Magnetic integrated transformer

Abstract

The utility model provides a magnetic integrated transformer which comprises a first magnetic core assembly, a second magnetic core assembly, a leakage inductance magnetic core assembly and a glue pouring opening. The first magnetic core assembly comprises a first magnetic plate, a first side column, a second side column and a first middle column; the first framework wound with the first winding is arranged on the first middle column in a sleeving mode. The second magnetic core assembly comprises a second magnetic plate, a third side column, a fourth side column and a second middle column; the second framework wound with the second winding is arranged on the second middle column in a sleeving mode. The first magnetic core assembly and the second magnetic core assembly are oppositely arranged, and the first magnetic plate and the second magnetic plate are located at the two ends. The leakage inductance magnetic core assembly comprises a first leakage inductance magnetic sheet and a second leakage inductance magnetic sheet, gaps exist between the two ends of the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet, and the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet are arranged at the adjacent position of the first framework and the second framework and correspond to the gaps between the two ends of the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet. And the glue filling port is arranged at the adjacent part of the first framework and the second framework. Therefore, the integration level is improved, the loss is reduced, and the heat dissipation effect is improved.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a magnetic integrated transformer. Background Art

[0002] With the rapid development of new energy technologies, the proportion of new energy vehicles is increasing.

[0003] New energy vehicles have power batteries as power sources, and the input end of the on-board charger (OBC) needs to be directly connected to the power grid to charge the power battery through power conversion. With the explosive growth of new energy vehicles, the demand for on-board chargers has also increased significantly. In order to implement the concept of green energy development and help achieve the low-carbon goals of "carbon neutrality" and "carbon peak", the on-board charger, as an energy conversion device between the battery and the power grid of new energy vehicles, is gradually developing towards low carbon footprint, high conversion efficiency, and high power density. Automobile terminals are gradually moving towards integration and integration.

[0004] In order to pursue high-efficiency and high-power-density on-board chargers, passive components are used as core components in on-board chargers. The volume of passive components such as the main transformer and inductor occupies more than 1 / 3 of the volume of the entire charger. By increasing the frequency, the volume of magnetic components can be reduced and the power density of the on-board charger can be improved. However, this also brings about many thermal problems and electromagnetic compatibility (EMC) problems of magnetic components.

[0005] The main transformer and resonant inductor are the main power devices of the resonant circuit (such as LC resonant circuit or LLC resonant circuit), and their volume, loss and efficiency are the top priorities in the resonant circuit. In order to pursue high power density and reduce the cost and volume of magnetic parts, the main transformer and resonant inductor are often combined together through magnetic integration. There are currently two commonly used integration methods: Scheme 1, the main transformer and the resonant inductor share part of the magnetic core; Scheme 2, the resonant inductor is magnetically integrated in the main transformer through leakage inductance. Scheme 1 has been widely used, but its optimized volume is small, and the winding and process difficulties increase after the combination, and the overall cost reduction is not obvious. Scheme 2 uses leakage inductance for magnetic integration, which directly reduces one resonant inductor in terms of volume and cost, and has huge advantages. However, for the main transformer, a significant increase in leakage inductance will lead to the following problems.

[0006] First, the primary and secondary windings are affected by the proximity effect and skin effect under the leakage magnetic field, and their Rs (AC resistance) at high frequencies will increase significantly, causing an increase in winding losses, which in turn affects heat and efficiency.

[0007] Second, high-power-density magnetic parts are usually placed in an aluminum shell for glue filling and heat dissipation. After the main transformer with integrated leakage inductance is placed in the shell, the leakage magnetic flux will pass through the shell, causing eddy current loss on the shell (such as the actual measured Rs will increase). This situation is equivalent to connecting a rated load in parallel to the original transformer, which increases the power current of the original and secondary sides, affecting efficiency and heat.

