Integrated magnetic device

Abstract

The utility model relates to the related technical field of transformers, inductors and mutual inductors, and provides an integrated magnetic device which comprises a plurality of magnetic cores arranged in a stacked mode and coils arranged on the magnetic cores, and the coils comprise resonant inductance coils and transformer coils. Each magnetic core is provided with a receding space matched with the corresponding coil, a magnetic core middle column is arranged in the center of each receding space, the magnetic core middle columns of all the magnetic cores are located on the same straight line after the multiple magnetic cores are arranged in a stacked mode, and the adjacent magnetic cores make contact with each other to form a closed magnetic loop; a coil is arranged in the receding space, and the coil is wound on the same plane with the same circle center to form a flattened winding structure. The transformer, the resonant inductor and the current transformer are integrated, and the size of the integrated device is minimized by adopting a flat design, so that the problems of large size, complex design and low reliability when a traditional circuit adopts a plurality of inductor devices are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, inductors and mutual inductance devices, and in particular to an integrated magnetic device. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] In everyday electronic circuits, a resonant circuit is one that consumes very little energy at a specific frequency while simultaneously achieving maximum voltage and current. Resonant inductors are a common component in circuits. They are designed and manufactured using the property of inductive impedance, which exhibits pure electrical impedance at resonance. They are primarily used to adjust the resonant frequency of a circuit and balance the current and voltage within the resonant circuit. Resonant inductors are widely used in circuits such as AC voltage regulators, bandpass filters, and RF preamplifiers, and are indispensable components in wireless communication circuits. The function of a current transformer is to convert a larger primary current into a smaller secondary current using a certain transformation ratio, which is then used for protection, measurement, and other purposes.

[0004] In existing electronic circuit designs, transformers, resonant inductors, and current transformers are widely used as independent components. In traditional circuit designs, these components are usually set up independently, leading to the following problems:

[0005] Large space occupation: Since these components exist independently, the space utilization efficiency of the entire circuit board is low, especially in occasions with strict requirements on device volume, such as portable devices and power modules, the restrictions on space design are more obvious.

[0006] High number of components: Each function is implemented by a separate component, which increases the number of components in the circuit design and increases the complexity of production and assembly.

[0007] Reduced overall reliability: The increase in the number of components increases circuit complexity, which may increase the probability of failure and reduce overall reliability. Utility Model Content

[0008] In order to solve the above problems, the utility model proposes an integrated magnetic device, which integrates a transformer, a resonant inductor and a current transformer, adopts a flat design, and minimizes the volume of the integrated transformer, resonant inductor and current transformer device, thereby solving the problems of large volume, complex design and low reliability when traditional circuits use multiple magnetic devices.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] One or more embodiments provide an integrated magnetic device, comprising a plurality of stacked magnetic cores and coils disposed on the magnetic cores, wherein the coils include a resonant inductor coil and a transformer coil;

[0011] Each magnetic core has a clearance space that matches the coil, and a core center column is provided at the center of the clearance space. When multiple magnetic cores are stacked, the core centers of all magnetic cores are in the same straight line, and adjacent magnetic cores contact each other to form a closed magnetic circuit.

[0012] A coil is arranged in the clearance space, and the coil is wound on the same plane with the same center to form a flattened winding structure.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The coils of the present invention are wound around the same level, which can reduce the coil height. The coils are stacked and assembled, thereby reducing the overall height of the product, which is conducive to the miniaturization of the device. The structure is also convenient and quick to assemble, which can greatly improve production efficiency. The coil winding method of this embodiment can form a flat structure, and the wound coils form concentric rings. The inductor coils using a flattened winding structure can greatly reduce the volume of the integrated inductor device, improve space utilization, and achieve a compact design; enhance the heat dissipation performance of the device. At the same time, winding the coils around the same level can reduce the parasitic capacitance between the coils, reducing losses in high-frequency applications, thereby improving the working efficiency and frequency response characteristics of the inductor.

[0015] The advantages of the present invention and additional advantages will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute a limitation of the present invention.

[0017] Figure 1 This is an exploded view of the structure of an integrated magnetic device according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic structural diagram of an integrated magnetic device after assembly according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic structural diagram of the transformer primary coil winding 5 according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic structural diagram of a transformer secondary coil winding 7 and a resonant inductor coil connected in series in an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the device constituting the transformer structure of an embodiment of the utility model;

[0022] FIG6 (a) is a schematic structural diagram of the bottom plate 4 and the magnetic core 1 after being assembled according to an embodiment of the present invention;

[0023] FIG6 (b) is an exploded view of the assembly structure of the bottom plate 4 and the magnetic core 1 of FIG6 (a) according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic structural diagram of the bottom plate 4 of an embodiment of the present utility model;

[0025] Figure 8 This is a schematic structural diagram of the metal outer shell 6 of an embodiment of the present utility model;

[0026] Figure 9 This is a schematic structural diagram of the integrated magnetic device according to an embodiment of the utility model after the metal outer shell 6 is provided;

[0027] Figure 10 This is a second perspective structural diagram of the integrated magnetic device according to an embodiment of the present invention after the metal outer shell 6 is provided.

