Magnetic assembly

Abstract

The utility model relates to a magnetic assembly, which comprises a magnetic core, at least two groups of windings and a magnetic covering part, the magnetic core comprises a magnetic core body and a hollow part, the hollow part penetrates through the magnetic core body, at least two groups of winding wires respectively surround the magnetic core body, and each winding wire at least partially penetrates through the hollow part. At least part of the at least two groups of windings are located between at least part of the magnetic covering part and the other part of the magnetic covering part.

Description

Technical Field

[0001] The present disclosure relates to the field of power electronics, and in particular to a magnetic component. Background Art

[0002] Currently, the filter circuit in the power supply is used to suppress the electromagnetic interference generated when the switch is switched, and the filter circuit includes two-stage filter modules, the first-stage filter module includes a common-mode inductor (i.e., a common-mode magnetic component) and an X capacitor, and the second-stage filter module includes a differential-mode inductor (i.e., a differential-mode magnetic component) and a Y capacitor, and both stages of the filter modules are inserted on the main circuit board, wherein the filter circuit uses the differential-mode inductor to suppress the electromagnetic interference differential-mode noise. However, the filter circuit includes two magnetic components and has a two-stage structure, which makes it larger in size and has a larger number of components, resulting in a larger size of the overall power supply and cannot be miniaturized.

[0003] Therefore, how to develop a magnetic component that overcomes the above-mentioned shortcomings is an urgent need at present. Utility Model Content

[0004] The purpose of the present disclosure is to provide a magnetic component, wherein the first winding and the second winding are located between a part of the magnetic covering portion and another part of the magnetic covering portion, so that the magnetic component utilizes the arrangement of the magnetic covering portion to improve the leakage inductance and impedance in high-frequency applications, and achieves the function of suppressing differential mode noise, and the magnetic component of the present disclosure is a single component, so that its volume is small and the number of components is small, so that the volume of the power supply using the magnetic component of the present disclosure is also small, and it is easier to achieve miniaturization and improve power density, while improving power efficiency. In addition, the magnetic component of the present disclosure can utilize a method of reducing the number of soft magnetic sheets so that it only covers two sides of the magnetic core body, so that the coating method formed by the soft magnetic sheets of the magnetic component of the present disclosure is an open structure, so the heat dissipation capacity of the magnetic component is preferred, and the overall temperature of the power supply using the magnetic component can be reduced.

[0005] To achieve the above-mentioned purpose, an embodiment of the present disclosure is a magnetic component, comprising a magnetic core, at least two sets of windings, and a magnetic covering portion. The magnetic core comprises a magnetic core body and a hollow portion, and the hollow portion penetrates the magnetic core body. At least two sets of windings are respectively surrounded by the magnetic core body, wherein each winding is at least partially disposed in the hollow portion. At least part of the at least two sets of windings are located between at least part of the magnetic covering portion and another part of the magnetic covering portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1A It is a structural schematic diagram of a magnetic component according to a first embodiment of the present disclosure;

[0007] Figure 1B for Figure 1A An exploded schematic diagram of the magnetic assembly shown;

[0008] Figure 2A It is a structural schematic diagram of a magnetic component according to a second embodiment of the present disclosure;

[0009] Figure 2B for Figure 2A An exploded schematic diagram of the magnetic assembly shown;

[0010] Figure 3A It is a structural schematic diagram of a magnetic assembly according to a third embodiment of the present disclosure;

[0011] Figure 3B for Figure 3A An exploded schematic diagram of the magnetic assembly shown;

[0012] Figure 4A It is a structural schematic diagram of a magnetic assembly according to a fourth embodiment of the present disclosure;

[0013] Figure 4B for Figure 4A An exploded schematic diagram of the magnetic assembly shown;

[0014] Figure 5A is a structural schematic diagram of a magnetic assembly according to a fifth embodiment of the present disclosure;

[0015] Figure 5B for Figure 5A An exploded schematic diagram of the magnetic assembly shown;

[0016] Fig. 6A It is a structural schematic diagram of a magnetic assembly according to a sixth embodiment of the present disclosure;

[0017] Figure 6B for Fig. 6A An exploded schematic diagram of the magnetic assembly shown;

[0018] Fig. 7A is a schematic structural diagram of a magnetic assembly according to a seventh embodiment of the present disclosure;

[0019] Figure 7B for Fig. 7A An exploded schematic diagram of the magnetic assembly shown;

[0020] Fig. 8A is a schematic structural diagram of a magnetic assembly according to an eighth embodiment of the present disclosure;

[0021] Figure 8B for Fig. 8A An exploded schematic diagram of the magnetic assembly shown;

[0022] Fig. 9 It is a schematic diagram of the exploded structure of the magnetic assembly of the ninth embodiment of the present disclosure;

[0023] Fig. 10Ais a structural schematic diagram of a magnetic assembly according to a tenth embodiment of the present disclosure;

[0024] Fig. 10B for Fig. 10A An exploded schematic diagram of the magnetic assembly shown;

[0025] Fig.11A is a structural schematic diagram of a magnetic assembly according to an eleventh embodiment of the present disclosure;

[0026] Fig. 11B for Fig.11A An exploded schematic diagram of the magnetic assembly shown;

[0027] Fig. 12A is a structural schematic diagram of a magnetic assembly according to a twelfth embodiment of the present disclosure;

[0028] Fig. 12B for Fig. 12A An exploded schematic diagram of the magnetic assembly shown;

[0029] Fig.13A is a schematic structural diagram of a magnetic assembly according to a thirteenth embodiment of the present disclosure;

[0030] Fig. 13B for Fig.13A An exploded schematic diagram of the magnetic assembly shown;

[0031] Fig.14A is a voltage-frequency waveform diagram of a conventional magnetic component; and

[0032] Fig. 14B It is a voltage-frequency waveform diagram of the magnetic component disclosed in the present invention.

