High-performance magnetic core and inductor

Abstract

The utility model relates to a high-performance magnetic core and an inductor, and relates to the technical field of inductors. The high-performance magnetic core comprises a central magnet, an upper magnet and a lower magnet, wherein the upper magnet is arranged at the upper end of the central magnet along the height direction; the lower magnet is arranged at the lower end of the center magnet in the height direction, and the section of the high-performance magnetic core in the height direction is circular. The magnetic core is used for solving the problem that due to the fact that the stress area of an existing magnetic core is small, the magnetic core is prone to damage when extruded by external force.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inductors, and particularly to a high-performance magnetic core and an inductor. BACKGROUND

[0002] An inductor is an element capable of converting electrical energy into magnetic energy for storage, and is widely used in various circuit structures. Existing inductors are generally composed of a magnetic core and a coil and the like. With the miniaturization of electronic products and the increasing demand for high performance, the requirements for the magnetic core are also becoming higher and higher.

[0003] In particular, in terms of the geometric shape of the magnetic core, the traditional square or rectangular cross-section design can cause the coil to not fit tightly during assembly, and the force receiving area is small, which can easily cause damage to the magnetic core when subjected to external pressure, thereby affecting the overall performance of the magnetic core and reducing the working reliability and service life of the magnetic core. CONTENT OF THE INVENTION

[0004] The present application provides a high-performance magnetic core to solve the problem that the current magnetic core has a small force receiving area, which can easily cause damage to the magnetic core when subjected to external pressure.

[0005] A high-performance magnetic core comprises:

[0006] a center magnet;

[0007] an upper magnet arranged at the upper end of the center magnet in the height direction;

[0008] a lower magnet arranged at the lower end of the center magnet in the height direction, and the cross-section of the high-performance magnetic core in the height direction is circular.

[0009] By adopting the above technical solution, the cross-section of the high-performance magnetic core in the height direction is circular, which can improve the force receiving area of the magnetic core. When the magnetic core is subjected to external pressure, the uniformly distributed force receiving area can disperse the pressure, thereby reducing the risk of damage to the magnetic core, and further improving the working performance and stability of the magnetic core. In addition, compared with the magnetic core with a square cross-section, the coil can fit more tightly when assembled on this circular magnetic core, thereby saving the amount of wire material and improving the space utilization.

[0010] In one embodiment, the high-performance magnetic core is annular, and the upper magnet and the lower magnet are mirror-symmetric with respect to the center magnet.

[0011] By adopting the technical scheme, the symmetrical structure makes the cross section of the magnetic core as a relatively complete circle, avoiding the uneven situation of the upper and lower ends. If the upper and lower ends are not symmetrical, the stress area will be reduced, and when subjected to external force, the local pressure of the magnetic core will be too large, which is easy to cause damage. The symmetrical structure ensures that the magnetic core is uniformly stressed, enhances the strength and stability of the magnetic core, and improves the service life thereof.

[0012] In one of the embodiments, the upper magnet comprises a plurality of first magnets, each of which is annular, and the first magnets are stacked at the upper end in the height direction and decrease in length in sequence.

[0013] By adopting the technical scheme, the upper magnet is approximately semicircular in shape and conforms to the distribution law of the magnetic circuit, which can better guide the magnetic lines of force, reduce the magnetic resistance, and improve the permeability and inductance performance of the magnetic core. At the same time, the stacked structure is convenient for manufacturing and assembling, and the number and size of the first magnets can be adjusted according to different performance requirements.

[0014] In one of the embodiments, the lower magnet comprises a plurality of second magnets, each of which is annular, and the second magnets are stacked at the lower end in the height direction and decrease in length in sequence.

[0015] By adopting the technical scheme, the structure is similar to the upper magnet, which not only facilitates assembly, but also improves the stress area of the magnetic core.

[0016] In one of the embodiments, the height of the center magnet is greater than the height of the first magnet and the second magnet.

[0017] By adopting the technical scheme, when higher magnetic flux or specific magnetic circuit distribution is required according to actual conditions, the scheme with a higher center magnet can be selected.

[0018] In one of the embodiments, the height of the center magnet is equal to the height of the first magnet and the second magnet.

[0019] By adopting the technical scheme, other application scenarios can be applied, for example, when there is a strict requirement for space size, the scheme with equal height can make the magnetic core structure more compact.

[0020] In one of the embodiments, the outer surface of the high-performance magnetic core is coated with insulating paint or wrapped with insulating paper.

