Magnetic element, power module and electronic device

Abstract

The embodiment of the application provides a kind of magnetic element, power module and electronic equipment, belong to electronic technical field, the magnetic element includes magnetic core and winding, part structure of winding is wound in the inside of magnetic core.The geometric configuration of magnetic core forms continuous magnetic conducting path, and the magnetic induction line generated when winding is energized forms closed magnetic circuit along magnetic conducting path.By setting the magnetic circuit to include first branch and second branch parallel to each other, and the material of the part of magnetic core passed by first branch and the part of magnetic core passed by second branch is respectively set as ferrite magnetic material and metal magnetic material, the magnetic core can simultaneously have the advantages of ferrite magnetic material and metal magnetic material, so that the magnetic element can have excellent magnetic performance in a wide frequency range.By setting the first branch and the second branch parallel to each other, the magnetic flux distribution can be optimized, the magnetic density distribution of the magnetic element at different positions is more uniform, the risk of local saturation is reduced, the efficiency is improved, and the loss is reduced.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a magnetic component, a power supply module, and an electronic device. Background Technology

[0002] In the field of power electronics technology, soft magnetic materials, as an energy storage carrier, are widely used in inductors or transformers of various voltage and current conversion circuits.

[0003] In circuit design, commonly used soft magnetic materials include ferrite magnetic materials and metallic magnetic materials. Ferrite magnetic materials are mainly composed of iron oxides and other metal oxides, and are typically ceramic materials. Ferrite magnetic materials have advantages such as high permeability, low loss, and good stability, but suffer from poor DC bias saturation. Metallic magnetic core materials in power electronics are generally made by mixing metal powder with other inorganic non-metallic elements through processes such as coating, pressing, annealing, and impregnation. They have distributed air gaps, low loss at high frequencies, and excellent DC bias resistance under high currents, but suffer from low permeability at high frequencies and high loss at low frequencies.

[0004] Therefore, there is an urgent need for a magnetic component that can exhibit good performance at both high and low frequencies. Summary of the Invention

[0005] This application provides a magnetic component, a power supply module, and an electronic device. The magnetic component exhibits good performance at both high and low frequencies.

[0006] A first aspect of this application provides a magnetic element, including a magnetic core and a winding, wherein at least a portion of the winding is arranged around at least a portion of the magnetic core. The geometry of the magnetic core forms a continuous magnetic conduction path, and the magnetic field lines generated when the winding is energized form a closed magnetic circuit along the magnetic conduction path. The magnetic circuit includes a first branch and a second branch connected in parallel. The portion of the magnetic core traversed by the first branch is made of either a ferrite magnetic material or a metallic magnetic material, and the portion of the magnetic core traversed by the second branch is made of either a ferrite magnetic material or a metallic magnetic material.

[0007] The magnetic element in this embodiment, through a parallel first and second branch in the magnetic circuit, can optimize the magnetic flux distribution and help balance the magnetic flux density of the magnetic element. This combined design provides greater flexibility, allowing the proportion and arrangement of materials to be adjusted according to the needs of specific applications to optimize performance. By rationally selecting and combining materials, a balance can be achieved between performance and cost, reducing the use of expensive materials while meeting performance requirements.

[0008] By using ferrite magnetic materials for the portions of the magnetic core traversed by the first branch and metallic magnetic materials for the portions traversed by the second branch, the magnetic component can possess the advantages of both materials, thus optimizing its performance. Ferrite magnetic materials typically exhibit lower losses at high frequencies, while metallic magnetic materials (such as metal powder cores) possess higher permeability and saturation flux density at low frequencies. Combining these two materials allows for effective performance over a wide frequency range.

[0009] In high-frequency applications, ferrites can reduce eddy current losses, while in low-frequency or high-flux-density applications, metallic magnetic materials can reduce hysteresis losses. This allows for maintaining low total losses and improving efficiency under different operating conditions.

[0010] Metallic magnetic materials typically have high saturation magnetic flux density and good resistance to DC bias, which means they can operate under higher magnetic field strengths without easily saturating. Combining them with ferrite magnetic materials can increase the saturation magnetic flux density of the entire magnetic component.

[0011] In addition, combinations of different materials can improve thermal management performance. Metallic magnetic materials generally have good thermal conductivity, which helps dissipate heat, while ferrite magnetic materials have stable magnetic properties at high temperatures.

[0012] In one possible implementation, the magnetic core includes a first magnetic core and a second magnetic core, with at least a portion of the winding structure surrounding at least a portion of the first magnetic core, and the second magnetic core being disposed on the surface of at least a portion of the first magnetic core. A second branch passes through the second magnetic core, and a first branch passes through a portion of the first magnetic core; the portion of the first magnetic core through which the first branch passes is made of either a ferrite magnetic material or a metallic magnetic material, and the second magnetic core is made of either a ferrite magnetic material or a metallic magnetic material.

[0013] By setting a second magnetic core on at least a portion of the surface of the first magnetic core, the magnetic circuit passing through the second magnetic core and a portion of the magnetic circuit passing through the first magnetic core can be connected in parallel, thereby forming a first branch and a second branch connected in parallel on the magnetic conduction path of the magnetic core. Moreover, this surface setting method is simple, reduces assembly difficulty, and thus saves costs.

[0014] In one possible implementation, the first magnetic core includes a core body and a winding portion. The winding portion is located within the core body, and the winding includes a coil that surrounds the winding portion. A second magnetic core is disposed on the surface of the core body, and / or, the second magnetic core is disposed on the surface of the winding portion.

[0015] By placing the winding section within the core body, space can be effectively utilized, making the entire first magnetic core more compact. This is beneficial for the miniaturization of magnetic components.

[0016] By placing the winding coils within the core body, some electromagnetic interference (EMI) can be shielded, thereby improving the electromagnetic compatibility of magnetic components. The partial enclosure of the windings within the core body provides additional mechanical support, reducing the risk of movement and damage under vibration or mechanical stress. Optimizing the winding arrangement can reduce parasitic inductance and capacitance effects, thus improving electrical performance (especially in high-frequency applications).

[0017] By placing the second magnetic core on the surface of the magnetic core body, and / or placing the second magnetic core on the surface of the winding section, the second magnetic core can be placed in different positions according to the needs of specific applications to meet different performance requirements, thereby improving the design flexibility of magnetic components.

[0018] In one possible implementation, the winding further includes leads connected to the coil. A lead outlet is provided on one side of the core body for the leads to pass through, extending from the lead outlet to the outside of the core body. At least a portion of the structure of the second core is attached to the outside of the lead outlet.

[0019] By designing an exit section, the winding leads can be more easily extended to the outside of the magnetic core, simplifying connections with other circuit components and reducing installation difficulty and maintenance complexity. By attaching at least a portion of the second magnetic core to the outside of the exit section, additional magnetic flux paths can be provided, helping to guide and concentrate the flux, thus improving magnetic circuit efficiency, reducing leakage flux, and enhancing overall magnetic performance. Placing the second magnetic core outside the exit section effectively shields against EMI, protects the winding leads, and improves the electromagnetic compatibility (EMC) of the magnetic components.

[0020] Adding a second magnetic core to the outside of the lead section increases the amount of magnetic material, thus reducing leakage inductance. This is especially important for applications requiring precise control of inductance values, such as high-frequency transformers and inductors. The physical presence of the second magnetic core provides additional mechanical protection for the lead section, reducing the impact of external environmental factors such as vibration, shock, or other mechanical stresses on the leads.

[0021] The second magnetic core helps dissipate heat, especially where heat may be generated at the wire exit points. It provides an additional heat conduction path, managing heat more effectively and preventing overheating. This design improves the overall structural integrity of the magnetic component, offering better mechanical stability and durability. Depending on the specific application requirements, the material and shape of the second magnetic core can be adjusted to optimize specific performance parameters, such as permeability and saturation flux density.

[0022] In one possible implementation, at least a portion of the structure of the second magnetic core is arranged circumferentially around the outside of the winding portion.

[0023] By arranging at least a portion of the second magnetic core around the winding portion, the coupling efficiency of the magnetic flux can be improved. This structure can improve the efficiency and performance of inductors or transformers by better guiding the magnetic flux. The second magnetic core surrounding the winding portion can effectively reduce leakage flux. This helps improve the device's EMC and reduce interference to surrounding circuits.

[0024] In addition, this configuration allows the magnetic circuit passing through the second magnetic core to be connected in parallel with the magnetic circuit passing through the winding section, which can optimize the magnetic flux distribution, help balance the magnetic flux density, make the magnetic flux density distribution at different positions of the magnetic element more uniform, reduce the risk of local saturation, improve the overall efficiency of the magnetic circuit, and reduce losses.

[0025] By incorporating a second magnetic core, the coverage area of ​​the core material can be increased, thereby improving the inductance value. This is particularly advantageous for applications requiring high inductance, such as filters and resonant circuits. The presence of a second magnetic core also provides an additional heat conduction path, allowing for more efficient heat management and preventing winding overheating. The second magnetic core surrounding the winding section provides additional mechanical protection, reducing the impact of external environmental factors such as vibration and mechanical stress on the winding.

[0026] In one possible implementation, at least a portion of the structure of the second magnetic core is attached to the surface of the magnetic core body in an area other than the wire-out portion.