[0033] Description of reference numerals:

[0034] 1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1k, 1m: Magnetic component 2: Magnetic core

[0035] 21: Magnetic core body

[0036] 211: First side column

[0037] 212: Second side column

[0038] 213: First connecting column

[0039] 214: Second connecting column

[0040] 21a: Outer annulus

[0041] 21b: Inner annulus

[0042] 21c: First side

[0043] 21d: Second side

[0044] 22: Hollow part

[0045] 23: Gap

[0046] 3: First winding

[0047] 4: Second winding

[0048] 5: Magnetic covering

[0049] 51: The first soft magnetic sheet

[0050] 52: Second soft magnetic sheet

[0051] 53: The third soft magnetic sheet

[0052] 54: The fourth soft magnetic sheet

[0053] 55: First covering element

[0054] 56: Second covering element

[0055] 57: Opening

[0056] 6: Fixed part

[0057] 71: First interval

[0058] 72: Second interval

[0059] 8: Magnetic disk

[0060] 81: Partition

[0061] 82: Protrusion

[0062] 9: Base

[0063] 91: Bottom plate

[0064] 92: Positioning element

[0065] 93: First positioning groove

[0066] 94: Second positioning slot DETAILED DESCRIPTION

[0067] Some typical embodiments that embody the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can have various changes in different implementations without departing from the scope of the present disclosure, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present disclosure.

[0068] See also Figure 1A and Figure 1B ,in Figure 1A is a schematic structural diagram of a magnetic component according to a first embodiment of the present disclosure, Figure 1B for Figure 1A Schematic diagram of the exploded structure of the magnetic component shown in FIG. As shown in the figure, the magnetic component 1 of this embodiment includes a magnetic core 2, a first winding 3, a second winding 4 and a magnetic covering portion 5. The magnetic core 2 includes a magnetic core body 21 and a hollow portion 22. Figure 1B As shown, the magnetic core body 21 of the present embodiment is a hollow rectangular body, and includes a first side column 211, a second side column 212, a first connecting column 213 and a second connecting column 214. The first side column 211 and the second side column 212 are arranged opposite to each other, and the first connecting column 213 and the second connecting column 214 are arranged opposite to each other, wherein the first connecting column 213 is connected between the first end of the first side column 211 and the first end of the second side column 212, and the second connecting column 214 is connected between the second end of the first side column 211 and the second end of the second side column 212. The hollow portion 22 runs through the magnetic core body 21, for example, runs through the center position of the magnetic core body 21, is located between the first side column 211 and the second side column 212, and is located between the first connecting column 213 and the second connecting column 214.

[0069] The first winding 3 surrounds a portion of the magnetic core body 21, for example, surrounds the first side column 211 of the magnetic core body 21, and a portion of the first winding 3 is disposed through the hollow portion 22 and is located on one side of the magnetic core body 21. The second winding 4 surrounds another portion of the magnetic core body 21, for example, surrounds the second side column 212 of the magnetic core body 21, and a portion of the second winding 4 is disposed through the hollow portion 22 and is located on the other side of the magnetic core body 21. In this embodiment, a gap 23 is provided between the first winding 3 located in the hollow portion 22 and the second winding 4 located in the hollow portion 22.

