A heat dissipation structure for a segmented stator

Abstract

This utility model belongs to the field of motor technology, specifically relating to a heat dissipation structure for a segmented stator. By specifically designing heat dissipation pipes, which can be directly installed within the slots of the U-shaped iron cores of the segmented stator and in the core heat-generating areas of the gaps between adjacent U-shaped iron cores, this effectively solves the problems of efficiency reduction and insulation aging caused by heat accumulation in the stator, ensuring long-term stable operation of the motor. Through the design of various connection methods for the heat dissipation pipes, the heat dissipation path and intensity can be flexibly adjusted according to the structural characteristics of the segmented stator, local heat generation differences, and actual operating power requirements, further optimizing heat dissipation uniformity. The heat dissipation structure and the segmented stator structure work synergistically, retaining the low iron loss performance advantage of oriented silicon steel in the easily magnetized direction, while rapidly dissipating residual heat through the heat dissipation pipes, contributing to a further increase in motor power density and meeting the industry's development needs for high-efficiency and high-power motors.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a heat dissipation structure for a segmented stator. Background Technology

[0002] The current focus of the motor industry is on increasing power density to meet the high-performance requirements of servo actuators. However, during stator operation, iron losses (especially silicon steel hysteresis losses) and copper losses (heat generated by winding current) continuously generate heat. If this heat cannot be dissipated in time, it will not only cause a sharp drop in motor efficiency but also accelerate the aging of the stator insulation layer. In severe cases, it can lead to winding burnout, magnetic performance degradation, and other faults. Heat dissipation has become a core factor restricting the improvement of motor power density and long-term reliable operation. Against this backdrop, the use of grain-oriented silicon steel to manufacture stators has become a new choice for the industry: its iron loss in the easy-to-magnetize direction (which matches the radial magnetic lines of force of the stator teeth) is only 1 / 3 of that of traditional non-grain-oriented silicon steel, which can significantly reduce the heat generation of the teeth, and the magnetic field strength can reach 2.0T, which is about 10% higher than that of non-grain-oriented silicon steel, further optimizing the performance of the motor; however, the performance of grain-oriented silicon steel in the difficult-to-magnetize direction is significantly insufficient, with high iron loss and low permeability. If it is applied to areas such as the stator yoke, it is easy to cause local heat accumulation and increase the heat dissipation pressure.

[0003] However, existing grain-oriented silicon steel stator structures only focus on performance improvement, completely neglecting heat dissipation requirements. For example, stator core structures with grain-oriented silicon steel stator teeth and non-gravity-oriented silicon steel yokes lack pre-reserved heat dissipation channels, causing heat to easily accumulate at the joints. U-shaped grain-oriented silicon steel bonded cores, due to complex winding processes and low slot fill factor, lead to increased copper losses and heat generation in the windings, and also lack any corresponding heat dissipation design. Therefore, this paper proposes to develop a dedicated heat dissipation system based on the grain-oriented silicon steel stator structure to specifically address the stator's heat dissipation challenges. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a heat dissipation structure for a segmented stator to solve the problem of heat dissipation difficulties in the use of motors with existing segmented stator structures.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A heat dissipation structure for a segmented stator includes multiple U-shaped iron cores evenly arranged circumferentially. Gaps are left between the teeth of adjacent U-shaped iron cores, which are fixedly connected by insulating clips. The yokes of all U-shaped iron cores abut against the stator housing. Each U-shaped iron core has an external winding coil. The gaps between adjacent U-shaped iron cores, the insulating clips, and the stator housing are filled with potting compound. Heat dissipation pipes are axially inserted into the slots of the U-shaped iron cores and in the gaps between adjacent U-shaped iron cores. Both ends of each heat dissipation pipe are indirectly connected to a coolant circulation pipeline.

[0006] Specifically, the first or last ends of adjacent heat dissipation pipes are connected by a first U-shaped pipe to form an S-shaped heat dissipation pipe system, and the first inlet and first outlet of the first heat dissipation pipe system are both connected to the coolant circulation pipe.

[0007] Specifically, the heat dissipation pipes located at the slots of the U-shaped iron core and the heat dissipation pipes located on one side of the U-shaped iron core are connected by a first U-shaped pipe to form a U-shaped heat dissipation pipeline. The U-shaped heat dissipation pipeline includes a first U-shaped heat dissipation pipeline and a second U-shaped heat dissipation pipeline, which are spaced apart. Adjacent first U-shaped heat dissipation pipelines are connected by a second U-shaped pipe, and all first U-shaped heat dissipation pipelines are connected to form a second heat dissipation pipeline system. Adjacent second U-shaped heat dissipation pipelines are connected by a second U-shaped pipe, and all second U-shaped heat dissipation pipelines are connected to form a third heat dissipation pipeline system. The second inlet and the second outlet of the second heat dissipation pipeline system are both connected to the coolant circulation pipeline, and the third inlet and the third outlet of the third heat dissipation pipeline system are both connected to the coolant circulation pipeline.

