CN219123084U

CN219123084U - Integrated transformer and power supply device

Info

Publication number: CN219123084U
Application number: CN202223107583.7U
Authority: CN
Inventors: 廖忠明
Original assignee: Anker Innovations Co Ltd
Current assignee: Anker Innovations Co Ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-06-02
Anticipated expiration: 2032-11-22

Abstract

The utility model discloses an integrated transformer and a power supply device, wherein the integrated transformer comprises a magnetic core, a first framework, a second framework, a first winding and a second winding; the magnetic core is provided with a first middle column and a second middle column which are arranged at intervals, the first framework is arranged on the first middle column, the second framework is arranged on the second middle column, the first winding is wound on the first framework, and the second winding is wound on the second framework; the power supply device comprises the integrated transformer. The first framework, the first winding and the first center pillar are used as one transformer, the second framework, the second winding and the second center pillar are used as another transformer or one inductor, and therefore the integrated arrangement of the two transformers or the one transformer and the one inductor is realized; compared with the independent setting, the integration level is improved, the volume occupation is reduced, and the power density is also improved.

Description

Integrated transformer and power supply device

Technical Field

The present utility model relates to the field of transformers, and in particular, to an integrated transformer and a power supply device.

Background

A Transformer (Transformer) is a device for changing an ac voltage using an electromagnetic induction principle, which can be mounted on a circuit board by means of a mounting method (SMD) to realize a line voltage changing function of the circuit board.

If a plurality of transformers or other winding devices are attached to the circuit board, a large amount of precious space is occupied, the power density is low, and the development requirements of miniaturization and high power density of the current product are difficult to meet.

Disclosure of Invention

Based on this, it is necessary to provide an integrated transformer and power supply device for the problem that the space occupied by the conventional transformers is large; the integrated transformer has small occupied space.

The technical scheme is as follows:

in one aspect, an integrated transformer is provided, comprising:

the magnetic core is provided with a first middle post and a second middle post, and the first middle post and the second middle post are arranged at intervals;

the first framework is arranged on the first center column, and the second framework is arranged on the second center column;

the first winding is wound on the first framework, and the second winding is wound on the second framework.

The integrated transformer comprises a first framework, a first winding and a first center pillar, wherein the first framework, the first winding and the first center pillar are used as one transformer, and the second framework, the second winding and the second center pillar are used as another transformer or one inductor, so that the integrated arrangement of the two transformers or one transformer and one inductor is realized; compared with the independent setting, the integration level is improved, the volume occupation is reduced, and the power density is also improved.

The technical scheme is further described as follows:

in one embodiment, the first framework is provided with a first limiting portion, the second framework is provided with a second limiting portion, and the second limiting portion is in limiting fit with the first limiting portion.

In one embodiment, one of the first limiting portion and the second limiting portion is a protruding portion structure, and the other of the first limiting portion and the second limiting portion is a groove structure, and the groove structure is disposed corresponding to the protruding portion structure.

In one embodiment, the first skeleton has a first winding part, a first end part and a second end part, the first end part and the second end part are respectively positioned at two opposite ends of the first winding part, so that the outer periphery of the first winding part forms a first winding space, and the first winding is wound on the first winding part through the first winding space;

the second framework is provided with a second winding part, a third end part and a fourth end part, wherein the third end part and the fourth end part are respectively positioned at two opposite ends of the second winding part, so that the periphery of the second winding part forms a second winding space, and the second winding is wound on the second winding part through the second winding space.

In one embodiment, at least one of the first end portion and the second end portion is provided with the first limiting portion, at least one of the third end portion and the fourth end portion is provided with the second limiting portion, and a position of the second limiting portion corresponds to a position of the first limiting portion.

In one embodiment, the first winding part is provided with a first assembly hole, the first assembly hole is arranged corresponding to the first center pillar, and the first framework is sleeved on the first center pillar through the first assembly hole;

the second winding part is provided with a second assembly hole, the second assembly hole is correspondingly arranged with the second center pillar, and the second framework is sleeved on the second center pillar through the second assembly hole.

