CN-224203935-U - LLC magnetic integration integrated transformer

CN224203935UCN 224203935 UCN224203935 UCN 224203935UCN-224203935-U

Abstract

The utility model discloses an LLC magnetic integration integrated transformer, which aims to improve integration level, performance and reliability. The transformer comprises a winding bracket, an upper magnetic core and a lower magnetic core which are symmetrically arranged, and a placement magnetic core which is fixed in a through hole of the winding bracket. The through hole is divided into a first accommodating groove and a second accommodating groove, the placed magnetic core is arranged in the first accommodating groove, and the side convex columns of the upper magnetic core and the lower magnetic core are arranged in the second accommodating groove. And a first air gap and a second air gap are respectively arranged between the placed magnetic core and the side protruding columns and between the side protruding columns and are used for adjusting magnetic resistance and optimizing performance.

Inventors

LIU SHAOQIAN
WANG LINGYUN

Assignees

广东贺东变压器有限公司

Dates

Publication Date: 20260505
Application Date: 20250710

Claims (9)

1. The LLC magnetic integration integrated transformer is characterized by comprising a winding support, an upper magnetic core, a lower magnetic core and a placed magnetic core, wherein the upper magnetic core and the lower magnetic core are symmetrically arranged on the upper side and the lower side of the winding support, one end of the winding support is provided with a through hole, the through hole comprises a first accommodating groove and a second accommodating groove, the first accommodating groove is located at the outermost side, the placed magnetic core is fixedly arranged in the first accommodating groove, side protruding columns are arranged at the same ends of the upper magnetic core and the lower magnetic core, the side protruding columns are arranged in the second accommodating groove, a first air gap is arranged between the placed magnetic core and the side protruding columns, and a second air gap is arranged between the side protruding columns of the upper magnetic core and the lower magnetic core.
2. The LLC magnetic integrated transformer of claim 1, wherein the side surfaces of the two ends of the winding bracket are provided with protruding portions, the protruding portions are provided with pins, the bottom surface of one protruding portion of the winding bracket is provided with a conductive adhesive groove, conductive adhesive is arranged in the conductive adhesive groove, and the conductive adhesive electrically connects the pins in the conductive adhesive groove with the lower magnetic core.
3. The LLC magnetically integrated transformer of claim 2, wherein a wire-laying slot is provided between the bosses at one end of the winding bracket.
4. The LLC magnetically integrated transformer of claim 1 wherein a winding slot is provided in a central location of the winding support.
5. The LLC magnetic integrated transformer of claim 1 wherein V-shaped protrusions are provided on the top and bottom of the end of the winding support opposite the through hole, and V-shaped grooves cooperating with the V-shaped protrusions are provided on the upper and lower cores.
6. The LLC magnetic integrated transformer of claim 1, wherein the placed core is disposed in the first accommodating groove in an inserting manner from top to bottom, and two sides of the upper end of the placed core are provided with limit protrusions, and the limit protrusions are disposed at the top of the bobbin.
7. The LLC magnetically integrated transformer of claim 1 wherein the width of the core is greater than the width of the side studs, both widths being measured in the left and right directions of the bobbin.
8. The LLC magnetic integrated transformer of claim 1, wherein the upper and lower magnetic cores are identical in structure, a central boss is provided in the middle of the upper magnetic core, support bosses are provided on both sides of the upper magnetic core, the central bosses are in abutting connection after penetrating through the winding bracket, and the support bosses are in abutting connection on both sides of the winding bracket respectively.
9. The LLC magnetically integrated transformer of claim 2, wherein the pins are gull-legs, L-legs, or straight pins.

Description

LLC magnetic integration integrated transformer Technical Field The utility model relates to the technical field of transformers, in particular to an LLC magnetic integration integrated transformer. Background In modern electronics LLC resonant converters are widely used due to their high efficiency, high power density and good load adaptability. Among them, the transformer is a key component in the LLC resonant converter, and its performance plays a crucial role in the efficiency and stability of the whole circuit. Conventional LLC transformers are typically composed of a winding support, an upper core, and a lower core, with magnetic flux transfer between the cores through an air gap. However, this design has a significant limitation in that the leakage inductance of the transformer is difficult to precisely control and regulate. Leakage inductance is an important parameter in transformer design, which directly affects the efficiency, power factor, and electromagnetic compatibility (EMC) of the transformer. In conventional designs, the leakage inductance is mainly determined by the structure of the core and the layout of the windings, and once the core and windings are fixed, the magnitude of the leakage inductance is difficult to change. This makes it difficult for engineers to optimally adjust leakage inductance according to different operating conditions and requirements in practical applications, thereby limiting further improvement of transformer performance. For example, in some high power density applications, smaller leakage inductance may lead to reduced efficiency of the transformer, while in some cases where it is susceptible to electromagnetic interference, larger leakage inductance may in turn cause electromagnetic compatibility problems. Therefore, how to effectively adjust and optimize the leakage inductance of the transformer is a problem to be solved in the current transformer design field. Disclosure of utility model The utility model provides an LLC magnetic integration integrated transformer, which aims to solve the problem that leakage inductance of the existing LLC magnetic integration integrated transformer is difficult to adjust. The specific technical scheme of the utility model is as follows: The LLC magnetic integration integrated transformer comprises a winding support, an upper magnetic core, a lower magnetic core and a placed magnetic core, wherein the upper magnetic core and the lower magnetic core are symmetrically arranged on the upper side and the lower side of the winding support, one end of the winding support is provided with a through hole, the through hole comprises a first accommodating groove and a second accommodating groove, the first accommodating groove is located at the outermost side, the placed magnetic core is fixedly arranged in the first accommodating groove, side protruding columns are arranged at the same ends of the upper magnetic core and the lower magnetic core, the side protruding columns are arranged in the second accommodating groove, a first air gap is arranged between the placed magnetic core and the side protruding columns, and a second air gap is arranged between the side protruding columns of the upper magnetic core and the lower magnetic core. Further, the side at the two ends of the winding support is provided with a protruding portion, a pin is arranged on the protruding portion, the bottom surface of one protruding portion of the winding support is provided with a glue guiding groove, conductive glue is arranged in the glue guiding groove, and the pin in the glue guiding groove is electrically connected with the lower magnetic core through the conductive glue. Further, a wire-releasing groove is arranged between the protruding parts at one end of the winding bracket. Further, a wire winding groove is formed in the middle of the wire winding support. Further, the top and the bottom of one end opposite to the through hole on the winding support are provided with V-shaped bulges, and the upper magnetic core and the lower magnetic core are provided with V-shaped grooves matched with the V-shaped bulges. Further, place the magnetic core from top to bottom with the male mode setting in first holding tank, the both sides of placing the magnetic core upper end are provided with spacing arch, spacing arch sets up at the top of wire winding skeleton. Further, the width of the placed magnetic core is larger than the width of the side protruding columns, and the width of the placed magnetic core are measured along the left side and the right side of the winding framework. Further, the structure of the upper magnetic core is the same as that of the lower magnetic core, a central convex column is arranged in the middle of the upper magnetic core, supporting convex columns are arranged on two sides of the upper magnetic core, the central convex columns are in abutting connection after penetrating through the winding support, and the supporting convex co