Radiation ring unit and planar motor rotor with same
By employing closely spaced radial ring units in a planar motor, the problem of magnetic flux leakage caused by gaps in the Hallbark array is solved, improving magnetic field density and thrust, enhancing the motor's operational stability and accuracy, and simplifying the installation process.
Patent Information
- Application Number
- CN202421859287.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-08-02
AI Technical Summary
In existing technologies, gaps exist in the Hallbark array formed by the mover magnet, leading to magnetic flux leakage, reduced magnetic field concentration, and affecting the thrust and accuracy of the motor.
The system employs closely spaced radiation ring units, including first and second radiation ring assemblies. Each assembly consists of an outer magnet and an inner magnet. The magnetic circuit direction follows the Hallbark array rule. The outer and inner magnets are integrally formed to avoid gaps, thereby improving magnetic field density and space utilization.
The increased magnetic field density improved the thrust and precision of the planar motor, reduced vibration and noise, increased the space utilization of the mover magnet, and simplified the installation process.
Smart Images
Figure CN223652124U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of planar motor technology, and in particular to a radial ring unit and a planar motor mover having the same. Background Technology
[0002] Planar motors utilize the principle of magnetic levitation to achieve contactless operation of the mover above the stator, thereby reducing friction and improving efficiency. Based on their working principle, planar motors can be divided into moving-magnet planar motors and moving-coil planar motors. In common moving-magnet planar motors, the mover magnet is one of the key components, and its design, performance, and optimization have a decisive impact on the overall efficiency, accuracy, and reliability of the motor.
[0003] The structural design of the mover magnet is crucial to the performance of planar motors. Common designs include single-sided and double-sided magnetic tracks, as well as Hall-Back arrays. In a Hall-Back array, magnets are arranged with specific polarities, generating a strong magnetic field on one side of the array and almost none on the other. Furthermore, the Hall-Back array can generate a near-sinusoidal magnetic field distribution. This near-sinusoidal magnetic field distribution is highly beneficial for the smooth torque output of motors and generators, reducing vibration and noise. Therefore, Hall-Back arrays are used in planar motors.
[0004] However, in existing Hallbark arrays formed by mover magnets, there are certain gaps between the mover magnets, such as... Figure 1 As shown, the presence of gaps can lead to magnetic flux leakage, reduced concentration of magnetic lines of force, and insufficient magnetic field density, which in turn affects the thrust and accuracy of the motor. Utility Model Content
[0005] To address the aforementioned technical problems, this application provides a radial ring unit and a planar motor mover having the same.
[0006] A first aspect of this application provides a radiation ring unit, comprising a first radiation ring assembly and a second radiation ring assembly arranged closely together. The first radiation ring assembly includes a first outer magnet and a first inner magnet disposed inside the first outer magnet. The second radiation ring assembly includes a second outer magnet and a second inner magnet disposed inside the second outer magnet. The magnetic circuit directions of the first radiation ring assembly and the second radiation ring assembly follow the Hallbark array rule.
[0007] In some embodiments of this application, the radiation ring unit includes a first radiation ring assembly and a second radiation ring assembly arranged closely together, and the cross-sectional outer contours of the first outer magnet, the second outer magnet, the first inner magnet, and the second inner magnet are triangular.
[0008] In some embodiments of this application, the magnetic circuit direction of the first inner magnet is vertically downward, the magnetic circuit direction of the second inner magnet is vertically upward, the magnetic circuit direction of the first outer magnet points towards the first inner magnet, and the magnetic circuit direction of the second outer magnet is away from the second inner magnet.
[0009] In some embodiments of this application, the cross-sectional outer contours of the first outer magnet and the second outer magnet are polygonal.
[0010] In some embodiments of this application, the outer contour of the cross section of the first inner magnet is adapted to the shape of the mounting groove of the first outer magnet; the outer contour of the cross section of the second inner magnet is adapted to the shape of the mounting groove of the second outer magnet.
[0011] In some embodiments of this application, the radiation ring unit includes a first radiation ring assembly and a plurality of second radiation ring assemblies arranged closely together. The plurality of second radiation ring assemblies are arranged closely together to form a second radiation ring assembly array, and the cross-sectional outer contour of the second radiation ring assembly array is adapted to the cross-sectional outer contour of the first radiation ring assembly.
