Short-magnetic-circuit low-magnetic-resistance high-efficiency linear motor module

Abstract

The invention relates to the technical field of linear motors, and particularly discloses a short-magnetic-circuit low-magnetic-resistance efficient linear motor module which comprises a stator and a rotor moving relative to the stator, the stator comprises two groups of magnetic units, the rotor is located between the two groups of magnetic units, the magnetic units are arranged on an external guide rail, and the rotor is movably connected with the guide rail; each magnetic unit comprises a plurality of groups of magnet sheets which are arranged at equal intervals along the length direction of the stator, the rotor comprises a coil unit and a control system, the control system is electrically connected with the coil unit, the control system is used for providing current for the coil unit, and the electrified coil unit and the two groups of magnetic units attract each other through magnetic force. The coil unit comprises a support and a coil winding arranged on the support, the coil winding is inserted between the two magnetic units, and the support is in sliding fit with an external guide rail. According to the invention, the magnetic resistance is further reduced and the response speed of the motor is improved through the design that the coil windings are arranged on the straight surfaces of the magnet sheets, the magnetic circuit length is obviously shortened, and the magnetic resistance and magnetic leakage are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of linear motors, and in particular discloses a short magnetic circuit, low magnetic resistance and high efficiency linear motor module. Background Art

[0002] With the rapid development of modern industrial automation and precision equipment, the demand for high-efficiency, low-magnetic resistance, low-noise and reliable linear motors is increasing. Traditional linear motors usually use electromagnets and yoke structures. Although this type of structure is widely used, it has problems such as large magnetic resistance, low efficiency, large size, and high heat and noise generation, which limits its use in some high-precision and high-efficiency applications.

[0003] Existing linear motors mostly use traditional magnetic materials, such as iron cores and permanent magnets. However, these traditional motors are usually inefficient due to uneven magnetic field distribution or large magnetic losses during operation, and the heat dissipation is insufficient at high speeds, affecting their stability and service life. At the same time, because traditional motors are prone to high noise and vibration during use, they cannot meet actual needs in some fields with strict requirements on noise and vibration (such as high-precision positioning equipment, medical equipment, robots, etc.). 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 linear motor with short magnetic circuit, low magnetic resistance and high efficiency.

[0005] To achieve the above-mentioned purpose, a short magnetic circuit, low magnetic resistance, and high-efficiency linear motor module of the present invention comprises a stator and a mover that moves relative to the stator, wherein the stator comprises two groups of magnetic units, the mover is located between the two groups of magnetic units, the magnetic unit is arranged on an external guide rail, and the mover is movably connected to the guide rail; the magnetic unit comprises a plurality of groups of magnet pieces arranged at equal intervals along the length direction of the stator, the mover comprises a coil unit and a control system, the control system is electrically connected to the coil unit, the control system is used to provide current to the coil unit, and the coil unit after power-on attracts the two groups of magnetic units via magnetic force, the coil unit comprises a bracket and a coil winding arranged on the bracket, the coil winding is inserted between the two groups of magnetic units, and the bracket and the external guide rail are slidably matched. The present invention significantly shortens the length of the magnetic circuit by having the magnet piece directly facing the coil winding, reduces magnetic resistance and magnetic leakage, and the design without a magnetic yoke further reduces magnetic resistance, improves the response speed of the motor, and the coil and the magnet piece act at a close distance, improves the utilization rate of the magnetic field, and enhances the thrust density.

