A magnetic core structure, integrated magnetic component and multi-port dc converter

Abstract

The utility model relates to the field of power electronics, disclose a kind of magnetic core structure, integrated magnetic component and multi-port direct current converter.The magnetic core structure includes: identical and symmetrical splicing top magnetic core and bottom magnetic core;In the top magnetic core and bottom magnetic core opposite side, there is one center winding column unit and multiple edge winding column units;The center winding column unit is arranged in the center of the magnetic core, and multiple edge winding column units are equidistantly distributed in the edge position of the magnetic core;In the edge of the top magnetic core and bottom magnetic core, multiple through cutouts are provided, multiple through cutouts and multiple edge winding column units one-to-one correspond, and each through cutout is arranged close to the side of corresponding edge winding column unit.The utility model improves the efficiency and power density of magnetic component by magnetic integration technology.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and relates to, but is not limited to, a magnetic core structure, integrated magnetic components, and a multi-port DC-DC converter. Background Technology

[0002] Converter topologies and their efficient, high-power power conversion technologies are the core of power conversion and energy transfer in power electronic systems. Research on their derivation and formation methods has been conducted for decades, accompanying the development of power electronics technology and resulting in a wealth of topology circuit achievements. Among them, the phase-shifted full-bridge converter, with its high efficiency, wide voltage regulation capability, and soft-switching characteristics of all switching devices, has gained widespread attention and application in aerospace, new energy storage, electric vehicles, and smart grids.

[0003] As an extension and derivative circuit of the traditional bridge phase-shift soft-switching converter, the LLC resonant converter, through the rational design of the inductor and transformer core components of the resonant cavity, can not only achieve zero-voltage switching and zero-current shutdown with an efficiency of over 98%, but also achieve a wide voltage regulation range through composite coordination strategies such as pulse width modulation + phase shift or frequency modulation control. This enables it to support applications such as photovoltaics, supercapacitors, and fuel cells that require wide voltage gain and high-efficiency power conversion. With the increasing penetration of new energy sources and the diversified development of DC loads, traditional single-port resonant soft-switching converters are unable to meet the requirements of multi-source coordination, bidirectional energy flow, and dynamic power distribution. Therefore, multi-port converters based on full-bridge switching network multiplexing are increasingly showing their important application value due to their advantages such as fewer switching devices and high conversion efficiency. However, this type of multi-port converter still has obvious defects such as a large number of magnetic devices and disadvantages in size and weight, which have become one of the main bottlenecks restricting its industrial expansion and application. Utility Model Content

[0004] In view of this, the present invention provides a magnetic core structure, integrated magnetic components, and a multi-port DC-DC converter. The aim is to improve the efficiency and power density of the magnetic components through magnetic integration technology.

[0005] The specific technical solution of this utility model embodiment is as follows: In a first aspect, the present invention provides a magnetic core structure, comprising: a top magnetic core and a bottom magnetic core that are identical and symmetrically spliced ​​together; On each side of the top and bottom magnetic cores, there is a central winding unit and multiple edge winding units; the central winding unit is located at the center of the magnetic core, and the multiple edge winding units are distributed at equal distances at the edges of the magnetic core. Multiple through-cuts are provided on the edges of the top magnetic core and the bottom magnetic core. Each through-cut corresponds to one of the multiple edge winding pillar units. Each through-cut is provided close to one side of the corresponding edge winding pillar unit.

[0006] In one possible implementation, the edge-pillar unit has a first curved surface on the side facing the central-pillar unit, and the central-pillar unit has a second curved surface on the side facing each of the edge-pillar units, wherein the curvature of the first curved surface is the same as that of the second curved surface.

[0007] In one possible implementation, the side of the edge-wound unit away from the center-wound unit has the same shape as the edge of the magnetic core and is located in the same vertical plane.

[0008] In one possible implementation, the central winding unit on the top magnetic core is exactly the same as the central winding unit on the bottom magnetic core, and they are connected accordingly. The plurality of edge winding units on the top magnetic core are identical to the plurality of edge winding units on the bottom magnetic core, and are connected in a one-to-one correspondence.

