GP type shielding magnetic core

Abstract

The utility model relates to the technical field of shielding, in particular to a GP type shielding magnetic core which comprises a first shielding piece and a second shielding piece. The second shielding piece is arranged below the first shielding piece, and an accommodating space for accommodating a coil is formed between the first shielding piece and the second shielding piece; the fixing hole is formed in the center of the first shielding piece and the center of the second shielding piece, and the fixing hole is used for fixedly connecting the first shielding piece and the second shielding piece; and the bulges are arranged on the first shielding piece and the second shielding piece. The first shielding piece and the second shielding piece are formed on the periphery of the coil, and the completely-wrapped shielding piece is formed on the periphery of the coil, so that corresponding interference signals and thermal inductance are shielded, and the shielding effect on the coil is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to shielding technical field, especially relates to a GP type shielding magnetic core. BACKGROUND

[0002] Many electric power equipment internally install the coil, such as transformer, electric reactance, mutual inductor, etc., and the leakage magnetic or electromagnetic radiation generated by coil can make the metal component or shell outside coil locally heat, and also can interfere with the normal work of instrument, computer or other electric power equipment.

[0003] In prior art, shielding member is usually arranged on the periphery of coil to shield part of interference signal and heat. GP type magnetic core (commonly known as pot type magnetic core) is generally used for shielding operation, but the GP type magnetic core in prior art is mostly partially surrounded, and the shielding effect is relatively weak. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a GP type shielding magnetic core, which improves the shielding effect of coil in prior art.

[0005] To achieve the above object, the utility model adopts the technical scheme of:

[0006] The utility model provides a GP type shielding magnetic core, which comprises:

[0007] A first shielding member;

[0008] A second shielding member is arranged below the first shielding member, and a containing space for accommodating a coil is formed between the first shielding member and the second shielding member;

[0009] A fixing hole is formed in the center of the first shielding member and the second shielding member, and the fixing hole is used for fixedly connecting the first shielding member and the second shielding member;

[0010] A protrusion is arranged on the first shielding member and the second shielding member.

[0011] Further, the first shielding member is a cylindrical hollow shell structure with an opening downward, and the second shielding member is a cylindrical hollow shell structure with an opening upward.

[0012] Further, the first shielding member and the second shielding member are arranged in a symmetrical manner.

[0013] Further, a first wire outlet hole is formed in the first shielding member, and a second wire outlet hole is formed in the second shielding member, and the first wire outlet hole and the second wire outlet hole are used for passing the coil.

[0014] Further, the protrusions are arranged on the first shielding member and the second shielding member to provide sintering point position supports.

[0015] Further, the protrusions include a first protrusion and a second protrusion, and the first protrusion is located outside the second protrusion.

[0016] Further, the first protrusion has an outer diameter greater than that of the second protrusion, and the first protrusion has a height consistent with that of the second protrusion.

[0017] Further, the side walls of the first shielding member and the second shielding member have a thickness of 0.5-1 cm.

[0018] Thanks to the above technical solution, the GP type shielding magnetic core has the following advantages compared with the prior art:

[0019] The GP type shielding magnetic core has a shielding member completely covering the outer periphery of the coil to shield corresponding interference signals and heat, and improve the shielding effect on the coil. Compared with the partial surrounding shielding member in the prior art, the GP type shielding magnetic core has a relatively closed shielding space and a stronger shielding effect. Meanwhile, the protrusions are arranged on the first shielding member and the second shielding member to provide corresponding sintering point position supports, improve the flatness of the shielding member during sintering, and ensure the yield of the shielding member during sintering. BRIEF DESCRIPTION OF DRAWINGS

[0020] Some specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, which are exemplary but not limiting. The same reference signs in the drawings represent the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0021] Fig. 1 is a structural schematic view of a GP type shielding magnetic core provided by the present application;

[0022] Fig. 2 is a top view of a first shielding member provided by the present application;

[0023] Fig. 3 is a top view of a second shielding member provided by the present application;

[0024] In the drawings, the reference signs are explained as follows:

[0025] 1, first shielding member; 101, first wire outlet hole; 2, second shielding member; 201, second wire outlet hole; 3, fixing hole; 4, protrusion. DETAILED DESCRIPTION

[0026] The technical solutions of the utility model will be clearly and completely described below in combination with the drawings. Obviously, the described embodiments are some of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Referring to Figs. 1 to 3 The GP type shielding magnetic core provided in the utility model comprises a first shielding member 1, a second shielding member 2, a fixing hole 3 and a protrusion 4.