[0012] In some embodiments of this application, the heights of the first outer magnet and the second outer magnet are the same as the heights of the first inner magnet and the second inner magnet.
[0013] In some embodiments of this application, the heights of the first outer magnet and the second outer magnet are higher than the heights of the first inner magnet and the second inner magnet.
[0014] A second aspect of this application provides a planar motor actuator comprising a plurality of radiating ring units arranged in a 360° annular configuration.
[0015] In some embodiments of this application, an upper housing and a lower housing are further included, with the radiation ring unit disposed between the upper housing and the lower housing; the upper housing and / or the lower housing are provided with positioning blocks adapted to the first inner magnet and the second inner magnet.
[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: The radiation ring unit of the present application includes a first radiation ring assembly and a second radiation ring assembly arranged closely together. The first radiation ring assembly includes a first outer magnet and a first inner magnet disposed inside the first outer magnet. The second radiation ring assembly includes a second outer magnet and a second inner magnet disposed inside the second outer magnet. In this way, there is no gap between the first radiation ring assembly and the second radiation ring assembly, which can prevent magnetic flux leakage, increase the concentration of magnetic lines of force, thereby increasing the magnetic field density, increasing the thrust of the planar motor, and improving the accuracy of the planar motor. At the same time, it improves the space utilization of the mover magnet. More radiation ring units can be arranged in the same area of the mover, thereby further increasing the magnetic field density.
[0017] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this document. Attached Figure Description
[0018] The accompanying drawings, which form part of this document, are used to provide a further understanding of the document. The illustrative embodiments and descriptions herein are used to explain the document and do not constitute an undue limitation thereof. In the drawings:
[0019] Figure 1 This is a prior art moving magnet array method provided by an exemplary embodiment of this application;
[0020] Figure 2 This is a schematic diagram of the structure of a radiation ring unit provided in an exemplary embodiment of this application;
[0021] Figure 3 This is a non-sinusoidal magnetic field waveform provided in an exemplary embodiment of this application;
[0022] Figure 4 It is a composite magnetic field waveform of a sinusoidal waveform provided in an exemplary embodiment of this application;
[0023] Figure 5 This is a top view of the planar motor mover provided in the first exemplary embodiment of this application;
[0024] Figure 6 This is a top view of another planar motor mover provided in the first exemplary embodiment of this application;
[0025] Figure 7 This is a top view of the planar motor mover provided in the second exemplary embodiment of this application;
[0026] Figure 8 This is a top view of another planar motor mover provided in the second exemplary embodiment of this application;
[0027] Figure 9This is a top view of the planar motor mover provided in the third exemplary embodiment of this application;
[0028] Figure 10 This is a top view of the planar motor actuator provided in the fourth exemplary embodiment of this application.
[0029] In the picture:
[0030] 101. First radiation ring assembly; 1011. First outer magnet; 1012. First inner magnet; 102. Second radiation ring assembly; 1021. Second outer magnet; 1022. Second inner magnet. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.
[0032] Planar motors utilize the principle of magnetic levitation to achieve contactless operation of the mover above the stator, thereby reducing friction and improving efficiency. The structural design of the mover magnet is crucial to the performance of the planar motor. Common designs include single-sided and double-sided magnetic tracks, as well as Hall-Back arrays. In a Hall-Back array, the magnets are arranged with specific polarities, generating a strong magnetic field on one side of the array and almost no magnetic field on the other. Furthermore, the Hall-Back array can generate a near-sinusoidal magnetic field distribution. This near-sinusoidal magnetic field distribution is highly beneficial for the smooth torque output of motors and generators, reducing vibration and noise. Therefore, Hall-Back arrays have been applied in planar motors.
[0033] However, in existing Hallbark arrays formed by mover magnets, there are certain gaps between the mover magnets, such as... Figure 1 As shown, the presence of gaps can lead to magnetic flux leakage, reduced concentration of magnetic lines of force, and insufficient magnetic field density, which in turn affects the thrust and accuracy of the motor.
