High-efficiency small-size linear motor

Abstract

The invention relates to the technical field of motors, and particularly discloses a high-efficiency small-size linear motor, which comprises a first side plate, a second side plate parallel to the first side plate and a motor base, and is characterized in that multiple groups of stators are arranged on the inner side wall of the first side plate and the inner side wall of the second side plate; the first side plate and the second side plate jointly form a sliding channel, and the motor base slides in the sliding channel in a reciprocating mode. The motor base comprises a rotor assembly, the rotor assembly comprises a plurality of groups of iron cores corresponding to the stators, coils are wound on the outer sides of the iron cores, each iron core comprises a first extension part and a second extension part, the first extension parts are parallel to the stators in the first side plate, and the second extension parts are parallel to the stators in the second side plate; the motor base further comprises a supporting frame which is used for fixing the iron core and the coil to ensure that an air gap between the iron core and the stator is uniform.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular discloses a high-efficiency and small-volume linear motor. Background Art

[0002] In the field of linear motor technology, traditional designs often include a yoke structure, which plays an important role in connecting the magnetic poles and guiding the magnetic lines of force in the motor. However, with the continuous improvement of motor performance requirements, especially the pursuit of miniaturization, lightness and high efficiency, traditional designs have gradually shown their limitations.

[0003] The yoke structure of traditional linear motors not only increases the size and weight of the motor, but also limits the optimal transmission path of the magnetic lines of force. The magnetic lines of force need to bend and diffuse in the yoke, which not only reduces the magnetic flux density but also increases energy loss. In addition, the yoke, as a thermal barrier in the motor, also affects the heat dissipation performance of the motor, making the motor prone to performance degradation and shortened life when running at high temperatures. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, an object of the present invention is to provide a high-efficiency and small-volume linear motor.

[0005] To achieve the above-mentioned purpose, the present invention provides a high-efficiency and small-volume linear motor, comprising a first side plate, a second side plate parallel to the first side plate, and a motor seat, wherein multiple groups of stators are arranged on the inner side wall of the first side plate and the inner side wall of the second side plate; the first side plate and the second side plate jointly form a sliding channel, and the motor seat reciprocates in the sliding channel;

[0006] The motor base includes a mover assembly, which includes multiple groups of iron cores corresponding to the stators, coils are wound around the outside of the iron cores, and the iron cores include a first extension portion and a second extension portion, the first extension portion is parallel to the stator in the first side plate, and the second extension portion is parallel to the stator in the second side plate; the motor base also includes a support frame, which is used to fix the iron cores and the coils to ensure that the air gap between the iron cores and the stator is uniform.

[0007] Each core includes a first extension and a second extension. The first extension is parallel to the stator in the first side plate, and the second extension is parallel to the stator in the second side plate. This design ensures that the core can produce effective electromagnetic interaction with the stators on both sides. By precisely controlling the air gap between the core and the stator and optimizing the electromagnetic interaction, this design significantly improves the efficiency of the motor. This means that with the same input power, a greater output force or faster movement speed can be generated. The introduction of the support frame not only fixes the core and the coil, but also ensures that the relative position between them is stable, thereby improving the operating stability of the motor. This is especially important for applications that require long-term continuous operation.

[0008] The core and coil are integrally molded by injection molding. In the traditional manufacturing process, the core and coil usually need to be manufactured separately and then assembled. The injection molding technology combines these two steps into one step, thereby simplifying the manufacturing process and shortening the production cycle. The injection molding technology can firmly combine the core and coil together to form an integral structure. This enhances the mechanical strength of the motor assembly and improves its ability to resist external shocks and vibrations.

[0009] The coil adopts frameless winding coil or flat coil. Frameless winding coil abandons the traditional coil frame and directly uses a specific process to tightly and neatly wind the wire on the iron core. Frameless winding coil increases the contact area between the coil and the air, which is conducive to heat dissipation and improves the heat dissipation performance of the motor. Flat coil can be highly integrated with other components of the motor, thus saving a lot of space.

