A high efficiency small volume linear motor

Abstract

The application relates to the motor technical field, in particular to 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, the inner side walls of the first side plate and the second side plate are both arranged with multiple groups of stators; the first side plate and the second side plate jointly form a sliding channel, and the motor base reciprocatingly slides in the sliding channel; the motor base comprises a mover assembly, the mover assembly comprises multiple groups of iron cores corresponding to the stators, the outer sides of the iron cores are wound with coils, the iron cores comprise first extension parts and second extension parts, 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, the supporting frame is used for fixing the iron cores and the coils and ensuring that air gaps between the iron cores and the stators are uniform.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, and particularly discloses a high-efficiency small-size linear motor. BACKGROUND

[0002] In the technical field of linear motors, traditional designs often include a yoke structure, which plays an important role in connecting the magnetic poles and guiding the magnetic lines in the motor. However, with the increasing demand for motor performance, especially the pursuit of miniaturization, lightweight, and high efficiency, the traditional design gradually shows its limitations.

[0003] The yoke structure of traditional linear motors not only increases the volume and weight of the motor, but also limits the optimal transmission path of the magnetic lines. The magnetic lines need to undergo bending and diffusion in the yoke, which not only reduces the magnetic flux density but also increases energy loss. In addition, as a thermal barrier in the motor, the yoke also affects the heat dissipation performance of the motor, making it prone to performance degradation and shortened life when operating at high temperatures. SUMMARY

[0004] In order to overcome the shortcomings and deficiencies existing in the prior art, the purpose of the present application is to provide a high-efficiency small-size linear motor.

[0005] To achieve the above-mentioned purpose, a high-efficiency small-size linear motor of the present application includes a first side plate, a second side plate parallel to the first side plate, and a motor base. The inner side walls of the first side plate and the second side plate are both arranged with multiple groups of stators. The first side plate and the second side plate together form a sliding channel, and the motor base reciprocally slides in the sliding channel.

[0006] The motor base includes a mover assembly, which includes multiple groups of cores corresponding to the stators. The cores are externally wound with coils. The cores include 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. The motor base also includes a support frame for fixing the cores and coils to ensure uniform air gaps between the cores and the stators.

[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 cores can effectively interact with the stators on both sides. By precisely controlling the air gap between the cores and the stators and optimizing the electromagnetic interaction, this design significantly improves the efficiency of the motor. This means that with the same input power, more output force or faster moving speed can be generated. The introduction of the support frame not only fixes the cores and coils but also ensures the stability of their relative positions, thereby improving the running stability of the motor. This is particularly important for applications that require long-term continuous operation.

[0008] The iron core and the coil are integrally formed by injection molding. In the traditional manufacturing process, the iron core and the coil usually need to be manufactured separately and then assembled. The injection molding technology integrates the two steps into one, thereby simplifying the manufacturing process and shortening the production cycle. The injection molding technology can firmly combine the iron core and the coil together to form a whole structure. This enhances the mechanical strength of the motor assembly and improves its ability to resist external impact and vibration.

[0009] The coil adopts a skeleton-free winding coil or a flat coil. The skeleton-free winding coil discards the traditional coil skeleton and directly uses a specific process to tightly and neatly wind the wire on the iron core. The skeleton-free winding coil increases the contact area between the coil and the air, which is beneficial to heat dissipation and improves the heat dissipation performance of the motor. The flat coil can be highly integrated in other components of the motor, thereby 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 1mm. Reducing the air gap width can reduce the magnetic resistance, allowing more magnetic lines to pass through the air gap efficiently, thereby improving the electromagnetic conversion efficiency. This means that under the same input power, the motor can produce greater output force or higher speed, or reduce energy consumption while maintaining the same output. By reducing the air gap width, the overall size and weight of the motor can be reduced while maintaining the same performance.

[0011] The motor base 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, ensuring that the cooling device can directly contact the heat generating components. The cooling device is a cooling water tank installed inside 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, forming a cavity at the bottom of the cooling water tank for nesting the coil or the iron core. The cooling water tank is provided with a cooling liquid flow channel, which is in communication with the external cooling device for realizing the circulation of the cooling liquid.

[0012] The cooling water tank is installed on the side of the support frame close to the coil or the iron core, ensuring that the cooling device can directly contact the main heat generating components of the motor, i.e. the coil or the iron core. This direct contact cooling method greatly reduces the path and resistance of heat transfer, improves the cooling efficiency, and enables the motor to operate at a lower temperature, thereby prolonging the service life of the motor. The design of the cooling water tank not only meets the cooling demand, but also fully considers the space utilization. By nesting the cooling water tank outside the coil or the iron core, effective cooling is achieved while saving additional cooling space, which is particularly important for high-efficiency small-size linear motors.

