CN210120026U

CN210120026U - Transformer and power supply comprising same

Info

Publication number: CN210120026U
Application number: CN201921109777.6U
Authority: CN
Inventors: 胡锋
Original assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd
Current assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-02-28
Anticipated expiration: 2029-07-15

Abstract

The utility model discloses a transformer and contain its power, this transformer includes: the magnetic core comprises a first magnetic column and a second magnetic column; the input winding comprises a first input winding and a second input winding; the output winding comprises a first output winding, a second output winding and a connecting band, the first input winding and the first output winding are wound on the first magnetic column, and the second input winding and the second output winding are wound on the second magnetic column; the first output winding and the second output winding both comprise a first end and a second end, the first ends of the first output winding and the second output winding are positioned on the same side of the output windings, the connecting band is connected with the two first ends and is perpendicular to the first output winding and the second output winding, the width size of the whole output winding is reduced, and the transformer can be manufactured to be narrower. The power supply containing the transformer can also be made narrow so that the power supply can be used in a narrower space.

Description

Transformer and power supply comprising same

Technical Field

The utility model relates to a transformer technical field, in particular to transformer and contain its power.

Background

In the selection of the high-power transformer, most of the high-power transformers are PQ series, EQ series or EFD series magnetic cores, and the width of each magnetic core is larger than 40mm, so that the requirements of application occasions such as a transparent screen cannot be met.

Due TO the requirement of aesthetic degree, the market demands for ultra-narrow high-power supplies are more and more obvious, and up TO now, the width of a transformer is made TO be 39mm and the width of the whole power supply is 45mm in the narrowest 400W AC TO DC power supply on the market. But still cannot be applied to narrower spaces.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a transformer and contain the power of this transformer, the width size of this transformer can further be done narrowly, and the width size of the power that contains this transformer is followed and is done narrowly, and then overcomes the situation emergence that the power can't be applicable to narrow space.

According to the utility model discloses an aspect provides a transformer, include:

a magnetic core comprising a first magnetic post and a second magnetic post;

the input winding comprises a first input winding and a second input winding, the first input winding is wound on the first magnetic column, and the second input winding is wound on the second magnetic column;

the output winding comprises a first output winding, a second output winding and a connecting band, the first output winding is wound on the first magnetic column, and the second output winding is wound on the second magnetic column; the first output winding and the second output winding both comprise a first end and a second end, the first end of the first output winding and the first end of the second output winding are located on the same side of the output winding, the connecting band is connected with the first ends, and the connecting band is perpendicular to the first output winding and the second output winding.

According to the utility model discloses the first aspect, the second of first output winding holds the inboard and is connected with the first magnetic core below of participating in, the second of second output winding holds the inboard and is connected with the second and participates in, the first with the second participates in all directional magnetic core below.

According to the first aspect of the present invention, the output winding, the first pin and the second pin are integrally formed by a metal plate.

According to the utility model discloses the first aspect, still including the portion of cup jointing, the one end of the portion of cup jointing with the connecting band is connected, the portion of cup jointing sets to be located the coplanar with first output winding or second output winding, keep the clearance between the portion of cup jointing and the output winding, the cover is equipped with one or more magnetic rings in the portion of cup jointing.

According to the utility model discloses in the first aspect, the other end of cup joint portion forms the third and participates in, the orientation that the third participated in with the first orientation of participating in and the orientation that the second participated in is unanimous, the third is participated in and is located within the width range of output winding.

According to the utility model discloses the first aspect, the magnetic core still includes magnetic cover and lower magnetic cover, go up the upper end that the magnetic cover is connected at first magnetism post and second magnetism post, the lower tip at first magnetism post and second magnetism post is connected to lower magnetic cover, the width of going up magnetic cover and lower magnetic cover is all not greater than the width of output winding, be provided with first breach and second breach down on the magnetic cover, first participate in the pass first breach, the second participates in the pass the second breach.