[0008] Third, based on the second point, the shell will generate a reverse magnetic flux to offset the leakage magnetic field, causing the designed leakage inductance (resonant inductance) to become smaller in the shell, affecting the resonant cavity;

[0009] Fourth, to solve the second and third problems, some well-wrapped core structures are often used for shielding. This design usually causes the core center column to be completely surrounded by the winding and the frame, resulting in a longer heat dissipation path, and the potting glue is difficult to penetrate into the core center column, causing heat problems in the core center column. Utility Model Content

[0010] The utility model provides a magnetic integrated transformer, which reduces the loss of the transformer and improves the heat dissipation effect of magnetic parts on the basis of improving the integration degree.

[0011] In order to achieve the above object, the utility model provides a magnetic integrated transformer, comprising:

[0012] A first magnetic core component, the first magnetic core component comprises a first magnetic plate, a first side column, a second side column and a first middle column are arranged on the first magnetic plate, and the first middle column is located between the first side column and the second side column; a first frame is sleeved on the first middle column, and a first winding is wound on the first frame;

[0013] A second magnetic core component, the second magnetic core component comprises a second magnetic plate, a third side column, a fourth side column and a second middle column are arranged on the second magnetic plate, and the second middle column is located between the third side column and the fourth side column; a second frame is sleeved on the second middle column, and a second winding is wound on the second frame; the first magnetic core component and the second magnetic core component are arranged opposite to each other, and the first magnetic plate and the second magnetic plate are located at both ends;

[0014] A leakage inductance magnetic core assembly, wherein the leakage inductance magnetic core assembly comprises a first leakage inductance magnetic sheet and a second leakage inductance magnetic sheet, and there is a gap between both ends of the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet; the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet are arranged adjacent to the first frame and the second frame;

[0015] The glue filling port is arranged adjacent to the first frame and the second frame, and corresponds to the gap between the two ends of the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet.

[0016] Preferably, a first leakage magnetic sheet accommodating groove and a second leakage magnetic sheet accommodating groove are provided on the first skeleton and / or the second skeleton adjacent to the first skeleton, the first leakage inductance magnetic sheet is placed in the first leakage magnetic sheet accommodating groove, and the second leakage inductance magnetic sheet is placed in the second leakage magnetic sheet accommodating groove.

[0017] Preferably, the first leakage inductance magnetic sheet comprises a first leakage inductance sub-magnetic sheet and a second leakage inductance sub-magnetic sheet;

[0018] The second leakage inductor magnetic sheet includes a third leakage inductor sub-magnetic sheet and a fourth leakage inductor sub-magnetic sheet.

[0019] Preferably, the first magnetic leakage sheet accommodating groove is arranged on a side of the first frame or the second frame close to a side column, the first magnetic leakage sheet accommodating groove is an arc annular groove and is open on one side away from the first frame or the second frame, and when the first frame and the second frame are assembled, the opening is covered by the corresponding surface of the second frame or the first frame;

[0020] The second magnetic leakage sheet accommodating groove is arranged on a side of the first frame or the second frame close to the other side column. The second magnetic leakage sheet accommodating groove is an arc ring groove and is open on one side away from the first frame or the second frame. When the first frame and the second frame are assembled, the opening is covered by the corresponding surface on the second frame or the first frame.

[0021] Preferably, both ends of the first arc-shaped leakage magnetic sheet accommodating groove and the second arc-shaped leakage magnetic sheet accommodating groove include end faces, and the end faces at both ends are aligned with a gap, and the relative end faces with the gap are connected near the first skeleton or the second skeleton by an extended connecting surface, and the relative end faces with the gap, the extended connecting surface and the second skeleton or the first skeleton form a glue filling port.

[0022] Preferably, the first center column includes adjacent first sub-center column and second sub-center column, the first magnetic plate includes adjacent first sub-magnetic plate and second sub-magnetic plate, and a heat conductive material is arranged between the first sub-center column and the second sub-center column and the first sub-magnetic plate and the second sub-magnetic plate;

[0023] The second center column includes adjacent third and fourth sub-center columns, the second magnetic plate includes adjacent third and fourth sub-magnetic plates, and heat conductive material is arranged between the third and fourth sub-center columns and the third and fourth sub-magnetic plates.

[0024] Preferably, the first side column and the second side column at least partially surround the first middle column;

[0025] The third side column and the fourth side column at least partially surround the second middle column.