[0027] By adding a second magnetic core to a specific area of ​​the main magnetic core, the magnetic flux path can be optimized, and the concentration and guidance of the magnetic flux can be enhanced, contributing to improved efficiency and performance of magnetic components. Increasing the coverage of the core material can increase the inductance value and maintain stable inductance characteristics under different operating conditions. The second magnetic core can aid in heat dissipation, especially in high-power applications. It provides an additional heat conduction path, allowing for more effective heat management and preventing overheating of the core and windings. The physical presence of the second magnetic core provides additional mechanical protection to the main magnetic core, reducing the impact of external environmental factors such as vibration and mechanical stress.

[0028] Furthermore, this configuration allows the magnetic circuit passing through the second magnetic core to be connected in parallel with the magnetic circuit passing through the portion of the first magnetic core that is in contact with the second magnetic core. This optimizes the magnetic flux distribution, helps balance the magnetic flux density, makes the magnetic flux density distribution more uniform across different locations of the magnetic element, reduces the risk of local saturation, improves the overall efficiency of the magnetic circuit, and reduces losses. Depending on the specific application requirements, the material and shape of the second magnetic core can be adjusted to meet different performance requirements, thereby increasing the design flexibility of the magnetic element.

[0029] In one possible implementation, the magnetic core body includes a first surface and a second surface that are opposite to each other. The first surface includes a first opening, and the second surface includes a second opening, which communicates with each other. At least one of the first opening and the second opening forms a lead-out portion. The second magnetic core includes a first magnet and a second magnet, with the first magnet attached to the outside of the first opening and the second magnet attached to the outside of the second opening.

[0030] By forming a connected first and second opening on the first and second surfaces of the magnetic core body, the arrangement and management of the winding leads can be simplified. This design allows the leads to pass through the interior of the first magnetic core, thereby reducing the complexity and length of the external leads. This design makes the entire magnetic component more compact, suitable for applications requiring space saving, such as miniaturized electronic devices.

[0031] By placing the first and second magnets on the outer sides of the opposing first and second openings, magnets can be placed on both symmetrical sides of the magnetic core. This achieves a more uniform magnetic field distribution, helping to reduce losses caused by magnetic field inhomogeneity and improving the overall performance of the device. Adding the first and second magnets to both sides of the first magnetic core effectively concentrates and guides the magnetic flux, improving the efficiency and performance of the magnetic components, reducing leakage flux, and enhancing flux concentration. This is particularly important for applications requiring precise control of inductance values ​​(such as high-frequency transformers and inductors).

[0032] In one possible implementation, the first magnetic core includes an E-type core and an I-type core. The E-type core includes a crossbeam, a center post, and side posts. One end of the center post is connected to the crossbeam, and the other end extends away from the crossbeam. One end of each side post is connected to the crossbeam, and the other end extends away from the crossbeam. There are two side posts, located at opposite ends of the crossbeam along a first direction, with the center post located between the two side posts. The I-type core is located at the ends of the center post and side posts away from the crossbeam. The crossbeam, side posts, and I-type core together form the core body. The core body has lead-out sections at both ends along a second direction, perpendicular to the first direction. The center post serves as the winding section.

[0033] The combination of E-type and I-type magnetic cores forms a closed magnetic circuit, which effectively guides and concentrates magnetic flux, reduces leakage flux, and improves the efficiency of the magnetic circuit. This closed magnetic circuit design helps reduce leakage inductance and parasitic capacitance effects, thereby improving electrical performance, especially in high-frequency applications. The structure of the E-type and I-type magnetic cores simplifies the assembly process; for example, an I-type core can be directly placed on the opening of an E-type core to form a complete magnetic circuit, reducing the need for complex assembly processes. This structure allows for better airflow and heat conduction, aiding in heat dissipation, especially in high-power applications, preventing overheating of the first core and windings.

[0034] In addition, this combined structure provides better mechanical stability. The side posts of the E-type core and the plane of the I-type core provide solid support, reducing the impact of vibration and mechanical stress on the first core. E-type and I-type cores are generally easy to manufacture and process, with high material utilization, which helps reduce production costs.

[0035] In one possible implementation, the first magnetic core is an EQI type magnetic core.

[0036] The EQI core design provides an efficient flux path, effectively guiding and concentrating flux, reducing leakage flux, and improving the efficiency of the magnetic circuit. EQI cores typically have a compact geometry, making them suitable for applications requiring space savings. This design helps reduce the overall size of the device, making it suitable for miniaturized electronic equipment. This structure provides good mechanical stability, reducing the effects of vibration and mechanical stress on the core, thereby improving device durability. This structure allows for better airflow and heat conduction, aiding in heat dissipation, especially in high-power applications, preventing overheating of the core and windings. The structural design of EQI cores generally simplifies the assembly process, is easy to manufacture and process, and has high material utilization, which helps reduce production costs. Additionally, it facilitates the installation of a second core, reducing assembly complexity.

[0037] In one possible implementation, the first magnetic core is made of a metallic magnetic material, and the second magnetic core is made of a ferrite magnetic material.

[0038] This configuration allows the larger first magnetic core to be made of a metallic magnetic material, while the smaller second magnetic core is made of a ferrite core. Since metallic magnetic materials typically have high saturation flux density, using a metallic magnetic material for the larger first core allows for better handling of high-current applications without saturation. Metallic cores generally exhibit lower losses in the low- and mid-frequency ranges. Therefore, a larger metallic core can effectively improve efficiency in these frequency ranges.

[0039] In one possible implementation, the first magnetic core is a metal powder core. Metal powder cores typically possess high mechanical strength and durability, capable of withstanding significant physical stress and vibration. The magnetic properties of metal powder cores can be customized by adjusting the alloy composition and powder particle size to meet specific application requirements. This flexibility makes them suitable for a wide variety of power electronic applications.

[0040] In one possible implementation, the winding is a flat enameled wire winding. The shape of the flat enameled wire allows it to be packed more tightly together, thus increasing the winding's fill factor. This means that more wire can be placed in the same winding space, increasing the winding's current carrying capacity. Since flat wire can utilize winding space more efficiently, it may reduce material usage, thereby lowering manufacturing costs. Due to its larger cross-sectional area, flat wire has a lower DC resistance compared to round wire. This helps reduce power losses and improve device efficiency. The larger surface area of ​​flat wire facilitates more effective heat dissipation, especially in high-power applications. This can lower the winding's operating temperature, improving device reliability and lifespan.

[0041] In one possible implementation, an adhesive layer is provided between the second magnetic core and the first magnetic core, with the second magnetic core fixedly connected to the first magnetic core via the adhesive layer. The adhesive layer provides a strong connection, allowing the second magnetic core to be securely attached to the first magnetic core. This reduces the risk of core displacement or loosening due to vibration or mechanical stress, improving the mechanical stability of the device. The adhesive layer acts as a damping and buffer, absorbing mechanical vibration and impact, thereby protecting both the first and second magnetic cores from external physical stress. This helps extend the lifespan of the magnetic components. Using an adhesive layer to fix the magnetic core simplifies the assembly process, reduces the need for mechanical fasteners (such as screws or clamps), and thus reduces production complexity and cost.

[0042] In one possible implementation, the adhesive layer material includes at least one of epoxy resin, polyurethane adhesive, silicone, acrylic adhesive, or inorganic adhesive.

[0043] In one possible implementation, the magnetic element is an inductor. This allows for performance improvements in several aspects of the inductor, particularly in applications requiring a balance between high-frequency and low-frequency characteristics, efficiency, and thermal management. This structure not only enhances the inductor's electrical performance but also strengthens its reliability and durability under various operating conditions.

[0044] A second aspect of the embodiments of this application provides a power module, including electrodes and magnetic elements as described above, wherein the windings of the magnetic elements are electrically connected to the electrodes.

[0045] The power module in this embodiment, by incorporating the magnetic element of the first aspect, enables the power module to possess excellent performance in both high-frequency and low-frequency environments. Since ferrite and metallic magnetic materials each exhibit superior performance across different frequency ranges, the power module using this magnetic element can achieve high efficiency over a wide frequency range. Metallic magnetic materials typically exhibit lower eddy current losses in high-frequency applications, while ferrite materials have higher permeability at low frequencies. Combining the two can effectively reduce overall system losses and improve the efficiency of the power module. Metallic magnetic materials typically have high saturation magnetic flux density, allowing the magnetic element to operate at high flux densities without saturation. This is a significant advantage for power modules that need to handle large currents.

[0046] By paralleling a portion of the magnetic circuit of the second magnetic core with that of the first, the magnetic circuit design can be optimized, improving flux utilization efficiency. This structure reduces core size and weight, enabling a more compact power module design. Ferrite materials are generally inexpensive; with proper design, material costs can be reduced while maintaining performance, resulting in a more cost-effective power module. The high permeability of ferrite materials helps shield and absorb electromagnetic interference, improving the electromagnetic compatibility of the power module.

[0047] A third aspect of this application provides an electronic device, including a wire and a magnetic element of any of the first aspects described above, wherein the winding of the magnetic element is electrically connected to the wire.