[0008] Specifically, three adjacent heat dissipation pipes are connected by two first U-shaped pipes to form an S-shaped heat dissipation pipeline. The S-shaped heat dissipation pipeline includes a first S-shaped heat dissipation pipeline and a second S-shaped heat dissipation pipeline. The first S-shaped heat dissipation pipeline and the second S-shaped heat dissipation pipeline are spaced apart. Adjacent first S-shaped heat dissipation pipelines are arranged in opposite directions and connected by a third U-shaped pipe. All first S-shaped heat dissipation pipelines are connected to form a fourth pipeline heat dissipation system. Adjacent second S-shaped heat dissipation pipelines are arranged in opposite directions and connected by a third U-shaped pipe. All second S-shaped heat dissipation pipelines are connected to form a fifth pipeline heat dissipation system. The fourth inlet and the fourth outlet of the fourth pipeline heat dissipation system are both connected to the coolant circulation pipeline. The fifth inlet and the fifth outlet of the fifth pipeline heat dissipation system are both connected to the coolant circulation pipeline.

[0009] Specifically, the coolant material in the coolant circulation pipeline is water-based coolant.

[0010] Specifically, the heat dissipation pipe is made of aluminum nitride ceramic matrix composite material.

[0011] It should also be noted that the coolant circulation pipeline mentioned in this utility model is an existing coolant circulation system. The coolant circulation system includes a coolant tank, a coolant pump, and a coolant heat dissipation device. The outlet of the heat dissipation pipeline of this utility model is connected to the coolant heat dissipation device. The coolant heat dissipation device is connected in sequence to the coolant tank and the coolant pump. The coolant pump is connected to the inlet of the heat dissipation pipeline. The coolant heat dissipation device can be any existing device that meets the requirements of this utility model.

[0012] Furthermore, a temperature sensor is installed at the outlet of the cooling pipe to monitor the coolant temperature in real time, and the flow rate at the inlet of the cooling pipe is dynamically adjusted by the coolant pump (using a proportional integral valve) to ensure that the coolant temperature at the outlet of the cooling pipe is always maintained at the same level.

[0013] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: This invention features heat dissipation pipes that can be directly installed in the slots of the U-shaped iron cores of the segmented stator and in the core heat-generating areas of the gaps between adjacent U-shaped iron cores. This efficiently dissipates the heat generated by iron and copper losses during the operation of the segmented stator, effectively solving the problems of efficiency reduction and insulation aging caused by heat accumulation in the stator, and ensuring long-term stable operation of the motor. Furthermore, by inserting the heat dissipation pipe axially into the gap adjacent to the U-shaped iron core and using thermally conductive silicone grease to fill the interface gap to fix the heat dissipation pipe, when the motor is running, the heat generated by the stator iron core is quickly conducted to the heat dissipation pipe through the thermally conductive silicone grease, reducing the overall temperature rise of the stator by 15%-25%. At the same time, a temperature sensor is installed at the outlet of the heat dissipation pipe to monitor the coolant temperature in real time, and the flow rate at the inlet of the heat dissipation pipe is dynamically adjusted through a proportional integral valve to ensure that the coolant temperature at the outlet of the heat dissipation pipe is always maintained at the same level.

[0014] Furthermore, by designing various connection methods for the heat dissipation pipes, the heat dissipation path and intensity can be flexibly adjusted according to the structural characteristics of the segmented stator, local heat generation differences, and actual operating power requirements, thereby further optimizing heat dissipation uniformity. The heat dissipation structure and the segmented stator structure work synergistically, retaining the performance advantages of low iron loss in the easily magnetized direction of oriented silicon steel, while rapidly dissipating residual heat through the heat dissipation pipes. This helps to further improve the motor's power density, meeting the industry's development needs for high-efficiency and high-power motors, while also extending the service life of the stator core and windings and reducing motor maintenance costs. Attached Figure Description

[0015] The accompanying drawings are incorporated in and form part of this specification, and together with the description, serve to explain the principles of this invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the segmented stator structure of this utility model; Figure 2This is a schematic diagram of the heat dissipation structure of the segmented stator in Example 1; Figure 3 This is a schematic diagram of the heat dissipation structure in Example 1; Figure 4 This is a schematic diagram of the heat dissipation structure of the segmented stator in Example 2; Figure 5 This is a schematic diagram of the heat dissipation structure in Example 2; Figure 6 This is a schematic diagram of the heat dissipation structure of the segmented stator in Example 3; Figure 7 This is a three-dimensional schematic diagram of the heat dissipation structure in Example 3.