[0026] Preferably, the magnetic integrated transformer further comprises: a housing and a potting compound;

[0027] The potting glue enters from the potting port;

[0028] The potting glue fills the gap in the shell.

[0029] Preferably, the first center column includes adjacent first sub-center columns and second sub-center columns, the first magnetic plate includes adjacent first sub-magnetic plates and second sub-magnetic plates, and the potting glue fills the gap between the first sub-center column and the second sub-center column, and the gap between the first sub-magnetic plates and the second sub-magnetic plates;

[0030] The second center column includes adjacent third sub-center column and fourth sub-center column, the second magnetic plate includes adjacent third sub-magnetic plate and fourth sub-magnetic plate, and the potting glue fills the gap between the third sub-center column and the fourth sub-center column, and the gap between the third sub-magnetic plate and the fourth sub-magnetic plate.

[0031] Preferably, the magnetic integrated transformer further comprises: a three-dimensional cooling water channel;

[0032] The three-dimensional cooling water channel is arranged on the outside of the shell.

[0033] Preferably, the three-dimensional cooling water channel comprises:

[0034] a first water channel disposed outside the first magnetic plate and parallel to the first magnetic plate;

[0035] A second water channel is arranged outside the second magnetic plate and parallel to the second magnetic plate.

[0036] Compared with the prior art, the technical effect that the utility model can achieve is that, on the basis of improving the integration level, the loss of the transformer is reduced and the heat dissipation effect of the magnetic parts is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A schematic structural exploded diagram of an embodiment of a magnetic integrated transformer provided by the utility model is shown.

[0039] Figure 2 The structural explosion diagram of an embodiment of the first skeleton and the second skeleton of the magnetic integrated transformer provided by the utility model and the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet is shown.

[0040] Figure 3 The structural schematic diagrams of two embodiments of the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet of the magnetic integrated transformer provided by the utility model are shown.

[0041] Figure 4A schematic diagram of the first direction cross-sectional structure of the magnetic integrated transformer filled with potting glue provided by the utility model is shown.

[0042] Figure 5 The schematic diagram of the second direction cross-section structure of the magnetic integrated transformer with three-dimensional cooling water channels provided by the utility model and filled with potting glue is shown, and the first direction cross-section and the second direction cross-section are perpendicular to each other.

[0043] Figure 6 The frequency distribution of the AC resistance of the magnetic integrated transformer provided by the utility model and the transformer provided by the prior art is demonstrated. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0045] It should be understood that the terms "first", "second", etc. in the claims, specification and drawings of the present application are used to distinguish different objects rather than to describe a specific order. The terms "include" and "comprise" used in the specification and claims of the present application indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0046] See also Figure 1 As shown, the magnetic integrated transformer provided by the present invention comprises: a first magnetic core component 10 , a second magnetic core component 30 , a leakage inductance magnetic core component 50 , and a glue injection port 70 .

[0047] See also Figure 1 As shown, the first magnetic core component 10 includes a first magnetic plate 11; a first side column 12, a second side column 13 and a first middle column 14 are arranged on the first magnetic plate 11; the first middle column 14 is located between the first side column 12 and the second side column 13. A first frame 20 is sleeved on the first middle column 14, and a first winding 81 is wound on the first frame 20. The first middle column 14 (or also referred to as the first winding 81) is at least partially surrounded by the first side column 12 and the second side column 13.

[0048] See also Figure 1As shown, the second magnetic core component 30 includes a second magnetic plate 31, on which a third side column 32, a fourth side column 33 and a second middle column 34 are arranged; the second middle column 34 is located between the third side column 32 and the fourth side column 33. A second frame 40 is sleeved on the second middle column 34, and a second winding 82 is wound on the second frame 40. The second middle column 34 (or also referred to as the second winding 82) is at least partially surrounded by the third side column 32 and the fourth side column 33.

