CN215069588U - Transformer framework, horizontal transformer and power supply - Google Patents

Abstract

The utility model relates to a transformer technical field, concretely relates to skeleton of transformer, horizontal transformer and power, skeleton of transformer includes wire winding seat and two sets of stitch seat, the wire winding seat is including holding the well shaft hole that the magnetic core axis penetrated, the both sides of wire winding seat are equipped with a set of stitch seat, every group respectively a plurality of stitches of having arranged on the stitch seat, a plurality ofly on every group stitch seat the direction of arranging of stitch with the axis direction in well shaft hole is parallel, forms the installation space that forms the magnetic core between two sets of stitch seats. The utility model provides a pair of transformer skeleton, horizontal transformer and power can make magnetic core and shell bottom plate contact, realizes the conduction heat dissipation, improves horizontal transformer's heat dispersion, carries out the vortex through the magnetic core simultaneously and shields, stops the loss that the vortex brought and generates heat, further improves transformer efficiency.

Description

Transformer framework, horizontal transformer and power supply

Technical Field

The utility model relates to a transformer technical field, concretely relates to transformer skeleton, horizontal transformer and power.

Background

The high-frequency transformer is a power transformer with the working frequency exceeding the intermediate frequency, is mainly used for a high-frequency switching power supply, and is the most main component of the high-frequency switching power supply. The high-frequency transformer mainly comprises a framework, a magnetic core, a primary coil and a secondary coil, wherein when alternating current is conducted in the primary coil, alternating current magnetic flux is generated in the magnetic core, and current is induced in the secondary coil.

The high frequency transformer is generally mounted on a circuit board and electrically connected to the circuit board through pins, and the high frequency transformer may be classified into a horizontal high frequency transformer and a vertical high frequency transformer according to a mounting manner.

Fig. 1 to 4 show a specific structure and installation manner of a horizontal high-frequency transformer in the prior art, and the horizontal transformer 2' has the following problems:

1. in the structural aspect: the transformer framework 1 'is provided with a middle shaft hole 111' for allowing a middle shaft of the magnetic core to penetrate, the axial direction of the middle shaft hole 111 'is vertical to the length direction (namely the arrangement direction of pins 121'), the pin bases 12 'are arranged at two ends of the framework, after the primary coil 22' and the secondary coil 23 'are wound on the transformer framework 1' and the magnetic core 21 'is arranged in the transformer framework to manufacture a finished transformer, a closed-loop magnetic circuit plane formed by the magnetic core is parallel to a mounting surface (namely the upper plane of the circuit board 31') of the transformer, a certain gap exists between the magnetic core 21 'and the shell bottom plate 32', heat generated by the transformer during working can only be firstly radiated into surrounding air and then radiated in a self-cooling or air-cooling mode, and the heat radiation effect is poor.

2. Electrical aspects: as shown in fig. 5, leakage inductance exists in the transformer, the leakage inductance induces eddy current on the iron housing bottom plate 32 ', so that eddy current loss is generated, and the eddy current causes the housing bottom plate 32' to continuously generate heat, which seriously affects the overall heat dissipation performance of the transformer.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve among the prior art horizontal transformer's skeleton texture and make the transformer can only carry out the radiating heat dissipation and lead to the poor technical problem of radiating effect, provided a skeleton of transformer, use this kind of skeleton of transformer to make magnetic core and shell bottom plate contact, realize the conduction heat dissipation, improve horizontal transformer's heat dispersion.

The technical scheme of the utility model:

a transformer bobbin, comprising:

the winding seat comprises a middle shaft hole into which a middle shaft of the magnetic core can penetrate, and two sides of the winding seat are respectively provided with a group of pin bases;

the stitch seat, every group a plurality of stitches of having arranged on the stitch seat, it is a plurality of on every group stitch seat the direction of arranging of stitch with the axis direction in shaft hole is parallel, forms the installation space of magnetic core between two sets of stitch seats.

Optionally, the bobbin base is provided with a first bobbin for winding the secondary coil and a second bobbin for winding the primary coil, and the stitch base is arranged in a radial winding space avoiding the first bobbin and the second bobbin.

