Motor stator core with good heat dissipation

Abstract

The utility model discloses a motor stator core with good heat dissipation, which comprises a punching sheet, the outer surface of the punching sheet is provided with a plurality of embedding grooves, the interiors of the embedding grooves are connected with heat dissipation blocks in a sliding manner, the left and right sides of the outer surface of each heat dissipation block are fixedly connected with limiting bumps, the front surface of each heat dissipation block is provided with three cooling pipe grooves, and the three cooling pipe grooves are connected with the limiting bumps in a sliding manner. And a plurality of thermal expansion adaptive grooves are formed in the outer surfaces of the three cooling pipe grooves. Modularized heat dissipation units are formed through the embedding grooves in the outer surfaces of the punching sheets and the heat dissipation blocks, heat is conducted through direct contact between metals, the temperature rise of the stator core is remarkably reduced, the service life of the motor is prolonged, the sizes of the heat dissipation blocks and the embedding grooves are accurately matched, heat resistance generated by contact gaps can be reduced, and the heat conduction efficiency is further improved. When the cooling liquid in the cooling pipe is heated and expands, the thermal expansion adaptive groove absorbs the stress of the pipeline through deformation, thereby preventing the cracking of the cooling pipe or the leakage of the interface caused by thermal expansion, and improving the stability of the motor in an extreme environment.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor stator core with good heat dissipation. Background Technology

[0002] Early electric motors had relatively low performance requirements, and their stator core structures and materials were relatively simple. With industrial development, the application scenarios for electric motors have continuously expanded, such as in industrial drives, transportation, and home appliances. This has placed higher demands on motor performance indicators such as efficiency, power density, and reliability, prompting continuous development of stator core technology. For example, drive motors for new energy vehicles require high-power-density and high-efficiency stator cores to extend the vehicle's driving range; high-precision motors in industrial automation require stator cores that can provide a more stable magnetic field to ensure precise motor control.

[0003] However, for high-precision control scenarios such as servo motors and frequency converters, magnetic field distortion caused by overheating of the iron core can lead to back electromotive force fluctuations, affecting the speed control accuracy and dynamic response performance of the motor, which may result in a decrease in the accuracy of processing equipment or instability in the operation of automated systems. Utility Model Content

[0004] The purpose of this invention is to provide a motor stator core with good heat dissipation. A modular heat dissipation unit is formed by the fitting groove on the outer surface of the lamination and the heat sink. Heat is conducted through direct contact between the metals, which significantly reduces the temperature rise of the stator core and extends the service life of the motor. The dimensions of the heat sink and the fitting groove are precisely matched, which can reduce the thermal resistance generated by the contact gap and further improve the heat conduction efficiency.

[0005] To achieve the above objectives, a motor stator core with good heat dissipation is provided, comprising: a lamination, the outer surface of which has several fitting grooves, a heat sink slidably connected inside the fitting grooves, limiting protrusions fixedly connected to both sides of the outer surface of the heat sink, and three cooling pipe slots on the front surface of the heat sink, each of which has several thermal expansion fitting grooves on its outer surface. Through the modular design of the fitting grooves and heat sink, combined with the limiting protrusions and thermal expansion fitting grooves, heat dissipation efficiency and structural stability are improved.

[0006] The number of heat sinks and the number of fitting slots are set in a corresponding manner, and the number of cooling pipe slots and the number of heat sinks are set in a corresponding manner. The corresponding arrangement of quantities forms a complete heat dissipation array, ensuring that heat from each area can be effectively dissipated through dedicated channels.

[0007] The number of laminations is several, and the size of the heat sink is adapted to the size of the fitting groove. The laminations are stacked to increase the heat dissipation area, and the size adaptation reduces the contact thermal resistance to enhance the heat conduction efficiency.

[0008] The inner wall of the lamination has a number of winding slots, the number of which corresponds to the number of laminations. This correspondence between the number of winding slots and the number of laminations ensures a uniform winding layout and facilitates efficient heat transfer to the heat dissipation module.

[0009] The above-mentioned solution has the following beneficial effects:

[0010] This utility model is equipped with a fitting groove, a heat sink, a limiting protrusion, a cooling pipe groove, and a thermal expansion adapter groove. The fitting groove on the outer surface of the lamination and the heat sink form a modular heat dissipation unit. Heat is conducted through direct contact between metals, which significantly reduces the temperature rise of the stator core and extends the service life of the motor. The dimensions of the heat sink and the fitting groove are precisely matched, which can reduce the thermal resistance generated by the contact gap and further improve the heat conduction efficiency. Attached Figure Description

[0011] Figure 1 This is a perspective view of a motor stator core with good heat dissipation according to the present invention.

[0012] Figure 2 This is a front view of a motor stator core with good heat dissipation according to the present invention.

[0013] Figure 3 This is a three-dimensional cross-sectional view of a motor stator core with good heat dissipation according to the present invention.

[0014] Figure 4 For utility model Figure 3 Enlarged view of the structure at point A in the middle.