[0009] In one possible implementation, the permeability of the central post unit differs from that of the plurality of edge post units.

[0010] In one possible implementation, the through cut is rectangular.

[0011] In one possible implementation, the multiple through-cuts of the top magnetic core correspond one-to-one with the multiple through-cuts of the bottom magnetic core, and the two through-cuts that correspond one-to-one are located on the same vertical line.

[0012] In one possible implementation, the multiple through-cuts of the top magnetic core correspond one-to-one with the multiple through-cuts of the bottom magnetic core, and the two through-cuts that correspond one-to-one are not located on the same vertical line.

[0013] Secondly, this utility model embodiment provides an integrated magnetic component, including: transformer T1 and transformer T2 and output filter inductor L. p ; The transformer T1 is composed of a first primary winding and a first secondary winding, which are wound asymmetrically on the two edge winding units located on the first diagonal of any of the above-described magnetic core structures. The transformer T2 is composed of a second primary winding and a second secondary winding, which are wound in an asymmetrical manner on the two edge winding units located on the second diagonal of any of the above-described magnetic core structures. The output filter inductor L pIt is composed of a central winding unit with a third winding wound in any of the above-described magnetic core structures.

[0014] Thirdly, this utility model embodiment provides a multi-port DC-DC converter, including: the integrated magnetic component described above, multiple field-effect transistors V1, V2, V3 and V4, and a power supply; The first terminal of the power supply is connected to the first terminal of V1, the second terminal of the power supply is connected to the first terminal of V3, the second terminal of V1 is connected to the second terminal of V3, the first terminal of V2 is connected to the first terminal of V1, the second terminal of V2 is connected to the first terminal of V4, and the second terminal of V4 is connected to the first terminal of V3. The first end of the first primary winding of the transformer T1 in the integrated magnetic component is connected to the second end of V2, the second end of the first primary winding of the transformer T1 in the integrated magnetic component is connected to the second end of V1, and the first end of the first secondary winding of the transformer T1 in the integrated magnetic component is connected to the output filter inductor L in the integrated magnetic component. p The first terminal is connected to the output filter inductor L. p The second end, together with the second end of the first secondary winding of the transformer T1 in the integrated magnetic component, forms the output port V. o1 ; The first end of the second primary winding of the transformer T2 in the integrated magnetic component is connected to the first end of V4, and the second end of the second primary winding of the transformer T2 in the integrated magnetic component is connected to the second end of V4. The first end of the second secondary winding of the transformer T2 in the integrated magnetic component and the second end of the second secondary winding of the transformer T2 in the integrated magnetic component constitute the output port V. o2 .

[0015] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following: This utility model provides a magnetic core structure, integrated magnetic components, and a multi-port DC-DC converter. The magnetic core structure includes: a top magnetic core and a bottom magnetic core that are identical and symmetrically spliced; a central winding unit and multiple edge winding units are provided on opposite sides of the top and bottom magnetic cores; the central winding unit is located at the center of the magnetic core, and the multiple edge winding units are distributed at equal distances at the edges of the magnetic cores; multiple through-cuts are provided on the edges of the top and bottom magnetic cores, and the multiple through-cuts correspond one-to-one with the multiple edge winding units, with each through-cut closely attached to one side of the corresponding edge winding unit. Thus, on the one hand, based on a simple core structure consisting of identical and symmetrically spliced ​​top and bottom cores, a more versatile core structure (integrated magnetic component) is provided by utilizing the positive / reverse coupling or decoupling integration design of the multi-winding units of the flexible matching core structure (integrated magnetic component). On the other hand, by leveraging the flexible and varied structural design concept of this core structure, the winding positions and structures of the discrete magnetic element windings in the integrated magnetic component formed by this core structure can be adjusted. This not only allows for the flexible realization of two different magnetic integration effects, such as coupled integration and decoupling integration, but also simultaneously improves and enhances the efficiency and power density of the integrated magnetic component (multi-port DC-DC converter) with this core structure. Consequently, the integrated magnetic component (multi-port DC-DC converter) with this core structure can be more widely applied in various converter topologies. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 A schematic diagram of the overall structure of a magnetic core structure provided in an embodiment of this utility model; Figure 2 An exploded view of a magnetic core structure provided for an embodiment of this utility model; Figure 3 An exploded view of another magnetic core structure provided in this embodiment of the present invention; Figure 4 A schematic diagram illustrating the splicing process of a magnetic core structure provided in an embodiment of this utility model; Figure 5 A schematic diagram of the bottom magnetic core provided in an embodiment of this utility model; Figure 6 A circuit diagram of a multi-port DC-DC converter provided for an embodiment of this utility model.

