Integrated magnetic components

Abstract

The present invention discloses an integrated magnetic component, comprising: a container, a current sensor, and a transformer; the current sensor is mounted on the container; the transformer is mounted on the container, the transformer comprising an iron core, a first winding, and a second winding; the first winding comprises a plurality of leads, some of which pass through the current sensor to shunt and sample the current flowing through the first winding; the current value of the lead is collected by the current sensor, and the total current value of the first winding of the transformer is obtained according to the shunt ratio.

Description

[0001] This application is a divisional application of the invention patent application with application number 201910984697.3 filed on October 16, 2019, and invention name “Integrated Magnetic Component”. Technical Field

[0002] The present invention relates to a magnetic component, and more particularly to an integrated magnetic component that integrates a current sensor and a transformer into one. Background Art

[0003] The increasing demand for convenience and versatility in electronic devices has led to a demand for miniaturization and cost-effectiveness of passive components, particularly magnetic components. This has led to the widespread development of integrated and consolidation magnetic components. Studies of existing integrated magnetic components have revealed that their windings are typically simple, and the current sampling magnetic element, or current sensor, is typically large. These drawbacks of bulk and weight become increasingly pronounced as converter power increases. Therefore, there is an urgent need to develop an integrated magnetic component that overcomes these drawbacks. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an integrated magnetic component, which includes:

[0005] a receiving member;

[0006] a current sensor, mounted on the receiving member;

[0007] A transformer is mounted on the accommodating member, the transformer comprising an iron core, a first winding, and a second winding, the first winding comprising a plurality of leads, some of the plurality of leads passing through the current sensor to shunt and sample the current flowing through the first winding, the current values ​​of the leads being collected by the current sensor, and the total current value of the first winding of the transformer being obtained based on a shunt ratio (a controllable current ratio is obtained by presetting the winding structure of the transformer, the same below, and no further details are given).

[0008] In the above-mentioned integrated magnetic component, the first winding includes a plurality of sub-windings connected in parallel, and each of the sub-windings includes at least one lead wire.

[0009] In the above-mentioned integrated magnetic component, the first winding includes at least one sub-winding, and one sub-winding includes a plurality of the leads.

[0010] In the integrated magnetic component, the current sensor includes a first core and a winding, the winding is wound around the first core, the first core has a central hole, and a portion of the lead wire of the first winding passes through the central hole.

[0011] In the above-mentioned integrated magnetic component, the receiving member includes a mounting slot, and the current sensor is disposed in the mounting slot.

[0012] The above-mentioned integrated magnetic component, wherein the accommodating part further includes two first terminals, the mounting slot has a through hole, the through hole is located opposite to the center hole, the two ends of the winding are electrically connected to the two first terminals respectively, and the lead of part of the first winding passes through the through hole and the center hole.

[0013] In the above-mentioned integrated magnetic component, the accommodation component further includes a sidewall retaining wall, and the sidewall retaining wall is located between the current sensor and the transformer and is fixedly connected to the transformer.

[0014] In the above-mentioned integrated magnetic component, the receiving component further includes a mounting hole, and the lead passing through the central hole is fixed in the mounting hole.

[0015] In the above-mentioned integrated magnetic component, the transformer further includes a winding frame, and a second fixed terminal is provided on the winding frame. The second fixed terminal connects and fixes the transformer and the accommodating component.

[0016] In the above-mentioned integrated magnetic component, the accommodating component includes a base, the current sensor and the transformer are disposed on the base, and the current sensor and the transformer are integrated into one body through the base.

[0017] The above-mentioned integrated magnetic component further includes a cover installed on the base, the cover including a protective wall, a middle part, a through hole, at least two first terminals and a first fixed terminal, the protective wall surrounds the middle part and the through hole, the at least two first terminals are arranged on the outside of the protective wall, the current sensor is placed in the cover, the center hole of the current sensor is located at the through hole, the two ends of the winding are electrically connected to the two first terminals respectively, the lead of part of the first winding passes through the through hole and the center hole and is fixed to the base, and the first fixed terminal is installed on the base to fix the cover to the base.

