Coil for planar motor, coil assembly and planar motor

Abstract

The utility model provides a coil for a planar motor, a coil assembly and a planar motor, the coil comprises a first end and a second end, a wire between the first end and the second end spirally extends along a preset center line at a fixed screw pitch, and the inner diameter of each circle of wire is kept consistent; therefore, the coil has good consistency and uniform inductance and resistance distribution; a containing channel penetrating through the wire is arranged in the wire in the axis direction of the wire. Therefore, flowing cooling liquid can be arranged in the accommodating channel or insulating materials with good thermal conductivity can be filled in the accommodating channel, heat generated in the working process of the coil can be effectively taken away, the working temperature of the coil is reduced, performance reduction and material aging caused by overheating are prevented, and the service life of the motor is prolonged; the efficiency and the output power of the motor can be improved through the combined action of uniform inductance and resistance distribution and an efficient heat dissipation mechanism, so that the motor can still keep stable performance under the conditions of high load and long-time operation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of planar motors, and in particular to a coil for a planar motor, a coil assembly and a planar motor. BACKGROUND

[0002] A planar motor is an electric motor that uses magnetic levitation principles to achieve contactless operation of a mover above a stator. The main working principle is that a coil generates a magnetic field when powered, which interacts with a magnet to generate a thrust or a pulling force, thereby driving the mover of the planar motor to move in a plane.

[0003] When the planar motor is in operation, the coil generates heat when powered. If this heat cannot be dissipated in time, the temperature of the coil will be too high; high temperature will reduce the electrical conductivity of the coil, increase the resistance, and thus reduce the efficiency and output power of the motor; at the same time, long-term high temperature will cause aging and damage of the coil material, shorten the service life of the motor. CONTENT OF THE INVENTION

[0004] In order to solve the above technical problems, the application provides a coil for a planar motor, a coil assembly and a planar motor.

[0005] In a first aspect of the application, a coil for a planar motor is provided, comprising a first end and a second end, the conductive wire between the first end and the second end extends along a predetermined center line with a fixed pitch, and the inner diameter of each coil of the conductive wire remains consistent; and a containing channel is arranged in the conductive wire along the axial direction of the conductive wire.

[0006] In some embodiments of the application, the coil is made by 3D printing, and the material of the coil can be copper or a metal alloy.

[0007] In some embodiments of the application, the first end and the second end of the coil are respectively connected with a connecting pipe for connecting a cooling liquid circulation system, and the containing channel is a cooling liquid flow channel.

[0008] In some embodiments of the application, the containing channel is filled with a heat-dissipating insulating material.

[0009] In some embodiments of the application, the heat-dissipating insulating material can be any one of ceramic, epoxy resin, polyimide, graphite, silicon carbide and carbon fiber.

[0010] In some embodiments of the application, the containing channel is a plurality of containing channels; the containing channels include a first containing channel extending along the center line of the conductive wire and four second containing channels uniformly arranged around the first containing channel.

[0011] In some embodiments of the application, the cross-sectional shape of the containing channel can be circular, elliptical, triangular or polygonal.

[0012] In some embodiments of the present application, the conductor wire is further coated with an insulating layer.

[0013] In a second aspect of the present application, a coil assembly for a planar motor is provided, comprising the coil for a planar motor and the cooling liquid circulation system as described above, the first end and the second end of the conductor wire are respectively connected with the cooling liquid circulation system through the connecting pipes, so that the cooling liquid flows through the accommodation channel to cool the coil.

[0014] In a third aspect of the present application, a planar motor is provided, comprising the coil for a planar motor or the coil assembly for a planar motor as described above.

[0015] Compared with the prior art, the planar motor coil of the present application has the following advantages and beneficial effects: the planar motor coil of the present application comprises a first end and a second end, the conductor wire between the first end and the second end extends along a preset center line at a fixed pitch, and the inner diameter of each coil of the conductor wire remains consistent; in this way, the coil has good consistency, and the inductance and resistance are uniformly distributed; inside the conductor wire, an accommodation channel penetrating through the conductor wire is arranged along the axial direction of the conductor wire; in this way, the flowing cooling liquid or the insulating material with good thermal conductivity can be arranged in the accommodation channel, which can effectively take away the heat generated during the operation of the coil, reduce the operating temperature of the coil, prevent performance degradation and material aging caused by overheating, and thus prolong the service life of the motor; the uniform inductance and resistance distribution and the efficient heat dissipation mechanism jointly act to improve the efficiency and output power of the motor, so that the motor can still maintain stable performance under high load and long time operation conditions.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of the present application, are used to provide a further understanding of the present application, and the illustrative embodiments thereof and their descriptions are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0018] Figure 1 is a structural schematic view of a coil assembly for a planar motor provided by an exemplary embodiment of the present application;

[0019] Figure 2 is a front view of a coil assembly for a planar motor provided by an exemplary embodiment of the present application;

[0020] Figure 3 is Figure 2 is a sectional view at A-A in FIG. 4;

[0021] Figure 4 is a sectional view of a coil for a planar motor provided by an exemplary embodiment of the present application;

[0022] Figure 5 is a cross-sectional view of a coil for a planar motor provided by an example embodiment of the present application;

[0023] Figure 6 is a cross-sectional view of a coil for a planar motor provided by an example embodiment of the present application;

[0024] Figure 7 is a cross-sectional view of a coil for a planar motor provided by an example embodiment of the present application;

[0025] Figure 8 is a cross-sectional view of a coil for a planar motor provided by an example embodiment of the present application.