Optionally, the bobbin of the transformer includes a first bobbin and a second bobbin, the winding seat includes a first winding seat and a second winding seat, and the stitch seat includes a first stitch seat and a second stitch seat; the first bobbin comprises a first winding seat and a first pin seat, a first winding shaft for winding a secondary coil is arranged on the first winding seat, and the first pin seat is arranged in a radial winding space avoiding the first winding shaft; the second framework comprises a second winding seat and a second stitch seat, a second winding shaft for winding the primary coil is arranged on the second winding seat, and the second stitch seat avoids the radial winding space of the second winding shaft.

Further, a heat dissipation area is arranged between the first framework and the second framework.

Further, be equipped with a plurality of first archs on the first skeleton, it is protruding that the correspondence is equipped with a plurality of seconds on the second skeleton, after first skeleton and the installation of second skeleton amalgamation, first protruding and the protruding contact of second make form between first skeleton and the second skeleton the heat dissipation area.

Further, the first framework and the second framework have the same structure.

Furthermore, both ends of the winding seat are respectively provided with a limiting part, and the limiting parts are matched with the magnetic core to limit the radial movement and the circumferential movement of the magnetic core.

The utility model discloses an on the other hand provides a horizontal transformer, include as above arbitrary one the skeleton of transformer, still include primary, secondary and magnetic core, primary and secondary coiling are in on the wire winding seat, the magnetic core is installed between two sets of stitch seats.

Further, the horizontal transformer further comprises a high-voltage protection retaining wall, and the high-voltage protection retaining wall is configured between the primary coil and the magnetic core on the high-voltage side.

In another aspect of the present invention, a power supply is provided, which includes the horizontal transformer as described above, further comprising:

the circuit board is provided with a hollow groove for the horizontal transformer to pass through, and a heat dissipation bottom plate is arranged below the circuit board;

and the upper surface of the heat dissipation bottom plate is in contact with the magnetic core of the horizontal transformer so as to conduct and dissipate heat.

Furthermore, the power supply adopts an LLC resonance topological structure, and the horizontal transformer adopts a magnetic integrated structure.

After the technical scheme is adopted, compared with the prior art, the utility model, have following beneficial effect:

1. the utility model discloses a transformer skeleton is parallel with the axis direction in centre bore through the direction of arranging that sets up a plurality of stitches on every group stitch seat, install the magnetic core between two sets of stitch seats after, the closed loop magnetic circuit plane that the magnetic core formed is perpendicular with the installation face of transformer, like this alright set up the magnetic core and contact in order to carry out the conduction heat dissipation with power shell, its radiating effect of radiation type heat dissipation in prior art promotes greatly in the conduction heat dissipation, and because be used for the radiating face of contact conduction on the magnetic core for the biggest face in area on the magnetic core, make the radiating effect further promote.

2. The utility model discloses set up the transformer skeleton into split type, be first skeleton and second skeleton respectively, can carry out the wire winding to first skeleton and second skeleton simultaneously, compare and coil primary coil earlier then the coiling secondary coil in prior art, efficiency improves greatly; and because the station for winding the primary coil does not need to be switched to the station for winding the secondary coil, one station can be saved correspondingly, and meanwhile, the winding error is reduced without station switching.

3. The utility model discloses the structure that sets up first skeleton and second skeleton is identical, can save a pair mould, only need a pair mould can, practice thrift the cost greatly, the production and processing of being convenient for simultaneously.

4. The utility model discloses a set up the radiating area and dispel the heat to magnetic core axis department on the skeleton, improve the radiating effect.

5. The utility model discloses a horizontal transformer includes high pressure protection barricade, protects the barricade through high pressure and increases safe distance, guarantees the ann rule requirement.

6. The utility model discloses a power adopts LLC resonance topology framework, adopts the horizontal transformer of magnetism integrated form structure simultaneously, and LLC resonance topology framework makes the interference littleer, efficiency is higher, generate heat littleer, and magnetism integrated transformer structure makes the volume littleer, and material cost is lower.