[0048] The electronic device in this embodiment, by incorporating a magnetic element that combines the advantages of ferrite and metallic magnetic materials, can optimize magnetic performance over a wide frequency range. This improves the overall efficiency of the electronic device. Metallic magnetic materials typically have high saturation magnetic flux density, allowing the magnetic element to operate at high flux densities without saturation. This enables the electronic device to handle larger power loads. By optimizing the magnetic circuit design and connecting a portion of the magnetic circuit of the second magnetic core in parallel with that of the first magnetic core, the utilization efficiency of the magnetic flux can be improved, thereby reducing the size and weight of the magnetic core and facilitating the miniaturization of the electronic device. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of a magnetic element provided in an embodiment of this application;

[0050] Figure 2 Schematic diagram of the loss and saturation characteristics of different soft magnetic materials;

[0051] Figure 3 This is a schematic diagram of the structure of a magnetic element in related technologies;

[0052] Figure 4 for Figure 1 A schematic diagram of the magnetic circuit of the magnetic core of the magnetic element shown;

[0053] Figure 5 This is a schematic diagram of the structure of the first magnetic core of the magnetic element in the embodiments of this application;

[0054] Figure 6 This is a schematic diagram of the spatial magnetic flux density distribution of the first magnetic core of the magnetic element in the embodiments of this application;

[0055] Figure 7 This is a schematic diagram of the spatial magnetic flux density distribution of the magnetic core of the magnetic element in the embodiments of this application;

[0056] Figure 8 This is a schematic diagram of the magnetic flux density distribution of the first core of the magnetic element in the embodiments of this application;

[0057] Figure 9 This is a schematic diagram of the magnetic flux density distribution of the magnetic core of the magnetic element in the embodiments of this application;

[0058] Figure 10 for Figure 1 A schematic diagram of the exploded structure of the magnetic component shown.

[0059] Figure 11 This is a schematic diagram comparing the efficiency of the magnetic components in the embodiments of this application and the magnetic elements in related technologies;

[0060] Figure 12 This is a schematic diagram comparing the unloaded inductance of the magnetic components in the embodiments of this application and the magnetic elements in related technologies;

[0061] Figure 13 This is a schematic diagram comparing the no-load loss of magnetic components in the embodiments of this application and magnetic elements in related technologies;

[0062] Figure 14 This is a schematic diagram comparing the inductance attenuation curves of the magnetic components in the embodiments of this application and the magnetic elements in related technologies;

[0063] Figure 15 A cross-sectional structural diagram of a magnetic element provided in an embodiment of this application;

[0064] Figure 16 A cross-sectional structural schematic diagram of another magnetic element provided in an embodiment of this application;

[0065] Figure 17 A cross-sectional structural schematic diagram of another magnetic element provided in an embodiment of this application;

[0066] Figure 18 A cross-sectional structural schematic diagram of the magnetic core of another magnetic element provided in an embodiment of this application;

[0067] Figure 19 for Figure 18 A cross-sectional view of the magnetic core of the magnetic element shown from another angle;

[0068] Figure 20 for Figure 18 The diagram shows the magnetic circuit of the magnetic core of the magnetic element shown.

[0069] Explanation of reference numerals in the attached figures:

[0070] 100. Magnetic components;

[0071] 10. Magnetic core;

[0072] 11. First magnetic core;

[0073] 111. Magnetic core body; 1111. First surface; 1112. Second surface; 1113. Third surface; 1114. Fourth surface;

[0074] 1115, Fifth side; 1116, Sixth side; 1117, First opening; 1118, Second opening;

[0075] 112. Cable exit section; 113. Cable winding section;

[0076] 114. Type E magnetic core; 1141. Crossbeam; 1142. Center post; 1143. Side post;

[0077] 115. Type I magnetic core;

[0078] 12. Second magnetic core;

[0079] 121. First magnet; 122. Second magnet;

[0080] 20. Windings;

[0081] 21. Coil; 22. Lead wire;

[0082] 200. Magnetic element; 210. Ferrite core; 220. Stepped air gap; 230. Winding; 240. Center column. Detailed Implementation

[0083] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0084] This application provides an electronic device, which may include, but is not limited to, mobile phones, tablets, laptops, ultra-mobile personal computers (UMPCs), handheld computers, touch-screen TVs, walkie-talkies, netbooks, point-of-sale (POS) terminals, personal digital assistants (PDAs), wearable devices, virtual reality devices, smart door locks, servers, switches, routers, speakers, desk lamps, robots, etc. For example, the electronic device may be a supercomputing server, a general-purpose server, a data center, etc.

[0085] The electronic device provided in this application embodiment may include a power module, electronic components, and wires, with the power module and electronic components electrically connected via wires.

[0086] Understandably, wires can be cables or conductive patterns formed on printed circuit boards. Electronic devices can be chips such as central processing units (CPUs), graphics processing units (GPUs), and memory, or devices such as resistors, capacitors, and inductors.

[0087] The power module provided in this application embodiment may include, but is not limited to, a liquid-cooled power module, a high-power-density power module, and a high-density power module.

[0088] The power module provided in this application embodiment may include electrodes and magnetic components. The magnetic components are electrically connected to the electrodes, and the electrodes of the power module are electrically connected to electronic devices through wires.

[0089] It is understood that magnetic components can include, but are not limited to, inductors and transformers. For example, magnetic components can be common-mode inductors, differential-mode inductors, etc.

[0090] In some examples, the power module may include one or more magnetic elements. When the power module includes multiple magnetic elements, the magnetic elements may be different magnetic elements. For example, the power module may include an inductor and a transformer, which are electrically connected and respectively electrically connected to corresponding electrodes.

[0091] The specific structure of the magnetic element is described below with reference to the accompanying drawings.

[0092] Figure 1 This is a schematic diagram of the structure of a magnetic element provided in an embodiment of this application.

[0093] For example, see Figure 1As shown, the magnetic element 100 may include a magnetic core 10 and a winding 20, with at least a portion of the structure of the winding 20 surrounding at least a portion of the magnetic core 10. For example, the magnetic core 10 may have an outer structure and an inner structure, with the inner structure surrounded by the outer structure, and a portion of the structure of the winding 20 surrounding the inner structure of the magnetic core 10, such that the winding 20 is also located within the outer structure; or, a portion of the structure of the winding 20 surrounding the outer structure of the magnetic core 10, such that the winding 20 is located outside the magnetic core 10.

[0094] For example, the winding 20 may include a coil 21 and a lead 22 connected together, wherein the coil 21 is disposed around the inside of the magnetic core 10, and the lead 22 extends to the outside of the magnetic core 10 so that the lead 22 is electrically connected to a corresponding electrode.

[0095] In some examples, the forming material of the winding 20 may include a conductive and thermally conductive material. For example, the forming material of the winding 20 may include metal materials such as copper, silver, and aluminum, which have high electrical conductivity and thermal conductivity, giving the winding 20 good electrical and thermal conductivity.

[0096] For example, the winding 20 can be made by bending and winding a strip of conductive material. For instance, the winding 20 can be a structural component made by bending and winding a copper sheet or the like.

[0097] It should be noted that winding 20 can be energized. When current flows through winding 20, a magnetic field is generated around winding 20. The generated magnetic field and its changes can be used to realize the electromagnetic function of magnetic element 100. For example, in a transformer, the alternating current in primary winding 20 generates an alternating magnetic field. This alternating magnetic field is coupled to secondary winding 20 through magnetic core 10, thereby inducing a voltage in secondary winding 20 and realizing voltage step-up / step-down conversion.

[0098] The performance of a magnetic core typically affects the performance of the entire magnetic component, and the performance of the core is related to its material. Soft magnetic materials are commonly used as energy storage carriers, with ferrite magnetic materials and metallic magnetic materials being the most common. Ferrites are generally composed of iron oxide and other metals, such as MeFe2O3, where "Me" represents one or more divalent transition metals, such as manganese (Mn), zinc (Zn), nickel (Ni), cobalt (Co), copper (Cu), iron (Fe), or magnesium (Mg). Ferrites are dark gray or black ceramic materials, hard and brittle, with good chemical stability, high permeability, low loss, and good stability, but they also suffer from poor DC bias saturation.

[0099] In the field of power electronics, metallic magnetic materials are generally made by mixing metal powder with other inorganic non-metallic elements through processes such as coating, pressing, annealing, and impregnation. They possess characteristics such as distributed air gaps, low loss at high frequencies, and excellent DC bias resistance under high current. However, they also suffer from drawbacks such as low permeability and high loss at low frequencies. In other words, different materials have different properties, and their characteristics vary in different operating frequency bands.

[0100] Figure 2 This diagram illustrates the loss and saturation characteristics of different soft magnetic materials. The horizontal axis represents loss characteristics, and the vertical axis represents saturation characteristics. "Good" indicates good performance, and "Bad" indicates poor performance. The letters in the diagram represent the chemical formula, English name, or abbreviation of the different soft magnetic materials. For example, FeNi is an iron-nickel alloy, and MPP (molybdenum permalloy powder) is a soft magnetic material made of molybdenum and an iron-nickel alloy (commonly known as permalloy).

[0101] like Figure 2 As shown, different soft magnetic materials have different loss and saturation characteristics. Therefore, based on the properties of different soft magnetic materials, different soft magnetic materials can be used as cores in different power levels and different conversion topologies. Traditional methods typically use a single material to design inductors or transformers for use in circuits. However, using a single material for the core makes it difficult to combine the advantages of multiple soft magnetic materials, resulting in magnetic components that are not well-suited for high-frequency and low-frequency applications.

[0102] For example, in topologies such as power factor correction (PFC) or inverting buck-boost converters, current critical zero-crossing mode control is typically used, resulting in a large current swing. The high saturation characteristics of metallic magnets and distributed air gaps can achieve good losses and a small size. However, due to the distributed air gaps, electromagnetic interference caused by core leakage flux affects the external circuitry. Simultaneously, the low permeability results in a small inductance, leading to significant efficiency losses under no-load or light-load conditions.

