Coreless linear motor with integrated heat dissipation structure

Abstract

The invention provides a coreless linear motor with an integrated heat dissipation structure, and belongs to the technical field of coreless linear motors, the coreless linear motor comprises stators, the stators adopt a double-stator structure, the double stators are horizontally and symmetrically arranged, a first magnet group and a second magnet group are symmetrically arranged in the stators, a mover is arranged between the first magnet group and the second magnet group, and the first magnet group and the second magnet group are symmetrically arranged in the mover. The moving direction of the mover is defined as front and back; the rotor comprises a horizontally-arranged heat dissipation plate, coil windings wound at the two ends of the heat dissipation plate and a fixed table fixedly installed in the middle of the heat dissipation plate, and the heat dissipation plate is of a hollow structure; according to the scheme, the heat dissipation structure is integrated into the coreless linear motor, the capillary columns are arrayed in the middle area in the heat dissipation plate, the heat conduction grooves or the heat conduction pipes are arranged in the areas on the two sides of the heat dissipation plate and filled with the phase change heat dissipation media, the cooling channels are formed in the positions, corresponding to the fixing tables, of the capillary columns, and the capillary effect is utilized, so that rapid transfer and dissipation of heat are promoted; rapid heat dissipation of the coreless linear motor is realized, and the working stability of the coreless linear motor is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of coreless linear motors, and in particular to an ironless linear motor with an integrated heat dissipation structure. Background Art

[0002] A linear motor is an electric motor that directly converts electrical energy into linear motion. It consists of two parts: a stator and a mover. The interaction between the magnetic field and the permanent magnet enables the mover to move along a straight path.

[0003] The ironless linear motor is a special type of linear motor. Compared with the traditional ironcore design, it successfully avoids the performance degradation and efficiency reduction problems caused by factors such as cogging, hysteresis loss and eddy current loss. However, the ironless linear motor still faces the problem of heat dissipation. Due to the structural design of the ironless linear motor, its heat dissipation path is relatively long, the thermal resistance is large, and the heat dissipation efficiency is low. The heat generated by the coil winding during operation is easy to accumulate, which eventually causes the local temperature of the linear motor to rise abnormally, causing the speed and accuracy of the mover movement to fluctuate, the working performance of the linear motor to decline, and even cause damage to the linear motor in severe cases. Summary of the invention

[0004] The object of the present invention is to provide an ironless linear motor with an integrated heat dissipation structure to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An ironless linear motor with an integrated heat dissipation structure, comprising:

[0007] The stator adopts a double stator structure, the double stators are arranged horizontally and symmetrically, a first magnet group and a second magnet group are symmetrically arranged inside the stator, a mover is arranged between the first magnet group and the second magnet group, and the direction of movement of the mover is defined as forward and backward;

[0008] A mover, the mover comprising a horizontally arranged heat sink, a coil winding wound on both ends of the heat sink and a fixed platform fixedly installed in the middle of the heat sink, the heat sink is a hollow structure, a plurality of capillary columns are fixedly installed in the middle area of ​​the heat sink along the vertical direction, and a heat conducting structure is arranged in the left and right directions on both sides of the heat sink, and the heat sink is filled with a phase change heat dissipation medium;

[0009] A plurality of cooling channels are provided at the position where the fixing platform contacts the heat sink. The fixing platform is also provided with mounting holes, through which the fixing platform is connected to a limiting mechanism, and the limiting mechanism is used to limit the installation height and movement direction of the mover.

[0010] Preferably, the stator is of a "C" - shaped structure, and the first magnet group and the second magnet group are respectively and uniformly arranged at the top and bottom inside the stator.

[0011] Preferably, the coil winding is located between the first magnet group and the second magnet group and maintains an equal linear distance from both.

[0012] Preferably, the magnets in the first magnet group and the second magnet group are all permanent magnets.

[0013] Preferably, the outside of the heat dissipation plate is coated with an insulating and heat - conducting coating for isolating the coil winding.

[0014] Preferably, the heat - conducting structure is a heat - conducting groove.

[0015] Preferably, the heat - conducting structure is a groove - shaped heat - conducting tube, and the heat - conducting tubes are fixedly arranged through heat - conducting resin. The heat - conducting tubes are directly connected to the area where the capillary columns are located.

