CN217955633U - Transformer, power module and switching power supply - Google Patents

Abstract

The utility model provides a transformer, a power module and a switching power supply, wherein the transformer comprises a magnetic core, a primary winding and a secondary winding; the magnetic core comprises a first cover plate, a second cover plate, a winding post and at least two side posts, wherein the first cover plate and the second cover plate are respectively connected with the winding post of the magnetic core and the top surfaces and the bottom surfaces of the at least two side posts; at least one side column is provided with a through channel, the primary winding is wound on the winding column, and a lead of the primary winding penetrates out of the through channel; and the lead of the secondary winding penetrates out of the gap formed by the at least two side columns. The utility model discloses in, the lead wire of primary winding can be followed this through passage and worn out, saves space, improves switching power supply's power density.

Description

Transformer, power module and switching power supply

Technical Field

The utility model relates to a transformer technical field especially relates to a transformer, power module and switching power supply.

Background

With the continuous improvement of the power density of the switching power supply, the components in the switching power supply are placed more and more tightly, and how to effectively utilize the space is one of the important means for improving the power density. At present, as shown in fig. 1, a transformer in a switching power supply generally adopts three layers of insulated wires as a primary winding in a low-voltage output occasion, a magnetic core is arranged at one side of a secondary winding, and a lead wire of the primary winding is led out from a gap formed by side columns of the magnetic core and is pulled away from the secondary winding by a sufficient safety distance. In this case, the lead of the primary winding, which is close to the side leg of the magnetic core, may occupy a certain space, which is not favorable for increasing the power density.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a transformer sets up the passageway that runs through on the magnetic core side post, and primary winding's lead wire can be followed this passageway that runs through and worn out, saves space, improves switching power supply's power density. Another object of the present invention is to provide a power module. Another object of the utility model is to provide a switching power supply.

In order to achieve the above object, one aspect of the present invention discloses a transformer, comprising a magnetic core, a primary winding and a secondary winding;

the magnetic core comprises a first cover plate, a second cover plate, a winding post and at least two side posts, wherein the first cover plate and the second cover plate are respectively connected with the winding post of the magnetic core and the top surfaces and the bottom surfaces of the at least two side posts;

at least one side column is provided with a through channel, the primary winding is wound on the winding column, and a lead of the primary winding penetrates out of the through channel;

and the lead of the secondary winding penetrates out of the gap formed by the at least two side columns.

Optionally, the magnetic core comprises two side legs;

the first cover plate and the second cover plate respectively comprise two opposite long sides and two opposite short sides;

the two side columns are oppositely arranged and are respectively connected with the first cover plate and the long side corresponding to the first cover plate; alternatively, the first and second electrodes may be,

the two side columns are arranged oppositely and are respectively connected with the first cover plate and the short side corresponding to the first cover plate.

Optionally, the two side columns are respectively provided with the through channel.

Optionally, two leads of the primary winding are led out of the through channel of one of the two side legs.

Optionally, the primary winding includes a plurality of first windings, and a lead of each first winding is led out from the same through channel.

Optionally, a chamfer is formed at the through channel of the side column.

Optionally, the winding device further comprises a framework sleeved on the winding post, and the primary winding and the secondary winding are wound on the framework.

Optionally, the current transformer is arranged on a lead of the primary winding.

The utility model also discloses a power module, include as above the transformer.

The utility model also discloses a switching power supply, include as above power module.

The utility model discloses a transformer includes magnetic core, primary winding and secondary winding. The magnetic core comprises a first cover plate, a second cover plate, a winding post and at least two side posts, wherein the first cover plate and the second cover plate are respectively connected with the top surface and the bottom surface of the winding post of the magnetic core and the top surface and the bottom surface of the at least two side posts. At least one side column is provided with a through channel, the primary winding is wound on the winding column, and a lead of the primary winding penetrates out of the through channel. And the lead of the secondary winding penetrates out of the gap formed by the at least two side columns. The utility model discloses in, at least one side post of the magnetic core of transformer has the through passage. Thus, the lead of the primary winding in the transformer can pass through the through channel on the side post. Therefore, the utility model discloses a lead wire of primary winding among the transformer can follow the passageway that runs through of side post and wear out, need not to draw forth in the clearance that the side post of magnetic core formed again, can make the structure of transformer compacter, is favorable to improving the power density of the switching power supply who uses the transformer. In addition, the through channel is arranged on the side column of the transformer, and heat generated in the operation of the transformer can be partially diffused to the outside of the transformer through the through channel, so that the heat dissipation capacity of the transformer can be enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 shows a schematic diagram of a prior art transformer;