According to the first aspect of the present invention, the first input winding includes a first bobbin and a first coil, the first coil is wound on the first bobbin, and the first bobbin is sleeved on the first magnetic pillar; the upper surface of the first framework is attached to the upper magnetic cover, and the lower surface of the first framework is attached to the upper surface of the first output winding;

the second input winding comprises a second framework and a second coil, the second coil is wound on the second framework, and the second framework is sleeved on the second magnetic column; the upper surface of the second framework is attached to the upper magnetic cover, and the lower surface of the second framework is attached to the upper surface of the second output winding.

According to the first aspect of the present invention, the first coil and the second coil are connected in series.

According to the present invention, the cross section of the first magnetic pillar and the second magnetic pillar is set to be square.

According to the utility model discloses a second aspect provides a power, include the transformer, still include the PCB circuit board, first participate in the second participate in and the third participate in insert respectively to the PCB circuit board on, the width size of PCB circuit board is not more than the width size of output winding.

Has the advantages that: since the thickness dimension of the connection band is much smaller than its own width dimension, after the connection band is arranged perpendicular to the first output winding and the second output winding, the width dimension of the entire output winding is further reduced, thereby making the transformer narrower. Further, the minimum width dimension of the power supply including the transformer may be designed with reference to the width dimension of the transformer, so that the size of the power supply may be narrowed, thereby enabling the power supply to be installed and used in a narrower space.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples;

FIG. 1 is a schematic diagram of a longitudinal cross-sectional structure of a transformer;

FIG. 2 is a schematic perspective view of an output winding;

FIG. 3 is a rear side view of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is a schematic diagram of a planar structure of the output winding after being unwound;

FIG. 6 is a top view of the lower core;

FIG. 7 is a side view of the lower core;

fig. 8 is a schematic perspective view of the first frame.

Fig. 9 is a side view of fig. 8.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, 6 and 7, an embodiment of the present invention provides a transformer, which mainly comprises a magnetic core 30, an input winding and an output winding 10.

The magnetic core 30 includes an upper magnetic cover, a lower magnetic cover, a first magnetic pillar, and a second magnetic pillar. Specifically, the first magnetic column and the second magnetic column respectively comprise an upper magnetic column and a lower magnetic column which are butted up and down. The two upper magnetic columns are connected to two sides of the bottom of the upper magnetic cover to form an upper magnetic core 31; two lower magnetic columns are connected on both sides of the top of the lower magnetic cover to constitute a lower magnetic core 32. The upper core 31 and the lower core 32 are both U-shaped cores 30. The upper core 31 and the lower core 32 may be wound by an insulating adhesive to be stably butted.

The input winding comprises a first input winding 21 and a second input winding 22, the first input winding 21 is wound on the first magnetic pole, the second input winding 22 is wound on the second magnetic pole, and the first input winding 21 and the second input winding 22 are electrically connected in series. Be different from the magnetic core 30 that is provided with the center pillar in the middle, use the utility model provides a magnetic core 30, magnetic core 30 is inside has been transformed into single magnetic path by double magnetic circuit. On one hand, the number of coils of the first input winding 21 and the second input winding 22 can be reduced, and the width and the height of the first input winding 21 and the second input winding 22 are further reduced; on the other hand, the occupied partial volume of the center post is saved, so that the whole transformer can have a smaller volume.

Referring to fig. 2 to 4, the output winding 10 is composed of a first output winding 11, a second output winding 12, and a connection band 13. The first output winding 11 is wound on the first magnetic pole, and the second output winding 12 is wound on the second magnetic pole. The middle parts of the first output winding 11 and the second output winding 12 are provided with through holes, the first magnetic column and the second magnetic column respectively pass through the through holes on the first output winding 11 and the second output winding 12, and the first input winding 21 and the second input winding 22 are both positioned between the upper magnetic cover and the output winding 10. The first output winding 11 and the second output winding 12 both include a first end and a second end, the first end of the first output winding 11 and the first end of the second output winding 12 are located on the same side of the output winding 10, the connecting band 13 is connected to the two first ends, and the connecting band 13 is perpendicular to the first output winding 11 and the second output winding 12.

Specifically, the connection band 13 may be vertically connected above or below the first output winding 11 and the second output winding 12, and the width may be narrowed in both directions. The first output winding 11, the second output winding 12 and the connecting band 13 can be made by cutting copper sheets, and the first output winding 11, the second output winding 12 and the connecting band 13 are communicated to form the output winding 10.