[0006] Furthermore, the magnet sheet includes a first magnet, a second magnet, a third magnet and a fourth magnet arranged in sequence, the magnetic poles of the first magnet and the third magnet on the side close to the second body are opposite, the magnetic poles of the second magnet and the fourth magnet on the side close to the third magnet are the same, and the internal magnetic flux lines of the first magnet and the third magnet intersect with the internal magnetic flux lines of the second magnet and the fourth magnet, with an angle of 45-90°. By optimizing the arrangement of the magnet pieces, the magnetic field is strengthened within the effective working area of ​​the motor. This arrangement allows the magnetic lines of force to be concentrated along the direction of movement of the motor, thereby increasing the magnetic field strength and power density of the motor. Compared with the traditional magnet arrangement, the Halbach array can more effectively utilize the magnetic field of the magnet and improve the torque and efficiency of the motor. At the same time, the traditional magnet arrangement usually causes part of the magnetic field to leak along the edge of the motor, thereby wasting energy, while the design of the Halbach array greatly reduces the leakage of the magnetic field. By precisely controlling the distribution of the magnetic field, the Halbach array can ensure that most of the magnetic lines of force are concentrated within the working area of ​​the motor, thereby improving the overall efficiency of the motor. The use of Halbach array magnets can increase the concentration of the magnetic field, thereby providing a stronger magnetic field strength in the same space, which allows the motor to reduce size and weight while maintaining high efficiency, meeting the needs of lightweight and compact design in modern industry.

[0007] Furthermore, the magnet sheet is a magnet unit or a magnetic conductive unit. The magnet unit includes a permanent magnet and a shielding cover wrapped around the outside of the permanent magnet. The shielding cover is an integrated structure. The shielding cover has a blind groove for accommodating the permanent magnet. The opening of the blind groove exposes the end face of the permanent magnet. The magnetic conductive unit is made of magnetic conductive material. The setting of the shielding cover enables the magnet unit to form a unilateral magnetic field, enhances the magnetic density between the two groups of magnetic units, enhances the force between the magnetic units, and avoids the influence of the magnetic unit on external electronic components. The shielding cover with an integrated structure has a better shielding effect. The integrated shielding cover has no seams or joints, can effectively block the leakage and interference of electromagnetic waves, and provide higher shielding efficiency. At the same time, the integrated shielding cover can better resist the influence of the external environment (such as moisture, corrosion, etc.), and is particularly suitable for applications in harsh environments.

[0008] Furthermore, the permanent magnet is a neodymium iron boron magnet, and the shielding cover is made of a magnetic conductive material. The shielding cover is formed by metal injection molding, 3D printing, CNC processing, laser cutting or stamping. Neodymium iron boron magnets have high magnetic energy product and coercive force, and can maintain their magnetism without demagnetization in a strong magnetic field. They are suitable for applications that require high stability. They can maintain their magnetic properties at a higher temperature (up to 200°C) to avoid demagnetization of the magnet due to motor heating. The use of magnetic conductive materials for the shielding cover can further enhance the guiding effect of the magnetic field and reduce energy loss. Using different processing methods can improve manufacturing accuracy and production efficiency and reduce manufacturing costs.

[0009] Furthermore, the bracket is provided with a wire hole, and the coil winding is wound on the bracket by passing through the wire hole. A heat sink is provided on the side of the bracket away from the coil winding, and a groove is provided on the heat sink. The groove and the bracket form an air outlet gap opening toward the stator. A heat dissipation duct is provided inside the heat sink, and the air outlet of the heat dissipation duct is arranged on the groove and communicated with the air outlet gap. The heat dissipation design can effectively reduce the working temperature of the coil, avoid performance degradation or damage caused by overheating, and improve the long-term stability of the motor. The air outlet gap is directly aligned with the high temperature area of ​​the coil, improves the heat dissipation efficiency, and keeps the motor running at a higher working efficiency. The heat sink is integrated into the bracket without adding extra volume. The heat sink is integrated into the bracket without adding extra volume.

[0010] Furthermore, the bracket is made of epoxy resin, and the coil winding and the bracket are cast by epoxy resin. Epoxy resin casting can ensure the close connection between the coil winding and the bracket, improve the stability and conductivity of the motor, and the high insulation of epoxy resin can effectively avoid electrical short circuit and overheating, and enhance the safety of the motor. At the same time, after curing, epoxy resin can form a strong three-dimensional cross-linked network structure, which has high compressive strength, tensile strength and bending strength, so that the molded components can withstand greater mechanical pressure and external force impact during use, and are not easy to deform or damage. The epoxy resin casting process is simple and efficient, and can be mass-produced through precision molds. Therefore, compared with other traditional manufacturing processes, such as casting or metal welding, epoxy resin casting usually has lower production costs and shorter production cycles.