[0028] The second shielding member 2 is arranged below the first shielding member 1, and the first shielding member 1 and the second shielding member 2 jointly enclose a containing space for accommodating a coil. Specifically, the first shielding member 1 is a downwardly open cylindrical hollow shell structure, and the second shielding member 2 is an upwardly open cylindrical hollow shell structure. The first shielding member 1 and the second shielding member 2 are arranged in a symmetrical manner, forming the containing space of the coil. The first shielding member 1 and the second shielding member 2 can be arranged in a split connection mode or an integrated connection mode, as long as there is enough space to accommodate the coil.

[0029] In the embodiment, the first shielding member 1 and the second shielding member 2 are of the same size and shape, i.e. cylindrical. The inside of the containing space is relatively symmetrical in all directions, which can effectively balance the shielding effect and avoid uneven electromagnetic interference caused by directionality. In addition, the stress distribution is relatively uniform in the cylindrical shielding space, reducing the stress concentration caused by the shape, thereby improving the stability and durability of the structure. Of course, the first shielding member 1 and the second shielding member 2 are not limited to be cylindrical, but can also be cubic or prismatic. The specific shape can be adjusted.

[0030] If the first shielding member 1 and the second shielding member 2 are arranged to be of different sizes, it should also be covered by the protection scope of the utility model. For example, the first shielding member 1 can be arranged in the second shielding member 2, so that the outer contour of the first shielding member 1 is adapted to the inner contour of the second shielding member 2; or the first shielding member 1 can be arranged on the second shielding member 2, so that the inner contour of the first shielding member 1 is adapted to the outer contour of the second shielding member 2, thereby forming a shielding magnetic core. The specific size can also be adjusted as needed.

[0031] The first shielding member 1 and the second shielding member 2 are both made of shielding material, generally soft magnetic ferrite material.

[0032] In the embodiment, a fixing hole 3 is formed at the center of the first shielding member 1 and the second shielding member 2, the fixing hole 3 on the first shielding member 1 and the fixing hole 3 on the second shielding member 2 are coaxially arranged, and the first shielding member 1 and the second shielding member 2 are fixedly connected by penetrating a bolt at the fixing hole 3. Of course, a positioning pin can also be penetrated at the fixing hole 3, and other ways of fixedly connecting the first shielding member 1 and the second shielding member 2 should be covered in the protection scope of the utility model.

[0033] In the embodiment, a first wire outlet hole 101 is formed on the first shielding member 1, a second wire outlet hole 201 is formed on the second shielding member 2, and the size of the first wire outlet hole 101 is consistent with the hole diameter of the second wire outlet hole 201. The first wire outlet hole 101 and the second wire outlet hole 201 form wire outlet holes for the coils in the shielding magnetic core to pass through. The shape and the hole diameter of the wire outlet holes are conventionally arranged.

[0034] In addition, in the embodiment, a plurality of protrusions 4 are arranged on the outer surfaces of the first shielding member 1 and the second shielding member 2. The protrusions 4 are arranged to provide corresponding sintering point support for the first shielding member 1 and the second shielding member 2, so that the first shielding member 1 and the second shielding member 2 are more stable when placed on the sintering plate, and the sintering yield of the first shielding member 1 and the second shielding member 2 is ensured.

