A transformer integrated with a common mode inductor

Abstract

The utility model discloses a transformer of integrated common mode inductance belongs to power electronics field, including magnetic core subassembly and winding subassembly, winding subassembly is around the magnetic core subassembly or is arranged in the accommodating space formed by the magnetic core subassembly, the magnetic core subassembly includes first magnetic core and second magnetic core, first magnetic core with second magnetic core opposite setting, first magnetic core, second magnetic core each includes first side post, first middle column, second middle column, second side post with first cross column, first side post, first middle column, second middle column, second side post are sequentially parallelly arranged, and first cross column is connected first side post, first middle column, second middle column with second side post, the utility model discloses a transformer of integrated common mode inductance can significantly reduce the volume of magnetic core, and promote electromagnetic performance simultaneously, thereby realizes the improvement of power power density.

Description

Technical Field

[0001] This utility model relates to the field of power electronics, and in particular to a transformer with an integrated common-mode inductor. Background Technology

[0002] In recent years, with the rapid development of power electronics technology towards higher frequencies and higher power densities, power supply systems have placed higher demands on the space utilization of key magnetic components, namely, continuously increasing power density while maintaining the same volume. However, achieving this goal faces many challenges due to the limited space resources within the power supply.

[0003] As the core component of transformers and inductors, the magnetic core occupies a significant portion of the power supply's internal volume. Traditionally, independently designed transformer cores and common-mode inductor cores occupy substantial space, severely limiting the improvement of power density. While some existing technologies attempt to optimize the core structure, it remains difficult to significantly reduce the overall core volume while maintaining electromagnetic performance. For example… Figure 1 The transformer 1 shown includes a core assembly 11 and a winding assembly 12. The core assembly 11 includes a first core 111, a second core 112, and a third core 113. The winding assembly 12 includes a first winding 121, a second winding 122, a third winding 123, a fourth winding 124, a fifth winding 125, and a sixth winding 126. The first winding 121, the second winding 122, and the first core 111 form a first transformer group. The fifth winding 125, the sixth winding 126, and the second core 112 together form a common-mode inductor. The third winding 123, the fourth winding 124, and the third core 113 form a second transformer group. Figure 1 The three magnetic cores occupy a large volume. Figure 2 The transformer 2 shown includes a core assembly 21 and a winding assembly 22. The core assembly 21 includes a first core 211 and a second core 212; the winding assembly 22 includes a first winding 221, a second winding 222, a fifth winding 225, and a sixth winding 226. The first winding 221, the second winding 222, and the first core 211 form a transformer group. The fifth winding 225, the sixth winding 226, and the second core 212 together form a common-mode inductor. Figure 2 The two magnetic cores occupy a large volume.

[0004] Therefore, there is an urgent need for an innovative transformer structure to effectively reduce the space occupied by the magnetic core in the power supply, while improving electromagnetic performance, thereby achieving a further increase in power density. Utility Model Content

[0005] The present invention aims to provide a transformer with integrated common-mode inductor.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A transformer with integrated common-mode inductance includes a core assembly and a winding assembly. The winding assembly is wound on the core assembly or disposed within a receiving space formed by the core assembly. The core assembly includes a first core and a second core, which are disposed opposite to each other. Each of the first core and the second core includes a first side post, a first middle post, a second middle post, a second side post, and a first transverse post. The first side post, the first middle post, the second middle post, and the second side post are arranged in parallel in sequence, and the first transverse post connects the first side post, the first middle post, the second middle post, and the second side post.

[0007] In one specific embodiment, the winding assembly includes a first winding and a second winding, wherein the first winding and the second winding are wound on the first side post of the first magnetic core or the first side post of the second magnetic core.

[0008] Furthermore, the winding assembly also includes a third winding and a fourth winding, wherein the third winding and the fourth winding are wound on the second side post of the first magnetic core or the second side post of the second magnetic core.

[0009] Furthermore, the winding assembly also includes a fifth winding and a sixth winding, wherein the fifth winding and the sixth winding are disposed in the receiving space formed by the first and second central columns of the first magnetic core or the first and second central columns of the second magnetic core.