[0011] Furthermore, the heat sink is made of stainless steel, aluminum alloy or aluminum nitride. Considering that the thermal interface between the epoxy resin support and the heat sink has a high thermal resistance, which will affect the heat transfer, after adopting the above technical solution, the heat sink can be used as a conductive medium to significantly improve the efficiency of heat transfer from the mover to the outside world, reduce local hot spots, and increase the heat dissipation capacity of the epoxy resin cast coil winding.

[0012] Furthermore, the coil winding includes multiple groups of cutting segments and U-shaped connecting segments, the multiple groups of cutting segments are arranged at equal intervals along the length direction of the bracket, and the U-shaped connecting segment connects two adjacent groups of cutting segments to form a wave structure. This coil design increases the effective area of ​​the winding, improves the power density and efficiency of the motor, and the wave structure can reduce magnetic loss and improve the response speed and accuracy of the motor.

[0013] Furthermore, the coil windings are provided with three groups, and the three groups of coil windings are arranged alternately at an electrical angle of 120 degrees between each other. The three-phase winding adopts a staggered arrangement, which can give the coil windings more space for heat dissipation and prevent heat accumulation. At the same time, this arrangement can achieve balanced operation of the three-phase motor, reduce vibration and noise in the motor, and through phase staggering, the motor can achieve smoother startup and operation, improving overall performance.

[0014] Furthermore, the thickness of the magnet sheet is 4-16 mm. The thickness of the magnet sheet is controlled within this range, which can provide sufficient magnetic output while maintaining appropriate magnetic flux density and preventing excessive magnetic resistance. This thickness range helps to optimize the volume-to-power ratio of the motor, providing sufficient power while avoiding unnecessary volume expansion.

[0015] Beneficial effects of the present invention: The present invention significantly shortens the length of the magnetic path by having the magnet sheet directly facing the coil winding, reduces magnetic resistance and magnetic leakage, and the design without a magnetic yoke further reduces magnetic resistance and improves the motor response speed. The coil and the magnet sheet act in close proximity, thereby improving the utilization rate of the magnetic field and enhancing the thrust density.

[0016] By optimizing the arrangement of the magnet pieces, the magnetic field is strengthened in the effective working area of ​​the motor. This arrangement allows the magnetic lines of force to be concentrated along the direction of movement of the motor, thereby increasing the magnetic field strength and power density of the motor. Compared with the traditional magnet arrangement, the Halbach array can more effectively utilize the magnetic field of the magnet and improve the torque and efficiency of the motor. At the same time, the traditional magnet arrangement usually causes part of the magnetic field to leak along the edge of the motor, thereby wasting energy, while the design of the Halbach array greatly reduces the leakage of the magnetic field. By precisely controlling the distribution of the magnetic field, the Halbach array can ensure that most of the magnetic lines of force are concentrated in the working area of ​​the motor, thereby improving the overall efficiency of the motor. The use of Halbach array magnets can increase the concentration of the magnetic field, so it can provide a stronger magnetic field strength in the same space, which allows the motor to reduce its size and weight while maintaining high efficiency, meeting the needs of lightweight and compact design in modern industry.