[0010] The stator and the mover assembly form an air gap, and the width of the air gap is less than 1 mm. Reducing the air gap width can reduce magnetic resistance, so that more magnetic lines of force can efficiently pass through the air gap, thereby improving electromagnetic conversion efficiency. This means that at the same input power, the motor can produce a greater output force or a higher speed, or reduce energy consumption while maintaining the same output. By reducing the air gap width, the overall volume and weight of the motor can be reduced while maintaining the same performance.

[0011] The motor seat is also provided with a cooling device, which is installed on the side of the support frame close to the coil or the iron core. The cooling device is installed on the side of the support frame close to the coil or the iron core to ensure that the cooling device can directly contact the heat-generating components. The cooling device is a cooling water tank installed on the inner side of the support frame. The side of the cooling water tank away from the support frame is in contact with the coil or the iron core, and a cavity is formed at the bottom of the cooling water tank, and the cavity is used to nest the coil or the iron core. A coolant flow channel is provided in the cooling water tank, and the coolant flow channel is connected to an external cooling device to realize the circulation of the coolant.

[0012] Installing the cooling water tank on the side of the support frame close to the coil or core ensures that the cooling device can directly contact the main heat-generating components of the motor - the coil or core. This direct contact heat dissipation method greatly reduces the path and resistance of heat transfer, improves the heat dissipation efficiency, and enables the motor to operate at a lower temperature, thereby extending the service life of the motor. The design of the cooling water tank not only meets the heat dissipation requirements, but also fully considers the space utilization. By nesting the cooling water tank outside the coil or core, effective heat dissipation is achieved and additional heat dissipation space is saved, which is especially important for high-efficiency and small-volume linear motors.

[0013] Fillers with good thermal conductivity are filled between the cooling water tank and the coil or iron core. Fillers with good thermal conductivity can effectively fill the tiny gap between the cooling water tank and the coil or iron core, reducing the presence of thermal resistance such as air. Since air is a poor conductor of heat, the introduction of fillers can significantly reduce the resistance to heat transfer and improve the efficiency of heat conduction. This allows the heat generated by the coil or iron core to be transferred to the cooling water tank more quickly, and then carried away by the coolant, achieving more effective heat dissipation. Fillers with good thermal conductivity can also play a certain protective role, preventing the coil or iron core from being corroded or damaged due to direct contact with the coolant. At the same time, it can also reduce the relative movement between the coil or iron core and the cooling water tank caused by vibration or impact, thereby reducing wear and noise.

[0014] The motor base is coated with a wear-resistant coating on both sides close to the first side plate and the second side plate, and the wear-resistant coating is used to reduce the friction loss when the motor base moves. The wear-resistant coating is usually composed of materials with high hardness and wear resistance, such as silicon carbide, aluminum oxide, etc. These materials can resist the wear caused by long-term friction between the motor base and the side plate, thereby enhancing the wear resistance of the motor base.

[0015] The stator arrangement array is a Halbach magnet array, which is composed of multiple groups of arrays in sequence, and one group of arrays includes 4 stators arranged along the length direction of the first side plate or the second side plate; the 4 permanent magnets are S magnet, H1 magnet, N magnet and H2 magnet in sequence, the magnetization direction of the S magnet is along the positive direction of the Y axis, the magnetization direction of the N magnet is along the negative direction of the Y axis, the magnetization direction of the H1 magnet is along the positive direction of the X axis, and the magnetization direction of the H2 magnet is along the negative direction of the X axis.

[0016] Because the magnetization direction of the magnets is specially designed, the Halbach magnet array can generate a highly directional magnetic field. This helps reduce magnetic field leakage and interference, and improves the stability and reliability of the motor. Linear motors using the Halbach array can output greater power, thereby improving energy efficiency. This is especially important for applications that require long-term operation and high-efficiency output, which helps reduce energy consumption and operating costs. Compared with traditional magnet array arrangements, the Halbach array can generate greater thrust under the same conditions.