[0049] See also Figure 1 and Figure 2 As shown, the first skeleton 20 is provided with a first winding groove 25 for winding the first winding 81. The first hollow center hole 26 of the first skeleton 20 accommodates the first center column 14. The second skeleton 40 is provided with a second winding groove 45 for winding the second winding 82. The second hollow center hole 46 of the second skeleton 40 accommodates the second center column 34. The first winding 81 has a first lead wire 83 and a second lead wire 84 at both ends. The second winding 82 has a third lead wire 85 and a fourth lead wire 86 at both ends. The magnetic integrated transformer also includes a base 61 for fixing the components included in the magnetic integrated transformer, such as the lead wires.

[0050] See also Figure 1 As shown, the first magnetic core component 10 and the second magnetic core component 30 are arranged opposite to each other, and the first magnetic plate 11 and the second magnetic plate 31 are located at both ends.

[0051] Combined with reference Figure 2 As shown, the leakage inductance magnetic core assembly 50 includes a first leakage inductance magnetic sheet 51 and a second leakage inductance magnetic sheet 52. There is a gap between both ends of the first leakage inductance magnetic sheet 51 and the second leakage inductance magnetic sheet 52. The first leakage inductance magnetic sheet 51 and the second leakage inductance magnetic sheet 52 are arranged adjacent to the first frame 20 and the second frame 40. The use of arc-shaped leakage inductance magnetic sheets can control the uniform distribution of magnetic resistance from the leakage inductance magnetic sheets to the magnetic cores on both sides, which is conducive to reducing the diffuse magnetic flux.

[0052] Combined with reference Figure 2 and Figure 4 As shown, the glue filling port 70 is disposed adjacent to the first frame 20 and the second frame 40 , corresponding to the gap between the two ends of the first leakage inductance magnetic sheet 51 and the second leakage inductance magnetic sheet 52 .

[0053] See also Figure 3 As shown, an embodiment of a first leakage inductance magnetic sheet 51 and a second leakage inductance magnetic sheet 52 is shown. Figure 3 The left side of FIG. 1 shows an embodiment in which the first leakage inductance magnetic sheet 51 or the second leakage inductance magnetic sheet 52 is a whole piece. Figure 3 The right side of FIG. 1 shows an embodiment in which the first leakage inductance magnetic sheet 51 or the second leakage inductance magnetic sheet 52 is composed of multiple sub-magnetic sheets.

[0054] See also Figure 3As shown, the first leakage inductance magnetic sheet 51 includes a first leakage inductance sub-magnetic sheet 53 and a second leakage inductance sub-magnetic sheet 55. The first leakage inductance sub-magnetic sheet 53 and the second leakage inductance sub-magnetic sheet 55 are in the shape of concentric circular arcs. The first leakage inductance sub-magnetic sheet 53 and the second leakage inductance sub-magnetic sheet 55 can be fixed by limiting the position in the first leakage magnetic sheet accommodating groove 21 or by dispensing glue.

[0055] See also Figure 3 As shown, the second leakage inductance magnetic sheet 52 includes a third leakage inductance sub-magnetic sheet 54 and a fourth leakage inductance sub-magnetic sheet 56. The third leakage inductance sub-magnetic sheet 54 and the fourth leakage inductance sub-magnetic sheet 56 are in the shape of concentric circular arcs. The third leakage inductance sub-magnetic sheet 54 and the fourth leakage inductance sub-magnetic sheet 56 can be fixed by limiting the position in the second leakage magnetic sheet accommodating groove 22 or by dispensing glue.

[0056] Accordingly, by implementing the first leakage inductance magnetic sheet 51 and the second leakage inductance magnetic sheet 52 as being composed of multiple sub-magnetic sheets, the diffuse magnetic flux can be further reduced, the influence of the structure on the AC resistance (Rs) can be reduced, and accurate control of the leakage inductance inside and outside the shell can be ensured.

[0057] See also Figure 1 and Figure 2 As shown, the first frame 20 is adjacent to the second frame 40, and a first leakage magnetic sheet accommodating groove 21 and a second leakage magnetic sheet accommodating groove 22 are provided on the first frame 20. The first leakage inductance magnetic sheet 51 is placed in the first leakage magnetic sheet accommodating groove 21, and the second leakage inductance magnetic sheet 52 is placed in the second leakage magnetic sheet accommodating groove 22. Not shown in the figure, the first leakage magnetic sheet accommodating groove 21 and the second leakage magnetic sheet accommodating groove 22 may also be provided on the second frame 40, or respectively provided on the first frame 20 and the second frame 40.