[0017] The heat dissipation design can effectively reduce the operating temperature of the coil, avoid performance degradation or damage caused by overheating, and improve the long-term stability of the motor. The air outlet gap is directly aligned with the high-temperature area of ​​the coil to improve the heat dissipation efficiency and keep the motor running at a higher working efficiency. The heat sink is integrated into the bracket without adding extra volume. The heat sink is integrated into the bracket without adding extra volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a short magnetic circuit, low magnetic resistance and high efficiency linear motor module of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the mover of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the mover of the present invention from another perspective;

[0021] Figure 4 It is a structural schematic diagram of the magnet sheet of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the heat dissipation plate of the present invention;

[0023] Figure 6 for Figure 3 Schematic diagram of the cross section of section AA;

[0024] Figure 7 for Figure 6 A partial schematic diagram of the middle part;

[0025] Figure 8 for Figure 3 Schematic cross-sectional view of the middle BB section;

[0026] Fig. 9 It is a structural schematic diagram of the third embodiment of a short magnetic circuit, low magnetic resistance and high efficiency linear motor module of the present invention.

[0027] Reference numerals include:

[0028] 1. Stator; 2. Mover; 3. Magnetic unit; 4. Magnet sheet; 5. Coil unit; 6. Bracket; 7. Coil winding; 8. First magnet; 9. Second magnet; 10. Third magnet; 11. Fourth magnet; 12. Yoke; 13. Fixing piece; 14. Heat sink; 15. Groove; 16. Air outlet gap; 17. Heat dissipation duct; 18. Cutting section; 19. U-shaped connecting section; 20. Air inlet; 21. Air outlet. DETAILED DESCRIPTION

[0029] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0030] See also Figures 1 to 9As shown, a short magnetic circuit low magnetic resistance high-efficiency linear motor module of the present invention comprises a stator 1 and a mover 2 moving relative to the stator 1, the stator 1 comprises two groups of magnetic units 3, the mover 2 is located between the two groups of magnetic units 3, the magnetic unit 3 is arranged on an external guide rail, and the mover 2 is movably connected to the guide rail; the magnetic unit 3 comprises a plurality of groups of magnet pieces 4 arranged at equal intervals along the length direction of the stator 1, the mover 2 comprises a coil unit 5 and a control system, the control system is electrically connected to the coil unit 5, the control system is used to provide current to the coil unit 5, the coil unit 5 after energization and the two groups of magnetic units 3 attract each other through magnetic force to drive the mover 2 to move, the coil unit 5 comprises a bracket 6 and a coil winding 7 arranged on the bracket 6, the coil winding 7 is inserted between the two groups of magnetic units 3, and the bracket 6 is slidably matched with the external guide rail. In the present invention, the magnetic circuit length is significantly shortened by the magnet piece 4 directly facing the coil winding 7, the magnetic resistance and leakage magnetic flux are reduced, the design without the magnetic yoke 12 further reduces the magnetic resistance, improves the motor response speed, the coil and the magnet piece 4 act at a close distance, improves the magnetic field utilization rate, and enhances the thrust density.

[0031] The magnet sheet 4 includes a first magnet 8, a second magnet 9, a third magnet 10 and a fourth magnet 11 arranged in sequence, the magnetic poles of the first magnet 8 and the third magnet 10 close to the second body are opposite, the magnetic poles of the second magnet 9 and the fourth magnet 11 close to the third magnet 10 are the same, and the internal magnetic flux lines of the first magnet 8 and the third magnet 10 intersect with the internal magnetic flux lines of the second magnet 9 and the fourth magnet 11, with an angle of 45-90°. By optimizing the arrangement of the magnet pieces 4, the magnetic field is strengthened in the effective working area of ​​the motor. This arrangement allows the magnetic lines of force to be concentrated along the direction of movement of the motor, thereby increasing the magnetic field strength and power density of the motor. Compared with the traditional magnet arrangement, the Halbach array can more effectively utilize the magnetic field of the magnet and improve the torque and efficiency of the motor. At the same time, the traditional magnet arrangement usually causes part of the magnetic field to leak along the edge of the motor, thereby wasting energy, while the design of the Halbach array greatly reduces the leakage of the magnetic field. By precisely controlling the distribution of the magnetic field, the Halbach array can ensure that most of the magnetic lines of force are concentrated in the working area of ​​the motor, thereby improving the overall efficiency of the motor. The use of Halbach array magnets can increase the concentration of the magnetic field, and therefore can provide a stronger magnetic field strength in the same space, which allows the motor to reduce size and weight while maintaining high efficiency, meeting the needs of lightweight and compact design in modern industry.