[0013] A good thermal conductivity filler is filled between the cooling water tank and the coil or core. The good thermal conductivity filler can effectively fill the small gap between the cooling water tank and the coil or core, reducing the presence of air and other thermal resistance. Since air is a poor conductor of heat, the introduction of the filler can significantly reduce the resistance of heat transfer and improve the efficiency of heat conduction. This allows the heat generated by the coil or core to be transferred more quickly to the cooling water tank, which is then carried away by the coolant, achieving more effective heat dissipation. The good thermal conductivity filler can also provide some protection, preventing the coil or core from being corroded or damaged by direct contact with the coolant. At the same time, it can also reduce the relative movement between the coil or 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 near the first and second side plates, which reduces frictional wear 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 and tear between the motor base and the side plates caused by long-term friction, thereby enhancing the wear resistance of the motor base.

[0015] The stator array is a Halbach magnet array, which is composed of multiple arrays in sequence, and each array includes four stators arranged along the length of the first or second side plate. The four 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 Y axis, the magnetization direction of the N magnet is along the negative Y axis, the magnetization direction of the H1 magnet is along the positive X axis, and the magnetization direction of the H2 magnet is along the negative X axis.

[0016] Due to the special design of the magnetization direction of the magnets, the Halbach magnet array can generate a highly directional magnetic field. This helps to reduce magnetic field leakage and interference, improving the stability and reliability of the motor. The linear motor using the Halbach array can output more power, thereby improving the energy efficiency. This is particularly important for applications that require long-term operation and high-power output, helping to reduce energy consumption and operating costs. Compared with traditional magnet array arrangement, 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 and permalloy have excellent magnetic conductivity, which 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 and the mover, improving the output efficiency and performance of the motor. By providing an insulating layer on the surface of the linear motor stator, the stator can be effectively isolated from external electrical conductors, reducing eddy current loss and reducing the energy consumption of the linear motor. This helps to reduce operating costs, especially in applications that require long-term continuous operation.

[0018] The support frame is U-shaped, and the mover assembly is accommodated in the U-shaped groove of the support frame. The support frame includes a first main body, a first plate integrally formed at both ends of the first main body, and a second plate. The other end of the first plate and the second plate away from the first main body protrudes towards the side close to the mover assembly, and the first clamping part and the second clamping part are provided on the other end of the first plate and the second plate away from the first main body. The first clamping part and the second clamping part jointly clamp the two ends of the mover assembly.

[0019] The inner side of the first clamping part and the inner side of the second clamping part are provided with elastic buffers, which are used to reduce the 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 volume and weight of the motor and improve the space utilization. This is particularly important for linear motors that require small size and lightweight applications. The first clamping part and the second clamping part jointly clamp the two ends of the mover assembly, ensuring 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 buffers are provided on the inner side of the first clamping part and the second clamping part, and directly contact 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 tear, and prolonging 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 provided with mounting structures for mounting the stator, which include a plurality of mounting grooves arranged along the length direction of the side plate. The depth of the mounting groove is one-third of the thickness of the stator, and the inner side wall of the mounting groove is provided with elastic fixing parts. The elastic fixing parts are used to resist the side edges of the stator to prevent the stator from loosening during motor operation. The inner side of the first side plate and the second side plate is provided with a heat dissipation channel, which is in communication with the mounting groove. The back of the stator is provided with a heat-conducting material for conducting heat from the stator unit to the heat dissipation channel.

[0022] The plurality of 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 stator. The mounting grooves are arranged along the length direction of the side plates, ensuring uniform distribution and stable installation of the stator in the linear motor. The elastic fixing members arranged around the side walls of the mounting grooves can tightly abut against the side edges of the stator, effectively preventing the stator from loosening during motor operation. This elastic fixing method not only improves the stability of the stator, but also helps to reduce noise and wear caused by vibration and impact. The heat dissipation channels arranged on the inner sides of the first side plate and the second side plate are connected with the mounting grooves, forming an effective heat dissipation network. When the heat generated by the stator during operation is conducted to the heat dissipation channels through the heat-conducting material, it can be quickly taken away and dissipated to the environment, thereby reducing the temperature rise of the motor and improving the operating efficiency and reliability of the motor.

