Potting magnetic device capable of preventing magnetic core from cracking
By inserting a hollow sleeve into the core body, the problem of core cracking caused by the expansion of the potting medium was solved, thereby reducing damage and improving product performance.
Patent Information
- Application Number
- CN202520638159.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-04-07
AI Technical Summary
When the temperature rises, the mechanical stress generated by the expansion of the potting medium in traditional potted magnetic devices can cause the magnetic core to crack, affecting product performance.
A hollow sleeve is inserted into the magnetic core body, allowing the potting medium to release stress through the sleeve, forming a pressure relief path and reducing the expansion pressure on the magnetic core.
It effectively reduces damage and cracking of the magnetic core caused by the expansion of the potting medium, thus improving product performance.
Smart Images
Figure CN223977764U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of magnetic core protection technology, and in particular to a potted magnetic device for preventing magnetic core cracking. Background Technology
[0002] When magnetic components are in operation, their temperature rises. The potting medium for traditionally potted magnetic devices is usually an elastic colloid. As the product temperature rises, it expands and generates a lot of mechanical stress. Under the action of the expansion force of the potting medium, the magnetic core strength of the magnetic component is not enough to resist the expansion force of the potting compound, which leads to cracking and damage of the magnetic core, thus affecting the product performance. Summary of the Invention
[0003] In view of this, the purpose of this utility model embodiment is to provide a potted magnetic device that prevents core cracking, which can reduce core cracking damage and improve product performance.
[0004] To address one of the aforementioned problems, this utility model provides a potted magnetic device for preventing core cracking, comprising a potting medium, a magnetic core body, and at least one hollow sleeve, wherein the potting medium encapsulates the magnetic core body and the hollow sleeve into one unit, and at least one hollow sleeve is inserted into the magnetic core body.
[0005] The hollow sleeve includes at least one port configured to allow stress to be released through the hollow sleeve when the potting medium expands.
[0006] Optionally, the hollow sleeve is a curved sleeve or a multi-segment sleeve.
[0007] Optionally, at least one hollow sleeve is inserted into the magnetic core body in such a way that both arms of the curved sleeve or multi-segment sleeve are located within the hollow portion of the magnetic core body.
[0008] Optionally, at least one hollow sleeve is inserted into the magnetic core body in such a way that the two arms of the curved sleeve or the multi-segment sleeve are respectively located on both sides of the hollow portion of the magnetic core body.
[0009] Optionally, the hollow sleeve is a cylindrical sleeve.
[0010] Optionally, the opening of the cylindrical sleeve embedded in the potting medium is sealed.
[0011] Optionally, the hollow sleeve includes at least one layer of flexible material.
[0012] Optionally, the shape of the magnetic core body includes one or more of the following: ring type, can type, E type, EC type or PQ type.
[0013] Optionally, each of the hollow sleeves has at least one opening that is flush with or extends beyond the surface of the potting medium.
[0014] Optionally, the potted magnetic device further includes a housing, in which the potting medium encapsulates the magnetic core body and the hollow sleeve, and the housing includes one or more layers of metal, ceramic, or plastic housing.
[0015] The present invention has the following beneficial effects: By inserting a hollow sleeve into the magnetic core body, when the magnetic element is working and the temperature rises, the potting medium can squeeze the hollow sleeve to form a pressure relief path, thereby reducing the shear force on the magnetic core body and reducing the expansion pressure of the potting medium on the magnetic core body. This can effectively reduce the damage and cracking of the magnetic core body caused by the expansion of the potting medium. Attached Figure Description
[0016] Wherein: 1-shell, 2-magnetic core body, 3-hollow sleeve, 4-potting medium.
[0017] Figure 1 This is a diagram of an un-filled semi-finished product of a potted magnetic device designed to prevent core cracking, as provided by this utility model.
[0018] Figure 2 This is a finished product image of a potted magnetic device with anti-cracking properties provided by this utility model;
[0019] Figure 3 This is a schematic diagram of a hollow sleeve inserted into a magnetic core, provided by this utility model;
[0020] Figure 4 This is a schematic diagram of several sizes of U-shaped sleeves provided by this utility model. Detailed Implementation
[0021] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that the terms "surface" and other designations used in this specification indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These designations are used solely for the purpose of facilitating and simplifying the description of this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0022] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.