[0010] In one specific embodiment, the first winding, the second winding, the third winding, the fourth winding, the fifth winding, and the sixth winding are implemented using printed circuit board windings.

[0011] Furthermore, the first side post of the first magnetic core and the first side post of the second magnetic core are disposed opposite each other through through holes on the printed circuit board where the first winding and the second winding are located; the second side post of the first magnetic core and the second side post of the second magnetic core are disposed opposite each other through through holes on the printed circuit board where the third winding and the fourth winding are located; the printed circuit board where the fifth winding and the sixth winding are located is disposed in the receiving space formed by the first and second central posts of the first magnetic core and the first and second central posts of the second magnetic core.

[0012] In one specific embodiment, the winding assembly includes a first winding and a second winding, wherein the first winding and the second winding are wound on the first and second central columns of the first magnetic core or the first and second central columns of the second magnetic core.

[0013] Furthermore, the winding assembly also includes a fifth winding and a sixth winding, which are disposed in the receiving space formed by the first and second central columns of the first magnetic core or the first and second central columns of the second magnetic core, and are located on the same side of the first winding and the second winding.

[0014] In one specific embodiment, the first winding, the second winding, the fifth winding, and the sixth winding are implemented using printed circuit board windings.

[0015] Furthermore, the first and second central pillars of the first magnetic core and the first and second central pillars of the second magnetic core are arranged opposite each other through through holes on the printed circuit board where the first winding and the second winding are located; the printed circuit board where the fifth and sixth windings are located is located in the accommodating space formed by the first and second central pillars of the first magnetic core or the first and second central pillars of the second magnetic core. Beneficial effects: The transformer with integrated common-mode inductor provided by this utility model can realize one or two sets of discrete transformers and a common-mode inductor by setting the magnetic core structure; it can significantly reduce the volume occupied by the magnetic core, while improving electromagnetic performance, thereby increasing the power density of the power supply. In addition, the windings in the transformer of this utility model can be implemented using printed circuit board (PCB) windings, thereby reducing the volume of the windings and further increasing the power density of the power supply.

[0016] To make the above-mentioned features and advantages of the utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a traditional transformer.

[0018] Figure 2 This is a schematic diagram of another traditional transformer.

[0019] Figure 3 This is a schematic diagram of the structure of a first specific embodiment of a transformer with integrated common-mode inductor according to the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of a second specific embodiment of a transformer with integrated common mode inductor according to the present invention.

[0021] Figure 5 This is a structural schematic diagram of a third specific embodiment of a transformer with integrated common-mode inductor according to the present invention.

[0022] Figure 6 This is a structural schematic diagram of a fourth specific embodiment of a transformer with integrated common-mode inductor according to the present invention.

[0023] Figure 7 This is a structural schematic diagram of the fifth specific embodiment of a transformer with integrated common-mode inductor according to the present invention.

[0024] In the accompanying drawings, similar reference numerals refer to the same elements. Detailed Implementation

[0025] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] The following section introduces a transformer with an integrated common-mode inductor, based on this invention. Figure 3 This is a schematic diagram of the structure of a first specific embodiment of a transformer with an integrated common-mode inductor according to this utility model. Figure 3 As shown, the transformer 3 provided in this embodiment includes a magnetic core assembly 31 and a winding assembly 32. The winding assembly 32 is wound on the magnetic core assembly 31 or disposed in the accommodating space formed by the magnetic core assembly 31.

[0028] Furthermore, the magnetic core assembly 31 includes a first magnetic core 311 and a second magnetic core 312, with the first magnetic core 311 and the second magnetic core 312 arranged opposite to each other to form an accommodating space.

[0029] Furthermore, the first magnetic core 311 includes a first side post 3111, a first middle post 3112, a second middle post 3113, a second side post 3114, and a first transverse post 3115. The first side post 3111, the first middle post 3112, the second middle post 3113, and the second side post 3114 are arranged in parallel in sequence, and the first transverse post 3115 connects the first side post 3111, the first middle post 3112, the second middle post 3113, and the second side post 3114.

