High-frequency high-voltage ferrite core, rectifier and rectification system
By decomposing high-frequency, high-voltage ferrite cores into small-sized core modules and bonding them together, the problems of high production costs and material instability of large-sized cores are solved, achieving efficient current output and material stability, making it suitable for high-frequency, high-voltage, and high-power power supply applications.
Patent Information
- Application Number
- CN202420803747.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-04-16
AI Technical Summary
High-frequency high-voltage ferrite cores require larger effective core cross-sections and larger window sizes in high-power power supply applications, which leads to increased production costs, reduced high-temperature sintering yield, and unstable and inconsistent material properties.
Multiple small-sized magnetic core modules are bonded together to form a large-sized high-frequency high-voltage ferrite core. Insulating adhesive is used to bond the magnetic core components, reducing reliance on large molds and equipment and improving the yield of high-temperature sintering and material stability.
It reduces production costs, improves the stability and consistency of material properties of high-frequency high-voltage ferrite cores, enhances current output capability, and meets the needs of high-power power supplies.
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Figure CN223526951U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of magnetic elements, in particular to a high-frequency high-voltage ferrite core, a rectifier and a rectification system. BACKGROUND
[0002] With the development of high-power semiconductor device technology and the increasing maturity of application, the reduction of switching loss of semiconductor devices, and the high frequency of high-power power supply inverter circuit, which is generally above several ten thousand hertz. In the field of special high voltage, high-frequency high-voltage ferrite cores not only need to be wound with larger cross-section wires in the effective window, but also need to meet the insulation distance requirement under high voltage. Therefore, in the field of high-frequency high-voltage high-power power supply, high-frequency high-voltage ferrite cores need larger effective core cross-section and larger core window size.
[0003] In order to prepare a high-frequency high-voltage ferrite core with larger cross-section and larger window size, larger processing machine equipment and larger manufacturing mold are needed, which increases the production and processing cost. At the same time, the yield of high-frequency high-voltage ferrite cores with large cross-section and large window size is reduced, the waste is increased, and the material properties of the high-frequency high-voltage ferrite core become unstable and the consistency becomes poor. CONTENT OF THE INVENTION
[0004] Therefore, the purpose of the application is to provide a high-frequency high-voltage ferrite core, a rectifier and a rectification system.
[0005] In a first aspect, the application provides a high-frequency high-voltage ferrite core, which comprises: at least two core assemblies connected by bonding; each core assembly comprises at least one core module.
[0006] In combination with the first aspect, the high-frequency high-voltage ferrite core comprises two first core assemblies and at least two second core assemblies, and the first core assembly and the second core assembly are connected by bonding with insulating glue.
[0007] In combination with the first aspect, the first core assembly comprises at least one first core module, and the first core module is in a U-shaped structure; the second core assembly comprises at least one second core module, and the second core module is in a cuboid or square structure.
[0008] In combination with the first aspect, the high-frequency high-voltage ferrite core comprises two first core assemblies and at least two second core assemblies; the two first core assemblies are oppositely arranged, and at least one second core assembly is bonded between the two first core assemblies.
[0009] In combination with the first aspect, the end face size of the first core assembly is the same as the end face size of the second core assembly.
[0010] In combination with the first aspect, the length of the second magnetic core module is 40-200mm.
[0011] In combination with the first aspect, the width of the first magnetic core module is 120-180mm, and the height is 120-200mm.
[0012] In combination with the second aspect, the high-frequency high-voltage ferrite magnetic core is wound with a wire package.
[0013] In combination with the second aspect, the high-frequency high-voltage ferrite magnetic core is wound with a wire package.
[0014] In combination with the third aspect, the rectifier system comprises the rectifier.
[0015] The high-frequency high-voltage ferrite magnetic core, the rectifier and the rectifier system provided by the application have the following beneficial effects: the high-frequency high-voltage ferrite magnetic core comprises: at least two magnetic core assemblies connected by bonding.
[0016] The high-frequency high-voltage ferrite magnetic core provided by the application comprises at least two magnetic core assemblies, which are assembled into a large-size high-frequency high-voltage ferrite magnetic core by bonding a plurality of small-size magnetic core modules.
[0017] Other features and advantages of the present application will be described in the following description, and some of them will become apparent from the description, or will be understood by those skilled in the art through implementation of the present application.