[0032] The magnet sheet 4 is a magnet unit or a magnetic conductive unit. The magnet unit includes a permanent magnet and a shielding cover wrapped around the outside of the permanent magnet. The shielding cover is an integrated structure. The shielding cover has a blind groove for accommodating the permanent magnet. The opening of the blind groove exposes the end face of the permanent magnet. The magnetic conductive unit is made of magnetic conductive material. The setting of the shielding cover enables the magnet unit to form a unilateral magnetic field, enhances the magnetic density between the two groups of magnetic units 3, enhances the force between the magnetic units 3, and avoids the influence of the magnetic units 3 on external electronic components. The shielding cover of the integrated structure has a better shielding effect. The integrated shielding cover has no seams or joints, can effectively block the leakage and interference of electromagnetic waves, and provide higher shielding efficiency. At the same time, the integrated shielding cover can better resist the influence of the external environment (such as moisture, corrosion, etc.), and is particularly suitable for applications in harsh environments.

[0033] The permanent magnet is a neodymium iron boron magnet, and the shield is made of a magnetic conductive material. The shield is formed by metal injection molding, 3D printing, CNC processing, laser cutting or stamping. Neodymium iron boron magnets have high magnetic energy product and coercive force, and can maintain their magnetism without demagnetization in a strong magnetic field. They are suitable for applications that require high stability. They can maintain their magnetic properties at a higher temperature (up to 200°C) to avoid demagnetization of the magnet due to motor heating. The use of magnetic conductive materials in the shield can further enhance the guiding effect of the magnetic field and reduce energy loss. Using different processing methods can improve manufacturing accuracy and production efficiency and reduce manufacturing costs.

[0034] The bracket 6 is provided with a wire hole, and the coil winding 7 is wound on the bracket 6 by passing through the wire hole. A heat sink 14 is provided on the side of the bracket 6 away from the coil winding 7. A groove portion 15 is provided on the heat sink 14. The groove portion 15 and the bracket 6 form an air outlet gap 16 with an opening toward the stator 1. A heat dissipation duct 17 is provided inside the heat sink 14. The air outlet 21 of the heat dissipation duct 17 is arranged on the groove portion 15 and communicates with the air outlet gap 16. The heat dissipation design can effectively reduce the working temperature of the coil, avoid performance degradation or damage caused by overheating, and improve the long-term stability of the motor. The air outlet gap 16 is directly aligned with the high temperature area of ​​the coil, improves the heat dissipation efficiency, and keeps the motor running at a higher working efficiency. The heat sink 14 is integrated into the bracket 6 without adding extra volume. The heat sink 14 is integrated into the bracket 6 without adding extra volume.

[0035] Specifically, the air outlet 21 of the heat dissipation air duct 17 is configured as a circular hole. A plurality of the air outlets 21 are provided, and the plurality of air outlets 21 are linearly arranged along the length direction of the heat dissipation plate 14 .

[0036] Specifically, in order to facilitate connection with air supply equipment (such as an air pump, etc.), the air inlet 20 of the heat dissipation duct 17 can be provided with an air inlet connector, and the air inlet connector of the heat dissipation plate 14 can be connected to the air supply equipment through an air pipe.

[0037] During operation, the gas can enter the heat sink 14 from the air inlet joint, pass through the heat dissipation duct 17 inside the heat sink 14, and come out from the air outlet 21 of the heat dissipation duct 17. The air knife airflow generated by the air outlet gap 16 formed between the groove portion 15 of the heat sink 14 and the bracket 6 directly acts on the surface of the bracket 6, directly taking away the heat generated by the coil winding 7, and then the cooling gas flows out from the gap between the magnetic unit 3 and the mover 2, while also further reducing the temperature of the magnetic unit 3, achieving the purpose of cooling both the mover 2 and the stator 1. Compared with natural cooling, the air cooling method of this embodiment can significantly reduce the temperature of the mover 2 and the stator 1 of the linear motor.

