CN116388465A - Cooling system for linear motor and linear motor - Google Patents

Abstract

The invention discloses a cooling system for a linear motor and the linear motor, which relate to the technical field of motor heat dissipation and comprise the following components: the rotor comprises a motor silicon steel sheet, wherein the bottom of the motor silicon steel sheet is connected with an iron core, and a coil winding is wound on the iron core; the top of motor silicon steel sheet is equipped with the liquid cooling board, the motor silicon steel sheet with be equipped with the heat conduction interface material between the contact surface of liquid cooling board, the inside of liquid cooling board is provided with heat radiation fins, just heat radiation fins is formed with the runner that supplies the cooling medium to flow, the inside of liquid cooling board is provided with inlet and liquid outlet, the inlet with the liquid outlet link up with the runner that heat radiation fins formed respectively. The invention can improve the heat dissipation condition of the internal winding of the flat linear motor and reduce the temperature of the motor winding.

Description

A cooling system for a linear motor and the linear motor

technical field

The invention relates to the technical field of motor heat dissipation, in particular to a cooling system for a linear motor and the linear motor.

Background technique

Permanent magnet linear motors have significant advantages such as high thrust density, high acceleration, high speed, high precision, and high efficiency, and are widely used in high-precision numerical control equipment, lithography machines and other applications.

In order to increase the thrust density and achieve high-acceleration operation, it is usually necessary to apply a large current density, which will generate large losses. These losses will cause the temperature of the motor to rise rapidly as a heat source, which may exceed the temperature rise limit of the motor winding insulation. Or the temperature rise limit of the permanent magnet material. If no measures are taken to protect and prevent it, the high temperature is likely to cause the insulation material of the motor to age, the structure to deform, and the permanent magnet material to demagnetize or lose magnetism, resulting in the hottest spot in the motor winding and back iron. Build up and spread, leaving the motor completely damaged and inoperable. Therefore, it is very necessary to install a cooling system in the motor, which can suppress the temperature rise of the motor, improve the overload capacity and continuous output thrust of the motor under different working conditions, and ensure its safe operation.

Contents of the invention

To solve the problem of insufficient heat dissipation of linear motors in the prior art, the present invention provides a cooling system for linear motors and a linear motor, which can improve the heat dissipation efficiency and operating efficiency of the linear motor.

To achieve the above object, the present invention adopts the following technical solutions:

A cooling system for a linear motor comprising:

The mover comprises a motor silicon steel sheet, an iron core is connected to the bottom of the motor silicon steel sheet, and a coil winding is wound on the iron core; a liquid cooling plate is arranged on the top of the motor silicon steel sheet, and the motor silicon steel sheet and the A heat conduction interface material is provided between the contact surfaces of the liquid cold plate, and heat dissipation fins are arranged inside the liquid cold plate, and the heat dissipation fins form flow channels for the cooling medium to flow, and the liquid cold plate A liquid inlet and a liquid outlet are arranged in the inside of the body, and the liquid inlet and the liquid outlet respectively communicate with the flow channels formed by the heat dissipation fins.

According to the above-mentioned cooling system for linear motors, further, the liquid cooling plate is in surface contact with the silicon steel sheet of the motor.

In the above-mentioned cooling system for linear motors, further, the top of the liquid cooling plate is provided with a cover plate, the bottom end of the liquid cooling plate is provided with a bottom plate, and the cover plate and the bottom plate are provided The heat dissipation fins.

As mentioned above in the cooling system for the linear motor, further, the liquid inlet and the liquid outlet are respectively arranged on the side of the cover plate.

As for the above-mentioned cooling system for linear motors, further, the cross-sectional area of the heat dissipation fins is one of a zigzag shape, a triangle shape, a wave shape, a porous shape or a zigzag shape.

In the above-mentioned cooling system for linear motors, further, the flow channel for the cooling medium to flow is formed with a plurality of unit flow channels arranged in parallel, the unit flow channel on the side of the liquid inlet and the unit flow channel on the side of the liquid outlet The numbers are the same, and the liquid inlet side and the liquid outlet side of the unit flow channel are respectively connected with the liquid inlet and the liquid inlet.

