N-phase interleaving DC / DC power supply module and power supply device

Abstract

The utility model provides an N-phase interleaved parallel DC / DC power supply module and a power supply device, and relates to the field of power supplies. By forming a three-dimensional interleaved parallel module scheme, a plurality of primary side circuit boards and a transformer magnetic core are overlapped and combined to form a sandwich structure, and the sandwich structure is vertically inserted into a mainboard after being combined with a secondary side circuit board; and the size of the interleaved and parallel magnetic parts is effectively reduced by using the magnetic integration design, the height space of a communication power supply and a server power supply is fully utilized, and the power density of the N-phase interleaved and parallel DC / DC power supply module and the power supply device in a high-power scene is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of power supplies, and in particular to an N-phase interleaved parallel DC / DC power supply module and a power supply device. Background Art

[0002] Communication power supply and server power supply are necessary power supply in data center and other fields. As data center supports more and more services, its power level is also getting higher and higher.

[0003] The industry often uses interleaved parallel technology to meet high power requirements, and interleaved parallel technology can also effectively reduce current ripple and improve the temperature performance and life of capacitor components.

[0004] In addition, with the rapid development of power electronics technology, the industry's demand for high-efficiency and high-power density switching power supply modules is becoming more and more common. In pursuit of high power density, switching power supplies tend to develop towards high frequency. High frequency switching power supplies can reduce the volume of magnetic parts, and PCB windings and magnetic cores can be combined into planar magnetic parts. Planar magnetic parts not only have the advantages of high power density and good heat dissipation performance, but are also very suitable for automated production due to their reproducibility.

[0005] However, although planar magnetics have the advantage of high power density, they still occupy a large space, which affects the power density of the power module. At present, most of the communication power supplies and server power supplies in the industry have industry standards to regulate their sizes to improve their versatility. For example, the height of current communication power supplies and server power supplies is generally 1U (44mm). If the height space cannot be fully utilized, its power density will also be affected. Utility Model Content

[0006] The present application provides an N-phase staggered parallel DC / DC power supply module, comprising:

[0007] N primary circuit boards, each of which has a first group of pins extending from a first side thereof, the first group of pins being used to be inserted into a main board; each of which has a primary switch unit arranged in an area close to its second side, a first group of through holes arranged in an area close to its third side, and windings arranged around the first group of through holes in the primary circuit board;

[0008] The first group of N+1 magnetic cores includes N L-shaped magnetic cores and a first I-shaped magnetic plate, wherein the N L-shaped magnetic cores each include an I-shaped magnetic plate, a side column extending from a first side of the I-shaped magnetic plate, and a middle column arranged on the I-shaped magnetic plate, wherein the middle column and the side column extend in the same direction, the I-shaped magnetic plates of the N L-shaped magnetic cores are arranged in parallel with the N primary circuit boards in a one-to-one correspondence, and the middle column thereon is penetrated into a through hole on the primary circuit board, and the first I-shaped magnetic plate is arranged on one side of the side column and the middle column of the outermost L-shaped magnetic core among the N L-shaped magnetic cores to form a closed magnetic circuit together with the outermost L-shaped magnetic core;

[0009] A secondary circuit board is provided with a secondary switch unit and a plurality of sockets, a second group of pins are extended from the fourth sides of N primary circuit boards, and the second group of pins are inserted into the sockets of the secondary circuit board, wherein the first side of the N primary circuit boards is opposite to the fourth side, and the second side is opposite to the third side, wherein N is a natural number.

[0010] Furthermore, the first group of N+1 magnetic cores and the windings in the N primary circuit boards form N planar transformers.

[0011] Furthermore, the N+1 magnetic cores and the windings in the N primary circuit boards further form N inductors, and the inductor windings are also arranged in the primary circuit board and disposed around the first group of through holes.

