Transformer and power supply module

Abstract

The utility model discloses a transformer and a power supply module, and relates to the technical field of electric power products, the transformer comprises a magnetic core, a reel and a magnetic absorption layer; wherein the magnetic core is annularly arranged, and the magnetic core is provided with two magnetic columns which are oppositely arranged; the number of the winding frames is two, and the two winding frames are arranged on the peripheries of the two magnetic columns in a sleeving mode correspondingly. A primary coil is arranged on one of the peripheries of the two winding frames, and a secondary coil is arranged on the other one of the peripheries of the two winding frames; the magnetic attraction layer is arranged on the periphery of the primary coil, and the magnetic conductivity value range of the magnetic attraction layer material is 500-80000H / m. According to the technical scheme, the problem that magnetic energy generated by a primary coil in an existing transformer is prone to overflow is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power product technical field, especially a transformer and power module. BACKGROUND

[0002] With the wide application of power electronic equipment, the power transformer as the key component, its design quality plays a decisive role on the performance and reliability of the equipment. The core part of the power transformer is the magnetic core, and the selection of the magnetic core material directly affects the performance and size of the transformer.

[0003] At present, in the existing power transformer structure, the magnetic energy generated by the primary coil outside exists overflow phenomenon. This overflow phenomenon leads to the effective utilization rate of magnetic energy is reduced, only a small part of the magnetic force line can be transmitted to the position of the secondary coil, and then be absorbed by the secondary coil. SUMMARY

[0004] The main purpose of the utility model is to provide a transformer and power module, which aims to solve the problem of easy overflow of magnetic energy generated by the primary coil in the existing transformer.

[0005] To achieve the above purpose, the transformer provided by the utility model comprises:

[0006] A magnetic core is arranged in a ring shape, and the magnetic core has two magnetic columns arranged oppositely.

[0007] Two winding frames are arranged, and the two winding frames are respectively sleeved on the outer peripheries of the two magnetic columns; one of the outer peripheries of the two winding frames is provided with a primary coil, and the other of the outer peripheries of the two winding frames is provided with a secondary coil; and

[0008] A magnetic attraction layer is arranged on the outer periphery of the primary coil, and the magnetic permeability value of the material of the magnetic attraction layer ranges from 500 to 80000 H / m.

[0009] In an embodiment, the magnetic induction intensity of the material of the magnetic attraction layer is greater than 0.5 T.

[0010] In an embodiment, the material of the magnetic attraction layer is selected from at least one of nanocrystalline, armature and permalloy.

[0011] In an embodiment, the magnetic attraction layer comprises two oppositely arranged magnetic attraction blocks, and the two magnetic attraction blocks are oppositely arranged on the outer periphery of the primary coil.

[0012] In an embodiment, the magnetic attraction layer comprises a magnetic attraction sleeve, and the magnetic attraction sleeve is arranged in a gap or attached to the outer periphery of the primary coil.

[0013] In an embodiment, the transformer further comprises a shielding layer, which is sleeved on the outer periphery of the secondary coil.

[0014] In an embodiment, the bobbin comprises a first skeleton and a second skeleton which are arranged in abutment, and each of the first skeleton and the second skeleton is provided with an annular groove on one side opposite to each other, and the two annular grooves are abutted to form a mounting hole which is adapted to the sleeve of the magnetic column.

[0015] In an embodiment, the bobbin is made of insulating material.

[0016] In an embodiment, the magnetic core is arranged in a closed or open manner.

[0017] In an embodiment, the transformer further comprises a shell, an accommodation cavity is formed in the shell, and the magnetic core, the bobbin and the magnetic absorption layer are arranged in the accommodation cavity.

[0018] The utility model also provides a power module, the power module includes the transformer of any one of the above embodiment.