In one embodiment, the axis of the first center pillar is parallel to the axis of the second center pillar, and the plane perpendicular to the axis of the first center pillar is a first plane; the cross-sectional shape of the first center pillar on the first plane is different from the cross-sectional shape of the second center pillar on the first plane, or/and the cross-sectional area of the first center pillar on the first plane is different from the cross-sectional area of the second center pillar on the first plane.

In one embodiment, the magnetic core further has a base, a first leg, and a second leg, the first leg, the second leg, the first center leg, and the second center leg all being located on a same side of the base; the first side column and the second side column are respectively positioned at two opposite ends of the base, and the first middle column and the second middle column are positioned between the first side column and the second side column;

the height of the first middle column and the height of the second middle column are smaller than the height of the first side column; or/and the height of the first middle column and the height of the second middle column are smaller than the height of the second side column.

In one embodiment, the height of the first center pillar is different from the height of the second center pillar;

the first winding and the second winding are both transformer windings; or/and the first winding is a transformer winding, and the second winding is an inductance winding.

In one embodiment, the magnetic core further has a separation post disposed on the base between the first leg and the second leg;

a first space is formed between the first side column and the separation column, and the first middle column, the first framework and the first winding are all located in the first space;

and a second space is formed between the second side column and the separation column, and the second middle column, the second framework and the second winding are all positioned in the second space.

On the other hand, still provide a power supply unit, include the integrated transformer of arbitrary technical scheme as above.

The power supply device adopts the integrated transformer, the first framework, the first winding and the first center pillar are used as one transformer, the second framework, the second winding and the second center pillar are used as another transformer or one inductor, and therefore the integrated arrangement of the two transformers or one transformer and one inductor is realized; compared with the independent setting, the integration level is improved, the volume occupation is reduced, and the power density is also improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

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

Moreover, the figures are not drawn to a 1:1 scale, and the relative sizes of various elements are merely exemplary in the figures, and are not necessarily drawn to true scale.

FIG. 1 is a schematic view illustrating an assembly of a first frame and a second frame according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of a limit fit of a first frame and a second frame in an embodiment;

FIG. 3 is a schematic diagram illustrating a limit fit of a first frame and a second frame in another embodiment;

FIG. 4 is a side view of a first frame and a second frame according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of the overall structure of a magnetic core in one embodiment;

fig. 6 is a top view of a magnetic core according to another embodiment.

The drawings are marked with the following description:

100. a magnetic core; 101. a first space; 102. a second space; 110. a first center pillar; 120. a second center pillar; 130. a first side column; 140. a second side column; 150. a partition column; 160. a base; 210. a first skeleton; 211. a first winding part; 2111. a first winding space; 2112. a first fitting hole; 212. a first end; 2121. a first pin needle; 213. a second end; 214. a first limit part; 220. a second skeleton; 221. a second winding part; 2211. a second winding space; 2212. a second fitting hole; 222. a third end; 2221. a second pin needle; 223. a fourth end; 224. and a second limiting part.

Detailed Description

Embodiments of the present utility model will be described in detail below with reference to the attached drawings:

in order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

As shown in fig. 1 to 4, an embodiment of the present application provides an integrated transformer including a magnetic core 100, a first bobbin 210, a second bobbin 220, a first winding, and a second winding. The integrated transformer can be applied to power supply devices with miniaturization and high power density requirements, for example, the integrated transformer is arranged on a circuit board of the power supply device in an SMD mounting mode, so that the internal space of the power supply device can be fully utilized on the premise of not affecting specifications. Wherein:

as shown in fig. 5 and 6, the magnetic core 100 has a first center leg 110 and a second center leg 120, and the first center leg 110 and the second center leg 120 are spaced apart.

In the embodiment shown in fig. 5 and 6, the first middle post 110 and the second middle post 120 are each provided in an elliptical post shape with a space therebetween to reserve the space occupied by the frame and the windings.