[0017] The stator is made of high magnetic permeability material, and an insulating layer is provided on the surface of the stator to reduce eddy current loss. High magnetic permeability materials (such as silicon steel sheets, Permalloy, etc.) have excellent magnetic conductivity and can more effectively guide and concentrate magnetic field lines, thereby improving the utilization rate of the magnetic field. In linear motors, this helps to enhance the magnetic coupling between the stator and the mover, and improve the output efficiency and performance of the motor. Providing an insulating layer on the surface of the stator of a linear motor can effectively isolate the stator from electrical conductors in the external environment, thereby reducing eddy current losses, and the energy consumption of the linear motor is reduced accordingly. This helps to reduce operating costs, especially in application scenarios that require long-term continuous operation.

[0018] The support frame is U-shaped, and the movable subassembly is accommodated in the U-shaped groove of the support frame. The support frame includes a first main body, a first plate and a second plate integrally formed with two ends of the first main body; the first plate and the second plate protrude a first clamping portion and a second clamping portion from the other end away from the first main body toward a side close to the movable subassembly, and the first clamping portion and the second clamping portion jointly clamp the two ends of the movable subassembly.

[0019] The inner sides of the first clamping portion and the second clamping portion are both provided with elastic buffers, and the elastic buffers are used to reduce vibration and impact between the mover assembly and the support frame.

[0020] The design of the U-shaped support frame makes the structure of the entire motor more compact, which helps to reduce the size and weight of the motor and improve space utilization. This is especially important for linear motors that require small size and lightweight application scenarios. The first clamping portion and the second clamping portion jointly clamp the two ends of the mover assembly to ensure the stability of the mover assembly in the support frame. This clamping method not only simplifies the installation process, but also helps to improve the overall rigidity of the motor. The elastic buffer is arranged on the inner side of the first clamping portion and the second clamping portion and is in direct contact with the mover assembly. These buffers can absorb and disperse the vibration and impact generated by the mover assembly during operation, thereby reducing noise, reducing wear, and extending the service life of the motor.

[0021] The inner side wall of the first side plate and the inner side wall of the second side plate are both provided with a mounting structure for mounting the stator, the mounting structure comprising a plurality of mounting grooves, the mounting grooves being arranged along the length direction of the side plate, the depth of the mounting grooves being one third of the thickness of the stator, elastic fixings being provided around the side walls of the mounting grooves, the elastic fixings being used to abut against the side edges of the stator to prevent the stator from loosening when the motor is running; a heat dissipation channel is provided on the inner side of the first side plate and the second side plate, the heat dissipation channel being connected to the mounting groove, a heat conductive material being provided on the back of the stator for conducting the heat of the stator unit to the heat dissipation channel.

[0022] The multiple mounting grooves arranged on the inner side walls of the first side plate and the second side plate provide precise positioning and fixing points for the installation of the stator. The mounting grooves are arranged along the length direction of the side plate to ensure the uniform distribution and stable installation of the stator in the linear motor. The elastic fixings arranged around the side walls of the mounting grooves can tightly contact the side edges of the stator, effectively preventing the stator from loosening during the operation of the motor. This elastic fixing method not only improves the stability of the stator, but also helps to reduce the noise and wear caused by vibration and impact. The heat dissipation channel arranged on the inner side of the first side plate and the second side plate is connected to the mounting groove to form an effective heat dissipation network. When the heat generated by the stator during operation is conducted to the heat dissipation channel through the heat conductive material, it can be quickly taken away and dissipated into the environment, thereby reducing the temperature rise of the motor and improving the operating efficiency and reliability of the motor.