[0017] Figure label: 1. Top core; 2. Bottom core; 3. Center winding unit; 4. Edge winding unit; 5. Through cut; 6. First curved surface; 7. Second curved surface. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] It should be noted that the terms "first, second, and third" used in the embodiments of this utility model are only used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first, second, and third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this utility model described herein can be implemented in an order other than that illustrated or described herein.

[0020] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which these embodiments pertain. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0021] As those skilled in the art should know, magnetic integration technology can wind multiple magnetic devices or multiple winding units into fewer magnetic cores. Therefore, it can be used as an important way and main method to improve the power density of power supplies. It has developed rapidly in recent years. With the development of planar magnetic technology and the application and promotion of PCB winding and flexible multilayer strip materials, magnetic integration technology is moving towards higher frequency, lighter weight and flatter design. At present, various integrated magnetic integration solutions have emerged in telecommunications, server and other application fields. By taking advantage of advanced chip-level packaging technology, the power density of power supplies has been increased to more than 1500 W / in3 and is constantly breaking new records. Considering the huge value of magnetic integration technology for improving converter efficiency, especially power density, and the fact that the relevant achievements are mainly concentrated in traditional converter topologies.

[0022] Based on this, the present invention provides a magnetic core structure, integrated magnetic components, and multi-port DC-DC converter using magnetic integration technology. By integrating the magnetic components, the efficiency and power density are simultaneously improved and enhanced.

[0023] like Figures 1 to 5 As shown, the magnetic core structure includes: a top magnetic core 1 and a bottom magnetic core 2 that are completely identical and symmetrically spliced ​​together.

[0024] A central winding unit 3 and multiple edge winding units 4 are provided on opposite sides of the top magnetic core 1 and the bottom magnetic core 2; the central winding unit 3 is located at the center of the magnetic core, and the multiple edge winding units 4 are distributed at equal distances at the edge of the magnetic core. Multiple through-cuts 5 are provided on the edges of the top magnetic core 1 and the bottom magnetic core 2. Each through-cut 5 corresponds to one of the multiple edge winding column units 4. Each through-cut 5 is provided close to one side of the corresponding edge winding column unit 4.

[0025] In one embodiment, continue as follows Figure 4 As shown in the figure, section 301 illustrates the top view of the two magnetic cores before they are joined. Both the top magnetic core 1 and the bottom magnetic core 2 are rectangular and symmetrical. On opposite sides of both the top and bottom magnetic cores, there is a central winding unit 3 and four edge winding units 4. The central winding unit 3 is located on the central axis of its respective magnetic core, and the four edge winding units 4 are located at the four corners of their respective magnetic cores. Four through-cuts 5 are provided on both the top and bottom magnetic cores. When needed, they are joined according to… Figure 4 The 302 section splices together two magnetic cores, ultimately resulting in the following: Figure 4 The magnetic core structure shown in section 303.

[0026] After the windings are wound on the central winding unit 3 and the four edge winding units 4, magnetic lines of force that penetrate the air outside the windings will be formed, which is the air magnetic resistance. Therefore, each through cut 5 can be regarded as a large air gap window.

[0027] In one possible implementation, continue as follows Figure 2 As shown, the edge-shaped pillar unit 4 has a first curved surface 6 on the side facing the center-shaped pillar unit 3, and the center-shaped pillar unit 3 has a second curved surface 7 on the side facing each of the edge-shaped pillar units 4. The curvature of the first curved surface 6 is the same as that of the second curved surface 7.