fig. 2 shows a schematic diagram of a specific embodiment of the transformer of the present invention;

fig. 3 is a schematic diagram of a side column with a through channel according to an embodiment of the present invention;

fig. 4 is a schematic diagram of two side columns with through passages according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a transformer according to an embodiment of the present invention including a plurality of winding posts and a side post having a through passage;

fig. 6 is a schematic diagram of a transformer according to an embodiment of the present invention including a plurality of winding posts and two side posts having through passages;

fig. 7 shows a schematic diagram of a transformer embodiment of the present invention including a bobbin;

fig. 8 shows an exploded view of a transformer embodiment of the present invention including a bobbin;

fig. 9 shows a schematic diagram of a transformer embodiment of the present invention including a current transformer;

description of reference numerals:

11. a magnetic core 12, a primary winding 13, a secondary winding 121, a lead wire 131 and a pin;

21. magnetic core, 22, primary winding, 23, secondary winding, 221, lead, 231, pin, 211, first cover, 212, second cover, 213, winding leg, 214, side leg, 215, through channel, 216, chamfer, 24, bobbin, 25, current transformer, 201, 202, 205, 206: long side, 203, 204, 207, 208: short side.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged as appropriate in order to facilitate the embodiments of the invention described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

The positional relationship such as "parallel" or "perpendicular" includes not only the positional relationship of completely "parallel" or "perpendicular", but also the positional relationship of angular deviation from completely "parallel" or "perpendicular" within a preset deviation range.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In the prior art, as shown in fig. 1, a transformer in a switching power supply includes a magnetic core 11, a primary winding 12, and a secondary winding 13. The secondary winding 13 includes a pin 131, and the pin 131 penetrates through a gap formed by the side column of the magnetic core 11. Two ends of the primary winding 12 are respectively provided with a lead wire 121, and the lead wire 121 and a pin 131 of the secondary winding 13 both penetrate out of a gap formed by side columns of the magnetic core 11. On this basis, in order to pull the lead wire 121 of the primary winding 12 and the pin 131 of the secondary winding 13 apart by a sufficient safety distance, the lead wire 121 of the primary winding 12 that passes through the gap formed by the side legs needs to be bent and extended along the surface of the magnetic core 11 in a direction away from the secondary winding 13 after passing through. Therefore, in order to ensure the safety of the transformer, the lead 121 of the primary winding 12 needs to be led out from the side column close to the magnetic core 11, so that the primary winding 12 needs a certain lead-out space, which increases the space occupied by the transformer and is not beneficial to improving the power density. Also, the lead wire 121 of the primary winding 12 that passes through the gap formed by the side pole is at risk of interfering with other components.

Based on this, according to an aspect of the present invention, the present embodiment discloses a transformer. As shown in fig. 2, in the present embodiment, the transformer includes a magnetic core 21, a primary winding 22, and a secondary winding 23.

The magnetic core 21 includes a first cover 211, a second cover 212, a winding post 213, and at least two side posts 214, wherein the first cover 211 and the second cover 212 are respectively connected to the top surface and the bottom surface of the winding post 213 and the at least two side posts 214 of the magnetic core 21.

At least one of the side legs 214 has a through channel 215, the primary winding 22 is wound around the winding leg 213, and a lead 221 of the primary winding 22 passes through the through channel 215.

The lead 221 of the secondary winding 23 passes out of the gap formed by the at least two side legs 214.