[0034] Based on this, an exemplary embodiment of this application provides a radiation ring unit, which includes a first radiation ring assembly and a second radiation ring assembly arranged closely together. The first radiation ring assembly includes a first outer magnet and a first inner magnet disposed inside the first outer magnet. The second radiation ring assembly includes a second outer magnet and a second inner magnet disposed inside the second outer magnet. In this way, there is no gap between the first radiation ring assembly and the second radiation ring assembly, which can prevent magnetic flux leakage, increase the concentration of magnetic field lines, thereby increasing the magnetic field density, increasing the thrust of the planar motor, and improving the accuracy of the planar motor. At the same time, it improves the space utilization of the mover magnet. More radiation ring units can be arranged in the same area of the mover, thereby further increasing the magnetic field density.
[0035] Example 1:
[0036] An exemplary embodiment of this application provides a radiation ring unit, such as Figure 2 As shown, the radiation ring unit includes a first radiation ring assembly 101 and a second radiation ring assembly 102 arranged closely together. There is no gap between the first radiation ring assembly 101 and the second radiation ring assembly 102, which can prevent magnetic flux leakage, increase the concentration of magnetic field lines, thereby increasing the magnetic field density, increasing the thrust of the planar motor, and improving the accuracy of the planar motor. At the same time, it improves the space utilization of the mover magnet. More radiation ring units can be arranged in the same area of the mover, thereby further increasing the magnetic field density.
[0037] Continue to refer to Figure 2 The first radiation ring assembly 101 includes a first outer magnet 1011 and a first inner magnet 1012 disposed inside the first outer magnet 1011. The second radiation ring assembly 102 includes a second outer magnet 1021 and a second inner magnet 1022 disposed inside the second outer magnet 1021. The magnetic circuit directions of the first radiation ring assembly 101 and the second radiation ring assembly 102 follow the Hallbark array rule. Thus, the first radiation ring assembly 101 and the second radiation ring assembly 102, arranged according to the Hallbark array rule, can generate an enhanced magnetic field on one side, increasing the magnetic field density. Simultaneously, by replacing the original multiple magnets with a single-piece first outer magnet 1011 and second outer magnet 1021, the installation difficulty and process of installing the mover magnet can be greatly reduced.
[0038] When the magnet array follows the order as follows Figure 1 When the Hallbark array shown is arranged, the external multiple magnets are designed separately, which will result in an uneven magnetic field distribution. Especially in the gaps where no magnets are installed, the magnetic field distribution will be uneven and the magnetic field density will be greatly reduced, thus affecting the operating stability of the motor.
[0039] Ideally, on the magnetic field enhancement side of the Holbach array, the magnetic field strength varies with position in an approximately sinusoidal waveform, such as... Figure 4 As shown. However, in practical applications, the magnetic field waveform of the Hallbark array often exhibits multiple bulges at the peaks and troughs due to the presence of harmonic components and other factors, such as... Figure 3 As shown, this results in a non-complete sine wave in the magnetic field waveform, leading to thrust fluctuations, vibrations, and affecting the stability and accuracy of the planar motor during operation. In existing Hallbark magnet arrays, if the external magnets are composed of multiple magnets, the need for separate magnetization of each magnet and the joints between them both contribute to uneven magnetic field distribution, which is a significant factor causing the magnetic field waveform to be non-complete sine wave.
[0040] In this application, the first outer magnet 1011 and the second outer magnet 1021 are integrally formed without splicing gaps, thus avoiding uneven magnetic field distribution at the seams. At the same time, the integral first outer magnet 1011 and the second outer magnet 1021 can be directly magnetized without multiple magnetizations, resulting in a more uniform magnetic field distribution, reducing the impact on the magnetic field waveform, making the magnetic field waveform closer to a sine wave, thereby reducing thrust fluctuations, reducing vibration, and improving the stability and accuracy of the planar motor during operation.
[0041] The cross-sectional outer contours of the first outer magnet 1011 and the second outer magnet 1021 can be selected in various ways, as long as it ensures that the first outer magnet 1011 and the second outer magnet 1021 can be arranged closely without gaps to form a radial ring unit array. Therefore, the cross-sectional outer contours of the first outer magnet 1011 and the second outer magnet 1021 can be polygonal, such as triangular, quadrilateral, hexagonal, etc.
