CN221262117U

CN221262117U - Power transformer

Info

Publication number: CN221262117U
Application number: CN202323246275.7U
Authority: CN
Inventors: 郑勇; 陈蓓蓓
Original assignee: Leqing Zhongbo Electrical Appliance Co ltd
Current assignee: Leqing Zhongbo Electrical Appliance Co ltd
Filing date: 2023-11-30
Publication date: 2024-07-02
Anticipated expiration: 2033-11-30

Abstract

The utility model discloses a magnetic leakage adjusting method and a power transformer, which comprise a framework and magnetic cores arranged at the top and the bottom of the framework, wherein the two magnetic cores are provided with side posts, a central post and connecting parts for connecting the side posts and the central post, the side posts of the two magnetic cores are mutually abutted, and a gap is arranged between the two central posts. The utility model adjusts the distance between the magnetic core moving block and the center column through the displacement unit to adjust the size of magnetic leakage, thereby being capable of better reducing the loss of power consumption and being very reliable while maintaining smaller inductance fluctuation.

Description

Power transformer

Technical Field

The utility model relates to the technical field of transformers, in particular to a power supply transformer.

Background

The high-frequency transformer is a power transformer with the working frequency exceeding the intermediate frequency (10 kHz), and is mainly used as a high-frequency switching power transformer in a high-frequency switching power supply, and also used as a high-frequency inversion power transformer in a high-frequency inversion power supply and a high-frequency inversion welding machine.

In high frequency transformer applications, in order to achieve energy storage, prevent core saturation, and ensure small fluctuations in inductance under high current operating conditions, it is often necessary to perform an open air gap design on a conventional ferrite core circuit to meet the performance requirements of the product.

However, the arrangement of the air gap also has the following disadvantages: the magnetic flux at the air gap is scattered and leaked, the leaked magnetic flux cuts adjacent windings, high-frequency eddy current loss is generated in the windings, the additional eddy current loss greatly increases the power loss of the transformer, increases the operation temperature rise, reduces the efficiency of the transformer, and the additional high-frequency eddy current loss near the air gap is obviously increased along with the increase of the switching frequency, so that the complexity of the transformer production process is increased.

Disclosure of utility model

First, the technical problem to be solved

In order to solve the problems, the utility model provides a power transformer with low power consumption, adjustable magnetic leakage and simple structure.

(II) technical scheme

The utility model relates to a power transformer, which comprises a framework and magnetic cores arranged at the top and the bottom of the framework, wherein the two magnetic cores are provided with side posts, a central post and a connecting part for connecting the side posts and the central post, the side posts of the two magnetic cores are mutually in butt joint, a gap is further arranged between the two central posts, a through groove which is vertically and penetratingly arranged is arranged at the center of the framework, the central post is arranged in the through groove, a coil is further wound on the framework, a magnetic core moving block is embedded in the central post, a displacement unit is arranged above the magnetic cores, the displacement unit is connected with a moving block at one end of the displacement unit, and the moving block can move up and down in the central post under the driving of the displacement unit.

In the utility model, the whole magnetic core is of a mountain-shaped structure, side posts are arranged at two side parts of the framework, and the end part of the central post of the magnetic core is also provided with a magnetic induction probe and an embedded infrared sensor.

In the utility model, the power transformer also comprises a plurality of pins, wherein the magnetic induction probe and the infrared sensor are electrically connected with the pins, and the magnetic induction probe and the infrared sensor are connected with a circuit when the power transformer is arranged on the circuit board.

In the utility model, the framework is also provided with a temperature sensor for detecting the ambient temperature.

In the utility model, the ends of the center column and the side columns are horizontal planes.

In the utility model, the top of the framework is provided with a blocking wall for limiting the magnetic core, the outer side of the blocking wall is provided with a reinforcing rib for increasing the structural strength of the blocking wall, the pins are all arranged at the bottom of the framework and are all vertically and downwards arranged.

(III) beneficial effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the utility model, the distance between the magnetic core moving block and the center column is adjusted through the displacement unit to adjust the size of magnetic leakage, so that the power consumption can be reduced better while smaller inductance fluctuation is maintained, and the magnetic core moving block is quite reliable.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the overall structure of a power transformer in embodiment 1;

fig. 2 is a schematic cross-sectional structure of the power transformer in embodiment 1.