[0018] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description.
[0020] Figure 1 The structure diagram of a first magnetic core assembly provided by the embodiments of the present application is shown.
[0021] Figure 2 Another structural schematic view of a first magnetic core assembly provided by an embodiment of the present application is shown in FIG. 1B.
[0022] Figure 3 A structural schematic view of a second magnetic core assembly provided by an embodiment of the present application is shown in FIG. 2A.
[0023] Figure 4 Another structural schematic view of a second magnetic core assembly provided by an embodiment of the present application is shown in FIG. 2B.
[0024] Figure 5 A structural schematic view of a high-frequency high-voltage ferrite core provided by an embodiment of the present application is shown in FIG. 3A.
[0025] Figure 6 Another structural schematic view of a high-frequency high-voltage ferrite core provided by an embodiment of the present application is shown in FIG. 3B.
[0026] The reference signs are as follows:
[0027] 1 - first magnetic core assembly, 11 - first magnetic core module, 2 - second magnetic core assembly, 21 - second magnetic core module. DETAILED DESCRIPTION
[0028] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be described below in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.
[0029] In order to facilitate the understanding of the embodiments, the technology involved in the present application will be briefly introduced first.
[0030] Ferrite is a non-metallic magnetic material, which is prepared by sintering iron trioxide and other metal oxides (such as nickel oxide, zinc oxide, manganese oxide, etc.). The production process of ferrite is similar to that of ceramics, and it is also called magnetic porcelain.
[0031] The working frequency of ferrite is between several kilohertz and several hundred megahertz. The core material has a very high resistivity, which can effectively suppress eddy current and is very suitable for high-frequency applications of power supply.
[0032] After introducing the technical terms involved in the present application, the application scenarios and design ideas of the embodiments of the present application will be briefly introduced.
[0033] With the increase of power supply power, the high-frequency high-voltage ferrite core needs a larger effective cross section, and in the effective window, a coil is wound with a wire with a larger cross section to achieve a higher current output under the same output voltage, thereby meeting the output requirement of the high-power power supply.
[0034] Based on this, the embodiment of the application provides a high-frequency high-voltage ferrite core.
[0035] Embodiment 1
[0036] The application provides a high-frequency high-voltage ferrite core, which comprises at least two core assemblies connected by bonding.
[0037] The high-frequency high-voltage ferrite core provided by the application is obtained by bonding at least two core assemblies. The core assembly or the core module constituting the core assembly is regarded as a standard part. A large-volume high-frequency high-voltage ferrite core is assembled by bonding a plurality of standard parts. In this way, a plurality of small cross-section size core high-temperature sintering good products with stable and consistent core material properties can be obtained, so that a large cross-section size high-frequency high-voltage ferrite core with stable performance can be obtained.
[0038] It can be understood that the high-frequency high-voltage ferrite core with a larger effective cross section is obtained by increasing the number of core assemblies. In this way, in the effective window, a coil is wound with a wire with a larger cross section to achieve a higher current output under the same output voltage, thereby meeting the output requirement of the high-power power supply.
[0039] In the field of special high voltage, the high-frequency high-voltage ferrite core not only needs to be wound with a wire with a larger cross section in the effective window, but also needs to meet the insulation distance requirement under high voltage. At this time, the number of core assemblies or core modules in the insulation distance direction can be increased to meet the insulation distance requirement under high voltage.
[0040] In summary, in the field of high-frequency high-voltage high-power power supply, high-frequency high-voltage ferrite cores require large core cross sections and larger core window sizes, which require larger molds and processing equipment in the production and processing process, increasing production costs. At the same time, high-frequency high-voltage ferrite cores with large cross sections and large window sizes have low good product rates for high-temperature sintering, and the material properties of the prepared high-frequency high-voltage ferrite cores are unstable and have poor consistency, resulting in increased waste and waste of raw materials. The high-frequency high-voltage ferrite core provided in the present application is modularized by bonding the core components or core modules that make up the high-frequency high-voltage ferrite core after being decomposed into multiple standard parts. The standard parts of different sizes are processed and prepared respectively in the processing and preparation process, the required molds and equipment have small volumes, and the good product rate of the standard parts prepared by high-temperature sintering is high and the material properties are stable. Therefore, the production cost is reduced and the material properties of the high-frequency high-voltage ferrite core are stable.
