CN116388465A

CN116388465A - Cooling system for linear motor and linear motor

Info

Publication number: CN116388465A
Application number: CN202310379741.4A
Authority: CN
Inventors: 王长宏; 陈炜华; 杨光; 李茂生
Original assignee: Guangdong University of Technology
Current assignee: Guangdong University of Technology
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-07-04
Also published as: JP2024150388A

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

Cooling system for linear motor and 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

The permanent magnet linear motor has the remarkable advantages of high thrust density, high acceleration, high speed, high precision, high efficiency and the like, and is widely applied to high-precision numerical control equipment, photoetching machines and other application occasions.

In order to improve the thrust density and realize high-acceleration operation, a larger current density is usually required to be applied, and larger loss is generated, and the loss is used as a heat source to enable the temperature of the motor to rise rapidly, so that the temperature rise limit of the insulation of a motor winding or the temperature rise limit of a permanent magnet material can be exceeded, if no measures are taken for protection and prevention, the insulation material of the motor is likely to be aged, the structure is deformed, the permanent magnet material demagnetizes or loses magnetism, the hottest spot in the motor winding and back iron is established and diffused, and the motor is thoroughly damaged and cannot operate. Therefore, the cooling system is very necessary to be arranged on the motor, so that the motor can inhibit the temperature rise of the motor, improve the overload capacity and continuously output thrust of the motor under different working conditions, and ensure the safe operation of the motor.

Disclosure of Invention

Aiming at the problem of insufficient heat dissipation capacity of a linear motor in the prior art, the invention provides a cooling system for the linear motor and the linear motor, which can improve the heat dissipation efficiency and the operation efficiency of the linear motor.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

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.

The cooling system for the linear motor is further characterized in that the liquid cooling plate is in surface contact with the motor silicon steel sheet.

The cooling system for the linear motor is further characterized in that a cover plate is arranged at the top end of the liquid cooling plate, a bottom plate is arranged at the bottom end of the liquid cooling plate, and the heat radiation fins are arranged between the cover plate and the bottom plate.

The cooling system for the linear motor is further characterized in that the liquid inlet and the liquid outlet are respectively arranged on the side face of the cover plate.

The cooling system for a linear motor as described above, further, the cross-sectional area of the heat dissipation fin is one of a shape of a letter of a triangle, a wave, a porous shape, or a zigzag.

The cooling system for the linear motor is further characterized in that a plurality of parallel unit flow channels are formed in the flow channel for cooling medium to flow, the number of the unit flow channels on the liquid inlet side is the same as that of the unit flow channels on the liquid outlet side, and the liquid inlet side and the liquid outlet side of the unit flow channels are respectively communicated with the liquid inlet and the liquid inlet correspondingly.

The cooling system for a linear motor as described above, further, the unit flow passages are disposed on the same horizontal plane, and the unit flow passages are disposed as linear flow passages.

The cooling system for a linear motor as described above, further, the flow passage through which the cooling medium flows is a U-shaped reentrant flow passage.

The cooling system for a linear motor as described above, further 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.

The linear motor with the cooling system further comprises a stator matched with the rotor, the rotor is arranged in the stator in a sliding mode, the stator comprises magnetic steel and a guide rail, and the magnetic steel is paved along the length direction of the guide rail.

Compared with the prior art, the invention has the beneficial effects that: the invention combines the researches on the geometric parameters, electromagnetic performance and operation conditions of a motor, and designs a detachable liquid cooling plate matched with a linear motor, wherein the liquid cooling plate is arranged on a silicon steel sheet of the motor, and a heat conduction interface material is arranged on the bottom plate side of the liquid cooling plate and used for reducing the thermal resistance in the device surface contact process and enhancing the effective transfer of heat. The liquid cooling plate indirectly transfers huge heat from the coil winding to a cooling medium enclosed in a circulation pipeline, and the heat is taken away by the cooling medium. The cooling medium enters the liquid cooling plate from the liquid inlet, flows out of the liquid outlet after flowing through the heat dissipation fins arranged on the cold plate, and takes away heat. The cooling medium flowing out of the cold liquid plate is cooled by an external cooling system and then is sent into the cold liquid plate for circulating cooling.