[0035] Specifically, the protrusion 4 includes a first protrusion 401 and a second protrusion 402, and the first protrusion 401 is arranged outside the second protrusion 402. The outer diameter of the first protrusion 401 is greater than the outer diameter of the second protrusion 402, and the height of the first protrusion 401 is consistent with the height of the second protrusion 402.

[0036] In the embodiment, the first protrusion 401 is arranged to provide corresponding stability for the first shielding member 1 and the second shielding member 2 during sintering. The second protrusion 402 is arranged inside the first protrusion 401 to provide corresponding support force for the first shielding member 1 and the second shielding member 2. In addition, the first protrusion 401 and the second protrusion 402 are both in a semi-spherical structure, which can reduce the contact area of the first shielding member 1 and the second shielding member 2 when they contact the sintering plate, and form corresponding sintering point support while providing sintering air gap.

[0037] In the embodiment, the side walls of the first shielding member 1 and the second shielding member 2 have a certain thickness, and the thickness of the side walls of the two is controlled to be 0.5-1cm. If the side wall is too thick, the overall structure of the shielding space will increase in weight, which may cause difficulty in installation and support. Although the thickness that is too large may improve the shielding effect of some frequencies, it may also cause the increase of signal reflection of other frequencies, thereby affecting the overall performance. In addition, the shielding space that is too thin may not effectively shield the external electromagnetic interference. Therefore, the thickness of the side wall is preferably controlled to be 0.5-1cm.

[0038] In summary, the GP shielding core provided in the utility model, through the first shielding member 1 and the second shielding member 2 formed on the outer periphery of the coil, the shielding member of complete covering type is formed on the outer periphery of the coil, so as to shield corresponding interference signal and heat feeling, and the shielding effect of the coil is improved.Compared with the partial surrounding type shielding member in the prior art, the shielding space of the GP shielding core provided in the utility model is relatively closed, and the shielding effect is stronger.

[0039] The above examples are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable people skilled in the art to understand the content of the utility model and implement it, and it cannot limit the protection scope of the utility model, and any equivalent changes or modifications made according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A GP type shielded magnetic core, characterized by, The utility model relates to a shielding device for coil, which comprises: a first shielding part (1); a second shielding part (2) arranged below the first shielding part (1), a containing space for accommodating a coil being formed between the first shielding part (1) and the second shielding part (2); a fixing hole (3) arranged at the center of the first shielding part (1) and the second shielding part (2), the fixing hole (3) being used for fixedly connecting the first shielding part (1) and the second shielding part (2); a protrusion (4) arranged on the first shielding part (1) and the second shielding part (2).

2. A GP-type shielded magnetic core according to claim 1, wherein The first shielding part (1) is a hollow cylindrical shell structure with an opening downward, and the second shielding part (2) is a hollow cylindrical shell structure with an opening upward.

3. A GP-type shielded magnetic core according to claim 2, wherein The first shielding part (1) and the second shielding part (2) are arranged symmetrically.

4. A GP-type shielded magnetic core according to claim 2, wherein A first wire outlet hole (101) is arranged on the first shielding part (1), and a second wire outlet hole (201) is arranged on the second shielding part (2), the first wire outlet hole (101) and the second wire outlet hole (201) being used for passing the coil.

5. A GP-type shielded magnetic core according to claim 1, wherein The protrusion (4) is arranged in plurality, and the protrusion (4) is used for providing sintering point position support for the first shielding part (1) and the second shielding part (2).

6. A GP-type shielded magnetic core according to claim 5, wherein The protrusion (4) comprises a first protrusion (401) and a second protrusion (402), and the first protrusion (401) is located outside the second protrusion (402).

7. A GP-type shielded magnetic core according to claim 6, wherein The outer diameter of the first protrusion (401) is greater than the outer diameter of the second protrusion (402), and the height of the first protrusion (401) is consistent with the height of the second protrusion (402).

8. A GP-type shielded magnetic core according to claim 1, wherein The side wall of the first shielding part (1) and the side wall of the second shielding part (2) have a certain thickness, and the thickness of the side wall is 0.5-1 cm.

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