[0042] For example, such as Figure 2 and 5 As shown, both the first outer magnet 1011 and the second outer magnet 1021 are triangular prisms with a triangular outer profile. Preferably, the outer profiles of the first outer magnet 1011 and the second outer magnet 1021 have the same shape and size, and a triangular mounting groove is provided inside. The first inner magnet 1012 and the second inner magnet 1022 are also triangular prisms with a triangular outer profile, and their dimensions are matched to the dimensions of the mounting groove, ensuring that the outer wall of the first inner magnet 1012 is tightly fitted to the inner wall of the first outer magnet 1011, and the outer wall of the second inner magnet 1022 is tightly fitted to the inner wall of the second outer magnet 1021. Preferably, the outer profiles of the first inner magnet 1012 and the second inner magnet 1022 have the same shape and size. Figure 6As shown, the cross-sectional shape of the mounting groove can also be any shape such as circular or quadrilateral. In this case, the outer contour of the cross-section of the first inner magnet 1012 and the second inner magnet 1022 matches the cross-sectional shape of the mounting groove. Since the first inner magnet 1012 is installed inside the first outer magnet 1011 and the second inner magnet 1022 is installed inside the second outer magnet 1021, the situation where the moving magnet is repelled from its original installation position during installation is avoided.
[0043] The magnetic circuit direction of the radiating ring unit follows the Hallbark array rule. For example, when the magnetic circuit direction of the first inner magnet 1012 is vertically downward, the magnetic circuit directions of all enclosing surfaces of the first outer magnet 1011 point towards the first inner magnet 1012. Simultaneously, the magnetic circuit direction of the second inner magnet 1022 is vertically upward, and the magnetic circuit directions of all enclosing surfaces of the second outer magnet 1021 are away from the second inner magnet 1022. This magnetic circuit direction is the direction pointing towards the S pole.
[0044] Example 2:
[0045] In this embodiment, as Figure 7 and 8 As shown, both the first outer magnet 1011 and the second outer magnet 1021 are quadrangular prisms with a quadrilateral outer profile. For example, they can be square, rectangular, trapezoidal, or parallelogram. The interior is provided with mounting grooves of any shape, such as circular, triangular, quadrilateral, or hexagonal. The cross-sectional shape and size of the first inner magnet 1012 and the second inner magnet 1022 are adapted to the cross-sectional shape of the mounting groove. The cross-sectional shapes of the first inner magnet 1012 and the second inner magnet 1022 can be the same or different.
[0046] Example 3:
[0047] In this embodiment, as Figure 9 As shown, both the first outer magnet 1011 and the second outer magnet 1021 are hexagonal prisms with a hexagonal outer profile and an internal mounting groove with an arbitrary cross-sectional shape such as a circle, triangle, quadrilateral, or hexagon. The cross-sectional shape and size of the first inner magnet 1012 and the second inner magnet 1022 are adapted to the cross-sectional shape of the mounting groove. The cross-sectional shapes of the first inner magnet 1012 and the second inner magnet 1022 can be the same or different.
[0048] Example 4:
[0049] In practical applications, the magnetic field waveform of a Hallbark array often contains a series of harmonic components, which affect the purity and uniformity of the magnetic field. The magnetic field waveform generated by a Hallbark array can be decomposed into a Fourier series, which contains a fundamental wave and a series of higher harmonics. The fundamental wave is the lowest frequency and largest amplitude sine wave component, while the higher harmonics have higher frequencies and smaller amplitudes. These harmonic components have a significant impact on the magnetic field characteristics of the Hallbark array. For example, harmonic components in the magnetic field can lead to thrust non-uniformity, i.e., thrust fluctuations, which may generate vibration and noise during the operation of a planar motor, affecting the smooth operation and positioning accuracy of the planar motor. Harmonic components can also lead to additional energy losses, including eddy current losses and hysteresis losses, thereby reducing the efficiency of the planar motor. Harmonic components also increase the complexity of motor control because they can interact with other parameters of the motor, affecting the accuracy and response speed of the control algorithm.