[0012] Furthermore, it also includes a second group of N+1 magnetic cores, including N E-shaped magnetic cores and a second I-shaped magnetic plate, the N E-shaped magnetic cores all include an I-shaped magnetic plate, side columns extending from the first side and the fourth side of the I-shaped magnetic plate respectively, and a middle column arranged on the I-shaped magnetic plate, wherein the extension direction of the middle column and the side column is the same, the I-shaped magnetic plates of the N E-shaped magnetic cores are arranged in parallel with the N primary circuit boards in a one-to-one correspondence, and the middle column thereon is penetrated into the second group of through holes on the primary circuit board, the second I-shaped magnetic plate is arranged on one side of the side column and the middle column of the outermost E-shaped magnetic core among the N E-shaped magnetic cores to form a closed magnetic circuit together with the outermost E-shaped magnetic core, and windings are arranged around the second group of through holes in the primary circuit board to form N planar inductors, wherein the first side of the second I-shaped magnetic plate is opposite to the fourth side.

[0013] Furthermore, the second group of N+1 magnetic cores are arranged between the first group of N+1 magnetic cores and the primary switch unit.

[0014] Furthermore, the fourth side of the I-shaped magnetic plate of the N L-shaped magnetic cores is flush with the edge of the middle column arranged on the I-shaped magnetic plate close to the fourth side, wherein the fourth side of the N L-shaped magnetic cores is opposite to the first side.

[0015] Furthermore, the fourth side of the I-shaped magnetic plate of the N L-shaped magnetic cores is higher than the edge of the middle column arranged on the I-shaped magnetic plate close to the fourth side, wherein the fourth side of the N L-shaped magnetic cores is opposite to the first side.

[0016] Furthermore, the height of the N-phase staggered parallel DC / DC power supply module is slightly less than 1U.

[0017] The present application also provides a power supply device, comprising: a mainboard; the above-mentioned N-phase staggered parallel DC / DC power supply module, the first group of pins of the N primary circuit boards are inserted into the sockets on the mainboard, so that the N primary circuit boards are vertically inserted on the mainboard, and the secondary circuit boards are parallel to the mainboard to form a power supply device with a height slightly less than 1U, wherein the height refers to the length of the power supply device along the direction from the first side to the fourth side of the N primary circuit boards; a fan, arranged on one side of the mainboard, and the air duct generated by the fan is parallel to the N primary circuit boards.

[0018] Furthermore, it also includes a connecting board, which is parallel to the N primary circuit boards, and a first side of which is inserted into the main board, and a fourth side is inserted into the secondary circuit board, so as to electrically connect the N-phase staggered parallel DC / DC power supply module with the main board, wherein the first side is opposite to the fourth side.

[0019] The features and technical advantages of the present disclosure have been summarized quite extensively above so that the detailed description disclosed below may be better understood. Additional features and advantages of the present disclosure will be described below, which constitute the subject matter of the claims of the present disclosure. It will be appreciated by those skilled in the art that the disclosed concepts and specific embodiments may be easily used as a basis for modifying or designing other structures or processes for achieving the same purpose of the present disclosure. It will also be appreciated by those skilled in the art that such equivalent structures do not depart from the spirit and scope of the present disclosure as set forth in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description in conjunction with the accompanying drawings, in which:

[0021] Figure 1 An exploded schematic diagram of an N-phase staggered parallel DC / DC power supply module according to an embodiment of the present application is shown;

[0022] Figure 2 Shows Figure 1 A circuit diagram of an N-phase interleaved parallel DC / DC power supply module;

[0023] Figure 3 It shows a schematic diagram of the structure of an N-phase staggered parallel DC / DC power supply module after assembly;

[0024] Figure 4 Shown include Figure 3 A schematic diagram of a power supply device structure of an N-phase staggered parallel DC / DC power supply module;

[0025] Figure 5 An exploded schematic diagram of an N-phase staggered parallel DC / DC power supply module according to another embodiment of the present application is shown;

[0026] Figure 6 An exploded schematic diagram of an N-phase staggered parallel DC / DC power supply module according to another embodiment of the present application is shown.