Drawings

FIG. 1 is a schematic diagram of a skeleton structure of a horizontal transformer in the prior art;

FIG. 2 is a schematic structural diagram of a horizontal transformer in the prior art;

FIG. 3 is a schematic view of a prior art installation of a horizontal transformer at a first viewing angle;

FIG. 4 is a schematic diagram illustrating the installation of a horizontal transformer from a second perspective in the prior art;

FIG. 5 is a schematic diagram of the vortex generated by the housing bottom plate under the leakage inductance effect;

FIG. 6 is a schematic illustration of a magnetic core position embodying a pair of prior art improvements;

FIG. 7 is a schematic view of a pair of prior art improved pin bases;

FIG. 8 is a schematic diagram of a pair of prior art modified armatures in a first perspective in accordance with an embodiment;

FIG. 9 is a schematic diagram of a pair of prior art modified armatures in a second perspective in accordance with an embodiment;

FIG. 10 is a schematic diagram of a pair of prior art improved horizontal transformers (without coils) according to an embodiment;

FIG. 11 is a schematic structural diagram of a further improved embodiment of a prior art framework;

FIG. 12 is an exploded view of the skeleton according to the first embodiment;

FIG. 13 is a schematic overall view of the framework of the first embodiment from a first perspective;

FIG. 14 is a schematic overall view of the framework of the first embodiment from a second perspective;

fig. 15 is a schematic view of the overall structure of the horizontal transformer (without windings) according to the first embodiment;

FIG. 16 is a schematic illustration of a first frame and a second frame of the second embodiment taken from a first perspective prior to being assembled;

FIG. 17 is a schematic view of the second embodiment taken from a second perspective and prior to being assembled;

FIG. 18 is a schematic view of the second embodiment of the present invention after the first frame and the second frame are assembled;

FIG. 19 is a schematic view of the installation of the high-pressure retaining wall according to the second embodiment;

FIG. 20 is a schematic view showing the mounting of the magnetic core according to the second embodiment;

fig. 21 is an overall schematic view of the transformer according to the second embodiment after the transformer is mounted;

fig. 22 is a schematic view of the transformer of the third embodiment mounted from a first perspective;

fig. 23 is a schematic view of the transformer of the third embodiment mounted from a second perspective;

FIG. 24 is a circuit schematic of the LLC resonant cavity.

Wherein,

the transformer comprises a transformer framework 1 ', a middle shaft hole 111', a pin base 12 ', a pin 121', a horizontal transformer 2 ', a magnetic core 21', a primary coil 22 ', a secondary coil 23', a circuit board 31 'and a shell bottom plate 32';

the transformer comprises a transformer framework 1, a winding seat 11, a middle shaft hole 111, a first winding shaft 112, a second winding shaft 113, a stitch seat 12, a stitch 121, a first framework 13, a first protrusion 131, a first stitch seat 132, a first winding seat 133, a second framework 14, a second protrusion 141, a second stitch seat 142, a second winding seat 143, a heat dissipation area 15 and a limiting piece 16;

the transformer comprises a horizontal transformer 2, a magnetic core 21, a magnetic core center shaft 211, a primary coil 22, a secondary coil 23 and a high-voltage protection retaining wall 24;

the circuit board 31, the hollow groove 311 and the heat dissipation bottom plate 32.

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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The utility model aims at providing a be applied to horizontal transformer skeleton design of formula of sinking of fretwork circuit board can make the drain pan of the magnetic core laminating applied power product of horizontal transformer conduct the heat dissipation, improves the radiating effect. Meanwhile, the magnetic core is positioned above the bottom shell, so that eddy current shielding can be performed on the bottom shell, any eddy current cannot be generated on the iron bottom shell, the eddy current loss is avoided, the heating phenomenon caused by the eddy current is avoided, and the efficiency of the transformer is further improved. The following is a detailed description of specific embodiments.

The first embodiment is as follows:

as shown in fig. 6 to 15, the present embodiment provides a transformer bobbin 1, which includes a winding base 11 and a stitch base 12, wherein the winding base 11 includes a central axis hole 111 for allowing a central axis 211 of a magnetic core to penetrate therethrough, the central axis hole 111 is disposed through, two sides of the winding base 11 are respectively provided with a set of stitch bases 12, each set of stitch base 12 includes one or more stitch bases 12, and the stitch bases 12 are all fixed to the winding base 11, and are preferably integrally formed. A plurality of pins 121 are arranged on each group of the pin bases 12, the arrangement direction of the plurality of pins 121 on each group of the pin bases 12 is parallel to the axial direction of the central shaft hole 111, and an installation space of the magnetic core 21 is formed between the two groups of the pin bases 12.