[0023] The heat-conducting pipe is embedded inside the core and connected with the cooling device, and the heat-conducting pipe is used for enhancing the heat dissipation effect. One end of the heat-conducting pipe is close to the heat source (such as the coil or the high-temperature area of the core), and the other end is connected with the external cooling device (such as the heat sink, liquid cooling system or air cooling system). The heat-conducting pipe has a heat transfer efficiency much higher than that of the traditional heat conduction mode, and can quickly conduct the heat inside the core out to prevent local overheating. The heat-conducting pipe can uniformly distribute the heat to the entire cooling device, avoiding temperature gradient inside the core, thereby improving the stability and reliability of the motor.

[0024] The first clamping part and the second clamping part are provided with pressure sensors for real-time monitoring of the stress of the mover assembly. The pressure sensors are installed on the inner sides of the first clamping part and the second clamping part and directly contact the two ends of the mover assembly; this installation method can directly measure the axial force, radial force and possible impact force that the mover assembly receives during movement. Through the stress data, it can be judged whether the motor is in normal operating state, and when abnormal stress (such as overload or collision) is detected, the protection mechanism is triggered in time to avoid damage to the motor.

[0025] The beneficial effects of the present application are: the structure of the linear motor is optimized, the efficiency, stability and heat dissipation performance of the motor are significantly improved. Specifically, the injection-molded core and coil structure simplifies the manufacturing process and enhances the mechanical strength; by accurately controlling the air gap width (less than 1mm) and using the Halbach magnet array, the electromagnetic conversion efficiency and output thrust are improved; the cooling device (such as a cooling water tank) directly contacts the heat-generating components, combined with heat-conducting fillers and heat dissipation channels, effectively reducing the temperature rise of the motor; the design of the elastic fixing member and the U-shaped support frame ensures the stability of the stator and the mover assembly, reducing vibration and impact; the application of wear-resistant coating and insulation layer further prolongs the service life of the motor and reduces energy consumption. These innovative designs make the motor have significant advantages in high efficiency, small size, low energy consumption and long service life, etc., and are suitable for high-precision and high-reliability application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic view of the whole of the application;

[0027] Figure 2 is a structural schematic view of the mover assembly of the application;

[0028] Figure 3 is a structural schematic view of the stator arrangement of the application;

[0029] Figure 4 is a structural schematic view of the support frame of the application;

[0030] Figure 5 is a structural schematic view of the first side plate or the second side plate of the application.

[0031] The reference signs include:

[0032] 1, first side plate; 2, second side plate; 3, motor base; 4, stator; 5, sliding channel; 6, mover assembly; 7, core; 8, coil; 9, first extension; 11, second extension; 12, support frame; 13, cooling device; 14, S magnet; 15, H1 magnet; 16, N magnet; 17, H2 magnet; 18, first main body; 19, first plate; 21, second plate; 22, first clamping part; 23, second clamping part; 24, elastic buffer; 25, mounting groove; 26, elastic fixing part; 27, heat dissipation channel. DETAILED DESCRIPTION

[0033] For the convenience of understanding of those skilled in the art, the application is further described below in conjunction with the embodiments and the drawings, and the content mentioned in the embodiments is not a limitation on the application.

[0034] Please refer to Figures 1 to 5 The application is a high-efficiency small-volume linear motor, which comprises a first side plate 1, a second side plate 2 parallel to the first side plate 1, and a motor base 3. The inner side walls of the first side plate 1 and the second side plate 2 are both arranged with multiple groups of stators 4. The first side plate 1 and the second side plate 2 jointly form a sliding channel 5, and the motor base 3 reciprocally slides in the sliding channel 5.

[0035] The motor base 3 comprises a mover assembly 6, which comprises multiple groups of cores 7 corresponding to the stators 4. The cores 7 are externally wound with coils 8. The core 7 comprises 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. The motor base 3 further comprises a support frame 12, which is used for fixing the cores 7 and the coils 8 to ensure that the air gaps between the cores 7 and the stators 4 are 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 within the first side plate 1, and the second extension 11 is parallel to the stator 4 within the second side plate 2. This design ensures that the core 7 can effectively interact electromagnetically with both stators 4. By precisely controlling the air gap between the core 7 and the stator 4, 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 12 not only fixes the core 7 and the coil 8, but also ensures the stability of their relative positions, thereby improving the stability of the motor in operation. This is particularly important for applications that require continuous operation for a long time.

[0037] The core 7 and the coil 8 are integrally formed via injection molding. In the traditional manufacturing process, the core 7 and the coil 8 usually need to be manufactured separately and then assembled. The injection molding technology integrates 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 7 and the coil 8 into a whole structure. This enhances the mechanical strength of the motor assembly and improves its ability to resist external impact and vibration.