On one hand, the density of heat exchange can be greatly improved due to the structure (radiating fins) with a plurality of groups of expansion surfaces, smaller equivalent diameter of the cooling channel, the adoption of the geometric shape of the rib surface which is favorable for enhancing convection heat exchange and the like. On the other hand, the convective heat transfer coefficient of the cooling medium such as water, oil and the like is much larger than that of ordinary air. The liquid cooling plate can very efficiently take away ohmic heat generated by the winding assembly during operation from the winding assembly.

The complex working mode of the motor is considered, and when the motor is in a low-performance mode such as low load, low speed and the like, the liquid cooling plate can be detached, so that the energy utilization efficiency is improved; when the motor is in high-performance modes such as high load, high precision, high acceleration and the like, the liquid energy plate can well solve the problem of thermal runaway, the reliable operation of the motor is ensured, and the difficulty and cost in the aspects of machine use, assembly and the like are further reduced due to the design of the liquid cooling plate which is quickly assembled and disassembled. In summary, the cooling system can make the motor not easy to generate heat accumulation even if the motor runs for a long time, thereby realizing the requirements of light weight and miniaturization of the motor. In addition, this heat radiation structure is simple, and convenient dismouting has advantages such as energy-conservation, with low costs.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a three-dimensional schematic of an embodiment of the invention;

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

FIG. 3 is a cross-sectional view of a mover in an embodiment of the present invention;

FIG. 4 is an exploded view of a liquid cooling plate according to an embodiment of the present invention;

FIG. 5 is a partial view of a liquid cooling plate according to an embodiment of the present invention;

fig. 6 is a three-dimensional view of a heat sink fin according to an embodiment of the present invention;

FIG. 7 is a two-dimensional plan view of the flow of cooling medium in a liquid cooling plate according to an embodiment of the present invention;

FIG. 8 is a two-dimensional side view of the flow of cooling medium in a liquid cooling plate according to an embodiment of the present invention;

the accompanying drawings show: 1. a cover plate; 2. a liquid cooling plate; 3. a motor silicon steel sheet; 4. heat conductive silicone grease; 5. a bottom plate; 6. a mover; 7. a stator; 8. a coil winding; 9. an iron core; 10. a set screw; 11. a heat radiation fin; 12. a conversion joint; 13. a guide rail; 14. magnetic steel; 15. a flexible glue water pipe; 16. a water storage groove; 17. a reflow groove; 18. a liquid inlet; 19. and a liquid outlet.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Examples:

it should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, 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," "counter-clockwise," "axial," "radial," "circumferential," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 8, the embodiment of the invention discloses a cooling system for a linear motor and the linear motor, wherein the linear motor comprises a stator and a rotor which are matched with each other, the rotor is arranged in the stator in a sliding manner, the linear motor further comprises a motor silicon steel sheet 3, the bottom of the motor silicon steel sheet 3 is connected with an iron core 9, and a coil winding 8 is wound on the iron core 9; the heat conduction silicone grease 4 is arranged between the contact surface of the motor silicon steel sheet 3 and the liquid cooling plate 2, the heat radiation fins 11 are arranged in the liquid cooling plate 2, the liquid inlets 18 and the liquid outlets 19 are respectively arranged at the two ends of the middle part of the upper side of the cover plate 1 of the liquid cooling plate 2, the liquid inlets 18 and the liquid outlets 19 are respectively communicated with the inner flow passages of the heat radiation fins 11, cooling medium can pass through the heat radiation fins 11, and the heat exchange is carried out between the liquid cooling plate 2 and the heat conduction silicone grease 4 and the motor. Wherein, the liquid cooling plate 2 is locked on the silicon steel sheet 3 through a fixing screw 10.