As shown in fig. 1-2, in the prior art, the arrangement direction of a plurality of pins 121 ' on the same pin base 12 ' is perpendicular to the axial direction of the central axis hole 111 ', and the magnetic core 21 ' is located above the pin base 12 ', so that the skeleton structure can only radiate heat in a radiation manner, but cannot conduct heat radiation with better heat radiation effect. Utility model people discovers this technical problem, wants to improve in order to carry out the conduction heat dissipation to current skeleton texture, like fig. 6, utility model people discovers with magnetic core 21 around centraxonial axis rotatory 90 degrees after alright make the magnetic core 21 above the biggest face by vertical rotation for the level, like this alright regard this area the biggest face as the radiating surface of conduction, through the top shell or the drain pan contact with power shell when the installation transformer to distribute away the heat. However, after the magnetic core 21 rotates 90 degrees, the bobbin and the pins on the bobbin also rotate, so that the transformer cannot be mounted, and therefore, the arrangement of the pins also needs to be changed, as shown in fig. 7, the pins 121 are arranged on two sides of the magnetic core 21, so that the transformer can be normally mounted, and finally, the transformer bobbin shown in fig. 8-9 is obtained.

Thus, as shown in fig. 10, after the magnetic core 21 is installed between the two groups of pin bases 12 of the transformer bobbin 1 of the present embodiment, the closed-loop magnetic circuit plane formed by the magnetic core 21 is perpendicular to the installation surface of the transformer, the magnetic core 21 can be contacted with the top case or the bottom case of the power supply to perform the conductive heat dissipation, the heat dissipation effect of the conductive heat dissipation is greatly improved compared with the radiation heat dissipation of the prior art, and the heat dissipation effect can be further improved because the surface for contacting the conductive heat dissipation on the magnetic core 21 is the largest surface area on the magnetic core 21.

The transformer bobbin shown in fig. 9 includes a bobbin 11 and two groups of needle bases 12, each group of needle bases 12 is one, and the bobbin 11 is provided with a first bobbin 112 for winding a secondary coil 23 and a second bobbin 113 for winding a primary coil 22, and this bobbin structure can only perform manual winding because the radial winding space of each bobbin is blocked by the needle base 12 during winding, and the winding is very troublesome and inefficient. As shown in fig. 11, in the present embodiment, for convenience of winding, the stitch bases 12 are disposed to avoid the radial winding space of the first winding shaft 112 and the second winding shaft 113, and three stitch bases 12 are formed on both sides of the winding base 11.

However, the overall length of each group of the pin bases 12 is shortened due to the structure, the number of the pins is reduced, the requirement cannot be met, only the four pin bases 12 at the left end and the right end of the transformer framework can extend outwards to increase the number of the pins, and the size of the framework is increased.

In order to meet the requirement of the number of pins and simultaneously reduce the increase of the bobbin size as much as possible, as shown in fig. 12-14, the transformer bobbin 1 of the present embodiment is configured as a split type, i.e. a first bobbin 13 and a second bobbin 14, further, the bobbin base 11 is also divided into a first bobbin base 133 and a second bobbin base 143, and the bobbin base 12 is also divided into a first bobbin base 132 and a second bobbin base 142. Specifically, the first bobbin 13 includes a first winding seat 133 and a plurality of first stitch seats 132, the first winding seat 133 is provided with a first winding shaft 112 for winding the secondary coil 23, and the first stitch seats 132 are arranged to avoid a radial winding space of the first winding shaft 112, so that the first bobbin 13 can be independently wound, and the winding is fast and convenient; similarly, the second bobbin 14 includes a second winding seat 143 and a plurality of second stitch seats 142, the second winding seat 143 is provided with a second winding shaft 113 for winding the primary coil 22, the second stitch seats 142 avoid the radial winding space of the second winding shaft 113, so that the second bobbin 14 can be separately wound, and the winding is fast and convenient.

Thus, two first needle bases 132 may be disposed at the right end of the first frame 13, and the second needle base 142 may not be disposed at the left end of the second frame 14; or a first stitch seat 132 is arranged at the right end of the first framework 13, a second stitch seat 142 is arranged at the left end of the second framework 14, and the two stitch seats are positioned at the two sides of the frameworks and are mutually avoided; therefore, the spaces on two sides of the framework are fully utilized, and the increase of the size of the framework can be reduced as much as possible while the requirement of the number of pins is ensured.

Furthermore, the present embodiment can simultaneously wind the first bobbin 13 and the second bobbin 14, and compared with the prior art in which the primary coil is wound first and then the secondary coil is wound, the efficiency is greatly improved; moreover, as the station for winding the primary coil is not required to be switched to the station for winding the secondary coil, one station can be saved correspondingly, and meanwhile, the winding error is reduced without station switching; in addition, the final shaping adjustment of the coils is convenient to carry out after the two coils are respectively wound.

