A skeleton-free segmented magnetic integrated core

Abstract

The utility model belongs to the technical field of electrical system passive device, concretely relates to a skeletonless sectional type magnetic integrated core. Skeletonless sectional type magnetic integrated core has the magnetic core, the magnetic core is the cylindrical structure that four arc supports that are along the circumference are uniformly distributed constitute, four arc supports are provided with the middle column that is connected in the connecting surface inner wall surface, at least one group arc magnetic core is arranged between two magnetic cores, the both ends of arc magnetic core have air gap I for placing insulating paper between two corresponding arc supports, every group arc magnetic core is provided with the square column type magnetic core, square column type magnetic core has air gap II for placing insulating paper between the middle column. The utility model effectively reduces the size of the magnetic core, integrates multiple magnetic devices on a magnetic core, the setting of distributed multi-section air gap significantly reduces the overall permeability of the magnetic circuit, and effectively solves the problem of excessive height size of the magnetic core in the prior art.

Description

Technical Field

[0001] This utility model belongs to the technical field of passive components in electrical systems, and specifically relates to a frameless segmented magnetic integrated core. Background Technology

[0002] Currently, mainstream magnetic core styles such as EI, Ui, UU, and toroidal types are widely used in the field of electronic device technology. Although these traditional magnetic core styles have simple structures and mature manufacturing processes, they have certain special size limitations, which restrict the further miniaturization and high integration of electronic devices. In order to reduce the size of magnetic components and improve the utilization rate of module circuit boards, multiple magnetic components are usually integrated to form planar magnetic components. However, the integration of multiple magnetic components will lead to poor heat dissipation, affecting the lifespan and safety of the magnetic components.

[0003] CN114050026A discloses a magnetic component, its manufacturing method, power module, and switching power supply. The magnetic component in this document includes at least two X-type magnetic cores and at least one I-type magnetic core. The X-type magnetic cores are provided with windings, and the at least two X-type magnetic cores and the at least one I-type magnetic core form a closed magnetic circuit. This application solves the problem of poor heat dissipation after integrating multiple magnetic components. However, in this document, the height of each X-type magnetic core is fixed, and its air gap length is fixed. Each additional air gap requires additional windings. Essentially, it increases the number of air gaps by increasing the number of X-type windings, which cannot be freely arranged and combined. Utility Model Content

[0004] The purpose of this invention is to propose a frameless segmented magnetic integrated core, which can effectively reduce the height of the core and provide a new technical path for the miniaturization and high integration of electronic devices. By optimizing the core structure, magnetic devices can be magnetically integrated into the structure, effectively improving filtering and common-mode interference resistance, three-phase imbalance, and DC bias suppression capability, while also reducing product size and weight, thereby reducing overall cost.

[0005] To achieve the above objectives, this utility model adopts the following technical solution:

[0006] A frameless segmented magnetic integrated core includes a magnetic core; the magnetic core is a cylindrical structure composed of four arc-shaped pillars evenly distributed along the circumference, with a notch between each pair of adjacent arc-shaped pillars; one end of each of the four arc-shaped pillars is suspended, and the other ends extend inward and connect to form a connecting surface with four grooves; a central pillar is disposed within each of the four arc-shaped pillars and connected to the inner wall of the connecting surface; the central pillar is a cylinder, and an annular cavity for placing windings is formed between the central pillar and the circle formed by the four arc-shaped pillars; there are two magnetic cores; the connecting surfaces of the two magnetic cores are arranged opposite each other; at least one set of arc-shaped magnetic cores is disposed between the two magnetic cores; each set of arc-shaped magnetic cores consists of four arc-shaped magnetic cores evenly distributed along the circumference. Each of the aforementioned arc-shaped magnetic cores is located between two corresponding arc-shaped pillars of the magnetic cores. Each end of the arc-shaped magnetic core has an air gap I between it and its corresponding arc-shaped pillar for placing insulating paper. A square-column magnetic core is provided between each group of arc-shaped magnetic cores. An annular cavity for placing the winding is provided between the square-column magnetic core and its corresponding group of arc-shaped magnetic cores. The square-column magnetic core is coaxially arranged with the central pillar, and an air gap II for placing insulating paper is provided between the square-column magnetic core and the central pillar. The center of both the square-column magnetic core and the central pillar has a heat dissipation hole for installing a cooling water pipe, thereby increasing the heat dissipation area of ​​the magnetic core. The heat dissipation hole penetrates the connection surface of the two magnetic cores. The spaced arrangement of air gaps I and II constitutes a distributed multi-segment gap.

[0007] The frameless segmented magnetic integrated core is at least one.

[0008] The thickness of the insulating paper is no more than 2mm. The size of the air gap can be adjusted by adjusting the thickness of the insulating paper.

[0009] This invention proposes a frameless segmented magnetic integrated core. The core adopts a unique cylindrical split structure design, which effectively reduces the core size and is distinct from existing mainstream core styles, providing a new technical path for the miniaturization and high integration of electronic devices. The cylindrical core integrates multiple magnetic devices onto a single core through magnetic integration technology. The distributed multi-segment air gap significantly reduces the overall permeability of the magnetic circuit. In magnetic integrated devices, multi-segment air gaps (distributed air gaps) have significant advantages over single concentrated air gaps, especially in reducing leakage flux, optimizing magnetic performance, and improving device efficiency. This core design is innovative and offers flexible combination options, effectively solving the problem of excessively large core height in existing technologies, and providing new technical support for the miniaturization and high integration of electronic devices. Attached Figure Description

[0010] Figure 1 This is a perspective view of magnetic core I in this utility model.

[0011] Figure 2 This is a perspective view of the arc-shaped magnetic core in this utility model.