Specifically, the liquid cooling plate 2 in the present embodiment indirectly transfers the huge heat from the coil winding to the cooling medium enclosed in the circulation line, and takes away the heat by the cooling medium. The cooling medium enters the liquid cooling plate from the liquid inlet, flows out from the liquid outlet after flowing through the cooling fins 11 arranged on the cooling plate, and takes away heat. The cooling medium flowing out of the liquid cooling plate 2 is cooled by an external cooling system and then sent into the liquid cooling plate 2 for circulating cooling.

On the one hand, the heat exchange density can be greatly improved due to the structure (radiating fins 11) with a plurality of groups of expansion surfaces, smaller equivalent diameter of the cooling channels, the adoption of the geometric shape of the rib surface which is favorable for enhancing the convection heat exchange and the like in the liquid cooling plate 2. On the other hand, the convective heat transfer coefficient of the cooling medium such as water, oil and the like is much larger than that of ordinary air. The liquid cooling plate 2 is able to very efficiently remove ohmic heat generated by the winding assembly during operation from the coil windings 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 motor silicon steel sheet 3, so that the heat transfer path area is larger, and the heat dissipation effect of the motor is fully ensured.

Referring to fig. 4, in some embodiments, a heat conductive layer is provided between the motor silicon steel sheet 3 and the liquid cooling plate 2. The gaps among the components are filled with the heat conduction interface material, so that the contact thermal resistance among devices can be reduced, and the heat transfer efficiency is further improved. Preferably, the material of the heat conducting layer may be a heat conducting spacer or a heat conducting silicone grease. In the embodiment, the thermal interface material filled between the bottom plate 5 of the liquid cooling plate 2 and the motor silicon steel sheet 3 is heat-conducting silicone grease 4, so that the area contact area is large, more materials are required to be filled, the range is wide, and the heat-conducting silicone grease 4 has the characteristics of high heat conductivity, excellent insulativity, low oil separation degree, high temperature resistance, self-adjusting blade coating shape and the like. The heat conduction silicone grease 4 covers the position which can avoid the mounting hole, so that the assembly difficulty is reduced; and the thickness of the heat-conducting silicone grease 4 can be brushed to be extremely thin, so that the thermal resistance in the heat transfer process is greatly reduced.

In some embodiments, the top of the liquid cooling plate 2 is provided with the cover plate 1, the inside of the liquid cooling plate 2 is provided with the heat radiation fins 11, the bottom of the liquid cooling plate 2 is provided with the bottom plate 5, and the split assembly design is adopted, so that on one hand, the flow channel design and space utilization inside the liquid cooling plate 2 are facilitated, and on the other hand, the manufacturing difficulty and cost of the product can be reduced, as shown in fig. 4.

In some embodiments, the liquid cooling plate 2 is flat, and can contact the heat source to the maximum extent, so that the high heat conductivity of the liquid cooling plate can be utilized more fully. Alternatively, the liquid cooling plate 2 is in a flat shape, so that the thickness of the liquid cooling plate 2 is thin, the weight is light, the change of the motor structure can be reduced, the heat dissipation performance of the motor is enhanced, and the design target of light weight is achieved.

Referring to fig. 3, in some embodiments, the liquid cooling plate 2 is provided with a liquid inlet 18 and a liquid outlet 19, where the liquid inlet 18 and the liquid outlet 19 are both in communication with the heat dissipation fins 11; the liquid inlet 18 and the liquid outlet 19 are arranged on two side end surfaces of the cover plate 1, and the liquid cooling plate 2 indirectly transfers huge heat from the coil winding to a cooling medium sealed in a circulation pipeline, and the heat is taken away by the cooling medium. The cooling medium enters the liquid cooling plate 2 from the liquid inlet 18, flows through the cooling fins 11 arranged 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 cooling plate 2 is cooled by an external cooling system and then sent into the liquid cooling plate 2 for circulating cooling. Because the liquid cooling plate 2 is internally provided with a plurality of groups of structures (radiating fins 11) with expansion surfaces, the equivalent diameter of a smaller cooling channel, the geometric shape of the rib surface which is favorable for enhancing the convection heat exchange and the like, the heat exchange density can be greatly improved.