[0018] Wherein: 1 is U-shaped iron core; 2 is insulating buckle; 3 is stator shell; 4 is heat dissipation tube; 5 is first U-shaped tube; 6 is first liquid inlet; 7 is first liquid outlet; 8 is first U-shaped heat dissipation pipe; 9 is second U-shaped heat dissipation pipe; 10 is second U-shaped tube; 11 is second liquid inlet; 12 is second liquid outlet; 13 is third liquid inlet; 14 is third liquid outlet; 15 is first S-shaped heat dissipation pipe; 16 is second S-shaped heat dissipation pipe; 17 is third U-shaped tube; 18 is fourth liquid inlet; 19 is fourth liquid outlet; 20 is fifth liquid inlet; 21 is fifth liquid outlet; 22 is rotor. Detailed Implementation

[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. The embodiments described below do not represent all embodiments consistent with this invention. Rather, they are merely examples consistent with some aspects of this invention as detailed in the appended claims.

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Example 1 See Figures 1-3 As shown, this embodiment provides a heat dissipation structure for a segmented stator, including multiple U-shaped iron cores 1 evenly arranged circumferentially. Gaps are left between the teeth of adjacent U-shaped iron cores 1, and they are fixedly connected by insulating clips 2. The yokes of all U-shaped iron cores 1 abut against the stator housing 3. Each U-shaped iron core 1 is provided with a winding coil. The gaps between adjacent U-shaped iron cores 1, the insulating clips 2, and the stator housing 3 are filled with potting compound. Heat dissipation pipes 4 are axially inserted into the slots of the U-shaped iron cores 1 and in the gaps between adjacent U-shaped iron cores 1. Both ends of each heat dissipation pipe are indirectly connected to a coolant circulation pipeline.

[0022] Specifically, the coolant circulation pipeline is an existing coolant circulation system, which includes a coolant storage tank, a coolant pump, and a coolant heat dissipation device, with the coolant heat dissipation device connected in sequence to the coolant storage tank and the coolant pump.

[0023] Specifically, the first or last ends of adjacent heat dissipation pipes 4 are connected by a first U-shaped pipe 5 to form an S-shaped heat dissipation pipe system. The first inlet 6 of the first heat dissipation pipe system is connected to the coolant pump, and the first outlet 7 of the first heat dissipation pipe system is connected to the coolant cooling device.

[0024] Specifically, the coolant material in the coolant circulation pipeline is water-based coolant.

[0025] Specifically, the heat dissipation pipe 4 is made of aluminum nitride ceramic matrix composite material.

[0026] Example 2 See Figure 4 and Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the heat dissipation pipe located at the slot of the U-shaped iron core 1 and the heat dissipation pipe 4 located on one side of the U-shaped iron core 1 are connected by a first U-shaped pipe 5 to form a U-shaped heat dissipation pipeline. The U-shaped heat dissipation pipeline includes a first U-shaped heat dissipation pipeline 8 and a second U-shaped heat dissipation pipeline 9, which are spaced apart. Adjacent first U-shaped heat dissipation pipelines 8 are connected by a second U-shaped pipe 10, and all first U-shaped heat dissipation pipelines 8 are connected to form a second heat dissipation pipeline system. Adjacent second U-shaped heat dissipation pipelines 9 are connected by a second U-shaped pipe 10, and all second U-shaped heat dissipation pipelines 9 are connected to form a third heat dissipation pipeline system. The second liquid inlet 11 of the second heat dissipation pipeline system and the third liquid inlet 13 of the third heat dissipation pipeline system are both connected to a coolant pump, and the second liquid outlet 12 of the second heat dissipation pipeline system and the third liquid outlet 14 of the third heat dissipation pipeline system are both connected to a coolant cooling device.

[0027] Example 3 See Figure 6 and Figure 7As shown, the difference between this embodiment and Embodiment 1 is that three adjacent heat dissipation pipes 4 are connected by two first U-shaped pipes 5 to form an S-shaped heat dissipation pipeline. The S-shaped heat dissipation pipeline includes a first S-shaped heat dissipation pipeline 15 and a second S-shaped heat dissipation pipeline 16. The first S-shaped heat dissipation pipeline 15 and the second S-shaped heat dissipation pipeline 16 are spaced apart. Adjacent first S-shaped heat dissipation pipelines 15 are arranged in opposite directions and connected by a third U-shaped pipe 17. All first S-shaped heat dissipation pipelines 15 are connected to form a fourth pipeline heat dissipation system. Adjacent second S-shaped heat dissipation pipelines 16 are arranged in opposite directions and connected by a third U-shaped pipe 17. All second S-shaped heat dissipation pipelines 16 are connected to form a fifth pipeline heat dissipation system. The fourth liquid inlet 18 of the fourth pipeline heat dissipation system and the fifth liquid inlet 20 of the fifth pipeline heat dissipation system are both connected to a coolant pump. The fourth liquid outlet 19 of the fourth pipeline heat dissipation system and the fifth liquid outlet 21 of the fifth pipeline heat dissipation system are both connected to a coolant cooling device.