[0027] Unless otherwise indicated, corresponding parts and symbols in the different figures generally refer to corresponding parts. These figures are drawn to clearly illustrate the relevant aspects of the various embodiments and are not necessarily drawn to scale. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] An embodiment of the present application provides an N-phase staggered parallel DC / DC power supply module. Figure 1 The exploded schematic diagram of the N-phase staggered parallel DC / DC power supply module of an embodiment of the present application is shown in FIG. Figure 2 shown Figure 1 The circuit diagram of the N-phase staggered parallel DC / DC power supply module in FIG. Figure 2 As shown, the N-phase staggered parallel DC / DC power supply includes N primary switch units, such as primary switch units 61 to primary switch units 6n, N transformers, such as transformer T1 to transformer Tn and a secondary rectifier circuit 70. In one embodiment, the secondary rectifier circuit 70 can be formed by a plurality of secondary synchronous rectifier units, such as secondary synchronous rectifier units 71 to secondary synchronous rectifier units 7n. One of the primary switch units, one transformer and the secondary synchronous rectifier circuit form a one-phase DC / DC power supply, and the N-phase DC / DC power supplies are staggered in parallel to form an N-phase staggered parallel DC / DC power supply module. In practical applications, each phase of the DC / DC power supply may also include a resonant unit, such as a resonant unit formed by a resonant inductor Lr1 and a resonant capacitor Cr1 until a resonant unit formed by a resonant inductor Lrn and a resonant capacitor Crn.

[0030] However, the present application does not limit the specific structure of the secondary rectifier circuit 70, which can also be a full-wave rectifier circuit, a full-bridge rectifier circuit, etc. As long as the switch network can realize the rectification function, it is applicable to the present application. And each phase of the DC / DC power supply can include a rectifier unit unit, which together constitute the secondary rectifier circuit 70; or a multi-phase DC / DC power supply can share a rectifier unit unit. Similarly, the present application is not limited to the specific structure of the N primary switch units, which can be Figure 2 The full-bridge switch unit shown may also be a half-bridge switch unit, and any switch network that can realize the inversion function is applicable to the present application.

[0031] In practical applications, magnetic components such as transformers and inductors are usually the largest devices in power modules. How to reduce the size of magnetic components as much as possible and how to reasonably arrange the devices in N-phase staggered parallel DC / DC power modules to make rational use of the space in communication power supplies and server power supplies and improve their power density are the goals that the industry has been pursuing.

[0032] Based on this, see Figure 2 , the N-phase staggered parallel DC / DC power supply module provided in the present application includes:

[0033] N primary circuit boards 110, each of which has a first group of pins 117 extending from a first side 111 thereof, the first group of pins 117 being used to be inserted into a main board; each of which has a primary switch unit 115 arranged in an area close to its second side 112, a first group of through holes 116 arranged in an area close to its third side 113, and a winding arranged around the first group of through holes 116 in the primary circuit board;

[0034] The first group of N+1 magnetic cores 120 includes N L-shaped magnetic cores 121 and a first I-shaped magnetic plate 122. The N L-shaped magnetic cores 121 each include an I-shaped magnetic plate 1211, a side column 1212 extending from a first side of the I-shaped magnetic plate, and a middle column 1213 arranged on the I-shaped magnetic plate 1211, wherein the middle column 1213 has the same extension direction as the side column 1212. The I-shaped magnetic plates 1211 of the N L-shaped magnetic cores 121 are arranged in parallel with the N primary circuit boards 110 in a one-to-one correspondence, and the middle column 1213 thereon is passed through the through hole 116 on the primary circuit board 110. The first I-shaped magnetic plate 122 is arranged on one side of the side column 1212 and the middle column 1213 of the outermost L-shaped magnetic core among the N L-shaped magnetic cores 121, so as to form a closed magnetic circuit together with the outermost L-shaped magnetic core.

[0035] A secondary circuit board 130 is provided with a secondary switch unit 131 and a plurality of sockets 132, and a second group of pins 118 extend from the fourth sides 114 of the N primary circuit boards 110, and the second group of pins 118 are inserted into the sockets 132 of the secondary circuit board 130, wherein the first side 111 of the N primary circuit boards 110 is opposite to the fourth side 114, and the second side 112 is opposite to the third side 113, wherein N is a natural number.

[0036] Among them, the first group of N+1 magnetic cores 120 and the windings in the N primary circuit boards 110 form N planar transformers. Specifically, the first I-shaped magnetic plate 122 and the side column 1212, I-shaped magnetic plate 1211 and middle column 1213 of the outermost L-shaped magnetic core among the N L-shaped magnetic cores 121 form a closed magnetic circuit, and the side column 1212, I-shaped magnetic plate 1211 and middle column 1213 of the remaining N-1 L-shaped magnetic cores 121 form a closed magnetic circuit with the I-shaped magnetic plate 1211 of the adjacent L-shaped magnetic core 121, thereby forming N planar transformers, which shows that the magnetic core can be shared, that is, magnetic integration is achieved, the volume of the magnetic core is reduced, and the power density of the N-phase staggered parallel DC / DC power supply module is further improved.

