Composite superposed magnet structure and planar motor

Abstract

The utility model relates to the technical field of planar motors, in particular to a composite superposed magnet structure, which is characterized in that superposed layer magnets are arranged above base layer magnets, that is, superposed magnets are correspondingly superposed above a plurality of base magnets, and a synergistic enhanced magnetic field is formed above the base layer magnets, so that the magnetic field intensity is effectively improved; a magnetic field with high strength and strong directionality is formed on the surface of the planar motor, and high power density and accurate control in the operation process of the planar motor are realized. Particularly, a composite stacking mode is adopted, namely, different stacking magnets are stacked on a first magnet and a second magnet in the base layer magnets respectively, the stacking magnets stacked above the first magnet are the same as the first magnet, and a plurality of small magnets (n * n) of the number of the magnets on the upper layer are stacked in each stacking layer magnet above the second magnet; therefore, the formed composite laminated layer magnet is matched with the base layer magnet to form a magnetic field with a better magnetic intensity improving effect. The utility model also provides a planar motor comprising the magnet structure.

Description

Technical Field

[0001] The utility model relates to the technical field of planar motors, and in particular to a composite superimposed magnet structure and a planar motor. Background Art

[0002] In the prior art, the electromagnetic thrust of a permanent magnet synchronous planar motor is the result of the interaction between the magnetic field generated by the permanent magnet array and the current in the coil array, wherein the permanent magnet array becomes one of the key technologies for achieving efficient and precise control of the planar motor. Currently, in the precision manufacturing process, a higher magnetic field strength is usually required to achieve high power density and precise control of the planar motor; therefore, based on the above problems, the present application provides a composite superimposed magnet structure that can enhance the magnetic field strength. Utility Model Content

[0003] The purpose of the utility model is to provide a composite superimposed magnet structure and a planar motor to solve the prior art problems existing in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0005] On the one hand, the present application provides a composite superimposed magnet structure, including a base magnet and a superimposed layer magnet, the base magnet includes a plurality of base magnets, the superimposed layer magnet is arranged on the top of the base magnet and forms a magnetic field with unidirectionally enhanced magnetic field strength with the base magnet, the superimposed layer magnet includes a plurality of superimposed magnets and is arranged corresponding to the base magnet, and the superimposed layer magnet is provided with at least two layers.

[0006] Based on the above technical solution, the base magnet includes a first magnet and a second magnet, a plurality of the first magnets are provided, and the second magnet is provided at a center position of the plurality of first magnets.

[0007] Based on the above technical solution, the stacked layer magnets are provided with two layers, and the stacked magnets include a first stacked magnet and a second stacked magnet, the first stacked magnet is correspondingly arranged above the first magnet, and the second stacked magnet is correspondingly arranged above the second magnet.

[0008] Based on the above technical solution, in each layer of stacked magnets, the first stacked magnet stacked above the first magnet has the same shape and size as the first magnet, and the second stacked magnet stacked above the second magnet is an n*n small magnet array.

[0009] Based on the above technical solution, the number of small magnets in each stacked layer of magnets is (n*n) 上一层磁铁个数 .

[0010] Based on the above technical solution, n≥5.

[0011] Based on the above technical solution, in each layer of stacked magnets, the first stacked magnet stacked on the first magnet has the same shape and size as the first magnet, and the second stacked magnet stacked on the second magnet has the same shape and size as the second magnet.

[0012] Based on the above technical solution, the magnets in the base layer magnet and the superimposed layer magnet are both neodymium iron boron magnets.

[0013] On the other hand, the present application also provides a planar motor, comprising the above-mentioned composite superimposed magnet structure.

[0014] The beneficial effects of the technical solution provided by the utility model are:

[0015] The utility model provides a composite superimposed magnet structure, in which a superimposed layer magnet is arranged above a base magnet, that is, superimposed magnets are correspondingly superimposed above a plurality of base magnets, so as to form a synergistically enhanced magnetic field above the base magnets, effectively improve the magnetic field strength, and form a magnetic field with high strength and strong directionality on the surface of the planar motor, thereby achieving high power density and precise control during the operation of the planar motor.