[0021] By adopting the technical scheme, the insulating paint or insulating paper can effectively isolate the electrical connection between the magnetic core and the outside world, prevent the occurrence of electric leakage, and improve the electrical safety of the magnetic core. At the same time, it can also protect the magnetic core from external environmental factors such as moisture and dust, prolonging the service life of the magnetic core.

[0022] In one of the embodiments, the outer surface of the high-performance magnetic core is sleeved with an anti-skid layer.

[0023] By adopting the above technical solution, the tightness and uniformity of the coil winding have a great influence on the performance of the inductor. The anti-skid layer increases the friction of the surface of the magnetic core, so that the coil can be more stably wound on the magnetic core, ensuring the quality of the coil winding, thereby improving the performance consistency and stability of the inductor.

[0024] In one of the embodiments, the material of the high-performance magnetic core is iron-based nanocrystalline alloy.

[0025] By adopting the above technical solution, the iron-based nanocrystalline alloy has excellent magnetic properties such as high saturation magnetic induction, high initial permeability, low coercivity, and low high-frequency loss under high magnetic induction. These characteristics enable the magnetic core to perform better in high-frequency and high-power application scenarios, such as higher efficiency, smaller size, and lower heat generation, thereby improving the performance and reliability of the entire inductor.

[0026] The application also provides an inductor comprising a coil and a high-performance magnetic core, wherein the coil is wound around the high-performance magnetic core.

[0027] By adopting the above technical solution, the magnetic induction lines diverge from the inside to the outside, the inside is relatively dense, and the outside is relatively loose. The magnetic core can ensure that the medium through which the magnetic induction lines pass is uniform, improve the utilization rate of the working area of the magnetic core, and significantly improve the inductance value, permeability, anti-interference ability, etc. of the entire inductor, thereby better meeting the requirements.

[0028] In summary, the application at least includes the following beneficial effects:

[0029] 1. The cross section of the high-performance magnetic core along the height direction is circular, which can improve the stress area of the magnetic core. When the magnetic core is subjected to external pressure, the uniformly distributed stress area can disperse the pressure, thereby reducing the risk of damage to the magnetic core, and further improving the working performance and stability of the magnetic core. In addition, compared with a square cross-section magnetic core, the coil can be more tightly fitted when assembled on this circular magnetic core, thereby saving the amount of wire and improving the space utilization.

[0030] 2. The upper magnet has a shape similar to a semicircle, and conforms to the distribution law of the magnetic circuit, which can better guide the magnetic force lines, reduce the magnetic resistance, and improve the permeability and inductance performance of the magnetic core. At the same time, this laminated structure is also convenient for manufacturing and assembling, and the number and size of the first magnets can be adjusted according to different performance requirements.

[0031] 3. The insulating coating or insulating paper can effectively isolate the magnetic core from the electrical connection with the outside world, prevent the occurrence of electric leakage phenomenon, and improve the electrical safety of the magnetic core. At the same time, it can also protect the magnetic core from the influence of external environmental factors such as moisture and dust, and prolong the service life of the magnetic core. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall structure of a high-performance magnetic core provided by the embodiments of the present application;

[0033] Figure 2 is a schematic diagram of the structure of a high-performance magnetic core along the height direction provided by the embodiments of the present application;

[0034] Figure 3 is a schematic diagram of the structure of a high-performance magnetic core along the height direction provided by the embodiments of the present application; Figure 2

[0035] BRIEF DESCRIPTION OF DRAWINGS1. High-performance magnetic core; 11. Center magnet; 12. Upper magnet; 121. First magnet; 13. Lower magnet; 131. Second magnet. DETAILED DESCRIPTION

[0036] The following will be described in detail in combination with the accompanying drawings. Figures 1-3 The high-performance magnetic core provided by the present application will be further described in detail.

[0037] Embodiment 1

[0038] Please refer to Figures 1-3 The high-performance magnetic core 1 provided by the embodiments of the present application includes a center magnet 11, an upper magnet 12, and a lower magnet 13.

[0039] As shown in Figure 1 The center magnet 11 can be made of various materials, such as iron-based nanocrystalline alloy or silicon steel sheet, etc. The center magnet 11 has high magnetic permeability and good saturation magnetic induction strength, and can provide a large magnetic field strength in a small volume.