The width of the connection band 13 is close to the width of the first output winding 11 or the second output winding 12. Since the thickness dimension of the connection strap 13 is much smaller than its own width dimension, after the connection strap 13 is disposed perpendicularly to the first output winding 11 and the second output winding 12, the width dimension of the entire output winding 10 is further reduced, thereby allowing the transformer to be made narrower.

Preferably, the first pin 111 is connected to the inner side of the second end of the first output winding 11, the second pin 121 is connected to the inner side of the second end of the second output winding 12, and both the first pin 111 and the second pin 121 point below the magnetic core 30. The first pin 111 is located right below the body of the first output winding 11 and is arranged close to the through hole; similarly, the second pin 121 is located right below the body of the second output winding 12 and is disposed close to the through hole. The transformer is plugged on the PCB through the first pin 111 and the second pin 121.

In order to realize the stable connection of the first pins 111 and the second pins 121 with the PCB, it is required to ensure that the first pins 111 and the second pins 121 are plugged in the middle portion of the PCB. The pins of the output winding 10 in the prior art are arranged at the outer contour edge of the output winding 10, and therefore, the width dimension of the PCB circuit board must be made larger than that of the output winding 10, and thus, the power size including the transformer is followed to be widened.

In the embodiment, the first pin 111 and the second pin 121 are both located inside the maximum outer contour of the output winding 10, the width dimension of the PCB circuit board for the insertion of the output winding 10 is made to be the same as the width dimension of the output winding 10, and the first pin 111 and the second pin 121 can be stably inserted in the middle of the PCB circuit board, thereby effectively avoiding additional widening of the PCB circuit board.

Preferably, the output winding 10, the first pin 111, and the second pin 121 are integrally manufactured from one metal plate. Referring to fig. 5, the metal plate may be a copper plate, which is cut to a designed size through a cutting process, and then bent downward of the first and

second pins

111 and 121 and bent upward of the connection band 13 through a bending process. The output winding 10, the first pin 111 and the second pin 121 are integrally formed, and the manufacturing process is simplified.

Further, the output winding 10 is also provided with a socket joint part 40, the socket joint part 40 may be a copper bar, one end of the copper bar is connected with the connecting band 13, the copper bar is arranged to be located on the same plane as the first output winding 11 or the second output winding 12, a gap is maintained between the copper bar and the output winding 10, and the size of the gap is based on the sleeving of the magnetic ring 50.

The number of the magnetic rings 50 sleeved on the copper bar is one or more, and the actual requirement is the standard. Specifically, the magnetic ring 50 may be sendust, the magnetic ring 50 is sleeved on the copper bar to form an inductance winding, and the inductance winding and the output winding 10 are arranged side by side, so that the whole transformer has a compact structure, and is beneficial to the size of a small transformer.

Preferably, the other end of the socket part 40 forms a third pin 41, the orientation of the third pin 41 is consistent with the orientation of the first pin 111 and the second pin 121, and the third pin 41 is located within the width of the output winding 10. The third pins 41 are also inserted into the PCB circuit board without affecting the width dimension of the entire transformer.

Wherein, the socket joint part 40 can be manufactured with the output winding 10 as a whole, simplifying the manufacturing process. The socket 40 can also be manufactured separately for flexible adjustment. The distance between the sleeve portion 40 and the output winding 10 depends on the size of the magnetic ring 50, and the sleeve portion 40 is fixedly connected to a specific position on the connecting band 13 to ensure that the magnetic ring 50 can be sleeved smoothly.

Referring to fig. 6 and 7 again, in this embodiment, the widths of the upper magnetic cover and the lower magnetic cover in the magnetic core 30 are not greater than the width of the output winding 10, the lower magnetic cover is attached to the lower surface of the output winding 10, and since the first pin 111 and the second pin 121 both extend to the lower magnetic core 32, in order to ensure that the first pin 111 and the second pin 121 can be smoothly inserted into the PCB without interference from the lower magnetic cover, the lower magnetic cover is provided with a first notch and a second notch, the first pin 111 can pass through the first notch, and the second pin 121 can pass through the second notch.