[0016] In particular, a composite superposition form is adopted, that is, different superimposed magnets are superimposed on the first magnet and the second magnet in the base magnet, respectively, to form a composite superimposed magnet structure, which has an excellent magnetic strength enhancement effect. In the multi-layer superimposed layer magnet, the superimposed magnet superimposed on the first magnet has the same shape, size and magnetization direction as the first magnet 11; a plurality of small magnets are superimposed on the second magnet 12 located at the center of the first magnet, and the number of small magnets is n*n, that is, n*n small magnets are superimposed on each magnet, that is, the number of small magnets in each superimposed layer magnet corresponding to the second magnet 12 is n*n 上一层磁铁个数 The superimposed layer magnets formed in this way cooperate with the base layer magnets to form a magnetic field with a better magnetic strength enhancement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the base magnet in the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the first layer of superimposed magnets in the utility model;

[0019] Figure 3 It is a cross-sectional view of a base magnet in the utility model having a superimposed layer of magnets superimposed on the base magnet;

[0020] Figure 4 It is a cross-sectional view of the second magnet and the two superimposed magnets thereon in the utility model; wherein the arrows represent the magnetization directions of the magnets;

[0021] Figure 5 It is a schematic diagram of magnetic field strength in the utility model with only base magnets, simple superposition form and composite superposition form; DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] Example 1

[0026] like Figures 1 to 5 As shown, a composite superimposed magnet structure includes a base magnet 1 and a superimposed layer magnet 2, wherein the base magnet 1 includes a plurality of base magnets, the superimposed layer magnet 2 is arranged on the top of the base magnet 1 and forms a magnetic field with unidirectionally enhanced magnetic field strength with the base magnet 1, the superimposed layer magnet 2 includes a plurality of superimposed magnets and is arranged corresponding to the base magnet, and the superimposed layer magnet 2 is provided with at least two layers.

[0027] The utility model provides a composite superimposed magnet structure, in which a superimposed layer magnet 2 is arranged above a base magnet 1, that is, superimposed magnets are correspondingly superimposed above a plurality of base magnets, so as to form a synergistically enhanced magnetic field above the base magnet 1, effectively improve the magnetic field strength, and form a magnetic field with high strength and strong directionality on the surface of the planar motor, thereby achieving high power density and precise control during the operation of the planar motor.

[0028] Based on the above technical solution, the base magnet includes a first magnet 11 and a second magnet 12 , a plurality of the first magnets 11 are provided, and the second magnet 12 is provided at the center position of the plurality of first magnets 11 .

[0029] In a preferred embodiment, the second magnets 12 are evenly arranged in plurality, and the first magnets 11 are correspondingly arranged around the second magnets 12 to form a base magnet array; correspondingly, superimposed magnets are correspondingly arranged above the base magnets 1 to form a superimposed layer magnet array, which together form a composite magnet array. The size of the composite magnet array is selected according to different actual use conditions, and the application range is wider.

[0030] Based on the above technical solution, the stacked layer magnet 2 is provided with two layers, and the stacked magnet includes a first stacked magnet 21 and a second stacked magnet 22. The first stacked magnet 21 is correspondingly arranged above the first magnet 11, and the second stacked magnet 22 is correspondingly arranged above the second magnet 12.

[0031] Preferably, in this embodiment, at least two layers of superimposed magnets are arranged on the base magnet 1, that is, at least two layers of superimposed magnets are superimposed on the first magnet 11, and at least two layers of superimposed magnets are superimposed on the second magnet 12, which effectively improves the magnetic field strength. In addition, according to the actual use conditions, the superimposed magnets can also be provided with a third layer, a fourth layer, and up to the mth layer to form a composite superimposed magnet matrix, which can be stacked upward in sequence to adapt to the magnetic field strength and control requirements of different use scenarios or application equipment, and improve its applicability.

[0032] Specifically, Figure 1 As shown, a second magnet 12 is arranged in the base magnet 1, and the first magnets 11 are arranged in the surrounding directions of the second magnet 12, that is, the second magnet 12 is located at the center of the plurality of first magnets 11, and the plurality of first magnets 11 and second magnets 12 form the base magnet 1; the superimposed layer magnet 2 is arranged above the base magnet 1, and the first superimposed magnet 21 and the second superimposed magnet 22 are correspondingly superimposed above the first magnet 11 and the second magnet 12, and the plurality of first superimposed magnets 21 and the second superimposed magnets 22 form a layer of superimposed layer magnets.

[0033] Based on the above technical solution, in each layer of stacked magnets, the first stacked magnet 21 stacked above the first magnet 11 has the same shape and size as the first magnet 11, and the second stacked magnet 22 stacked above the second magnet 12 is an n*n small magnet array.

[0034] Preferably, the number of small magnets in each stacked layer of magnets is n*n 上一层磁铁个数 .

