High-frequency transformer with efficient heat dissipation function

Abstract

The utility model discloses an efficient heat dissipation high-frequency transformer, and relates to the technical field of transformers. The transformer is made of the stacked aluminum substrates, the etched planar winding coils are arranged on the aluminum substrates, the planar winding coils surround the magnetic core in the center, then different planar winding coils can be connected to form a primary coil or a secondary coil of the transformer, different transformation outputs can be formed, and connection and use are flexible. The winding coils are directly processed on the aluminum substrate and then connected into the transformer primary coil and the transformer secondary coil, compared with a traditional flat transformer, the transformer is compact in structure and small in size, the height of the transformer does not exceed other electronic parts on the aluminum substrate any more, and the transformer is particularly suitable for being used in a low-voltage digital circuit; and the transformer can be quickly and effectively cooled by utilizing the good thermal conductivity of the aluminum substrate.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic transformers, in particular to a high-frequency transformer with high-efficiency heat dissipation. Background Art

[0002] The transformer is a key component in the power supply. Traditional transformers are usually composed of silicon steel sheets or ferrite cores and copper coils, and are usually large in size. Compared with traditional transformers, planar transformers have a more compact space structure and higher energy density, which can well overcome the shortcomings of traditional magnetic components.

[0003] A Chinese utility model with patent announcement number CN202930161U and name "A flat transformer" discloses a flat transformer, including a primary winding and a secondary winding arranged in a magnetic core groove, the magnetic core includes a square upper magnetic core and a lower magnetic core, and the secondary winding is arranged between the two primary windings; an insulating layer is arranged between the primary winding and the secondary winding; the flat transformer is mainly composed of an upper magnetic core, a lower magnetic core, a primary winding and a secondary winding, and the number of turns of the primary winding and the secondary winding is small, so that the flat transformer structure is relatively simple, which is conducive to automated assembly; it also has the advantages of small size, good current distribution and heat dissipation, high current density and high power density.

[0004] A Chinese utility model patent with patent announcement number CN211088046U and name "A high heat dissipation flat transformer" discloses a high heat dissipation flat transformer, which is provided with a heat dissipation component. The two heat sinks in the heat dissipation component are coated with a layer of thermal conductive silicone grease, so that the heat emitted by the transformer body is more effectively conducted to the heat sink, and then dissipated into the surrounding air through the heat sink. The heat dissipation channel formed by the air vents, heat dissipation holes and vents, cooperates with the heat dissipation motor to drive the fan blades to rotate, forming a rapid flow of air, and quickly discharges the heat absorbed by the heat sink to the outside of the shell, thereby improving the heat dissipation effect.

[0005] The above planar transformers are basically modified based on the common planar transformer structure, and the transformer structure cannot be further improved. The heat dissipation effect needs to be further improved. Utility Model Content

[0006] In order to solve the above problems, the purpose of the utility model is to provide a high-frequency transformer with high efficiency heat dissipation based on an aluminum substrate design.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A high-frequency transformer with efficient heat dissipation comprises two or more aluminum substrates stacked together, a planar winding coil is processed on the copper foil circuit layer of each aluminum substrate, a magnetic core mounting through hole is provided on the aluminum substrate at the center of the planar winding coil, a magnetic core passes through the stacked magnetic core mounting through hole, a plurality of the planar winding coils are isolated from each other, nested or stacked around the outer ring of the magnetic core, and are correspondingly connected to form the primary coil and secondary coil of the transformer.

[0009] Furthermore, the aluminum substrate includes a first aluminum substrate and a second aluminum substrate stacked together, an insulating partition is provided between the first aluminum substrate and the second aluminum substrate, and the insulating partition is also provided with a magnetic core mounting through hole corresponding to the magnetic core mounting through hole.