[0103] To solve the above-mentioned technical problems, a magnetic element 200 is provided in the related art. Figure 3 This is a schematic diagram of the structure of a magnetic element 200 in related technologies. For example... Figure 3As shown, the magnetic element 200 includes a ferrite core 210 and a winding 230. The ferrite core 210 has a central pillar 240 inside and a stepped air gap 220 formed on it. This allows the ferrite core 210 to have high inductance and high efficiency under low saturation flux and no-load or light-load conditions. Under high saturation flux, the stepped air gap becomes partially saturated, storing energy through the large air gap and enhancing the saturation capability of the ferrite core 210. This balances light-load inductance and heavy-load saturation characteristics, enabling the magnetic element 200 to exhibit good performance under both light and heavy load conditions, meeting different system requirements.

[0104] However, the stepped air gap scheme is only suitable for ferrite materials with high permeability. For other materials with distributed air gaps, the air gap contributes little to the inductance and the effect is weakened. At the same time, after the local stepped air gap is saturated, it will affect the magnetic flux distribution of the central column 240, which may cause excessive local eddy currents and affect copper loss.

[0105] It should be noted that "light load" refers to a small current or power load on the equipment, usually far below its designed maximum load capacity. "Heavy load" refers to a current or power load on the equipment that is close to its designed maximum load capacity.

[0106] Based on the above issues, designing magnetic components that combine the advantages of ferrite and metallic magnets has become a research direction in the field of power electronics. To leverage the high saturation and distributed air gap characteristics of metallic magnets (such as FeNi and FeSiAl) which help reduce eddy current losses, and the high permeability of ferrites, a series magnetic circuit approach is typically used. For example, in an I-type inductor, the central pillar is made of ferrite, while the side pillars are made of metallic magnets to increase power density. Alternatively, ferrite can be connected in series within the magnetic circuit of a metallic magnet inductor to increase inductance under light loads and ensure saturation under heavy loads.

[0107] However, the series magnetic circuit scheme has the disadvantage that the metallic magnetic properties and inductance will be significantly reduced after the ferrite is saturated.

[0108] Based on this, this application provides a magnetic element 100, see below. Figure 1 As shown, the magnetic element 100 may include a magnetic core 10 and a winding 20, with at least a portion of the winding 20 arranged around at least a portion of the magnetic core 10. The geometry of the magnetic core 10 forms a continuous magnetic path, and the magnetic field lines generated when the winding 20 is energized form a closed magnetic circuit along the magnetic path. The magnetic circuit may include a first branch and a second branch connected in parallel, wherein the portion of the magnetic core through which the first branch passes is made of either a ferrite magnetic material or a metallic magnetic material, and the portion of the magnetic core through which the second branch passes is made of either a ferrite magnetic material or a metallic magnetic material.

[0109] It should be noted that the magnetic conduction path of the magnetic core 10 includes at least the magnets constituting the magnetic core 10 and the air gaps formed between the magnets.

[0110] "The first and second branches connected in parallel" refers to a magnetic path forming the first branch that is different from the magnetic path forming the second branch, similar to parallel branches in a circuit. The first end of the first branch is connected to the first end of the second branch, and the second end of the first branch is connected to the second end of the second branch. The magnetic path is one path before passing the first end where the first and second branches are connected. Between the first and second ends, the magnetic path splits into two paths, and after passing the second end where the first and second branches are connected, the magnetic path merges back into one path. See also Figure 4 As shown, Figure 4 The dashed arrows in the diagram represent the direction of magnetic field line flow, such as... Figure 4 As shown, the magnetic circuit of the first magnet 121 passing through the second magnetic core 12 is the second branch, and the magnetic circuit of part a of the core body 111 of the first magnetic core 11 is the first branch. Figure 4 It can be seen that the second branch and the first branch are connected in parallel. The magnetic path through the second magnet 122 of the second magnetic core 12 is also the second branch, and the magnetic path through part a of the core body 111 of the first magnetic core 11 is also the first branch. Figure 4 It can be seen that the second branch and the first branch are connected in parallel.

[0111] By setting the materials of the magnetic core 10 traversed by the first branch and the magnetic core 10 traversed by the second branch to ferrite magnetic material and metallic magnetic material respectively, the magnetic element 100 can simultaneously possess the advantages of both ferrite magnetic materials and metallic magnetic materials, thus optimizing the performance of the magnetic element 100. Ferrite magnetic materials typically exhibit lower losses at high frequencies, while metallic magnetic materials (such as metal powder cores) have higher permeability and saturation flux density at low frequencies. By combining these two materials, effective performance over a wide frequency range can be achieved.

[0112] In high-frequency applications, ferrites can reduce eddy current losses, while in low-frequency or high-flux-density applications, metallic magnetic materials can reduce hysteresis losses. This allows for maintaining low total losses and improving efficiency under different operating conditions.

[0113] Metallic magnetic materials typically have high saturation magnetic flux density and good resistance to DC bias, which means they can operate under higher magnetic field strengths without easily saturating. Combining them with ferrite magnetic materials can increase the saturation magnetic flux density of the entire magnetic element by 100.

[0114] Furthermore, combining different materials can improve thermal management performance. Metallic magnetic materials typically have good thermal conductivity, which aids in heat dissipation, while ferrite magnetic materials exhibit stable magnetic properties at high temperatures. By rationally selecting and combining materials, a balance can be struck between performance and cost, reducing the amount of expensive materials used while still meeting performance requirements.

[0115] like Figure 1 As shown, for example, the magnetic core 10 may include a first magnetic core 11 and a second magnetic core 12, with the second magnetic core 12 disposed on at least a portion of the surface of the first magnetic core 11. A second branch passes through the second magnetic core 12, and a first branch passes through a portion of the first magnetic core 11. The material of the portion of the first magnetic core through which the first branch passes is either a ferrite magnetic material or a metallic magnetic material, and the material of the second magnetic core is either a ferrite magnetic material or a metallic magnetic material.

[0116] By providing a second magnetic core 12 on at least a portion of the surface of the first magnetic core 11, the magnetic circuit passing through the second magnetic core 12 and a portion of the magnetic circuit passing through the first magnetic core 11 can be connected in parallel (see...). Figure 4 As shown in the diagram, this forms a first and second branch connected in parallel along the magnetic path of the magnetic core 10. This optimizes the magnetic flux distribution and helps balance the magnetic flux density. This combined design offers greater flexibility, allowing the proportions and arrangement of materials to be adjusted according to the needs of specific applications to optimize performance. Moreover, this surface setup is simple, reducing assembly difficulty and thus saving costs.

[0117] It should be noted that the specific location of the first branch is related to the location of the second magnetic core 12. In some embodiments, the first branch passes through the portion of the first magnetic core 11 on which the second magnetic core 12 is located. In other embodiments, the first branch passes through the portion of the first magnetic core 11 on which the second magnetic core 12 is located. The location of the first branch can be determined based on the specific path of the magnetic flux. In this embodiment, the location of the first magnetic core 11 through which the first branch passes is not further limited.

[0118] In one possible implementation, see Figure 5 As shown, the first magnetic core 11 may include a core body 111, a lead-out portion 112, and a winding portion 113. The winding portion 113 is located within the core body 111, and the lead-out portion 112 is formed on one side of the core body 111. A portion of the winding 20 is arranged around the winding portion 113, and another portion of the winding 20 extends from the lead-out portion 112 to the outside of the first magnetic core 11.

[0119] For example, the coil 21 of the winding 20 is arranged around the winding portion 113, and the lead 22 extends from the exit portion 112 to the outside of the first magnetic core 11. The second magnetic core 12 is disposed on the surface of the core body 111, and / or the second magnetic core 12 is disposed on the surface of the winding portion 113. That is, the second branch passes through the second magnetic core 12, while the first branch can pass through the core body 111 and / or the winding portion 113 of the first magnetic core 11.

[0120] In some examples, the winding portion 113 can be located inside the core body 111, for example, at the center of the core body 111. This makes the first core 11 closer to an axisymmetric structure, thus improving the uniformity of magnetic flux density distribution. Of course, in other embodiments, the winding portion 113 can also be located outside the center of the core body 111, which increases the flexibility of the winding position and allows the position of the winding 20 to be set as needed. Therefore, in this embodiment, the position of the winding portion 113 will not be further described.

[0121] It should be noted that the magnetic core body 111 refers to the part of the first magnetic core 11 other than the winding part 113. The first magnetic core 11 forms an integral frame, which can support the winding part 113 set in the magnetic core body 111.

[0122] In some examples, the lead-out portion 112 may be located on one side of the magnetic core body 111 or on both sides of the magnetic core body 111. For example, lead-out portions 112 may be located on both opposite sides of the magnetic core body 111. In the embodiments of this application, the number and location of the lead-out portions 112 are not further limited.

[0123] By placing the winding portion 113 within the core body 111, space can be effectively utilized, making the entire first magnetic core 11 more compact. This facilitates the miniaturization of the magnetic component 100. By placing the main part of the winding 20 within the core body 111, some electromagnetic interference (EMI) can be shielded, thereby improving the electromagnetic compatibility of the magnetic component 100. The partial enclosure of the winding 20 within the core body 111 provides additional mechanical support, reducing the risk of movement and damage to the winding 20 under vibration or mechanical stress.

[0124] By providing the lead-out section 112, the leads 22 of the winding 20 can be extended more easily to the outside of the magnetic core 10, simplifying the connection with other circuit components and reducing installation difficulty and maintenance complexity. Optimizing the arrangement of the winding 20 reduces parasitic inductance and capacitance effects, thereby improving electrical performance (especially in high-frequency applications).

[0125] By setting the second magnetic core 12 on the surface of the magnetic core body 111, and / or setting the second magnetic core 12 on the surface of the winding portion 113, the second magnetic core 12 can be set in different positions according to the needs of specific applications to meet different performance requirements, thereby improving the design flexibility of the magnetic element 100.