[0037] In addition, by using printed circuit boards instead of traditional Litz wire windings, the production process is simplified, making it easier to mass produce, reducing production costs, and the parameters of the magnetic parts are more consistent.

[0038] See also Figure 3 The schematic diagram of the structure of the N-phase staggered parallel DC / DC power supply module after assembly is shown, which forms a power supply module similar to a rectangular parallelepiped. Figure 4 Shown include Figure 3 The schematic diagram of the power supply device structure of the N-phase staggered parallel DC / DC power supply module in FIG. Figure 3 and Figure 4 As shown, the rectangular N-phase staggered parallel DC / DC power supply module is inserted into the socket (blocked in the figure) on the mainboard 30 through the first group of pins 117 thereon, so that the N-phase staggered parallel DC / DC power supply module is vertically inserted on the mainboard 30, which effectively utilizes the height space of the power supply device, especially for communication power supplies and server power supplies that are generally 1U (44mm) in height. The height space of the power supply device itself is effectively utilized, which can reduce the space occupied on its plane and effectively improve its power density.

[0039] Furthermore, Figure 1 , Figure 3 and Figure 4 As shown, the N primary circuit boards 110 are arranged parallel to each other, and the corresponding first group of N+1 magnetic cores 120 are also arranged parallel to each other in the same direction as the N primary circuit boards 110, and there is a space 150 (such as Figure 3As shown in FIG. 1 ), the wind or coolant can completely pass through the gap between the primary circuit board and the first group of N+1 magnetic cores 120 to take away the heat therein, and the magnetic core and the primary circuit board are three-dimensionally wrapped by the wind or coolant, and the heat dissipation effect is greatly improved. That is, the N-phase interleaved parallel DC / DC power supply module has excellent heat dissipation performance in both air cooling and immersion liquid cooling scenarios, which can improve the reliability of the N-phase interleaved parallel DC / DC power supply module, or further reduce the size of the N-phase interleaved parallel DC / DC power supply module when necessary.

[0040] In practical applications, see Figure 4 For an air-cooled power supply device, it usually also includes a fan 20. The fan 20 is arranged on one side of the mainboard 30, and the air duct it generates is parallel to the N primary circuit boards 110, that is, the wind can pass through the gap between the primary circuit board and the magnetic core and take away the heat therein. The magnetic core and the primary circuit board are three-dimensionally exposed to the wind, and have excellent heat dissipation performance in the air-cooled scenario.

[0041] And if Figure 1 , Figure 3 and Figure 4 As shown, the primary switch unit 115 is arranged in the area of ​​the primary circuit board close to the second side 112, and the first group of N+1 magnetic cores 120 is arranged in the area of ​​the primary circuit board close to the third side 113. The heat generating components on the primary circuit board can be arranged separately, which can improve the reliability of the primary switch tube and the planar transformer. In addition, the secondary switch unit 131 is arranged on a separate secondary circuit board 130, which can avoid the layout difficulties, heat dissipation difficulties and insufficient space problems that may be caused when the secondary switch unit 131 and the primary switch unit are arranged on the same circuit board. And as Figure 4 As shown, the wind generated by the fan 20 also blows through the secondary switch unit 131 on the secondary circuit board 130 , which is beneficial to dissipate heat for the secondary switch unit 131 .

[0042] Please refer to Figure 1 , Figure 3 and Figure 4 As shown, the N-phase staggered parallel DC / DC power supply module proposed in this application is a three-dimensional staggered parallel module solution, which overlaps and combines multiple primary circuit boards and transformer cores to form a sandwich structure, which is vertically inserted into the mainboard after being combined with the secondary circuit board, and uses magnetic integration design to effectively reduce the volume of the magnetic parts after staggered parallel connection, effectively improving the power density of the N-phase staggered parallel DC / DC power supply module in high-power scenarios. The height of the specific N-phase staggered parallel DC / DC power supply module proposed in this application is slightly smaller than the height of the communication power supply and the server power supply, that is, slightly smaller than 1U, such as between 0.9U and 1U, or further, between 0.7U and 1U, so as to be suitable for communication power supply and server power supply.

