CN218351259U

CN218351259U - Leakage inductance constant high-frequency transformer structure

Info

Publication number: CN218351259U
Application number: CN202222257517.1U
Authority: CN
Inventors: 曹征良; 朱正华
Original assignee: Nanjing Yingfa Electronic Technology Co ltd
Current assignee: Nanjing Yingfa Electronic Technology Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2023-01-20
Anticipated expiration: 2032-08-26

Abstract

The utility model discloses a constant high frequency transformer structure of leakage inductance belongs to high frequency transformer technical field, including magnetic core and winding frame, winding frame lateral wall cover is equipped with the wire winding, and the winding frame lateral wall is connected with two fixed plates, and the fixed plate lateral wall is provided with a plurality of bases, and the base lateral wall is connected with the stitch, and another lateral wall that the base is relative is connected with the movable plate, is provided with a plurality of commentaries on classics boards in the fixed plate. The utility model discloses an elliptical column appearance design of winding frame makes each circle of transformer primary winding short with line length, and this has reduced the distributed capacitance of primary winding self effectively, also lets the magnetic flux more coupled between primary and the secondary coil, will leak the inductance and stabilize in a less interval, and the setting of pivot and spring simultaneously can let the user confirm the distance of moving base to the stitch quantity that uses as required adjusts the interval, and the suitability of the high frequency transformer that makes is higher.

Description

Leakage inductance constant high-frequency transformer structure

Technical Field

The utility model relates to a high frequency transformer technical field especially relates to a constant formula high frequency transformer structure of leakage inductance.

Background

The high-frequency transformer is a power transformer with the working frequency exceeding the intermediate frequency (10 kHz), is mainly used as a high-frequency switching power transformer in a high-frequency switching power supply, and is also used as a high-frequency inverter power transformer in a high-frequency inverter power supply and a high-frequency inverter welding machine. In the design of high-frequency transformers, the leakage inductance and distributed capacitance of the transformer must be minimized because high-frequency square-wave signals are transmitted by the high-frequency transformer in the switching power supply. During the transient of transmission, leakage inductance and distributed capacitance can cause surge current and peak voltage, as well as top oscillation, resulting in increased losses. The leakage inductance of the transformer is controlled to be 1% -3% of the primary inductance.

The leakage inductance of the transformer is caused by incomplete coupling of magnetic flux between a primary coil and a secondary coil, between layers and between turns, and the common high-frequency transformer lead pins have different use environments and different quantities, and cannot be suitable for different use environments.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the leakage inductance of a high-frequency transformer in the prior art is easy to be too large and the adaptability is low, and the leakage inductance constant high-frequency transformer structure provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a constant formula high frequency transformer structure leaks and feels, includes magnetic core and winding frame, winding frame lateral wall cover is equipped with the wire winding, the winding frame lateral wall is connected with two fixed plates, the fixed plate lateral wall is provided with a plurality of bases, the base lateral wall is connected with the stitch, another lateral wall that the base is relative is connected with the movable plate, be provided with a plurality of commentaries on classics boards in the fixed plate, it is connected with the pivot to change the board bottom, the pivot both ends all are connected with the connecting plate, connecting plate one side is provided with the telescopic link, telescopic link lateral wall cover is equipped with the spring, telescopic link one end is connected with limit slide.

Preferably, the number of magnetic cores is two, and the longitudinal symmetry sets up, set up the through-hole in the winding frame, through-hole inside wall and magnetic core lateral wall sliding connection.

Preferably, the side wall of the fixing plate is fixedly connected with the outer side wall of the winding frame, and the winding frame is an elliptic cylinder.

Preferably, the side wall of the base is fixedly connected with one end of the pin, and the other side wall of the base opposite to the side wall of the moving plate is fixedly connected with the side wall of the moving plate.

Preferably, the bottom end of the rotating plate is fixedly connected with the outer side wall of the rotating shaft, and the port of the rotating shaft is fixedly connected with the side wall of the connecting plate.

Preferably, the other side wall of the connecting plate is fixedly connected with one end of a telescopic rod and one end of a spring, and the other end of the telescopic rod is fixedly connected with the side wall of the limiting sliding block.