According to the above cooling system for linear motors, further, the unit flow channels are arranged on the same horizontal plane, and the unit flow channels are arranged as linear flow channels.

As mentioned above in the cooling system for the linear motor, further, the flow channel for the cooling medium to flow is a U-shaped return flow channel.

In the above-mentioned cooling system for linear motors, further, the heat-conducting interface material is heat-conducting silicone grease; the cooling medium is water; and the liquid cooling plate is made of aluminum alloy.

A linear motor with the above-mentioned cooling system, which also includes a stator cooperating with the mover, the mover is slidably arranged in the stator, the stator includes magnetic steel and guide rails, the The magnetic steel is laid along the length direction of the guide rail.

Compared with the prior art, the present invention has the beneficial effect that: the present invention designs a detachable liquid cooling plate that matches the linear motor in combination with the research on the geometric parameters, electromagnetic performance and operating conditions of the motor, Among them, the liquid cooling plate is installed on the silicon steel sheet of the motor, and the bottom side of the liquid cooling plate is provided with a thermal interface material, which is used to reduce the thermal resistance during the surface contact process of the device and enhance the effective transfer of heat. The liquid cooling plate indirectly transfers the huge heat from the coil winding to the cooling medium enclosed in the circulation pipeline, and the heat is taken away through the cooling medium. The cooling medium enters the liquid cold plate from the liquid inlet, flows through the cooling fins installed on the cold plate, and then flows out from the liquid outlet to take away heat. The cooling medium flowing out of the cold liquid plate is cooled by the external cooling system and then sent to the cold liquid plate for circulation and cooling.

On the one hand, the density of heat exchange can be greatly increased due to the structure of multiple sets of extended surfaces (radiation fins) inside the liquid cooling plate, the smaller equivalent diameter of the cooling channel, and the use of rib surface geometry that is conducive to enhancing convective heat transfer. . On the other hand, the convective heat transfer coefficient of the cooling medium used, such as water and oil, is much larger than that of ordinary air. Therefore, the liquid cold plate can very efficiently take away the ohmic heat generated by the winding assembly during operation from the winding assembly.

Among them, considering the complex working mode of the motor, when the motor is in low-performance mode such as low load and low speed, the liquid cooling plate can be disassembled to improve energy efficiency; while the motor is under high load, high precision, high acceleration, etc. In the high-performance mode, the liquid energy plate can well solve the problem of thermal runaway and ensure the reliable operation of the motor, and the design of the quick-disassembly liquid cold plate further reduces the difficulty and cost of machine use and assembly. To sum up, the cooling system can make the motor not easy to generate heat accumulation even if it runs for a long time, and realize the requirements of light weight and miniaturization of the motor. In addition, the heat dissipation structure of the present invention is simple, easy to disassemble and assemble, and has the advantages of energy saving and low cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is a three-dimensional schematic diagram of an embodiment of the present invention;

Fig. 2 is an exploded view of the mover in the embodiment of the present invention;

Fig. 3 is a sectional view of the mover in the embodiment of the present invention;

Figure 4 is an exploded view of a liquid-cooled plate in an embodiment of the present invention;

Fig. 5 is a partial view of the liquid cold plate in the embodiment of the present invention;

Fig. 6 is a three-dimensional view of heat dissipation fins in an embodiment of the present invention;

7 is a two-dimensional top view of the flow of cooling medium in the liquid cold plate in the embodiment of the present invention;

Fig. 8 is a two-dimensional side view of the cooling medium flowing in the liquid cold plate in the embodiment of the present invention;

The drawings show: 1. Cover plate; 2. Liquid cooling plate; 3. Motor silicon steel sheet; 4. Thermal grease; 5. Bottom plate; 6. Mover; 7. Stator; 8. Coil winding; 10. Fixing screws; 11. Cooling fins; 12. Adapter; 13. Guide rail; 14. Magnetic steel; 15. Soft glue water pipe; 16. Water storage groove; 17. Return groove; 18. Liquid inlet; 19. Liquid outlet.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Example:

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof in the embodiments of the present invention are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to Those steps or elements are not explicitly listed, but may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

It is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial", " The orientation or positional relationship indicated by "circumferential direction" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, Constructed and operative in a particular orientation and therefore are not to be construed as limitations of the invention.