[0018] The above-mentioned integrated magnetic component, wherein the first winding includes N sub-windings connected in series or in parallel, and the second winding includes N+1 sub-windings connected in series or in parallel, N is a positive integer greater than or equal to 2, and the N sub-windings of the first winding and the N+1 sub-windings of the second winding are alternately arranged.

[0019] The above-mentioned integrated magnetic component, wherein the number of winding layers of the transformer is 2N+1 layers, wherein the even-numbered layers are sub-windings corresponding to the first winding, the odd-numbered layers are sub-windings corresponding to the second winding, and the sub-windings corresponding to the first winding are formed by winding multiple wires in parallel.

[0020] In the above-mentioned integrated magnetic component, the sub-winding is a copper wire winding, a copper sheet winding or a copper foil winding.

[0021] The present invention further provides an integrated magnetic component, comprising:

[0022] base;

[0023] a current sensor, mounted on the base;

[0024] A transformer is disposed on the base, and the current sensor and the transformer are integrated into one body through the base. The transformer includes an iron core, a first winding, and a second winding. The first winding includes at least one lead, wherein a partial cross-section of one of the leads of the first winding passes through the current sensor. The current sensor collects the current value of the partial cross-section of the lead to obtain the total current value of the first winding of the transformer.

[0025] In the integrated magnetic component, the lead comprises two bifurcated leads, one of which passes through the first magnetic core of the current sensor and has a cross-sectional area B, where B = l2 × t2, where l2 is the width of the bifurcated lead and t2 is the thickness of the bifurcated lead; the other of which has a cross-sectional area C, where C = l3 × t3, where l3 is the width of the bifurcated lead and t3 is the thickness of the bifurcated lead; and the cross-sectional area of ​​the lead is D, where D = B + C.

[0026] The two bifurcated leads are directly fixed on the base, and the spatial position relationship between the two bifurcated leads and the current sensor is fixed.

[0027] The present invention further provides an integrated magnetic component, comprising:

[0028] a receiving member;

[0029] a current sensor, mounted on the receiving member;

[0030] A transformer is provided on the accommodating member, and the current sensor and the transformer are integrated into one body through the accommodating member. The transformer includes an iron core, a first winding and a second winding.

[0031] The winding method of the transformer winding satisfies the following conditions (1) or (2):

[0032] (1) The first winding includes N sub-windings connected in parallel or in series, and the second winding includes N+1 sub-windings connected in parallel or in series, where N is a positive integer greater than or equal to 2, and the N sub-windings of the first winding and the N+1 sub-windings of the second winding are interlaced;

[0033] (2) The first winding includes N+1 sub-windings connected in parallel or in series, and the second winding includes N sub-windings connected in parallel or in series, where N is a positive integer greater than or equal to 2, and the N+1 sub-windings of the first winding and the N sub-windings of the second winding are interlaced;

[0034] Each sub-winding of the first winding includes a plurality of leads wound in parallel, one of the plurality of leads wound in parallel passes through the current sensor, and the current value of the one lead passing through the current sensor is collected by the current sensor to obtain the total current value of the first winding of the transformer.

[0035] In the above-mentioned integrated magnetic component, the first winding and the second winding are both copper wire windings.

[0036] In the above-mentioned integrated magnetic component, the current sensor includes a first core and a winding, the winding is wound on the first core, the first core has a central hole, and one lead of the first winding passes through the central hole.

[0037] In the above-mentioned integrated magnetic component, the receiving component includes a mounting slot, and the current sensor is disposed in the mounting slot.

[0038] In the above-mentioned integrated magnetic component, the first winding includes a plurality of sub-windings connected in parallel, and each of the sub-windings includes at least one lead.

[0039] In the above-mentioned integrated magnetic component, the first winding includes at least one sub-winding, and one sub-winding includes a plurality of leads.

[0040] The above-mentioned integrated magnetic component, wherein the current sensor includes a first iron core, a winding frame and a winding wire, the first iron core is connected to the winding frame, the winding frame is mounted on the base, the winding wire is wound on the winding frame and electrically connected to the first terminal of the winding frame, and there is a center hole between the winding frame and the first iron core, and a partial cross-section of any of the lead wires passes through the center hole.