[0038] The bracket 6 is made of epoxy resin, and the coil winding 7 and the bracket 6 are cast by epoxy resin. Epoxy resin casting can ensure the close connection between the coil winding 7 and the bracket 6, improve the stability and conductivity of the motor, and the high insulation of epoxy resin can effectively avoid electrical short circuit and overheating, and enhance the safety of the motor. At the same time, after curing, the epoxy resin can form a strong three-dimensional cross-linked network structure, which has high compressive strength, tensile strength and bending strength, so that the molded components can withstand greater mechanical pressure and external force impact during use, and are not easy to deform or damage. The epoxy resin casting process is simple and efficient, and can be mass-produced through precision molds. Therefore, compared with other traditional manufacturing processes, such as casting or metal welding, epoxy resin casting usually has lower production costs and shorter production cycles.

[0039] The heat sink 14 is made of stainless steel, aluminum alloy or aluminum nitride. Considering that the thermal interface between the epoxy resin support and the heat sink 14 has a high thermal resistance, which will affect the heat transfer, after adopting the above technical solution, the heat sink 14 can be used as a conductive medium to significantly improve the efficiency of heat transfer from the mover 2 to the outside, reduce local hot spots, and increase the heat dissipation capacity of the epoxy resin-cast coil winding 7.

[0040] The coil winding 7 includes multiple groups of cutting segments 18 and U-shaped connecting segments 19. The multiple groups of cutting segments 18 are arranged at equal intervals along the length direction of the bracket 6. The U-shaped connecting segment 19 connects two adjacent groups of cutting segments 18 to form a wave structure. This coil design increases the effective area of ​​the winding, improves the power density and efficiency of the motor, and the wave structure can reduce magnetic loss and improve the response speed and accuracy of the motor.

[0041] The coil windings 7 are provided with three groups, and the three groups of coil windings 7 are arranged alternately at an electrical angle of 120° between each other. The three-phase winding adopts an interlaced arrangement, which can give the coil windings 7 a larger space for heat dissipation and prevent heat accumulation. At the same time, this arrangement can achieve balanced operation of the three-phase motor, reduce vibration and noise in the motor, and through phase interlacing, the motor can achieve smoother startup and operation, improving overall performance.

[0042] The thickness of the magnet sheet 4 is 4-16 mm. The thickness of the magnet sheet 4 is controlled within this range, which can provide sufficient magnetic output while maintaining appropriate magnetic flux density and preventing excessive magnetic resistance. This thickness range helps to optimize the volume-to-power ratio of the motor, providing sufficient power while avoiding unnecessary volume expansion.

[0043] Specifically, the spacing between the magnetic unit 3 and the coil winding 7 is 0.8-1.0 mm. The spacing between the magnetic unit 3 and the coil winding 7 directly affects the coupling efficiency of the magnetic field. A smaller spacing (such as 0.8-1.0 mm) can make the magnetic field act more closely on the coil winding 7, thereby enhancing the interaction between the magnetic flux and the current and improving the output torque and thrust of the motor. Too large a spacing may lead to uneven magnetic field distribution or waste of magnetic flux, reducing the efficiency of the motor. Within this specific spacing range, the magnetic field coupling between the magnetic unit 3 and the coil winding 7 is maximized, and the energy conversion efficiency is higher. A smaller spacing can reduce the leakage of magnetic flux, so that more magnetic energy is effectively converted into mechanical energy, thereby improving the overall efficiency of the motor. Especially in high-efficiency applications, this design can significantly reduce energy loss. By precisely controlling the spacing between the magnetic unit 3 and the coil winding 7, the design of the motor can be more compact. Maintaining an appropriate spacing (0.8-1.0 mm) between the magnetic unit 3 and the coil can effectively reduce the overall size and weight of the motor. This can provide greater advantages for applications that require lightweight design, especially in the fields of robots, aerospace, and mobile devices.

