High coupling structure of single-path transformer

Abstract

The utility model discloses a high-coupling structure of a single-path transformer, which belongs to the technical field of power electronics and is characterized in that primary windings and secondary windings of the transformer are wound by enameled wires or Litz wires in a layered manner, and in each layer, the primary windings and the secondary windings are respectively wound on a magnetic core; a primary winding wire coil and a secondary winding wire coil which are formed after coiling are closely adjacent to each other up and down; one or more copper ring sheets are arranged between the layers; the primary windings between the adjacent layers adopt a parallel structure, the secondary windings between the adjacent layers adopt a parallel structure, and the primary windings and the secondary windings between the adjacent layers are alternately stacked. Compared with the prior art, the primary and the secondary are crossed and stacked in the scheme, so that not only can full coupling be realized, but also the peripheral size can be remarkably reduced. In addition, the copper ring sheets are smaller in size and occupied space, so that the transformer is more compact, the primary and secondary coupling degree is improved, the copper strips have better heat dissipation performance, the secondary temperature rise of the transformer can be effectively reduced, and the transformer is very suitable for a narrow space.

Description

Technical Field

[0001] This utility model belongs to the field of power electronics technology, and in particular relates to a high coupling structure for a single-circuit transformer. Background Technology

[0002] Due to environmental limitations such as size, space, and heat dissipation, medium- and high-power power conversion processes require thicker enameled wire diameters and occupy more space, resulting in a correspondingly larger transformer core volume, which may not be feasible in limited spaces. Furthermore, in the current design of transformers for medium- and high-power DC regulated power supplies, the traditional winding methods for the primary and secondary windings still have the following key problems:

[0003] 1) Insufficient coupling and energy loss: In traditional transformers, the primary winding is completed before the secondary winding. This sequential structure results in low electromagnetic coupling efficiency between the primary and secondary windings. Due to the grouped and cross-arranged windings, leakage inductance is significantly increased, leading to substantial energy loss during transmission.

[0004] 2) Size and space limitations: Medium and high power supplies have high requirements for winding wire diameter. Traditional enameled wire or Litz wire winding requires a large core window area, resulting in a large overall transformer size.

[0005] 3) Insufficient heat dissipation: In traditional winding methods, heat is concentrated inside the secondary winding, with a single heat dissipation path, mainly relying on passive conduction through the magnetic core or external heat dissipation structures. Especially under high-load scenarios, the dense winding of copper strip or enameled wire can easily form local hot spots, leading to excessive temperature rise and affecting system reliability and lifespan. In addition, the insulation materials of traditional windings have limited temperature resistance, which can easily cause insulation aging or even short circuit risks under high-temperature environments.

[0006] How to design a high-coupling structure for a single-circuit transformer to solve the above-mentioned technical problems has long been a challenge for technicians in this field. Utility Model Content

[0007] To address the aforementioned technical problems, this utility model provides a high-coupling structure for a single-circuit transformer, solving the problems through the following technical means:

[0008] A high-coupling structure for a single-circuit transformer is characterized in that the primary and secondary windings of the transformer are wound in layers using enameled wire or Litz wire, wherein: in each layer, the primary and secondary windings are wound with magnetic cores, and the primary winding coils and secondary winding coils formed after winding are adjacent to each other at the bottom and top; one or more copper rings are provided between layers; the primary windings between adjacent layers are connected in parallel, and the secondary windings between adjacent layers are connected in parallel; the primary and secondary windings between adjacent layers are alternately stacked.

[0009] Preferably, the magnetic core is mounted on the circuit board by being encased in a positioning shell.

[0010] Preferably, the ends of the copper rings extend outward to form two independent connecting ears, and the connecting ears are provided with connecting holes for inserting connecting posts. In this case, multiple copper rings stacked on each other in each layer are connected end to end through connecting posts and connecting holes to form a series structure; the series structure between layers is further connected into a parallel structure through connecting posts.

[0011] Preferably, the bottom of the connecting pillars on the left and right sides is connected to the circuit board.

[0012] Preferably, the primary and secondary windings of the transformer are wound in four layers using enameled wire or Litz wire. Each layer contains a primary winding coil and a secondary winding coil that are closely adjacent to each other. Three or four copper rings are provided between the layers, and four connecting posts are respectively inserted into four sets of coaxial connecting holes.