[0041] In the above-mentioned integrated magnetic component, a third fixed terminal is provided at the bottom of the winding frame, and the third fixed terminal is connected to the base.

[0042] In the above-mentioned integrated magnetic component, the sub-winding is a copper sheet winding or a copper foil winding.

[0043] The present invention is aimed at the existing technology and its effectiveness lies in: improving the power density of the integrated magnetic component based on the small size of the magnetic part, and being able to shunt the sampling current. At the same time, it can better meet the high-power design requirements when multiple primary windings are connected in parallel, and the lead of any winding passes through the current sensor to sample the current, which significantly reduces the volume of the current sensor to achieve the high power density requirement, thereby improving the applicability of the integrated magnetic component and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1a is a circuit diagram of a first embodiment of an integrated magnetic component of the present invention;

[0045] Figure 1b is a magnetic field and current distribution ratio analysis diagram of the first embodiment of the integrated magnetic component of the present invention;

[0046] Figure 2 is a schematic structural diagram of a first embodiment of an integrated magnetic component of the present invention;

[0047] Figure 3 for Figure 2 Schematic diagram of the transformer structure;

[0048] Figure 4 for Figure 2 Schematic diagram of the structure of the current sensor;

[0049] Figure 5 for Figure 2 A schematic structural diagram of the middle container;

[0050] Figure 6 for Figure 2 A schematic diagram of the structure of the integrated magnetic component from another perspective;

[0051] Figure 7 is a schematic structural diagram of a second embodiment of an integrated magnetic component of the present invention;

[0052] Figure 8 for Figure 7 Schematic diagram of the transformer structure;

[0053] Figure 9 for Figure 7 Schematic diagram of the structure of the current sensor and the cover assembly;

[0054] Figure 10 is a schematic structural diagram of a third embodiment of an integrated magnetic component of the present invention;

[0055] Figure 11 for Figure 10A-A' cross-section winding arrangement diagram (cross-section diagram);

[0056] Figure 12 for Figure 10 Section A-A' shows another winding arrangement diagram;

[0057] Figure 13 is a circuit diagram of a fourth embodiment of an integrated magnetic component of the present invention;

[0058] Figure 14 is a schematic structural diagram of a fourth embodiment of an integrated magnetic component of the present invention;

[0059] Figure 15 for Figure 14 Schematic diagram of the transformer structure;

[0060] Figure 16 for Figure 14 Schematic diagram of the structure of the current sensor. DETAILED DESCRIPTION

[0061] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: This embodiment is implemented on the premise of the technical solution of the present invention, and an implementation method and operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0062] Please refer to Figure 1a-Figure 6 , Figure 1a is a circuit diagram of a first embodiment of an integrated magnetic component of the present invention; Figure 1b is a magnetic field and current distribution ratio analysis diagram of the first embodiment of the integrated magnetic component of the present invention; Figure 2 is a schematic structural diagram of a first embodiment of an integrated magnetic component of the present invention; Figure 3 for Figure 2 Schematic diagram of the transformer structure; Figure 4 for Figure 2 Schematic diagram of the structure of the current sensor; Figure 5 for Figure 2 A schematic structural diagram of the middle container; Figure 6 for Figure 2 Schematic diagram of the structure of the integrated magnetic component from another perspective.

[0063] like Figure 2-Figure 6 As shown, the integrated magnetic component of the present invention includes: a container 11, a current sensor 12 and a transformer 13; the current sensor 12 is installed in the container 11; the transformer 13 is installed on the container 11, and the transformer 13 includes an iron core T, a first winding 131 and a second winding 132. Among them, the first winding includes multiple leads Y11, and the current flowing through the first winding is the sum of the currents flowing through the multiple leads Y11. Figure 1a-Figure 6The first winding 131 includes multiple sub-windings 1311 connected in parallel, and the second winding 132 includes multiple sub-windings 1321 connected in parallel. Each sub-winding 1311 includes a lead Y11. The current sensor 12 is disposed on one or a portion of the multiple leads Y11 (lead A, B, or C). In this embodiment, the current flowing through a portion of the lead Y11 (e.g., lead A) is detected as an example.