Preferably, the structure that this embodiment set up first skeleton 13 and second skeleton 14 is identical, as fig. 12, the right-hand member of first skeleton 13 sets up a first stitch seat 132, the left end of second skeleton 14 sets up a second stitch seat 142, and both are located the both sides of skeleton and avoid each other, like this alright set up first skeleton 13 and second skeleton 14 identical, can save a pair of mould, only need a pair of mould can, practice thrift the cost greatly, the production and processing of being convenient for simultaneously.

In order to further improve the heat dissipation effect, the present embodiment is provided with a heat dissipation region 15 between the first skeleton 13 and the second skeleton 14. After the two magnetic cores 21 are assembled, a gap is reserved in the magnetic core middle shaft 211 of the two magnetic cores 21 according to the requirement, so that the loss is increased, and the heat productivity is increased. The present embodiment improves the heat dissipation effect by providing the heat dissipation area 15 to dissipate heat there. Specifically, as shown in fig. 12 to 13, in this embodiment, a plurality of first protrusions 131 are disposed on the first frame 13, a plurality of second protrusions 141 are correspondingly disposed on the second frame 14, the first protrusions 131 and the second protrusions 141 may also be formed on the first pin base 132 and the second pin base 142, and after the first frame 13 and the second frame 14 are assembled, the first protrusions 131 and the second protrusions 141 are in contact with each other, so that a heat dissipation area 15 is formed between the first frame 13 and the second frame 14, and meanwhile, the size of the heat dissipation area may be set to satisfy an electrical distance between high voltage and low voltage.

Further, as shown in fig. 13, the two ends of the winding base 11 are respectively provided with a limiting member 16, and the limiting members 16 cooperate with the magnetic core 21 to limit the radial movement and the circumferential movement of the magnetic core 21. Specifically, as shown in fig. 14-15, two limiting members 16 are respectively disposed at two ends of the winding seat 11, and the shape of the limiting members 16 matches with the corresponding position on the magnetic core 21, so as to prevent the magnetic core 21 from making linear motion along the radial direction or making rotational motion along the circumferential direction.

Therefore, the transformer framework provided by the embodiment can enable the magnetic core to be in contact with the bottom plate or the top plate of the shell, so that the conduction heat dissipation is realized, the heat dissipation performance of the horizontal transformer is improved, the framework is divided into the split type, the winding efficiency is greatly improved, and the cost is saved.

Example two:

the utility model discloses a on the other hand provides a horizontal transformer 2, as fig. 16-21, the horizontal transformer 2 of this embodiment includes the transformer skeleton in embodiment one, still includes primary coil 22, secondary 23 and magnetic core 21, and primary coil 22 and secondary 23 are the coiling respectively on second skeleton 14 and first skeleton 13, and magnetic core 21 is the EE type, installs between two sets of stitch bases.

Further, the horizontal transformer 2 of the present embodiment further includes a high voltage protection wall 24, the high voltage protection wall 24 is disposed between the primary coil 22 and the high voltage side magnetic core 21, and the high voltage protection wall 24 increases a safety distance to meet safety requirements.

Referring to fig. 16-21, a secondary coil 23 is wound on the first bobbin 13 and a primary coil 22 is wound on the second bobbin 14, respectively, then the first bobbin 13 and the second bobbin 14 are spliced, then the high-voltage protection wall 24 is installed, and finally the two magnetic cores 21 are installed.

Therefore, the horizontal transformer of the embodiment is convenient to install, and safety requirements can be met through the high-voltage protective retaining wall.

Example three:

in another aspect of the present invention, there is provided a power supply, as shown in fig. 22-23, the power supply of this embodiment includes the horizontal transformer 2 in the second embodiment, and further includes a circuit board 31 and a heat dissipation bottom plate 32, the circuit board 31 is provided with a hollow-out slot 311 for allowing the horizontal transformer 2 to sink and pass, the heat dissipation bottom plate 32 is disposed below the circuit board 31, the heat dissipation bottom plate 32 can be a bottom plate of a housing of the power supply, and an upper surface of the heat dissipation bottom plate 32 contacts with the magnetic core 21 of the horizontal transformer 2 for conducting heat dissipation. Preferably, a heat conductive silicone grease is provided between the heat dissipation base plate 32 and the magnetic core 21 to enhance the heat dissipation effect.