[0058] See also Figure 1 As shown, the first magnetic core component 10 and the second magnetic core component 30 are arranged relative to each other, specifically, the first side column 12 is aligned with the third side column 32, the second side column 13 is aligned with the fourth side column 33, and the first middle column 14 is aligned with the second middle column 34. At the same time, the first frame 20 and the second frame 40 are also arranged relative to each other.

[0059] The cross-sections of the first side column 12 and the second side column 13 are in the shape of a rectangle truncated by an arc. The arc-shaped surface of the first side column 12 and the arc-shaped surface of the second side column 13 are arranged opposite to each other, and the two arc-shaped surfaces at least partially cover the first winding 81 .

[0060] The cross-sections of the third side column 32 and the fourth side column 33 are rectangular truncated by an arc. The arc-shaped surface of the third side column 32 and the arc-shaped surface of the fourth side column 33 are arranged opposite to each other, and the arc-shaped surfaces at least partially cover the second winding 82 .

[0061] See also Figure 1 and Figure 2As shown, the first leakage magnetic sheet accommodating groove 21 is arranged on the side of the first frame 20 close to the first side column 12, the first leakage magnetic sheet accommodating groove 21 is an arc annular groove and is open on one side away from the first frame 20, and the first leakage inductance magnetic sheet 51 is placed in the first leakage magnetic sheet accommodating groove 21 through the opening. When the first magnetic core assembly 10 with the first frame 20 and the second magnetic core assembly 30 with the second frame 40 are assembled, the opening is covered by the corresponding surface 41 on the second frame 40. Of course, the first leakage magnetic sheet accommodating groove 21 can also be arranged on the second frame 40.

[0062] See also Figure 1 and Figure 2 As shown, the second leakage magnetic sheet accommodating groove 22 is arranged on the side of the first frame 20 close to the second side column 13, the second leakage magnetic sheet accommodating groove 22 is an arc annular groove and is open on one side away from the first frame 20, and the second leakage inductance magnetic sheet 52 is placed in the second leakage magnetic sheet accommodating groove 22 through the opening. When the first magnetic core assembly 10 with the first frame 20 and the second magnetic core assembly 30 with the second frame 40 are assembled, the opening is covered by the corresponding surface 42 on the second frame 40. Of course, the second leakage magnetic sheet accommodating groove 22 can also be arranged on the second frame 40.

[0063] The first leakage inductor magnetic sheet 51 is in the shape of an arc ring that matches the first leakage magnetic sheet accommodating groove 21 .

[0064] The second leakage inductor magnetic sheet 52 is in the shape of an arc ring that matches the second leakage magnetic sheet accommodating groove 22 .

[0065] See also Figure 1 , Figure 2 and Figure 4 As shown, the first end face 71 of the circular arc ring-shaped first magnetic leakage sheet accommodating groove 21 and the third end face 72 of the circular arc ring-shaped second magnetic leakage sheet accommodating groove 22 are aligned with each other with a gap. The second end face 73 of the circular arc ring-shaped first magnetic leakage sheet accommodating groove 21 and the fourth end face 74 of the circular arc ring-shaped second magnetic leakage sheet accommodating groove 22 are aligned with each other with a gap. The first end face 71 and the third end face 72, which are arranged opposite to each other and have a gap in between, are connected by an extended connecting face 75 on the side close to the first skeleton 20. The second end face 73 and the fourth end face 74, which are arranged opposite to each other and have a gap in between, are connected by an extended connecting face 77 on the side close to the first skeleton 20.

[0066] When the first magnetic core assembly 10 with the first frame 20 and the second magnetic core assembly 30 with the second frame 40 are assembled, the first end face 71 and the third end face 72 which are arranged opposite to each other with a gap in between, the extended connecting face 75 and the second frame 40 form a first glue injection port 76 .