[0019] In the technical scheme of the utility model, two bobbins are arranged on the outside of the magnetic column of the magnetic core, and a primary coil and a secondary coil are arranged on the outer periphery of the two bobbins, so that when alternating current passes through the primary coil, a changing magnetic field is generated in the magnetic core, and an electromotive force is induced in the secondary coil. According to the turns ratio of the primary coil and the secondary coil, the transformer can realize voltage step-up (voltage increase) or voltage step-down (voltage decrease). In the scheme, the magnetic absorption layer is arranged on the outer periphery of the primary coil, so that the magnetic force line is closed in the magnetic core, the magnetic flux coupling efficiency between the primary coil and the secondary coil is effectively improved, the leakage of the magnetic force line is reduced, the magnetic circuit is optimized, and the energy consumption is reduced. Moreover, the magnetic absorption layer is made of material with magnetic permeability in the range of 500-80000 H / m, which helps to improve the magnetic absorption effect of the balance sheet. In this way, the magnetic absorption layer with high magnetic permeability can improve the energy transmission efficiency of the transformer even if the number of turns of the primary coil is small, so that a more compact magnetic core and bobbin can be designed, which is suitable for small-size portable electronic devices. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0021] Figure 1The structure schematic diagram of the transformer another embodiment provided by the utility model is shown in the figure;

[0022] Figure 2 The structure schematic diagram of the transformer another embodiment provided by the utility model is shown in the figure;

[0023] Figure 3 The structure schematic diagram of the primary coil and the bobbin in the transformer another embodiment provided by the utility model is shown in the figure;

[0024] Figure 4 The structure schematic diagram of the bobbin in the transformer another embodiment provided by the utility model is shown in the figure.

[0025] Explanation of the figure mark:

[0026] 100, transformer; 1, magnetic core; 2, bobbin; 20, annular groove; 21, first skeleton; 22, second skeleton; 3, primary coil; 4, secondary coil; 5, magnetic absorption layer; 51, magnetic absorption block; 6, shielding layer.

[0027] The realization, functional features and advantages of the utility model will be further explained by combining with the embodiments and referring to the drawings. Specific implementation

[0028] The technical scheme in the embodiments of the utility model will be clearly and completely described below by combining with the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0029] It should be noted that if the embodiments of the utility model involve directional indication (such as up, down, left, right, front, back, …), the directional indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture, if the specific posture changes, the directional indication also changes accordingly.

[0030] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the same or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0031] At present, in the existing power transformer structure, the magnetic energy generated by the primary coil outside exists overflow phenomenon. This overflow phenomenon leads to the effective utilization rate of magnetic energy to be reduced, only a small part of magnetic lines can be transmitted to the position of the secondary coil, and then be absorbed by the secondary coil.

[0032] The utility model provides a kind of transformer.

[0033] Please refer to Figure 1 In an embodiment of the utility model, the transformer 100 includes:

[0034] Magnetic core 1 is annularly arranged, and the magnetic core 1 has two magnetic columns oppositely arranged;

[0035] Winding frame 2 is provided with two, and the two winding frames 2 are respectively sleeved on the outer periphery of the two magnetic columns;One of the outer periphery of the two winding frames 2 is provided with a primary coil 3, and the other of the outer periphery of the two winding frames 2 is provided with a secondary coil 4;And

[0036] Magnetic layer 5 is arranged on the outer periphery of the primary coil 3, and the magnetic permeability value range of the material of the magnetic layer 5 is 500-80000 H / m.

[0037] The utility model discloses a technical scheme, through the outside installation of two winding frames 2 of magnetic column on the magnetic core 1, and the periphery of two winding frames 2 is equipped with primary coil 3 and secondary coil 4 respectively, like this, when alternating current passes through primary coil 3, will produce the changing magnetic field in the magnetic core 1, and then induces the electromotive force in secondary coil 4.According to the turns ratio of primary coil 3 and secondary coil 4, make that transformer 100 can realize step-up (increase voltage) or step-down (decrease voltage).In the scheme, by setting the magnetic attraction layer 5 of primary coil 3 periphery, make the magnetic force line close in the magnetic core 1 inside, effectively improve the magnetic flux coupling efficiency between primary coil 3 and secondary coil 4, reduce the leakage of magnetic force line, optimize the magnetic circuit, reduce the energy consumption.And, the magnetic attraction layer 5 selects the material quality of magnetic permeability in 500~80000H / m range, helps to improve the magnetic attraction effect of balance sheet, like this, the magnetic attraction layer 5 of high magnetic permeability, even in the case of less turns of primary coil 3 setting, can improve the energy transmission efficiency of transformer 100, so that more compact magnetic core 1 and winding frame 2 can be designed, make it applicable to small volume, portable electronic equipment.