[0044] In the second embodiment, the mover 2 also includes a heat dissipation component, which includes a heat dissipation pipe, a water pump and a liquid storage tank. The heat dissipation pipe, the water pump and the liquid storage tank form a circulation loop. The heat dissipation pipe passes through the heat dissipation duct 17, and the outer wall of the heat dissipation pipe contacts the inner wall of the heat dissipation duct 17. The water pump is used to drive the coolant in the liquid storage tank to exchange heat with the heat dissipation plate 14 through the heat dissipation pipe. The liquid has a high specific heat capacity and can carry more heat in a smaller volume. The liquid cooling system can absorb and transfer heat faster, which is particularly suitable for high-power and high-load equipment, and generates less noise during operation. Because liquid cooling does not rely on high-speed fans, it is suitable for application scenarios with requirements on noise. The circulation of the coolant is achieved by the water pump, which can maintain a stable heat dissipation effect when the motor is working to avoid local overheating. The self-circulation of the coolant is completed through the liquid storage tank without the need for external equipment, thereby reducing production costs.

[0045] Specifically, the liquid storage tank is fixedly connected with heat dissipation fins, and the heat dissipation fins quickly conduct the heat absorbed in the liquid storage tank to the surrounding environment, ensuring that the coolant in the liquid storage tank is maintained at a relatively low temperature.

[0046] Specifically, a refrigeration component is provided in the liquid storage tank, and the refrigeration component is a semiconductor refrigeration sheet, and the refrigeration component is used to reduce the temperature of the coolant in the liquid storage tank.

[0047] Specifically, the heat dissipation pipe is a metal hose with good thermal conductivity. The metal hose has good flexibility and high temperature resistance, can adapt to the deformation and vibration of the motor when it is working, and at the same time ensure that the coolant can flow smoothly, and can ensure long-term use without damage, thereby improving the heat dissipation effect and system stability.

[0048] In the third embodiment, the stator 1 further comprises two groups of yokes 12 and fixing members 13, the two groups of yokes 12 are fixedly connected via the fixing members 13, the two groups of yokes 12 are arranged in parallel and with a gap, the two groups of magnetic units 3 are respectively mounted on the two groups of yokes 12, the yokes 12 are provided with a plurality of mounting holes arranged along the length direction of the yokes 12, and the external fasteners pass through the mounting holes to fix the yokes 12. By setting the yokes 12, the magnetic field strength generated by the stator 1 can be effectively enhanced. The yokes 12 can make the magnetic field more concentrated and act more forcefully on the mover 2, thereby improving the efficiency and output power of the motor and reducing magnetic loss. This structure enables the motor to generate greater driving force at a lower input power and improve the overall efficiency of the system; the yokes 12 can effectively guide the magnetic field so that the magnetic lines of force are distributed along the relative motion direction between the stator 1 and the mover 2, thereby improving the directionality of the magnetic field. Good magnetic field orientation helps to improve the stability and working accuracy of the motor, especially in applications requiring high-precision motion control; the design of the yokes 12 can not only improve the concentration of the magnetic field, but also optimize the thermal management of the motor. Because the magnetic yoke 12 can guide and concentrate the magnetic field and reduce the non-uniformity of the magnetic field, thereby reducing heat accumulation in the motor and improving the thermal efficiency and service life of the motor.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A short magnetic circuit, low magnetic resistance and high efficiency linear motor module, comprising a stator (1) and a mover (2) moving relative to the stator (1), the stator (1) comprising two groups of magnetic units (3), the mover (2) being located between the two groups of magnetic units (3), the magnetic units (3) being arranged on an external guide rail, and the mover (2) being movably connected to the guide rail; characterized in that: The magnetic unit (3) comprises a plurality of groups of magnet pieces (4) arranged at equal intervals along the length direction of the stator (1); the mover (2) comprises a coil unit (5) and a control system; the control system is electrically connected to the coil unit (5); the control system is used to provide current to the coil unit (5); after power is supplied, the coil unit (5) and the two groups of magnetic units (3) attract each other via magnetic force to drive the mover (2) to move; the coil unit (5) comprises a bracket (6) and a coil winding (7) arranged on the bracket (6); the coil winding (7) is inserted between the two groups of magnetic units (3); and the bracket (6) is slidably matched with an external guide rail.

