick and affecting other internal performance characteristics of the motor. Simultaneously, it is crucial to ensure that the graphene coating adheres tightly to the surfaces of fins 2 and damping strips 3, free from defects such as bubbles and cracks.

[0033] The assembly process of the structure for improving the heat dissipation capacity of the damping strip in a laminated magnetic pole synchronous motor as described in this invention is as follows: Step 1: Place the magnetic pole core 4 on a horizontal base plane, ensuring its mounting surface is flat and free of impurities. Select a hollow polygonal damping strip 3 with a regular hexagonal cross-section (6-8 sides, meeting the requirements for heat exchange and mechanical balance optimization). The damping strip body 32 is made of copper alloy, with a thickness of not less than 3-4mm (to meet the conductivity requirements under the skin effect). The size of the hollow polygonal structure 31 inside the damping strip matches the amount of phase change material filling. Insert the corresponding number of damping strips 3 one by one into the preset mounting holes of the magnetic pole core 4, ensuring that the damping strip 3 fits tightly against the hole wall of the magnetic pole core 4, forming an effective path for heat conduction to the core.

[0034] Step 2: Along the length of the damping strip 3 between the magnetic pole core 4 and the damping ring 1, at 5mm intervals, attach the fins 2 to the outer surface of the damping strip 3 and fix them in place. The welds must be continuous and without any gaps to ensure full contact between the fins 2 and the damping strip 3, thereby improving heat transfer efficiency (refer to welding position). Figure 8 (As shown). Then, insert the end of the damping strip 3 into the damping ring 1's damping ring and damping strip connection hole 43 (see reference). Figure 5The insertion depth is consistent with the wall thickness of the damping ring 1. The connection between the damping strip 3 and the damping ring 1 is circumferentially welded (fitted) using silver-copper solder. Figure 8 (Welding diagram) Ensure the connection is sealed without gaps to eliminate contact resistance.

[0035] Step 3: Select a paraffin-based composite material with a suitable phase change temperature as the heat storage medium. Inject the material into the integrated sealed cavity (formed by the hollow structure of the damping strip and the through cavity 41 of the damping ring) through the pre-set injection port of the damping ring 1 using an injection device. The filling amount is controlled to be 80%-90% of the total cavity volume, leaving 10%-20% space for the expansion of the phase change material. After the injection is completed, immediately seal the injection port and then place it in a vacuum device for vacuum treatment to completely remove the air in the cavity and improve the fluidity and heat transfer uniformity of the phase change material.

[0036] Step 4: After vacuum treatment, perform an airtightness test on the overall assembly structure to prevent leakage of phase change material or entry of external impurities. Simultaneously, check the integrity of the heat dissipation fins 44 on the integrally formed outer surface of the damping ring 1, ensuring they are aligned with the airflow path of the motor's internal cooling system to guarantee effective convective heat transfer. Finally, integrate the assembled damping winding assembly with other motor components, initiate a trial run, and use a temperature sensor to detect the peak temperature on the damping strip surface. Verify that the temperature is 30%-40% lower than traditional structures, confirming that the heat capacity and heat dissipation efficiency meet design requirements. The overall assembly is then complete.

[0037] The core inventive point of this invention is: 1. Damping bar structure optimization design To improve the heat capacity and overall performance of the damping winding, the traditional solid round copper rod damping bar is optimized into a hollow polygonal cross-section structure. This geometric innovation achieves a dual breakthrough in enhancing heat exchange and balancing structural mechanics. The design retains the outer contour of the round copper rod to maintain electromagnetic compatibility, while the interior uses a polygonal hollow structure filled with phase change material to form a composite functional system of "outer conductive layer - inner heat storage layer".