[0043] In practical applications, the primary circuit board 110 may further include a primary driving circuit, and the secondary circuit board 130 may further include a secondary driving circuit.

[0044] In practical applications, the rectifier module on the secondary circuit board 130 can connect the pins of the secondary winding of the N-phase DC / DC power supply together to perform synchronous rectification.

[0045] In practical applications, for Figure 1 The N-phase staggered parallel DC / DC power supply module is formed, and the first group of N+1 magnetic cores 120 and the windings in the N primary circuit boards 110 also form N inductors. At this time, the inductor windings are also arranged in the primary circuit board 110 and arranged around the first group of through holes 116. That is, the integrated magnetic component at this time integrates the transformer and the inductor at the same time. The inductor can be Figure 1 The resonant inductor in the transformer can also be the leakage inductance of the transformer. This can further reduce the size of the N-phase interleaved parallel DC / DC power supply module.

[0046] See also Figure 5 The exploded schematic diagram of an N-phase staggered parallel DC / DC power supply module according to another embodiment of the present application is shown in FIG. Figure 1 The N-phase staggered parallel DC / DC power supply module shown in the figure also includes: a second group of N+1 magnetic cores 140, including N E-shaped magnetic cores 141 and a second I-shaped magnetic plate 142, the N E-shaped magnetic cores 141 each include an I-shaped magnetic plate 1411, side columns 1412 extending from the first side and the fourth side of the I-shaped magnetic plate 1411, and a middle column 1413 arranged on the I-shaped magnetic plate 1411, wherein the middle column 1413 and the side column 1412 extend in the same direction, and the I-shaped magnetic plate 1411 of the N E-shaped magnetic cores 141 is provided with a plurality of magnetic cores 140, each including an I-shaped magnetic plate 1411, a side column 1412 extending from the first side and the fourth side of the I-shaped magnetic plate 1411, and a middle column 1413 arranged on the I-shaped magnetic plate 1411. The I-shaped magnetic plate is arranged in parallel with the N primary circuit boards 110 in a one-to-one correspondence, and the middle column 1413 thereon is passed through the second group of through holes 119 on the primary circuit board 110. The second I-shaped magnetic plate 142 is arranged on one side of the side column and the middle column of the outermost E-shaped magnetic core among the N E-shaped magnetic cores to form a closed magnetic circuit together with the outermost E-shaped magnetic core. Windings are arranged around the second group of through holes 119 in the primary circuit board 110 to form N planar inductors, wherein the first side of the I-shaped magnetic plate is opposite to the fourth side.

[0047] See also Figure 3 The N-phase interleaved parallel DC / DC power supply module shown includes a second group of N+1 magnetic cores 140. The assembly method of the second group of N+1 magnetic cores 140 is the same as that of the first group of N+1 magnetic cores 120, and the principle of magnetic integration is also the same, which will not be repeated here.

[0048] Please refer to Figure 3, the second group of N+1 magnetic cores 140 is arranged between the first group of N+1 magnetic cores 120 and the primary switch unit 115. When the inductance formed by the second group of N+1 magnetic cores 140 is the primary inductance (such as Figure 1 When the primary resonant inductor is 1 / 2, the second group of N+1 magnetic cores 140 is close to the primary switch unit 115, which can shorten the length of the wiring that forms an electrical connection between the second group of N+1 magnetic cores 140 and the primary switch unit 115, thereby reducing power loss and improving efficiency. Similarly, a space can be left between the N primary circuit boards 110 and the second group of N+1 magnetic cores 140 disposed thereon. Please refer to Figure 4 Then, wind or cooling liquid can completely pass through the gap between the primary circuit board and the second group of N+1 magnetic cores 140 and take away the heat therein.