[0012] Figure 3 This is a perspective view of magnetic core II in this utility model.

[0013] Figure 4 This is a diagram showing the combined state of this utility model.

[0014] Figure 5 This is a three-dimensional view of the combined state of this utility model.

[0015] Figure 6 This is a perspective view of the utility model in use.

[0016] In the diagram: 1. Magnetic core, 1-1. Arc-shaped support, 1-2. Air gap I, 1-3. Middle column, 2. Arc-shaped magnetic core, 2-1. Air gap II, 3. Square column magnetic core, 4. Heat dissipation hole, 5. Primary winding, 6. Secondary winding. Detailed Implementation

[0017] The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:

[0018] A frameless segmented magnetic integrated core, comprising a core 1; combined with Figure 1The magnetic core 1 is a cylindrical structure composed of four arc-shaped pillars 1-1 evenly distributed along the circumference, and each pair of adjacent arc-shaped pillars 1-1 has a notch; one end of each of the four arc-shaped pillars 1-1 is suspended, and the other end extends inward and connects to form a connecting surface with four grooves; a central pillar 1-3 is provided inside the four arc-shaped pillars 1-1 and connected to the inner wall of the connecting surface; the central pillar 1-3 is a cylinder, and an annular cavity for placing the winding is formed between the central pillar 1-3 and the circle formed by the four arc-shaped pillars 1-1; there are two magnetic cores 1; the connecting surfaces of the two magnetic cores 1 are arranged opposite each other; at least one set of arc-shaped magnetic cores 2 is provided between the two magnetic cores 1; each set of arc-shaped magnetic cores 2 consists of four evenly distributed along the circumference; each arc-shaped magnetic core 2 is located on the arc-shaped pillars corresponding to the two magnetic cores 1. Between pillars 1-1; the two ends of the arc-shaped magnetic core 2 are respectively connected to the two corresponding arc-shaped pillars 1-1 with air gaps I1-2 for placing insulating paper; a square column magnetic core 3 is provided between each group of arc-shaped magnetic cores; an annular cavity for placing windings is provided between the square column magnetic core 3 and the corresponding group of arc-shaped magnetic cores 2; the square column magnetic core 3 is coaxially arranged with the middle pillar 1-3, and an air gap II2-1 for placing insulating paper is provided between the square column magnetic core 3 and the middle pillar 1-3; the center of the square column magnetic core 3 and the middle pillar 1-3 are provided with heat dissipation holes 4 for installing cooling water pipes to increase the heat dissipation area of ​​the magnetic core; the heat dissipation holes penetrate the connection surface of the two magnetic cores; the spaced arrangement of air gaps I1-2 and air gaps II2-1 constitutes a distributed multi-segment gap; the air gaps are used to prevent the saturation of the entire magnetic integrated device.

[0019] The frameless segmented magnetic integrated core is at least one.

[0020] The thickness of the insulating paper is no more than 2mm. The size of the air gap can be adjusted by adjusting the thickness of the insulating paper.

[0021] The magnetic core 1, the square columnar magnetic core 3, and the arc-shaped magnetic core 2 are arranged in a left-right layered distribution structure. Two or more of them can be combined to provide windings for different windings, thus integrating the originally discrete magnetic devices together.

[0022] In use, the magnetic core 1 can be wound with a primary winding 5 and a secondary winding 6, while the arc-shaped magnetic core 2 can be wound with a second winding. The primary and second windings can be single-coil windings, such as filter inductor windings, energy storage inductor windings, or differential-mode inductor windings; they can also be double-coil or triple-coil windings, such as common-mode inductor windings or transformer windings. This allows for flexible combinations to save space and protect the coils. Furthermore, circuits connected in the same manner can be added to the cylindrical magnetic core to form an N-phase magnetic integrated device. Figure 6 As shown.

Claims

1. A frameless segmented magnetic integrated core, characterized in that: The frameless segmented integrated magnetic core has a magnetic core; the magnetic core is a cylindrical structure composed of four arc-shaped pillars evenly distributed along the circumference, and there is a notch between each two adjacent arc-shaped pillars; one end of each of the four arc-shaped pillars is suspended, and the other end extends inward and connects to form a connecting surface with four grooves; a central pillar is provided inside the four arc-shaped pillars and connected to the inner wall of the connecting surface; the central pillar is a cylinder, and an annular cavity for placing the winding is formed between the central pillar and the circle formed by the four arc-shaped pillars; there are two magnetic cores; the connecting surfaces of the two magnetic cores are arranged opposite each other; at least one set of arc-shaped magnetic cores is provided between the two magnetic cores; each set of arc-shaped magnetic cores consists of four evenly distributed along the circumference. Each of the aforementioned arc-shaped magnetic cores is located between two corresponding arc-shaped pillars of the magnetic cores. Each end of the arc-shaped magnetic core has an air gap I between it and its corresponding arc-shaped pillar for placing insulating paper. A square-column magnetic core is provided between each group of arc-shaped magnetic cores. An annular cavity for placing windings is provided between the square-column magnetic core and its corresponding arc-shaped magnetic core. The square-column magnetic core is coaxially arranged with the central pillar, and an air gap II for placing insulating paper is provided between the square-column magnetic core and the central pillar. Both the square-column magnetic core and the central pillar have heat dissipation holes at their centers for installing cooling water pipes. The heat dissipation holes penetrate the connecting surface of the two magnetic cores. The spaced arrangement of air gaps I and II constitutes a distributed multi-segment gap.

2. The frameless segmented magnetic integrated core as described in claim 1, characterized in that: The frameless segmented magnetic integrated core is at least one.

3. The frameless segmented magnetic integrated core as described in claim 1, characterized in that: The thickness of the insulating paper is no more than 2 mm.

Images