[0030] Furthermore, the first magnetic core 311 and the second magnetic core 312 have the same structure. The second magnetic core 312 includes a first side post 3121, a first middle post 3122, a second middle post 3123, a second side post 3124, and a first horizontal post 3125. The first side post 3121, the first middle post 3122, the second middle post 3123, and the second side post 3124 are arranged in parallel in sequence. The first horizontal post 3125 connects the first side post 3121, the first middle post 3122, the second middle post 3123, and the second side post 3124.

[0031] Further, the winding assembly 32 includes a first winding 321 and a second winding 322. The first winding 321 is wound on the first side post 3111 of the first magnetic core 311 or the first side post 3121 of the second magnetic core 312, and the second winding 322 is wound on the first side post 3111 of the first magnetic core 311 or the first side post 3121 of the second magnetic core 312. The current flowing through the first winding 321 is... i 1. The current flowing through the second winding 322 is i 2. The first winding 321, the second winding 322, the first side post 3111 and the first middle post 3112 of the first magnetic core 311, and the first side post 3121 and the first middle post 3122 of the second magnetic core 312 together constitute the first transformer group, and the current... i 1 and current i The directions of 2 are opposite, resulting in a magnetic flux of φ 1.

[0032] Furthermore, the winding assembly 32 also includes a third winding 323 and a fourth winding 324. The third winding 323 is wound on the second post 3114 of the first magnetic core 311 or the second post 3124 of the second magnetic core 312, and the fourth winding 324 is wound on the second post 3114 of the first magnetic core 311 or the second post 3124 of the second magnetic core 312. The current flowing through the third winding 323 is... i 3. The current flowing through the fourth winding 324 is i 4. The third winding 323, the fourth winding 324, the second side post 3114 and the second middle post 3113 of the first magnetic core 311, and the second side post 3124 and the second middle post 3123 of the second magnetic core 312 together constitute the second transformer group. Current... i 3 and current i The direction of 4 is opposite, and the resulting magnetic flux is φ 2.

[0033] Furthermore, the winding assembly 32 also includes a fifth winding 325 and a sixth winding 326. The fifth winding 325 is disposed in the receiving space formed by the first central column 3112 and the second central column 3113 of the first magnetic core 311 or the first central column 3122 and the second central column 3123 of the second magnetic core 312. The sixth winding 326 is disposed in the receiving space formed by the first central column 3112 and the second central column 3113 of the first magnetic core 311 or the first central column 3122 and the second central column 3123 of the second magnetic core 312. The current flowing through the fifth winding 325 is... i 5. The current flowing through the sixth winding 326 is i 6. The fifth winding 325, the sixth winding 326, the first central column 3112 and the second central column 3113 of the first magnetic core 311, and the first central column 3122 and the second central column 3123 of the second magnetic core 312 constitute a common mode inductor.

[0034] More specifically, there may be an air gap between the first magnetic core 311 and the second magnetic core 312. By adjusting the width of the air gap in the middle column, the inductance of the common mode inductor can be adjusted.

[0035] Compared to Figure 1 The transformer 1 in this specific embodiment and the transformer 3 can still realize two separate transformers and a common mode inductor; and the magnetic flux generated by the first winding 321, the second winding 322, the third winding 323 and the fourth winding 324 will not pass through the fifth winding 325 and the sixth winding 326, and will not interfere with each other, thus not affecting the working performance of the circuit. It can significantly reduce the volume occupied by the magnetic core and improve the electromagnetic performance, thereby further improving the power density of the power supply.

[0036] Figure 4 This is a schematic diagram of a second specific embodiment of a transformer with an integrated common-mode inductor according to the present invention. Figure 4 As shown, the transformer 4 provided in this embodiment includes a magnetic core assembly 41 and a winding assembly 42. The winding assembly 42 is wound on the magnetic core assembly 41 or disposed in the accommodating space formed by the magnetic core assembly 41.

[0037] Furthermore, the magnetic core assembly 41 includes a first magnetic core 411 and a second magnetic core 412, with the first magnetic core 411 and the second magnetic core 412 arranged opposite to each other to form an accommodating space.