[0038] The coil 8 adopts a skeleton-free winding coil 8 or a flat coil 8. The skeleton-free winding coil 8 discards the traditional coil 8 skeleton and directly uses a specific process to tightly and neatly wind the wire on the core 7. The skeleton-free winding coil 8 increases the contact area of the coil 8 with air, which is beneficial to heat dissipation and improves the heat dissipation performance of the motor. The flat coil 8 can be highly integrated with other components of the motor, thereby saving a lot of space.

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

[0040] The motor base 3 is also provided with a cooling device 13 installed on the side of the support frame 12 close to the coil 8 or the core 7. By installing the cooling device 13 on the side of the support frame 12 close to the coil 8 or the core 7, it ensures that the cooling device 13 can directly contact the heat generating components. The cooling device 13 is a cooling water tank installed inside the support frame 12, and the side of the cooling water tank away from the support frame 12 is in contact with the coil 8 or the core 7. A cavity is formed at the bottom of the cooling water tank, which is used to nest the coil 8 or the core 7. The cooling water tank is provided with a cooling liquid flow channel that communicates with external cooling devices to realize the circulation of cooling liquid.

[0041] By installing the cooling water tank on the side of the support frame 12 close to the coil 8 or the core 7, it ensures that the cooling device 13 can directly contact the main heat generating components of the motor - the coil 8 or the core 7. This direct contact cooling method greatly reduces the path and resistance of heat transfer, improves the cooling efficiency, and enables the motor to operate at a lower temperature, thereby prolonging the service life of the motor. The design of the cooling water tank not only meets the cooling demand, but also fully considers the space utilization. By nesting the cooling water tank outside the coil 8 or the core 7, it not only achieves effective cooling, but also saves additional cooling space, which is particularly important for high-efficiency small-size linear motors.

[0042] A good thermal conductivity filler is filled between the cooling water tank and the coil 8 or the core 7. The good thermal conductivity filler can effectively fill the small gaps between the cooling water tank and the coil 8 or the core 7, reducing the presence of air and other thermal resistance. Since air is a poor conductor of heat, the introduction of the filler can significantly reduce the resistance of heat transfer and improve the efficiency of heat conduction. This enables the heat generated by the coil 8 or the core 7 to be transferred more quickly to the cooling water tank, and then carried away by the cooling liquid, achieving more effective cooling. The good thermal conductivity filler can also provide some protection against corrosion or damage to the coil 8 or the core 7 due to direct contact with the cooling liquid. At the same time, it can also reduce the relative movement between the coil 8 or the core 7 and the cooling water tank caused by vibration or impact, thereby reducing wear and noise.

[0043] The motor base 3 is coated with a wear-resistant coating on both sides close to the first side plate 1 and the second side plate 2, which is used to reduce the friction loss when the motor base 3 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 and tear between the motor base 3 and the side plates due to long-term friction, thereby enhancing the wear resistance of the motor base 3.

[0044] The stator 4 is arranged in a Halbach magnet array, which is composed of multiple groups of arrays in sequence. 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 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] Due to the special design of the magnetization direction of the magnets, the Halbach magnet array can generate a highly directional magnetic field. This helps to reduce magnetic field leakage and interference, improve the stability and reliability of the motor. The linear motor using the Halbach array can output more power, thereby improving the energy utilization efficiency. This is particularly important for applications that require long-term operation and high-power output, helping to reduce energy consumption and operating costs. Compared with traditional magnet array arrangement, the Halbach array can generate greater thrust under the same conditions.

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

[0047] The support frame 12 is U-shaped, and the mover assembly 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 member 19 integrally formed at both ends of the first main body 18, and a second plate member 21. The other end of the first plate member 19 and the second plate member 21 away from the first main body 18 protrudes towards the side close to the mover assembly 6, and the first clamping portion 22 and the second clamping portion 23 are protruded. The first clamping portion 22 and the second clamping portion 23 jointly clamp the two ends of the mover assembly 6.

[0048] The inner side of the first clamping portion 22 and the inner side of the second clamping portion 23 are both provided with elastic buffer members 24, which are used to reduce the 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, helping to reduce the volume and weight of the motor and improve space utilization. This is particularly important for linear motors that require small size and lightweight applications. The first clamping part 22 and the second clamping part 23 jointly clamp the ends of the mover assembly 6, ensuring the stability of the mover assembly 6 within 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 buffers 24 are arranged on the inner side of the first clamping part 22 and the second clamping part 23, directly contacting the mover assembly 6. These buffers can absorb and disperse the vibrations and shocks generated by the mover assembly 6 during operation, thereby reducing noise, reducing wear and tear, and prolonging the service life of the motor.