[0050] In this embodiment, as Figure 10 As shown, the radiation ring unit includes a closely arranged first radiation ring assembly 101 and multiple second radiation ring assemblies 102. The multiple second radiation ring assemblies 102 are closely arranged to form a second radiation ring assembly array, and the magnetic circuit direction of the second radiation ring assembly array also follows the Hallbark array rule. The cross-sectional outer contour of the second radiation ring assembly array is adapted to the cross-sectional outer contour of the first radiation ring assembly 101. Preferably, the cross-sectional outer contour of the second radiation ring assembly array has the same shape and size as the cross-sectional outer contour of the first radiation ring assembly 101. In this embodiment, the first radiation ring assembly 101 can provide a larger magnetic field, and each second radiation ring assembly 102 can provide a relatively smaller magnetic field. Multiple second radiation ring assemblies 102 and the first radiation ring assembly 101 can provide magnetic fields of superimposed magnitudes, combining to form a composite magnetic field, forming a sinusoidal magnetic field strength, offsetting the adverse effects of harmonic components, and ultimately forming a sinusoidal magnetic field waveform, such as... Figure 4 As shown, the sinusoidal magnetic field waveform formed can effectively reduce the thrust fluctuation of the planar motor and improve the running stability and running accuracy of the planar motor.
[0051] For example, the radiation ring unit may include nine second radiation ring assemblies 102, which are closely arranged together and simultaneously closely arranged with the first radiation ring assembly 101. The number of second radiation ring assemblies 102 can be adjusted according to the strength of the magnetic field, magnetic flux density, etc. The outer contour of the first outer magnet 1011 of the first radiation ring assembly 101 is triangular, and its interior is provided with a mounting groove with a cross-sectional shape of triangle, circle, quadrilateral, pentagon, or hexagon, etc. The cross-sectional shape of the first inner magnet 1012 is adapted to the cross-sectional shape of the mounting groove, and the first inner magnet 1012 is installed inside the first outer magnet 1011.
[0052] The outer cross-sectional contour of the second outer magnet 1021 of the second radiation ring assembly 102 is triangular, and its interior is provided with a mounting groove with a cross-sectional shape of triangle, circle, quadrilateral, pentagon, or hexagon. The cross-sectional shape of the second inner magnet 1022 is adapted to the cross-sectional shape of the mounting groove, and the second inner magnet 1022 is installed inside the second outer magnet 1021. In this embodiment, the outer cross-sectional contours of the first outer magnet 1011 and the second outer magnet 1021 can be triangular, quadrilateral, or hexagonal. The outer cross-sectional contour of the first inner magnet 1012 is adapted to the shape of the mounting groove of the first outer magnet 1011, and the outer cross-sectional contour of the second inner magnet 1022 is adapted to the shape of the mounting groove of the second outer magnet 1021.
[0053] Example 5:
[0054] A planar motor mover is provided, comprising multiple radiating ring units arranged in a tightly packed 360° annular configuration. This means the sidewalls of the radiating ring units are closely aligned, forming a gapless arrangement. Simultaneously, the multiple radiating ring units share a common center point, forming a gapless annular loop. This ensures the integrity and continuity of the mover structure, prevents magnetic flux leakage, increases the concentration of magnetic lines of force, improves magnetic field density, and enhances the space utilization of the mover magnet. This effectively strengthens the magnetic field strength, thereby increasing the thrust of the planar motor and enabling it to carry and transport large-mass objects.
[0055] The planar motor mover also includes an upper housing and a lower housing, with a radiating ring unit disposed between the upper and lower housings, together forming the mover of the planar motor. The upper and lower housings are provided with slots for mounting the radiating ring unit. When installing the mover magnet, the radiating ring unit can be fixed in the slots, reducing installation difficulty and saving installation time.
[0056] The heights of the first outer magnet 1011 and the second outer magnet 1021 are the same as the heights of the first inner magnet 1012 and the second inner magnet 1022. At this time, the radiation ring unit has a large magnetic flux.