[0028] Wherein: 1. Magnetic core, 2. Resonant inductor, 3. Current transformer, 4. Bottom plate, 5. Primary coil winding, 6. Metal shell, 7. Secondary coil winding;

[0029] 1-1, make way, 1-2, core center column;

[0030] 4-1, first slot, 4-2, terminal lead-out hole, 4-3, second slot, 4-4, ring plate, 4-5, reinforcement plate. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] In the technical solutions disclosed in one or more embodiments, Figures 1 to 10 As shown, an integrated magnetic device includes a plurality of stacked magnetic cores 1, each magnetic core 1 having a clearance space 1-1 matching a coil, a magnetic core center column 1-2 being located at the center of the clearance space 1-1. When the plurality of magnetic cores 1 are stacked, the magnetic core center columns 1-2 of all the magnetic cores 1 are aligned in a straight line, and adjacent magnetic cores 1 contact each other to form a closed magnetic circuit. Coils are disposed in the clearance spaces 1-1 of the stacked magnetic cores 1, and the coils are wound in the same plane and around the same center to form a flattened winding structure. The coils in the clearance spaces 1-1 include a resonant inductor coil and a transformer coil, and a current transformer is disposed at the coil output end.

[0035] The coils in this embodiment are wound around the same level, such as Figures 1 to 4 As shown, the coil height can be reduced and the coils can be stacked and assembled, which is beneficial to the miniaturization of the device. The structure assembly is convenient and quick, which can greatly improve the production efficiency.

[0036] The coil winding method of this embodiment can form a flattened structure, with the wound coils forming concentric rings. Using a coil with a flattened winding structure can significantly reduce the size of the integrated device, improve space utilization, and achieve a compact design. It also enhances the device's heat dissipation performance. The flattened structure increases the contact area between the coil and the surrounding air or heat sink, allowing heat to dissipate more quickly and preventing overheating within the coil, thereby improving the device's thermal management capabilities and operational stability. The flattened structure design can also reduce parasitic capacitance between the coils, lowering losses in high-frequency applications, thereby improving the inductor's operating efficiency and frequency response characteristics.

[0037] Specifically, the flattened winding structure is formed as follows Figure 3 and Figure 4 As shown, each coil after winding is in the same plane.

[0038] In a specific implementation structure, the magnetic core 1 adopts an E-shaped structure, with a magnetic core center column 1-2 arranged in the middle. The side walls on both sides of the magnetic core 1 and the magnetic core center column 1-2 form a clearance space 1-1, and the inner wall of the side wall is arc-shaped, which is adapted to the outer wall of the wound coil;

[0039] Optionally, the magnetic core 1 may be made of ferrite material;

[0040] In the above solution of this embodiment, any inductor device that uses a magnetic core and a coil structure and works on the principle of electromagnetic induction can be integrated. The number of stacked layers of the magnetic core 1 can be set as needed, and the number of coils can be set as needed.

[0041] Specifically, in this embodiment, a transformer and a resonant inductor are integrated, and the coils of the transformer and the resonant inductor are arranged layer by layer in the clearance space 1-1 after the magnetic core 1 is stacked;

[0042] Optionally, the resonant inductor 2 is electrically connected to the secondary coil winding 7 of the transformer to form a series structure;

[0043] Specifically, in this embodiment, a transformer is provided in the middle of the integrated device, such as Figure 5 As shown, the device comprises at least two magnetic cores 1, and the coil comprises a primary coil winding 5 and multiple secondary coil windings 7. The two magnetic cores 1 are arranged opposite each other, with the central core legs 1-2 in contact, and the side walls of the magnetic cores 1 also in contact, to form a closed magnetic circuit; the secondary coil windings 7 are arranged on both sides of the primary coil winding 5.

[0044] Specifically, the resonant inductor can be integrated on the top of the transformer, comprising a magnetic core 1 and a resonant inductor coil 2. The resonant inductor coil 2 is connected in series with one of the secondary coil windings 7 of the transformer. The magnetic core of the resonant inductor can be assembled on the top of the transformer, sharing the middle magnetic core part with the transformer, and contacting each other to form a closed magnetic circuit.

[0045] As a further technical solution, a current transformer 3 is provided at the output terminal of the resonant inductor 2 or the secondary coil winding 7 of the transformer;

[0046] In this embodiment, the transformer, resonant inductor and current transformer are integrated together, and the device is manufactured using a flat process, which can provide a flat, highly integrated transformer with a resonant inductor and a current transformer, reduce the number of components in the circuit, and miniaturize the power supply as a whole.

[0047] In a feasible structure, the current transformer 3 comprises a magnetic ring closed in a circular shape, with a winding arranged on the magnetic ring;

[0048] In this embodiment, the current transformer 3 is installed at the pin of the secondary coil winding 7 of the transformer, and mutually inductively senses the pin of the secondary coil winding 7, converting a current with a larger value into a secondary current with a smaller value through a certain transformation ratio. It can be used to measure the output current of the transformer and realize measurement, performance monitoring and protection of the device.