[0023] In order to solve the technical problems existing in the prior art, the following will describe in detail, with reference to the accompanying drawings, a potted magnetic device for preventing magnetic core cracking provided by the present invention.
[0024] In some embodiments, such as Figure 1-2 As shown, Figure 1 This is an image of an un-potted semi-finished product of a potted magnetic device designed to prevent core cracking. Figure 2 This is a finished product image of a potted magnetic device designed to prevent core cracking. The embodiment of this utility model provides a potted magnetic device for preventing core cracking, comprising a potting medium, a magnetic core body, and at least one hollow sleeve. The potting medium encapsulates the magnetic core body and the hollow sleeve into a single unit, and the magnetic core body is inserted through at least one hollow sleeve. The hollow sleeve includes at least one opening, which is configured to allow stress release through the hollow sleeve when the potting medium expands.
[0025] The core body refers to the magnetic element body containing the core. Optionally, the port is configured to allow stress to be released through the hollow sleeve when the potting medium expands. Specifically, this may be, but is not limited to, that at least one port of each hollow sleeve is flush with or extends beyond the surface of the potting medium.
[0026] The potting medium may include, but is not limited to, a layer of potting colloid. In order to better achieve the anti-crack effect, the bottom of the hollow sleeve can be flush with the bottom surface of the potting medium as much as possible, such as in contact with the shell.
[0027] The cross-section of the hollow sleeve opening can be, but is not limited to, a quadrilateral, a circle, or a triangle. When there are two or more hollow sleeves, the cross-section of the hollow sleeve opening can be, but is not limited to, a circle or a polygon, or a combination of one or more of these shapes. For example, all hollow sleeve openings may have circular cross-sections, or some hollow sleeve openings may have circular cross-sections, while the remaining hollow sleeve openings may have polygonal cross-sections.
[0028] The shape of the magnetic core body includes, but is not limited to, one or more of the following: toroidal, can-shaped, E-type, EC-type, or PQ-type. Specifically, when there is one magnetic core body, its shape can be, but is not limited to, one of the following: toroidal, can-shaped, E-type, EC-type, or PQ-type; when there are two or more magnetic core bodies, some of the magnetic core bodies can be, but is not limited to, one of the following: toroidal, can-shaped, E-type, EC-type, or PQ-type, and some of the magnetic core bodies can be, but is not limited to, another of the following: toroidal, can-shaped, E-type, EC-type, or PQ-type, that is, each magnetic core body can have a different shape.
[0029] The magnetic core body has at least one hollow sleeve inserted. When there are multiple magnetic core bodies, if only one or part of the magnetic core bodies have one or more hollow sleeves inserted, they should all be within the protection scope of this utility model.
[0030] The insertion method can be that a hollow sleeve is inserted into the hollow part of the magnetic core body. In the magnetic ring core body, the hollow part refers to the empty ring inside the magnetic core body. For magnetic core bodies with special shapes, such as E-type magnetic core bodies, the hollow part can refer to the part inside the two grooves of the E-type. The interpretation of the hollow part of other shaped magnetic core bodies is similar to that of the E-type magnetic core body.
[0031] like Figure 3 As shown, Figure 3 This is a schematic diagram of a structure in which a hollow sleeve is inserted into the magnetic core body. Figure 3 Both of the insertion methods involve hollow sleeves inserted into the hollow part of the magnetic core body. Placing several cylindrical sleeves inside the hollow part and fixing them together with the magnetic core body also belongs to the method of hollow sleeves inserted into the hollow part of the magnetic core body.
[0032] The insertion method can also be that the hollow sleeve is inserted on the outside of the magnetic core body. Here, the outside of the magnetic core body means the entire outside of the magnetic core body. For example, the magnetic core body is placed in a groove with a curved sleeve or a multi-segment sleeve, or several cylindrical sleeves are placed around the magnetic core body and fixed together with it. All of these belong to the method of inserting the hollow sleeve on the outside of the magnetic core body.
[0033] If there are two or more hollow sleeves, and each hollow sleeve is inserted into the magnetic core body in a different way, this should also be within the scope of protection of this utility model.
[0034] In some embodiments, the potted magnetic device further includes a housing, in which a potting medium encapsulates the magnetic core body and the hollow sleeve. The housing comprises one or more layers of a metal shell, a ceramic shell, or a plastic shell. For example, it may include a single aluminum shell, or a single aluminum shell and a single ceramic shell, with the ceramic shell inside the aluminum shell.