[0023] A heat pipe is embedded inside the core and connected to a cooling device to enhance the heat dissipation effect. One end of the heat pipe is close to the heat source (such as the high temperature area of ​​the coil or core), and the other end is connected to an external cooling device (such as a heat sink, liquid cooling system, or air cooling system). The heat transfer efficiency of the heat pipe is much higher than that of traditional heat conduction methods, and it can quickly remove the heat from the core to prevent local overheating. The heat pipe can evenly distribute the heat to the entire cooling device, avoiding temperature gradients inside the core, thereby improving the stability and reliability of the motor.

[0024] Pressure sensors are provided in the first and second clamping parts to monitor the force of the mover assembly in real time. The pressure sensors are installed on the inner side of the first and second clamping parts, directly contacting the two ends of the mover assembly; this installation method can directly measure the axial force, radial force and possible impact force of the mover assembly during movement. Through the force data, it can be determined whether the motor is in normal operation. When abnormal force (such as overload or collision) is detected, the protection mechanism is triggered in time to avoid damage to the motor.

[0025] Beneficial effects of the present invention: The present invention significantly improves the efficiency, stability and heat dissipation performance of the motor by optimizing the structural design of the linear motor. Specifically, the use of an integrally-molded core and coil structure by injection molding simplifies the manufacturing process and enhances the mechanical strength; the electromagnetic conversion efficiency and output thrust are improved by precisely controlling the air gap width (less than 1 mm) and using a Halbach magnet array; the cooling device (such as a cooling water tank) directly contacts the heat-generating components, combined with thermally conductive fillers and heat dissipation channels, effectively reducing the temperature rise of the motor; the design of the elastic fixings and the U-shaped support frame ensures the stability of the stator and mover assemblies, and reduces vibration and impact; the application of wear-resistant coatings and insulating layers further extends the service life of the motor and reduces energy consumption. These innovative designs give the motor significant advantages in terms of high efficiency, small size, low energy consumption and long life, and are suitable for high-precision, high-reliability application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the mover assembly of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the stator arrangement of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the support frame of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the first side plate or the second side plate of the present invention.

[0031] Reference numerals include:

[0032] 1. First side panel; 2. Second side panel; 3. Motor seat; 4. Stator; 5. Sliding channel; 6. Mover assembly; 7. Iron core; 8. Coil; 9. First extension portion; 11. Second extension portion; 12. Support frame; 13. Cooling device; 14. S magnet; 15. H1 magnet; 16. N magnet; 17. H2 magnet; 18. First body; 19. First plate; 21. Second plate; 22. First clamping portion; 23. Second clamping portion; 24. Elastic buffer; 25. Mounting groove; 26. Elastic fixing member; 27. Heat dissipation channel. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0034] See also Figures 1 to 5 As shown, a high-efficiency and small-volume linear motor of the present invention comprises a first side plate 1, a second side plate 2 parallel to the first side plate 1, and a motor seat 3, wherein multiple groups of stators 4 are arranged on the inner side wall of the first side plate 1 and the inner side wall of the second side plate 2; the first side plate 1 and the second side plate 2 jointly form a sliding channel 5, and the motor seat 3 reciprocates in the sliding channel 5;

[0035] The motor base 3 includes a mover assembly 6, which includes a plurality of groups of iron cores 7 corresponding to the stator 4, and a coil 8 is wound around the outer side of the iron core 7. The iron core 7 includes a first extension portion 9 and a second extension portion 11. The first extension portion 9 is parallel to the stator 4 in the first side plate 1, and the second extension portion 11 is parallel to the stator 4 in the second side plate 2; the motor base 3 also includes a support frame 12, which is used to fix the iron core 7 and the coil 8 to ensure that the air gap between the iron core 7 and the stator 4 is uniform.