[0038] Furthermore, the first magnetic core 411 includes a first side post 4111, a first middle post 4112, a second middle post 4113, a second side post 4114, and a first transverse post 4115. The first side post 4111, the first middle post 4112, the second middle post 4113, and the second side post 4114 are arranged in parallel in sequence, and the first transverse post 4115 connects the first side post 4111, the first middle post 4112, the second middle post 4113, and the second side post 4114.

[0039] Furthermore, the first magnetic core 411 and the second magnetic core 412 have the same structure. The second magnetic core 412 includes a first side post 4121, a first middle post 4122, a second middle post 4123, a second side post 4124, and a first transverse post 4125. The first side post 4121, the first middle post 4122, the second middle post 4123, and the second side post 4124 are arranged in parallel in sequence. The first transverse post 4125 connects the first side post 4121, the first middle post 4122, the second middle post 4123, and the second side post 4124.

[0040] Further, the winding assembly 42 includes a first winding 421 and a second winding 422. The first winding 421 is wound on the first side post 4111 of the first magnetic core 411 or the first side post 4121 of the second magnetic core 412, and the second winding 422 is wound on the first side post 4111 of the first magnetic core 411 or the first side post 4121 of the second magnetic core 412. The current flowing through the first winding 421 is... i 1. The current flowing through the second winding 422 is i 2. The first winding 421, the second winding 422, the first side post 4111 and the first middle post 4112 of the first magnetic core 411, and the first side post 4121 and the first middle post 4122 of the second magnetic core 412 together constitute the first transformer group, and the current... i 1 and current i The directions of 2 are opposite, resulting in a magnetic flux of φ 1.

[0041] Furthermore, the winding assembly 42 also includes a third winding 423 and a fourth winding 424. The third winding 423 is wound on the second post 4114 of the first magnetic core 411 or the second post 4124 of the second magnetic core 412, and the fourth winding 424 is wound on the second post 4114 of the first magnetic core 411 or the second post 4124 of the second magnetic core 412. The current flowing through the third winding 423 is... i 3. The current flowing through the fourth winding 424 is i 4. The third winding 423, the fourth winding 424, the second side post 4114 and the second middle post 4113 of the first magnetic core 411, and the second side post 4124 and the second middle post 4123 of the second magnetic core 412 together constitute the second transformer group. Current... i 3 and current i The direction of 4 is opposite, and the resulting magnetic flux is φ 2.

[0042] Furthermore, the winding assembly 42 also includes a fifth winding 425 and a sixth winding 426. The fifth winding 425 is disposed in the receiving space formed by the first central column 4112 and the second central column 4113 of the first magnetic core 411 or the first central column 4122 and the second central column 4123 of the second magnetic core 412. The sixth winding 426 is disposed in the receiving space formed by the first central column 4112 and the second central column 4113 of the first magnetic core 411 or the first central column 4122 and the second central column 4123 of the second magnetic core 412. The current flowing through the fifth winding 425 is... i 5. The current flowing through the sixth winding 426 is i 6. The fifth winding 425, the sixth winding 426, the first central column 4112 and the second central column 4113 of the first magnetic core 411, and the first central column 4122 and the second central column 4123 of the second magnetic core 412 constitute a common mode inductor.

[0043] More specifically, there may be an air gap between the first magnetic core 411 and the second magnetic core 412. By adjusting the width of the air gap in the middle column, the inductance of the common mode inductor can be adjusted.

[0044] Compared to Figure 3 In a specific embodiment, the first winding 421, the second winding 422, the third winding 423, the fourth winding 424, the fifth winding 425, and the sixth winding 426 are implemented using printed circuit board (PCB) windings. More specifically, the first side post 4111 of the first magnetic core 411 and the first side post 4121 of the second magnetic core 412 are arranged opposite each other through through holes on the PCB where the first winding 421 and the second winding 422 are located; the second side post 4114 of the first magnetic core 411 and the second side post 4124 of the second magnetic core 412 are arranged opposite each other through through holes on the PCB where the third winding 423 and the fourth winding 424 are located; the PCB where the fifth winding 425 and the sixth winding 426 are located is disposed in the receiving space formed by the first middle post 4112 and the second middle post 4113 of the first magnetic core 411 and the first middle post 4122 and the second middle post 4123 of the second magnetic core 412.