[0064] In this embodiment, the first winding 131 is used as the primary winding and the second winding 132 is used as the secondary winding. By setting the winding layout of the transformer, that is, setting the arrangement of the primary and secondary windings, as shown in FIG. Figure 1b As shown, along the axial direction, the sub-windings are arranged as follows: S1 (secondary) - P1 (primary) - S2 - P2 - S3 - P3 - S4. According to magnetic field theory, it can be ensured that the three primary sub-windings can be forced to share the current when connected in parallel. The following formulas (1)-(5) are the corresponding Figure 1b Detailed analysis conducted:

[0065]

[0066] H0(x,y,NI,a)=0

[0067]

[0068] H7(x,y,NI,a)=0

[0069]

[0070] Where NI represents the total magnetic potential of the primary or secondary winding, x represents the magnetic potential of the secondary winding in the first and seventh winding slots, y represents the magnetic potential of the primary winding in the second and sixth winding slots, I p (y,NI) is the magnetic field intensity at each point in the original edge slot, I S (x, NI) is the magnetic field intensity at each point in the secondary winding slot; a represents the winding slot width (i.e., the distance from the center leg to the side leg of the transformer core); H0(x, y, NI, a) to H7(x, y, NI, a) are the magnetic field intensities in each winding slot and non-winding slot; HH(x, y, NI, a) represents the magnetic field intensity at each point from S1 (or S4) to S4 (or S1); f(x, y, NI, a) is the sum of the squares of the magnetic field intensities in each slot, where f(x, y, NI, a) ∝ HH(x, y, NI, a) 2 Represents the equivalent coefficient related to the transformer magnetic field energy.

[0071] From Equation (5), based on the principle of minimum energy in steady-state conditions, we know that the point where the primary partial derivative is equal to zero is the extreme point of the function, and the point where the secondary partial derivative is greater than zero is the minimum point. This shows that the current distribution ratio of the three primary winding sub-windings is 1:1:1, and the current distribution ratio of the four secondary winding sub-windings is 1:2:2:1.

[0072] Therefore, the current flowing through the portion of lead wire Y11 and the total current flowing through the first winding 131 have a fixed split ratio, such as the aforementioned 1 / 3. Therefore, by collecting the current value of this portion of lead wire through the current sensor 12, the total current value of the first winding 131 of the transformer 13 can be obtained based on this split ratio. In this embodiment, the first winding 131 is used as the primary winding and the second winding 132 is used as the secondary winding. However, the present invention is not limited to this embodiment. In other embodiments, the first winding 131 can also be the secondary winding, and the second winding 132 can also be the primary winding.

[0073] Furthermore, the current sensor 12 includes a first core 121 and a winding 122 . The winding 122 is wound around the first core 121 . The first core 121 has a central hole K1 , and a portion of the lead wire Y11 of the first winding 131 passes through the central hole K1 .

[0074] Figure 3 As shown, the transformer 13 includes two cores T, a first winding 131, and a second winding 132. The first winding 131 includes multiple sub-windings 1311 connected in parallel, and the second winding 132 includes multiple sub-windings 1321 connected in parallel. Multiple sub-windings 1311 are wound around a frame 133, and each sub-winding 1311 includes a lead wire Y11. In this embodiment, the lead wire Y11 of each sub-winding 1311 passes through the center hole K1. However, the present invention is not limited to this. In other embodiments, the first winding may further include at least one sub-winding, each sub-winding including multiple leads Y11, with one end of some of the multiple leads Y11 passing through the center hole K1. Furthermore, the sub-windings 1311 are copper wire windings, but the present invention is not limited to this.