[0057] The heights of the first outer magnet 1011 and the second outer magnet 1021 can also be higher than the heights of the first inner magnet 1012 and the second inner magnet 1022, such as... Figure 2As shown. At this time, positioning blocks can be provided on both the upper and lower shells, or on either the upper or lower shell. The position and size of the positioning blocks are adapted to the position and size of the first inner magnet 1012 and the second inner magnet 1022. During the installation of the moving magnet, the first outer magnet 1011 and the second outer magnet 1021 can be snapped onto the positioning blocks, and then the first inner magnet 1012 and the second inner magnet 1022 can be installed inside the first outer magnet 1011 and the second outer magnet 1021. On the one hand, the positioning blocks not only position the first outer magnet 1011 and the second outer magnet 1021, but also position the first inner magnet 1012 and the second inner magnet 1022, improving installation convenience, reducing positioning and installation difficulties, saving installation time, and improving installation efficiency.
[0058] On the other hand, the manufacturing difficulty of the upper and lower shells has been reduced, in situations such as Figure 1 In the illustrated magnet array, mounting slots need to be provided for each magnet in the upper and lower housings, and connection holes for the upper and lower housings need to be provided in the remaining spaces. This involves many manufacturing and processing steps, greatly increasing the difficulty of manufacturing and processing. However, in the upper and lower housings of this application, positioning blocks arranged in a preset size array can be provided in the upper and lower housings to achieve the positioning of the first outer magnet 1011, the first inner magnet 1012, the second outer magnet 1021, and the second inner magnet 1022, which greatly reduces the manufacturing and processing steps and difficulty of the upper and lower housings.
[0059] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.
[0060] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.
[0061] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, the intent of this application also includes these modifications and variations.
Claims
1. A radiating ring unit, characterized in that, The first radiation ring assembly includes a first radiation ring assembly and a second radiation ring assembly arranged closely together. The first radiation ring assembly includes a first outer magnet and a first inner magnet disposed inside the first outer magnet. The second radiation ring assembly includes a second outer magnet and a second inner magnet disposed inside the second outer magnet. The magnetic circuit directions of the first radiation ring assembly and the second radiation ring assembly follow the Hallbark array rule. The magnetic path of the first inner magnet is vertically downward, the magnetic path of the second inner magnet is vertically upward, the magnetic path of the first outer magnet points towards the first inner magnet, and the magnetic path of the second outer magnet is away from the second inner magnet.
2. The radiation ring unit according to claim 1, characterized in that, The radiation ring unit includes a first radiation ring assembly and a second radiation ring assembly arranged closely together, and the cross-sectional outer contours of the first outer magnet, the second outer magnet, the first inner magnet, and the second inner magnet are triangular.
3. The radiation ring unit according to claim 1, characterized in that, The cross-sectional outer contours of the first and second outer magnets are polygonal.
4. The radiation ring unit according to claim 1, characterized in that, The outer contour of the cross section of the first inner magnet is adapted to the shape of the mounting groove of the first outer magnet; the outer contour of the cross section of the second inner magnet is adapted to the shape of the mounting groove of the second outer magnet.
5. The radiation ring unit according to claim 1, characterized in that, The radiation ring unit includes a first radiation ring assembly and a plurality of second radiation ring assemblies arranged closely together. The plurality of second radiation ring assemblies are arranged closely together to form a second radiation ring assembly array. The cross-sectional outer contour of the second radiation ring assembly array is adapted to the cross-sectional outer contour of the first radiation ring assembly.
6. The radiation ring unit according to claim 1, characterized in that, The heights of the first outer magnet and the second outer magnet are the same as the heights of the first inner magnet and the second inner magnet.
7. The radiation ring unit according to claim 1, characterized in that, The heights of the first outer magnet and the second outer magnet are higher than the heights of the first inner magnet and the second inner magnet.
8. A planar motor actuator, characterized in that, It includes a plurality of radiating ring units arranged in a circumferential configuration as described in any one of claims 1 to 7, wherein the plurality of radiating ring units form a closely spaced 360° annular arrangement.
9. The planar motor mover according to claim 8, characterized in that, It also includes an upper housing and a lower housing, with the radiation ring unit disposed between the upper housing and the lower housing; the upper housing and / or the lower housing are provided with positioning blocks adapted to the first inner magnet and the second inner magnet.