The power supply of the embodiment adopts an LLC resonant topological architecture, which is different from flyback and forward architectures, the LLC resonant topological architecture has higher conversion efficiency and higher output power in power conversion, and resonates by means of leakage inductance and capacitance so that the system can work under the condition of soft switching.

As shown in fig. 24, the LLC resonant topology is usually a resonant cavity formed by the main inductor Lm, the leakage inductor Lr, and the resonant capacitor Cr, and the voltage division ratio needs to be changed by the leakage inductor Lr and the resonant capacitor Cr through a frequency conversion method during the resonant process, so that the output voltage is maintained stable. Although the LCC resonant topology has many advantages, the LLC resonant topology has certain problems in the power supply products of the prior art due to the existence of the leakage inductance Lr.

As shown in fig. 3-5, if the LLC resonant topology is adopted in the power supply product, the leakage inductance Lr needs to be set, and due to the existence of the leakage inductance Lr, the transformer structure is generally divided into a split structure and a magnetic integrated structure, where the split structure is equivalent to an external inductor to replace the leakage inductance Lr, and the split structure has a high material cost, and the magnetic integrated structure is equivalent to a leakage inductance Lr parasitic inside the transformer, and does not need an external inductor, and the cost is relatively low.

When a magnetic integrated structure is adopted, the leakage inductance is generally increased by increasing the gap between the two iron cores, so that the required value of the leakage inductance is met, but the gap between the two iron cores is increased, so that on one hand, the hysteresis loss is increased, the iron loss and the copper loss are increased, and the heat productivity is increased; on the other hand, the leakage flux is increased, as shown in fig. 4-5, the leakage flux passes through the space between the horizontal transformer 2 ' and the housing bottom plate 32 ', and if the housing bottom plate 32 ' is arranged at a long distance from the horizontal transformer 2 ', the leakage flux only generates a small eddy current on the housing bottom plate 32 ', but the volume of the whole product is increased and the contact type heat dissipation is more difficult; on the other hand, if the housing bottom plate 32 ' is arranged at a short distance from the horizontal transformer 2 ', the leakage flux will generate a large eddy current on the housing bottom plate 32 ', and as the leakage flux increases, the eddy current increases, and the loss and the heat generation amount also increase. Although the use of a split structure can be improved, it cannot completely solve these problems and the cost is further increased. Therefore, a series of problems of poor heat dissipation, large volume, high loss, high cost and the like exist when the LLC resonant topology architecture is adopted in a power supply product in the prior art, so that the LLC resonant topology architecture cannot be well applied.

The power supply of the embodiment may adopt an LLC resonant topology architecture, and solves the above problems. Specifically, on the one hand, for the heat dissipation problem caused by the increase of the gap, as can be seen from the description of the first embodiment, the horizontal transformer 2 is a split type framework, and a heat dissipation area is reserved between the two frameworks, so that heat generated by iron loss can be dissipated by ventilating and dissipating heat through the heat dissipation area, and the heat dissipation effect is greatly improved; on the other hand, as for the problem of generating eddy current on the heat dissipation base plate, as shown in fig. 22-23, the plane of the closed magnetic circuit formed by the magnetic core 21 is perpendicular to the transformer installation surface (i.e. the upper surface of the heat dissipation base plate 32), so compared with the prior art, the prior art is air between the coil and the heat dissipation base plate, and the magnetic core 21 is arranged between the coil and the heat dissipation base plate in the embodiment, because the magnetic resistance on the magnetic core 21 is minimum, most of leakage magnetic flux runs away from the magnetic core 21 above the heat dissipation base plate 32, and almost no leakage magnetic flux passes through the heat dissipation base plate 32, and no alternating magnetic flux induces eddy current on the heat dissipation base plate 32, thereby avoiding eddy current loss, stopping heat generation of the heat dissipation base plate 32, improving the overall heat dissipation effect, and in this way, the distance between the horizontal transformer and the heat dissipation base plate 32 can be designed to be very short, and reducing the size of the whole power supply product. Further, the horizontal transformer 2 of this embodiment adopts the magnetism integrated transformer structure (namely transformer leakage inductance Lr parasitizes inside the transformer), compares in split type transformer structure, and cost greatly reduced. It can be seen that the power supply product of the embodiment well solves a series of problems caused by adopting an LLC resonant topology architecture.