[0126] It should be noted that "the second branch passes through the second magnetic core, and the first branch passes through a portion of the first magnetic core; the material of the portion of the first magnetic core through which the first branch passes is either ferrite magnetic material or metallic magnetic material, and the material of the second magnetic core is either ferrite magnetic material or metallic magnetic material." This can be understood as the material of the portion of the first magnetic core 11 through which the first branch passes being ferrite magnetic material and the material of the second magnetic core 12 being metallic magnetic material, respectively. For example, see [link to relevant documentation]. Figure 4 As shown, when the first branch only passes through part a of the core body 111, the material of the second core 12 is different from the material of part a of the core body 111, and is respectively a ferrite magnetic material and a metallic magnetic material. The material of the winding part 113 of the first core 11 and the structure outside part a of the core body is not limited; it can be set to a ferrite magnetic material, a metallic magnetic material, or other magnetic materials besides ferrite magnetic materials and metallic magnetic materials, depending on actual requirements.

[0127] By using different materials in specific sections of the parallel magnetic circuit, optimization can be achieved for the specific performance requirements of that section. For example, ferrite materials can be used in sections requiring high permeability, while metallic magnetic materials can be used in sections requiring high saturation flux density. By using high-performance materials only in critical areas, a balance can be struck between performance and cost, reducing overall material costs. This design strategy offers greater flexibility, allowing the use of materials to be adjusted according to specific application needs to achieve specific performance targets, making it suitable for a variety of applications and meeting different technical requirements, such as specific functional requirements in power electronic devices, transformers, and inductors. Furthermore, this design allows for different frequency response characteristics in specific sections of the magnetic circuit, enabling the entire component to maintain good performance over a wider frequency range.

[0128] In other words, the first magnetic core 11 can be made of more than one material, and the choice of material for different locations can be determined according to specific requirements. Similarly, the second magnetic core 12 can be made of more than one material, and the choice of material for different locations can be determined according to specific requirements. In this embodiment, no further limitation is made on which part of the first magnetic core 11 differs in material from the second magnetic core 12.

[0129] Of course, in some other embodiments, the first magnetic core 11 may be made of one material and the second magnetic core 12 may also be made of one material, and the materials of the first magnetic core 11 and the second magnetic core 12 may be ferrite magnetic material and metallic magnetic material, respectively.

[0130] In summary, different positions of the first magnetic core 11 can be made of different materials or the same material. Similarly, different positions of the second magnetic core 12 can be made of different materials or the same material. In this embodiment, no further restrictions are placed on the materials used at different positions of the first magnetic core 11 or the second magnetic core 12.

[0131] In some examples, the overall shape of the magnetic core 10 can be a cuboid structure. The overall shape of the first magnetic core 11 is also a cuboid structure. It should be noted that in other embodiments, the first magnetic core 11 can also have other structures, such as trapezoids, prisms, or other regular or irregular shapes.

[0132] In this embodiment, for ease of description, the x-direction in the figure is taken as the first direction, the y-direction as the second direction, and the z-direction as the thickness direction of the magnetic core 10. The first, second, and third directions are all perpendicular to each other.

[0133] For example, such as Figure 5 As shown, the core body 111 of the first magnetic core 11 may include a first surface 1111, a second surface 1112, a third surface 1113, a fourth surface 1114, a fifth surface 1115, and a sixth surface 1116. A receiving space is formed inside the core body 111, and the winding portion 113 is located within the receiving space. Specifically, the first surface 1111 and the second surface 1112 are opposite to each other along a second direction (y-direction), the third surface 1113 and the fourth surface 1114 are opposite to each other along a first direction (x-direction), and the fifth surface 1115 and the sixth surface 1116 are opposite to each other along the thickness direction (z-direction) of the core 10.

[0134] It is understood that the cuboid structure in the embodiments of this application refers to a cuboid structure in a general sense. That is, any structure that is close to a cuboid structure can be regarded as a cuboid structure. For example, any three-dimensional structure including six faces arranged in pairs can be regarded as a cuboid structure. The cuboid structure may have chamfers and other structures.

[0135] It should be noted that in some embodiments, the winding portion 113 can be arranged along the x-direction, y-direction, or z-direction, for example, in Figure 5In the example shown, the winding portion 113 is arranged along the z-direction. Of course, in other embodiments, the winding portion 113 can also be arranged along other directions, such as along the x-direction, along the y-direction, etc. In this embodiment, the arrangement position of the winding portion 113 is not further limited. The arrangement direction of the winding portion 113 refers to the direction of the central axis of the winding 20 when it is wound.

[0136] It should be noted that, in some embodiments, the lead-out portion 112 may be disposed on one or more of the first surface 1111, the second surface 1112, the third surface 1113, the fourth surface 1114, the fifth surface 1115, and the sixth surface 1116. For example, the lead-out portion 112 may be located on the first surface 1111 or the second surface 1112, or a portion of the lead-out portion 112 may be located on the first surface 1111 and another portion may be located on the second surface 1112, etc.

[0137] exist Figure 1 The magnetic element 100 shown has a lead-out portion 112 located on the first surface 1111 of the core body 111 of the first magnetic core 11. This reduces the difficulty of setting up the winding 20, as well as the difficulty of leading out the wire, and also reduces the difficulty of setting up the lead-out portion 112.

[0138] See also Figure 5 As shown, the first surface 1111 may include a first opening 1117, and the second surface 1112 may include a second opening 1118, with the first opening 1117 and the second opening 1118 communicating with each other. At least one of the first opening 1117 and the second opening 1118 forms a wire outlet portion 112.

[0139] In some embodiments, the first opening 1117 of the first surface 1111 forms a wire outlet 112. Of course, in other embodiments, the second opening 1118 of the second surface 1112 may also form a wire outlet 112, which can be set according to assembly requirements.

[0140] By forming a connecting first opening 1117 and a second opening 1118 on the first surface 1111 and the second surface 1112 of the magnetic core body 111, the arrangement and management of the leads 22 of the winding 20 can be simplified. This design allows the leads 22 to pass through the interior of the first magnetic core 11, thereby reducing the complexity and length of the external leads 22. This design makes the entire magnetic element 100 more compact, suitable for applications requiring space saving, such as miniaturized electronic devices. The leads 22 of the winding 20, passing through the openings inside the first magnetic core 11, can better contact the first magnetic core 11, thereby utilizing the thermal conductivity of the first magnetic core 11 to aid in heat dissipation and improve heat dissipation performance.

[0141] It should be noted that the first opening 1117 and the second opening 1118 can be openings directly formed on the first magnetic core 11. For example, the first magnetic core 11 includes magnets of different shapes. When magnets of different shapes are assembled, the first opening 1117 and the second opening 1118 can be formed on the first surface 1111 and the second surface 1112. For example, the first magnetic core 11 includes an E-type magnetic core and an I-type magnetic core. The I-type magnetic core is disposed at the open end of the E-type magnetic core, so the first opening 1117 and the second opening 1118 can be formed on the side of the E-type magnetic core. Of course, in other embodiments, the first opening 1117 and the second opening 1118 can also be obtained through post-processing. In this embodiment, the method of obtaining the first opening 1117 and the second opening 1118 is not further limited.

[0142] In this embodiment, the second magnetic core 12 may be attached to the outer or inner surface of one or more of the first surface 1111, the second surface 1112, the third surface 1113, the fourth surface 1114, the fifth surface 1115 or the sixth surface 1116, or it may be attached to the outer side of the winding portion 113 in the circumferential direction.

[0143] In this embodiment, the location of the second magnetic core 12 is not limited, as long as the second magnetic core 12 and a portion of the magnetic circuit of the first magnetic core 11 can be connected in parallel.

[0144] The location of the second magnetic core 12 will be described in detail below with reference to the accompanying drawings.

[0145] In one possible implementation, at least a portion of the structure of the second magnetic core 12 may be attached to the outside of the lead-out portion 112 (see [reference]). Figure 1 (As shown). For example, the second magnetic core 12 may be provided only on the outside of the lead-out portion 112. In this case, the first branch can pass through the magnets outside the lead-out portion 112 of the magnetic core body 111 and the air gap between the magnets.

[0146] It should be noted that the second magnetic core 12, which is attached to the outside of the lead wire portion 112, can only cover a part of the lead wire portion 112 in order to avoid the lead wire 22 of the winding 20.

[0147] By attaching the second magnetic core 12 to the outside of the lead-out portion 112, an additional magnetic flux path is provided, helping to guide and concentrate the magnetic flux, thus improving the efficiency of the magnetic circuit, reducing leakage flux, and enhancing overall magnetic performance. Placing the second magnetic core 12 on the outside of the lead-out portion 112 effectively shields against electromagnetic interference (EMI), protecting the leads 22 of the winding 20 and improving the electromagnetic compatibility (EMC) of the magnetic component 100. Adding the second magnetic core 12 to the outside of the lead-out portion 112 increases the amount of magnetic material, reducing leakage inductance, which is particularly important for applications requiring precise inductance control (such as high-frequency transformers and inductors). The physical presence of the second magnetic core 12 provides additional mechanical protection for the lead-out portion 112, reducing the impact of external environmental factors such as vibration, shock, or other mechanical stresses on the leads 22. The second magnetic core 12 aids in heat dissipation, especially where heat may be generated in the lead-out portion 112. By providing an additional heat conduction path, heat can be managed more effectively, preventing overheating. This design improves the structural integrity of the entire magnetic component, providing better mechanical stability and durability. Depending on the specific application requirements, the material and shape of the second magnetic core 12 can be adjusted to optimize specific performance parameters, such as permeability and saturation flux density.