In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. In addition, unless otherwise clearly stipulated and limited, the terms "mounted", "connected" and "connected" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical A connection can also be an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first and second feature may be in direct contact with the second feature through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments and are not intended to limit the present invention.

Referring to Figures 1 to 8, the embodiment of the present invention discloses a cooling system for a linear motor and a linear motor. The linear motor includes a stator and a mover that cooperate with each other. The mover is slidably arranged in the stator, and also includes a motor silicon steel sheet 3. The bottom of the motor silicon steel sheet 3 is connected to the iron core 9, and the coil winding 8 is wound on the iron core 9; the thermal conductive silicon grease 4 is provided between the motor silicon steel sheet 3 and the contact surface of the liquid cooling plate 2, and the liquid cooling plate 2 is provided with a heat dissipation The fins 11, the upper middle ends of the liquid cooling plate 2 and the cover plate 1 are respectively provided with a liquid inlet 18 and a liquid outlet 19, and the liquid inlet 18 and the liquid outlet 19 respectively communicate with the internal flow passages of the cooling fins 11 , there is a cooling medium in the cooling fins 11 that can pass through, and the liquid cooling plate 2 and the thermal conductive silicone grease 4 exchange heat with the motor. Wherein, the liquid cooling plate 2 is locked on the silicon steel sheet 3 by fixing screws 10 .

Specifically, the liquid cooling plate 2 in this embodiment indirectly transfers the huge heat from the coil winding to the cooling medium enclosed in the circulation pipeline, and the heat is taken away by the cooling medium. The cooling medium enters the liquid cold plate from the liquid inlet, flows through the cooling fins 11 installed on the cold plate, and then flows out from the liquid outlet to take away heat. The cooling medium flowing out of the liquid cold plate 2 is cooled by the external cooling system and then sent to the liquid cold plate 2 for circulation and cooling.

On the one hand, due to the structure of multiple sets of extended surfaces (radiation fins 11) inside the liquid cold plate 2, the smaller equivalent diameter of the cooling channel, and the use of rib surface geometry that is conducive to enhancing convective heat transfer, etc., the heat exchange can be greatly improved. Density. On the other hand, the convective heat transfer coefficient of the cooling medium used, such as water and oil, is much larger than that of ordinary air. Therefore, the liquid cold plate 2 can very efficiently take away the ohmic heat generated by the winding assembly during operation from the coil winding 8 .

Referring to FIG. 1 , in some embodiments, the stator includes a magnetic steel 14 and a guide rail 13 , the magnetic steel 14 is laid on the guide rail 13 along the length direction of the guide rail, and the mover 6 moves linearly along the length direction of the stator 7 .

In some embodiments, the liquid cooling plate 2 is in surface contact with the silicon steel sheet 3 of the motor, so that the heat transfer path area is larger, and the heat dissipation effect of the motor is fully guaranteed.

Referring to FIG. 4 , in some embodiments, a heat conduction layer is provided between the motor silicon steel sheet 3 and the liquid cooling plate 2 . Among them, by filling gaps between components with a thermally conductive interface material, the contact thermal resistance between devices can be reduced, and the efficiency of heat transfer can be further improved. Preferably, the material of the heat conduction layer can be a heat conduction gasket or heat conduction silicone grease. In this implementation case, the thermal interface material filled between the bottom plate 5 of the liquid cooling plate 2 and the silicon steel sheet 3 of the motor is made of thermally conductive silicone grease 4, so the contact area of the area is large, and the required filling material is more and the range is wider. Grease 4 has the characteristics of high thermal conductivity, excellent insulation, low oil separation, high temperature resistance, and self-adjustable scraping shape. The covered area of the heat-conducting silicone grease 4 can avoid the position of the installation hole, which reduces the difficulty of assembly; and the thickness of the heat-conducting silicone grease 4 can be brushed to be extremely thin, which greatly reduces the thermal resistance in the process of heat transfer.