Preferably, in this embodiment, the first input winding 21 includes a first bobbin 211 and a first coil 212, the first coil 212 is wound on the first bobbin 211, and the first bobbin 211 is sleeved on the first magnetic pillar; the upper surface of the first framework 211 is attached to the upper magnetic cover, and the lower surface of the first framework 211 is attached to the upper surface of the first output winding 11. The second input winding 22 comprises a second framework 221 and a second coil 222, the second coil 222 is wound on the second framework 221, and the second framework 221 is sleeved on the second magnetic column; the upper surface of the second bobbin 221 is attached to the upper magnetic cover, and the lower surface of the second bobbin 221 is attached to the upper surface of the second output winding 12. The first skeleton 211 and the second skeleton 221 may be the same skeleton with the same structure. Referring to fig. 8 and 9, grooves are formed in the first bobbin 211 and the second bobbin 221 to wind the first coil 212 and the second coil 222, and the first coil 212 and the second coil 222 are connected in series through an electric wire.

Preferably, the cross section of the first magnetic pillar and the second magnetic pillar in the present embodiment is set to be square. Compared with a circular magnetic column, the width of the square magnetic column can be narrower when the square magnetic column is wound around a coil with the same length, and narrowing of the transformer is facilitated.

A power supply comprises the transformer, a PCB circuit board, a shell and the like. The first pin 111, the second pin 121 and the third pin 41 are respectively inserted into a PCB, the width of the PCB is not greater than the width of the output winding 10, and the transformer and the PCB are mounted inside the housing. The minimum width dimension of the power supply including the transformer can be designed with reference to the width dimension of the transformer, so that the size of the power supply can be narrowed, and the power supply can be installed and used in a narrower space.

The transformer can control the width within 25mm, the whole power supply width can be controlled within 30mm, and compared with the smallest power supply in the market, the width is reduced by 33%, and the effect is obvious.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A transformer, comprising:

a magnetic core comprising a first magnetic post and a second magnetic post;

2. The transformer of claim 1, wherein: the inner side of the second end of the first output winding is connected with a first pin, the inner side of the second end of the second output winding is connected with a second pin, and the first pin and the second pin point to the lower part of the magnetic core.

3. The transformer of claim 2, wherein: the output winding, the first pin and the second pin are integrally manufactured by a metal plate.

4. The transformer of claim 2, wherein: the magnetic ring winding device is characterized by further comprising a sleeving part, one end of the sleeving part is connected with the connecting band, the sleeving part is arranged to be located on the same plane with the first output winding or the second output winding, a gap is kept between the sleeving part and the output winding, and one or more magnetic rings are sleeved on the sleeving part.

5. The transformer of claim 4, wherein: the other end of the sleeve joint part forms a third pin, the orientation of the third pin is consistent with the orientation of the first pin and the second pin, and the third pin is located within the width range of the output winding.

6. The transformer of claim 2, wherein: the magnetic core still includes magnetism lid and lower magnetism lid, go up the magnetism lid and connect the upper end at first magnetism post and second magnetism post, lower magnetism lid is connected at the lower tip of first magnetism post and second magnetism post, the width of going up magnetism lid and lower magnetism lid is all not greater than the width of output winding, be provided with first breach and second breach down on the magnetism lid, first participate in the penetration first breach, the second participates in the penetration the second breach.

7. The transformer of claim 6, wherein: the first input winding comprises a first framework and a first coil, the first coil is wound on the first framework, and the first framework is sleeved on the first magnetic column; the upper surface of the first framework is attached to the upper magnetic cover, and the lower surface of the first framework is attached to the upper surface of the first output winding;

8. The transformer of claim 7, wherein: the first coil and the second coil are connected in series with each other.

9. The transformer according to claim 1 or 2, characterized in that: the cross sections of the first magnetic column and the second magnetic column are arranged to be square.

10. A power supply comprising the transformer of claim 5, and further comprising a PCB circuit board, the first pin, the second pin, and the third pin being inserted onto the PCB circuit board, respectively, the PCB circuit board having a width dimension not greater than a width dimension of the output winding.