CN219303462U

CN219303462U - Interleaved LLC transformer

Info

Publication number: CN219303462U
Application number: CN202223202892.2U
Authority: CN
Inventors: 曹坤; 沈利峰; 李�学
Original assignee: Haining Lianfeng Dongjin Electronics Co ltd
Current assignee: Haining Lianfeng Dongjin Electronics Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-07-04
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses an interleaved LLC transformer, which comprises a magnetic core and a framework, wherein the magnetic core comprises a first magnetic core piece and a second magnetic core piece, and the framework comprises a primary winding framework and a secondary winding framework; the primary winding framework comprises a first primary vertical plate, a first primary winding part, a primary framework main body, a second primary winding part and a second primary vertical plate which are sequentially connected, and a first PIN terminal is arranged at the bottom of the primary framework main body; the secondary winding skeleton comprises a first secondary riser, a first secondary winding part, a secondary skeleton main body, a second secondary winding part and a second secondary riser which are sequentially connected, and second PIN terminals are arranged at the bottoms of the secondary skeleton main body, the first secondary riser and the second secondary riser. The interleaved LLC transformer reduces the edge magnetic flux through the primary winding framework and the secondary winding framework which are interleaved, has better shielding and electromagnetic interference resisting effects, and simultaneously, an H-shaped magnetic sheet is added between the primary and the secondary to shield the induction magnetic field of the transformer for improving the benefit.

Description

Interleaved LLC transformer

Technical Field

The utility model relates to the technical field of LLC transformers, in particular to an interleaved LLC transformer.

Background

Currently, the edge magnetic flux of the existing LLC transformer is large, and strong electromagnetic interference exists.

Based on the above situation, the present utility model proposes an interleaved LLC transformer, which can effectively solve one or more of the above problems.

Disclosure of Invention

The utility model aims to provide an interleaved LLC transformer. The staggered LLC transformer has simple structure and convenient use, reduces the edge magnetic flux through the staggered primary winding framework and the secondary winding framework, has better shielding and electromagnetic interference resisting effects, and simultaneously, in order to improve the benefit, makes up the cutting of magnetic lines between the primary and the secondary, adds an H-shaped manganese-zinc ferrite magnetic sheet between the primary and the secondary, and shields the induction magnetic field of the magnetic sheet.

The utility model is realized by the following technical scheme:

an interleaved LLC transformer comprising a core comprising a first core piece and a second core piece, and a bobbin comprising a primary winding bobbin and a secondary winding bobbin;

the primary winding framework comprises a first primary vertical plate, a first primary winding part, a primary framework main body, a second primary winding part and a second primary vertical plate which are sequentially connected, and a first PIN terminal is arranged at the bottom of the primary framework main body;

the secondary winding framework comprises a first secondary vertical plate, a first secondary winding part, a secondary framework main body, a second secondary winding part and a second secondary vertical plate which are sequentially connected, and second PIN terminals are arranged at the bottoms of the secondary framework main body, the first secondary vertical plate and the second secondary vertical plate;

the secondary winding framework is sleeved outside the primary winding framework, the first magnetic core piece is sleeved outside the secondary winding framework, and second magnetic core pieces are arranged in the first secondary winding part and the second secondary winding part.

Preferably, a shielding magnetic sheet is arranged between the primary framework main body and the secondary framework main body.

Preferably, the shielding magnetic sheet is H-shaped.

Preferably, the first magnetic core piece is in a Chinese character 'ri'.

Preferably, limiting plates are arranged at the tops of the first primary vertical plate and the second primary vertical plate.

Compared with the prior art, the utility model has the following advantages:

the staggered LLC transformer has simple structure and convenient use, reduces the edge magnetic flux through the staggered primary winding framework and the secondary winding framework, has better shielding and electromagnetic interference resisting effects, and simultaneously, in order to improve the benefit, makes up the cutting of magnetic lines between the primary and the secondary, adds an H-shaped manganese-zinc ferrite magnetic sheet between the primary and the secondary, and shields the induction magnetic field of the magnetic sheet.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of another view of the present utility model;

FIG. 3 is a schematic illustration of the structure of the present utility model (with the first core piece hidden);

FIG. 4 is a schematic view of the primary winding former of the present utility model;

FIG. 5 is a schematic view of a secondary winding former according to the present utility model;

FIG. 6 is a schematic view of a secondary winding former according to another aspect of the present utility model;

FIG. 7 is a schematic view of a first magnetic core piece according to the present utility model;

fig. 8 is a schematic structural view of the shielding magnetic sheet according to the present utility model.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present utility model, preferred embodiments of the present utility model will be described below with reference to specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