[0075] It should be noted that, in this embodiment, the first winding 131 is the primary winding and includes three sub-windings 1311, the second winding 132 is the secondary winding and includes four sub-windings 1321, and the three sub-windings 1311 and the four sub-windings 1321 are arranged alternately to form a "secondary-primary-secondary-primary-secondary-primary-secondary" structure, but the present invention is not limited to this. In other embodiments, the first winding is the secondary winding and the second winding is the primary winding. Taking the first winding including three sub-windings and the second winding including four sub-windings as an example, the three sub-windings of the first winding and the four sub-windings of the second winding are arranged alternately to form a "primary-secondary-primary-secondary-primary-secondary-primary" structure. In another embodiment, the first winding may include only two sub-windings 1311, and the second winding may include only three sub-windings 1321. The two sub-windings 1311 and the three sub-windings 1321 are staggered to form a "secondary-primary-secondary-primary-secondary" or "primary-secondary-primary-secondary-primary" structure. By adopting this staggered arrangement of windings, the distribution characteristics of the H field can be utilized to achieve automatic current equalization or current diversion according to a fixed ratio between the sub-windings 1311. The present invention does not limit the number of sub-windings, as long as the sub-windings at both ends are of the same type, that is, sub-windings on the same primary side or sub-windings on the same secondary side. For example, more complex structures such as "primary-secondary-primary-...primary" or "secondary-primary-secondary-...secondary" can be formed, which will not be described in detail.

[0076] It is worth noting that the present invention does not limit the winding method of the winding. The designer can select the corresponding winding method according to the actual situation, as long as the above structure is formed.

[0077] Furthermore, the accommodating member 11 includes a mounting slot 111 and two first terminals 112. The mounting slot has a through hole K2. The current sensor 12 is disposed in the mounting slot 111. The through hole K2 is aligned with the center hole K1. The two ends of the winding 122 are electrically connected to the two first terminals 112 respectively. Part of the lead Y11 of the first winding 131 passes through the through hole K2 and the center hole K1.

[0078] Furthermore, the accommodating member 11 further includes a side retaining wall 113, a first mounting hole K3, and a second mounting hole K4. The side retaining wall 113 is located between the current sensor 12 and the transformer 13 and is fixedly connected to the transformer 13. The lead Y11 passing through the center hole K1 is fixed in the first mounting hole K3, and the remaining leads can be fixed in the second mounting hole K4.

[0079] The two ends of the winding wire 122 are respectively hooked onto the two first terminals 112 and connected to the PCB board 14. Meanwhile, the first lead wire Y11 passes through the center hole K1, allowing the current sensor 12 to sample the current flowing through the lead wire Y11. The current sensor 12 is then fixed within the first mounting hole K3. The other leads are fixed within the second mounting hole K4 and connected to the PCB board 14. Meanwhile, the transformer 13 is also disposed on a side of the container 11. In this embodiment, the container 11 also has a bottom retaining wall 114. By aligning the iron core T of the transformer 13 with the side retaining wall 113 and the bottom retaining wall 114, the transformer and current sensor form an integrated magnetic component that can be plugged into the PCB board 14 to achieve electrical connection with the PCB board 14.

[0080] In addition, the lead wire Y11 passing through the central hole K1 of the current sensor 12 for sampling the current may be any lead wire of any winding of the primary winding.

[0081] Therefore, the present invention solves the problem of long-distance flying wires in magnetic components and can reduce the loss caused by long leads; the retaining wall solves the problem of safety distance and saves space for magnetic components; the parallel connection of multiple primary windings can achieve high-power input, and at the same time, the use of shunt ratio sampling can reduce the overall volume of the magnetic component.

[0082] Please refer to Figure 7-Figure 9 , Figure 7 is a structural diagram of a second embodiment of an integrated magnetic component of the present invention; Figure 8 for Figure 7 Schematic diagram of the transformer structure; Figure 9 for Figure 7 Schematic diagram of the structure of the current sensor and cover assembly.