[0036] Each core 7 includes a first extension 9 and a second extension 11. The first extension 9 is parallel to the stator 4 in the first side plate 1, and the second extension 11 is parallel to the stator 4 in the second side plate 2. This design ensures that the core 7 can produce effective electromagnetic interaction with the stators 4 on both sides. By precisely controlling the air gap between the core 7 and the stator 4 and optimizing the electromagnetic interaction, the design significantly improves the efficiency of the motor. This means that with the same input power, a greater output force or a faster moving speed can be generated. The introduction of the support frame 12 not only fixes the core 7 and the coil 8, but also ensures that the relative position between them is stable, thereby improving the operating stability of the motor. This is particularly important for applications that require long-term continuous operation.

[0037] The iron core 7 and the coil 8 are integrally formed by injection molding. In the traditional manufacturing process, the iron core 7 and the coil 8 usually need to be manufactured separately and then assembled. The injection molding technology combines these two steps into one step, thereby simplifying the manufacturing process and shortening the production cycle. The injection molding technology can firmly combine the iron core 7 and the coil 8 to form an integral structure. This enhances the mechanical strength of the motor assembly and improves its ability to resist external shocks and vibrations.

[0038] The coil 8 adopts a frameless winding coil 8 or a flat coil 8. The frameless winding coil 8 abandons the traditional coil 8 frame and directly uses a specific process to tightly and neatly wind the wire on the iron core 7. The frameless winding coil 8 increases the contact area between the coil 8 and the air, which is conducive to heat dissipation and improves the heat dissipation performance of the motor. The flat coil 8 can be highly integrated in other components of the motor, thereby saving a lot of space.

[0039] The stator 4 and the mover assembly 6 form an air gap, and the width of the air gap is less than 1 mm. Reducing the air gap width can reduce magnetic resistance, so that more magnetic lines of force can efficiently pass through the air gap, thereby improving electromagnetic conversion efficiency. This means that under the same input power, the motor can produce a greater output force or a higher speed, or reduce energy consumption while maintaining the same output. By reducing the air gap width, the overall volume and weight of the motor can be reduced while maintaining the same performance.

[0040] A cooling device 13 is also provided on the motor base 3, and the cooling device 13 is installed on one side of the support frame 12 close to the coil 8 or the iron core 7. Installing the cooling device 13 on one side of the support frame 12 close to the coil 8 or the iron core 7 ensures that the cooling device 13 can directly contact the heating components. The cooling device 13 is a cooling water tank installed inside the support frame 12. One side of the cooling water tank away from the support frame 12 abuts against the coil 8 or the iron core 7, and a cavity is formed at the bottom of the cooling water tank for nesting the coil 8 or the iron core 7. A coolant flow channel is provided in the cooling water tank, and the coolant flow channel is communicated with an external cooling device for realizing the circulating flow of the coolant.

[0041] Installing the cooling water tank on one side of the support frame 12 close to the coil 8 or the iron core 7 ensures that the cooling device 13 can directly contact the main heating components of the motor, namely the coil 8 or the iron core 7. This direct-contact heat dissipation method greatly reduces the heat transfer path and resistance, improves the heat dissipation efficiency, enables the motor to operate at a lower temperature, and thus extends the service life of the motor. The design of the cooling water tank not only meets the heat dissipation requirements but also fully considers the space utilization. By nesting the cooling water tank outside the coil 8 or the iron core 7, effective heat dissipation is achieved while saving additional heat dissipation space, which is particularly important for high-efficiency and small-size linear motors.

[0042] A filler with good thermal conductivity is filled between the cooling water tank and the coil 8 or the iron core 7. The filler with good thermal conductivity can effectively fill the tiny gaps between the cooling water tank and the coil 8 or the iron core 7 and reduce the existence of thermal resistance such as air. Since air is a poor conductor of heat, the introduction of the filler can significantly reduce the heat transfer resistance and improve the heat conduction efficiency. This enables the heat generated by the coil 8 or the iron core 7 to be transferred to the cooling water tank faster and then taken away by the coolant, realizing more effective heat dissipation. The filler with good thermal conductivity can also play a certain protective role, preventing the coil 8 or the iron core 7 from being corroded or damaged due to direct contact with the coolant. At the same time, it can also reduce the relative movement between the coil 8 or the iron core 7 and the cooling water tank caused by vibration or impact, thereby reducing wear and noise.