[0040] As shown in Figure 2As shown, the upper magnet 12 is arranged at the upper end of the center magnet 11 in the height direction, and the lower magnet 13 is arranged at the lower end of the center magnet 11 in the height direction. The entire high-performance magnetic core 1 has a circular cross-section in the height direction. Specifically, the high-performance magnetic core 1 is annular, and the upper magnet 12 and the lower magnet 13 are mirror-symmetric with respect to the center magnet 11. The annular structure of the high-performance magnetic core 1 can be manufactured by one-piece forming or by splicing multiple arc-shaped segments, so that the center magnet 11, the upper magnet 12, and the lower magnet 13 each include multiple segments. Regardless of the manufacturing method, it is necessary to ensure that the connections between the segments are firm to avoid loosening due to vibration or impact. At the same time, this mirror design makes the overall cross-section a relatively complete circle, and does not cause unevenness at the upper and lower ends, resulting in a reduction in the force area and damage to the magnetic core. Since the upper magnet 12 and the lower magnet 13 have the same shape and are approximately semicircular, they can be used interchangeably, which is convenient for production and maintenance. In addition, this symmetrical design also helps to balance the center of gravity of the magnetic core and reduce vibration and noise generated during operation.

[0041] As shown in FIG. 1, Figure 3 The upper magnet 12 can be made of the same material as the center magnet 11 and fixed to the upper end of the center magnet 11 by welding or bonding. In this embodiment, the upper magnet 12 can also be divided into multiple first magnets 121. The first magnets 121 are annular, stacked in the upper direction in the height direction, and decrease in length in sequence. The height of each first magnet 121 is the same, and the height and width of the first magnet 121 can be adjusted according to actual needs to achieve the best magnetic field distribution effect. The more layers of first magnets 121, the closer the semicircle formed to a perfect semicircle, but the manufacturing cost is also increased. If the application scenario has high requirements for magnetic field distribution, more layers can be selected; if cost control is strict, fewer layers can be selected. In addition, there can be gaps between adjacent first magnets 121. Since the medium is air, an air gap is formed, which can effectively prevent magnetic saturation while maintaining low loss, good shielding effect, and also facilitates heat dissipation and improves product performance.

[0042] The lower magnet 13 is also made of the same material as the center magnet 11 and is fixed to the lower end of the center magnet 11 by welding or bonding. In this embodiment, the lower magnet 13 can also be divided into a plurality of second magnets 131, which are annular, stacked along the height direction and gradually decrease in length, forming an approximate semicircle. The height of each second magnet 131 is the same, so the height of the first magnet 121 and the second magnet 131 is the same. The height of the center magnet 11 can be greater than the height of the first magnet 121 and the second magnet 131, thereby having higher magnetic permeability and magnetic induction strength; the height of the center magnet 11 can also be equal to the height of the first magnet 121 and the second magnet 131, which makes the size of the magnetic core more compact and suitable for applications where space is limited. The two ways can be selected according to different situations.

[0043] In addition, the outer surface of the high-performance magnetic core 1 can also be sleeved with insulating paper or coated with an insulating coating to prevent short circuit or leakage between the coil and the magnetic core. The thickness of the insulating paper can be selected according to actual needs, generally between 0.1mm and 0.5mm, which can ensure the insulation effect and will not significantly increase the overall volume of the magnetic core. In addition, the outer surface of the high-performance magnetic core 1 can also be sleeved with an anti-skid layer to prevent the coil from sliding during winding. The anti-skid layer can be made of rubber or polyurethane, which has a good friction coefficient and can improve the stability of the coil without affecting the performance of the magnetic core. In this embodiment, the anti-skid layer can be a rubber layer, which not only prevents the coil from sliding, but also acts as a buffer when subjected to external force, preventing damage to the magnetic core.

[0044] The application also provides an inductor comprising a coil and a high-performance magnetic core 1, the coil being wound around the high-performance magnetic core 1. Specifically, the coil can be made of copper wire or other conductive materials, and its diameter and number of turns can be adjusted according to actual needs to achieve the desired inductance value. The winding method of the coil can be single-layer or multi-layer, depending on the required application scenario. For example, for high-frequency applications, thin wire single-layer winding can be used to reduce eddy current loss; for low-frequency applications, thick wire multi-layer winding can be used to increase inductance. The inductor can also include a skeleton, with the coil being fixed to the skeleton.