[0016] Preferably, the limiting mechanism includes tracks arranged on both outer sides of the double - stator structure. The tracks are horizontally arranged in the front - to - back direction, and a support arm is slidably mounted on the tracks. The support arm is fixedly connected to the stator through a mounting hole.

[0017] The beneficial effects of the above - mentioned technical solutions of the present invention are as follows:

[0018] In this solution, the heat - dissipation structure is integrated into the ironless linear motor. By arranging capillary columns in an array in the middle area inside the heat - dissipation plate, heat - conducting grooves or heat - conducting tubes are arranged in the two side areas, and a phase - change heat - dissipation medium is filled. Cooling channels are arranged in the area corresponding to the fixed platform of the capillary columns. Utilizing the capillary effect, the rapid transfer and dissipation of heat are promoted, realizing the rapid heat - dissipation of the ironless linear motor and ensuring its working performance and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the following detailed description with reference to the accompanying drawings, the above - mentioned and other objects, features, and advantages of the exemplary embodiments of the present invention will become easily understandable. In the drawings, several embodiments of the present invention are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, where:

[0020] Figure 1 is a three - dimensional structure schematic diagram of the stator and the mover;

[0021] Figure 2 is Figure 1 the schematic cross - sectional view of A - A' of

[0022] Figure 3 is the internal structure schematic diagram of the heat - dissipation plate;

[0023] Figure 4for Figure 3 Schematic diagram of the B-B' section;

[0024] Figure 5 Schematic cross-sectional view of the heat pipe region of Example 2.

[0025] Description of reference numerals:

[0026] 1. stator; 11. first magnet group; 12. second magnet group; 2. mover; 21. heat sink; 211. capillary column; 212. heat conduction groove; 213. heat conduction pipe; 22. coil winding; 23. fixing platform; 231. cooling channel; 232. mounting hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] In the prior art, the coreless linear motor has a low heat dissipation efficiency due to its long heat dissipation path and large thermal resistance during use, which easily causes fluctuations in the speed and accuracy of the movement of the mover 2. The present invention provides an ironless linear motor with an integrated heat dissipation structure, which achieves rapid heat dissipation by filling a phase-change heat dissipation medium inside the heat dissipation plate 21, installing a capillary column 211 in an array in the middle S1 region inside the heat dissipation plate 21, and setting heat-conducting grooves 212 in the S2 regions on both sides of the heat dissipation plate 21. The principle is to utilize the capillary effect, the phase-change heat dissipation medium evaporates in the S2 region, and diffuses to the S1 region driven by the pressure difference. The diffused steam takes away a large amount of heat, and condenses through heat exchange with the cooling medium in the cooling channel 231 through the array capillary column 211 to release heat. In this process, the condensed phase-change heat dissipation medium in the S1 region moves to the S1 region to supplement the evaporated part and perform cyclic heat dissipation.

[0029] After introducing the basic principle of the present invention, various non-limiting embodiments of the present invention are described in detail below. The number of any element in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0030] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0031] Example 1

[0032] An ironless linear motor with an integrated heat dissipation structure, such as Figure 1-4As shown in the figure, it includes a stator 1. The structure of the stator 1 is in the shape of a "C". There are two stators 1 designed. The openings of the two stators 1 face each other and are horizontally symmetrically and fixedly installed on a base (not shown in the figure). The "C" - shaped structure and the relative installation method of the two stators 1 make the design more compact and save the installation space. In addition, the horizontal symmetric fixed installation helps to maintain the balance and stability of the overall structure of the linear motor. At the top inside the "C" - shaped structure of the stator 1, a first magnet group 11 is fixedly installed, and at the bottom, a second magnet group 12 is fixedly installed. The magnets in both the first magnet group 11 and the second magnet group 12 are permanent magnets and are evenly arranged, which is used to provide a stable magnetic field for the movement of the mover 2, ensuring that the mover can move efficiently along a predetermined path.