[0028] In one embodiment, continue as follows Figure 5As shown, each of the four edge winding units 4 has a first curved surface 6 on the side facing the central winding unit 3, and the central winding unit 3 also has a second curved surface 7 on the side facing the four edge winding units 4. The first curved surface 6 and the second curved surface 7 have the same curvature, which makes the wire distribution uniform during winding, reduces stress concentration during winding, and the curved surface design results in less stress at the corners, making the wire less prone to deformation and improving the winding quality.

[0029] In one possible implementation, continue as follows Figure 2 As shown, the side of the edge-wound post unit 4 away from the center-wound post unit 3 has the same shape as the edge of the magnetic core and is located in the same vertical plane. In one embodiment, four edge-wound pillar units 4 are located at the four corners of the magnetic core, and the side away from the central-wound pillar unit 3 is also in the shape of a right-angled prism, which is on the same vertical plane as the sidewall of the magnetic core, making it convenient for installation.

[0030] In one possible implementation, continue as follows Figure 2 As shown, the central winding unit 3 on the top magnetic core 1 is exactly the same as the central winding unit 3 on the bottom magnetic core 2, and they are connected accordingly. The plurality of edge winding units 4 on the top magnetic core 1 are exactly the same as the plurality of edge winding units 4 on the bottom magnetic core 2, and are connected in a one-to-one correspondence.

[0031] In one embodiment, the shape, size and position of a central winding unit 3 on the top magnetic core 1 and the four edge winding units 4 are exactly the same as those on the bottom magnetic core 2. When splicing them together, they can be connected one by one and fit perfectly.

[0032] In one possible implementation, the permeability of the central post unit 3 is different from that of the plurality of edge post units 4.

[0033] In one embodiment, the four edge winding units 4 and the center winding unit 3 have different permeabilities, with the center winding unit 3 having a smaller permeability. Therefore, the transformer windings wound at the four diagonal positions can achieve variable decoupling magnetic integration through the middle low magnetic resistance center winding unit.

[0034] In one possible implementation, continue as follows Figure 2 As shown, the through cut 5 is rectangular.

[0035] In one embodiment, the rectangular arrangement of the through-cut 5 facilitates installation, and each through-cut 5 is distributed on the right side of the winding post. After the winding is wound on the winding post, magnetic lines of force will be formed through the air outside the winding, which is the air magnetic resistance. Therefore, each through-cut 5 can be regarded as a large air gap window, and the density of the air magnetic lines of force outside the winding can be adjusted by controlling the width of the through-cut 5, thereby adjusting the parameters of the inductor and transformer.

[0036] In one possible implementation, continue as follows Figure 2 As shown, the multiple through cuts 5 of the top magnetic core 1 correspond one-to-one with the multiple through cuts 5 of the bottom magnetic core 2, and the two through cuts 5 that correspond one-to-one are located on the same vertical line.

[0037] In one embodiment, this structure can be applied to unidirectional winding, with the four edge winding units 4 of the top magnetic core 1 and the four edge winding units 4 of the bottom magnetic core 2 being symmetrical. At the same time, the four through cuts 5 of the top magnetic core 1 and the four through cuts 5 of the bottom magnetic core 2 are also in symmetrical positions, so that the two through cuts 5 that correspond to each other are located on the same vertical line. These eight through cuts 5 can be used to adjust the coupling relationship and coupling coefficient between the windings on each edge winding unit, and can also be used to install the core skeleton of the integrated magnetic component or other structural devices for fixing the magnetic core.

[0038] In one possible implementation, continue as follows Figure 3 As shown, the multiple through-cuts 5 of the top magnetic core 1 correspond one-to-one with the multiple through-cuts 5 of the bottom magnetic core 2, and the two through-cuts 5 that correspond one-to-one are not located on the same vertical line.

[0039] In one embodiment, this structure can be applied to counter-winding, where the four edge winding units 4 of the top core 1 and the four edge winding units 4 of the bottom core 2 are symmetrical. At the same time, the four through-cuts 5 of the top core 1 and the four through-cuts 5 of the bottom core 2 correspond one-to-one, but are located in asymmetrical positions, so that the two through-cuts 5 that correspond one-to-one are not on the same vertical line. These eight through-cuts 5 can be used to adjust the coupling relationship and coupling coefficient between the windings on each edge winding unit, and can also be used to assemble structural devices such as transformer frames to fix the core. Furthermore, since the through-cuts 5 of the top core 1 and the through-cuts 5 of the bottom core 2 are asymmetrical and not in the same vertical position, it is beneficial to improve the air gap diffusion flux, thereby reducing the eddy current loss of the integrated core.