The first frame 210 is provided on the first center pillar 110, and the second frame 220 is provided on the second center pillar 120.

Alternatively, the first framework 210 may be sleeved on the first middle column 110, or may be clamped on the first middle column 110; the second armature 220 and the second center pillar 120 are similarly arranged.

The first winding is wound around the first bobbin 210 and the second winding is wound around the second bobbin 220.

The first bobbin 210 is used for winding a first winding to form a transformer or an inductor; the second bobbin 220 is used to wind the second winding to form another transformer or inductor, thereby integrating two transformers or transformers with the inductor on the magnetic core 100.

The first winding and the second winding form two coils, the first winding is arranged on the first center pillar 110 through the first framework 210, and the second winding is arranged on the second center pillar 120 through the second framework 220, so that a magnetic integrated structure of a common magnetic circuit is formed.

The integrated transformer, the first skeleton 210, the first winding and the first middle column 110 are used as one transformer, the second skeleton 220, the second winding and the second middle column 120 are used as another transformer or one inductor, and thus the integrated arrangement of two transformers or one transformer and one inductor is realized; compared with the independent setting, the integration level is improved, the volume occupation is reduced, and the power density is also improved.

In other embodiments, the magnetic core 100 further has a third middle post, the third middle post is spaced from the first middle post 110 and the second middle post 120, the integrated transformer is further provided with a third framework and a third winding, the third framework is arranged on the third middle post, and the third winding is wound on the third framework. The three-phase transformer is arranged in such a way that the integrated arrangement of the three windings is realized, namely, three transformers or the combination of the transformers and the inductors can be integrated, so that precious installation space is saved. Of course, integration of four or five windings can be realized as needed, and detailed description is omitted.

Optionally, the winding direction of the first winding is the same as the winding direction of the second winding.

Optionally, referring to fig. 1 and 4, a first pin 2121 is provided on the first skeleton 210, where the first pin 2121 is configured to communicate with the first winding so as to connect the first winding with an associated circuit of the circuit board. The second skeleton 220 is provided with a second pin needle 2221, and the second pin needle 2221 is used for communicating with the second winding so as to enable the second winding to communicate with related circuits of the circuit board.

Optionally, as shown in fig. 1 and fig. 4, at least two first pin needles 2121 are provided, at least two second pin needles 2221 are provided, and the number of second pin needles 2221 may be the same as or different from the number of first pin needles 2121, so as to meet the actual line connection needs.

In one embodiment, referring to fig. 2 and 3, the first frame 210 is provided with a first limiting portion 214, the second frame 220 is provided with a second limiting portion 224, and the second limiting portion 224 is in limiting fit with the first limiting portion 214.

The first skeleton 210 and the second skeleton 220 are in limit fit, so that the first skeleton 210 and the second skeleton 220 are arranged in a modularized and integrated mode, assembly is convenient, the relative positions of the first skeleton and the second skeleton are prevented from being changed after the first skeleton and the second skeleton are arranged on the magnetic core 100, the structural stability of the whole integrated transformer is improved, and normal operation of the transformer is ensured.

In one embodiment, referring to fig. 2 and 3, one of the first limiting portion 214 and the second limiting portion 224 is a protrusion structure, and the other one of the first limiting portion 214 and the second limiting portion 224 is a groove structure, and the groove structure is disposed corresponding to the protrusion structure.

Through the arrangement of the convex structure and the groove structure, the first framework 210 and the second framework 220 are correspondingly meshed together, so that stable assembly of the structure is realized.

Alternatively, the first and second limiting

portions

214 and 224 may be mortise and tenon structures.

In the embodiment shown in fig. 2, the first skeleton 210 is provided with a first limiting portion 214, and the first limiting portion 214 is a substantially rectangular notch; the second skeleton 220 is provided with a second limiting portion 224, and the second limiting portion 224 is a rectangular protruding block matched with the rectangular notch. So set up, through the interlock of rectangle notch and rectangle lug when first skeleton 210 and second skeleton 220 assembly, ensure that the assembly of structure is firm.