[0148] In some embodiments, the second magnetic core 12 may include a first magnet 121, with the lead-out portion 112 located on a first surface 1111 or a second surface 1112, and the first magnet 121 is attached to the surface of the first magnet 121 where the lead-out portion 112 is located.

[0149] In some other embodiments, the second magnetic core 12 may include a first magnet 121 and a second magnet 122. A first surface 1111 includes a first opening 1117, and a second surface 1112 includes a second opening 1118. The first opening 1117 and the second opening 1118 communicate with each other. At least one of the first opening 1117 and the second opening 1118 forms a lead-out portion 112. The first magnet 121 is attached to the outside of the first opening 1117, and the second magnet 122 is attached to the outside of the second opening 1118 (see [link to previous embodiment]). Figure 1 (As shown).

[0150] This configuration allows for the addition of magnets on both sides of the magnetic core body 111, effectively concentrating and guiding the magnetic flux. This helps improve the efficiency and performance of the magnetic components, reduces leakage flux, and enhances flux concentration. By placing the first magnet 121 and the second magnet 122 on opposite first surfaces 1111 and 1112, magnets are symmetrically positioned on both sides of the magnetic core body 111. This achieves a more uniform magnetic field distribution, reducing losses caused by magnetic field non-uniformity and improving the overall performance of the device. Adding the first magnet 121 and the second magnet 122 to both sides of the first magnetic core 11 effectively reduces leakage inductance. This is particularly important for applications requiring precise control of inductance values ​​(such as high-frequency transformers and inductors).

[0151] Figure 6 This is a schematic diagram of the spatial magnetic flux density distribution of the first magnetic core of the magnetic element in an embodiment of this application. The diagram shows a schematic diagram of three sides. Figure 7 This is a schematic diagram of the spatial magnetic flux density distribution of the magnetic core of the magnetic element in an embodiment of this application. The diagram shows three sides. (Combined with...) Figure 6 and Figure 7 As shown, when the second magnetic core 12 is not disposed on the outside of the first magnetic core 11, the magnetic field in space of the first magnetic core 11 is relatively strong, and there is strong leakage magnetic field at the output part 112. When the second magnetic core 12 is attached to the output part 112 of the first magnetic core 11, the magnetic flux density of the entire magnetic core 10 in space is significantly reduced. That is to say, by attaching the second magnetic core 12 to the output part 112 of the first magnetic core 11, radiation interference can be reduced. When the magnetic element 100 is disposed in a power supply module or electronic device, the interference of the magnetic element 100 to other electronic devices in the power supply module or electronic device can be reduced.

[0152] Figure 8 This is a schematic diagram of the magnetic flux density distribution of the first magnetic core of the magnetic element in an embodiment of this application. Figure 8 In the diagram, A represents the magnetic flux density distribution on the surface of the first magnetic core, and B represents the magnetic flux density distribution inside the first magnetic core.

[0153] Figure 9 This is a schematic diagram of the magnetic flux density distribution of the magnetic core of the magnetic element in an embodiment of this application. Wherein, Figure 9 In the diagram, C represents the magnetic flux density distribution on the surface of the first magnetic core, and D represents the magnetic flux density distribution inside the first magnetic core.

[0154] like Figure 8 As shown, when the second magnetic core 12 is not disposed on the surface of the first magnetic core 11, the magnetic flux density distribution on the surface and inside of the first magnetic core 11 differs significantly. For example... Figure 9As shown, when the second magnetic core 12 is provided at the output portion 112 of the first magnetic core 11, the magnetic flux density distribution on the surface and inside of the entire magnetic core 10 becomes more uniform. In other words, in this embodiment, by connecting the second magnetic core 12 in parallel with the first magnetic core 11, the uniformity of the magnetic flux density distribution of the entire magnetic core 10 can be improved. This prevents certain areas of the magnetic core 10 from prematurely entering saturation, thereby improving the performance and efficiency of the magnetic element 100. A uniform magnetic flux density distribution reduces stress concentration and overheating, thus improving the reliability and service life of the equipment. An uneven magnetic flux density distribution may lead to the formation of local hot spots, thereby increasing heat loss. A uniform distribution helps reduce overall heat loss, extend equipment life, and reduce cooling requirements.

[0155] In one possible implementation, the first magnetic core 11 is made of a metallic magnetic material, and the second magnetic core 12 is made of a ferrite magnetic material.

[0156] It should be noted that, as shown in the attached diagram, the first magnetic core uses more material, while the second magnetic core uses relatively less. In other words, the first magnetic core is larger in volume, and the second magnetic core is smaller. By using a metallic magnetic material for the larger first magnetic core, which typically has a higher saturation magnetic flux density, it is possible to better handle high-current applications without easily saturating. Metallic magnetic cores generally exhibit lower losses in the low- and mid-frequency ranges. Therefore, a larger metallic magnetic core can effectively improve efficiency in these frequency ranges.

[0157] For example, the first magnetic core 11 can be a metal powder core. A metal powder core refers to a solid magnetic core formed by mixing metal powder (such as iron, nickel, molybdenum, etc.) with insulating materials and then forming it through pressing and sintering processes. Metal powder cores typically possess high mechanical strength and durability, and can withstand significant physical stress and vibration. The magnetic properties of metal powder cores can be customized by adjusting the alloy composition and powder particle size to meet specific application requirements. This flexibility makes them suitable for a wide variety of power electronic applications.

[0158] Of course, in other embodiments, the first magnetic core 11 may be made of ferrite magnetic material and the second magnetic core 12 may be made of metallic magnetic material.

[0159] In one possible implementation, winding 20 is a flat enameled wire winding 20. The shape of the flat enameled wire allows it to be packed more tightly together, thereby increasing the fill factor of winding 20. This means that more wires can be placed within the same space of winding 20, increasing the current carrying capacity of winding 20. Since flat wire can utilize the space of winding 20 more efficiently, it may reduce the amount of material used, thereby reducing manufacturing costs. Due to the larger cross-sectional area of ​​flat wire, its DC resistance is lower than that of round wire. This helps to reduce power loss and improve device efficiency. The larger surface area of ​​flat wire helps to dissipate heat more effectively, especially in high-power applications. This can lower the operating temperature of winding 20, improving device reliability and lifespan.

[0160] Of course, in other embodiments, the winding 20 can also be a single-layer winding 20, a multi-layer winding 20, a distributed winding 20, an interleaved winding 20, a concentric winding 20, a honeycomb winding 20, a foil winding 20, etc. In this embodiment, the type of winding 20 is not further limited, and can be set according to the requirements.

[0161] In one possible implementation, an adhesive layer (not shown in the figure) may be provided between the second magnetic core 12 and the first magnetic core 11, and the second magnetic core 12 is fixedly connected to the first magnetic core 11 by the adhesive layer.

[0162] For example, the adhesive layer material can be epoxy resin, polyurethane adhesive, silicone, acrylic adhesive, inorganic adhesive, etc. In this embodiment, the material of the adhesive layer is not further limited. A suitable adhesive material can be selected according to the actual situation to ensure the reliability and performance of the magnetic core 10.

[0163] In this embodiment, the adhesive layer provides a strong connection, allowing the second magnetic core 12 to be securely attached to the first magnetic core 11. This reduces the risk of displacement or loosening of the magnetic core 10 due to vibration or mechanical stress, improving the mechanical stability of the device. The adhesive layer acts as a shock absorber and buffer, absorbing mechanical vibrations and shocks, thereby protecting the first magnetic core 11 and the second magnetic core 12 from external physical stresses. This helps extend the service life of the magnetic component 100. Using an adhesive layer to fix the magnetic core 10 simplifies the assembly process, reduces the need for mechanical fasteners (such as screws or clamps), and thus reduces production complexity and cost.

[0164] In one possible implementation, the magnetic element 100 is an inductor. For example, the inductor can be a common-mode inductor, a differential-mode inductor, etc. In this embodiment, the type of inductor is not further limited.

[0165] Of course, in other embodiments, the magnetic element may also be a transformer, a magnetic bead, etc. In the embodiments of this application, the specific type of magnetic element is not further limited.

[0166] In one possible implementation, the first magnetic core 11 can be an EQI-type magnetic core. An EQI-type magnetic core provides an efficient magnetic flux path, effectively guiding and concentrating the flux, reducing leakage flux, and improving the efficiency of the magnetic circuit. EQI-type magnetic cores typically have a compact geometry, suitable for applications requiring space saving. This design helps reduce the overall size of the device, making it suitable for miniaturized electronic devices. This structure provides good mechanical stability, reducing the impact of vibration and mechanical stress on the core 10, thereby improving the device's durability. This structure allows for better airflow and heat conduction, aiding in heat dissipation, especially in high-power applications, preventing overheating of the core 10 and winding 20. The structural design of the EQI-type magnetic core generally simplifies the assembly process, is easy to manufacture and process, and has high material utilization, which can help reduce production costs. Additionally, this facilitates the placement of the second magnetic core 12, reducing assembly complexity.