[0070] The magnetic covering portion 5 may be, but is not limited to, a bendable soft magnetic sheet or magnetic tape, the thickness of which is less than 1.5 mm, and is made of insulating material. In this embodiment, the magnetic covering portion 5 includes a first soft magnetic sheet 51, a second soft magnetic sheet 52, a third soft magnetic sheet 53, and a fourth soft magnetic sheet 54, the first soft magnetic sheet 51 and the second soft magnetic sheet 52 are arranged oppositely, the third soft magnetic sheet 53 and the fourth soft magnetic sheet 54 are arranged oppositely, and are located between the first soft magnetic sheet 51 and the second soft magnetic sheet 52, wherein the first soft magnetic sheet 51, the second soft magnetic sheet 52, the third soft magnetic sheet 53, and the fourth soft magnetic sheet 54 are an integrally formed structure. The first soft magnetic sheet 51, the third soft magnetic sheet 53, the second soft magnetic sheet 52 and the fourth soft magnetic sheet 54 of the magnetic covering part 5 are coated and attached to the first winding 3 and the second winding 4, and surround the first side column 211 and the second side column 212 of the magnetic core body 21, wherein the first winding 3 is located between the first side column 211 of the magnetic core body 21 and the first soft magnetic sheet 51 of the magnetic covering part 5, between the first side column 211 of the magnetic core body 21 and the second soft magnetic sheet 52 of the magnetic covering part 5, and between the first side column 211 of the magnetic core body 21 and the third soft magnetic sheet 53 of the magnetic covering part 5, and the second winding 4 is located between the second side column 212 of the magnetic core body 21 and the first soft magnetic sheet 51 of the magnetic covering part 5, between the second side column 212 of the magnetic core body 21 and the second soft magnetic sheet 52 of the magnetic covering part 5, and between the second side column 212 of the magnetic core body 21 and the fourth soft magnetic sheet 54 of the magnetic covering part 5. In this embodiment, the first winding 3 is located between the third soft magnetic sheet 53 of the magnetic covering portion 5 and the second winding 4, and the second winding 4 is located between the fourth soft magnetic sheet 54 of the magnetic covering portion 5 and the first winding 3. In this embodiment, the first soft magnetic sheet 51, the second soft magnetic sheet 52, the third soft magnetic sheet 53 and the fourth soft magnetic sheet 54 of the magnetic covering portion 5 are not arranged in the hollow portion 22, and the gap 23 between the first winding 3 and the second winding 4 is not arranged. In this embodiment, the magnetic permeability, the number of internal structure layers, the cross-sectional area and the number of turns of the magnetic covering portion 5 are correlated with the leakage inductance of the magnetic component 1. The magnetic component 1 can adjust the overall leakage inductance of the magnetic component 1 by changing the magnetic permeability, the number of internal structure layers, the cross-sectional area and the number of turns of the magnetic covering portion 5. In one embodiment, the magnetic component 1 includes a fixing bracket (not shown) for fixing the magnetic core 2, for example, the second connecting column 214 of the magnetic core body 21 of the magnetic core 2 is arranged on the fixing bracket, so that the magnetic core 2 can be fixed on the fixing bracket.

[0071] As can be seen from the above, the first winding 3 and the second winding 4 of the magnetic component 1 of the present invention are located between a portion of the magnetic covering portion 5 and another portion of the magnetic covering portion 5, so that the magnetic component 1 utilizes the setting of the magnetic covering portion 5 to enhance the leakage inductance and the impedance during high-frequency applications, and achieves the function of suppressing differential-mode noise. Compared with the traditional filtering circuit that utilizes two magnetic components (a common-mode magnetic component and a differential-mode magnetic component) to achieve the function of suppressing differential-mode noise, the magnetic component 1 of the present invention is a single component, which makes it smaller in size and has fewer components, so that the power supply using the magnetic component 1 of the present invention is also smaller in size, which makes it easier to achieve miniaturization and improve power density, while improving power efficiency.

[0072] In some embodiments, the way in which the magnetic covering portion 5 covers the first winding 3 and the second winding 4 can be adjusted. Figure 2A and Figure 2B ,in Figure 2A is a schematic structural diagram of a magnetic component according to a second embodiment of the present disclosure, Figure 2B for Figure 2A The exploded structure diagram of the magnetic component is shown in FIG. Figure 1A and Figure 1B In the magnetic component 1 shown, the third soft magnetic sheet 53, the first soft magnetic sheet 51, the fourth soft magnetic sheet 54 and the second soft magnetic sheet 52 of the magnetic covering portion 5 of the magnetic component 1a of this embodiment surround the first side column 211, the first connecting column 213, the second side column 212 and the second connecting column 214, wherein the first winding 3 is located between the first side column 211 of the magnetic core body 21 and the third soft magnetic sheet 53 of the magnetic covering portion 5, and the second winding 4 is located between the second side column 212 of the magnetic core body 21 and the fourth soft magnetic sheet 54 of the magnetic covering portion 5. In this embodiment, the first winding 3 is located between the third soft magnetic sheet 53 of the magnetic covering portion 5 and the second winding 4, and the second winding 4 is located between the fourth soft magnetic sheet 54 of the magnetic covering portion 5 and the first winding 3.

[0073] See also Figure 3A and Figure 3B ,in Figure 3A is a schematic structural diagram of a magnetic assembly according to a third embodiment of the present disclosure, Figure 3B for Figure 3A The exploded structure diagram of the magnetic component is shown in FIG. Figure 1A and Figure 1BIn the magnetic component 1 shown, the first soft magnetic sheet 51, the third soft magnetic sheet 53, the second soft magnetic sheet 52 and the fourth soft magnetic sheet 54 of the magnetic covering portion 5 of the magnetic component 1b of this embodiment surround the first connecting column 213 and the second connecting column 214, wherein the first winding 3 is located between the first side column 211 of the magnetic core body 21 and the first soft magnetic sheet 51 of the magnetic covering portion 5 and between the first side column 211 of the magnetic core body 21 and the second soft magnetic sheet 52 of the magnetic covering portion 5, and the second winding 4 is located between the second side column 212 of the magnetic core body 21 and the first soft magnetic sheet 51 of the magnetic covering portion 5 and between the second side column 212 of the magnetic core body 21 and the second soft magnetic sheet 52 of the magnetic covering portion 5. In this embodiment, the first winding 3 and the second winding 4 are respectively located between the third soft magnetic sheet 53 of the magnetic covering portion 5 and the fourth soft magnetic sheet 54 of the magnetic covering portion 5.