[0026] in the figure:

[0027] 100, wire; 101, accommodation channel; 200, connecting pipe. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other at will.

[0029] A planar motor is an electric motor that realizes non-contact operation of a mover above a stator by using magnetic suspension principle. The main working principle is that a coil is energized to generate a magnetic field, which interacts with a magnet to generate a thrust or a pulling force, thereby driving the mover of the planar motor to move in a plane.

[0030] When the planar motor is running, the coil is energized to generate heat. If the heat cannot be dissipated in time, the temperature of the coil will be too high. High temperature will reduce the conductive performance of the coil, increase the resistance, and thus reduce the efficiency and output power of the motor. At the same time, long-term high temperature will cause aging and damage of the coil material, and shorten the service life of the motor.

[0031] Based on this, an exemplary embodiment of this application provides a coil for a planar motor. The coil includes a first end and a second end, and a wire between the first end and the second end extends spirally along a preset center line with a fixed pitch, with the inner diameter of each turn of the wire remaining consistent. Thus, the coil has good consistency, and the inductance and resistance are evenly distributed. Inside the wire, along the axial direction of the wire, a receiving channel is provided that penetrates the wire. Thus, a flowing coolant or a thermally conductive insulating material can be placed in the receiving channel, which can effectively remove the heat generated during the operation of the coil, reduce the operating temperature of the coil, prevent performance degradation and material aging due to overheating, and thus extend the service life of the motor. The uniform inductance and resistance distribution and the efficient heat dissipation mechanism work together to improve the efficiency and output power of the motor, enabling the motor to maintain stable performance under high load and long-term operation conditions.

[0032] Example 1:

[0033] An exemplary embodiment of this application provides a coil for a planar motor, such as... Figures 1 to 3 As shown, the coil includes a first end and a second end. The conductor 100 between the first end and the second end extends spirally along a preset center line with a fixed pitch. The distance between two adjacent turns of conductor 100 is the same, and the inner diameter of each turn of conductor 100 is consistent, so that the coil has good consistency and uniform inductance and resistance distribution. Inside the conductor 100, along the axial direction of the conductor 100, there is a receiving channel 101 that passes through the conductor 100. In this way, a flowing coolant or a thermally conductive insulating material can be placed in the receiving channel 101, which can effectively remove the heat generated during the operation of the coil, reduce the operating temperature of the coil, prevent performance degradation and material aging caused by overheating, and thus extend the service life of the motor. The uniform inductance and resistance distribution and the efficient heat dissipation mechanism work together to improve the efficiency and output power of the motor, so that the motor can maintain stable performance under high load and long-term operation conditions.

[0034] In existing technologies, coils are typically formed by winding a single wire around an object of a certain diameter. However, this traditional winding method has the following problems: First, inconsistent wire spacing: During the winding process, the wire spacing between each turn of the coil is often uneven, resulting in low overall accuracy and consistency of the coil; Second, uneven resistance and inductance: Due to the inconsistent wire spacing, the resistance and inductance of the coil are also unevenly distributed, which affects the performance and efficiency of the motor.

[0035] In order to ensure that the distance between the two adjacent turns of the wire 100 is the same, the coil can be made by 3D printing. The 3D printing technology can accurately control the wire spacing between each turn of the coil, ensure the consistency of the geometric structure of the coil, ensure the uniform distribution of the inductance and resistance of the coil, and improve the electrical performance of the coil; when the coil array is mass-produced, the consistency of each coil can be ensured, and the error between the wire spacing generated in the winding process can be avoided.

[0036] The material of the coil can be a conventional material, for example, copper or a metal alloy, for example, a copper alloy, a nickel alloy, a titanium alloy, a high-temperature alloy, etc.

[0037] Embodiment 2:

[0038] Based on the above-mentioned embodiment 1, as shown in Figure 1 The first end and the second end of the coil are respectively connected with the connecting pipe 200 for connecting the cooling liquid circulating system. The connecting pipe 200 can be fixed on the first end and the second end of the coil, or can be integrally formed with the coil and made by 3D printing together. The accommodation channel 101 is a cooling liquid flow channel, so that there is a cooling liquid flow channel in each turn of the coil. By setting the cooling liquid circulating system, the cooling liquid flows in the accommodation channel 101 to take away the heat generated by the coil, reduce the temperature of the coil, and improve the performance of the motor. The cooling liquid can be a common water-based cooling liquid, an organic cooling liquid, an oil-based cooling liquid, etc.