[0043] Wear-resistant coatings are applied to both sides of the motor base 3 close to the first side plate 1 and the second side plate 2, and the wear-resistant coatings are used to reduce the frictional loss when the motor base 3 moves. The wear-resistant coatings are usually composed of materials with high hardness and wear resistance, such as silicon carbide, alumina, etc. These materials can resist the wear caused by long-term friction between the motor base 3 and the side plates, thereby enhancing the wear resistance of the motor base 3.

[0044] The stator 4 arrangement array is a Halbach magnet array, which is composed of multiple groups of arrays in sequence, and one group of arrays includes 4 stators 4 arranged along the length direction of the first side plate 1 or the second side plate 2; the 4 permanent magnets are S magnet 14, H1 magnet 15, N magnet 16 and H2 magnet 17 in sequence, the magnetization direction of the S magnet 14 is along the positive direction of the Y axis, the magnetization direction of the N magnet 16 is along the negative direction of the Y axis, the magnetization direction of the H1 magnet 15 is along the positive direction of the X axis, and the magnetization direction of the H2 magnet 17 is along the negative direction of the X axis.

[0045] Because the magnetization direction of the magnets is specially designed, the Halbach magnet array can generate a highly directional magnetic field. This helps reduce magnetic field leakage and interference, and improves the stability and reliability of the motor. Linear motors using the Halbach array can output greater power, thereby improving energy efficiency. This is especially important for applications that require long-term operation and high-efficiency output, which helps reduce energy consumption and operating costs. Compared with traditional magnet array arrangements, the Halbach array can generate greater thrust under the same conditions.

[0046] The stator 4 is made of a high magnetic permeability material, and an insulating layer is provided on the surface of the stator 4 to reduce eddy current losses. High magnetic permeability materials (such as silicon steel sheets, Permalloy, etc.) have excellent magnetic conductivity and can more effectively guide and concentrate magnetic field lines, thereby improving the utilization rate of the magnetic field. In a linear motor, this helps to enhance the magnetic coupling between the stator 4 and the mover, and improve the output efficiency and performance of the motor. An insulating layer is provided on the surface of the stator 4 of the linear motor, which can effectively isolate the stator 4 from the electrical conductors in the external environment, thereby reducing eddy current losses, and the energy consumption of the linear motor is reduced accordingly. This helps to reduce operating costs, especially in application scenarios that require long-term continuous operation.

[0047] The support frame 12 is U-shaped, and the movable subassembly 6 is accommodated in the U-shaped groove of the support frame 12. The support frame 12 includes a first main body 18, a first plate 19 and a second plate 21 integrally formed with both ends of the first main body 18; the first plate 19 and the second plate 21 protrude a first clamping portion 22 and a second clamping portion 23 from the other end away from the first main body 18 toward the side close to the movable subassembly 6, and the first clamping portion 22 and the second clamping portion 23 jointly clamp the two ends of the movable subassembly 6.

[0048] Elastic buffers 24 are disposed on the inner sides of the first clamping portion 22 and the second clamping portion 23 . The elastic buffers 24 are used to reduce vibration and impact between the mover assembly 6 and the support frame 12 .

[0049] The design of the U-shaped support frame 12 makes the structure of the entire motor more compact, helps to reduce the size and weight of the motor, and improves space utilization. This is especially important for linear motors that require small size and lightweight application scenarios. The first clamping portion 22 and the second clamping portion 23 jointly clamp the two ends of the mover assembly 6 to ensure the stability of the mover assembly 6 in the support frame 12. This clamping method not only simplifies the installation process, but also helps to improve the overall rigidity of the motor. The elastic buffer 24 is arranged on the inner side of the first clamping portion 22 and the second clamping portion 23, and is in direct contact with the mover assembly 6. These buffers can absorb and disperse the vibration and impact generated by the mover assembly 6 during operation, thereby reducing noise, reducing wear, and extending the service life of the motor.