[0035] Preferably, the present embodiment adopts a composite superposition form, that is, different superimposed magnets are respectively superimposed on the first magnet 11 and the second magnet 12 in the base magnet to form a composite superimposed magnet structure, which has an excellent magnetic strength enhancement effect. In the multi-layer superimposed layer magnet, the superimposed magnet superimposed on the first magnet 11 has the same shape, size and magnetization direction as the first magnet 11; a plurality of small magnets are superimposed on the second magnet 12 located at the center of the first magnet 11, and the outer edge of the small magnet is aligned with the edge of the second magnet 12, and the number of small magnets is n*n, that is, n*n small magnets are superimposed on each magnet, that is, the number of magnets corresponding to each superimposed layer magnet above the second magnet 12 is a set of n*n magnets superimposed on each magnet of the previous layer, that is, the number of small magnets in each superimposed layer magnet is n*n 上一层磁铁个数 The superimposed layer magnets formed in this way cooperate with the base layer magnets to form a magnetic field with a better magnetic strength enhancement effect.

[0036] In one preferred embodiment, the stacked layer magnet 2 is provided with two layers, the first layer of the stacked layer magnet includes the first stacked magnet and the second stacked magnet, the second layer of the stacked layer magnet includes the third stacked magnet and the fourth stacked magnet, the first stacked magnet is correspondingly arranged on the first magnet, the second stacked magnet is correspondingly arranged on the second magnet, the third stacked magnet is correspondingly arranged on the first stacked magnet, and the fourth stacked magnet is correspondingly arranged on the second stacked magnet, so as to improve the magnetic field strength. Taking the composite stacking form as an example, the first stacked magnet, the third stacked magnet and the first magnet are all the same in shape and size, the second stacked magnet includes n*n small magnets arranged on the second magnet, and the fourth stacked magnet includes n*n small magnets arranged on each small magnet in the second stacked magnet.

[0037] It should also be noted that the number of layers of superimposed magnets to be superimposed is selected according to the actual working conditions. Taking the composite superposition form as an example, a corresponding number of superimposed magnets are superimposed on the first magnet and have the same shape and size as the first magnet, and a corresponding number of superimposed magnets are superimposed on the second magnet, and the number of superimposed magnets in each layer is n*n. 上一层磁铁个数 That is, n*n small magnets are stacked on each magnet in the upper layer, and the magnetic strength enhancement effect is better.

[0038] On the basis of the above technical solution, n≥5. The superimposed layer magnet can better ensure that the magnetic field strength under the combined array is greater than the magnetic field strength of the traditional original magnet. In this embodiment, a magnet matrix greater than 5*5 is selected, and the interaction causes the composite superimposed magnet structure to enhance the magnetic field strength in a specific direction of the magnet arrangement and combination. The small magnet combination can achieve a large magnetic field strength on one side and a small basic magnetic field strength on the other side, avoiding the weak magnetic surface from affecting the magnetic circuit between magnets. If the number of magnets is less than 5, the magnetic circuit design needs to be diversified, and the simple cube structure is changed to other composite structures to achieve the function of enhancing the magnetic field strength in a specific direction of the magnet arrangement and combination, while weakening the magnetic field on the other side. It is similar to the Halbach array, which is composed of a plurality of magnetic blocks with different magnetization directions assembled according to a rule to achieve a specific magnetic field distribution, enhance the magnetic field strength in a specific direction, and weaken the magnetic field on the other side, thereby generating an approximately ideal unilateral magnetic field. In a more preferred embodiment, the number of superimposed magnets can also be selected according to the actual magnetic field requirements, and the number of superimposed layers can also be selected.

[0039] On the basis of the above technical solution, the magnets in the base layer magnet 1 and the superimposed layer magnet 2 are both made of neodymium iron boron magnets.

[0040] Example 2

[0041] Based on the technical solution of the above embodiment 1, the n=5, that is, the second superimposed magnet is composed of 5*5 magnets; the specific magnetization direction of each NdFeB magnet is as follows Figure 4 shown.

[0042] In this embodiment, 5*5 superimposed magnets are selected. The interaction enables the composite superimposed magnet structure to enhance the magnetic field strength in a specific direction of the magnet arrangement combination. The small magnet combination can achieve a large magnetic field strength on one side and a very small basic magnetic field strength on the other side, thereby avoiding the weak magnetic surface from affecting the magnetic circuit between the magnets.

[0043] The magnets in the superimposed magnet are arranged so that the magnetic field of the magnetic poles in the contact surface direction of the bottom magnet is more stable, and the self-shielding effect or magnetic field strength in this direction is more effective; the relationship between the magnetic field direction of the bottom magnet and the magnet direction of the superimposed magnet is specifically reflected in the strong magnetic surface and weak magnetic surface of the bottom magnet, and the strong magnetic surface and weak magnetic surface of the magnet in the superimposed magnet matrix, and the strong magnetic surfaces are in the same direction when superimposed.