[0033] As Figure 1-2 shown in the figure, the mover 2 is installed between the stators 1 through a limiting mechanism (not shown in the figure). The mover 2 includes a heat - dissipation plate 21, a coil winding 22, and a fixing platform 23. Among them, the heat - dissipation plate 21 is horizontally arranged, and its surface is coated with an insulating and heat - conductive coating (such as boron nitride), which not only ensures electrical insulation but also enhances heat conduction ability, providing a good working environment for the coil winding 22. The two ends of the heat - dissipation plate 21 extend into the stator 1 through the openings of the stator 1 respectively. The coil winding 22 is wound around the two ends of the heat - dissipation plate 21. The coil winding 22 is located between the first magnet group 11 and the second magnet group 12, and the linear distance from it to both of them is equal. The coil winding 22 is used to generate a changing magnetic field when electrified. This magnetic field interacts with the constant magnetic field generated by the permanent magnets, thereby providing a driving force for the movement of the mover 2.

[0034] A fixing platform 23 is fixedly installed in the middle of the heat - dissipation plate 21. An installation hole 232 is opened on the fixing platform 23. Four unperforated cooling channels 231 are opened at the position where the fixing platform 23 contacts the heat - dissipation plate 21. In this embodiment, each cooling channel 231 is further divided into upper and lower layers by the heat - dissipation plate 21. The cooling medium enters from the upper part and exits from the lower part or enters from the lower part and exits from the upper part of each cooling channel 231, reducing the heat generated during the operation of the coil winding 22 through heat exchange. In other embodiments, the inlet and outlet methods of the cooling channels 231 can be freely combined, or a completely perforated method can be adopted.

[0035] As Figure 3-4As shown, the heat sink 21 is a hollow structure, and a plurality of capillary columns 211 are fixedly installed in the vertical direction in the S1 region inside the heat sink 21 in a micro-array shape. The capillary column 211 structure is suitable for rapid longitudinal heat conduction of the thin plate, so that the coldness of the cooling channel 231 is quickly transferred to the S1 region; heat conduction grooves 212 are opened in the left and right directions in the S2 regions on both sides of the heat sink 21, and the interior of the heat sink 21 is filled with a phase change heat dissipation medium. The structure of the heat conduction grooves 212 is relied on to achieve high-efficiency heat conduction over a long distance, and heat is exchanged between the S1 region and the cooling medium in the cooling channel 231 to achieve the purpose of rapid heat dissipation, allowing the temperature rise to be effectively controlled even under high-power operating conditions, thereby ensuring the continuous stability of the performance of the linear motor.

[0036] The limiting mechanism (not shown) includes a track and a support arm. In the present embodiment, there are two tracks, which are fixedly mounted on the base outside the two stators 1. In other embodiments, the track can also be fixedly connected to the outer wall of the stator 1. The track is installed parallel to the stator 1 in the front-to-back direction. A support arm is also slidably mounted on the track. The support arm is fixedly connected to the fixed platform 23 through the mounting hole 232, ensuring that the mover 2 can move smoothly on the preset track and avoid position deviation caused by external force or its own inertia. This is very important for maintaining the normal operation of the motor, especially under high-speed or heavy-load conditions; the support arm is also used to adjust and limit the height of the mover 2 to ensure that the coil is always located in the middle of the first magnet group 11 and the second magnet group 12.

[0037] Working principle of the present invention: During operation, the coil winding 22 will generate ohmic heat. In this solution, the capillary column 211, the heat-conducting groove 212 and the cooling channel 231 work together to form an efficient heat dissipation network. This network can quickly transfer the generated heat from the heat source, maintain a low operating temperature, and thus extend the life of the motor and improve work efficiency. Specifically, this solution utilizes the capillary effect, and the phase-change heat dissipation medium evaporates in the S2 area and diffuses to the S1 area driven by the pressure difference. The diffused steam takes away a large amount of heat and condenses through heat exchange with the cooling medium circulating in the cooling channel 231 through the array capillary column 211, releasing heat. In this process, the condensed phase-change heat dissipation medium in the S1 area moves to the S1 area to supplement the evaporated part and perform cyclic heat dissipation. This solution promotes the rapid transfer and dissipation of heat, realizes the rapid heat dissipation of the coreless linear motor, and ensures its working performance and stability.

