Transformer, Power Module and Switching Power Supply

The disclosure provides a transformer, a power module and a switching power supply. The transformer comprises a magnetic core, a primary side winding and a secondary side winding; the magnetic core comprises a first cover plate, a second cover plate, a winding column and at least two side columns, and at least two side columns of the magnetic core; at least one of the side columns has a through channel, the primary side winding is wound around the winding column, and a lead wire of the primary side winding passes through the through channel; the lead wire of the secondary side winding passes through a gap formed by the at least two side columns. In the disclosure, the lead wire of the primary side winding can pass through the through channel, thereby saving space and improving power density of the switching power supply.

RELATED APPLICATIONS

This application claims priority under 35 U.S.C. § 119 or 365 to China, Application No. 202210886999.9, filed Jul. 26, 2022. The entire teachings of the above application are incorporated herein by reference.

TECHNICAL FIELD

The disclosure relates to the technical field of a transformer, and in particular to a transformer, a power module and a switching power supply.

BACKGROUND

With the increasing of power density of a switching power supply, the components of the switching power supply are placed more and more compactly, and how to effectively use space is one of the important means to improve the power density. At present, as shown inFIG.1, the transformer in the switching power supply usually uses three-layer insulated wires as a primary side winding in the case of low-voltage output, and a magnetic core is placed on the side of a secondary side winding. A lead wire of the primary side winding is led out from a gap formed by a side column of the magnetic core and is pulled apart from the secondary side winding by a sufficient safety distance. In this case, the lead wire of the primary side winding is close to the outgoing wire of the side column of the magnetic core, which occupies a certain space and is not conducive to increasing the power density.

SUMMARY

An object of the present disclosure is to provide a transformer, in which a through channel is provided on a side column of a magnetic core, and a lead wire of a primary side winding can pass through the through channel, thereby saving space and improving power density of a switching power supply. It is another object of the present disclosure to provide a power module. It is a further object of the present disclosure to provide a switching power supply.

In order to achieve the above objects, an aspect of the disclosure discloses a transformer, comprising a magnetic core, a primary side winding and a secondary side winding. The magnetic core comprises a first cover plate, a second cover plate, a winding column and at least two side columns, and the first cover plate and the second cover plate are respectively connected with top and bottom surfaces of a winding column and at least two side columns of the magnetic core.

At least one of the side columns has a through channel, the primary side winding is wound around the winding column, and a lead wire of the primary side winding passes through the through channel.

The lead wire of the secondary side winding passes through a gap formed by the at least two side columns.

Alternatively, the magnetic core comprises two side columns.

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 disposed and respectively connected with the first cover plate and the corresponding long sides of the first cover plate; or the two side columns are oppositely disposed and respectively connected with the first cover plate and the corresponding short sides of the first cover plate.

Alternatively, the two side columns are respectively provided with the through channels.

Alternatively, the two lead wires of the primary side winding pass through the through channel of one of the two side columns.

Alternatively, the primary side winding comprises a plurality of first windings, and the lead wire of each first winding passes through the same through channel.

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

Alternatively, a skeleton sleeved on the winding column is further included, and the primary side winding and the secondary side winding are wound around the skeleton.

Alternatively, a current transformer arranged on the lead wire of the primary side winding is further included.

The present disclosure further discloses a power module comprising the transformer as described above.

The present disclosure further discloses a switching power supply comprising a power module as described above.

The transformer of the disclosure comprises a magnetic core, a primary side winding and a secondary side winding. Wherein, the magnetic core comprises a first cover plate, a second cover plate, a winding column and at least two side columns, and the first cover plate and the second cover plate are respectively connected with top and bottom surfaces of a winding column and at least two side columns of the magnetic core. At least one of the side columns has a through channel, the primary side winding is wound around the winding column, and a lead wire of the primary side winding passes through the through channel. The lead wire of the secondary side winding passes through a gap formed by the at least two side columns. In the present disclosure, at least one side column of the magnetic core of the transformer has a through channel. Thus, the lead wire of the primary side winding in the transformer can pass through the through channel in the side column. Therefore, the lead wire of the primary side winding in the transformer of the present disclosure can pass through the through channel of the side column without being drawn out from the gap formed by the side column of the magnetic core, so that the structure of the transformer is more compact, which is advantageous for increasing the power density of the switching power supply using the transformer. In addition, a 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 from the through channel, so that the heat dissipation capability of the transformer can be enhanced.

REFERENCE NUMERALS

DETAILED DESCRIPTION

A description of example embodiments follows.