[0074] See also Figure 4A and Figure 4B ,in Figure 4A is a schematic structural diagram of a magnetic assembly according to a fourth embodiment of the present disclosure, Figure 4B for Figure 4A Schematic diagram of the exploded structure of the magnetic component shown. As shown in the figure, compared with the magnetic component 1 shown in Figures 1A and 1B, the magnetic covering portion 5 of the magnetic component 1c of this embodiment includes a first covering element 55 and a second covering element 56. The first covering element 55 surrounds the first side column 211 of the magnetic core body 21, and the first winding 3 is located between the first side column 211 of the magnetic core body 21 and the first covering element 55 of the magnetic covering portion 5. The second covering element 56 surrounds the second side column 212 of the magnetic core body 21, and the second winding 4 is located between the second side column 212 of the magnetic core body 21 and the second covering element 56 of the magnetic covering portion 5. In this embodiment, at least part of the first covering element 55 and at least part of the second covering element 56 are respectively penetrated in the hollow portion 22, and penetrated in the gap 23 between the first winding 3 and the second winding 4.

[0075] See also Figure 5A and Figure 5B ,in Figure 5A is a schematic structural diagram of a magnetic assembly according to a fifth embodiment of the present disclosure, Figure 5B for Figure 5AAs shown in the figure, compared with the magnetic core 2 of the magnetic component 1 shown in FIGS. 1A and 1B , the magnetic core body 21 of the magnetic core 2 of the magnetic component 1d of this embodiment is a circular ring. The first winding 3 is wrapped around a portion of the magnetic core body 21, and a portion of the first winding 3 is passed through the hollow portion 22, the second winding 4 is wrapped around another portion of the magnetic core body 21, and a portion of the second winding 4 is passed through the hollow portion 22, the first winding 3 and the second winding 4 are located on opposite sides of the magnetic core body 21 of the magnetic core 2 without contacting each other, wherein the first end 31 of the first winding 3 is located on the first side of the magnetic core body 21, the first end 41 of the second winding 4 is located on the first side of the magnetic core body 21, a first gap 71 is provided between the first end 31 of the first winding 3 and the first end 41 of the second winding 4, the second end 32 of the first winding 3 is located on the second side of the magnetic core body 21, the second end 42 of the second winding 4 is located on the second side of the magnetic core body 21, and a second gap 72 is provided between the second end 32 of the first winding 3 and the second end 42 of the second winding 4.

[0076] In the present embodiment, the magnetic core body 21 of the magnetic core 2 comprises an outer annular surface 21a, an inner annular surface 21b, a first side surface 21c and a second side surface 21d. The outer annular surface 21a surrounds the inner annular surface 21b, and the space surrounded by the inner annular surface 21b forms a hollow portion 22. The first side surface 21c and the second side surface 21d are arranged opposite to each other and are respectively connected between the outer annular surface 21a and the inner annular surface 21b. The first soft magnetic sheet 51, the third soft magnetic sheet 53, the second soft magnetic sheet 52 and the fourth soft magnetic sheet 54 of the magnetic covering portion 5 surround the outer annular surface 21a, the first side surface 21c and the second side surface 21d of the magnetic core body 21. In the present embodiment, the first spacer 71 and the second spacer 72 are respectively exposed to the outside of the magnetic component 1d through the two openings 57 located on both sides of the magnetic covering portion 5.

[0077] In some embodiments, the way in which the magnetic covering portion 5 covers the first winding 3 and the second winding 4 can be adjusted. Fig. 6A and Figure 6B ,in Fig. 6A is a schematic structural diagram of a magnetic assembly according to a sixth embodiment of the present disclosure, Figure 6B for Fig. 6A As shown in the figure, compared with the magnetic component 1d shown in Figures 5A and 5B, the first interval 71 and the second interval 72 of the magnetic component 1e of this embodiment are covered by the magnetic covering portion 5 and are not exposed to the outside of the magnetic component 1d, while the first winding 3 and the second winding 4 are respectively exposed to the outside of the magnetic component 1e through the two openings 57 located on both sides of the magnetic covering portion 5.

[0078] See also Fig. 7A and Figure 7B ,in Fig. 7A is a schematic structural diagram of a magnetic assembly according to a seventh embodiment of the present disclosure, Figure 7B for Fig. 7A Schematic diagram of the exploded structure of the magnetic component shown. As shown in the figure, compared with the magnetic component 1d shown in Figures 5A and 5B, the first soft magnetic sheet 51, the third soft magnetic sheet 53, the second soft magnetic sheet 52 and the fourth soft magnetic sheet 54 of the magnetic covering part 5 of the magnetic component 1f of this embodiment surround the outer annular surface 21a of the magnetic core body 21, wherein part of the first winding 3 is located between the outer annular surface 21a of the magnetic core body 21 and the first soft magnetic sheet 51 of the magnetic covering part 5, and part of the second winding 4 is located between the outer annular surface 21a of the magnetic core body 21 and the second soft magnetic sheet 52 of the magnetic covering part 5. And in this embodiment, the first winding 3 is located between the first soft magnetic sheet 51 and the second winding 4 of the magnetic covering part 5, and the second winding 4 is located between the second soft magnetic sheet 52 and the first winding 3 of the magnetic covering part 5.