The transformer of the present invention includes a magnetic core 21, a primary winding 22 and a secondary winding 23. The magnetic core 21 includes a first cover 211, a second cover 212, a winding post 213, and at least two side posts 214, wherein the first cover 211 and the second cover 212 are respectively connected to the top surface and the bottom surface of the winding post 213 and the at least two side posts 214 of the magnetic core 21. At least one of the side legs 214 has a through channel 215, the primary winding 22 is wound around the winding leg 213, and a lead 221 of the primary winding 22 passes through the through channel 215. The lead 221 of the secondary winding 23 exits the gap formed by the at least two side legs 214.

In the present invention, at least one side leg 214 of the magnetic core 21 of the transformer has a through passage 215. Thus, the lead 221 of the primary winding 22 in the transformer can pass out of the through channel 215 of the leg 214. Therefore, the utility model discloses a lead wire 221 of primary winding 22 among the transformer can wear out from the through channel 215 of side post 214, need not to draw forth in the clearance that the side post 214 of magnetic core 21 formed again, can make the structure of transformer compacter, is favorable to improving the power density of the switching power supply who uses the transformer. Moreover, the lead 221 of the primary winding 22 and the pin 231 of the secondary winding 23 penetrate through the space between the lead 221 and the pin 231 of the primary winding 22 from different directions, and a part of the side pillar 214 is arranged at the interval, so that the lead 221 of the primary winding 22 and the pin 231 of the secondary winding 23 can be ensured to be pulled apart by a sufficient safety distance, and the risk of interference between the lead 221 and other components is avoided to a certain extent. In addition, the through channel 215 is arranged on the side column 214 of the transformer, and the heat generated in the operation of the transformer can be partially diffused to the outside of the transformer through the through channel 215, so that the heat dissipation capability of the transformer can be enhanced.

In an alternative embodiment, the core 21 includes two side legs 214.

Specifically, it is understood that, for the purposes of implementing the outgoing line of the lead 221 of the primary winding 22 and the outgoing of the pin 231 of the secondary winding 23, and improving the heat dissipation of the transformer, etc., the magnetic core 21 of the transformer may be configured to include a first cover plate 211, a second cover plate 212, a winding post 213, and two side posts 214. The top and bottom surfaces of the winding post 213 and the two side posts 214 are connected to the first cover plate 211 and the second cover plate 212, respectively, and the two side posts are connected and supported.

In an alternative embodiment, the first cover plate 211 and the second cover plate 212 respectively include two opposite long sides and two opposite short sides.

The two side columns 214 are disposed oppositely, and are respectively connected to the first cover plate 211 and the long side corresponding to the first cover plate 211, or the two side columns 214 are disposed oppositely, and are respectively connected to the first cover plate 211 and the short side corresponding to the first cover plate 211.

In particular, it will be appreciated that the transformer is typically a cuboid. Accordingly, the first cover 211 and the second cover 212 are also provided as rectangular parallelepipeds, and the first cover 211 and the second cover 212 respectively include two opposite long sides (201, 202, 205, 206) and two opposite short sides (203, 204, 207, 208).

In order to achieve the connecting and supporting function of the side pillars 214, two side pillars 214 may be respectively disposed on two opposite short sides of the first cover plate 211 and the second cover plate 212, that is, one side pillar 214 is disposed on one short side of the first cover plate 211 and the second cover plate 212, an upper surface and a lower surface of the side pillar 214 are respectively connected with one short side 203 of the first cover plate 211 and the corresponding short side 207 of the second cover plate 212, another side pillar 214 is disposed on the other short side of the first cover plate 211 and the second cover plate 212, and an upper surface and a lower surface of the side pillar 214 are respectively connected with the other short side 204 of the first cover plate 211 and the corresponding short side 208 of the second cover plate 212.

Of course, the two side posts 214 may be disposed on two opposite long sides of the first cover 211 and the second cover 212, respectively. That is, one side pillar 214 is disposed on one long side of the first cover 211 and the second cover 212, the upper surface and the lower surface of the side pillar 214 are connected to the one long side 201 of the first cover 211 and the corresponding long side 205 of the second cover 212, respectively, the other side pillar 214 is disposed on the other long side of the first cover 211 and the second cover 212, and the upper surface and the lower surface of the side pillar 214 are connected to the other long side 202 of the first cover 211 and the corresponding long side 206 of the second cover 212, respectively.