Example 1:

as shown in fig. 1 to 8, the present utility model provides an interleaved LLC transformer comprising a core comprising a first core piece 1 and a second core piece 2, and a bobbin comprising a primary winding bobbin 3 and a secondary winding bobbin 4;

the primary winding framework 3 comprises a first primary vertical plate 31, a first primary winding part 32, a primary framework main body 33, a second primary winding part 34 and a second primary vertical plate 35 which are sequentially connected, and a first PIN terminal 331 is arranged at the bottom of the primary framework main body 33;

the secondary winding framework 4 comprises a first secondary vertical plate 41, a first secondary winding part 42, a secondary framework main body 43, a second secondary winding part 44 and a second secondary vertical plate 45 which are sequentially connected, and second PIN terminals 451 are arranged at the bottoms of the secondary framework main body 43, the first secondary vertical plate 41 and the second secondary vertical plate 45;

the secondary winding framework 4 is sleeved outside the primary winding framework 3, the first magnetic core piece 1 is sleeved outside the secondary winding framework 4, and the second magnetic core piece 2 is arranged in the first secondary winding part 42 and the second secondary winding part 44.

Example 2:

the primary winding framework 3 comprises a first primary vertical plate 31, a first primary winding part 32, a primary framework main body 33, a second primary winding part 34 and a second primary vertical plate 35 which are sequentially connected, and a first PIN terminal 331 is arranged at the bottom of the primary framework main body 33; the first primary winding portion 32 and the second primary winding portion 34 are for winding the primary coil;

the secondary winding framework 4 comprises a first secondary vertical plate 41, a first secondary winding part 42, a secondary framework main body 43, a second secondary winding part 44 and a second secondary vertical plate 45 which are sequentially connected, and second PIN terminals 451 are arranged at the bottoms of the secondary framework main body 43, the first secondary vertical plate 41 and the second secondary vertical plate 45; the first secondary winding portion 42 and the second secondary winding portion 44 are for winding a secondary coil;

The winding structure of the utility model is formed by winding in a staggered manner in two winding windows, so that the voltage of the whole transformer is more stable during light load or heavy load on-machine verification test, and the staggered structure design is used, thereby having low EMI pulse width debugging. When the circuit is used for switching, the power can be larger, and meanwhile, the working efficiency of the circuit is more stable.

Further, in another embodiment, a shielding magnetic sheet 5 is provided between the primary skeleton body 33 and the secondary skeleton body 43.

Further, in another embodiment, the shielding magnetic sheet 5 has an H shape.

In order to improve the benefit, the cutting of magnetic lines between the primary and the secondary is made up, an H-shaped Mn-Zn ferrite magnetic sheet is added between the primary and the secondary, and the induction magnetic field is shielded.

Further, in another embodiment, the first magnetic core piece 1 has a zigzag shape.

The first magnetic core piece 1 adopts the outer frame of the shape of the Chinese character 'ri', and is matched with the second magnetic core piece 2 to form a better magnetic circuit, so that the edge magnetic flux is reduced, and the two magnetic core pieces are combined to better inhibit the eddy current loss of the coil.

Further, in another embodiment, the top of each of the first primary riser 31 and the second primary riser 35 is provided with a limiting plate 311.

The limiting plate 311 is arranged to facilitate the matching installation of the primary winding framework 3 and the secondary winding framework 4.

The interleaved LLC transformers of the present utility model can be readily manufactured and used by those skilled in the art, and can produce the positive effects described herein, in light of the description and drawings of the present utility model.

Unless specifically stated otherwise, in the present utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the positional relationship indicated is based on the positional relationship indicated in the drawings, and is merely for convenience of describing the present utility model and simplifying the description, and it is not necessary to indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationship in the present utility model are merely for exemplary illustration and should not be construed as limitations of the present patent, and it is possible for those skilled in the art to understand the specific meaning of the above terms in conjunction with the drawings and according to the specific circumstances.

Unless specifically stated or limited otherwise, the terms "disposed," "connected," and "connected" herein are to be construed broadly, e.g., they may be fixed, removable, or integral; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present utility model fall within the scope of the present utility model.

Claims

1. An interleaved LLC transformer, characterized in that: the magnetic core comprises a first magnetic core piece and a second magnetic core piece, and the skeleton comprises a primary winding skeleton and a secondary winding skeleton;

2. An interleaved LLC transformer according to claim 1 wherein: and shielding magnetic sheets are arranged between the primary framework main body and the secondary framework main body.

3. An interleaved LLC transformer according to claim 2 wherein: the shielding magnetic sheet is H-shaped.

4. An interleaved LLC transformer according to claim 1 wherein: the first magnetic core piece is in a Chinese character 'ri' shape.

5. An interleaved LLC transformer according to claim 1 wherein: limiting plates are arranged at the tops of the first primary vertical plate and the second primary vertical plate.