[0045] Optionally, the first winding 421 and the second winding 422 can be disposed on the same printed circuit board or on separate printed circuit boards.

[0046] Optionally, the third winding 423 and the fourth winding 424 can be disposed on the same printed circuit board or on separate printed circuit boards.

[0047] Optionally, the fifth winding 425 and the sixth winding 426 can be disposed on the same printed circuit board or on separate printed circuit boards.

[0048] Optionally, if the first winding 421 and the second winding 422 are disposed on the same printed circuit board, such as... Figure 4 As shown, the first winding 421 and the second winding 422 can be distributed alternately on the copper foil of each layer of the printed circuit board; or the first winding 421 can be distributed on the copper foil of some adjacent layers of the printed circuit board, and the second winding 422 can be distributed on the copper foil of some other adjacent layers of the printed circuit board. This utility model is not limited thereto.

[0049] Optionally, if the third winding 423 and the fourth winding 423 are disposed on the same printed circuit board, such as... Figure 4 As shown, the third winding 423 and the fourth winding 424 can be distributed alternately on the copper foil of each layer of the printed circuit board; or the third winding 423 can be distributed on the copper foil of some adjacent layers of the printed circuit board, and the fourth winding 424 can be distributed on the copper foil of some other adjacent layers of the printed circuit board. This utility model is not limited thereto.

[0050] Optionally, if the fifth winding 425 and the sixth winding 426 are located on the same printed circuit board, such as... Figure 4 As shown, the fifth winding 425 and the sixth winding 426 can be distributed alternately on the copper foil of each layer of the printed circuit board; or the fifth winding 425 can be distributed on the copper foil of some adjacent layers of the printed circuit board, and the sixth winding 426 can be distributed on the copper foil of some other adjacent layers of the printed circuit board. This utility model is not limited thereto.

[0051] Compared to Figure 1 The transformer 1 in this specific embodiment, and the transformer 4 provided, can still realize two sets of discrete transformers and a common-mode inductor; and the magnetic flux generated by the first winding 421, the second winding 422, the third winding 423, and the fourth winding 424 will not pass through the fifth winding 425 and the sixth winding 426, and will not interfere with each other, thus not affecting the working performance of the circuit. This can significantly reduce the volume occupied by the magnetic core, while improving electromagnetic performance, thereby further increasing the power density of the power supply. Compared to... Figure 3 Specific embodiments, Figure 4 The specific implementation uses printed circuit board (PCB) windings, which can reduce the size of the windings and further improve the power density of the power supply.

[0052] Figure 5 This is a schematic diagram of a third specific embodiment of a transformer with an integrated common-mode inductor according to the present invention. Figure 5 As shown, the transformer 5 provided in this embodiment includes a magnetic core assembly 51 and a winding assembly 52. ​​The winding assembly 52 is wound on the magnetic core assembly 51 or disposed in the accommodating space formed by the magnetic core assembly 51.

[0053] Furthermore, the magnetic core assembly 51 includes a first magnetic core 511 and a second magnetic core 512, with the first magnetic core 511 and the second magnetic core 512 arranged opposite to each other to form an accommodating space.

[0054] Furthermore, the first magnetic core 511 includes a first side post 5111, a first middle post 5112, a second middle post 5113, a second side post 5114, and a first transverse post 5115. The first side post 5111, the first middle post 5112, the second middle post 5113, and the second side post 5114 are arranged in parallel in sequence, and the first transverse post 5115 connects the first side post 5111, the first middle post 5112, the second middle post 5113, and the second side post 5114.

[0055] Furthermore, the first magnetic core 511 and the second magnetic core 512 have the same structure. The second magnetic core 512 includes a first side post 5121, a first middle post 5122, a second middle post 5123, a second side post 5124, and a first horizontal post 5125. The first side post 5121, the first middle post 5122, the second middle post 5123, and the second side post 5124 are arranged in parallel in sequence. The first horizontal post 5125 connects the first side post 5121, the first middle post 5122, the second middle post 5123, and the second side post 5124.