[0067] When the first magnetic core assembly 10 with the first frame 20 and the second magnetic core assembly 30 with the second frame 40 are assembled, the second end face 73 and the fourth end face 74, which are arranged opposite to each other and have a gap in between, and the extended connecting surface 77 form a second glue injection port 78 with the second frame 40. That is, a glue injection port is formed on both sides of the first leakage magnetic sheet accommodating groove 21 and the second leakage magnetic sheet accommodating groove 22, respectively, and corresponds to the gap between the two ends of the first leakage inductance magnetic sheet 51 and the second leakage inductance magnetic sheet 52. In the embodiment shown in the figure, the second frame 40 has a U-shaped fitting groove at the first glue injection port 76 and the second glue injection port 78.

[0068] So, see Figure 1 and Figure 4 As shown, preferably, the gap between the two ends of the first leakage inductance magnetic sheet 51 and the second leakage inductance magnetic sheet 52, that is, the first glue filling port 76 and the second glue filling port 78 are formed in the part of the middle column that is not surrounded by the side columns. This makes it convenient for the potting glue to fill the gap in the magnetic integrated transformer, which will be described in detail later. The above settings are all based on the first leakage magnetic sheet accommodating groove 21 and the second leakage magnetic sheet accommodating groove 22 shown in the figure being arranged on the first skeleton 20. Correspondingly, it can also be understood that one or both of the first leakage magnetic sheet accommodating groove 21 and the second leakage magnetic sheet accommodating groove 22 are arranged on the second skeleton 40.

[0069] The first center column 14 includes adjacent first sub-center columns 15 and second sub-center columns 16. The first magnetic plate 11 includes adjacent first sub-magnetic plates 17 and second sub-magnetic plates 18. Heat conductive material is provided between the first sub-center columns 15 and second sub-center columns 16 and the first sub-magnetic plates 17 and second sub-magnetic plates 18.

[0070] The second center column 34 includes an adjacent third sub-center column 35 and a fourth sub-center column 36 , and the second magnetic plate 31 includes an adjacent third sub-magnetic plate 37 and a fourth sub-magnetic plate 38 . Thermal conductive material is arranged between the third sub-center column 35 and the fourth sub-center column 36 and between the third sub-magnetic plate 37 and the fourth sub-magnetic plate 38 .

[0071] Specifically, the adjacent gap between the first sub-center column 15 and the second sub-center column 16 is on the same plane as the adjacent gap between the first sub-magnetic plate 17 and the second sub-magnetic plate 18. This gap can be filled with a heat-conducting metal material, such as a copper sheet, to conduct the heat at the first center column 14 to the outside of the first magnetic plate 11.

[0072] Specifically, the adjacent gap between the third sub-middle column 35 and the fourth sub-middle column 36 is on the same plane as the adjacent gap between the third sub-magnetic plate 37 and the fourth sub-magnetic plate 38. This gap can be filled with a heat-conducting metal material, such as a copper sheet, to conduct the heat at the second middle column 34 to the outside of the second magnetic plate 31.

[0073] See also Figure 4 and Figure 5As shown, the magnetic integrated transformer provided by the utility model further includes: a housing 62 and a potting glue 91, and the potting glue 91 fills the gap in the housing 62. Specifically, the potting glue 91 enters from the first potting glue port 76 to fill the gap in the magnetic integrated transformer, such as filling the gap between the first center column 14 and the first frame 20, the gap between the second center column 34 and the second frame 40, and flows out from the second potting glue port 78 to fill the gap between the magnetic integrated transformer and the housing 62. Or the potting glue 91 enters from the second potting glue port 78 to fill the gap in the magnetic integrated transformer, such as filling the gap between the first center column 14 and the first frame 20, the gap between the second center column 34 and the second frame 40, and flows out from the first potting glue port 76 to fill the gap between the magnetic integrated transformer and the housing 62.

[0074] The potting glue 91 may also be filled into the gap between the first sub-center column 15 and the second sub-center column 16 and the gap between the first sub-magnetic plate 17 and the second sub-magnetic plate 18 to serve as a heat-conducting material.