[0038] Example 2

[0039] The main difference between it and Example 1 is:

[0040] like Figure 5As shown, the heat conduction structure of the present invention adopts a plurality of heat conduction pipes 213 with a grooved design. These heat conduction pipes are evenly distributed in the S2 area of ​​the heat sink 21 and are fixedly installed by heat conductive resin, ensuring a stable connection and efficient heat transfer between the heat sink and the heat sink. It is worth noting that the location of the heat conduction pipe 213 is directly connected to the area where the capillary column 211 is located, which allows the phase change heat dissipation medium to flow freely between the two, thereby effectively conducting heat from the heat source to the heat sink and finally dissipating it to the environment.

[0041] The heat pipe 213 adopts a grooved design, which not only increases the heat conduction contact area, but also significantly improves the heat conduction efficiency and enhances the overall heat dissipation effect. Specifically, the grooved structure allows more phase change medium to contact the surface of the heat pipe, thereby promoting the rapid transfer of heat. In addition, this design also increases the heat conduction path length per unit volume, further optimizing the heat exchange process.

[0042] The above-mentioned ideal embodiments of the present invention are used as inspiration, but it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, modifications and alternatives without departing from the thought and spirit of the present invention. It should be understood that in the process of practicing the present invention, various alternatives to the embodiments of the present invention described herein may be adopted. The attached claims are intended to define the scope of protection of the present invention, and therefore cover the modular composition, equivalent or alternatives within the scope of protection of these claims.

Claims

1. An ironless linear motor with an integrated heat dissipation structure, characterized in that: Including: A stator (1) which adopts a double-stator (1) structure. The double-stator (1) is arranged horizontally and symmetrically. Inside the stator (1), a first magnet group (11) and a second magnet group (12) are symmetrically arranged. A rotor (2) is arranged between the first magnet group (11) and the second magnet group (12). The direction of the rotor (2) movement is defined as front and back. A rotor (2), which includes a horizontally arranged heat dissipation plate (21), coil windings (22) wound around both ends of the heat dissipation plate (21), and a fixed platform (23) fixedly installed in the middle of the heat dissipation plate (21). The heat dissipation plate (21) is of a hollow structure. In the middle area inside the heat dissipation plate (21), a number of capillary columns (211) are fixedly installed vertically. In the two side areas inside the heat dissipation plate (21), a heat conduction structure is arranged in the left-right direction. The inside of the heat dissipation plate (21) is filled with a phase change heat dissipation medium. At the position where the fixed platform (23) contacts the heat dissipation plate (21), a number of cooling channels (231) are opened. An installation hole (232) is also opened on the fixed platform (23). The fixed platform (23) is connected with a limiting mechanism through the installation hole (232). The limiting mechanism is used to limit the installation height and movement direction of the rotor (2).

2. The coreless linear motor with integrated heat dissipation structure according to claim 1, characterized in that: The stator (1) is of a "C" - shaped structure. The first magnet group (11) and the second magnet group (12) are respectively uniformly arranged at the top and bottom inside the stator (1).

3. The coreless linear motor with integrated heat dissipation structure according to claim 1, characterized in that: The coil windings (22) are located between the first magnet group (11) and the second magnet group (12) and maintain an equal linear distance from both of them.

4. The coreless linear motor with integrated heat dissipation structure according to claim 1, characterized in that: The magnets in the first magnet group (11) and the second magnet group (12) are all permanent magnets.

5. The coreless linear motor with integrated heat dissipation structure according to claim 1, characterized in that: The outside of the heat dissipation plate (21) is coated with an insulating and heat-conducting coating for isolating the coil windings (22).

6. The coreless linear motor with integrated heat dissipation structure according to claim 1, characterized in that: The heat conduction structure is a heat conduction groove (212).

7. The coreless linear motor with integrated heat dissipation structure according to claim 1, characterized in that: The heat conduction structure is a grooved heat conduction tube (213). The heat conduction tubes (213) are fixedly arranged through heat conduction resin. The heat conduction tubes (213) are directly communicated with the area where the capillary columns (211) are located.

8. The coreless linear motor with integrated heat dissipation structure according to claim 1, characterized in that: The limiting mechanism includes tracks arranged on both outer sides of the double-stator (1) structure. The tracks are horizontally arranged in the front-back direction. A support arm is slidably installed on the tracks. The support arm is fixedly connected with the stator (1) through the installation hole (232).

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