In other embodiments, the first cover plate 211 and the second cover plate 212 may be formed in other shapes, and the side posts and the winding posts may be connected to the first cover plate 211 and the second cover plate 212 respectively to form the magnetic core, which is not limited in the present invention.

In an alternative embodiment, the two side posts 214 are provided with the through channels 215, respectively.

In particular, it will be appreciated that when the core 21 includes two side legs 214, a through passage 215 may be provided in one of the two side legs 214, as shown in fig. 3. Through channels 215 may also be provided on both side posts 214, as shown in fig. 4. When the through channels 215 are disposed on both the side legs 214, the lead wires 221 at both ends of the primary winding 22 can selectively penetrate through any one of the through channels 215 according to actual requirements, so as to improve the versatility of the magnetic core 21, and facilitate the use of the magnetic core 21 in transformers with different structures.

It should be noted that, in this embodiment, a first portion may be obtained by integrally forming a part of the winding post and the side post with the first cover plate, a second portion may be obtained by integrally forming another part of the winding post and the side post with the second cover plate, and then the first portion and the second portion are spliced to obtain the complete transformer. Of course, in other embodiments, the transformer may be obtained by a manufacturing method such as integrally connecting the first cover plate, the second cover plate, the winding post and the side post after being molded, respectively, to obtain the transformer, which is not limited by the present invention.

In an alternative embodiment, the two leads 221 of the primary winding 22 exit through the through-channel 215 of one of the two side legs 214.

Specifically, it can be understood that two lead wires 221 are led out from two ends of the primary winding 22, and the two lead wires 221 can simultaneously penetrate through the through channel 215 formed on any one of the side posts 214, so that the transformer is arranged without considering the outlet space of the primary winding 22, the space occupation of the transformer is reduced, the size of a switching power supply or other circuits provided with the transformer is favorably reduced, and the power density is improved. Of course, if the through channels 215 are formed on two or more side columns 214 according to different actual requirements, the two lead wires 221 of the primary winding 22 can also respectively penetrate through the different through channels 215, and those skilled in the art can set the through channels 215 through which the lead wires 221 penetrate according to different actual requirements, which is not limited by the present invention.

In an alternative embodiment, the primary winding 22 may comprise a plurality of first windings, and the lead 221 of each first winding extends through the same through-channel 215.

In particular, it will be appreciated that the primary winding 22 of the transformer may be configured to include a plurality of first windings and that the leg 214 having the through channel 215 may be one or more. Therefore, the lead of each primary first winding in the transformer can penetrate out of any one of the through channels 215 according to actual requirements, so that the flexibility of penetrating out of the lead 221 of the primary winding 22 of the transformer is greatly improved, and the structure of the magnetic core 21 can adapt to the arrangement of transformers with different structures.

In an alternative embodiment, the secondary winding 23 may include a plurality of secondary windings, with a leg of each secondary winding passing out of a gap formed by the core leg 214. Therefore, the pin 231 of the secondary winding 23 and the lead 221 of the primary winding 22 respectively penetrate out of the gap between the through channel 215 on the side pillar 214 and the side pillar 214, and the penetrating paths are different, so that the risk of interference between the lead of the primary winding and the pin of the secondary winding is avoided.

In an alternative embodiment, as shown in fig. 5 and 6, the winding post 213 is plural.

Specifically, it is understood that a plurality of different primary windings 22 and secondary windings 23 may be integrated in the transformer, the primary winding 22 may include a plurality of first windings, and the secondary winding 23 may include a plurality of second windings. Therefore, in one or more embodiments, the winding posts 213 may be provided in multiple numbers according to actual requirements, so as to meet the requirements for arranging transformers with different structures.

In an alternative embodiment, as shown in fig. 7 and 8, the transformer further includes a bobbin 24 sleeved on the winding post 213, and the primary winding 22 and the secondary winding 23 are wound on the bobbin 24.