As can be seen from the above, the power supply of the embodiment conducts and dissipates heat through the contact between the magnetic core of the horizontal transformer and the heat dissipation bottom plate, so as to improve the heat dissipation effect, and performs eddy current shielding through the inherent structure of the horizontal transformer 2, so that the magnetic flux is effectively guided to the magnetic circuit, no eddy current is generated on the iron heat dissipation bottom plate 32, the loss and heat caused by the eddy current are eliminated, and the heat dissipation effect is further improved. Meanwhile, the embodiment solves a series of problems caused by the adoption of the LLC topology structure in the prior art, so that the LLC resonance topology structure can be well applied, the original power and efficiency can be ensured, and higher power can be achieved under the same transformer size.

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

Claims (11)

1. A transformer skeleton, comprising:

the winding seat (11) comprises a middle shaft hole (111) into which a middle shaft (211) of the magnetic core can penetrate, and two sides of the winding seat (11) are respectively provided with a group of pin seats (12);

the stitch seat (12), every group a plurality of stitches (121) of having arranged on stitch seat (12), it is a plurality of on every group stitch seat (12) the direction of arranging of stitch (121) with the axis direction of centre bore (111) is parallel, forms the installation space of magnetic core (21) between two sets of stitch seats (12).

2. Bobbin according to claim 1, wherein the bobbin base (11) is provided with a first bobbin (112) for winding the secondary coil (23) and a second bobbin (113) for winding the primary coil (22), and the stitch base (12) is arranged to avoid a radial winding space of the first bobbin (112) and the second bobbin (113).

3. A bobbin according to claim 1, characterized in that the bobbin comprises a first bobbin (13) and a second bobbin (14), the winding base (11) comprises a first winding base (133) and a second winding base (143), the stitch base (12) comprises a first stitch base (132) and a second stitch base (142); the first framework (13) comprises a first winding seat (133) and a first stitch seat (132), a first winding shaft (112) for winding a secondary coil (23) is arranged on the first winding seat (133), and the first stitch seat (132) is arranged in a radial winding space avoiding the first winding shaft (112); the second framework (14) comprises a second winding seat (143) and a second stitch seat (142), a second winding shaft (113) for winding the primary coil (22) is arranged on the second winding seat (143), and the second stitch seat (142) avoids the radial winding space of the second winding shaft (113).

4. Transformer bobbin according to claim 3, wherein a heat dissipation area (15) is provided between the first bobbin (13) and the second bobbin (14).

5. The transformer framework according to claim 4, wherein a plurality of first protrusions (131) are arranged on the first framework (13), a plurality of second protrusions (141) are correspondingly arranged on the second framework (14), and after the first framework (13) and the second framework (14) are assembled, the first protrusions (131) and the second protrusions (141) are contacted to enable the heat dissipation area (15) to be formed between the first framework (13) and the second framework (14).

6. Transformer bobbin according to claim 3, wherein the first bobbin (13) and the second bobbin (14) are identical in structure.

7. The transformer bobbin according to claim 1, wherein the two ends of the winding seat (11) are respectively provided with a limiting member (16), and the limiting members (16) are matched with the magnetic core (21) to limit the radial movement and the circumferential movement of the magnetic core (21).

8. Horizontal transformer, comprising a bobbin according to any of claims 1-7, further comprising a primary coil (22), a secondary coil (23) and a magnetic core (21), wherein the primary coil (22) and the secondary coil (23) are wound on the winding base (11), and wherein the magnetic core (21) is mounted between two groups of pin bases (12).

9. The horizontal transformer according to claim 8, further comprising a high voltage protection dam (24), wherein the high voltage protection dam (24) is disposed between the primary coil (22) and the high voltage side magnetic core.

10. A power supply comprising the horizontal transformer according to any one of claims 8 to 9, further comprising:

the circuit board (31) is provided with a hollow groove (311) for the horizontal transformer to pass through, and a heat dissipation bottom plate (32) is arranged below the circuit board (31);

and the upper surface of the heat dissipation bottom plate (32) is in contact with the magnetic core (21) of the horizontal transformer to conduct heat dissipation.

11. The power supply of claim 10, wherein the power supply employs an LLC resonant topology, and the horizontal transformer employs a magnetically integrated structure.

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