[0041] In combination with the first aspect, the high-frequency high-voltage ferrite core comprises two first core components 1 and at least two second core components 2, and the first core components 1 and the second core components 2 are connected by adhesive bonding. It can be understood that the two second core components 2 to be connected are also connected by adhesive bonding.
[0042] The bonding of the core is usually bonded by an adhesive, and in the present embodiment, the adhesive is insulating glue. There are two common methods of glue bonding, the first method is to bond by two-component epoxy resin glue, the specific steps are: mix A component and B component in a certain proportion and stir uniformly; wipe the glue surface (the adjacent surface of the two core modules, the adjacent surface of the two adjacent core components) clean to ensure that there is no impurity; then apply the mixed two-component epoxy resin glue to the glue surface; press firmly to ensure uniform distribution of the glue; wait for the glue to dry, and the bonding is completed. The second method is to bond by silicone glue, the specific steps are: apply silicone glue to the glue surface, the thickness is generally 0.2-0.5mm; press firmly to ensure uniform distribution of the glue in the glue surface; then, wait for the glue to dry, and the bonding is completed.
[0043] In combination with the first aspect, the first core component 1 comprises at least one first core module 11, and the first core module 11 is in a U-shaped structure.
[0044] In combination with the first aspect, Figure 1 The first core component 1 shown in the figure comprises two first core modules 11, and the first core modules 11 are in a U-shaped structure. After the two first core modules 11 are bonded with the end surfaces aligned in the first direction, a first core component 1 with a larger cross-sectional size is obtained.
[0045] As another implementable manner, in combination with the first aspect, Figure 2As shown, the first magnetic core assembly 1 includes four first magnetic core modules 11, which are divided into two groups, two first magnetic core modules 11 in each group are placed side by side and bonded, and after bonding the two groups, the first magnetic core assembly 1 with an E-shaped structure is formed.
[0046] In combination with the first aspect, the second magnetic core assembly 2 includes at least one second magnetic core module 21, and the second magnetic core module 21 has a cuboid or square structure.
[0047] In combination with Figure 3 As shown, the second magnetic core assembly 2 includes two second magnetic core modules 21, and the two cuboid-shaped second magnetic core modules 21 are arranged adjacent to each other and bonded, thereby forming a new cuboid-shaped second magnetic core assembly 2, and the cross section of the second magnetic core assembly 2 is a rectangle.
[0048] In combination with Figure 4 As shown, the second magnetic core assembly 2 includes four second magnetic core modules 21, and two second magnetic core modules 21 are divided into two groups, two second magnetic core modules 21 in each group are arranged adjacent to each other along a first direction and bonded, and then the two groups are arranged adjacent to each other along a second direction perpendicular to the first direction and bonded, thereby obtaining a second magnetic core assembly 2 with a square cross section, and the first direction and the second direction are in the same horizontal plane.
[0049] It can be understood that by increasing the number of magnetic core modules and changing the arrangement position of the magnetic core modules, different structures of the magnetic core assembly can be obtained, and by stacking two or more magnetic core assemblies, different high-frequency high-voltage ferrite magnetic cores can be obtained.
[0050] In combination with the first aspect, the high-frequency high-voltage ferrite magnetic core includes two first magnetic core assemblies and at least one second magnetic core assembly; the two first magnetic core assemblies are arranged opposite to each other, and the at least one second magnetic core assembly is bonded between the two first magnetic core assemblies.
[0051] In combination with Figure 5 As shown, the high-frequency high-voltage ferrite magnetic core includes two first magnetic core assemblies 1 and two second magnetic core assemblies 2, wherein each first magnetic core assembly 1 includes two first magnetic core modules 11 with a U-shaped structure, and each second magnetic core assembly 2 includes two second magnetic core modules 21 with a cuboid structure, that is, the high-frequency high-voltage ferrite magnetic core provided in this embodiment includes four first magnetic core modules 11 and two second magnetic core modules 21. The two first magnetic core assemblies 1 are arranged opposite to each other, and the second magnetic core assembly 2 is connected between the two first magnetic core assemblies 1. Since the first magnetic core assembly 1 has a U-shaped structure, the second magnetic core assembly 2 is at least two, and after bonding, the high-frequency high-voltage ferrite magnetic core with a mouth-shaped structure is formed, which is suitable for the application scenario of winding coils on both sides of the magnetic column.