[0049] In some embodiments, a bottom plate 4 is further included, and the bottom plate 4 can be arranged between the two magnetic cores 1. The structure of the bottom plate 4 can be as follows: Figure 7 As shown, it includes an annular plate 4-4, with mounting plates extending from both ends of the annular plate 4-4, and terminal lead holes 4-2 are provided on the mounting plates; the structure of the annular plate 4-4 is adapted to the structure of the clearance space 1-1, so that the bottom plate 4 can be set on the magnetic core 1, and the through hole in the middle of the annular plate 4-4 matches the size and shape of the magnetic core center column 1-2 of the magnetic core 1;

[0050] Optionally, a first slot 4-1 is further provided on the base plate 4. The inner wall of the first slot 4-1 is rectangular in shape and its length is greater than the diameter of the current transformer 3, and is used to fix the current transformer 3. The base plate 4 provided in this embodiment can vertically set a circular-shaped current transformer 3 to achieve stable placement of the current transformer 3.

[0051] Furthermore, the thickness of the mounting plate matches the thickness of the magnetic core 1, so that after the bottom plate 4 is mounted on the magnetic core 1 through the magnetic core center column 1-2, the bottom surface of the magnetic core 1 is flush with the bottom surface of the mounting plate;

[0052] Optionally, a second slot 4-3 is provided on the mounting plate;

[0053] The second slot 4-3 is provided to effectively reduce the material consumption of the components, improve the economic efficiency of manufacturing, and reduce the weight of the entire device without affecting the structural strength and function;

[0054] The size and shape of the second slot 4 - 3 are not limited and can be set in an idle area, which is a position that does not affect the installation of the bottom plate 4 and the magnetic core 1;

[0055] Furthermore, one or more reinforcing plates 4-5 are provided at the side plates around the second slot 4-3, and two adjacent surfaces of the reinforcing plates 4-5 are fixedly connected to the bottom surface of the second slot 4-3 and the side plates respectively to improve the stability of the mounting plate structure.

[0056] Furthermore, it also includes a metal outer shell 6, which is a structure in which two quadrilateral frame shells are cross-nested and sleeved around the periphery of the product to prevent electromagnetic interference generated when the product is working from radiating outward and shielding external electromagnetic radiation interference;

[0057] This embodiment integrates the transformer with the resonant inductor and the current transformer, resulting in a compact and flat structure, miniaturized volume, and convenient and quick modular assembly, which can greatly improve production efficiency.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0059] Although the above description of the specific implementation methods of the present invention is combined with the accompanying drawings, it does not limit the scope of protection of the present invention. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present invention.

Claims

1. An integrated magnetic device, characterized in that: The device comprises a plurality of stacked magnetic cores and coils arranged on the magnetic cores, wherein the coils include a resonant inductor coil and a transformer coil; Each magnetic core has a clearance space that matches the coil, and a core center column is located in the center of the clearance space. When multiple magnetic cores are stacked, the core centers of all magnetic cores are in the same straight line, and adjacent magnetic cores contact each other to form a closed magnetic circuit. A coil is arranged in the clearance space, and the coil is wound on the same plane with the same center to form a flattened winding structure.

2. The integrated magnetic device according to claim 1, wherein: The magnetic core adopts an E-shaped structure, with a core center column in the middle. The side walls on both sides of the magnetic core and the core center column form a space, and the inner wall of the side wall is arc-shaped, which is compatible with the outer wall of the coil.

3. The integrated magnetic device according to claim 1, wherein: The coils of the transformer and the resonant inductor are arranged layer by layer in the space between the laminated magnetic cores.

4. The integrated magnetic device according to claim 1, wherein: The coil of the resonant inductor is electrically connected to the secondary coil of the transformer to form a series structure.

5. The integrated magnetic device according to claim 1, wherein: A current transformer is provided at the output terminal of the resonant inductor or the secondary coil winding of the transformer.

6. The integrated magnetic device according to claim 5, wherein: The current transformer includes a magnetic ring closed in a circular shape, with a winding arranged on the magnetic ring.

7. The integrated magnetic device according to claim 1, wherein: A bottom plate is also provided, the bottom plate body is flat, and the bottom plate is provided between the magnetic cores; The base plate includes an annular plate, with mounting plates extending from both ends of the annular plate, and terminal lead holes set on the mounting plates; the structure of the annular plate is adapted to the structure of the clearance space, and the through hole in the middle of the annular plate matches the size and shape of the core center column of the magnetic core.

8. The integrated magnetic device according to claim 7, wherein: A first slot is provided on the bottom plate for fixing the current transformer; the inner wall of the first slot is in the shape of a rectangle, and the length thereof is greater than the diameter of the current transformer.

9. The integrated magnetic device according to claim 7, wherein: A second slot is provided in the vacant area of ​​the mounting plate.

10. The integrated magnetic device according to claim 9, wherein: One or more reinforcing plates are provided on the side plates around the second slot, and two adjacent surfaces of the reinforcing plates are fixedly connected to the bottom surface of the second slot and the side plates respectively.

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