Hereinafter the technical solution in the embodiments of the present disclosure will be described clearly and integrally in combination with the accompanying drawings in the embodiments of the present disclosure, and obviously the described embodiments are merely part of the embodiments, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments that are obtained by persons skilled in the art without making creative efforts fall within the protection scope of the present disclosure.

It should be noted that the terms “first,” “second” and the like in the description and claims of the present disclosure and in the above-mentioned drawings are used to distinguish between similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the data so used may be interchanged where appropriate for the purpose of the embodiments of the present disclosure described herein. Furthermore, the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusions, such as, for example, a process, a method, a system, a product or a device comprising a series of steps or units need not to be limited to those steps or units that are clearly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or devices.

In the present disclosure, the orientation or positional relationship indicated by the terms “on”, “under”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside”, “outside”, “middle”, “vertical”, “horizontal”, “transverse”, “longitudinal” and the like is based on the orientation or positional relationship shown in the drawings. These terms are mainly intended to better describe the present disclosure and its embodiments and are not intended to limit that the indicated devices, elements or constituents must have a particular orientation, or be constructed and operated in a particular orientation.

The positional relationship such as “parallel” or “vertical” includes not only the positional relationship of exactly “parallel” or “vertical,” but also the positional relationship that the angle deviation relative to exactly “parallel” or “vertical” is within the preset deviation range. Also, in addition to being used to represent an orientation or positional relationship, some of the above terms may also be used to indicate other meanings. For example, the term “on” may also be used in some cases to denote a certain attachment or connection. The specific meanings of these terms in the present disclosure may be understood by those ordinarily skilled in the art as the case may be.

In addition, the terms “installation”, “setting”, “being provided with”, “connecting”, “connected”, “sleeving” should be understood broadly. For example, the connection may be a fixed connection, a detachable connection or an integrated construction, or may be a mechanical connection or an electrical connection, or may be a direct connection, or may be an indirect connection through an intermediary, or an internal communication between two devices, elements or constituents. The specific meanings of the above terms in the present disclosure may be understood by those ordinarily skilled in the art as the case may be.

It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict. Hereinafter, the present disclosure will be described in detail with reference to the drawings and in connection with embodiments.

In the prior art, as shown inFIG.1, the transformer in the switching power supply includes a magnetic core11, a primary side winding12and a secondary side winding13. Wherein, the secondary side winding13includes a pin131extending out of a gap formed by a side column of the magnetic core11. Both ends of the primary side winding12are respectively lead wires121, and the lead wires121and the pin131of the secondary side winding13pass through a gap formed by the side column of the magnetic core11. On this basis, in order to separate the lead wire121of the primary side winding12from the pin131of the secondary side winding13by a sufficient safety distance, the lead wire121, which is required to pass through the primary side winding12out of the gap formed by the side column, is bent and extends along the surface of the magnetic core11in the direction away from the secondary side winding13after it passes through. Therefore, in order to ensure the safety of the transformer, it is necessary to make the lead wire121of the primary side winding12exit from the side column near the magnetic core11, such that the primary side winding12needs a certain outgoing space, which increases the space occupied by the transformer and is not conducive to increasing the power density. In addition, there is also a risk that the lead wire121of the primary side winding12passing through the gap formed by the side column interferes with other components. Based on this, according to an aspect of the present disclosure, the present embodiment discloses a transformer. As shown inFIG.2, in the embodiment, the transformer includes a magnetic core21, a primary side winding22and a secondary side winding23.

Wherein, the magnetic core21includes a first cover plate211, a second cover plate212, a winding column213, and at least two side columns214. The first cover plate211and the second cover plate212are respectively connected to top and bottom surfaces of the winding column213and the at least two side columns214of the magnetic core21.

At least one of the side columns214has a through channel215, the primary side winding22is wound around the winding column213, and a lead wire221of the primary side winding22passes through the through channel215.

The lead wire221of the secondary side winding23passes through a gap formed by the at least two side columns214.

The transformer of the disclosure comprises a magnetic core21, a primary side winding22and a secondary side winding23. Wherein, the magnetic core21includes a first cover plate211, a second cover plate212, a winding column213, and at least two side columns214. The first cover plate211and the second cover plate212are respectively connected to top and bottom surfaces of the winding column213and the at least two side columns214of the magnetic core21. At least one of the side columns214has a through channel215, the primary side winding22is wound around the winding column213, and a lead wire221of the primary side winding22passes through the through channel215. The lead wire221of the secondary side winding23passes through a gap formed by the at least two side columns214.