[0028] It should also be noted that in embodiments 1-3, a temperature sensor is installed at the outlet of the heat dissipation pipe to monitor the coolant temperature in real time, and the flow rate at the inlet of the heat dissipation pipe is dynamically adjusted by the coolant pump (using a proportional integral valve) to ensure that the coolant temperature at the outlet of the heat dissipation pipe is always maintained at the same level.

[0029] It should also be noted that the positions of the liquid outlet and liquid inlet shown in the attached figure are not limited to those shown in the attached figure and can be adjusted according to the actual use of the motor; furthermore, to prevent vibration, the U-shaped iron core 1 can also be filled with potting compound to fix the heat dissipation pipe.

[0030] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.

[0031] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A heat dissipation structure for a segmented stator, characterized in that, It includes multiple U-shaped iron cores (1) evenly arranged circumferentially, with gaps between the teeth of adjacent U-shaped iron cores (1) and fixedly connected by insulating buckles (2). The yokes of all U-shaped iron cores (1) abut against the stator housing (3). Each U-shaped iron core (1) is provided with a winding coil. The gaps between adjacent U-shaped iron cores (1), insulating buckles (2) and stator housing (3) are filled with potting compound. Heat dissipation pipes (4) are provided axially through the slots of the U-shaped iron cores (1) and the gaps between adjacent U-shaped iron cores (1). Both ends of each heat dissipation pipe are connected to the coolant circulation pipeline.

2. The heat dissipation structure according to claim 1, characterized in that, The first or last end of the adjacent heat dissipation pipes (4) are connected by a first U-shaped pipe (5) to form an S-shaped heat dissipation pipe system. The first liquid inlet (6) and the first liquid outlet (7) of the first heat dissipation pipe system are both connected to the coolant circulation pipe.

3. The heat dissipation structure according to claim 1, characterized in that, The heat dissipation pipe located at the slot of the U-shaped iron core (1) and the heat dissipation pipe (4) located on one side of the U-shaped iron core (1) are connected by a first U-shaped pipe (5) to form a U-shaped heat dissipation pipeline. The U-shaped heat dissipation pipeline includes a first U-shaped heat dissipation pipeline (8) and a second U-shaped heat dissipation pipeline (9). The first U-shaped heat dissipation pipeline (8) and the second U-shaped heat dissipation pipeline (9) are spaced apart. Adjacent first U-shaped heat dissipation pipelines (8) are connected by a second U-shaped pipe (10). All first U-shaped heat dissipation pipelines (8) are connected to form a second heat dissipation pipeline system. Adjacent second U-shaped heat dissipation pipelines (9) are connected by a second U-shaped pipe (10). All second U-shaped heat dissipation pipelines (9) are connected to form a third heat dissipation pipeline system. The second inlet (11) and the second outlet (12) of the second heat dissipation pipeline system are both connected to the coolant circulation pipeline. The third inlet (13) and the third outlet (14) of the third heat dissipation pipeline system are both connected to the coolant circulation pipeline.

4. The heat dissipation structure according to claim 1, characterized in that, Three adjacent heat dissipation pipes (4) are connected by two first U-shaped pipes (5) to form an S-shaped heat dissipation pipeline. The S-shaped heat dissipation pipeline includes a first S-shaped heat dissipation pipeline (15) and a second S-shaped heat dissipation pipeline (16). The first S-shaped heat dissipation pipeline (15) and the second S-shaped heat dissipation pipeline (16) are spaced apart. Adjacent first S-shaped heat dissipation pipelines (15) are arranged in opposite directions and connected by a third U-shaped pipe (17). All first S-shaped heat dissipation pipelines (15) are connected to form a fourth pipeline heat dissipation system. Adjacent second S-shaped heat dissipation pipelines (16) are arranged in opposite directions and connected by a third U-shaped pipe (17). All second S-shaped heat dissipation pipelines (16) are connected to form a fifth pipeline heat dissipation system. The fourth inlet (18) and the fourth outlet (19) of the fourth pipeline heat dissipation system are both connected to the coolant circulation pipeline. The fifth inlet (20) and the fifth outlet (21) of the fifth pipeline heat dissipation system are both connected to the coolant circulation pipeline.

5. The heat dissipation structure according to claim 1, characterized in that, The coolant in the coolant circulation pipeline is a water-based coolant.

6. The heat dissipation structure according to claim 1, characterized in that, The heat dissipation pipe (4) is made of aluminum nitride ceramic matrix composite material.

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