[0049] In practical applications, such as Figure 5 As shown, the N primary circuit boards 110 further include a first recess and a hole 1121, which are used to respectively accommodate the side columns 1412 of the N E-shaped magnetic cores 141 in the second group of N+1 magnetic cores 140. The N primary circuit boards 110 further include a second recess 1122, which are used to accommodate the side columns 1212 of the N L-shaped magnetic cores 121 in the first group of N+1 magnetic cores 120. Of course, the present application does not limit the relative positional relationship between the side columns and the primary circuit boards, as long as a closed magnetic circuit can be formed and the middle column is passed through the through hole on the primary circuit board.

[0050] Please refer to Figure 4 The present application also provides a power supply device, comprising: a mainboard 30; the above-mentioned N-phase staggered parallel DC / DC power supply module 10, the first group of pins of the N primary circuit boards are inserted into the sockets on the mainboard, so that the N primary circuit boards are vertically inserted on the mainboard, and the secondary circuit boards are parallel to the mainboard to form a power supply device with a height slightly less than 1U, wherein the height refers to the length of the power supply device along the direction from the first side to the fourth side of the N primary circuit boards; a fan 20, which is arranged on one side of the mainboard, and the air duct it generates is parallel to the N primary circuit boards.

[0051] The principle is the same as above and will not be repeated here.

[0052] In one embodiment, the power supply device is a server power supply or a communication power supply, thereby improving the power density of the server power supply or the communication power supply.

[0053] Please refer to Figure 4 The power supply device also includes a connecting board 11, which is parallel to the N primary circuit boards 110, and a first side of the connecting board 11 is inserted into the main board 30, and a fourth side is inserted into the secondary circuit board 130, so as to form an electrical connection between the N-phase staggered parallel DC / DC power supply module 10 and the main board 30, wherein the first side is opposite to the fourth side.

[0054] The present application also provides an assembly method for the above-mentioned N-phase staggered parallel DC / DC power supply module, which can be found in Figure 1 and Figure 5 ,include:

[0055] S1: providing N primary circuit boards, each of which has a first group of pins extending from a first side thereof; each of which has a primary switch unit arranged in an area close to its second side, a first group of through holes arranged in an area close to its third side, and a winding arranged around the first group of through holes in the primary circuit board;

[0056] S2: providing a first group of N+1 magnetic cores, including N L-shaped magnetic cores and an I-shaped magnetic plate, wherein the N L-shaped magnetic cores each include an I-shaped magnetic plate, a side column extending from a first side of the I-shaped magnetic plate, and a middle column disposed on the I-shaped magnetic plate, wherein the middle column and the side column extend in the same direction;

[0057] S2: N L-shaped magnetic cores are arranged in parallel with their I-shaped magnetic plates in a one-to-one correspondence with N primary circuit boards, and the middle columns on the L-shaped magnetic cores are inserted into the first set of through holes on the primary circuit boards;

[0058] S4: placing the first I-shaped magnetic plate on one side of the side column and the middle column of the outermost L-shaped magnetic core among the N L-shaped magnetic cores, so as to form a closed magnetic circuit together with the outermost L-shaped magnetic core;

[0059] S4: Provide a secondary circuit board, on which a secondary switch unit and a plurality of sockets are disposed, and insert the second group of pins extending from the fourth sides of N primary circuit boards into the sockets of the secondary circuit board, wherein the first sides of the N primary circuit boards are opposite to the fourth side, and the second sides are opposite to the third side, and N is a natural number.

[0060] So formed Figure 3 The principles and advantages of the N-phase interleaved parallel DC / DC power supply module 10 shown are the same as those described above and will not be described in detail here.

[0061] Furthermore, the present invention further comprises: inserting the first group of pins extending from the first side of the primary circuit board into a socket of a main board, so that the N primary circuit boards are vertically inserted on the main board, and the secondary circuit board is parallel to the main board. Figure 4 The power supply device shown in the figure has the same principles and advantages as those described above and will not be described in detail here.

[0062] Furthermore, step S2 also includes: providing a second group of N+1 magnetic cores, including N E-shaped magnetic cores and an I-shaped magnetic plate, the N E-shaped magnetic cores all include an I-shaped magnetic plate, side columns extending from the first side and the fourth side of the I-shaped magnetic plate respectively, and a middle column arranged on the I-shaped magnetic plate, wherein the extension direction of the middle column and the side column is the same; step S3 also includes: arranging the N E-shaped magnetic cores in parallel with their I-shaped magnetic plates corresponding to the N primary circuit boards one by one, and the middle column thereon is passed through a second group of through holes on the primary circuit board, wherein windings are arranged around the second group of through holes in the primary circuit board; step S4 also includes: arranging the second I-shaped magnetic plate on one side of the side column and the middle column of the outermost E-shaped magnetic core among the N E-shaped magnetic cores, so as to form a closed magnetic circuit together with the outermost E-shaped magnetic core.