[0083] like Figure 7-Figure 9 As shown, the integrated magnetic component includes: a base 21, a current sensor 22, and a transformer 23. The current sensor 22 is mounted on the base 21; the transformer 23 is also mounted on the base 21. The base 21 integrates the current sensor 22 and the transformer 23 into one body (the magnetic component can be fixed to a PCB 24). The transformer 23 includes an iron core T, a first winding 231, and a second winding 232. The first winding 231 includes at least one lead Y21, wherein one lead Y21 of the first winding 231 passes through the current sensor 22. The current value of the lead Y21 is collected by the current sensor 22 to obtain the total current value of the first winding 231 of the transformer 23. In this embodiment, the first winding 231 is a secondary winding and the second winding 232 is a primary winding. However, the present invention is not limited to this embodiment. In other embodiments, the first winding 231 can also be a primary winding and the second winding 232 can also be a secondary winding. The current distribution ratio of the sampled winding (ie Y21) is as follows: Figure 1bAs shown in Formula 1, no further details are given.

[0084] Furthermore, the current sensor 22 includes a first core 221 and a winding 222 . The winding 222 is wound around the first core 221 . The first core 221 has a central hole K1 . Any lead wire Y21 of the first winding 231 passes through the central hole K1 .

[0085] Furthermore, the transformer 23 includes two iron cores T and multiple sub-windings 2321 of the second winding 232. The first winding 231 includes multiple sub-windings 2311 connected in parallel. Each sub-winding 2311 includes two leads Y21. In this embodiment, one of the two leads Y21 passes through the center hole K1. However, the present invention is not limited to this. In other embodiments, the first winding may include at least one sub-winding, each sub-winding including multiple leads Y21. Furthermore, the sub-windings 2311 are copper sheet windings, but the present invention is not limited to this.

[0086] Furthermore, the integrated magnetic component also includes a cover 25, which is installed on the base 21. The cover 25 includes a protective wall 251, a middle portion 252, a through hole K2 and two first terminals 253. The protective wall 251 surrounds the middle portion 252 and the through hole K2, and the two first terminals 253 are arranged on the outside of the protective wall 251. The current sensor 22 is placed in the cover 25, and the first iron core 221 is sleeved on the middle portion 252. The center hole K1 of the first iron core 221 is aligned with the through hole K2, and the two ends of the winding 222 are electrically connected to the two first terminals 253 (terminal numbers 253 and 254 are the two ends of the same L-shaped terminal, the same below, and no further details are given). Any lead Y21 is fixed to the base 21 after passing through the through hole K2 and the center hole K1.

[0087] Furthermore, a first fixing terminal 254 is further disposed on the bottom of the cover 25 . The first fixing terminal 254 is mounted on the base 21 to fix the cover 25 on the base 21 .

[0088] The current sensor 22 is aligned with the through hole K2 through its center hole K1, and the current sensor 22 is placed on the middle part 252. The two ends of the winding 222 are respectively hung on the two first terminals 253. The first lead Y21 of the secondary copper sheet winding passes through the center hole K1 and is fixed to the base 21. The other copper sheet leads are directly fixed to the base 21.

[0089] Therefore, the present invention fixes the secondary copper sheet and the first terminal of the transformer on the base, so that the transformer and the current sensor become an integrated magnetic component and are then inserted into the PCB board to achieve electrical connection with the PCB board.

[0090] Please refer to Figure 10 , Figure 10FIG. 4 is a schematic structural diagram of a third embodiment of an integrated magnetic component according to the present invention. Figure 10 The circuit schematic and structure diagram of the integrated magnetic component shown are similar to Figure 1a , Figure 2 The same is true, and no further details are given here. In this embodiment, Figure 10 The winding arrangement is as follows Figure 2 Besides being arranged along the axial direction of the core as shown, they can also be arranged along the radial direction. In addition, a second fixing terminal 1331 is provided on the winding frame 133 , and the second fixing terminal 1331 connects and fixes the transformer 13 and the accommodating member 11 .