In the present disclosure, at least one side column214of the magnetic core21of the transformer has a through channel215. Thus, the lead wire221of the primary side winding22in the transformer can pass through the through channel215in the side column214. Therefore, the lead wire221of the primary side winding22in the transformer of the present disclosure can pass through the through channel215of the side column214without being drawn out from the gap formed by the side column214of the magnetic core21, so that the structure of the transformer is more compact, which is advantageous for increasing the power density of the switching power supply using the transformer. In addition, the lead wire221of the primary side winding22and the pin231of the secondary side winding23pass through from different directions and are separated by part of the side column214, which can ensure that the lead wire221of the primary side winding22is separated from the pin231of the secondary side winding23by a sufficient safety distance, and to some extent, the risk that the lead wire221interferes with other components is also avoided. In addition, a through channel215is arranged on the side column214of the transformer, and heat generated in the operation of the transformer can be partially diffused to the outside of the transformer from the through channel215, so that the heat dissipation capability of the transformer can be enhanced.

In an alternative embodiment, the magnetic core21includes two side columns214. Specifically, it can be understood that, in order to realize purposes of the outgoing of the lead wire221of the primary side winding22and the outgoing of the pin231of the secondary side winding23, and to improve the heat dissipation of the transformer, the magnetic core21of the transformer includes a first cover plate211, a second cover plate212, a winding column213, and two side columns214. The top and bottom surfaces of the winding column213and the two side columns214are connected to the first cover plate211and the second cover plate212, respectively, and the two side columns serve as connecting and supporting functions. In an alternative embodiment, the first cover plate211and the second cover plate212respectively comprise two opposite long sides and two opposite short sides.

Wherein, the two side columns214are oppositely disposed, and are respectively connected to the first cover plate211and the corresponding long sides of the first cover plate211; or the two side columns214are oppositely disposed, and are respectively connected to the first cover plate211and the corresponding short sides of the first cover plate211.

Specifically, it will be appreciated that the transformer is generally a rectangular parallelepiped. Accordingly, the first cover plate211and the second cover plate212are also configured as rectangular parallelepipeds, and the first cover plate211and the second cover plate212include opposite two long sides (201,202,205,206) and opposite two short sides (203,204,207,208), respectively.

In order to realize the connecting and supporting functions of the side columns214, the two side columns214may be disposed at two opposite short sides of the first cover plate211and the second cover plate212, respectively. That is, one side column214is arranged at one short side of the first cover plate211and the second cover plate212, and upper and lower surfaces of the side column214are connected to one short side203of the first cover plate211and the corresponding short side207of the second cover plate212, respectively, the other side column214is arranged at the other short side of the first cover plate211and the second cover plate212, and upper and lower surfaces of the side column214are connected to the other short side204of the first cover plate211and the corresponding short side208of the second cover plate212, respectively.

Of course, the two side columns214may also be respectively disposed on the two opposite long sides of the first cover plate211and the second cover plate212. That is, one side column214is arranged at one long side of the first cover plate211and the second cover plate212, and upper and lower surfaces of the side column214are connected to one long side201of the first cover plate211and the corresponding long side205of the second cover plate212, respectively; the other side column214is arranged at the other long side of the first cover plate211and the second cover plate212, and upper and lower surfaces of the side column214are connected to the other long side202of the first cover plate211and the corresponding long side206of the second cover plate212, respectively.

It should be noted that in other embodiments, the first cover plate211and the second cover plate212can also be set to other shapes, as long as the side column and the winding column can be connected to the first cover plate211and the second cover plate212respectively to form the magnetic core, and the present disclosure is not limited thereto.

In an alternative embodiment, the two side columns214are respectively provided with the through channels215.

Specifically, it can be understood that when the magnetic core21includes two side columns214, a through channel215may be provided in one of the two side columns214, as shown inFIG.3. It is also possible to provide through channels215in both of the side columns214, as shown inFIG.4. When the two side columns214are both provided with the through channels215, the lead wires221at both ends of the primary side winding22can pass through any of the through channels215according to actual requirements, thereby improving the versatility of the magnetic core21, which is convenient for the magnetic core21to be used in transformers of different configurations.

It should be noted that in the embodiment, a part of the winding column and the side column can be formed integrally with the first cover plate to obtain a first portion, the other part of the winding column and the side column is formed integrally with the second cover plate to obtain a second portion, and then the first portion and the second portion are spliced to obtain a complete transformer. Of course, in other embodiments, the transformer can also be obtained by forming the first cover plate, the second cover plate, the winding column and the side column respectively and then connecting them integrally, and other production methods, which are not limited in the present disclosure.

In an alternative embodiment, the two lead wires221of the primary side winding22pass through the through channel215of one of the two side columns214.