In the embodiment shown in fig. 3, the first skeleton 210 is provided with a first limiting portion 214, and the first limiting portion 214 is a generally trapezoidal bump; the second skeleton 220 is provided with a second limiting portion 224, and the second limiting portion 224 is a trapezoid notch matched with the trapezoid bump. So set up, through the interlock of trapezoidal lug and trapezoidal notch when first skeleton 210 and second skeleton 220 assembly, ensure that the assembly of structure is firm. Of course, it should be noted that, in the implementation case shown in fig. 3, for convenience of assembly, the trapezoid slot should be disposed through the second frame 220, so that the trapezoid bump slides in along the through direction of the trapezoid slot, which is not described herein.

In one embodiment, as shown in fig. 1 and 4, the first bobbin 210 has a first winding portion 211, a first end portion 212 and a second end portion 213, the first end portion 212 and the second end portion 213 being located at opposite ends of the first winding portion 211, respectively, such that the outer circumference of the first winding portion 211 forms a first winding space 2111, and the first winding is wound on the first winding portion 211 through the first winding space 2111.

In one embodiment, as shown in fig. 1 and 4, the second bobbin 220 has a second winding portion 221, a third end portion 222 and a fourth end portion 223, and the third end portion 222 and the fourth end portion 223 are respectively located at opposite ends of the second winding portion 221, so that the outer circumference of the second winding portion 221 forms a second winding space 2211, and the second winding is wound on the second winding portion 221 through the second winding space 2211.

In connection with the embodiment shown in fig. 1 and 4, the first winding portion 211 is substantially cylindrical, and the first end 212 and the second end 213 are respectively located at opposite ends of the first winding portion 211, so as to form a ring-shaped first winding space 2111 at an outer periphery of the first winding portion 211, thereby enabling the first winding to be wound through the first winding space 2111.

Similarly, in the embodiment shown in fig. 1 and 4, the second winding portion 221 is substantially columnar, and the third end 222 and the fourth end 223 are respectively located at two opposite ends of the second winding portion 221, so as to form a ring-shaped second winding space 2211 at the outer periphery of the second winding portion 221, so that the second winding is wound through the second winding space 2211.

Optionally, the first winding portion 211, the first end portion 212 and the second end portion 213 are integrally formed, and the structural stability is higher. The second winding part 221, the third end part 222 and the fourth end part 223 are integrated, and the stability of the structure is higher.

In one embodiment, at least one of the first end 212 and the second end 213 is provided with a first stop 214, at least one of the third end 222 and the fourth end 223 is provided with a second stop 224, and the position of the second stop 224 corresponds to the position of the first stop 214.

By the arrangement, the first framework 210 and the second framework 220 can have a better limiting effect, and the assembly stability of the first framework 210 and the second framework 220 is ensured.

For example, the first end 212 and the second end 213 are provided with a first limiting portion 214, and the third end 222 and the fourth end 223 are provided with a second limiting portion 224, so that each portion of the first frame 210 and the second frame 220 is engaged, thereby achieving a better assembly stability effect.

In one embodiment, referring to fig. 1, the first winding portion 211 is provided with a first assembling hole 2112, the first assembling hole 2112 is disposed corresponding to the first middle post 110, and the first skeleton 210 is sleeved on the first middle post 110 through the first assembling hole 2112.

In one embodiment, referring to fig. 1, the second winding portion 221 is provided with a second assembling hole 2212, the second assembling hole 2212 is disposed corresponding to the second middle post 120, and the second skeleton 220 is sleeved on the second middle post 120 through the second assembling hole 2212.

The first fitting hole 2112 is for fitting the first backbone 210 over the first center pillar 110, and the second fitting hole 2212 is for fitting the second backbone 220 over the second center pillar 120, for ease of assembly.

Alternatively, the first and second

fitting holes

2112 and 2212 are through holes. For example, in the embodiment shown in fig. 1, the first fitting hole 2112 is provided through the first winding portion 211, and the second fitting hole 2212 is provided through the second winding portion 221.