[0010] Furthermore, planar winding coils are provided on both the front and back sides of the first aluminum substrate and the second aluminum substrate. The planar winding coils constituting the primary coil of the transformer surround the magnetic core mounting through hole, and the planar winding coils constituting the secondary coil of the transformer surround the primary coil.

[0011] Furthermore, the surface of the first aluminum substrate or the second aluminum substrate is provided with terminals respectively connected to the two ends of the planar winding coil, and the planar winding coil is respectively connected to form a primary coil or a secondary coil of a transformer through the terminals.

[0012] Furthermore, the insulating partition is provided with a plurality of conductive posts penetrating therethrough from top to bottom, and the conductive posts are electrically connected to the connecting posts on the first aluminum substrate and the second aluminum substrate respectively.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model directly processes the winding coil on the aluminum substrate and then connects it into the primary coil and the secondary coil of the transformer. Compared with the traditional flat transformer, it has a compact structure and a small size. The height of the transformer will no longer exceed other electronic parts on the aluminum substrate, and it is particularly suitable for low-voltage digital circuits.

[0015] 2. The utility model uses an aluminum substrate as a structural part of the transformer and utilizes the good thermal conductivity of the aluminum substrate to quickly and effectively dissipate heat from the transformer.

[0016] 3. The transformer of the utility model is composed of a plurality of stacked aluminum substrates. Different planar winding coils can be connected in series to form a primary coil or a secondary coil of the transformer, and different voltage transformation outputs can be formed, and the connection and use are flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the high-frequency transformer with high-efficiency heat dissipation of the utility model;

[0018] Figure 2 for Figure 1 The enlarged schematic diagram of the middle A part;

[0019] Figure 3 This is a front view of the first aluminum substrate of the utility model;

[0020] Figure 4 This is a rear view of the first aluminum substrate of the utility model;

[0021] Figure 5 It is a front view of the second aluminum substrate of the utility model;

[0022] Figure 6 This is a rear view of the second aluminum substrate of the utility model;

[0023] Figure 7 It is a front view of the insulating partition of the utility model.

[0024] Description of reference numerals:

[0025] 1. Aluminum substrate; 11. First aluminum substrate; 12. Second aluminum substrate; 2. Terminal block; 3. Insulating partition; 31. Conductive column; 32. Magnetic core mounting via hole; 4. Magnetic core mounting through hole; 5. Magnetic core; 6. Planar winding coil. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Embodiment 1

[0027] See also Figure 1-6As shown, a high-frequency transformer with efficient heat dissipation, the aluminum substrate 1 includes a first aluminum substrate 11 and a second aluminum substrate 12, the first aluminum substrate 11 is on the top, the second aluminum substrate 12 is on the bottom, and an insulating partition 3 is arranged in the middle, the insulating partition 3 is made of a heat-conductive material, and a magnetic core mounting through hole 32 corresponding to the aluminum substrate 1 is arranged on the insulating partition 3. The three are stacked and assembled together in sequence, and then the magnetic core 5 is fixedly installed in the magnetic core mounting through hole 4 and the magnetic core mounting through hole 32 between the first aluminum substrate 11 and the second aluminum substrate 12. A mounting ring groove can be arranged on the magnetic core 5 and fixed in the magnetic core mounting through hole 4 by glue or buckle. The first aluminum substrate 11 and the second aluminum substrate 12 are both provided with a planar winding coil 6 surrounding the magnetic core mounting through hole 4 on the front and back sides; correspondingly connected terminal posts 2 are provided at the head and tail ends of the planar winding coil 6, and the planar winding coil 6 is connected to form a primary coil or a secondary coil of a transformer through the terminal posts 2, wherein the planar winding coil 6 constituting the primary coil of the transformer surrounds the magnetic core mounting through hole 4, and the planar winding coil 6 constituting the secondary coil of the transformer surrounds the primary coil; the insulating partition 3 is provided with a conductive post 31 passing through it from top to bottom corresponding to the position of the terminal post 2, and the conductive post 31 is electrically connected to the terminal posts 2 on the first aluminum substrate 11 and the second aluminum substrate 12 accordingly.