[0079] See also Fig. 8A and Figure 8B ,in Fig. 8A is a schematic structural diagram of a magnetic assembly according to an eighth embodiment of the present disclosure, Figure 8B for Fig. 8A The exploded structure diagram of the magnetic component is shown in FIG. Figure 5A and Figure 5B In the magnetic component 1d shown, the magnetic covering portion 5 of the magnetic component 1g of this embodiment includes a first covering element 55 and a second covering element 56. The first covering element 55 surrounds the first winding 3, and the first winding 3 is located between the magnetic core body 21 and the first covering element 55 of the magnetic covering portion 5. The second covering element 56 surrounds the second winding 4, and the second winding 4 is located between the magnetic core body 21 and the second covering element 56 of the magnetic covering portion 5. In this embodiment, at least part of the first covering element 55 and at least part of the second covering element 56 are disposed in the hollow portion 22.

[0080] See also Fig. 9 ,in Fig. 9Schematic diagram of the exploded structure of the magnetic component of the ninth embodiment of the present disclosure. As shown in the figure, compared with the magnetic component 1e shown in Figures 6A and 6B, the magnetic component 1h of this embodiment further includes a magnetic sheet 8 and a base 9. The magnetic sheet 8 is disposed in the hollow portion 22 of the magnetic core 2, and includes a partition 81 and a protrusion 82. The extension direction of the partition 81 is from the first interval 71 to the second interval 72. The protrusion 82 is formed by the surface of the partition 81 extending in the direction perpendicular to the partition 81. The base 9 includes a bottom plate 91 and a plurality of positioning elements 92, wherein the plurality of positioning elements 92 extend from the surface of the bottom plate 91 in a direction perpendicular to the bottom plate 91, respectively, and the plurality of positioning elements 92 jointly define a first positioning groove 93 and a second positioning groove 94, wherein the first positioning groove 93 matches the partition 81 of the magnetic sheet 8, and the second positioning groove 94 matches the protrusion 82 of the magnetic sheet 8, wherein the partition 81 of the magnetic sheet 8 is arranged in the first positioning groove 93, and the protrusion 82 of the magnetic sheet 8 is arranged in the second positioning groove 94, and the magnetic sheet 8 is tightly fitted between the plurality of positioning elements 92 using the partition 81 and the protrusion 82 to be connected to the base 9.

[0081] In some embodiments, in order to improve the heat dissipation capability, the number of soft magnetic sheets in the magnetic covering portion can be adjusted. Fig. 10A and Fig. 10B ,in Fig. 10A is a schematic structural diagram of a magnetic assembly according to a tenth embodiment of the present disclosure, Fig. 10B for Fig. 10A The exploded structure diagram of the magnetic component is shown in FIG. Figure 5A and Figure 5B The magnetic component 1d shown includes four soft magnetic sheets, and the magnetic covering portion 5 of the magnetic component 1i of this embodiment includes only two soft magnetic sheets, namely the first soft magnetic sheet 51 and the second soft magnetic sheet 52, the first soft magnetic sheet 51 and the second soft magnetic sheet 52 are arranged opposite to each other, wherein the first soft magnetic sheet 51 covers the first side surface 21c of the magnetic core body 21, and the second soft magnetic sheet 52 covers the second side surface 21d of the magnetic core body 21. In this embodiment, the first winding 3 and the second winding 4 are respectively located between the first soft magnetic sheet 51 and the second soft magnetic sheet 52. And in this embodiment, the magnetic component 1i also includes a fixing portion 6, which surrounds the outer side of the first soft magnetic sheet 51 and the outer side of the second soft magnetic sheet 52 to fix the first soft magnetic sheet 51 and the second soft magnetic sheet 52 to each other on the magnetic core body 21 of the magnetic core 2. Since the number of soft magnetic sheets in this embodiment is reduced and only two sides of the magnetic core body 21 are covered, the soft magnetic sheets of the magnetic component 1d in this embodiment are formed in an open structure, so the heat dissipation capacity of the magnetic component 1d is preferred, thereby reducing the overall temperature of the power supply using the magnetic component 1d. In this embodiment, the fixing portion 6 is a sticky substance, such as an adhesive tape, but is not limited thereto.

[0082] See also Fig.11A and Fig. 11B ,in Fig.11A is a schematic structural diagram of a magnetic assembly according to an eleventh embodiment of the present disclosure, Fig. 11B for Fig.11A The exploded structure diagram of the magnetic component is shown in FIG. Fig. 10A and Fig. 10B The magnetic component 1i shown, the magnetic component 1j of this embodiment further includes a third soft magnetic sheet 53, and the third soft magnetic sheet 53 is connected between one end of the first soft magnetic sheet 51 and one end of the second soft magnetic sheet 52. In this embodiment, the fixing portion 6 surrounds the outer side of the first soft magnetic sheet 51, the outer side of the third soft magnetic sheet 53 and the outer side of the second soft magnetic sheet 52, so as to fix the first soft magnetic sheet 51, the third soft magnetic sheet 53 and the second soft magnetic sheet 52 to each other on the magnetic core body 21 of the magnetic core 2.