[0038] (1) Heat exchange enhancement mechanism The polygonal structure of the inner wall improves heat transfer efficiency by increasing the contact area between the phase change material and the inner wall of the damping strip. Geometric calculations show that when the number of sides of the polygon is 6-8 (regular hexagon or regular octagon), the contact area can be increased by more than 30% compared to a smooth inner wall. This structure allows the phase change material to cover the inner wall surface more uniformly, and strengthens the heat conduction path through multi-point contact and corner effects, significantly improving the heat transfer efficiency from the copper rod to the phase change material and slowing down the temperature rise rate of the damping strip during transient processes.

[0039] (2) Balance between structural mechanics and electromagnetic properties The hollow design reduces copper usage by 30% while ensuring mechanical strength through the stress dispersion effect of the polygonal cross-section. Finite element analysis shows that the maximum stress value of the hexagonal cross-section is 15% lower than that of a solid structure of the same weight, and its equal strength characteristics effectively avoid material redundancy in the solid structure. Electromagnetic simulation results show that the hollow structure has a negligible impact on the current distribution of the damping bar—due to the skin effect, high-frequency transient currents are mainly concentrated in the outer 1-2 mm region of the copper rod. The polygonal inner wall design does not change the effective area and magnetic field distribution characteristics of the outer conductive cross-section, ensuring that the dynamic suppression performance of the damping winding is on par with the traditional structure. This optimized structure achieves synergistic optimization of heat capacity improvement and material saving through morphological innovation, providing a new technical path for the thermal management of damping windings of large synchronous motors.

[0040] 2. Improved Damping Ring Structure Improving the damping ring structure is a key step in enhancing the heat capacity of the damping winding, which is mainly achieved through the synergistic effect of the through-cavity design and the heat dissipation fin efficiency enhancement mechanism.

[0041] (1) Function of the through cavity The damping ring 1 adopts a design with a through cavity in the middle. As an extension structure of the hollow cavity of the damping strip, its core functions are reflected in two aspects: first, to build a circulation channel for the heat storage medium and ensure the circulation of the phase change material in the damping winding system; second, to provide phase change expansion space for the phase change material, effectively alleviate the volume change stress generated during the phase change of the material, and avoid structural damage.

[0042] (2) Mechanism of heat dissipation fins A heat dissipation fin is integrally formed on the outer surface of the damping ring 1, creating a secondary heat dissipation station to enhance the heat dissipation path. This design increases the heat dissipation area of ​​the outer surface of the damping ring by 40%-60% compared to traditional structures, significantly enhancing the convective heat transfer efficiency with the cooling airflow inside the motor. From a fluid dynamics perspective, the heat dissipation fin can disturb the cooling airflow flowing across the surface of the damping ring, disrupting boundary layer development and promoting turbulence formation, thereby increasing the local convective heat transfer coefficient and accelerating the transfer of heat from the damping ring to the cooling system.

[0043] 3. Integrated sealed cavity structure The integrated sealed cavity structure is a core design innovation for improving the heat capacity of the damping winding, achieving a systematic improvement in structural performance through multi-dimensional technical optimization. In terms of structural design, each magnetic pole is equipped with multiple hollow polygonal damping strips, with the hollow ends of each strip inserted into the damping ring cavity, ensuring complete communication between all damping strips and the damping ring cavity, forming a fully connected integrated fluid channel. This design not only achieves the integrity of the mechanical structure but also provides a physical basis for the flow and heat transfer of the phase change material.

[0044] In terms of medium flowability, the fully connected cavity structure establishes a synergistic mechanism of "distributed heat storage - centralized heat dissipation." The phase change material (PCM) can flow freely between the damping strips and damping rings. When heat is generated in a localized area due to eddy currents, the PCM absorbs and transfers heat through its latent heat of phase change, achieving dynamic thermal balance in the winding system. Welded sealing combined with subsequent vacuum treatment further ensures the structural sealing reliability, effectively preventing PCM leakage and the ingress of external impurities, providing crucial assurance for long-term operational stability. This design, integrating structural strength, thermal management efficiency, and operational reliability, significantly overcomes the thermal capacity bottleneck of traditional damping windings.