[0035] In some embodiments, such as Figure 4 As shown, Figure 4 This is a schematic diagram of several sizes of U-shaped bushings. The hollow bushing can be, but is not limited to, a curved bushing or a multi-segment bushing. The curved bushing can include, but is not limited to, U-shaped bushings or corrugated bushings. The connection method of the multi-segment bushings is not limited. The size of the U-shaped bushing, corrugated bushing, or multi-segment bushing can be adjusted according to the shape of the magnetic core body.
[0036] In some embodiments, at least one hollow sleeve is inserted into the magnetic core body in such a way that both arms of the curved sleeve or multi-segment sleeve are located within the hollow portion of the magnetic core body.
[0037] The hollow portion is explained in the same way as above, such as... Figure 3 The three magnetic core bodies on the right side are interspersed in such a way that the two arms of the U-shaped sleeve are both located in the hollow part of the magnetic core body. ∈ indicates that they belong to.
[0038] In some embodiments, at least one hollow sleeve is inserted into the magnetic core body in such a way that the two arms of the curved sleeve or the multi-segment sleeve are respectively located on both sides of the hollow portion of the magnetic core body.
[0039] The hollow portion is explained in the same way as above, such as... Figure 3 The two magnetic core bodies on the left side are interspersed in such a way that the two arms of the U-shaped sleeve are located on both sides of the hollow part of the magnetic core body. ∈ indicates that it belongs to.
[0040] In addition, the magnetic core body is located in the groove of the curved sleeve or multi-segment sleeve, and the outer side of the magnetic core body is in contact with the groove. The hollow sleeve is inserted in such a way that the two tube arms of the curved sleeve or multi-segment sleeve are located on both sides of the hollow part of the magnetic core body.
[0041] In some embodiments, the hollow sleeve is a cylindrical sleeve.
[0042] In some embodiments, the opening of the cylindrical sleeve buried in the potting medium is sealed.
[0043] In some embodiments, the hollow sleeve includes at least one flexible material layer. This flexible material layer may be, but is not limited to, a sealed pectin layer, a Teflon sleeve, a heat-shrink sleeve, a PVC (Polyvinyl Chloride) sleeve, or a silicone fiber sleeve.
[0044] Finally, it should be noted that this utility model has the following beneficial effects: By inserting a hollow sleeve into the magnetic core body, when the magnetic element is working and the temperature rises, the potting medium can reduce the expansion pressure of the potting medium on the magnetic core body by squeezing the hollow sleeve, which can effectively reduce the damage and cracking of the magnetic core body caused by the expansion of the potting medium.
[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A potted magnetic device that prevents cracking of a magnetic core, characterized by, The potting medium, the magnetic core body and at least one hollow sleeve, the potting medium integrates the magnetic core body and the hollow sleeve, the magnetic core body is inserted with at least one hollow sleeve; The hollow sleeve includes at least one port, the port is configured to allow the stress to be released through the hollow sleeve when the potting medium expands.
2. The potted magnetic device of claim 1, wherein, The hollow sleeve is a curved sleeve or a multi-section sleeve.
3. The potted magnetic device of claim 2, wherein, The magnetic core body is inserted with at least one hollow sleeve in a manner that both arms of the curved sleeve or the multi-section sleeve are located in the hollow part of the magnetic core body.
4. The potted magnetic device of claim 2, wherein, The magnetic core body is inserted with at least one hollow sleeve in a manner that both arms of the curved sleeve or the multi-section sleeve are located on both sides of the hollow part of the magnetic core body.
5. The potted magnetic device of claim 1, wherein, The hollow sleeve is a columnar sleeve.
6. The potted magnetic device of claim 5, wherein, The port of the columnar sleeve is closed in the potting medium.
7. The potted magnetic device of any of claims 1-6, wherein, The hollow sleeve includes at least one layer of flexible material.
8. The potted magnetic device of any of claims 1-6, wherein, The shape of the magnetic core body includes one or more of a ring type, a can type, an E type, an EC type or a PQ type.
9. The potted magnetic device of any of claims 1-6, wherein, Each of the hollow sleeves has at least one port which is flush with or exceeds the surface of the potting medium.
10. The potted magnetic device of any of claims 1-6, wherein, The potted magnetic device further includes a shell, the potting medium integrates the magnetic core body and the hollow sleeve in the shell, and the shell includes one or more of a metal shell, a ceramic shell or a plastic shell.