[0083] Of course, the location of the soft magnetic sheet can also be adjusted according to needs. Fig. 12A and Fig. 12B ,in Fig. 12A is a schematic structural diagram of a magnetic assembly according to a twelfth embodiment of the present disclosure, Fig. 12B for Fig. 12A The exploded structure diagram of the magnetic component is shown in FIG. Figure 5A and Figure 5B The magnetic component 1d shown includes four soft magnetic sheets, and the magnetic covering portion 5 of the magnetic component 1i of this embodiment includes only two soft magnetic sheets, namely the first soft magnetic sheet 51 and the second soft magnetic sheet 52, which are arranged opposite to each other, wherein the first soft magnetic sheet 51 and the second soft magnetic sheet 52 respectively cover the two sides of the outer annular surface 21a of the magnetic core body 21. In this embodiment, the first winding 3 is located between the second winding 4 and the first soft magnetic sheet 51, and the second winding 4 is located between the first winding 3 and the second soft magnetic sheet 52. In this embodiment, the magnetic component 1i also includes a fixing portion 6, which surrounds the outer side of the first soft magnetic sheet 51 and the outer side of the second soft magnetic sheet 52 to fix the first soft magnetic sheet 51 and the second soft magnetic sheet 52 to each other on the magnetic core body 21 of the magnetic core 2.

[0084] See also Fig.13A and Fig. 13B ,in Fig.13A is a schematic structural diagram of a magnetic assembly according to a thirteenth embodiment of the present disclosure, Fig. 13B for Fig.13A The exploded structure diagram of the magnetic component is shown in FIG. Fig. 12A and Fig. 12B The magnetic component 1k shown, the magnetic component 1m of this embodiment further includes a third soft magnetic sheet 53, the third soft magnetic sheet 53 is connected between one end of the first soft magnetic sheet 51 and one end of the second soft magnetic sheet 52, and the third soft magnetic sheet 53 is an arc-shaped structure.

[0085] See also Fig.14A and Fig. 14B ,in Fig.14A This is the voltage-frequency waveform of the traditional magnetic component. Fig. 14B The voltage frequency waveform of the magnetic component disclosed in the present invention is shown in FIG. According to the waveform, the noise of the conventional magnetic component is higher at low frequency, for example Fig.14A As shown, the maximum noise can reach 78dBuV, and the noise of the magnetic component disclosed in the present invention is lower at low frequencies, for example Fig. 14B As shown, the maximum noise is only 70dBuV, and it can be known that the structural arrangement of the magnetic component disclosed in the present invention can achieve the function of suppressing noise.

[0086] In summary, the first winding and the second winding of the magnetic component of the present invention are located between a part of the magnetic covering part and another part of the magnetic covering part, so that the magnetic component utilizes the setting of the magnetic covering part to improve the leakage inductance and the impedance in high-frequency applications, and achieves the function of suppressing differential mode noise, and the magnetic component of the present invention is a single component, so that its volume is small and the number of components is small, so that the volume of the power supply using the magnetic component of the present invention is also small, which is easier to achieve miniaturization and improve power density, while improving power efficiency. In addition, the magnetic component of the present invention can utilize a method of reducing the number of soft magnetic sheets so that it only covers two sides of the magnetic core body, so that the coating method formed by the soft magnetic sheets of the magnetic component of the present invention is an open structure, so the heat dissipation capacity of the magnetic component is better, and the overall temperature of the power supply using the magnetic component can be reduced.

Claims

1. A magnetic component, characterized in that: The magnetic assembly includes: A magnetic core, comprising a magnetic core body and a hollow portion, wherein the hollow portion penetrates the magnetic core body; At least two groups of windings are respectively wound around the magnetic core body, wherein each of the windings at least partially passes through the hollow portion; and A magnetic covering portion, wherein at least part of the at least two sets of windings are located between at least part of the magnetic covering portion and another part of the magnetic covering portion.

2. The magnetic assembly according to claim 1, characterized in that: The at least two groups of windings include a first winding and a second winding, the first winding surrounds a portion of the magnetic core body and is located on one side of the magnetic core body, the second winding surrounds a portion of the magnetic core body and is located on the other side of the magnetic core body, wherein the magnetic core body of the magnetic core includes a first side column, a second side column, a first connecting column and a second connecting column, the first side column and the second side column are arranged opposite to each other, the first connecting column and the second connecting column are arranged opposite to each other and are respectively connected between the first side column and the second side column, wherein the hollow portion is located between the first side column and the second side column, and between the first connecting column and the second connecting column, the first winding surrounds the first side column, and a portion of the first winding is passed through the hollow portion, the second winding surrounds the second side column, and a portion of the second winding is passed through the hollow portion.

3. The magnetic assembly according to claim 2, characterized in that: The magnetic covering portion includes a first soft magnetic sheet, a second soft magnetic sheet, a third soft magnetic sheet and a fourth soft magnetic sheet, the first soft magnetic sheet and the second soft magnetic sheet are arranged opposite to each other, the third soft magnetic sheet and the fourth soft magnetic sheet are arranged opposite to each other and are located between the first soft magnetic sheet and the second soft magnetic sheet, wherein the first soft magnetic sheet, the second soft magnetic sheet, the third soft magnetic sheet and the fourth soft magnetic sheet are an integrally formed structure.