[0075] The potting glue 91 may also be filled into the gap between the third sub-center column 35 and the fourth sub-center column 36 and the gap between the third sub-magnetic plate 37 and the fourth sub-magnetic plate 38 to serve as a heat-conducting material.

[0076] See also Figure 5 As shown, the magnetic integrated transformer provided by the present invention further includes: a three-dimensional cooling water channel 92. The three-dimensional cooling water channel 92 is arranged on the outside of the housing 62.

[0077] See also Figure 5 As shown, the three-dimensional cooling water channel 92 includes: a first water channel 93 arranged outside the first magnetic plate 11 and parallel to the first magnetic plate 11; and a second water channel 94 arranged outside the second magnetic plate 31 and parallel to the second magnetic plate 31. The heat of the first center column 14 and the second center column 34 is transferred to the first magnetic plate 11 and the second magnetic plate 31, and is taken away by the three-dimensional cooling water channel 92.

[0078] The first leakage inductance magnetic sheet 51 and the second leakage inductance magnetic sheet 52 are arranged opposite to each other with a gap therebetween. Compared with the integral annular leakage magnetic sheet, this is beneficial for controlling the uniform distribution of magnetic resistance from the magnetic sheet to the magnetic cores on both sides, and is beneficial for reducing the diffuse magnetic flux without causing magnetic flux saturation.

[0079] As described above, the present invention realizes magnetic integration and reduces the volume of magnetic parts. At the same time, the rate of change of AC resistance (Rs) is smaller, and the average value of AC resistance (Rs) is also smaller, reducing the loss of energy conversion. And by setting a glue pouring channel, the potting glue 91 can fully fill the gap in the shell, so that even if the coating of the middle column is good, it can facilitate the heat extraction in the middle column and improve the reliability of the magnetic parts.

[0080] See also Figure 6As shown, the AC resistance (Rs) distribution at different frequencies of the prior art technical solution in which the leakage inductance magnetic sheet is a whole piece and there is no glue injection port 70 adjacent to the frame and the technical solution of the magnetic integrated transformer provided by the present application are shown. The change rate of the AC resistance (Rs) inside and outside the shell provided by the present application is smaller, and the average value of the AC resistance (Rs) is also smaller, thereby reducing the loss.

[0081] The technical effects that can be achieved by the magnetic integrated transformer provided by the utility model are: improving the integration level of the magnetic integrated transformer, reducing the volume, reducing the loss of the magnetic integrated transformer, facilitating the injection of potting glue and the setting of the cooling system, and improving the heat dissipation effect of the magnetic parts.

[0082] The above specific embodiments and accompanying drawings are only used to illustrate the technical solutions and technical effects of the utility model, and are not used to limit the utility model. Any person skilled in the art who is familiar with this technology can modify or change the above embodiments within the scope of the claims without violating the technical principles and spirit of the utility model, and all of them belong to the scope of protection of the utility model.

Claims

1. A magnetic integrated transformer, characterized in that: include: A first magnetic core component, the first magnetic core component comprises a first magnetic plate, a first side column, a second side column and a first middle column are arranged on the first magnetic plate, and the first middle column is located between the first side column and the second side column; a first frame is sleeved on the first middle column, and a first winding is wound on the first frame; A second magnetic core component, the second magnetic core component comprises a second magnetic plate, a third side column, a fourth side column and a second middle column are arranged on the second magnetic plate, and the second middle column is located between the third side column and the fourth side column; a second frame is sleeved on the second middle column, and a second winding is wound on the second frame; the first magnetic core component and the second magnetic core component are arranged opposite to each other, and the first magnetic plate and the second magnetic plate are located at both ends; A leakage inductance magnetic core assembly, wherein the leakage inductance magnetic core assembly comprises a first leakage inductance magnetic sheet and a second leakage inductance magnetic sheet, and there is a gap between both ends of the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet; the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet are arranged adjacent to the first frame and the second frame; The glue filling port is arranged adjacent to the first frame and the second frame, and corresponds to the gap between the two ends of the first leakage inductance magnetic sheet and the second leakage inductance magnetic sheet.