[0013] Preferably, the device also includes an isolation seat and a cover for installing the transformer, wherein: the isolation seat has a circular cavity inside, and multiple positioning supports are symmetrically arranged on the outer side of the isolation seat, with positioning holes for positioning on the positioning supports, and heat dissipation fins are evenly arranged on the outer wall of the isolation seat; the top of the cover has multiple heat dissipation holes symmetrically arranged, the edge of the cover has multiple positioning ears for installing connecting screws, and the two sides of the cover have positioning slots for positioning with the internal boss of the isolation seat.

[0014] The single-channel transformer high-coupling structure of this utility model has the following beneficial effects:

[0015] 1) In this structure, the primary winding of the transformer is made of enameled wire or Litz wire, and the layers are wound in parallel; the secondary winding is made of through-band forming and then layered in parallel; during the assembly process, the primary and secondary windings are cross-stacked to achieve full coupling.

[0016] 2) This structure uses a continuous strip for secondary winding, reducing space requirements. Because the copper strip is smaller and occupies less space, the transformer is more compact. While improving the coupling between the primary and secondary windings, the copper strip has better heat dissipation, which can effectively reduce the temperature rise of the transformer secondary winding. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a side view of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the installation of the connecting column of this utility model;

[0020] Figure 3 This is a schematic diagram of the copper ring plate installation of this utility model;

[0021] Figure 4 This is a schematic diagram of the installation of the isolation seat and cover of this utility model;

[0022] Figure 5 This is a schematic diagram of the cover structure of this utility model.

[0023] Among them, 1-primary winding, 2-secondary winding, 3-magnetic core, 4-positioning shell, 5-circuit board, 6-copper ring, 601-connecting ear, 602-connecting hole, 7-connecting post, 8-isolation seat, 801-positioning support, 802-positioning hole, 803-heat dissipation fins, 9-cover, 901-heat dissipation hole, 902-positioning ear, 903-positioning slot. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] The present invention will now be described in detail with reference to the accompanying drawings.

[0026] like Figures 1 to 3 As shown, in this high-coupling structure of a single-circuit transformer, the primary winding 1 and the secondary winding 2 of the transformer are wound in layers using enameled wire or Litz wire. In each layer, the primary winding 1 and the secondary winding 2 are respectively wound around a magnetic core 3, and the primary winding coils and the secondary winding coils formed after winding are adjacent to each other at the bottom and top. One or more copper rings 6 are provided between the layers. The primary windings 1 between adjacent layers adopt a parallel structure, and the secondary windings 2 between adjacent layers adopt a parallel structure. The primary windings 1 and the secondary windings 2 between adjacent layers are alternately stacked.

[0027] In this embodiment, the primary winding of the transformer is made of enameled wire or Litz wire, and the layers are wound in parallel; the secondary winding is made of through-strip wire and then layered in parallel; during the assembly process, the primary and secondary windings are cross-stacked to achieve full coupling.

[0028] In the figure, the magnetic core 3 is mounted on the circuit board 5 by being encased in a positioning shell 4.

[0029] In the figure, the ends of the copper ring pieces 6 extend outward to form two independent connecting ears 601. Connecting ears 601 are provided with connecting holes 602 for inserting connecting posts 7. Multiple copper ring pieces 6 stacked in each layer are connected end-to-end through connecting posts 7 and connecting holes 602 to form a series structure. The series structure between layers is further connected in parallel through connecting posts 7. Furthermore, the bottoms of the connecting posts 7 on the left and right sides are connected to circuit boards 5.

[0030] In this embodiment, a pass-through strip is used for secondary winding to reduce space requirements. Because the copper strip is smaller in volume and occupies less space, the transformer is more compact. While improving the coupling between the primary and secondary windings, the copper strip has better heat dissipation, which can effectively reduce the temperature rise of the transformer secondary winding.