2. According to claim 1, a short magnetic circuit, low magnetic resistance and high efficiency linear motor module is characterized in that: The magnet sheet (4) comprises a first magnet (8), a second magnet (9), a third magnet (10) and a fourth magnet (11) arranged in sequence, wherein the magnetic poles of the first magnet (8) and the third magnet (10) on a side close to the second body are opposite, and the magnetic poles of the second magnet (9) and the fourth magnet (11) on a side close to the third magnet (10) are the same, and the internal magnetic flux lines of the first magnet (8) and the third magnet (10) intersect with the internal magnetic flux lines of the second magnet (9) and the fourth magnet (11), with an angle of 45-90°.

3. According to claim 1, a short magnetic circuit, low magnetic resistance and high efficiency linear motor module is characterized in that: The magnet sheet (4) is a magnet unit or a magnetic conductive unit, the magnet unit comprises a permanent magnet and a shielding cover covering the outside of the permanent magnet, the shielding cover is an integrated structure, the shielding cover has a blind groove portion for accommodating the permanent magnet, and the opening of the blind groove portion exposes the end face of the permanent magnet; The magnetic conductive unit is made of magnetic conductive material.

4. The short magnetic circuit, low magnetic resistance and high efficiency linear motor module according to claim 3, characterized in that: The permanent magnet is a neodymium iron boron magnet, the shielding cover is made of a magnetic conductive material, and the shielding cover is formed by metal injection molding, 3D printing, CNC machining, laser cutting or stamping.

5. The short magnetic circuit, low magnetic resistance and high efficiency linear motor module according to claim 1, characterized in that: The bracket (6) is provided with a wire hole, and the coil winding (7) is wound on the bracket (6) by passing through the wire hole. A heat sink (14) is provided on a side of the bracket (6) away from the coil winding (7), and a groove portion (15) is provided on the heat sink (14). The groove portion (15) and the bracket (6) form an air outlet gap (16) opening toward the stator (1). A heat dissipation duct (17) is provided inside the heat sink (14), and an air outlet (21) of the heat dissipation duct (17) is arranged on the groove portion (15) and communicates with the air outlet gap (16).

6. The short magnetic circuit, low magnetic resistance and high efficiency linear motor module according to claim 1, characterized in that: The support (6) is made of epoxy resin, and the coil winding (7) and the support (6) are cast by epoxy resin.

7. The short magnetic circuit, low magnetic resistance and high efficiency linear motor module according to claim 5, characterized in that: The heat dissipation plate (14) is made of stainless steel, aluminum alloy or aluminum nitride.

8. The short magnetic circuit, low magnetic resistance and high efficiency linear motor module according to claim 1, characterized in that: The coil winding (7) comprises a plurality of groups of cutting segments (18) and U-shaped connecting segments (19); the plurality of groups of cutting segments (18) are arranged at equal intervals along the length direction of the bracket (6); and the U-shaped connecting segment (19) connects two adjacent groups of cutting segments (18) to form a wave-shaped structure.

9. The short magnetic circuit, low magnetic resistance and high efficiency linear motor module according to claim 8, characterized in that: The coil windings (7) are provided with three groups, and the three groups of coil windings (7) are arranged alternately at an electrical angle interval of 120° between each other.

10. The short magnetic circuit, low magnetic resistance and high efficiency linear motor module according to claim 1, characterized in that: The thickness of the magnet sheet (4) is 4-16 mm.

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