[0063] The principles and advantages are the same as above and will not be repeated here.

[0064] As mentioned above, one secondary circuit board is taken as an example. In actual application, multiple secondary circuit boards may be included. The layout positions of the secondary circuit boards are the same as those described above and will not be described in detail here.

[0065] As described above, the first sides of the primary circuit board 110, the first group of N+1 magnetic cores 120 and the second group of N+1 magnetic cores 140 are the same side, all referring to the side close to the main board 30; their fourth sides are the same side, all referring to the side away from the main board 30.

[0066] As described above, the N L-shaped magnetic cores 121 of the first group of N+1 magnetic cores 120 and the N E-shaped magnetic cores 141 of the second group of N+1 magnetic cores 140 are respectively located on the same side of the corresponding N primary circuit boards 110, and the first I-shaped magnetic plate 122 and the second I-shaped magnetic plate 142 are located on the opposite sides of the outermost primary circuit board 110. This forms a structure in which the primary circuit board is parallel to the magnetic core, and magnetic integration is achieved at the same time.

[0067] Furthermore, for the first group of N+1 magnetic cores 120 used to form a planar transformer, the side columns 1212, I-shaped magnetic plates 1211, middle columns 1213 and adjacent magnetic cores of the N L-shaped magnetic cores 121 form a closed magnetic circuit, which shows that the magnetic core portion above the middle column (close to the fourth side) does not pass the magnetic flux, and the size of this portion can be adjusted according to actual conditions. In one embodiment, if Figure 1 As shown, the fourth side 1214 of the I-shaped magnetic plate 1211 of the N L-shaped magnetic cores 121 is higher than the edge of the middle column 1213 disposed on the I-shaped magnetic plate 1211 close to the fourth side 1214, as shown in FIG. Figure 1 As shown, it is higher than the distance h. The magnetic core higher than the edge of the middle column 1213 can be used to achieve magnetic shielding to prevent the magnetic component from interfering with other devices. Therefore, in practical applications, a suitable distance h can be selected according to design requirements.

[0068] In one embodiment, if Figure 6The exploded schematic diagram of an N-phase staggered parallel DC / DC power supply module of another embodiment of the present application can also be designed so that the fourth side 1214 of the I-shaped magnetic plate 1211 of the N L-shaped magnetic cores 121 is flush with the edge of the middle column 1213 arranged on the I-shaped magnetic plate 1211 close to the fourth side 1214.

[0069] Although the embodiments of the present disclosure and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the disclosure as defined by the appended claims.

[0070] In addition, the processes, machines, manufactures, material compositions, devices, methods, and steps described in the specification of the present application are only specific embodiments. As those of ordinary skill in the art will readily appreciate from the disclosure of the present disclosure, processes, machines, manufactures, material compositions, means, methods, or steps that perform substantially the same functions currently exist or will be developed in the future or achieve substantially the same results as the corresponding embodiments described herein that can be used according to the present disclosure. Therefore, the appended claims are intended to include such processes, machines, manufactures, material compositions, devices, methods, or steps within their scope.