[0056] Further, the winding assembly 52 includes a first winding 521 and a second winding 522. The first winding 521 is wound on the first central post 5112 and the second central post 5113 of the first magnetic core 511 or the first central post 5122 and the second central post 5123 of the second magnetic core 512. The second winding 522 is wound on the first central post 5112 and the second central post 5113 of the first magnetic core 511 or the first central post 5122 and the second central post 5123 of the second magnetic core 512. The current flowing through the first winding 521 is... i 1. The current flowing through the second winding 522 is i 2. The first winding 521, the second winding 522, the first magnetic core 511, and the second magnetic core 512 together constitute a transformer, and the current... i 1 and current i The directions of 2 are opposite, resulting in a magnetic flux of φ .

[0057] Furthermore, the winding assembly 52 also includes a fifth winding 525 and a sixth winding 526, which are disposed in the receiving space formed by the first central post 5112 and the second central post 5113 of the first magnetic core 511 or the first central post 5122 and the second central post 5123 of the second magnetic core 512, and are located on the same side of the first winding 521 and the second winding 522. Figure 5 As shown, the fifth winding 525 and the sixth winding 526 are located above the first winding 521 and the second winding 522. The current flowing through the fifth winding 525 is...i 5. The current flowing through the sixth winding 526 is i 6. The fifth winding 525, the sixth winding 526, the first magnetic core 511, and the second magnetic core 512 constitute a common-mode inductor.

[0058] More specifically, there may be an air gap between the first magnetic core 511 and the second magnetic core 512. By adjusting the width of the air gap in the middle column, the inductance of the common mode inductor can be adjusted.

[0059] Compared to Figure 2 The transformer 2 and the transformer 5 provided in this specific embodiment can still realize a set of discrete transformers and a common-mode inductor. The fifth winding 525 and the sixth winding 526 are adjacent layers and arranged on the same side of the first winding 521 and the second winding 522. Because the fifth winding 525 and the sixth winding 526 are adjacent and the current directions are opposite, they will not affect the magnetomotive force (MMF) distribution of the first winding 521 and the second winding 522, thus realizing a common-mode inductor without affecting the operating state of the transformer. At the same time, the volume occupied by the magnetic core can be significantly reduced, the electromagnetic performance can be improved, thereby further improving the power density of the power supply.

[0060] Figure 6 This is a schematic diagram of a fourth specific embodiment of a transformer with integrated common-mode inductor according to the present invention. Figure 6 Compared to Figure 5 The difference is that the fifth winding 625 and the sixth winding 626 are located in the accommodating space formed by the first central column 6112 and the second central column 6113 of the first magnetic core 611 or the first central column 6122 and the second central column 6123 of the second magnetic core 612, and are located below the first winding 521 and the second winding 622.

[0061] Figure 7 This is a structural schematic diagram of a fifth specific embodiment of a transformer with an integrated common-mode inductor according to this utility model. Figure 7 As shown, the transformer 7 provided in this embodiment includes a magnetic core assembly 71 and a winding assembly 72. The winding assembly 72 is wound on the magnetic core assembly 71 or disposed in the accommodating space formed by the magnetic core assembly 71.

[0062] Furthermore, the magnetic core assembly 71 includes a first magnetic core 711 and a second magnetic core 712, with the first magnetic core 711 and the second magnetic core 712 arranged opposite to each other to form an accommodating space.

[0063] Furthermore, the first magnetic core 711 includes a first side post 7111, a first middle post 7112, a second middle post 7113, a second side post 7114, and a first transverse post 7115. The first side post 7111, the first middle post 7112, the second middle post 7113, and the second side post 7114 are arranged in parallel in sequence, and the first transverse post 7115 connects the first side post 7111, the first middle post 7112, the second middle post 7113, and the second side post 7114.