In some embodiments, the heat dissipation fins 11 inside the liquid cooling plate 2 are shaped like a Chinese character 'ji', and the critical reynolds numbers of the fluids in the micro-channels with different cross sections are far smaller than those of the fluids in the conventional channels, which means that the flow of the fluids in the micro-channels can easily reach turbulent flow, which is why the micro-channels added inside the liquid cooling plate have strong heat dissipation capability, as shown in fig. 5.

Alternatively, the ribs are the main elements of the liquid cooling plate 2 and are the basic parts constituting the extended surface of the liquid cooling plate 2. The structural shape of the utility model can be selected from the shape of a Chinese character 'ji', triangle, wave, porous and zigzag rib, as shown in figure 6. The ribs with different structures have different characteristics, the heat transfer capacity of the rectangular ribs is strong because the equivalent diameter of the rectangular ribs is small, but the length of the flow channel has obvious influence on the heat transfer effect, and compared with other ribs, the heat exchange coefficient and the resistance of the rectangular ribs are smaller; the zigzag rib can separate the boundary layer, which is beneficial to promoting the turbulent flow of the fluid, thereby enhancing the heat exchange, but the resistance is larger; the porous ribs can break the thermal boundary layer, so that the fluid is distributed more uniformly in the fins, and the heat transfer of the transition area and the turbulent flow area can be enhanced. The present example uses a figure-shaped rib, but is not limited to the use of this shape.

In some embodiments, the height and width of the heat dissipation fins 11 are tightly matched with the internal space of the liquid cooling plate 2, so that the cooling medium can uniformly flow through the fins to the greatest extent, the utilization efficiency of the heat dissipation fins 11 in the liquid cooling plate 2 is improved, and the heat exchange capacity of the liquid cooling plate 2 is improved.

In some embodiments, the heat dissipation fins 11 include a plurality of parallel unit flow channels, and the number of the unit flow channels at the liquid inlet 18 and the liquid outlet 19 is the same; the liquid inlet end and the liquid outlet end of the unit flow channel are respectively communicated with the corresponding liquid inlet 18 and the corresponding liquid outlet 19, and the reasonable flow channel path design reduces the occurrence of extreme phenomena such as circulation bypass, reverse backflow, flow blockage and the like generated by the internal cooling medium in the flowing process, as shown in fig. 7. The liquid inlet end and the liquid outlet end of the liquid cooling plate 2 adopt the adapter 12 and the soft glue pipe 15, so that an exposed component of the cooling system can be flexibly placed in multiple directions, or the exposed component and an electric signal transmission line of the motor are directly placed in a tank chain component, and extra interference brought by the cooling system to the operation of the motor is reduced.

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, so that resistance in the flowing process of the cooling medium is reduced.

Referring to fig. 7, in some embodiments, the cooling medium flow circuit inside the liquid cooling plate 2 is a "U" type turn-back flow channel, in which, in order to make the cooling medium reasonably and efficiently exchange heat with the heat dissipation fins 11 inside the liquid cooling plate 2, a water storage groove 16 and a return groove 17 are provided inside the liquid cooling plate, and it is understood that the flow channel combination design can make the heat distribution of the motor more uniform and effectively increase the utilization degree of the flow channel space of the liquid cooling plate.

In certain embodiments, the cooling medium may be water. Specifically, the nature of the cooling medium also has an important influence on the heat dissipation effect of the liquid cooling plate 2, and when the cooling medium is selected, the thermal property, physical property, electrical property, compatibility and economy of the cooling medium are mainly considered, and the liquid cooling plate 2 is not directly contacted with the electronic components by the fluid, so that the conductivity of the cooling medium is not considered, but the corrosiveness and thermal property of the cooling medium are mainly considered. The cooling medium used in this example is water, which combines various factors.