[0052] In combination with Figure 6The shown high-frequency high-voltage ferrite core includes two first core assemblies 1 and a plurality of second core assemblies 2, wherein the first core assembly 1 is an E-shaped structure formed by bonding four U-shaped first core modules 11, and specifically, two U-shaped first core modules 11 are adjacently arranged and bonded in a first direction (the length direction shown in the figure) to form a first sub-core assembly of an E-shaped structure, and another two U-shaped first core modules 11 are bonded in the same way to form a second sub-core assembly of an E-shaped structure, and the two first core assemblies are bonded in a width direction to form the first core assembly 1 of an E-shaped structure.
[0053] As an implementable manner, the second core assembly 2 can be four, and the four second core assemblies 2 can be completely the same and each formed by bonding two second core modules 21.
[0054] As another implementable manner, the second core assembly 2 is three, wherein two second core assemblies 2 are completely the same and each formed by bonding two second core modules 21, and the other second core assembly 2 is formed by bonding four second core modules and has a square cross-section.
[0055] The high-frequency high-voltage ferrite core with the above structure is suitable for the application scenario of winding wire packages on the center magnetic column.
[0056] It can be understood that, on the basis of the above two manners, in order to increase the effective window of the high-frequency high-voltage ferrite core, the number of the second core assemblies 2 in a third direction (a direction perpendicular to the horizontal plane of the first direction and the second direction, i.e., the height direction shown in the figure) can be increased.
[0057] It can be understood that each second core module 21 can also be regarded as a second core assembly 2, and then bonded respectively, which is not described here.
[0058] In combination with the first aspect, the end face size of the first core module 11 is the same as the end face size of the second core module 21. The end face size refers to the length and width of the surface of the first core assembly 1 and the second core assembly 2.
[0059] The first core module 11 and the second core module 21 with the same cross-sectional size are bonded to obtain a high-frequency high-voltage ferrite core with clear and complete structure boundaries.
[0060] It can be understood that by bonding the high-frequency high-voltage ferrite core with large cross-section and large window size into small-size standard modules, high-frequency high-voltage ferrite cores with different structures and cross-section window sizes can be combined, the production cost can be reduced, the product performance stability and consistency are good, in addition, there is no need to store products of various specifications and models, which is beneficial to reduce the inventory cost, and the fixed small-size standard parts can be bonded and assembled, so that the customer's demand can be quickly met.
[0061] In the embodiment, the length of the second magnetic core module 21 is 40-200mm.
[0062] In the embodiment, the width of the first magnetic core module 11 is 120-180mm, and the height is 120-200mm.
[0063] In a second aspect, the application provides a rectifier comprising at least one high-frequency high-voltage ferrite core as described above, and a wire package wound on the side magnetic column or the center magnetic column of the high-frequency high-voltage ferrite core.
[0064] In a third aspect, the application provides a rectifier system comprising a rectifier as described above.
[0065] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the foregoing method embodiments, which will not be described here.
[0066] In addition, in the description of the embodiments of the application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.
[0067] In the description of the application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0068] Finally, it should be noted that the above examples are merely specific embodiments of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the same. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that, within the technical scope disclosed by the present application, any person skilled in the art can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A high frequency high voltage ferrite core, characterized by, The high-frequency high-voltage ferrite core comprises two first core assemblies and at least two second core assemblies connected by adhesive bonding; the first core assembly comprises at least one first core module, which is in a U-shaped structure; the second core assembly comprises at least one second core module, which is in a cuboid or square structure; the end face size of the first core assembly is the same as that of the second core assembly; the two first core assemblies are oppositely arranged, and at least one second core assembly is bonded between the two first core assemblies.
2. The high frequency high voltage ferrite core according to claim 1, characterized in that, The length of the second core module is 40-200 mm.
3. The high frequency high voltage ferrite core of claim 1, wherein, The width of the first core module is 120-180 mm, and the height is 120-200 mm.
4. A rectifier characterized by, The high-frequency high-voltage ferrite core comprises at least one high-frequency high-voltage ferrite core as claimed in any one of claims 1-3.
5. The rectifier of claim 4, wherein, The high-frequency high-voltage ferrite core is wound with a wire package.
6. A rectifying system characterized by, The rectifier comprises the high-frequency high-voltage ferrite core as claimed in claim 5.