[0015] Legend:

[0016] 1. Stamping sheet; 2. Winding groove; 3. Fitting groove; 4. Heat sink block; 5. Limiting protrusion; 6. Cooling pipe groove; 7. Thermal expansion adapter groove. Detailed Implementation

[0017] Reference Figure 1-4This utility model relates to a motor stator core with good heat dissipation, comprising a lamination 1. The outer surface of the lamination 1 has several fitting grooves 3, which provide a mounting and positioning structure for a heat sink 4. Through shape adaptation, a stable connection is achieved between the heat sink 4 and the lamination 1, forming a basic assembly unit for the heat dissipation module. The heat sink 4 is slidably connected inside the fitting grooves 3. After the heat sink 4 is embedded in the fitting grooves 3, its contact surface with the lamination 1 forms a heat conduction path, quickly dissipating the heat generated by the lamination 1 during operation to the heat sink 4 body. Limiting protrusions 5 are fixedly connected to both the left and right sides of the outer surface of the heat sink 4. The protrusion 5 engages with the limiting groove on the inner wall of the fitting groove 3 to prevent the heat sink 4 from moving axially within the fitting groove 3, thus ensuring the structural stability of the heat sink module. The front surface of the heat sink 4 is provided with three cooling pipe grooves 6, which provide installation space for the cooling pipes. The flow of coolant in the cooling pipes carries away the heat conducted by the heat sink 4, forming a forced heat dissipation circuit. The outer surface of each of the three cooling pipe grooves 6 is provided with several thermal expansion adapter grooves 7. The thermal expansion adapter grooves 7 are designed with a flexible structure to adapt to the thermal expansion deformation of the cooling pipes under high temperature conditions, thus avoiding damage to the cooling pipes or heat sink 4 due to stress concentration.

[0018] The number of heat sinks 4 corresponds to the number of fitting slots 3. This correspondence ensures that each fitting slot 3 is equipped with a heat sink 4, forming a complete heat dissipation array and avoiding heat dissipation blind spots in local areas of the lamination 1. The number of cooling pipe slots 6 corresponds to the number of heat sinks 4. Each heat sink 4 is equipped with an independent cooling pipe slot 6, allowing the heat from a single heat sink 4 to be directionally discharged through the cooling pipes in its dedicated cooling pipe slot 6, improving the targeting and efficiency of the heat dissipation system. There are several laminations 1, and several laminations 1 are stacked to form the stator core body. The array of fitting slots 3 on its outer surface and the heat sinks... The heat blocks 4 together form a multi-level heat dissipation structure, which expands the overall heat dissipation area. The size of the heat dissipation block 4 and the size of the fitting groove 3 are matched. The precise matching size ensures that the heat dissipation block 4 and the fitting groove 3 are in close contact, reducing contact thermal resistance and improving the heat conduction efficiency from the lamination 1 to the heat dissipation block 4. The inner wall of the lamination 1 is provided with several winding grooves 2. The winding grooves 2 are used to fix the winding coil. Their number corresponds to the number of laminations 1, ensuring that the winding layout of each layer of laminations 1 is consistent and forming a uniform electromagnetic induction area. At the same time, the heat generated by the winding can be conducted to the external heat dissipation module through the lamination 1.

[0019] First, several laminations 1 are stacked according to design requirements to form the stator core body, ensuring that the winding slots 2 of each lamination 1 are aligned. Then, winding coils are embedded in the winding slots 2 to form the core structure of electromagnetic induction. The heat generated by the winding is conducted through the metal material of the laminations 1 to the fitting slots 3 on the outer surface. The heat sinks are positioned and installed in the fitting slots. According to the number of fitting slots 3, a corresponding number of heat sinks 4 are selected and embedded into the slots along the sliding direction of the fitting slots 3. Since the size of the heat sink 4 is precisely matched with the fitting slot 3, the contact surface of the two forms a low thermal resistance conduction path. The heat on the outer surface of the laminations 1 is quickly transferred to the heat sink 4 body. At the same time, the limiting protrusions 5 on both sides of the heat sink 4 engage with the limiting grooves on the inner wall of the fitting slot 3 to prevent the heat sink 4 from moving axially, ensuring the stability of the heat dissipation module structure. The cooling pipes are connected to the cooling pipes. The slots are installed in the three cooling pipe slots 6 on the front surface of each heat sink 4, and the cooling pipes are embedded in them respectively. The cooling pipe slots 6 provide customized installation space for the cooling pipes. When the coolant passes through the cooling pipes, it absorbs the heat conducted by the heat sink 4, forming a forced heat dissipation circuit. The thermal expansion adaptation slots 7 on the outer surface of the cooling pipes are designed with a flexible structure to adapt to the thermal expansion deformation of the cooling pipes after the coolant heats up, avoiding damage to the pipes due to stress. The heat dissipation system operates in conjunction with the motor. When the motor is running, the winding coil generates electromagnetic induction in the winding slot 2, and the heat generated is conducted to the heat sink 4 through the lamination 1. The heat sink 4 transfers the heat to the circulating coolant through the cooling pipes in the cooling pipe slots 6. The coolant carries the heat and flows through the external heat dissipation device to complete the heat exchange, ultimately achieving continuous cooling of the stator core and ensuring that the motor works stably in an efficient heat dissipation environment.

Claims

1. A motor stator core with good heat dissipation, characterized in that: The device includes a lamination (1), the outer surface of which is provided with several fitting grooves (3), a heat sink (4) is slidably connected inside the fitting groove (3), and a limiting protrusion (5) is fixedly connected to the left and right sides of the outer surface of the heat sink (4). The front surface of the heat sink (4) is provided with three cooling pipe grooves (6), and the outer surface of the three cooling pipe grooves (6) is provided with several thermal expansion fitting grooves (7).

2. The motor stator core with good heat dissipation according to claim 1, characterized in that: The number of heat sinks (4) and the number of fitting slots (3) are set in a corresponding manner, and the number of cooling pipe slots (6) and the number of heat sinks (4) are set in a corresponding manner.

3. The motor stator core with good heat dissipation according to claim 1, characterized in that: The number of the laminations (1) is several, and the size of the heat sink (4) is adapted to the size of the fitting groove (3).

4. The motor stator core with good heat dissipation according to claim 1, characterized in that: The inner wall of the lamination (1) is provided with a number of winding grooves (2), and the number of winding grooves (2) corresponds to the number of laminations (1).

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