10. The magnetic core comprises a framework, 20, a magnetic core, 30, a magnetic core moving block, 40, a side column, 50, a central column, 60, a retaining wall, 70, a reinforcing rib, 80, a magnetic induction probe, 90, a gap, 100, an infrared sensor, 110, a displacement unit, 120, a coil, 130, a pin, 140 and a connecting part.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1-2, another power transformer disclosed in the present utility model includes a frame 10, and magnetic cores 20 mounted at the top and bottom of the frame 10, where two of the magnetic cores 20 have side posts 40, a center post 50, and a connection portion 140 connecting the side posts 40 and the center post 50, the side posts 40 of the two magnetic cores 20 are disposed in abutment with each other, a gap 90 is further disposed between the two center posts 50, a through slot penetrating up and down is disposed at the center of the frame 10, the center post 50 is disposed in the through slot, a coil 120 is further wound on the frame 10, a magnetic core moving block 30 is embedded in the center post 50, a displacement unit 110 is disposed above the magnetic core 20, the displacement unit 110 is connected with a moving block at one end thereof, and the moving block can move up and down in the center post 50 under the driving of the displacement unit 110.

Further, the magnetic core 20 is of a zigzag structure, the side posts 40 are disposed at two sides of the frame 10, and the end of the central post 50 of the magnetic core 20 is further provided with a magnetic induction probe 80 and an infrared sensor 100. The power transformer also comprises a plurality of pins 130, wherein the magnetic induction probe 80 and the infrared sensor 100 are electrically connected with the pins 130, and the magnetic induction probe 80 and the infrared sensor 100 are connected with a circuit when the power transformer is arranged on the circuit board.

The infrared sensor 100 and the magnetic induction probe 80 are both embedded in the central column 50, and the infrared sensor 100 and the magnetic induction probe 80 are both relatively stationary and the magnetic core moving block 30 can move up and down in the central column 50. During the gradual contact of the bottom of the core moving block 30 with the center post 50, the gap 90 gradually decreases and the leakage flux decreases.

Specifically, the skeleton 10 is further provided with a temperature sensor for detecting the ambient temperature, and the ends of the center pillar 50 and the side pillars 40 are horizontal planes. The top of skeleton 10 is equipped with the retaining wall 60 that carries out spacing to magnetic core 20, is equipped with the strengthening rib 70 that is used for increasing retaining wall 60 structural strength in the outside of retaining wall 60, pin 130 all sets up in the bottom of skeleton 10 just pin 130 all sets up vertically downwards.

Further, the number of the pins 130 is eight and the pins are arranged in two rows, and the power transformer is electrically connected to the circuit board through the pins 130. In the present application, the displacement unit 110 is a mini-telescopic motor, the telescopic end of the mini-telescopic motor is connected to the top end of the magnetic core moving block 30, the distance of the magnetic core moving block 30 is precisely controlled by the mini-telescopic motor, and meanwhile, the magnetic core moving block 30 is made of the same material as the magnetic core 20 and is made of ferrite.

The above examples are merely illustrative of the preferred embodiments of the present utility model and are not intended to limit the spirit and scope of the present utility model. Various modifications and improvements of the technical scheme of the present utility model will fall within the protection scope of the present utility model without departing from the design concept of the present utility model, and the technical content of the present utility model is fully described in the claims.

Claims

1. The utility model provides a power transformer, its characterized in that includes the skeleton, installs at skeleton top and the magnetic core of bottom, wherein, two the magnetic core has side post, center post and the connecting portion of connecting side post, center post, two the mutual butt of side post of magnetic core sets up, and two still be equipped with the clearance between the center post, the center department of skeleton is equipped with the logical groove that runs through the setting from top to bottom, the center post sets up in the logical inslot, still twine the coil on the skeleton, the embedded magnetic core movable block that is equipped with in the center post, the top of magnetic core is equipped with displacement unit, displacement unit is connected with the movable block of one of them end, but the movable block can reciprocate in the center post under the drive of displacement unit.

2. The power transformer according to claim 1, wherein the core is of a mountain-shaped structure as a whole, and the side posts are provided on both sides of the skeleton, and the center post end of the core is further provided with a magnetic induction probe and an embedded infrared sensor.

3. The power transformer of claim 2, further comprising a plurality of pins, wherein the magnetically susceptible probe, infrared sensor are electrically connected to the pins, and wherein the magnetically susceptible probe, infrared sensor are electrically connected to the circuit when the power transformer is mounted on the circuit board.

4. A power transformer according to claim 3, wherein the skeleton is further provided with a temperature sensor for detecting the ambient temperature.

5. The power transformer of claim 4, wherein the ends of the center post and side posts are horizontal.

6. The power transformer according to claim 5, wherein the top of the skeleton is provided with a blocking wall for limiting the magnetic core, the outer side of the blocking wall is provided with a reinforcing rib for increasing the structural strength of the blocking wall, and the pins are all arranged at the bottom of the skeleton and are all vertically downwards arranged.