In some embodiments, the top of the liquid cooling plate 2 is provided with a cover plate 1, the interior of the liquid cooling plate 2 is provided with heat dissipation fins 11, and the bottom end of the liquid cooling plate 2 is provided with a bottom plate 5, and the design of split assembly is adopted. , on the one hand, it is beneficial to the flow channel design and space utilization inside the liquid cold plate 2, and on the other hand, it can reduce the manufacturing difficulty and cost of the product, as shown in FIG. 4 .

In some embodiments, the shape of the liquid cold plate 2 is flat, and this shape can maximize contact with the heat source, and can make full use of the high thermal conductivity of the liquid cold plate. Optionally, the liquid-cooled plate 2 has a flat shape, so that the liquid-cooled plate 2 has a thin thickness and light weight, which can reduce changes to the structure of the motor, and can enhance the heat dissipation performance of the motor while achieving the design goal of light weight.

Referring to Fig. 3, in some embodiments, the liquid cooling plate 2 is provided with a liquid inlet 18 and a liquid outlet 19, wherein the liquid inlet 18 and the liquid outlet 19 are both connected to the cooling fins 11; The port 18 and the liquid outlet 19 are set on the two side surfaces of the cover plate 1. The liquid cooling plate 2 indirectly transfers the huge heat from the coil winding to the cooling medium enclosed in the circulation pipeline, and the heat is carried to the cooling medium through the cooling medium. Walk. The cooling medium enters the liquid cooling plate 2 from the liquid inlet 18, flows through the cooling fins 11 installed on the liquid cooling plate 2, and then flows out from the liquid outlet 19 to take away heat, as shown in FIG. 8 . The cooling medium flowing out of the liquid cold plate 2 is cooled by the external cooling system and then sent to the liquid cold plate 2 for circulation and cooling. The density of heat exchange can be greatly improved due to the structure of multiple sets of extended surfaces (radiation fins 11 ) inside the liquid cooling plate 2 , the smaller equivalent diameter of the cooling channel, and the use of rib surface geometry that is conducive to enhancing convective heat transfer.

In some embodiments, the shape of the cooling fins 11 inside the liquid cooling plate 2 is "a few characters", and the critical Reynolds numbers of the fluids in the microchannels with different cross-sections are all much smaller than the Reynolds numbers of the fluids in the conventional channels, which means that the fluids in the microchannels The flow of fluid can easily reach turbulent flow, which is why the addition of microchannels inside the liquid cooling plate has a strong heat dissipation capacity, as shown in Figure 5.

Optionally, the fins are the main components of the liquid cooling plate 2 and are the basic parts that make up the extended surface of the liquid cooling plate 2 . Its structural shape can be selected from several-shaped, triangular, wavy, porous and zigzag ribs, as shown in Figure 6. The fins of different structures have different characteristics. Because of their small equivalent diameter, the azimuth-shaped fins have a strong heat transfer capability, but the length of the flow channel has a significant impact on the heat transfer effect. Compared with other forms of fins, the heat transfer coefficient The zigzag fins can separate the boundary layer, which is beneficial to promote fluid turbulence, thereby enhancing heat transfer, but its resistance is relatively large; the porous fins can break the thermal boundary layer and make the fluid distribution in the fins more For uniformity, heat transfer in transition and turbulent regions can be enhanced. What this example one selects for use is a few-shaped rib, but not limited to using this shape.

In some embodiments, the height and width of the cooling fins 11 are closely matched with the internal space of the liquid cooling plate 2, so that the cooling medium can flow through the fins evenly to the greatest extent, and the utilization of the cooling fins 11 inside the liquid cooling plate 2 can be improved. efficiency and improve the heat exchange capacity of the liquid cold plate 2 .