[0031] In practical implementation, the primary winding 1 and secondary winding 2 of the transformer are wound in four layers using enameled wire or Litz wire. Each layer contains a primary winding coil and a secondary winding coil that are adjacent to each other. Three or four copper rings 6 are set between the layers, and four connecting posts 7 are respectively inserted into four sets of coaxial connecting holes 602, as detailed below. Figure 3 As shown, the connecting ears 601 of the three copper ring pieces 6 are in different positions. The connecting ear 601 on the right side of the top copper ring piece 6 is in the same position as the connecting ear 601 on the left side of the middle copper ring piece 6. The connecting ear 601 on the right side of the middle copper ring piece 6 is in the same position as the connecting ear 601 on the left side of the bottom copper ring piece 6. The connecting ears 601 in the same position after stacking are connected by the connecting post 7 and the connecting hole 602.

[0032] like Figures 4 to 5 As shown, it also includes an isolation seat 8 and a cover 9 for installing the transformer. The isolation seat 8 has a circular cavity inside. Multiple positioning supports 801 are symmetrically arranged on the outer side of the isolation seat 8. Positioning holes 802 are opened on the positioning supports 801 for positioning. Heat dissipation fins 803 are evenly arranged on the outer wall of the isolation seat 8. Multiple heat dissipation holes 901 are symmetrically arranged on the top of the cover 9. Multiple positioning ears 902 for installing connecting screws are provided on the edge of the cover 9. Positioning slots 903 for positioning with the internal boss of the isolation seat 8 are provided on both sides of the cover 9.

[0033] It should be noted that the isolation seat 8 and the cover 9 adopt a detachable structure and are made of heat-dissipating metal. The heat dissipation fins 803 and heat dissipation holes 901 on the shell can accelerate heat dissipation. The structure also has a certain shielding effect, which can prevent the transformer's induced signal from interfering with other external components.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-coupling structure for a single-circuit transformer, characterized in that, The primary winding (1) and secondary winding (2) of the transformer are wound in layers using enameled wire or Litz wire, wherein: In each layer, the primary winding (1) and the secondary winding (2) are coiled around the magnetic core (3), and the primary winding coil and the secondary winding coil formed after coiling are closely adjacent to each other at the bottom and top. One or more copper rings (6) are provided between the layers. The primary windings (1) between adjacent layers are connected in parallel, and the secondary windings (2) between adjacent layers are connected in parallel. The primary winding (1) and secondary winding (2) of adjacent layers are stacked alternately.

2. The high-coupling structure of a single-circuit transformer according to claim 1, characterized in that, The magnetic core (3) is mounted on the circuit board (5) by being encased in a positioning shell (4).

3. The single-circuit transformer high-coupling structure according to claim 1, characterized in that, The copper ring (6) extends outward at its end to form two independent connecting ears (601). The connecting ears (601) are provided with connecting holes (602), which are used to insert connecting posts (7), wherein: Multiple copper rings (6) stacked on each other in each layer are connected end to end through connecting posts (7) and connecting holes (602) to form a series structure; The series structure between layers is further connected to form a parallel structure through connecting columns (7).

4. The single-circuit transformer high-coupling structure according to claim 3, characterized in that, The bottom of the connecting pillars (7) on the left and right sides is connected to the circuit board (5).

5. The high-coupling structure of a single-circuit transformer according to claim 1, characterized in that, The primary winding (1) and secondary winding (2) of the transformer are wound in four layers using enameled wire or Litz wire. Each layer contains a primary winding coil and a secondary winding coil that are closely adjacent to each other. Three or four copper rings (6) are provided between the layers. Four connecting posts (7) are inserted into four sets of coaxial connecting holes (602).

6. The high-coupling structure of a single-circuit transformer according to claim 1, characterized in that, It also includes an isolation seat (8) and a cover (9) for installing the transformer, wherein: The isolation seat (8) has a circular cavity inside, and multiple positioning supports (801) are symmetrically arranged on the outer side of the isolation seat (8). Positioning holes (802) for positioning are opened on the positioning supports (801), and heat dissipation fins (803) are evenly arranged on the outer wall of the isolation seat (8). The top of the cover (9) is symmetrically provided with multiple heat dissipation holes (901), the edge of the cover (9) is provided with multiple positioning ears (902) for installing connecting screws, and the two sides of the cover (9) are provided with positioning slots (903) for positioning with the internal boss of the isolation seat (8).

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