2. The magnetic integrated transformer according to claim 1, characterized in that: A first leakage magnetic sheet accommodating groove and a second leakage magnetic sheet accommodating groove are provided on the first skeleton and / or the second skeleton adjacent to the first skeleton, the first leakage inductance magnetic sheet is placed in the first leakage magnetic sheet accommodating groove, and the second leakage inductance magnetic sheet is placed in the second leakage magnetic sheet accommodating groove.

3. The magnetic integrated transformer according to claim 1 or 2, characterized in that: The first leakage inductance magnetic sheet includes a first leakage inductance sub-magnetic sheet and a second leakage inductance sub-magnetic sheet; The second leakage inductor magnetic sheet includes a third leakage inductor sub-magnetic sheet and a fourth leakage inductor sub-magnetic sheet.

4. The magnetic integrated transformer according to claim 2, characterized in that: The first magnetic leakage sheet accommodating groove is arranged on one side of the first frame or the second frame close to one side column, the first magnetic leakage sheet accommodating groove is an arc annular groove and is open on one side away from the first frame or the second frame, and when assembled, the opening is covered by the corresponding surface of the second frame or the first frame; The second magnetic leakage sheet accommodating groove is arranged on one side of the first frame or the second frame close to the other side column. The second magnetic leakage sheet accommodating groove is an arc ring groove and is open on one side away from the first frame or the second frame. When assembled, the opening is covered by the corresponding surface on the second frame or the first frame.

5. The magnetic integrated transformer according to claim 4, characterized in that: Both ends of the first arc-shaped leakage magnetic sheet accommodating groove and the second arc-shaped leakage magnetic sheet accommodating groove include end faces, and the end faces at both ends are aligned with a gap, and the opposite end faces with the gap are connected near the first frame or the second frame through an extended connecting surface, and the opposite end faces with the gap, the extended connecting surface and the second frame or the first frame form a glue filling port.

6. The magnetic integrated transformer according to claim 1, characterized in that: The first center column includes adjacent first sub-center column and second sub-center column, the first magnetic plate includes adjacent first sub-magnetic plate and second sub-magnetic plate, and a heat conductive material is arranged between the first sub-center column and the second sub-center column and the first sub-magnetic plate and the second sub-magnetic plate; The second center column includes adjacent third and fourth sub-center columns, the second magnetic plate includes adjacent third and fourth sub-magnetic plates, and heat conductive material is arranged between the third and fourth sub-center columns and the third and fourth sub-magnetic plates.

7. The magnetic integrated transformer according to claim 1, characterized in that: The first side column and the second side column at least partially surround the first center column; The third side column and the fourth side column at least partially surround the second middle column.

8. The magnetic integrated transformer according to claim 1, characterized in that: Also includes: Shell and potting compound; The potting glue enters from the potting port; The potting glue fills the gap in the shell.

9. The magnetic integrated transformer according to claim 8, characterized in that: The first center column includes adjacent first sub-center columns and second sub-center columns, the first magnetic plate includes adjacent first sub-magnetic plates and second sub-magnetic plates, and the potting glue fills the gap between the first sub-center column and the second sub-center column, and the gap between the first sub-magnetic plates and the second sub-magnetic plates; The second center column includes adjacent third sub-center column and fourth sub-center column, the second magnetic plate includes adjacent third sub-magnetic plate and fourth sub-magnetic plate, and the potting glue fills the gap between the third sub-center column and the fourth sub-center column, and the gap between the third sub-magnetic plate and the fourth sub-magnetic plate.

10. The magnetic integrated transformer according to claim 8, characterized in that: Also includes: Three-dimensional cooling water channel; the three-dimensional cooling water channel is arranged on the outside of the shell.

11. The magnetic integrated transformer according to claim 10, characterized in that: The three-dimensional cooling water channel comprises: a first water channel disposed outside the first magnetic plate and parallel to the first magnetic plate; A second water channel is arranged outside the second magnetic plate and parallel to the second magnetic plate.

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