[0064] Furthermore, the first magnetic core 711 and the second magnetic core 712 have the same structure. The second magnetic core 712 includes a first side post 7121, a first middle post 7122, a second middle post 7123, a second side post 7124, and a first horizontal post 7125. The first side post 7121, the first middle post 7122, the second middle post 7123, and the second side post 7124 are arranged in parallel in sequence. The first horizontal post 7125 connects the first side post 7121, the first middle post 7122, the second middle post 7123, and the second side post 7124.

[0065] Further, the winding assembly 72 includes a first winding 721 and a second winding 722. The first winding 721 is wound on the first central post 7112 and the second central post 7113 of the first magnetic core 711 or the first central post 7122 and the second central post 7123 of the second magnetic core 712. The second winding 722 is wound on the first central post 7112 and the second central post 7113 of the first magnetic core 711 or the first central post 7122 and the second central post 7123 of the second magnetic core 712. The current flowing through the first winding 721 is... i 1. The current flowing through the second winding 722 is i 2. The first winding 721, the second winding 722, the first magnetic core 711, and the second magnetic core 712 together constitute a transformer, and the current... i 1 and current i The directions of 2 are opposite, resulting in a magnetic flux of φ .

[0066] Furthermore, the winding assembly 72 also includes a fifth winding 725 and a sixth winding 726. The fifth winding 725 and the sixth winding 726 are jointly disposed within the receiving space formed by the first central post 7112 and the second central post 7113 of the first magnetic core 711, or the first central post 7122 and the second central post 7123 of the second magnetic core 712, and are located on the same side of the first winding 721 and the second winding 722. The current flowing through the fifth winding 725 is... i 5. The current flowing through the sixth winding 726 is i 6. The fifth winding 725, the sixth winding 726, the first central column 7112 of the first magnetic core 711 and the second central column 7113 or the first central column 7122 and the second central column 7123 of the second magnetic core 712 constitute a common mode inductor.

[0067] More specifically, there may be an air gap between the first magnetic core 711 and the second magnetic core 712. By adjusting the width of the air gap in the middle column, the inductance of the common mode inductor can be adjusted.

[0068] Compared to Figure 5 In a specific embodiment, the first winding 721, the second winding 722, the fifth winding 725, and the sixth winding 726 are implemented using printed circuit board (PCB) windings. More specifically, the first center post 7112 and the second center post 7113 of the first magnetic core 711 are disposed opposite to the first center post 7122 and the second center post 7123 of the second magnetic core 712 through through holes on the PCB where the first winding 721 and the second winding 722 are located; the PCB where the fifth winding 725 and the sixth winding 726 are located is disposed in the receiving space formed by the first center post 7112 and the second center post 7113 of the first magnetic core 711 or the first center post 7122 and the second center post 7123 of the second magnetic core 712.

[0069] Optionally, the first winding 721 and the second winding 722 can be disposed on the same printed circuit board or on separate printed circuit boards.

[0070] Optionally, the fifth winding 725 and the sixth winding 726 can be disposed on the same printed circuit board or on separate printed circuit boards.

[0071] Optionally, if the first winding 721 and the second winding 722 are disposed on the same printed circuit board, such as... Figure 7 As shown, the first winding 721 and the second winding 722 can be distributed alternately on the copper foil of each layer of the printed circuit board; or the first winding 721 can be distributed on the copper foil of some adjacent layers of the printed circuit board, and the second winding 722 can be distributed on the copper foil of some other adjacent layers of the printed circuit board. This utility model is not limited thereto.

[0072] Optionally, if the fifth winding 725 and the sixth winding 726 are located on the same printed circuit board, such as... Figure 7 As shown, the fifth winding 725 and the sixth winding 726 can be distributed alternately on the copper foil of each layer of the printed circuit board; or the fifth winding 725 can be distributed on the copper foil of some adjacent layers of the printed circuit board, and the sixth winding 726 can be distributed on the copper foil of some other adjacent layers of the printed circuit board. This utility model is not limited thereto.