Preferably, the outer side wall of the limiting slide block is slidably connected with a limiting sliding groove, a cavity groove is formed in the fixing plate, and the inner side wall of the cavity groove is fixedly connected with the outer side wall of the limiting sliding groove.

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

1. in the scheme, the length of each turn of the primary winding of the transformer is short by the design of the external shape of the elliptic cylinder of the winding frame, so that the distributed capacitance of the primary winding is effectively reduced, the magnetic flux between the primary coil and the secondary coil is more coupled, and the leakage inductance is stabilized in a smaller interval.

2. In this scheme, through the setting of pivot and spring, can let the user confirm the distance of removal base to the stitch quantity that uses as required adjusts the interval, and the suitability of the high frequency transformer who makes is higher.

Drawings

Fig. 1 is a schematic diagram of a three-dimensional structure of a leakage inductance constant high-frequency transformer structure provided by the present invention;

fig. 2 is a schematic structural diagram of a winding frame in a leakage inductance constant high-frequency transformer structure provided by the present invention;

fig. 3 is a schematic structural view of a fixing plate in a leakage inductance constant high-frequency transformer structure provided by the present invention;

fig. 4 is the utility model provides a structural schematic diagram of telescopic link in leakage inductance constant high frequency transformer structure.

In the figure: 1. a magnetic core; 2. a winding frame; 3. winding; 4. a fixing plate; 5. a base; 6. moving the plate; 7. a stitch; 8. rotating the plate; 9. a rotating shaft; 10. a connecting plate; 11. a telescopic rod; 12. a spring; 13. a limiting slide block; 14. and a limiting sliding groove.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

Referring to fig. 1-4, a constant high-frequency transformer structure of leakage inductance, including magnetic core 1 and winding

frame

2, 2 lateral walls of winding frame are equipped with wire winding 3, 2 lateral walls of winding frame are connected with two

fixed plates

4, 4 lateral walls of fixed plates are provided with a plurality of

bases

5, 5 lateral walls of bases are connected with stitch 7, another relative lateral wall of base 5 is connected with movable plate 6, be provided with a plurality of commentaries on classics board 8 in the

fixed plate

4, 8 bottom of commentaries on classics board is connected with pivot 9, pivot 9 both ends all are connected with connecting plate 10, connecting plate 10 one side is provided with

telescopic link

11, 11 lateral walls of telescopic link are overlapped and are equipped with

spring

12, 11 one end of telescopic link is connected with limit slide 13.

The side wall of the fixing plate 4 is fixedly connected with the outer side wall of the winding frame 2, and the winding frame 2 is in an elliptic cylinder shape;

it should be noted that: compared with the common cylindrical or rectangular frame, the elliptic cylinder of the winding frame 2 can lead the length of each turn of the primary winding of the transformer to be the shortest;

the further benefits of using the above are: the wire consumption of the whole winding is minimized, and the self distributed capacitance of the primary winding can be effectively reduced;

the other side wall of the connecting plate 10 is fixedly connected with one end of a telescopic rod 11 and one end of a spring 12, the other end of the telescopic rod 11 is fixedly connected with the side wall of a limiting slide block 13, the outer side wall of the limiting slide block 13 is connected with a limiting slide groove 14 in a sliding manner, a cavity groove is formed in the fixing plate 4, and the inner side wall of the cavity groove is fixedly connected with the outer side wall of the limiting slide groove 14;

it should be noted that: the fixed plate 4 is internally provided with a clamping groove for horizontally limiting the moving plate 6, the rotating plate 8 rotates to drive the rotating shaft 9 to rotate, in the process, the rotating shaft 9 converts the force in the horizontal direction into the force for compressing the spring 12, the force in the vertical direction can drive the two limiting slide blocks 13 to move up and down in the limiting slide grooves 14, and when the moving plate 6 completely passes through, the rotating plate 8 can reset under the action of the spring 12;

the further benefits of using the above are: the user can adjust the interval according to the stitch 7 quantity that needs used, the suitability of the high frequency transformer that makes is higher.