[0038] Specifically, the material of the magnetic attraction layer 5 is not limited, for example, it can be soft magnetic alloy, amorphous alloy or nanocrystalline material, etc., wherein the soft magnetic alloy can be permalloy, iron-aluminum alloy or cobalt-based alloy, etc. Moreover, the magnetic attraction layer 5 with high magnetic permeability helps the magnetic force lines to close inside the ring-shaped magnetic core 1, reducing the magnetic field dispersion and leakage. When the current flows through the primary coil 3, the magnetic force lines around the magnetic core 1 wrapped by the primary coil 3 will concentrate more easily under the action of high magnetic permeability, so that more magnetic force lines pass through the coils on the winding frame 2, reducing the energy loss in the repeated magnetization process and improving the power density of the transformer 100. In this way, the number of turns of the coil can be reduced without changing the magnetic flux coupling efficiency between the primary coil 3 and the secondary coil 4, thereby reducing the size and weight of the transformer 100, which is suitable for portable and compact electronic devices.

[0039] In the embodiment of the utility model, the value of the magnetic induction intensity of the material of the magnetic attraction layer 5 is greater than 0.5T, the high magnetic induction intensity of the magnetic attraction layer 5 allows storing more magnetic energy under the same volume, thereby improving the magnetic flux density of the transformer 100 and enhancing the power handling capacity of the transformer 100. Since the magnetic attraction layer 5 can withstand higher magnetic flux density, the transformer 100 can handle larger load without magnetic saturation, improving the load capacity and working efficiency of the transformer 100. The magnetic attraction layer 5 with high magnetic induction intensity enables the magnetic core 1 to achieve the required magnetic flux density in a smaller volume, makes the magnetic lines of force close in the interior of the magnetic core 1, effectively improves the magnetic flux coupling efficiency between the primary coil 3 and the secondary coil 4, reduces the leakage of the magnetic lines of force, thereby a smaller magnetic core 1 can be designed, reducing the overall size of the transformer 100. Moreover, the magnetic attraction layer 5 with high magnetic induction intensity generates lower loss when reaching the saturation state, which helps to reduce the loss of the magnetic core 1 of the transformer 100 and improve the efficiency of the transformer 100.

[0040] In the embodiment of the utility model, the material of the magnetic attraction layer 5 is selected from at least one of nanocrystalline, armature and permalloy. The magnetic permeability of these materials can be as high as hundreds of thousands of H / m, and the specific selection can be made according to actual needs. When permalloy is selected, the value of the magnetic permeability can be adjusted by changing the percentage of nickel-iron alloy in the alloy material. Specifically, for the selection of the material of the magnetic attraction layer 5, in the case that the two parameters of magnetic permeability and magnetic saturation induction intensity meet the requirements, the influence of the two parameters of coercive force and resistivity on the magnetic attraction of the magnetic attraction layer 5 should also be considered, and the material with smaller coercive force and larger resistivity is preferably selected. This is because smaller coercive force means less energy required for magnetization or demagnetization, so the electromagnetic equipment made of such material has lower energy consumption during operation; and due to the small coercive force, the magnetic attraction layer 5 can quickly reach magnetic saturation or recover from the saturation state. High resistivity helps to reduce eddy current loss, because eddy current is a closed current loop generated in conductive material due to changing magnetic field, and high resistivity limits the formation of such current, reducing heat loss.

[0041] In the embodiment of the utility model, please refer to Figure 3 The magnetic attraction layer 5 includes two oppositely arranged magnetic attraction blocks 51, and the two magnetic attraction blocks 51 are oppositely arranged at the outer periphery of the primary coil 3. The magnetic attraction block 51 can be connected with the bobbin 2 through other fixing structures, and the arrangement of the two magnetic attraction blocks 51 is not specifically limited, for example, it can be arranged on the upper and lower sides of the magnetic core 1 respectively, for preventing the overflow of magnetic energy in the upward and downward directions, effectively reducing the magnetic flux leakage and reducing the magnetic loss. It should be noted that the shape of the magnetic attraction block 51 is not specifically limited, for example, it can be a cube or an arc-shaped solid structure, as long as it can prevent the emission of magnetic lines of force.