[0073] Compared to Figure 2The transformer 2 in this specific embodiment, and the transformer 7, can still realize a set of discrete transformers and a common-mode inductor; the fifth winding 725 and the sixth winding 726 are adjacent layers and arranged on the same side of the first winding 721 and the second winding 722. Because the fifth winding 525 and the sixth winding 526 are adjacent and the current directions are opposite, they will not affect the magnetomotive force (MMF) distribution of the first winding 721 and the second winding 722, thus realizing a common-mode inductor without affecting the operating state of the transformer. At the same time, the volume occupied by the magnetic core can be significantly reduced, the electromagnetic performance can be improved, thereby achieving a further increase in power density. Compared to Figure 5 and Figure 6 Specific embodiments, Figure 7 The specific implementation uses printed circuit board (PCB) windings, which can reduce the size of the windings and further improve the power density of the power supply.

[0074] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements 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 appended claims.

Claims

1. A transformer with integrated common-mode inductor, characterized in that, The device includes a magnetic core assembly and a winding assembly. The winding assembly is wound on the magnetic core assembly or disposed within a receiving space formed by the magnetic core assembly. The magnetic core assembly includes a first magnetic core and a second magnetic core, which are disposed opposite to each other. Each of the first magnetic core and the second magnetic core includes a first side post, a first middle post, a second middle post, a second side post, and a first transverse post. The first side post, the first middle post, the second middle post, and the second side post are arranged in parallel in sequence. The first transverse post connects the first side post, the first middle post, the second middle post, and the second side post.

2. The transformer with integrated common-mode inductor as described in claim 1, characterized in that, The winding assembly includes a first winding and a second winding, wherein the first winding and the second winding are wound on the first side post of the first magnetic core or the first side post of the second magnetic core.

3. A transformer with an integrated common-mode inductor as described in claim 2, characterized in that, The winding assembly further includes a third winding and a fourth winding, wherein the third winding and the fourth winding are wound on the second side post of the first magnetic core or the second side post of the second magnetic core.

4. A transformer with an integrated common-mode inductor as described in claim 3, characterized in that, The winding assembly further includes a fifth winding and a sixth winding, wherein the fifth winding and the sixth winding are disposed in the receiving space formed by the first and second central columns of the first magnetic core or the first and second central columns of the second magnetic core.

5. A transformer with an integrated common-mode inductor as described in claim 4, characterized in that, The first winding, the second winding, the third winding, the fourth winding, the fifth winding, and the sixth winding are implemented using printed circuit board windings.

6. A transformer with an integrated common-mode inductor as described in claim 5, characterized in that, The first side post of the first magnetic core and the first side post of the second magnetic core are disposed opposite each other through through holes on the printed circuit board where the first winding and the second winding are located; the second side post of the first magnetic core and the second side post of the second magnetic core are disposed opposite each other through through holes on the printed circuit board where the third winding and the fourth winding are located; the printed circuit board where the fifth winding and the sixth winding are located is disposed in the receiving space formed by the first and second central posts of the first magnetic core and the first and second central posts of the second magnetic core.

7. A transformer with an integrated common-mode inductor as described in claim 1, characterized in that, The winding assembly includes a first winding and a second winding, wherein the first winding and the second winding are wound on the first and second central columns of the first magnetic core or the first and second central columns of the second magnetic core.

8. A transformer with an integrated common-mode inductor as described in claim 7, characterized in that, The winding assembly further includes a fifth winding and a sixth winding, which are disposed in the receiving space formed by the first and second central columns of the first magnetic core or the first and second central columns of the second magnetic core, and are located on the same side of the first winding and the second winding.

9. A transformer with an integrated common-mode inductor as described in claim 8, characterized in that, The first winding, the second winding, the fifth winding, and the sixth winding are implemented using printed circuit board windings.

10. A transformer with an integrated common-mode inductor as described in claim 9, characterized in that, The first and second central pillars of the first magnetic core and the first and second central pillars of the second magnetic core are arranged opposite each other through through holes on the printed circuit board where the first winding and the second winding are located; the printed circuit board where the fifth and sixth windings are located is located in the accommodating space formed by the first and second central pillars of the first magnetic core or the first and second central pillars of the second magnetic core.

Images