When the high-frequency transformer is used and the high-frequency transformer in the scheme is manufactured, because the designed winding frame 2 is an elliptic cylinder, when the high-frequency transformer is wound around a primary winding, compared with a common cylinder or cuboid winding frame 2, the length of the wire used for each turn of the primary winding of the transformer can be shortest, so that the wire used for the whole winding is minimum, the distributed capacitance of the primary winding is effectively reduced, the number of turns and the number of layers of the winding are easy to clear at two ends of the ellipse, the metal wires cannot be worn, the magnetic flux between the primary winding and the secondary winding is more coupled, the leakage inductance is stabilized in a smaller interval, the base 5 is pulled outwards, the movable plate 6 can be separated from the clamping groove in the fixed plate 4, and the movement of the base 5 in the horizontal direction is realized, the base 5 moves and drives the moving plate 6 to move, when the moving plate 6 moves and passes through a rotating plate 8, the rotating plate 8 can be driven to rotate by an angle, the rotating shaft 9 can rotate, the rotating shaft 9 converts the force in the horizontal direction into the force compressing a spring 12 in the process, the force in the vertical direction can drive two limiting slide blocks 13 to move up and down in a limiting sliding groove 14, when the moving plate 6 completely passes through, the rotating plate 8 can reset under the action of the spring 12, the base 5 is pushed inwards after the moving is completed, a clamping groove in the fixed plate 4 is enabled to horizontally limit the moving plate 6, a user can determine the moving distance through the moving plate 6 through the rotating plates 8, the distance is adjusted according to the number of pins 7 needed to be used, and the applicability of the high-frequency transformer is higher.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a constant formula high frequency transformer structure leaks and feels, includes magnetic core (1) and winding frame (2), its characterized in that, winding frame (2) lateral wall cover is equipped with wire winding (3), winding frame (2) lateral wall is connected with two fixed plates (4), fixed plate (4) lateral wall is provided with a plurality of bases (5), base (5) lateral wall is connected with stitch (7), another relative lateral wall of base (5) is connected with movable plate (6), be provided with a plurality of commentaries on classics board (8) in fixed plate (4), commentaries on classics board (8) bottom is connected with pivot (9), pivot (9) both ends all are connected with connecting plate (10), connecting plate (10) one side is provided with telescopic link (11), telescopic link (11) lateral wall cover is equipped with spring (12), telescopic link (11) one end is connected with spacing slider (13).

2. The leakage inductance constant high frequency transformer structure according to claim 1, wherein the number of the magnetic cores (1) is two, and the magnetic cores are arranged symmetrically up and down, the winding frame (2) is provided with through holes, and the inner side walls of the through holes are connected with the outer side walls of the magnetic cores (1) in a sliding manner.

3. The leakage inductance constant high frequency transformer structure according to claim 1, wherein the side wall of the fixing plate (4) is fixedly connected with the outer side wall of the winding frame (2), and the winding frame (2) is shaped like an elliptic cylinder.

4. The leakage inductance constant high frequency transformer structure according to claim 1, wherein the sidewall of the base (5) is fixedly connected to one end of the pin (7), and the other sidewall of the base (5) opposite to the sidewall is fixedly connected to the sidewall of the moving plate (6).

5. The leakage inductance constant high frequency transformer structure according to claim 1, wherein the bottom end of the rotating plate (8) is fixedly connected with the outer side wall of the rotating shaft (9), and the port of the rotating shaft (9) is fixedly connected with the side wall of the connecting plate (10).

6. The leakage inductance constant type high-frequency transformer structure according to claim 1, wherein the other side wall of the connecting plate (10) is fixedly connected with one end of a telescopic rod (11) and one end of a spring (12), and the other end of the telescopic rod (11) is fixedly connected with the side wall of a limiting slide block (13).

7. The leakage inductance constant high frequency transformer structure according to claim 1, wherein the outer side wall of the limit slider (13) is slidably connected with a limit chute (14), a cavity groove is formed in the fixed plate (4), and the inner side wall of the cavity groove is fixedly connected with the outer side wall of the limit chute (14).