[0042] In the embodiment of the utility model, please refer toFigure 1 and Figure 2 The magnetic absorption layer 5 comprises a magnetic absorption sleeve, which is arranged at the outer periphery of the primary coil 3 or attached to the outer periphery of the primary coil 3. By arranging the magnetic absorption sleeve at the outer periphery of the primary coil 3, the magnetic force lines can be prevented from spreading in multiple directions, the leakage of the magnetic flux around the primary coil 3 is maximally reduced, and thus the energy conversion efficiency of the transformer 100 is improved. The shape of the magnetic absorption sleeve is not limited, for example, the magnetic absorption sleeve can be in a cylindrical shape or a prismatic sleeve shape, as long as the magnetic absorption sleeve can improve the distribution of the magnetic force lines.

[0043] In the embodiment of the present application, please refer to Figure 1 and Figure 2 The transformer 100 further comprises a shielding layer 6, which is arranged at the outer periphery of the secondary coil 4. The shielding layer 6 can be a nanocrystalline soft magnetic alloy sheet, which can absorb and block the leakage magnetic flux, so that the secondary coil 4 and the primary coil 3 are well coupled, and the efficiency of the transformer 100 is improved. Alternatively, the shielding layer 6 comprises 3-5 layers of nanocrystalline soft magnetic alloy sheets, which can ensure effective magnetic shielding effect, save materials and reduce costs. Further, the shielding layer 6 can be further provided with an insulating protective layer at the outer periphery, so as to play an insulating and protective role.

[0044] In the embodiment of the present application, please refer to Figure 4, the winding frame 2 comprises a first skeleton 21 and a second skeleton 22 which are arranged in abutment, and the first skeleton 21 and the second skeleton 22 are provided with annular grooves 20 on the opposite sides thereof, and the two annular grooves 20 are abutted to form a mounting hole which is adapted to the sleeve of the magnetic column. Specifically, the magnetic core 1 in the embodiment is arranged in a mouth-shaped form, and the mouth-shaped magnetic core 1 is an integrated structure, which can reduce the leakage of the transformer 100. In addition, the winding frame 2 which is sleeved on the two magnetic columns arranged in opposition is arranged in a split form, which is convenient for production and assembly. The winding frame 2 is split into the first skeleton 21 and the second skeleton 22 which are detachably connected, so that the installation and debugging are very convenient. The annular grooves 20 are arranged in the interiors of the first skeleton 21 and the second skeleton 22, so that after the installation is completed, it is very easy to judge whether the first skeleton 21 and the second skeleton 22 are abutted perfectly, and meanwhile, the mounting hole formed by the abutment of the two annular grooves 20 can just pass through the magnetic column of the mouth-shaped magnetic core 1, which is convenient for installation. The integrated magnetic core 1 and the detachable winding frame 2 are arranged in the application, and the two are used in cooperation, so that the leakage of the transformer 100 is greatly reduced, and since the first skeleton 21 and the second skeleton 22 are detachably connected, the process of producing the transformer 100 is simplified, and the reliability is high. Optionally, the mounting hole is circular or other shapes which are adapted to the magnetic column. Optionally, the outer side end portions of the first skeleton 21 and the second skeleton 22 are provided with gears around the mounting hole, and the gears can facilitate the winding of the coil in the production process, that is, after the first skeleton 21 and the second skeleton 22 are connected to form the winding frame 2 around the magnetic column of the mouth-shaped magnetic core 1, the gears of the outer side end portions of the first skeleton 21 and the second skeleton 22 are connected with the coil, so that the winding is more flat.

[0045] In the embodiment of the utility model, winding frame 2 adopts insulating material, the insulating winding frame 2 can effectively isolate current, prevent short circuit between coil winding or between coil winding and magnetic core 1, improve safety and reliability of transformer 100. And, insulating winding frame 2 helps to reduce leakage phenomenon, reduce leakage loss, improve electric energy conversion efficiency of transformer 100. In addition, the weight of insulating material is usually lighter than metal, and the use of insulating winding frame 2 can reduce the overall weight of transformer 100.