4. The magnetic assembly according to claim 3, characterized in that: The first soft magnetic sheet, the third soft magnetic sheet, the second soft magnetic sheet and the fourth soft magnetic sheet of the magnetic covering part surround the first side column and the second side column, wherein the first winding is located between the first side column and the first soft magnetic sheet of the magnetic covering part, between the first side column and the second soft magnetic sheet of the magnetic covering part, and between the first side column and the third soft magnetic sheet of the magnetic covering part, the second winding is located between the second side column and the first soft magnetic sheet of the magnetic covering part, between the second side column and the second soft magnetic sheet of the magnetic covering part, and between the second side column and the fourth soft magnetic sheet of the magnetic covering part, and the first winding is located between the third soft magnetic sheet of the magnetic covering part and the second winding, and the second winding is located between the fourth soft magnetic sheet of the magnetic covering part and the first winding, wherein there is a gap between the first winding located in the hollow part and the second winding located in the hollow part, and the magnetic covering part is not penetrated through the gap.

5. The magnetic assembly according to claim 3, characterized in that: The third soft magnetic sheet, the first soft magnetic sheet, the fourth soft magnetic sheet and the second soft magnetic sheet of the magnetic covering part surround the first side column, the first connecting column, the second side column and the second connecting column, wherein the first winding is located between the first side column and the third soft magnetic sheet of the magnetic covering part, the second winding is located between the second side column and the fourth soft magnetic sheet of the magnetic covering part, and the first winding is located between the third soft magnetic sheet of the magnetic covering part and the second winding, and the second winding is located between the fourth soft magnetic sheet of the magnetic covering part and the first winding, wherein there is a gap between the first winding located in the hollow part and the second winding located in the hollow part, and the magnetic covering part is not penetrated through the gap.

6. The magnetic assembly according to claim 3, characterized in that: The first soft magnetic sheet, the third soft magnetic sheet, the second soft magnetic sheet and the fourth soft magnetic sheet of the magnetic covering part surround the first connecting column and the second connecting column, wherein the first winding is located between the first side column and the first soft magnetic sheet of the magnetic covering part and between the first side column and the second soft magnetic sheet of the magnetic covering part, the second winding is located between the second side column and the first soft magnetic sheet of the magnetic covering part and between the second side column and the second soft magnetic sheet of the magnetic covering part, and the first winding and the second winding are respectively located between the first soft magnetic sheet of the magnetic covering part and the second soft magnetic sheet of the magnetic covering part, wherein there is a gap between the first winding located in the hollow part and the second winding located in the hollow part, and the magnetic covering part is not penetrated through the gap.

7. The magnetic assembly according to claim 2, characterized in that: The magnetic covering portion includes a first covering element and a second covering element, the first covering element surrounds the first side column, the first winding is located between the first side column and the first covering element, the second covering element surrounds the second side column, the second winding is located between the second side column and the second covering element, wherein there is a gap between the first winding located in the hollow portion and the second winding located in the hollow portion, and at least part of the first covering element and at least part of the second covering element are respectively inserted into the gap.

8. The magnetic assembly according to claim 1, wherein: The at least two groups of windings include a first winding and a second winding. The magnetic core body of the magnetic core is a circular ring. The first winding surrounds a portion of the magnetic core body, and a portion of the first winding is passed through the hollow portion. The second winding surrounds another portion of the magnetic core body, and a portion of the second winding is passed through the hollow portion. The first winding and the second winding are located on opposite sides of the magnetic core body without contacting each other, wherein a first end of the first winding is located on a first side of the magnetic core body and a first end of the second winding is located on the first side of the magnetic core body, a first gap is formed between the first end of the first winding and the first end of the second winding, a second end of the first winding is located on a second side of the magnetic core body and a second end of the second winding is located on the second side of the magnetic core body, and a second gap is formed between the second end of the first winding and the second end of the second winding.

9. The magnetic assembly according to claim 8, characterized in that: The magnetic covering portion includes a first soft magnetic sheet, a second soft magnetic sheet, a third soft magnetic sheet and a fourth soft magnetic sheet, the first soft magnetic sheet and the second soft magnetic sheet are arranged opposite to each other, the third soft magnetic sheet and the fourth soft magnetic sheet are arranged opposite to each other and are located between the first soft magnetic sheet and the second soft magnetic sheet, wherein the first soft magnetic sheet, the second soft magnetic sheet, the third soft magnetic sheet and the fourth soft magnetic sheet are an integrally formed structure.

10. The magnetic assembly according to claim 9, characterized in that: The magnetic core body of the magnetic core includes an outer annular surface, an inner annular surface, a first side surface and a second side surface, the outer annular surface surrounds the inner annular surface, the first side surface and the second side surface are arranged opposite to each other and are respectively connected between the outer annular surface and the inner annular surface, the first soft magnetic sheet, the third soft magnetic sheet, the second soft magnetic sheet and the fourth soft magnetic sheet of the magnetic covering part surround the outer annular surface, the first side surface and the second side surface, wherein the first interval and the second interval are respectively exposed to the outside of the magnetic component through two openings of the magnetic covering part, wherein the magnetic covering part is not penetrated through the hollow part.

11. The magnetic assembly according to claim 9, characterized in that: The magnetic core body of the magnetic core includes an outer annular surface, an inner annular surface, a first side surface and a second side surface, the outer annular surface surrounds the inner annular surface, the first side surface and the second side surface are arranged opposite to each other and are respectively connected between the outer annular surface and the inner annular surface, the first soft magnetic sheet, the third soft magnetic sheet, the second soft magnetic sheet and the fourth soft magnetic sheet of the magnetic covering part surround the outer annular surface, the first side surface and the second side surface, wherein the first winding and the second winding are respectively exposed to the outside of the magnetic component through two openings of the magnetic covering part, wherein the magnetic covering part is not penetrated through the hollow part.