Claims

1. An N-phase staggered parallel DC / DC power supply module, characterized in that: include: N primary circuit boards, each of which has a first group of pins extending from a first side thereof, the first group of pins being used to be inserted into a main board; each of which has a primary switch unit arranged in an area close to its second side, a first group of through holes arranged in an area close to its third side, and windings arranged around the first group of through holes in the primary circuit board; The first group of N+1 magnetic cores includes N L-shaped magnetic cores and a first I-shaped magnetic plate, wherein the N L-shaped magnetic cores each include an I-shaped magnetic plate, a side column extending from a first side of the I-shaped magnetic plate, and a middle column arranged on the I-shaped magnetic plate, wherein the middle column and the side column extend in the same direction, the I-shaped magnetic plates of the N L-shaped magnetic cores are arranged in parallel with the N primary circuit boards in a one-to-one correspondence, and the middle column thereon is penetrated into a through hole on the primary circuit board, and the first I-shaped magnetic plate is arranged on one side of the side column and the middle column of the outermost L-shaped magnetic core among the N L-shaped magnetic cores to form a closed magnetic circuit together with the outermost L-shaped magnetic core; A secondary circuit board is provided with a secondary switch unit and a plurality of sockets, a second group of pins are extended from the fourth sides of N primary circuit boards, and the second group of pins are inserted into the sockets of the secondary circuit board, wherein the first side of the N primary circuit boards is opposite to the fourth side, and the second side is opposite to the third side, wherein N is a natural number.

2. The N-phase interleaved parallel DC / DC power supply module according to claim 1, characterized in that: The first group of N+1 magnetic cores and the windings in the N primary circuit boards form N planar transformers.

3. The N-phase interleaved parallel DC / DC power supply module according to claim 2, characterized in that: The N+1 magnetic cores and the windings in the N primary circuit boards also form N inductors, and the inductor windings are also arranged in the primary circuit board and are arranged around the first group of through holes.

4. The N-phase interleaved parallel DC / DC power supply module according to claim 2, characterized in that: It also includes a second group of N+1 magnetic cores, including N E-shaped magnetic cores and a second I-shaped magnetic plate, the N E-shaped magnetic cores all include an I-shaped magnetic plate, side columns extending from the first side and the fourth side of the I-shaped magnetic plate respectively, and a middle column arranged on the I-shaped magnetic plate, wherein the middle column and the side columns have the same extension direction, the I-shaped magnetic plates of the N E-shaped magnetic cores are arranged in parallel with the N primary circuit boards in a one-to-one correspondence, and the middle column thereon is penetrated into the second group of through holes on the primary circuit board, the second I-shaped magnetic plate is arranged on one side of the side column and the middle column of the outermost E-shaped magnetic core among the N E-shaped magnetic cores to form a closed magnetic circuit together with the outermost E-shaped magnetic core, windings are arranged around the second group of through holes in the primary circuit board to form N planar inductors, wherein the first side of the second I-shaped magnetic plate is opposite to the fourth side.

5. The N-phase interleaved parallel DC / DC power supply module according to claim 4, characterized in that: The second group of N+1 magnetic cores is arranged between the first group of N+1 magnetic cores and the primary switch unit.

6. The N-phase interleaved parallel DC / DC power supply module according to claim 1, characterized in that: The fourth side of the I-shaped magnetic plate of the N L-shaped magnetic cores is flush with the edge of the middle column arranged on the I-shaped magnetic plate close to the fourth side, wherein the fourth side of the N L-shaped magnetic cores is opposite to the first side.

7. The N-phase interleaved parallel DC / DC power supply module according to claim 1, characterized in that: The fourth side of the I-shaped magnetic plate of the N L-shaped magnetic cores is higher than the edge of the middle column disposed on the I-shaped magnetic plate close to the fourth side, wherein the fourth side of the N L-shaped magnetic cores is opposite to the first side.

8. The N-phase interleaved parallel DC / DC power supply module according to claim 1, characterized in that: The height of the N-phase staggered parallel DC / DC power supply module is slightly less than 1U.

9. A power supply device, characterized in that: include: Motherboard; The N-phase staggered parallel DC / DC power supply module of claim 1, wherein the first group of pins of the N primary circuit boards are inserted into the sockets on the main board, so that the N primary circuit boards are vertically inserted into the main board, and the secondary circuit boards are parallel to the main board to form a power supply device with a height slightly less than 1U, wherein the height refers to the length of the power supply device along the direction from the first side to the fourth side of the N primary circuit boards; The fan is arranged on one side of the mainboard, and the air duct generated by the fan is parallel to the N primary circuit boards.

10. The power supply device according to claim 9, characterized in that: It also includes a connecting board, which is parallel to the N primary circuit boards, and has a first side inserted on the main board, and a fourth side inserted on the secondary circuit board, so as to electrically connect the N-phase staggered parallel DC / DC power supply module with the main board, wherein the first side is opposite to the fourth side.

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