[0046] In the embodiment of the utility model, please refer to Figure 2 , magnetic core 1 is arranged in a closed or open form, and the magnetic core 1 adopts a closed structure, such as a mouth-shaped form, which can more effectively guide the magnetic force line, reduce the leakage of magnetic flux, thereby improving the utilization rate of magnetic flux and the efficiency of the transformer 100. The magnetic core 1 adopts an open structure, such as a mountain-shaped or U-shaped form, which not only facilitates the installation of the winding frame 2, but also helps the air circulation, improves the heat dissipation conditions inside the transformer 100, reduces the temperature rise, and prolongs the service life of the equipment.

[0047] In the embodiment of the utility model, transformer 100 still includes the shell, the inside of shell forms the accommodation cavity, magnetic core 1, reel 2 and the magnetic layer 5 all are located in the accommodation cavity. The shape of shell is not limited, for example is square, round or other special-shaped structure etc., as long as the hollow structure that can form the accommodation cavity inside can. The setting of shell provides additional structural support, so that magnetic core 1, reel 2 and the magnetic layer 5 are fixed more stable in the accommodation cavity, reduce the vibration and impact damage of transformer 100 in the process of transportation and use. And, shell can effectively protect internal components, prevent dust, moisture and other external factors from eroding magnetic core 1, reel 2 and the magnetic layer 5. It needs to be explained that shell is usually made of conductive material, can play the role of electromagnetic shielding, reduce the electromagnetic interference of transformer 100 to the outside, at the same time protect internal components from the interference of external electromagnetic field.

[0048] The utility model also proposes a kind of power module, the power module includes transformer 100, the specific structure of transformer 100 refers to above-mentioned embodiment, since the power module of the present application adopts all technical solutions of above-mentioned all embodiments, at least have all beneficial effects brought by the technical scheme of above-mentioned embodiment, here no longer repeat. Wherein, power module can include transformer 100 and semiconductor device, transformer 100 as substrate carrier, and pad is equipped on transformer 100, for welding semiconductor device. Semiconductor device can be chip, resistance or capacitor etc., the present application embodiment does not limit this.Of course, in other embodiments, power module can also include other functional units, for example, filter circuit that plays the role of filtering etc.

[0049] The above-mentioned is only the exemplary implementation of the utility model, and not therefore limit the patent range of the utility model, is in the technical concept of the utility model, utilizes the equivalent structure transformation of utility model specification and attached drawing contents, or direct / indirectly applied in other related technical fields all include in the patent protection range of the utility model.

Claims

1. A transformer, characterized by The transformer comprises: a magnetic core arranged in a ring shape, the magnetic core having two magnetic columns arranged oppositely; two bobbins, each of which is sleeved on the outer periphery of one of the two magnetic columns, one of the outer peripheries of the two bobbins is provided with a primary coil, and the other of the outer peripheries of the two bobbins is provided with a secondary coil; and a magnetic suction layer arranged on the outer periphery of the primary coil, the magnetic permeability of the material of the magnetic suction layer being in the range of 500-80000 H / m.

2. The transformer of claim 1, wherein, The magnetic induction intensity of the material of the magnetic suction layer is greater than 0.5 T.

3. The transformer of claim 1, wherein, The magnetic suction layer comprises two oppositely arranged magnetic suction blocks, and the two magnetic suction blocks are oppositely arranged on the outer periphery of the primary coil. Alternatively, the magnetic suction layer comprises a magnetic suction sleeve, and the magnetic suction sleeve is arranged in the gap or attached to the outer periphery of the primary coil.

4. The transformer of claim 1, wherein, The transformer further comprises a shielding layer, and the shielding layer is sleeved on the outer periphery of the secondary coil.

5. The transformer of claim 1, wherein, The bobbin comprises a first skeleton and a second skeleton arranged in abutment, the first skeleton and the second skeleton each have a ring-shaped groove on the side opposite to each other, and the two ring-shaped grooves are abutted to form a mounting hole suitable for sleeving the magnetic column.

6. The transformer of claim 5, wherein, The bobbin is made of insulating material.

7. The transformer of claim 1, wherein The magnetic core is arranged in a closed or open manner.

8. The transformer of any one of claims 1 to 7, wherein, The transformer further comprises a shell, the inside of the shell forms a receiving cavity, and the magnetic core, the bobbin and the magnetic suction layer are arranged in the receiving cavity.

9. A power module, characterized by The power supply module comprises the transformer according to any one of claims 1-8.

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