[0167] like Figure 10 As shown, the first magnetic core 11 may include an E-type magnetic core 114 and an I-type magnetic core 115. The E-type magnetic core 114 may include a crossbeam 1141, a central post 1142, and side posts 1143. One end of the central post 1142 is connected to the crossbeam 1141, and the other end extends away from the crossbeam 1141. One end of the side post 1143 is connected to the crossbeam 1141, and the other end extends away from the crossbeam 1141. There are two side posts 1143, located at opposite ends of the crossbeam 1141 along a first direction (x-direction), with the central post 1142 located between the two side posts 1143. The I-type magnetic core 115 is disposed opposite to the crossbeam 1141, and the I-type magnetic core 115 is located at the end of the central post 1142 and the side post 1143 away from the crossbeam 1141. The crossbeam 1141, the side post 1143, and the type I magnetic core 115 together form the magnetic core body 111. The magnetic core body 111 has lead-out portions 112 at both ends in a second direction (y-direction), which is perpendicular to the first direction. The center post 1142 serves as the winding portion 113. The type I magnetic core 115 can also be connected to the type E magnetic core 114 via an adhesive layer.

[0168] For example, the second magnetic core 12 can be attached to the central column 1142, the side column 1143, the crossbeam 1141, or the I-shaped magnetic core 115, etc. In this embodiment of the application, the setting position of the second magnetic core 12 is not further limited.

[0169] The combination of E-type and I-type magnetic cores forms a closed magnetic circuit, effectively guiding and concentrating magnetic flux, reducing leakage flux, and improving circuit efficiency. This closed magnetic circuit design helps reduce leakage inductance and parasitic capacitance effects, thereby improving electrical performance, especially in high-frequency applications. The structure of the E-type and I-type magnetic cores simplifies the assembly process; for example, the I-type core can be directly placed on the opening of the E-type core to form a complete magnetic circuit, reducing the need for complex assembly processes. This structure allows for better airflow and heat conduction, aiding in heat dissipation, especially in high-power applications, preventing overheating of the first core 11 and winding 20. Furthermore, this combined structure provides good mechanical stability; the side posts 1143 of the E-type core and the plane of the I-type core provide robust support, reducing the impact of vibration and mechanical stress on the first core 11. E-type and I-type magnetic cores are generally easy to manufacture and process, with high material utilization, which helps reduce production costs.

[0170] Figure 11 This diagram illustrates a comparison of the efficiency of the magnetic components in this application and magnetic elements in related technologies. S1 represents the efficiency curve of the solution in this application, and S2 represents the efficiency curve of a solution in related technologies where the magnetic core only includes a first magnetic core. Figure 11 As shown, when this magnetic component is placed on the power supply module, the light-load efficiency can be improved by more than 0.4%, and the peak efficiency can be improved by more than 0.2%.

[0171] Figure 12 This is a schematic diagram comparing the no-load inductance of the magnetic component in the embodiments of this application and the magnetic elements in related technologies. For example... Figure 12 As shown, when the magnetic component is placed on the power supply module, the no-load inductance of this solution can be increased by about 20%.

[0172] Figure 13 This is a schematic diagram comparing the no-load loss of the magnetic components in the embodiments of this application and the magnetic elements in related technologies. For example... Figure 13 As shown, when the magnetic component is placed on the power module, the no-load loss of this solution is reduced by about 20%.

[0173] Figure 14 This diagram illustrates a comparison of the inductance decay curves of the magnetic component in this application and magnetic elements in related technologies. P1 represents the inductance decay curve of the solution in this application, while P2 represents the inductance decay curve of a solution in related technologies where the magnetic core only includes a first magnetic core. This solution can delay inductance decay.

[0174] In other embodiments, the second magnetic core 12 may be disposed in other locations. For example, in one possible implementation, at least a portion of the structure of the second magnetic core 12 may be disposed around the outside of the winding portion 113 along the circumference of the winding portion 113.

[0175] like Figure 15 As shown, the first magnetic core 11 is an E-type magnetic core, and the second magnetic core 12 can be a ring structure, and the second magnetic core 12 is sleeved on the outside of the winding portion 113 (central post). In this embodiment, the first branch passes through the winding portion 113.

[0176] By arranging the second magnetic core 12 around the winding portion 113, the coupling efficiency of the magnetic flux can be improved. This structure can improve the efficiency and performance of the inductor or transformer by better guiding the magnetic flux. The second magnetic core 12 surrounding the winding portion 113 can effectively reduce leakage flux. This helps improve the electromagnetic compatibility (EMC) of the device and reduce interference to surrounding circuits. Furthermore, this arrangement allows the magnetic circuit of the second magnetic core 12 to be connected in parallel with the magnetic circuit at the winding portion 113, optimizing the magnetic flux distribution, helping to balance the magnetic flux density, making the magnetic flux density distribution more uniform at different locations of the magnetic element 100, reducing the risk of local saturation, improving the overall efficiency of the magnetic circuit, and reducing losses. By arranging the second magnetic core 12, the coverage area of ​​the core 10 material can be increased, which can increase the inductance value, particularly advantageous for applications requiring high inductance values ​​(such as filters and resonant circuits). The presence of the second magnetic core 12 provides an additional heat conduction path, allowing for more effective heat management and preventing overheating of the winding 20. The second magnetic core 12 surrounding the winding portion 113 can provide additional mechanical protection, reducing the impact of the external environment on the winding 20, such as vibration and mechanical stress.

[0177] Of course, in other embodiments, the second magnetic core 12 may include a plurality of separately arranged magnets, with some magnets of the second magnetic core 12 disposed on the outside of the lead-out portion 112 and other magnets of the second magnetic core 12 disposed on the outside of the winding portion 113. This can reduce magnetic leakage at the lead-out portion 112 and further homogenize the magnetic flux density distribution of the magnetic core 10, thereby improving the performance of the magnetic element 100.

[0178] In one possible implementation, at least a portion of the structure of the second magnetic core 12 may also be attached to the surface of the magnetic core body 111 in the area other than where the lead wire portion 112 is provided.

[0179] For example, the second magnetic core 12 can be attached to any one or more of the third surface 1113, fourth surface 1114, fifth surface 1115 and sixth surface 1116 of the magnetic core body 111 of the first magnetic core 11.

[0180] like Figure 16As shown, the second magnetic core 12 can be disposed on the third surface 1113 and the fourth surface 1114 of the core body 111 of the first magnetic core 11, that is, the second magnetic core 12 is attached to the outside of the side post 1143. At this time, the first branch passes through the side post 1143. By simultaneously disposing the second magnetic core 12 on the third surface 1113 and the fourth surface 1114, the structure of the magnetic core 10 can be made more symmetrical, thereby improving the uniformity of the magnetic flux density distribution of the magnetic core 10.

[0181] Of course, in other examples, the second magnetic core 12 may also be disposed only on the third surface 1113 or the fourth surface 1114 of the core body 111 of the first magnetic core 11. In the embodiments of this application, the placement of the second magnetic core 12 is not further limited.

[0182] like Figure 17 As shown, the second magnetic core 12 can be disposed on the fifth surface 1115 of the magnetic core body 111 of the first magnetic core 11, that is, the second magnetic core 12 is attached to the surface of the crossbeam 1141, at which time the first branch passes through the crossbeam 1141.

[0183] Of course, in some examples, the second magnetic core 12 can also be disposed on the sixth surface 1116 of the core body 111 of the first magnetic core 11. That is, the second magnetic core 12 is attached to the surface of the type I magnetic core 115 (not shown in the figure), in which case the first branch passes through the type I magnetic core 115. Alternatively, the second magnetic core 12 can also be disposed on the fifth surface 1115 and the sixth surface 1116 of the core body 111 of the first magnetic core 11, which can make the structure of the magnetic core 10 more symmetrical, thereby improving the uniformity of the magnetic flux density distribution of the magnetic core 10. In the embodiments of this application, the placement of the second magnetic core 12 is not further limited.

[0184] By adding a second magnetic core 12 to a specific region of the core body 111, the magnetic flux path can be optimized, and the concentration and guidance of the magnetic flux can be enhanced, which helps to improve the efficiency and performance of the magnetic components. The additional portion of the second magnetic core 12 can effectively reduce leakage flux, ensuring that more flux circulates in the predetermined magnetic circuit, which is beneficial to improving the performance of inductors and transformers. By increasing the coverage of the material of the core 10, the inductance value can be increased and stable inductance characteristics can be maintained under different operating conditions. The second magnetic core 12 can help with heat dissipation, especially in high-power applications. By providing an additional heat conduction path, heat can be managed more effectively, preventing the core 10 and winding 20 from overheating. The physical presence of the second magnetic core 12 can provide additional mechanical protection for the core body 111, reducing the impact of the external environment on the core 10, such as vibration and mechanical stress.

[0185] Furthermore, this arrangement allows the magnetic circuit passing through the second magnetic core 12 and the magnetic circuit passing through the portion of the first magnetic core 11 that is attached to the second magnetic core 12 to be connected in parallel. This optimizes the magnetic flux distribution, helps balance the magnetic flux density, makes the magnetic flux density distribution more uniform at different locations of the magnetic element 100, reduces the risk of local saturation, improves the overall efficiency of the magnetic circuit, and reduces losses. Depending on the specific application requirements, the material and shape of the second magnetic core 12 can be adjusted to meet different performance requirements, thereby increasing the design flexibility of the magnetic element 100.

[0186] It should be noted that, in this embodiment, the location of the second magnetic core 12 can be divided into three categories: the first category is located at the lead-out portion 112, the second category is located at the winding portion 113, and the third category is located at a position other than the lead-out portion 112 on the core body 111. When the second magnetic core 12 is located at a position other than the lead-out portion 112 on the core body 111, it can be located on the inner or outer side of the core body 111, depending on the specific requirements. Of course, assembling the second magnetic core 12 on the outer side of the core body 111 is less difficult and can reduce processing costs. Furthermore, the second magnetic core 12 can be located in one of the three categories, or simultaneously in any two of the three categories, or simultaneously in all of the three categories. In this embodiment, the location of the second magnetic core 12 is not further limited.

