CN-116825510-B - Resonant transformer

CN116825510BCN 116825510 BCN116825510 BCN 116825510BCN-116825510-B

Abstract

A resonant transformer is disclosed that employs a vertical structural design to reduce eddy current losses. In particular, the split slot type winding frame for winding the coil adopts a two-piece structure design, so that the modular design and assembly are facilitated. The resonant transformer mainly comprises a first iron core, a second iron core, a first winding frame, a second winding frame, a first terminal seat and a second terminal seat, wherein a secondary winding is wound on the first winding frame (for short, a sub-sleeve), and a primary winding is wound on the second winding frame (for short, a main sleeve). Furthermore, the invention also designs a cover body sleeved with the main sleeve so as to isolate the primary winding on the main sleeve from the secondary winding on the sub sleeve by utilizing the cover body. According to the design, the resonant transformer of the invention allows the corresponding sub-sleeve to be replaced to meet different application requirements (such as high current output or low current output).

Inventors

ZHANG SHAOZHUANG

Assignees

明纬(广州)电子有限公司
明纬企业股份有限公司

Dates

Publication Date: 20260508
Application Date: 20220321

Claims (8)

1. A resonant transformer, comprising: A first iron core; the first winding frame is provided with a first pipe fitting, a first plate connected with one end of the first pipe fitting and a second plate connected with the other end of the first pipe fitting, wherein a secondary winding is wound on the first pipe fitting, and the first plate is arranged on the first iron core; the first terminal seat is formed on one side edge of the first plate and is provided with a plurality of first terminals; The second winding frame is arranged on the first winding frame and is provided with a second pipe fitting, a third plate connected with one end of the second pipe fitting and a fourth plate connected with the other end of the second pipe fitting, wherein a primary winding is wound on the second pipe fitting; the second terminal seat is formed on one side of the third plate and is provided with a plurality of second terminals; The support structure comprises a left support piece and a right support piece, wherein the left support piece and the right support piece are arranged along two side edges of the third plate and are connected with the second terminal seat through one end of the left support piece and one end of the right support piece; A cover body sleeved on the second winding frame to partially cover the third plate and the fourth plate and supported by the supporting structure, and A second core disposed above the fourth plate; a left gap is formed between the left support piece and the left side edge of the third plate, a right gap is formed between the right support piece and the right side edge of the third plate, and the third plate is overlapped on the second plate through the left support piece and the right support piece; the bottom surface of the third plate is provided with a setting area for setting the magnetic element therein, and the magnetic element is positioned between the primary winding and the secondary winding to adjust the leakage inductance of the resonant transformer.
2. The resonant transformer of claim 1, wherein the second terminal is a linear terminal and the first terminal is any one selected from the group consisting of a linear terminal and an L-shaped terminal.
3. The resonant transformer of claim 1, wherein the first core is an E-shaped core, the first tube has a first hollow, the first plate has a first opening in communication with the first hollow, the second plate has a second opening in communication with the first hollow, and a first intermediate portion of the first core extends into the first hollow through the first opening.
4. A resonant transformer according to claim 3, wherein the second core is also an E-shaped core, the second tube has a second hollow, the third plate has a third opening communicating with the second hollow, the fourth plate has a fourth opening communicating with the second hollow, and the second intermediate portion of the second core penetrates into the second hollow through the fourth opening.
5. The resonant transformer of claim 1, wherein the enclosure is a U-shaped enclosure surrounded by a U-shaped intermediate plate, a U-shaped upper plate, and a U-shaped lower plate.
6. The resonant transformer of claim 5, wherein the left portion of the U-shaped lower plate is partially embedded in the left gap, the right portion of the U-shaped lower plate is partially embedded in the right gap, and the U-shaped upper plate faces the upper surface of the fourth plate with its lower surface when connected to the second bobbin.
7. The resonant transformer of claim 4, wherein two first limiting members are disposed on the lower surface of the first plate, and a limiting space is disposed between the two first limiting members, so that the first iron core is limited in the limiting space.
8. The resonant transformer of claim 7, wherein the upper surface of the fourth plate is provided with two second limiting members, and a limiting space is also provided between the two second limiting members, so that the second iron core is limited in the limiting space.