In one embodiment, referring to fig. 1, 5 and 6, the axis of the first center pillar 110 is parallel to the axis of the second center pillar 120, and the plane perpendicular to the axis of the first center pillar 110 is a first plane; the cross-sectional shape of the first center pillar 110 in the first plane is different from the cross-sectional shape of the second center pillar 120 in the first plane, or/and the cross-sectional area of the first center pillar 110 in the first plane is different from the cross-sectional area of the second center pillar 120 in the first plane.

Alternatively, the first and second center posts 110, 120 have the same cross-sectional shape but different cross-sectional areas to accommodate different gauges of skeletons.

As shown in fig. 5, the first middle column 110 and the second middle column 120 are both arranged in an elliptical shape, and the size of the first middle column 110 is different from the size of the second middle column 120, so that the cross-sectional area of the first middle column 110 is different from the cross-sectional area of the second middle column 120 to adapt to skeletons of different specifications.

Optionally, the cross-sectional shapes of the first and second center posts 110, 120 are different, but the cross-sectional areas are the same or different to accommodate different gauges of skeletons.

In one embodiment, referring to fig. 5 and 6, the magnetic core 100 further includes a base 160, a first side pillar 130 and a second side pillar 140, where the first side pillar 130, the second side pillar 140, the first middle pillar 110 and the second middle pillar 120 are all located on the same side of the base 160; the first side column 130 and the second side column 140 are respectively located at opposite ends of the base 160, and the first middle column 110 and the second middle column 120 are each located between the first side column 130 and the second side column 140.

The first leg 130 and the second leg 140 serve to isolate and protect the first winding and the second winding from contact with other components.

Optionally, the first side post 130, the second side post 140, the first middle post 110, and the second middle post 120 are all disposed perpendicular to the base 160.

In one embodiment, the height of the first center pillar 110 and the height of the second center pillar 120 are both less than the height of the first side pillar 130. The height of the first center pillar 110 and the height of the second center pillar 120 are both smaller than the height of the second side pillar 140.

The first and second center posts 110 and 120 are each lower than the first or second side posts 130 or 140 in the height direction. When the other core is symmetrically disposed on the core 100, a gap can be formed between the first and second center posts 110 and 120 and the other core, and the gap can be used as an air gap.

For example, the heights of the first side column 130 and the second side column 140 are equal, and the heights of the first middle column 110 and the second middle column 120 are lower than the height of the first side column 130; or the height of the first side column 130 is greater than the height of the second side column 140, and the height of the first middle column 110 and the height of the second middle column 120 are both lower than the height of the second side column 140; or the height of the first side column 130 is smaller than the height of the second side column 140, and the height of the first middle column 110 and the height of the second middle column 120 are both lower than the height of the first side column 130.

In one embodiment, the height of the first center pillar 110 is different from the height of the second center pillar 120.

The height of the first center pillar 110 and the height of the second center pillar 120 may be the same or different to match the actual conditions of the first winding and the second winding. If the difference between the height of the middle column and the height of the side column is large, a sectional air gap mode is adopted.

For example, if the height of the first leg 130 and the height of the second leg 140 are both 5mm, the height of the first middle leg 110 is 4.8mm, and the height of the second middle leg 120 is 3mm, the space between the second middle leg 120 and the other magnetic core is too large, and at this time, the filler is disposed between the second middle leg 120 and the other magnetic core, so as to form an air gap between the first middle leg 110 and the filler and an air gap between the filler and the other magnetic core, which is a segmented air gap mode; and the air gap between the first center pillar 110 and the other core is a single-segment air gap.

In one embodiment, the first winding and the second winding are both transformer windings.

In this case, two transformers are integrated into one transformer.

In one embodiment, the first winding is a transformer winding and the second winding is an inductor winding.

In this case, a transformer and an inductor are integrally provided.

Alternatively, the inductive winding may be a PFC winding (Power Factor Correction).