[0028] After the primary coil formed by the planar winding coil 6 is connected to the power supply, the converted voltage is output through the secondary coil. The primary coil and the secondary coil can be respectively formed by connecting a plurality of planar winding coils 6 in series. Through different series connections and tap outputs of the planar winding coils 6, the terminal 2, the conductive column 31 and the wire, a plurality of groups of voltage conversion outputs can be formed to adapt to different voltage conversion demand environments. As needed, a plurality of groups of first aluminum substrates 11 and second aluminum substrates 12 can be stacked together to further increase the voltage conversion range.

[0029] Taking advantage of the excellent thermal conductivity of the aluminum substrate 1 itself, the insulating partition 3 also has a thermal conductivity function, which can quickly absorb the heat generated by the planar winding coil 6 and quickly dissipate the heat outward to ensure that the internal temperature of the transformer is in a suitable state, which can effectively extend the service life of the transformer. Embodiment 2

[0030] This embodiment almost includes all the contents of the first embodiment, the only difference is that there are four aluminum substrates 1, and the planar winding coil 6 constituting the secondary coil of the transformer surrounds the magnetic core mounting through hole 4, and the planar winding coil 6 constituting the primary coil of the transformer surrounds the secondary coil.

[0031] Since the number of turns of the primary coil is less than that of the secondary coil, the high frequency transformer is set to a boost function. Multiple aluminum substrates 1 are stacked, so that the output wires have more possible combinations of series connection and tapping, increasing the diversity of its output capacity.

[0032] The above description is only a specific implementation method of the utility model, and does not limit the patent scope of the utility model. Any equivalent structural transformation made using the contents of the utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the utility model.

Claims

1. A high-frequency transformer with high efficiency heat dissipation, characterized in that: The invention comprises two or more aluminum substrates (1) stacked together, wherein a planar winding coil (6) is processed on the copper foil circuit layer of each aluminum substrate (1), a magnetic core mounting through hole (4) is provided on the aluminum substrate (1) at the center of the planar winding coil (6), a magnetic core (5) passes through the stacked magnetic core mounting through hole (4), and a plurality of the planar winding coils (6) are isolated from each other, nested or stacked around the outer ring of the magnetic core (5), and are connected accordingly to form the primary coil and the secondary coil of the transformer.

2. A high-frequency transformer with high efficiency heat dissipation according to claim 1, characterized in that: The aluminum substrate (1) comprises a first aluminum substrate (11) and a second aluminum substrate (12) stacked together, an insulating partition (3) is provided between the first aluminum substrate (11) and the second aluminum substrate (12), and a magnetic core mounting through hole (32) corresponding to the magnetic core mounting through hole (4) is provided on the insulating partition (3).

3. A high-frequency transformer with high efficiency heat dissipation according to claim 2, characterized in that: Planar winding coils (6) are provided on both the front and back sides of the first aluminum substrate (11) and the second aluminum substrate (12); the planar winding coils (6) constituting the primary coil of the transformer surround the magnetic core mounting through hole (4); and the planar winding coils (6) constituting the secondary coil of the transformer surround the primary coil.

4. The high-frequency transformer with high efficiency heat dissipation according to claim 3, characterized in that: The surface of the first aluminum substrate (11) or the second aluminum substrate (12) is provided with binding posts (2) respectively connected to the two ends of the planar winding coil (6), and the planar winding coil (6) is respectively connected to form a primary coil or a secondary coil of a transformer through the binding posts (2).

5. The high-frequency transformer with high efficiency heat dissipation according to claim 4, characterized in that: The insulating partition (3) is provided with a plurality of conductive posts (31) penetrating therethrough vertically, and the conductive posts (31) are electrically connected to the connecting posts (2) on the first aluminum substrate (11) and the second aluminum substrate (12) respectively.

Images