[0039] Embodiment 3:

[0040] Based on the above-mentioned embodiment 1, the accommodation channel 101 in this embodiment can be filled with heat-dissipating insulating material. The heat-dissipating insulating material can be any one of ceramic, epoxy resin, polyimide, graphite, silicon carbide, carbon fiber, etc. The two ends of the heat-dissipating insulating material filled in the accommodation channel 101 can be connected to the heat-conducting sheet, so as to timely discharge the heat generated inside the coil to the outside of the coil, so as to timely cool the coil.

[0041] Embodiment 4:

[0042] According to the difference of the 3D printing head or nozzle, the accommodation channel 101 of different sizes or shapes can be set. The accommodation channel 101 can be multiple, for example, as shown in Figure 4 The accommodation channel 101 includes a first accommodation channel extending along the center line of the wire 100 and four second accommodation channels uniformly arranged around the first accommodation channel. The cross-sectional shape of the accommodation channel 101 can be circular or elliptical or triangular or polygonal. As shown in Figure 4 and 5 The cross-sectional shape of the accommodation channel 101 is circular; as shown in Figure 6 The cross-sectional shape of the accommodation channel 101 is elliptical; as shown in Figure 7As shown, the cross-sectional shape of the accommodation channel 101 is a triangle; as Figure 8 As shown, the cross-sectional shape of the accommodation channel 101 is a polygon.

[0043] In the above-mentioned embodiments 1 to 4, the wire 100 can be further coated with an insulating layer. The insulating layer can be printed together with the coil when the 3D printed coil is performed, which provides electrical insulation for the coil and protects the wire 100 from physical damage and environmental influences.

[0044] Embodiment 5:

[0045] The embodiment provides a coil assembly for a planar motor, which includes a coil and a cooling liquid circulation system, and the first end and the second end of the wire 100 are respectively communicated with the cooling liquid circulation system through the connecting pipe 200; the cooling liquid circulation system can include a heat exchanger, a pump, a valve, and is communicated with a plurality of wires 100 through the connecting pipe 200, and the plurality of wires 100 can be in parallel or in series. Since the accommodation channel 101 penetrates the wire 100 along the axial direction of the wire 100, the cooling liquid can flow through the accommodation channel 101 to cool the coil.

[0046] Embodiment 6:

[0047] The embodiment provides a planar motor, which includes the coil for a planar motor in any one of the above-mentioned embodiments 1 to 4 or the coil assembly for a planar motor in the embodiment 5. The coil of the motor has good consistency, uniform distribution of resistance and inductance, and can effectively improve the performance of the motor; at the same time, the coil of the motor has good heat dissipation performance, which can effectively reduce the working temperature of the coil during the working process of the motor, prevent performance degradation and material aging caused by overheating, thereby prolonging the service life of the motor and enabling the motor to maintain stable performance under high load and long time operation conditions.

[0048] In this application, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that a composition or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such composition or device. Without more limitations, the elements defined by the statement "comprising" do not exclude the presence of additional identical elements in the composition or device including the elements.

[0049] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0050] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A coil for a planar motor, characterized in that, It includes a first end and a second end, and a wire between the first end and the second end extends spirally along a preset center line with a fixed pitch, and the inner diameter of each turn of the wire remains consistent; inside the wire, along the axial direction of the wire, there is a receiving channel that passes through the wire. The accommodating channel is multiple; the accommodating channel includes a first accommodating channel extending along the center line of the conductor and four second accommodating channels evenly arranged around the first accommodating channel; The accommodating channel is a coolant flow channel, and a coolant flow channel is formed in each coil. The first end and the second end are respectively connected to the coolant circulation system, so that the coolant flows in the accommodating channel to carry away the heat generated by the coil. Alternatively, the accommodating channel is filled with a heat-dissipating insulating material, and both ends of the heat-dissipating insulating material are connected to a heat-conducting sheet to conduct heat from inside the coil to the outside to achieve cooling.

2. The coil for a planar motor according to claim 1, characterized in that, The coil is manufactured by 3D printing, and the material of the coil can be copper or a metal alloy.

3. The coil for a planar motor according to claim 1, characterized in that, The first and second ends of the coil are respectively connected to connecting pipes for connecting to the coolant circulation system, and the accommodating channel is a coolant flow channel.

4. The coil for a planar motor according to claim 1, characterized in that, The heat dissipation and insulation material can be any one of ceramics, epoxy resin, polyimide, graphite, silicon carbide, and carbon fiber.

5. The coil for a planar motor according to claim 1, characterized in that, The cross-sectional shape of the accommodating channel can be circular, elliptical, triangular, or polygonal.

6. The coil for a planar motor according to claim 1, characterized in that, The conductor is also covered with an insulating layer.

7. A coil assembly for a planar motor, characterized in that, Includes a coil and coolant circulation system for a planar motor as described in any one of claims 1 to 6, wherein the first end and the second end of the conductor are respectively connected to the coolant circulation system through connecting pipes, so that the coolant flows through the receiving channel to cool the coil.

8. A planar motor, characterized in that, Includes a planar motor coil as described in any one of claims 1 to 6 or a planar motor coil assembly as described in claim 7.

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