12. The magnetic assembly according to claim 9, characterized in that: The magnetic core body of the magnetic core includes an outer annular surface, an inner annular surface, a first side surface and a second side surface, the outer annular surface surrounds the inner annular surface, the first side surface and the second side surface are arranged opposite to each other and are respectively connected between the outer annular surface and the inner annular surface, the first soft magnetic sheet, the third soft magnetic sheet, the second soft magnetic sheet and the fourth soft magnetic sheet of the magnetic covering part surround the outer annular surface, wherein part of the first winding is located between the outer annular surface and the first soft magnetic sheet of the magnetic covering part, and part of the second winding is located between the outer annular surface and the second soft magnetic sheet of the magnetic covering part, wherein the first winding is located between the first soft magnetic sheet and the second winding of the magnetic covering part, and the second winding is located between the second soft magnetic sheet and the first winding of the magnetic covering part, wherein the magnetic covering part is not penetrated through the hollow part.

13. The magnetic assembly according to claim 8, characterized in that: The magnetic covering portion includes a first covering element and a second covering element, the first covering element surrounds the first winding, the first winding is located between the magnetic core body and the first covering element, the second covering element surrounds the second winding, the second winding is located between the magnetic core body and the second covering element, wherein at least part of the first covering element and at least part of the second covering element are respectively passed through the hollow portion.

14. The magnetic assembly according to claim 8, characterized in that The magnetic component includes a magnetic sheet and a base, the magnetic sheet is arranged in the hollow portion, and includes a partition and a protrusion, the extension direction of the partition is from the first interval toward the second interval, the protrusion is formed by a surface of the partition extending toward a direction perpendicular to the partition, the base includes a bottom plate and a plurality of positioning elements, the plurality of positioning elements respectively extend from a surface of the bottom plate in a direction perpendicular to the bottom plate, the plurality of positioning elements jointly define a first positioning groove and a second positioning groove, wherein the first positioning groove matches the partition, and the second positioning groove matches the protrusion, wherein the partition is arranged in the first positioning groove, the protrusion is arranged in the second positioning groove, and the magnetic sheet is tightly fitted between the plurality of positioning elements using the partition and the protrusion to be connected to the base.

15. The magnetic assembly according to claim 8, characterized in that The magnetic covering portion includes a first soft magnetic sheet and a second soft magnetic sheet, the first soft magnetic sheet and the second soft magnetic sheet are arranged opposite to each other, wherein the magnetic core body of the magnetic core includes an outer annular surface, an inner annular surface, a first side surface and a second side surface, the outer annular surface surrounds the inner annular surface, the first side surface and the second side surface are arranged opposite to each other and are respectively connected between the outer annular surface and the inner annular surface, the first soft magnetic sheet and the second soft magnetic sheet of the magnetic covering portion respectively cover the first side surface and the second side surface, wherein the first winding and the second winding are respectively located between the first soft magnetic sheet and the second soft magnetic sheet, wherein the magnetic component further includes a fixing portion, the fixing portion surrounds the outer side of the first soft magnetic sheet and the outer side of the second soft magnetic sheet, so as to fix the first soft magnetic sheet and the second soft magnetic sheet to each other on the magnetic core body of the magnetic core.

16. The magnetic assembly according to claim 15, characterized in that The magnetic covering portion also includes a third soft magnetic sheet connected between one end of the first soft magnetic sheet and one end of the second soft magnetic sheet, wherein the fixing portion surrounds the outer side of the first soft magnetic sheet, the outer side of the third soft magnetic sheet and the outer side of the second soft magnetic sheet to fix the first soft magnetic sheet, the third soft magnetic sheet and the second soft magnetic sheet to each other on the magnetic core body of the magnetic core.

17. The magnetic assembly according to claim 8, characterized in that The magnetic covering portion includes a first soft magnetic sheet and a second soft magnetic sheet, the first soft magnetic sheet and the second soft magnetic sheet are arranged opposite to each other, wherein the magnetic core body of the magnetic core includes an outer annular surface, an inner annular surface, a first side surface and a second side surface, the outer annular surface surrounds the inner annular surface, the first side surface and the second side surface are arranged opposite to each other and are respectively connected between the outer annular surface and the inner annular surface, the first soft magnetic sheet and the second soft magnetic sheet of the magnetic covering portion respectively cover the two sides of the outer annular surface, wherein the first winding is located between the second winding and the first soft magnetic sheet, and the second winding is located between the first winding and the second soft magnetic sheet, wherein the magnetic component also includes a fixing portion, surrounding the outer side of the first soft magnetic sheet and the outer side of the second soft magnetic sheet, so as to fix the first soft magnetic sheet and the second soft magnetic sheet to each other on the magnetic core body of the magnetic core.

18. The magnetic assembly according to claim 17, wherein: The magnetic covering portion further includes a third soft magnetic sheet connected between one end of the first soft magnetic sheet and one end of the second soft magnetic sheet, wherein the third soft magnetic sheet is an arc-shaped structure.

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