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 a copper plate, an aluminum plate or the like with good heat conduction performance, and the aluminum alloy material with low material cost, light weight, mature production process and good heat conduction performance is selected in the example because the heat conduction performance and quality of the material selection of the cooling system are balanced in consideration of the high requirements of the motor on the motion and load performance.

In some embodiments, the installation position of the liquid cooling plate 2 is just above the coil winding 8, when the linear motor works, the coil winding 8 heats up, heat is transferred to the silicon steel sheet 3 through the iron core 9, the middle heat accumulation is the most serious area, and the arrangement, the shape and the installation position design of the liquid cooling plate can ensure that the heat can be quickly and efficiently transferred for the second time to the greatest extent, thereby improving the heat exchange capacity of the motor and the outside and reducing the temperature rise of the coil winding 8.

In some embodiments, the liquid cooling plate 2 adopts a detachable structural design, and the liquid cooling plate 2 is locked on the motor silicon steel sheet 3 by using the fixing screws 10, so that the liquid cooling plate 2 can be detached when the motor is in a low-performance mode such as a low load mode, a low speed mode and the like in consideration of a complex working mode of the motor, and the energy consumption efficiency is improved; and when the motor is in high-performance modes such as high load, high precision, high acceleration and the like, the liquid energy plate can well solve the problem of thermal runaway, the reliable operation of the motor is ensured, and the difficulty and cost in the aspects of machine use, assembly and the like are further reduced due to the design of the liquid cooling plate which is quickly assembled and disassembled, as shown in figure 2.

In summary, the invention designs the detachable liquid cooling plate 2 matched with the linear motor through researching the geometric parameters, electromagnetic performance and operation condition of the motor. The liquid cooling plate 2 is arranged on the motor silicon steel sheet 3, wherein a heat conduction interface material is arranged on the side of the bottom plate 5 of the liquid cooling plate 2 and used for reducing the thermal resistance in the device surface contact process and strengthening 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 line, and the heat is taken away by the cooling medium. The cooling medium enters the liquid cooling plate from the liquid inlet 18, flows through the cooling fins 11 arranged on the cooling plate, and flows out from the liquid outlet 19 to take away heat. The cooling medium flowing out of the liquid cooling plate 2 is cooled by an external cooling system and then sent into the liquid cooling plate 2 for circulating cooling.

On the one hand, the heat exchange density can be greatly improved due to the structure (radiating fins 11) with a plurality of groups of expansion surfaces, smaller equivalent diameter of the cooling channels, the adoption of the geometric shape of the rib surface which is favorable for enhancing the convection heat exchange and the like in the liquid cooling plate 2. On the other hand, the convective heat transfer coefficient of the cooling medium such as water, oil and the like is much larger than that of ordinary air. The liquid cooling plate can very efficiently take away ohmic heat generated by the winding assembly during operation from the winding assembly.

Considering the complex working mode of the motor, when the motor is in a low-performance mode such as low load, low speed and the like, the liquid cooling plate 2 can be disassembled, so that the energy utilization efficiency is improved; when the motor is in high-performance modes such as high load, high precision, high acceleration and the like, the liquid energy plate can well solve the problem of thermal runaway, the reliable operation of the motor is ensured, and the difficulty and cost in the aspects of machine use, assembly and the like are further reduced due to the design of the liquid cooling plate 2 which is quickly assembled and disassembled. In conclusion, the cooling system can enable the motor to not easily generate heat accumulation even if the motor runs for a long time, and meets the requirements of motor weight reduction and miniaturization. In addition, this heat radiation structure is simple, and convenient dismouting has advantages such as energy-conservation, with low costs.

The invention is not a matter of the known technology.

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

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the essence of the present invention are intended to be included within the scope of the present invention.

Claims

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

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.