In some embodiments, the cooling fins 11 include a plurality of unit flow channels arranged in parallel, and the number of unit flow channels at the ends of the liquid inlet 18 and the liquid outlet 19 is the same; the liquid inlet ends and the liquid outlet ends of the unit flow channels are respectively It is connected with the corresponding liquid inlet 18 and liquid outlet 19, and the reasonable design of the flow path reduces the occurrence of extreme phenomena such as circulation bypass, reverse backflow, and flow blockage in the flow process of the internal cooling medium, as shown in the figure 7. Among them, the inlet and outlet of the liquid cooling plate 2 adopt a conversion joint 12 and a soft glue pipe 15, so that the exposed components of the cooling system can be placed flexibly in multiple directions, or directly placed in the tank chain component with the electrical signal transmission line of the motor, reducing the cooling system. Additional disturbances to motor operation.

In some embodiments, the unit flow channels are arranged on the same horizontal plane, and the unit flow channels are arranged as linear flow channels to reduce the resistance during the flow of the cooling medium.

Referring to FIG. 7 , in some embodiments, the cooling medium flow circuit inside the liquid cold plate 2 is a "U"-shaped return channel, in which the cooling medium can be reasonably and efficiently connected with the cooling fins 11 in the liquid cold plate 2 The heat exchange is sufficient, and the water storage groove 16 and the return groove 17 are set inside the liquid cooling plate. It is understandable that this combination design of the flow channel can make the heat distribution of the motor more uniform and effectively improve the flow channel space of the liquid cooling plate degree of utilization.

In some embodiments, the cooling medium can be water. Specifically, the nature of the cooling medium also has an important impact on the heat dissipation effect of the liquid cold plate 2. When selecting a coolant, the thermal characteristics, physical characteristics, electrical characteristics, compatibility, and economy of the cooling medium are mainly considered. For the liquid cold plate 2. Since the fluid is not in direct contact with the electronic components, the conductivity of the coolant is not considered, but its corrosive and thermal characteristics are mainly considered. Considering various factors, the cooling medium used in this example is water.

In some embodiments, the liquid cooling plate 2 is made of aluminum alloy. Specifically, the base material of the liquid cooling plate 2 is usually made of copper, aluminum and other plates with good thermal conductivity. Although copper has a high thermal conductivity, considering the high requirements of the motor for motion and load performance, the selection of materials for the cooling system must balance thermal conductivity. Considering the performance and quality, this example chooses the aluminum alloy material with low material cost, light weight, mature production process and excellent thermal conductivity.

In some embodiments, the installation position of the liquid cooling plate 2 is directly above the coil winding 8. When the linear motor works, the coil winding 8 generates heat and heats up, and the heat is transferred to the silicon steel sheet 3 through the iron core 9, while the heat in the middle Accumulation is the most serious area. The arrangement, shape and installation position design of the liquid cooling plate can ensure the rapid and high-efficiency secondary transmission of heat to the maximum extent, thereby improving the heat exchange capacity between the motor and the outside world and reducing the heat loss of the coil winding 8. temperature rise.

In some embodiments, the liquid cooling plate 2 adopts a detachable structural design, and the fixing screw 10 is used to lock the liquid cooling plate 2 on the silicon steel sheet 3 of the motor. Considering the complex working mode of the motor, when the motor is under low load, In low-performance modes such as low speed, the liquid cooling plate 2 can be disassembled to improve energy efficiency; when the motor is in high-performance modes such as high load, high precision, and high acceleration, the liquid energy plate will be able to solve thermal runaway well The problem of ensuring the reliable operation of the motor, and the design of the quick-disassembly liquid cooling plate further reduces the difficulty and cost of machine use and assembly, as shown in Figure 2.

To sum up, the present invention designs a detachable liquid cooling plate 2 that matches the linear motor by studying the geometric parameters, electromagnetic performance and operating conditions of the motor. The liquid cooling plate 2 is installed on the motor silicon steel sheet 3, wherein the side of the bottom plate 5 of the liquid cooling plate 2 is provided with a thermal interface material, which is used to reduce the thermal resistance during the surface contact process of the device and enhance the effective transfer of heat. The liquid cooling plate 2 indirectly transfers the huge heat from the coil winding 8 to the cooling medium enclosed in the circulation pipeline, and the heat is taken away by the cooling medium. The cooling medium enters the liquid cold plate from the liquid inlet 18, flows through the cooling fins 11 installed on the cold plate, and then flows out from the liquid outlet 19 to take away heat. The cooling medium flowing out of the liquid cold plate 2 is cooled by the external cooling system and then sent to the liquid cold plate 2 for circulation and cooling.