[0050] The inner side wall of the first side plate 1 and the inner side wall of the second side plate 2 are both provided with a mounting structure for mounting the stator 4, and the mounting structure includes a plurality of mounting grooves 25, and the mounting grooves 25 are arranged along the length direction of the side plate, and the depth of the mounting grooves 25 is one third of the thickness of the stator 4, and elastic fixing members 26 are provided around the side walls of the mounting grooves 25, and the elastic fixing members 26 are used to abut against the side of the stator 4 to prevent the stator 4 from loosening when the motor is running; the inner sides of the first side plate 1 and the second side plate 2 are provided with a heat dissipation channel 27, and the heat dissipation channel 27 is communicated with the mounting groove 25, and a heat conductive material is provided on the back of the stator 4 for conducting the heat of the stator 4 to the heat dissipation channel 27.

[0051] The multiple mounting grooves 25 arranged on the inner side walls of the first side plate 1 and the second side plate 2 provide precise positioning and fixing points for the installation of the stator 4. The mounting grooves 25 are arranged along the length direction of the side plate to ensure the uniform distribution and stable installation of the stator 4 in the linear motor. The elastic fixing members 26 arranged around the side walls of the mounting grooves 25 can tightly contact the side edges of the stator 4, effectively preventing the stator 4 from loosening during the operation of the motor. This elastic fixing method not only improves the stability of the stator 4, but also helps to reduce the noise and wear caused by vibration and impact. The heat dissipation channel 27 arranged on the inner side of the first side plate 1 and the second side plate 2 is connected to the mounting groove 25 to form an effective heat dissipation network. When the heat generated by the stator 4 during operation is conducted to the heat dissipation channel 27 through the heat conductive material, it can be quickly taken away and dissipated into the environment, thereby reducing the temperature rise of the motor and improving the operating efficiency and reliability of the motor.

[0052] A heat pipe is embedded inside the iron core 7, and the heat pipe is connected to the cooling device 13. The heat pipe is used to enhance the heat dissipation effect. One end of the heat pipe is close to the heat source (such as the high temperature area of ​​the coil 8 or the iron core 7), and the other end is connected to the external cooling device 13 (such as a heat sink, a liquid cooling system or an air cooling system). The heat transfer efficiency of the heat pipe is much higher than that of the traditional heat conduction method, and the heat inside the iron core 7 can be quickly discharged to prevent local overheating. The heat pipe can evenly distribute the heat to the entire cooling device 13, avoiding the temperature gradient inside the iron core 7, thereby improving the stability and reliability of the motor.

[0053] Pressure sensors are provided in the first clamping part 22 and the second clamping part 23 for real-time monitoring of the force of the mover assembly 6. The pressure sensors are installed on the inner side of the first clamping part 22 and the second clamping part 23, directly contacting the two ends of the mover assembly 6; this installation method can directly measure the axial force, radial force and possible impact force of the mover assembly 6 during movement. Through the force data, it can be judged whether the motor is in normal operation. When abnormal force (such as overload or collision) is detected, the protection mechanism is triggered in time to avoid damage to the motor.

[0054] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A high-efficiency and small-volume linear motor, characterized in that: The invention comprises a first side plate (1), a second side plate (2) parallel to the first side plate (1), and a motor seat (3); a plurality of stators (4) are arranged on the inner side wall of the first side plate (1) and the inner side wall of the second side plate (2); the first side plate (1) and the second side plate (2) together form a sliding channel (5), and the motor seat (3) slides back and forth in the sliding channel (5); The motor base (3) includes a mover assembly (6), the mover assembly (6) includes a plurality of groups of iron cores (7) corresponding to the stator (4), a coil (8) is wound around the outer side of the iron core (7), the iron core (7) includes a first extension portion (9) and a second extension portion (11), the first extension portion (9) is parallel to the stator (4) in the first side plate (1), and the second extension portion (11) is parallel to the stator (4) in the second side plate (2); the motor base (3) also includes a support frame (12), the support frame (12) is used to fix the iron core (7) and the coil (8) to ensure that the air gap between the iron core (7) and the stator (4) is uniform.