[0045] The implementation principle of this embodiment is that the high-performance magnetic core 1 is designed as a circular cross-section along the height direction, and a plurality of annular magnets are arranged in the upper and lower parts, making the overall structure of the magnetic core more compact, improving the winding density of the coil, reducing the waste of wire and improving the space utilization. At the same time, this design also increases the force area of the magnetic core, reduces the risk of damage caused by external pressure, and improves the working reliability and life of the magnetic core. By adding insulating paper and an anti-skid layer to the outer surface, the safety and practicality of the magnetic core are further enhanced.

[0046] In addition, the high-performance magnetic core 1 also helps to optimize the magnetic field distribution, ensures that the medium through which the magnetic induction line passes is uniform, improves the utilization rate of the working area of the magnetic core, reduces magnetic leakage, and improves the stability of the inductance value. Overall, this design not only improves the performance of the inductor, but also prolongs its service life, meeting the requirements of modern electronic devices for high performance.

[0047] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made in structure, shape, principle, etc. according to the present application should be covered within the protection scope of the present application.

Claims

1. A high performance magnetic core, characterized by, The high-performance magnetic core (1) comprises: a center magnet (11); an upper magnet (12) arranged at an upper end of the center magnet (11) in a height direction; a lower magnet (13) arranged at a lower end of the center magnet (11) in the height direction, and a cross section of the high-performance magnetic core (1) in the height direction is circular.

2. A high performance magnetic core as claimed in claim 1, wherein, The high-performance magnetic core (1) is annular, and the upper magnet (12) and the lower magnet (13) are mirror-symmetrically arranged relative to the center magnet (11).

3. A high performance magnetic core as claimed in claim 2, wherein, The upper magnet (12) comprises a plurality of first magnets (121), each of which is annular, and the first magnets (121) are arranged in a stack at upper ends in the height direction and have lengths decreasing in sequence.

4. A high performance magnetic core as claimed in claim 3, wherein, The lower magnet (13) comprises a plurality of second magnets (131), each of which is annular, and the second magnets (131) are arranged in a stack at lower ends in the height direction and have lengths decreasing in sequence.

5. A high performance magnetic core as claimed in claim 4, wherein, The height of the center magnet (11) is greater than the height of the first magnets (121) and the second magnets (131).

6. A high performance magnetic core as claimed in claim 4, wherein, The height of the center magnet (11) is equal to the height of the first magnets (121) and the second magnets (131).

7. A high performance magnetic core as claimed in claim 1, wherein, An outer surface of the high-performance magnetic core (1) is coated with insulating paint or is sleeved with insulating paper.

8. A high performance magnetic core as claimed in claim 1, wherein, An outer surface of the high-performance magnetic core (1) is sleeved with an anti-skid layer.

9. A high performance magnetic core as claimed in claim 1, wherein, The high-performance magnetic core (1) is made of iron-based nanocrystalline alloy.

10. An inductor characterized by The high-performance magnetic core (1) is annular, and the upper magnet (12) and the lower magnet (13) are mirror-symmetrically arranged relative to the center magnet (11). The high-performance magnetic core (1) comprises: a center magnet (11); an upper magnet (12) arranged at an upper end of the center magnet (11) in a height direction; a lower magnet (13) arranged at a lower end of the center magnet (11) in the height direction, and a cross section of the high-performance magnetic core (1) in the height direction is circular. The high-performance magnetic core (1) is annular, and the upper magnet (12) and the lower magnet (13) are mirror-symmetrically arranged relative to the center magnet (11). The upper magnet (12) comprises a plurality of first magnets (121), each of which is annular, and the first magnets (121) are arranged in a stack at upper ends in the height direction and have lengths decreasing in sequence. The lower magnet (13) comprises a plurality of second magnets (131), each of which is annular, and the second magnets (131) are arranged in a stack at lower ends in the height direction and have lengths decreasing in sequence. The height of the center magnet (11) is greater than the height of the first magnets (121) and the second magnets (131). The height of the center magnet (11) is equal to the height of the first magnets (121) and the second magnets (131). An outer surface of the high-performance magnetic core (1) is coated with insulating paint or is sleeved with insulating paper. An outer surface of the high-performance magnetic core (1) is sleeved with an anti-skid layer. The high-performance magnetic core (1) is made of iron-based nanocrystalline alloy. The high-performance magnetic core (1) is annular, and the upper magnet (12) and the lower magnet (13) are mirror-symmetrically arranged relative to the center magnet (11). The high-performance magnetic core (1) comprises: a center magnet (11); an upper magnet (12) arranged at an upper end of the center magnet (11) in a height direction; a

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