[0091] Figure 11 and Figure 12 They are respectively Figure 10 The winding arrangement diagram of the integrated magnetic component along the A-A' section in different embodiments. Figure 11 middle, Figure 10 The structure of the integrated magnetic components can be seen in Figures 1-6. The transformer windings are arranged as follows: from bottom to top, the second and fourth layers are sub-windings of the primary winding, and the first, third, and fifth layers are sub-windings of the secondary winding, or the second and fourth layers are sub-windings of the secondary winding, and the first, third, and fifth layers are sub-windings of the primary winding. The second layer's sub-windings consist of three parallel wires, and the fourth layer's sub-windings also consist of three parallel wires. The sub-windings of the second and fourth layers can be connected in parallel or in series. Because the magnetic field in this winding arrangement passes horizontally from side to side (not shown), the three parallel sub-windings in the second and fourth layers experience the same magnetic field, automatically achieving current sharing among the three parallel windings. Furthermore, the windings of the first, third, and fifth layers can be connected in series or in parallel, with the current distribution in the parallel case being 1:2:1.

[0092] like Figure 12 As shown, Figure 10 The structure of the integrated magnetic component can be referred to Figure 1-6, and the winding distribution of the integrated magnetic component is: from the bottom to the top, the second, fourth, and sixth layers are the sub-windings of the primary winding, and the first, third, fifth, and seventh layers are the sub-windings of the secondary winding, or vice versa. Figure 1b The analysis is the same as , so when the windings of the second, fourth and sixth layers are connected in parallel, the current distribution ratio is 1:1:1, and the current distribution ratio of the sub-windings of the first, third, fifth and seventh layers is 1:2:2:1.

[0093] The number of sub-windings corresponding to the primary and secondary windings is not limited thereto. The first winding may include N sub-windings connected in series or in parallel, and the second winding may include N+1 sub-windings connected in series or in parallel, where N is a positive integer greater than or equal to 2. The N sub-windings of the first winding and the N+1 sub-windings of the second winding are interleaved. Furthermore, the transformer has 2N+1 winding layers, where even-numbered layers correspond to the sub-windings of the first winding and odd-numbered layers correspond to the sub-windings of the second winding. Optionally, the sub-windings corresponding to the first winding are formed by winding multiple wires in parallel.

[0094] By adopting the above winding method, current equalization can be automatically achieved between the windings of the transformer without the need for additional control circuits or methods, and the circuit of the integrated magnetic component is simple.

[0095] Please refer to Figure 13-16 , Figure 13 is a schematic diagram of a fourth embodiment of an integrated magnetic component according to the present invention; Figure 14 is a schematic structural diagram of a fourth embodiment of an integrated magnetic component of the present invention; Figure 15 for Figure 14 Schematic diagram of the transformer structure; Figure 16 for Figure 14 Schematic diagram of the structure of the current sensor.

[0096] like Figure 14-16 As shown, in this embodiment, the transformer 33 also includes an iron core T, multiple primary windings (i.e., second windings) 332 and a winding bobbin 333. The first winding 331 is a secondary winding and is a copper foil winding. The first winding 331 includes two first leads Y31 and one second lead Y32. The current sensor 32 includes a first iron core 321, a winding 322 and a winding bobbin 323. The first iron core 321 is connected to the winding bobbin 323. The winding bobbin 323 is mounted on the base 31. The winding 322 is wound around the winding bobbin 323 and connected to the first terminal 3231 of the winding bobbin 323. A center hole K1 is defined between the winding bobbin 323 and the first iron core 321. Any lead, such as a partial cross-section of the first lead Y31, passes through the center hole K1.

[0097] Furthermore, a third fixed terminal 3232 is provided at the bottom of the winding skeleton 323 (terminals 3231 and 3232 are two ends of the same L-shaped terminal, the same below, and no further description is given), and the third fixed terminal 3232 is connected to the base 31.

[0098] In this embodiment, the secondary side has only one sub-winding, consisting of two first leads Y31 and one second lead Y32. A portion of one first lead Y31 passes through the current sensor 32 to sample current, while the remaining leads are directly fixed to the base. The cross-sectional area of ​​the first lead Y31 passing through the current sensor 32 is B, calculated using the formula B = l2 × t2, where l2 is the width of the first lead Y31 and t2 is its thickness. The cross-sectional area of ​​the other first lead 31 is C, calculated using the formula C = l3 × t3, where l3 is the width of the first lead Y31 and t3 is its thickness. It is worth noting that in this embodiment, the two first leads Y31 are bifurcated leads of the transformer's output leads Y. The cross-sectional area D of the output leads Y is calculated using the formula D = B + C.