[0187] It should be noted that in other embodiments, the first magnetic core 11 can also be other types of magnetic cores. For example, the first magnetic core 11 can be a can-shaped magnetic core. A can-shaped magnetic core (also called a cup-shaped magnetic core) has a closed cylindrical structure, similar to a can or cup. A can-shaped magnetic core is typically formed by mating two symmetrical hemispherical or cylindrical magnetic cores (usually made of ferrite material) to form a closed magnetic circuit. The cylindrical portion in the center of the magnetic core is used to wind the coil, and the surrounding closed structure provides good shielding.

[0188] Figure 18 This is a cross-sectional structural diagram of the magnetic core of another magnetic element provided in an embodiment of this application. Figure 19 for Figure 18 The diagram shows a cross-sectional view of the magnetic core of the magnetic element from another angle. The magnetic core of this magnetic element has a cylindrical shape. Figure 18 It can be viewed as a sectional view of the magnetic core cut along the axial direction from the perspective of the main view. Figure 19 This can be viewed as a top-down view, showing the cross-sectional view of the magnetic core cut along a plane perpendicular to the axial direction.

[0189] like Figure 18 and 19As shown, the first magnetic core 11 is a schematic diagram of a can-shaped magnetic core. This can-shaped magnetic core may include a core body 111 and a winding portion 113. The core body 111 is formed by the mating of two symmetrical cylindrical magnetic cores, and the winding portion 113 is located inside the cylindrical core body 111. The second magnetic core 12 may be a ring structure, and the second magnetic core 12 is sleeved on the outside of the winding portion 113.

[0190] It is understood that an opening can be provided on the magnetic core body 111 of the magnetic element so that the winding provided around the winding portion 113 can be led out from the inside of the magnetic core body 111.

[0191] Figure 20 for Figure 18 The diagram shows the magnetic circuit of the magnetic core of the magnetic element shown. Figure 20 As shown, the magnetic circuit passing through the winding portion 113 of the first magnetic core 11 is the first branch, and the magnetic circuit passing through the second magnetic core 12 is the second branch. The first branch and the second branch are connected in parallel.

[0192] Of course, in other embodiments, the second magnetic core 12 may be arranged around the outside or inside of the magnetic core body 111. In this embodiment, the location of the second magnetic core 12 is not further limited.

[0193] Of course, in other embodiments, the first magnetic core 11 can also be an EE-type magnetic core, an EI-type magnetic core, an EP-type magnetic core, an RM-type magnetic core, a U-type magnetic core, etc. In the embodiments of this application, the specific structure of the first magnetic core is not further limited.

[0194] It should be noted that "EQI type magnetic core" is a specific type of magnetic core that combines the characteristics of E-type, Q-type, and I-type magnetic cores. The following is an explanation of each letter in the EQI type magnetic core and the meaning of their combinations. "E-type magnetic core" has three legs, shaped like the letter "E". This structure provides a good magnetic flux path and is commonly used in transformers and inductors. The center leg of an E-type magnetic core is typically used for the winding coil, while the outer legs are used to form a closed magnetic circuit. "Q-type magnetic core" is not usually a standard core shape but may represent a specific design feature or a manufacturer's naming convention. "I-type magnetic core" is a simple, straight strip core, typically used in conjunction with an E-type core to form a complete closed magnetic circuit. The I-type portion helps increase the length of the magnetic circuit and the concentration of magnetic flux.

[0195] The "EE-shaped magnetic core" consists of two symmetrical E-shaped sections, which are typically placed symmetrically together to form a complete magnetic circuit. Each E-shaped section has three legs: a central leg and two outer legs. The central leg is typically used for winding the coil, while the outer legs are used to close the magnetic circuit. The symmetrical combination of the two E-shaped sections closes the magnetic circuit, reduces magnetic leakage, and increases the concentration of magnetic flux.

[0196] An "EI-type magnetic core" consists of an E-shaped section and an I-shaped section. This combination forms a complete magnetic circuit. The E-shaped section has three legs, resembling the shape of the letter "E". The center leg is typically used for winding the coil, while the outer legs are used to form part of the magnetic circuit. The I-shaped section is a simple, straight strip of magnetic core used to mate with the E-shaped section to close the magnetic circuit.

[0197] "EP-type magnetic cores" have a circular or elliptical cross-section and a compact overall structure. This design helps reduce the core's size, making it suitable for space-constrained applications. "E" indicates that the core's shape resembles the letter "E." E-type structures typically have a central post for winding the coil. "P" stands for "Pot" or "Profile," usually referring to the overall shape or profile of the core. EP-type magnetic cores typically have a low profile and compact design, resembling a flattened jar or cup.

[0198] The name "RM-type magnetic core" comes from "ring modular" or "rectangular modular," and its shape is usually a circular or rectangular modular design, which helps to optimize space utilization.

[0199] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. The terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0200] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have 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 or all of the technical features therein. Such 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 application.

Claims

1. A magnetic element, characterized in that, It includes a magnetic core and a winding, wherein at least a portion of the winding is arranged around at least a portion of the magnetic core; wherein, When the winding is energized, the magnetic field lines generated pass through the magnetic core to form a closed magnetic circuit; The magnetic circuit includes a first branch and a second branch connected in parallel. The portion of the magnetic core traversed by the first branch is made of either ferrite magnetic material or metallic magnetic material. The portion of the magnetic core traversed by the second branch is made of either ferrite magnetic material or metallic magnetic material.

2. The magnetic element according to claim 1, characterized in that, The magnetic core includes a first magnetic core and a second magnetic core, at least a portion of the winding structure is disposed around at least a portion of the first magnetic core, and the second magnetic core is disposed on the surface of at least a portion of the first magnetic core; wherein... The second branch passes through the second magnetic core, and the first branch passes through a portion of the first magnetic core; The first magnetic core of the first branch is made of either ferrite magnetic material or metallic magnetic material, and the second magnetic core is made of either ferrite magnetic material or metallic magnetic material.

3. The magnetic element according to claim 2, characterized in that, The first magnetic core includes a core body and a winding portion; wherein, The winding section is located inside the magnetic core body; The winding includes a coil, which is disposed around the winding portion; The second magnetic core is disposed on the surface of the magnetic core body, and / or the second magnetic core is disposed on the surface of the winding portion.

4. The magnetic element according to claim 3, characterized in that, At least a portion of the structure of the second magnetic core is arranged circumferentially around the outside of the winding portion.

5. The magnetic element according to claim 3 or 4, characterized in that, The winding also includes leads, which are connected to the coil; The magnetic core body has a lead-out section on one side for the lead wire to pass through, and the lead wire extends from the lead-out section to the outside of the magnetic core body; At least a portion of the structure of the second magnetic core is attached to the outside of the lead-out portion.

6. The magnetic element according to claim 5, characterized in that, At least a portion of the structure of the second magnetic core is attached to the surface of the magnetic core body in an area other than the lead-out portion.

7. The magnetic element according to claim 5, characterized in that, The magnetic core body includes a first side and a second side that are opposite to each other. The first side includes a first opening, and the second side includes a second opening. The first opening and the second opening are in communication. At least one of the first opening and the second opening forms the outlet portion; wherein... The second magnetic core includes a first magnet and a second magnet, wherein the first magnet is attached to the outside of the first opening and the second magnet is attached to the outside of the second opening.

8. The magnetic element according to any one of claims 5-7, characterized in that, The first magnetic core includes an E-type magnetic core and an I-type magnetic core; wherein, The E-type magnetic core includes a crossbeam, a central column, and side columns; One end of the central column is connected to the crossbeam, and the other end extends away from the crossbeam. One end of the side post is connected to the crossbeam, and the other end extends away from the crossbeam. The number of side columns is two, and the two side columns are located at both ends of the crossbeam along the first direction, and the middle column is located between the two side columns; The type I magnetic core is located at the end of the middle column and the side column away from the crossbeam; The crossbeam, the side post, and the I-type magnetic core together form the magnetic core body; The wire outlet is formed at both ends of the magnetic core body in a second direction, which is perpendicular to the first direction; The central column is the winding section.

9. The magnetic element according to claim 8, characterized in that, The first magnetic core is an EQI type magnetic core.

10. The magnetic element according to claim 8 or 9, characterized in that, The first magnetic core is made of metallic magnetic material, and the second magnetic core is made of ferrite magnetic material.

11. The magnetic element according to claim 10, characterized in that, The first magnetic core is a metal powder core.

12. The magnetic element according to any one of claims 1-11, characterized in that, The winding is a flat enameled wire winding.

13. The magnetic element according to any one of claims 2-11, characterized in that, An adhesive layer is provided between the second magnetic core and the first magnetic core, and the second magnetic core is fixedly connected to the first magnetic core through the adhesive layer.

14. The magnetic element according to claim 13, characterized in that, The adhesive layer is made of at least one of epoxy resin, polyurethane adhesive, silicone, acrylic adhesive, or inorganic adhesive.

15. The magnetic element according to any one of claims 1-14, characterized in that, The magnetic element is an inductor.

16. A power supply module, characterized in that, It includes electrodes and a magnetic element as described in any one of claims 1-15, wherein the winding of the magnetic element is electrically connected to the electrodes.

17. An electronic device, characterized in that, It includes an electrical wire and a magnetic element as described in any one of claims 1-15, wherein the winding of the magnetic element is electrically connected to the electrical wire.

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