In particular, it will be appreciated that in one or more embodiments, a former 24 may be disposed in the magnetic core 21 of the transformer, and the primary winding 22 and the secondary winding 23 may be wound around the former 24. The bobbin 24 is typically an insulating material, and can insulate the primary winding 22 and the secondary winding 23 from the first cover plate 211 and the second cover plate 212.

In an alternative embodiment, the side post 214 is formed with a chamfer 216 at the through passage 215.

Specifically, it will be appreciated that the lead 221 of the primary winding 22 needs to pass out of the through passage 215 of the leg 214. In this embodiment, chamfers 216 may be formed at openings at both ends of the through channel 215 of the side post 214 to prevent the through channel 215 from damaging the primary winding 22.

In an alternative embodiment, the outer surfaces of the primary winding 22 and the secondary winding 23 have an insulation layer.

Specifically, it can be understood that the primary winding 22 and the secondary winding 23 have insulation layers on their outer surfaces, so that the primary winding 22 and the secondary winding 23 can be insulated from each other, and the primary winding 22 and the secondary winding 23 can be insulated from the magnetic core 21, thereby preventing short circuit and other problems.

In an alternative embodiment, as shown in fig. 9, the transformer further includes a current transformer 25 disposed on the lead 221 of the primary winding 22 for performing functions such as protection or measurement of a circuit.

Based on the same principle, the embodiment also discloses a power module. The power module includes a transformer as described in this embodiment.

Specifically, the power module may include the transformer of this embodiment, and may further include a capacitor, a switching element, and other devices.

Because the principle of the power module for solving the problem is similar to that of the transformer, the implementation of the power module can refer to the implementation of the transformer, and details are not repeated here.

Based on the same principle, the embodiment also discloses a switching power supply. The switching power supply comprises the power module according to the embodiment.

It will be appreciated that the switching power supply may include a main circuit board on which the power module may be disposed. Optionally, the power module may be first disposed on the module circuit board, and then the module circuit board is disposed on the main circuit board to form the switching power supply, so as to dispose the power module of this embodiment in the switching power supply.

Since the principle of the switching power supply to solve the problem is similar to the above transformer, the implementation of the switching power supply can refer to the implementation of the transformer, and is not described herein again.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present invention and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A transformer is characterized by comprising a magnetic core, a primary winding and a secondary winding;

the magnetic core comprises a first cover plate, a second cover plate, a winding post and at least two side posts, wherein the first cover plate and the second cover plate are respectively connected with the winding post of the magnetic core and the top surfaces and the bottom surfaces of the at least two side posts;

at least one side column is provided with a through channel, the primary winding is wound on the winding column, and a lead of the primary winding penetrates out of the through channel;

and the lead of the secondary winding penetrates out of the gap formed by the at least two side columns.

2. The transformer of claim 1, wherein the magnetic core comprises two side legs;

the first cover plate and the second cover plate respectively comprise two opposite long sides and two opposite short sides;

the two side columns are oppositely arranged and are respectively connected with the first cover plate and the long side corresponding to the first cover plate; alternatively, the first and second liquid crystal display panels may be,

the two side columns are arranged oppositely and are respectively connected with the first cover plate and the short side corresponding to the first cover plate.

3. The transformer according to claim 2, wherein the two side legs are provided with the through channels, respectively.

4. The transformer of claim 3, wherein two leads of the primary winding exit through the through-channel of one of the two side legs.

5. The transformer of claim 1, wherein the primary winding comprises a plurality of primary windings, and wherein the leads of each primary winding extend through the same through-channel.

6. The transformer of claim 1, wherein the side legs are chamfered at the through passage.

7. The transformer of claim 1, further comprising a bobbin sleeved on the winding leg, wherein the primary winding and the secondary winding are wound around the bobbin.

8. The transformer of claim 1, further comprising a current transformer disposed on a lead of the primary winding.

9. A power module, characterized in that it comprises a transformer according to any one of claims 1-8.

10. A switching power supply, characterized by comprising a power module according to claim 9.

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