[0099] The winding wire 322 is wound on the winding frame 323 and hung on the first terminal 3231 of the winding frame 323. Its third fixed terminal 3232 directly positions the current sensor 32 on the base 31, so that the transformer and the current sensor 32 become an integrated magnetic component, which can be plugged into the PCB board 34 to achieve electrical connection with the PCB board 34.

[0100] In summary, the present invention is based on the requirement of reducing the volume of magnetic components, that is, improving the power density of integrated magnetic components, and being able to shunt the sampling current. At the same time, when multiple primary windings are connected in parallel, it can better meet the high-power design requirements, and any lead of any winding passes through the current sensor to sample the current (by pre-setting the winding structure to ensure automatic current sharing or fixed ratio of the current), which greatly reduces the volume of the current sensor to achieve the high power density requirement, thereby improving the applicability of the integrated magnetic components.

[0101] Although the present invention has been disclosed above with reference to the above embodiments, they are not intended to limit the present invention. Persons skilled in the art in the art to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of protection defined in the appended claims.

Claims

1. An integrated magnetic component, characterized in that: include: a receiving member; a current sensor, mounted on the receiving member; A transformer is provided on the accommodating member, and the current sensor and the transformer are integrated into one body through the accommodating member. The transformer includes an iron core, a first winding and a second winding. The winding method of the transformer winding satisfies the following conditions (1) or (2): (1) The first winding includes N sub-windings connected in parallel or in series, and the second winding includes N+1 sub-windings connected in parallel or in series, where N is a positive integer greater than or equal to 2, and the N sub-windings of the first winding and the N+1 sub-windings of the second winding are interlaced; (2) The first winding includes N+1 sub-windings connected in parallel or in series, and the second winding includes N sub-windings connected in parallel or in series, where N is a positive integer greater than or equal to 2, and the N+1 sub-windings of the first winding and the N sub-windings of the second winding are interlaced; Each sub-winding of the first winding includes a plurality of leads wound in parallel, one of the plurality of leads wound in parallel passes through the current sensor, and the current value of the one lead passing through the current sensor is collected by the current sensor to obtain the total current value of the first winding of the transformer.

2. The integrated magnetic component according to claim 1, wherein: The first winding and the second winding are both copper wire windings.

3. The integrated magnetic component according to claim 1, wherein: The current sensor includes a first iron core and a winding. The winding is wound on the first iron core. The first iron core has a central hole. One lead wire of the first winding passes through the central hole.

4. The integrated magnetic component according to claim 1, wherein: The accommodating component includes a mounting groove, and the current sensor is disposed in the mounting groove.

5. The integrated magnetic component according to claim 1, wherein: The first winding is a primary winding or a secondary winding.

6. The integrated magnetic component according to claim 1, wherein: The first winding includes a plurality of sub-windings connected in parallel, and each of the sub-windings includes at least one lead wire.

7. The integrated magnetic component according to claim 1, wherein: The first winding includes at least one sub-winding, and one sub-winding includes a plurality of leads.

8. The integrated magnetic component according to claim 1, wherein: The accommodating member includes a base, the current sensor and the transformer are disposed on the base, and the current sensor and the transformer are integrated into one body through the base. The current sensor includes a first iron core, a winding bobbin, and a winding wire. The first iron core is connected to the winding bobbin, and the winding bobbin is mounted on the base. The winding wire is wound around the winding bobbin and electrically connected to a first terminal of the winding bobbin. A central hole is defined between the winding bobbin and the first iron core, and a partial cross-section of any of the leads passes through the central hole.

9. The integrated magnetic component according to claim 8, wherein: A third fixed terminal is provided at the bottom of the winding frame, and the third fixed terminal is connected to the base.

10. The integrated magnetic component according to claim 1, wherein: The first winding is a copper sheet winding or a copper foil winding.

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