[0050] The inner side walls of the first side plate 1 and the second side plate 2 are provided with mounting structures for mounting the stator 4, which include a plurality of mounting slots 25 arranged along the length direction of the side plate. The depth of the mounting slot 25 is one-third of the thickness of the stator 4, and the inner side wall of the mounting slot 25 is provided with an elastic fixing part 26. The elastic fixing part 26 is used to resist the side edge of the stator 4 to prevent the stator 4 from loosening during motor operation. The inner side of the first side plate 1 and the second side plate 2 is provided with a heat dissipation channel 27, which is in communication with the mounting slot 25. The back of the stator 4 is provided with a heat-conducting material for conducting heat from the stator 4 to the heat dissipation channel 27.

[0051] The plurality of mounting slots 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 slots 25 are arranged along the length direction of the side plate, ensuring uniform distribution and stable installation of the stator 4 in the linear motor. The elastic fixing part 26 arranged on the inner side wall of the mounting slot 25 can tightly resist the side edge of the stator 4, effectively preventing the stator 4 from loosening during motor operation. This elastic fixing method not only improves the stability of the stator 4, but also helps to reduce 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 in communication with the mounting slot 25, forming 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-conducting material, it can be quickly taken away and dissipated to the environment, thereby reducing the temperature rise of the motor and improving the operating efficiency and reliability of the motor.

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

[0053] The first clamping part 22 and the second clamping part 23 are provided with pressure sensors for real-time monitoring of the stress 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 received by the mover assembly 6 during movement. Through the stress data, it can be judged whether the motor is in normal operating state, and when abnormal stress (such as overload or collision) is detected, the protection mechanism is triggered in time to avoid damage to the motor.

[0054] The above is only the preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A high-efficiency, small-volume linear motor, characterized in that: It includes a first side plate (1), a second side plate (2) parallel to the first side plate (1), and a motor base (3). Multiple sets 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 base (3) slides back and forth in the sliding channel (5). The motor mount (3) includes a mover assembly (6), which includes multiple sets of iron cores (7) corresponding to the stator (4). A coil (8) is wound around the outside of the iron core (7). The iron 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). The motor mount (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. The support frame (12) is U-shaped, and the moving part assembly (6) is housed in the U-shaped groove of the support frame (12). The support frame (12) includes a first main body (18), a first plate (19) integrally formed with both ends of the first main body (18), and a second plate (21). The other ends of the first plate (19) and the second plate (21) away from the first main body (18) protrude a first snap-fit ​​part (22) and a second snap-fit ​​part (23) towards the side close to the moving part assembly (6). The first snap-fit ​​part (22) and the second snap-fit ​​part (23) together snap-fit ​​the two ends of the moving part assembly (6). Both the inner side of the first snap-fit ​​part (22) and the inner side of the second snap-fit ​​part (23) are provided with elastic buffers (24), which are used to reduce the vibration and impact between the moving part assembly (6) and the support frame (12).

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

4. A high-efficiency, 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 the side of the support frame (12) near the coil (8) or the iron core (7).

5. A high-efficiency, small-volume linear motor according to claim 1, characterized in that: The motor mount (3) is coated with a wear-resistant coating on both sides near the first side plate (1) and the second side plate (2). The wear-resistant coating is used to reduce frictional loss when the motor mount (3) moves.

6. A high-efficiency, small-volume linear motor according to claim 1, characterized in that: The stator (4) is arranged in a Heilbeck magnet array, which consists of multiple arrays. Each array includes four permanent magnets arranged along the length of the first side plate (1) or the second side plate (2). The four 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 Y-axis, the magnetization direction of the N magnet (16) is along the negative Y-axis, the magnetization direction of the H1 magnet (15) is along the positive X-axis, and the magnetization direction of the H2 magnet (17) is along the negative X-axis.

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

8. A high-efficiency, small-volume linear motor according to claim 1, characterized in that: The inner sidewall of the first side plate (1) and the inner sidewall of the second side plate (2) are provided with mounting structures for mounting the stator (4). The mounting structure includes multiple mounting slots (25). The mounting slots (25) are arranged along the length of the side plate. The depth of the mounting slots (25) is one-third of the thickness of the stator (4). Elastic fasteners (26) are provided around the sidewall of the mounting slots (25). The elastic fasteners (26) are used to abut against the side of the stator (4) to prevent the stator (4) from loosening when the motor is running. Heat dissipation channels (27) are provided on the inner side of the first side plate (1) and the second side plate (2). The heat dissipation channels (27) are connected to the mounting slots (25). The back of the stator (4) is provided with heat-conducting material to conduct the heat of the stator (4) unit to the heat dissipation channels (27).

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