[0045] 4. Phase change material filling and circulation mechanism The phase change material filling and circulation mechanism enhances the heat capacity of the damping winding through a dynamic thermal management process. Its core lies in utilizing the latent heat and spatial flow characteristics of the phase change material to construct an efficient heat dissipation cycle. In terms of structural design, the integrated sealed cavity needs to be evacuated, and the filling amount is controlled to be partially full to reserve space for phase change expansion and flow, laying the physical foundation for subsequent circulation.

[0046] Material selection must ensure the phase change temperature matches the motor's starting temperature rise curve. Organic phase change materials (such as paraffin-based composites) with a phase change point of 120-150℃ are typically chosen to ensure phase change occurs within the peak temperature range of the damping strip. After startup, as the motor's operating temperature drops, the phase change material naturally cools and returns to its initial state in a low-temperature environment, achieving cyclic reuse and forming a closed-loop thermal management system throughout its entire lifecycle. This design reduces the peak temperature of the damping winding during startup by more than 40%, significantly improving the motor's transient overload capacity.

[0047] 5. Fin configuration The fins 2 are a key external reinforcement method to improve the heat dissipation performance of the damping winding. Specifically, fins 2 are welded evenly at intervals along the length of the exposed damping strip 3 between the magnetic pole core 4 and the damping ring 1. This structural design significantly increases the surface heat dissipation area of ​​the damping strip 3, accelerating the heat exchange efficiency between the damping strip 3 and the internal cooling airflow of the motor, thereby effectively improving the surface heat dissipation speed. This increase in surface area directly improves the convective heat transfer coefficient, enabling the heat generated by the damping winding during motor startup and operation to be quickly transferred to the motor cooling system through the heat sinks, further ensuring the thermal stability and service life of the damping winding.

[0048] 6. Graphene Coating Design A graphene coating is sprayed onto fin 2 and damping strip 3. Graphene has an extremely high thermal conductivity, which is superior to that of the copper damping strip 3. During motor startup, the high temperature generated by damping strip 3 can be quickly conducted to the surrounding environment through the graphene coating on the surface of damping strip 3 and fin 2, making it easier for heat to dissipate and enabling the motor to withstand higher heat generation in a short period of time.

[0049] Example 2: See Figure 1-8 This embodiment describes a laminated magnetic pole synchronous motor, which includes the structure described above for improving the heat dissipation capacity of the damping strip, a damping strip 3, a damping ring 1, and a magnetic pole core 4. The magnetic pole core 4 has damping strips 3 on both sides, and the other end of the damping strip 3 is fixed by the damping ring 1.

[0050] The damping ring 1 and the magnetic pole core 4 have inner holes. The damping strip 3 is inserted into the damping ring 1 and then welded together by brazing. The damping strip 3 is inserted into the magnetic pole core 4, and the two are tightly fitted together.

[0051] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating orientation and positional relationships are based on the orientation and positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0052] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A structure for improving the heat dissipation capacity of damping bars in a laminated magnetic pole synchronous motor, characterized in that: It includes multi-layer fins (2), which are welded to the damping strip (3) of the laminated magnetic pole synchronous motor. Graphene coating is sprayed onto the fins (2) and the damping strip (3). The damping strip (3) is a hollow structure, and a phase change material is disposed inside the hollow structure. One end of the damping strip (3) is fixed to the damping ring (1), and the other end is connected to the magnetic pole core (4). Several heat dissipation fins (44) are disposed at the bottom of the damping ring (1).

2. The structure for improving the heat dissipation capacity of the damping strip in a laminated magnetic pole synchronous motor according to claim 1, characterized in that: The fins (2) are made of aluminum alloy or copper alloy.

3. The structure for improving the heat dissipation capacity of the damping strip in a laminated magnetic pole synchronous motor according to claim 1, characterized in that: The thickness of the graphene coating is from 1 micrometer to 100 micrometers.