On the one hand, due to the structure of multiple sets of extended surfaces (radiation fins 11) inside the liquid cold plate 2, the smaller equivalent diameter of the cooling channel, and the use of rib surface geometry that is conducive to enhancing convective heat transfer, etc., the heat exchange can be greatly improved. Density. On the other hand, the convective heat transfer coefficient of the cooling medium used, such as water and oil, is much larger than that of ordinary air. Therefore, the liquid cold plate can very efficiently take away the ohmic heat generated by the winding assembly during operation from the winding assembly.

Among them, considering the complex working mode of the motor, when the motor is in a low-performance mode such as low load and low speed, the liquid cooling plate 2 can be disassembled to improve energy efficiency; In the high-performance mode, the liquid energy plate can well solve the problem of thermal runaway and ensure the reliable operation of the motor, and the design of the quick-disassembly liquid cold plate 2 further reduces the difficulty and cost of machine use and assembly. . To sum up, the cooling system can make the motor not easy to generate heat accumulation even if it runs for a long time, and realize the requirements of light weight and miniaturization of the motor. In addition, the heat dissipation structure of the present invention is simple, easy to disassemble and assemble, and has the advantages of energy saving and low cost.

Matters not covered in the present invention are known technologies.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and its purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the essence of the content of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A cooling system for a linear motor, comprising:

the rotor comprises a motor silicon steel sheet, wherein the bottom of the motor silicon steel sheet is connected with an iron core, and a coil winding is wound on the iron core; the top of motor silicon steel sheet is equipped with the liquid cooling board, the motor silicon steel sheet with be equipped with the heat conduction interface material between the contact surface of liquid cooling board, the inside of liquid cooling board is provided with heat radiation fins, just heat radiation fins is formed with the runner that supplies the cooling medium to flow, the inside of liquid cooling board is provided with inlet and liquid outlet, the inlet with the liquid outlet link up with the runner that heat radiation fins formed respectively.

2. The cooling system for a linear motor according to claim 1, wherein the liquid cooling plate is in surface contact with the motor silicon steel sheet.

3. The cooling system for a linear motor according to claim 1, wherein a cover plate is provided at a top end of the liquid cooling plate, a bottom plate is provided at a bottom end of the liquid cooling plate, and the heat radiation fins are provided between the cover plate and the bottom plate.

4. A cooling system for a linear motor according to claim 3, wherein the liquid inlet and the liquid outlet are provided on the side surfaces of the cover plate, respectively.

5. The cooling system for a linear motor of claim 1, wherein the cross-sectional area of the heat sink fin is one of a zig-zag, a triangle, a wave, a porous shape, or a zigzag shape.

6. The cooling system for a linear motor according to claim 1, wherein a plurality of unit flow passages are formed in parallel in the flow passage through which the cooling medium flows, the number of the unit flow passages on the liquid inlet side and the number of the unit flow passages on the liquid outlet side are the same, and the liquid inlet side and the liquid outlet side of the unit flow passages are respectively communicated with the liquid inlet and the liquid inlet.

7. The cooling system for a linear motor according to claim 6, wherein the unit flow passages are disposed on the same horizontal plane, and the unit flow passages are disposed as linear flow passages.

8. The cooling system for a linear motor according to claim 1, wherein the flow passage through which the cooling medium flows is a U-shaped return flow passage.

9. The cooling system for a linear motor of claim 1, wherein the thermally conductive interface material is a thermally conductive silicone grease; the cooling medium is water; the liquid cooling plate is made of aluminum alloy.

10. A linear motor with a cooling system according to any one of claims 1 to 9, further comprising a stator cooperating with the mover, the mover being slidably arranged in the stator, the stator comprising magnetic steel and a guide rail, the magnetic steel being laid along the length direction of the guide rail.

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