2. A high-efficiency and small-volume linear motor according to claim 1, characterized in that: The iron core (7) and the coil (8) are integrally formed by injection molding.

3. The high-efficiency and small-volume linear motor according to claim 1, characterized in that: The stator (4) and the mover assembly (6) form an air gap, and the width of the air gap is less than 1 mm.

4. The high-efficiency and small-volume linear motor according to claim 1, characterized in that: The motor base (3) is also provided with a cooling device (13), which is installed on a side of the support frame (12) close to the coil (8) or the iron core (7).

5. The high-efficiency and small-volume linear motor according to claim 1, characterized in that: Both sides of the motor base (3) close to the first side plate (1) and the second side plate (2) are coated with a wear-resistant coating, and the wear-resistant coating is used to reduce friction loss when the motor base (3) moves.

6. The high-efficiency and small-volume linear motor according to claim 1, characterized in that: The stator (4) arrangement array is a Halbach magnet array, which is composed of multiple groups of arrays in sequence, and one group of arrays includes four stators (4) arranged along the length direction of the first side plate (1) or the second side plate (2); the four permanent magnets are S magnets (14), H1 magnets (15), N magnets (16) and H2 magnets (17) in sequence, the magnetization direction of the S magnet (14) is along the positive direction of the Y axis, the magnetization direction of the N magnet (16) is along the negative direction of the Y axis, the magnetization direction of the H1 magnet (15) is along the positive direction of the X axis, and the magnetization direction of the H2 magnet (17) is along the negative direction of the X axis.

7. The high-efficiency and small-volume linear motor according to claim 1, characterized in that: The stator (4) is made of a material with high magnetic permeability, and an insulating layer is provided on the surface of the stator (4) to reduce eddy current loss.

8. The high-efficiency and small-volume linear motor according to claim 1, characterized in that: The support frame (12) is U-shaped, and the movable subassembly (6) is accommodated in the U-shaped groove of the support frame (12). The support frame (12) comprises a first main body (18), a first plate member (19) and a second plate member (21) integrally formed with two ends of the first main body (18); the first plate member (19) and the second plate member (21) protrude a first clamping portion (22) and a second clamping portion (23) from the other end away from the first main body (18) toward a side close to the movable subassembly (6), and the first clamping portion (22) and the second clamping portion (23) jointly clamp the two ends of the movable subassembly (6).

9. The high-efficiency and small-volume linear motor according to claim 8, characterized in that: An elastic buffer (24) is provided on the inner side of the first clamping portion (22) and the inner side of the second clamping portion (23), and the elastic buffer (24) is used to reduce vibration and impact between the mover assembly (6) and the support frame (12).

10. The high-efficiency and small-volume linear motor according to claim 1, characterized in that: The inner side wall of the first side plate (1) and the inner side wall of the second side plate (2) are both provided with a mounting structure for mounting the stator (4), the mounting structure comprising a plurality of mounting grooves (25), the mounting grooves (25) being arranged along the length direction of the side plate, the depth of the mounting grooves (25) being one third of the thickness of the stator (4), elastic fixing members (26) being provided around the side walls of the mounting grooves (25), the elastic fixing members (26) being used to abut against the side edge of the stator (4) to prevent the stator (4) from loosening when the motor is running; the inner sides of the first side plate (1) and the second side plate (2) are provided with a heat dissipation channel (27), the heat dissipation channel (27) being in communication with the mounting grooves (25), and the back side of the stator (4) being provided with a heat conducting material for conducting the heat of the stator (4) unit to the heat dissipation channel (27).

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