Specifically, it can be understood that two lead wires221are led out from both ends of the primary side winding22. The two lead wires221can simultaneously pass through the through channel215formed in any one of the side columns214, thus it is not necessary to consider the outlet space of the primary side winding22in the arrangement of the transformer, which reduces the space occupation of the transformer, is advantageous in reducing the volume of the switching power supply or other circuits provided with the transformer, and improves the power density. Of course, according to different actual requirements, if two or more side columns214are formed with the through channels215, the two lead wires221of the primary side winding22can also respectively pass through different through channels215, and the through channels215through which the lead wires221pass can be set by those skilled in the art according to different actual requirements, which is not limited in the present disclosure. In an alternative embodiment, the primary side winding22comprises a plurality of first windings, and the lead wire221of each first winding passes through the same through channel215.

Specifically, it is understood that the primary side winding22in the transformer may be configured to include a plurality of first windings, and there may be one or more side columns214provided with the through channels215. Accordingly, the lead wire of each primary first winding in the transformer can pass through any one of the through channels215according to actual requirements, which greatly improves the flexibility of the lead wires221of the primary side winding22of the transformer to pass through, so that the structure of the magnetic core21can be adapted to the arrangement of the transformer with different structures.

In an alternative embodiment, the secondary side winding23may include a plurality of second windings each having a pin extending through a gap formed by the side column214of the magnetic core. Therefore, the pin231of the secondary side winding23and the lead wire221of the primary side winding22respectively pass through the through channel215on the side columns214and the gap between the side columns214, in different passing paths, thereby avoiding the risk of interference between the lead wire of the primary side winding and the pin of the secondary side winding.

In an alternative embodiment, as shown inFIGS.5and6, the winding column213may be in plural.

Specifically, it can be understood that a plurality of different primary side windings22and secondary side windings23may be integrated in the transformer. The primary side windings22may include a plurality of first windings, and the secondary side winding23may include a plurality of second windings. Therefore, in one or more embodiments, according to actual requirements, the winding column213can be configured in plural to meet the configuration requirements of transformers with different structures.

In an alternative embodiment, as shown inFIGS.7and8, the transformer further includes a skeleton24sleeved on the winding column213, and the primary side winding22and the secondary side winding23are wound around the skeleton24.

Specifically, it can be understood that in one or more embodiments, the skeleton24may be disposed in the magnetic core21of the transformer, and the primary side winding22and the secondary side winding23may be wound around the skeleton24. The skeleton24is generally of an insulating material, and can insulate the primary side winding22and the secondary side winding23from the first cover plate211and the second cover plate212.

In an alternative embodiment, a chamfer216is formed at the through channel215of the side column214.

Specifically, it can be understood that the lead wire221of the primary side winding22needs to pass through the through channel215in the side column214. In this embodiment, chamfers216may be formed at openings of both ends of the through channel215of the side column214to prevent the through channel215from damaging the primary side winding22. In an alternative embodiment, outer surface of the primary side winding22and the secondary side winding23is provided with an insulating layer.

Specifically, it can be understood that the outer surface of the primary side winding22and the secondary side winding23is provided with an insulating layer, which can insulate the primary side winding22and the secondary side winding23from each other, and can also insulate the primary side winding22and the secondary side winding23from the magnetic core21, thereby preventing problems such as a short circuit from occurring.

In an alternative embodiment, as shown inFIG.9, the transformer further includes a current transformer25arranged on the lead wire221of the primary side winding22, to realize functions such as protection or measurement of the circuit.

Based on the same principle, this embodiment further discloses a power module. The power module includes the 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.

Since the power module solves the problem in accordance with the principle similar to that of the transformer described above, the implementation of the power module may be found by referring to the implementation of the transformer, and is not repeated herein.

Based on the same principle, this embodiment further discloses a switching power supply. The switching power supply includes a power module as described in this embodiment.

It can be appreciated that the switching power supply may include a main circuit board on which a power module may be provided. Alternatively, 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 that the power module of this embodiment is disposed in the switching power supply.

Since the switching power supply solves the problem in accordance with the principle similar to that of the transformer described above, the implementation of the switching power supply may be found by referring to the implementation of the transformer, and is not repeated herein.

The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system embodiment is simply described since it is substantially similar to the method embodiment, and please refer to the description of the method embodiment for the relevant content.

The above description is merely an embodiment of the present disclosure, and is not intended to limit the present disclosure. Various modifications and variations may be made to the present disclosure by those skilled in the art. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the present disclosure are intended to be included within the scope of the claims of the present disclosure.