In one embodiment, referring to fig. 6, the magnetic core 100 further has a separation post 150, where the separation post 150 is disposed on the base 160 and located between the first side post 130 and the second side post 140. A first space 101 is formed between the first leg 130 and the partition column 150, and the first center pillar 110, the first bobbin 210, and the first winding are all located in the first space 101. A second space 102 is formed between the second leg 140 and the partition 150, and the second center leg 120, the second bobbin 220, and the second winding are all located in the second space 102.

In connection with the embodiment shown in fig. 1 and 6, the base 160 is further provided with a separation column 150, and both sides of the separation column 150 are respectively provided with a first winding and a second winding. By providing the separation columns 150, on the one hand, the effective cross-sectional area of the magnetic core 100 is increased, and on the other hand, the magnetic density can be reduced, so that the working temperature is reduced, and the normal working is ensured.

Referring to fig. 1 and 6, the contour of the first leg 130 and the contour of the division post 150 correspond to the contour of the first bobbin 210 to play a role in the assembly limit of the first bobbin 210 and the first winding.

In addition, a power supply device is provided, which comprises the integrated transformer according to any one of the embodiments.

The power supply device adopts the integrated transformer, the first framework 210, the first winding and the first middle column 110 are used as one transformer, the second framework 220, the second winding and the second middle column 120 are used as another transformer or one inductor, and further the integrated arrangement of the two transformers or one transformer and one inductor is realized; compared with the independent setting, the integration level is improved, the volume occupation is reduced, and the power density is also improved.

For example, by integrating the magnetic core 100, the first framework 210, the second framework 220, the first winding and the second winding, and applying the integrated structure to a flyback circuit of a two-way AC/DC, the volume of the transformer is reduced by 20% compared with the traditional case without affecting the original specification, the whole volume of the power supply device is reduced by 10%, and the power density is improved by 0.1W/cm ³ Thereby realizing the miniaturization and high power density design of the product.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An integrated transformer, comprising:

2. The integrated transformer of claim 1, wherein the first frame is provided with a first stop portion, the second frame is provided with a second stop portion, and the second stop portion is in stop fit with the first stop portion.

3. The integrated transformer of claim 2, wherein one of the first and second limiting portions is a protrusion structure, and the other of the first and second limiting portions is a groove structure, the groove structure being disposed corresponding to the protrusion structure.

4. The integrated transformer of claim 2, wherein the first bobbin has a first winding portion, a first end portion, and a second end portion, the first end portion and the second end portion being located at opposite ends of the first winding portion, respectively, such that an outer periphery of the first winding portion forms a first winding space through which the first winding is wound on the first winding portion;

5. The integrated transformer of claim 4, wherein at least one of the first end portion and the second end portion is provided with the first limit portion, and at least one of the third end portion and the fourth end portion is provided with the second limit portion, and a position of the second limit portion corresponds to a position of the first limit portion.

6. The integrated transformer of claim 4, wherein the first winding portion is provided with a first assembly hole, the first assembly hole is arranged corresponding to the first center post, and the first framework is sleeved on the first center post through the first assembly hole;

7. The integrated transformer of claim 6, wherein the axis of the first center post is parallel to the axis of the second center post and the plane perpendicular to the axis of the first center post is a first plane; the cross-sectional shape of the first center pillar on the first plane is different from the cross-sectional shape of the second center pillar on the first plane, or/and the cross-sectional area of the first center pillar on the first plane is different from the cross-sectional area of the second center pillar on the first plane.

8. The integrated transformer of claim 4, wherein the magnetic core further has a base, a first leg, and a second leg, the first leg, the second leg, the first leg, and the second leg all being on a same side of the base; the first side column and the second side column are respectively positioned at two opposite ends of the base, and the first middle column and the second middle column are positioned between the first side column and the second side column;

9. The integrated transformer of claim 8, wherein the height of the first center post is different from the height of the second center post;

10. The integrated transformer of claim 8, wherein the magnetic core further has a separation post disposed on the base between the first leg and the second leg;

11. A power supply device comprising an integrated transformer as claimed in any one of claims 1-10.