[0040] Using the same inventive concept, this application also provides an integrated magnetic component, including: transformers T1 and T2 and an output filter inductor L. p ; The transformer T1 is composed of a first primary winding and a first secondary winding, which are wound asymmetrically on the two edge winding units located on the first diagonal of the magnetic core structure. The transformer T2 is composed of a second primary winding and a second secondary winding, which are wound asymmetrically on the two edge winding units located on the second diagonal of the magnetic core structure described above. The output filter inductor L p It is composed of a third winding wound around a central post unit in the aforementioned magnetic core structure.

[0041] In one embodiment, the two transformers T1 and T2 are wound in two diagonally opposite edge-pillar units of four edge-pillar units, respectively. That is, the primary and secondary windings of each transformer are wound asymmetrically in the edge-pillar units on the diagonal. Due to the asymmetrical arrangement of the primary and secondary windings of the transformers, their leakage inductance can be used as the resonant inductance L connected in series with the primary windings of T1 and T2. r1 and L r2 That is, the resonant inductance L r1 and L r2 Integration is achieved through the rational design of the leakage inductance on the primary and secondary sides of the transformer, with the output filter inductor L... p It is wound around the central pillar unit.

[0042] The output filter inductor L p The transformer T1 and the resonant inductor L are in a decoupled magnetic integration relationship. r1 and L r2 It is then magnetically coupled to the two transformers T1 and T2 respectively.

[0043] Corresponding to the aforementioned embodiments of magnetic core structure and integrated magnetic components, this application also provides embodiments of multi-port DC-DC converters using the integrated magnetic components.

[0044] like Figure 6 As shown, this application also provides a multi-port DC-DC converter, including: an integrated magnetic component, multiple field-effect transistors V1, V2, V3 and V4, and a power supply; The first terminal of the power supply is connected to the first terminal of V1, the second terminal of the power supply is connected to the first terminal of V3, the second terminal of V1 is connected to the second terminal of V3, the first terminal of V2 is connected to the first terminal of V1, the second terminal of V2 is connected to the first terminal of V4, and the second terminal of V4 is connected to the first terminal of V3. The first end of the first primary winding of the transformer T1 in the integrated magnetic component is connected to the second end of V2, the second end of the first primary winding of the transformer T1 in the integrated magnetic component is connected to the second end of V1, and the first end of the first secondary winding of the transformer T1 in the integrated magnetic component is connected to the output filter inductor L in the integrated magnetic component. p The first terminal is connected to the output filter inductor L. p The second end, together with the second end of the first secondary winding of the transformer T1 in the integrated magnetic component, forms the output port V. o1 ; The first end of the second primary winding of the transformer T2 in the integrated magnetic component is connected to the first end of V4, and the second end of the second primary winding of the transformer T2 in the integrated magnetic component is connected to the second end of V4. The first end of the second secondary winding of the transformer T2 in the integrated magnetic component and the second end of the second secondary winding of the transformer T2 in the integrated magnetic component constitute the output port V. o2 .

[0045] In one embodiment, the multi-port DC-DC converter achieves two-port output by multiplexing four full-bridge MOSFETs V1, V2, V3, and V4, where V... o1 and V o2 A second-level topology, such as a Buck converter, can be cascaded to achieve independent voltage regulation functions.

[0046] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of the present invention, the sequence number of the above-described processes does not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The sequence numbers of the above-described embodiments of the present invention are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0047] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0048] In the several embodiments provided by this utility model, it should be understood that the disclosed methods can be implemented in other ways. The methods disclosed in the several method embodiments provided by this utility model can be arbitrarily combined without conflict to obtain new method embodiments. The features disclosed in the several method embodiments provided by this utility model can be arbitrarily combined without conflict to obtain new method embodiments.