4. The structure for improving the heat dissipation capacity of the damping strip in a laminated magnetic pole synchronous motor according to claim 1, characterized in that: The multi-layer fins (2) are welded onto the damping strip (3) by laser welding, argon arc welding or brazing.

5. The structure for improving the heat dissipation capacity of the damping strip in a laminated magnetic pole synchronous motor according to claim 1, characterized in that: The phase change material is a paraffin-based composite material.

6. The structure for improving the heat dissipation capacity of the damping strip in a laminated magnetic pole synchronous motor according to claim 1, characterized in that: The damping strip (3) includes a hollow polygonal structure (31) inside the damping strip and a damping strip body (32). The damping strip body (32) contains the hollow polygonal structure (31) inside the damping strip, and the hollow polygonal structure (31) inside the damping strip is filled with phase change material.

7. The structure for improving the heat dissipation capacity of the damping strip in a laminated magnetic pole synchronous motor according to claim 6, characterized in that: The damping strip body (32) is a copper alloy damping strip.

8. The structure for improving the heat dissipation capacity of the damping strip in a laminated magnetic pole synchronous motor according to claim 7, characterized in that: The damping ring (1) includes a damping ring through cavity (41), a damping ring body (42), multiple damping ring and damping strip connection holes (43), and damping ring heat dissipation ribs (44). The damping ring through cavity (41) is provided inside the damping ring body (42). Multiple damping ring and damping strip connection holes (43) are provided on the inner side of the damping ring body (42). The damping ring body (42) has damping ring heat dissipation ribs (44) at the bottom.

9. An assembly method for a structure as described in claim 8 for improving the heat dissipation capacity of damping bars in a laminated magnetic pole synchronous motor, characterized in that, Specifically, the following steps are included: Step 1: Place the magnetic pole core (4) on a horizontal base plane, ensuring that its mounting surface is flat and free of impurities. Select a damping strip (3) with a hollow polygonal interior. The size of the hollow polygonal structure (31) inside the damping strip matches the amount of phase change material filling. Insert the corresponding number of damping strips (3) one by one into the preset mounting holes of the magnetic pole core (4), ensuring that the damping strip (3) is tightly attached to the hole wall of the magnetic pole core (4) to form an effective path for heat conduction to the core. Step 2: Along the length of the damping strip (3) between the magnetic pole core (4) and the damping ring (1), the fins (2) are attached to the outer surface of the damping strip (3) at 5mm intervals and fixed by welding. The weld is continuous and without any false welds. Then, the end of the damping strip (3) is inserted into the damping ring and damping strip connection hole (43) of the damping ring (1). The insertion depth is consistent with the wall thickness of the damping ring (1). The connection between the damping strip (3) and the damping ring (1) is circumferentially welded with silver-copper solder to ensure that the connection is sealed without gaps and to eliminate contact resistance. Step 3: Inject the phase change material into the integrated sealed cavity through the injection device from the preset injection port of the damping ring (1). The filling amount is controlled to be 80%-90% of the total volume of the cavity, and 10%-20% space is reserved for the expansion of the phase change material. After the injection is completed, immediately seal the injection port and then put it into a vacuum device for vacuuming to completely remove the air in the cavity. Step 4: After vacuum treatment, the airtightness of the overall assembly structure is tested to prevent leakage of phase change material or entry of external impurities. At the same time, check whether the heat dissipation fins (44) on the damping ring (1) are intact and ensure that they are aligned with the airflow path of the internal cooling system of the motor. Finally, the assembled damping winding assembly is integrated and installed with other parts of the motor.

10. A laminated magnetic pole synchronous motor, characterized in that, The structure includes the structure for improving the heat dissipation capacity of the damping strip of the laminated magnetic pole synchronous motor as described in any one of claims 1-8. The damping strip (3) is inserted into the damping ring and the damping strip connection hole (43) and then welded by hard brazing. The magnetic pole core (4) is provided with an inner hole and the damping strip (3) is inserted into the magnetic pole core (4).

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