Description

Resonant transformer Technical Field The present invention relates to the field of power electronics, and more particularly, to a resonant transformer applied in a power conversion device. Background As electronic products evolve and develop, different electronic products need to be driven with different voltages, and manufacturers of power supply devices are actively attempting to develop various suitable transformers for application in corresponding power supply devices. Currently, there are two types of resonant transformers with primary and leakage inductance. The first type utilizes the main transformer and the resonant inductor to generate and adjust the leakage inductance by the resonant inductor, but this option requires two components of the main transformer and the resonant inductor at the same time, so that the required use space is large, which is not beneficial to miniaturization design. The second type is a split-tank transformer having two sets of windings to generate a main magnetic induction path and a leakage magnetic induction path, respectively, the two windings being spaced apart from each other and the number of turns of their windings being adjusted to control the leakage inductance value. Therefore, the split tank transformer is then the mainstream of the resonant transformer. In the prior art, a resonant transformer is designed into a vertical structure, and a primary lead pin and a secondary lead pin are respectively arranged at two sides of a slot-type winding frame. However, with the slim down (i.e., reduced height) of the vertical resonant transformer, it is necessary to wind three layers of insulating wire (Triple Insulated wire) as coils on the split bobbin to form the primary winding and the secondary winding, resulting in high manufacturing costs of the resonant transformer. Furthermore, the size of the conventional split-slot type bobbin is fixed and cannot be adaptively adjusted and changed according to application requirements, so that the conventional resonant transformer can only be applied to a power conversion device of a specified model. From the foregoing, it is apparent that there is still a need for improvement in structural design of conventional vertical resonant transformers. In view of the above, the present inventors have studied the invention as much as possible, and have finally developed a resonant transformer according to the present invention. Disclosure of Invention The invention mainly aims to provide a resonant transformer which adopts a vertical structural design to reduce eddy current loss. In particular, the split slot type winding frame for winding the coil adopts a two-piece structure design, so that the modular design and assembly are facilitated. The resonant transformer mainly comprises a first iron core, a second iron core, a first winding frame, a second winding frame, a first terminal seat and a second terminal seat, wherein a secondary winding is wound on the first winding frame (for short, a sub-sleeve), and a primary winding is wound on the second winding frame (for short, a main sleeve). Furthermore, the invention also designs a cover body sleeved with the main sleeve so as to isolate the primary winding on the main sleeve from the secondary winding on the sub sleeve by utilizing the cover body. According to the design, the resonant transformer of the invention allows the corresponding sub-sleeve to be replaced to meet different application requirements (such as high current output or low current output). To achieve the above object, the present invention provides an embodiment of the resonant transformer, which includes: A first iron core; the first winding frame is provided with a first pipe fitting, a first plate connected with one end of the first pipe fitting and a second plate connected with the other end of the first pipe fitting, wherein a secondary winding is wound on the first pipe fitting, and the first plate is arranged on the first iron core; the first terminal seat is formed on one side edge of the first plate and is provided with a plurality of first terminals; The second winding frame is arranged on the first winding frame and is provided with a second pipe fitting, a third plate connected with one end of the second pipe fitting and a fourth plate connected with the other end of the second pipe fitting, wherein a primary winding is wound on the second pipe fitting; the second terminal seat is formed on one side of the third plate and is provided with a plurality of second terminals; The support structure comprises a left support piece and a right support piece, wherein the left support piece and the right support piece are arranged along two side edges of the third plate and are connected with the second terminal seat through one end of the left support piece and one end of the right support piece; A cover body sleeved on the second winding frame to partially cover the third plate and the fourth plate and supported by th