[0044] Specifically, taking the superimposed 5*5 magnet array in this embodiment as an example, the bottom surface of the bottom magnet combination exhibits a self-shielding effect, and the top surface has an enhanced magnetic field strength. On the basis of the bottom magnet combination, a 5*5 magnet array is added to the top surface. The magnet array requires that the self-shielding effect generated by the combination is in the same direction as the self-shielding effect of the bottom magnet combination.

[0045] Example 3

[0046] Based on the above technical solution, in each layer of stacked magnets, the first stacked magnet 21 stacked on the first magnet 11 has the same shape and size as the first magnet 11, and the second stacked magnet 22 stacked on the second magnet 12 has the same shape and size as the second magnet 12.

[0047] In this embodiment, the shape, size and magnetization direction of the superimposed magnets in the superimposed layer magnets are the same as those of the base magnets; in this embodiment, a simple superposition is adopted, that is, a magnet array with the same shape and size is simply superimposed on the basis of the base magnet 1 as the superimposed layer magnet; specifically, a magnet with the same structural shape as the first magnet 11 is superimposed above the first magnet 11, and a magnet with the same structural shape as the second magnet 12 is superimposed above the second magnet 12; the magnetic field strength can also be improved, and the implementation is simpler and more convenient.

[0048] like Figure 5 The figure shows a schematic diagram of the magnetic field strength under the base magnet only, simple superposition form and composite superposition form; according to the peak intensity in the figure, it can be seen that the magnetic field strength obtained in the composite superposition form is greater than the magnetic field strength in the simple superposition form and the base magnet only, respectively; the magnetic field strength in the simple superposition form is twice the magnetic field strength in the base magnet only form, and the magnetic field strength in the composite superposition form is even higher.

[0049] Example 4

[0050] This embodiment provides a planar motor, including the composite superimposed magnet structure described in any of the above embodiments. The unidirectional magnetic field strength of the magnetic field in the mover module is enhanced, and the magnetic field reaction generated by the mover module and the stator is stronger, which can provide greater magnetic force for six degrees of freedom feedback and have better stability in the Z axis, pitch angle, and yaw angle.

[0051] The basic principle and main features of the utility model are shown and described above. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments. Therefore, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the appended claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A composite superimposed magnet structure, characterized in that: The invention comprises a base magnet (1) and a superimposed layer magnet (2), wherein the base magnet (1) comprises a plurality of base magnets, the superimposed layer magnet (2) is arranged at the top of the base magnet (1) and forms a magnetic field with unidirectionally enhanced magnetic field strength with the base magnet (1), the superimposed layer magnet (2) comprises a plurality of superimposed magnets and is arranged corresponding to the base magnet, and the superimposed layer magnet (2) is arranged in at least two layers.

2. A composite superimposed magnet structure according to claim 1, characterized in that: The base magnet comprises a first magnet (11) and a second magnet (12), a plurality of the first magnets (11) are provided, and the second magnet (12) is provided at the center position of the plurality of first magnets (11).

3. A composite superimposed magnet structure according to claim 2, characterized in that: The stacked layer magnet (2) is provided with two layers, and the stacked magnets include a first stacked magnet (21) and a second stacked magnet (22), the first stacked magnet (21) being correspondingly arranged above the first magnet (11), and the second stacked magnet (22) being correspondingly arranged above the second magnet (12).

4. A composite superimposed magnet structure according to claim 3, characterized in that: In each layer of superimposed magnets, the first superimposed magnet (21) superimposed on the corresponding first magnet (11) has the same shape and size as the first magnet (11), and the second superimposed magnet (22) superimposed on the corresponding second magnet (12) is an n*n small magnet array.

5. A composite superimposed magnet structure according to claim 4, characterized in that: The number of small magnets in each stacked layer of magnets is (n*n) 上一层磁铁个数 .

6. A composite superimposed magnet structure according to claim 4 or 5, characterized in that: Said n≥5.

7. The composite superimposed magnet structure according to claim 3, characterized in that: In each layer of superimposed magnets, the first superimposed magnet (21) superimposed on the first magnet (11) has the same shape and size as the first magnet (11), and the second superimposed magnet (22) superimposed on the second magnet (12) has the same shape and size as the second magnet (12).

8. The composite superimposed magnet structure according to claim 1, characterized in that: The magnets in the base layer magnet (1) and the superimposed layer magnet (2) are both neodymium iron boron magnets.

9. A planar motor comprising the composite superimposed magnet structure according to any one of claims 1 to 8.

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