[0049] The above description is merely an embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A magnetic core structure, characterized in that, include: Identical and symmetrically joined top and bottom magnetic cores; On each side of the top and bottom magnetic cores, there is a central winding unit and multiple edge winding units; the central winding unit is located at the center of the magnetic core, and the multiple edge winding units are distributed at equal distances at the edges of the magnetic core. Multiple through-cuts are provided on the edges of the top magnetic core and the bottom magnetic core. Each through-cut corresponds to one of the multiple edge winding pillar units. Each through-cut is provided close to one side of the corresponding edge winding pillar unit.

2. The magnetic core structure according to claim 1, characterized in that, The edge-shaped pillar unit has a first curved surface on the side facing the center pillar unit, and the center pillar unit has a second curved surface on the side facing each of the edge-shaped pillar units. The curvature of the first curved surface is the same as that of the second curved surface.

3. The magnetic core structure according to claim 1, characterized in that, The side of the edge winding unit away from the center winding unit has the same shape as the edge of the magnetic core and is located in the same vertical plane.

4. The magnetic core structure according to claim 1, characterized in that, The central winding unit on the top magnetic core is exactly the same as the central winding unit on the bottom magnetic core, and they are connected accordingly. The plurality of edge winding units on the top magnetic core are identical to the plurality of edge winding units on the bottom magnetic core, and are connected in a one-to-one correspondence.

5. The magnetic core structure according to claim 1, characterized in that, The permeability of the central winding unit is different from that of the plurality of edge winding units.

6. The magnetic core structure according to claim 1, characterized in that, The through cut is rectangular.

7. The magnetic core structure according to any one of claims 1 to 6, characterized in that, The multiple through-cuts in the top magnetic core correspond one-to-one with the multiple through-cuts in the bottom magnetic core, and the two through-cuts that correspond to each other are located on the same vertical line.

8. The magnetic core structure according to any one of claims 1 to 6, characterized in that, The multiple through-cuts in the top magnetic core correspond one-to-one with the multiple through-cuts in the bottom magnetic core, and the two through-cuts that correspond one-to-one are not located on the same vertical line.

9. An integrated magnetic component, characterized in that, include: Transformer T1 and transformer T2 and output filter inductor L p ; The transformer T1 is composed of a first primary winding and a first secondary winding, which are wound asymmetrically on the two edge winding units where the first diagonal line of the magnetic core structure described in any one of claims 1 to 8 is located. The transformer T2 is composed of a second primary winding and a second secondary winding, which are wound in an asymmetrical manner on the two edge winding units where the second diagonal line of the magnetic core structure described in any one of claims 1 to 8 is located. The output filter inductor L p It is composed of a central winding unit with a third winding wound in any one of the magnetic core structures described in claims 1 to 8.

10. A multi-port DC-DC converter, characterized in that, include: The integrated magnetic component of claim 9 includes a plurality of field-effect transistors V1, V2, V3 and V4, and a power supply; The first terminal of the power supply is connected to the first terminal of V1, the second terminal of the power supply is connected to the first terminal of V3, the second terminal of V1 is connected to the second terminal of V3, the first terminal of V2 is connected to the first terminal of V1, the second terminal of V2 is connected to the first terminal of V4, and the second terminal of V4 is connected to the first terminal of V3. The first end of the first primary winding of the transformer T1 in the integrated magnetic component is connected to the second end of V2, the second end of the first primary winding of the transformer T1 in the integrated magnetic component is connected to the second end of V1, and the first end of the first secondary winding of the transformer T1 in the integrated magnetic component is connected to the output filter inductor L in the integrated magnetic component. p The first terminal is connected to the output filter inductor L. p The second end, together with the second end of the first secondary winding of the transformer T1 in the integrated magnetic component, forms the output port V. o1 ; The first end of the second primary winding of the transformer T2 in the integrated magnetic component is connected to the first end of V4, and the second end of the second primary winding of the transformer T2 in the integrated magnetic component is connected to the second end of V4. The first end of the second secondary winding of the transformer T2 in the integrated magnetic component and the second end of the second secondary winding of the transformer T2 in the integrated magnetic component constitute the output port V. o2 .

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