Small transformer with adjustable winding module

Abstract

The invention relates to the technical field of transformers, in particular to a small transformer with an adjustable winding module, which comprises a mounting magnetic core, the mounting magnetic core comprises a first rectangular plate and a second rectangular plate, the first rectangular plate and the second rectangular plate are respectively provided with magnetic columns for winding, and the magnetic columns are sleeved with coil modules; a hollow hole of a hollow structure is formed in each magnetic column, a magnetic adjusting column is installed on the magnetic column of the second rectangular plate, the adjusting columns can be inserted into the adjusting columns of the first rectangular plate and the second rectangular plate at the same time, the adjusting columns are made of magnetic materials and can be inserted into the hollow holes across the first rectangular plate and the second rectangular plate, and the adjusting columns move in the length direction of the hollow holes. The length of the magnetic column can be adjusted, and the magnetic column can be dynamically adjusted according to actual requirements for coil modules with different lengths. The sliding rail is in damping sliding fit with the T-shaped groove; therefore, the area surrounded by the coil module by the side plate can be adjusted, and the coil module sleeved on the magnetic column can be laterally surrounded by the side plate with a gap.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, in particular to a small transformer with adjustable winding module. BACKGROUND

[0002] The small transformer mainly refers to a single-phase transformer below 20KV·A and a three-phase transformer below 50KV·A, which is characterized by small volume, low cost and less wire. The load rate and utilization rate of the small transformer are generally low, and the inductive load carried by the small transformer is generally not capacitively compensated, and the small transformer is widely used in various electrical equipment.

[0003] The application with the application number CN202320133977.5 discloses a transformer framework, which comprises a supporting bottom rod, the top surface of the supporting bottom rod is horizontally provided with a matching top rod, the two side edges of the supporting bottom rod and the matching top rod are horizontally and symmetrically welded with fixed side strips, the top surface of the fixed side strips is uniformly provided with fixed through holes, the top surface of the supporting bottom rod and the matching top rod is horizontally provided with a through groove, the top surface of the supporting bottom rod is vertically welded upwards with an extension plug rod, the bottom surface of the matching top rod is vertically and symmetrically welded downwards with a sleeve joint rod, the top surface of the supporting bottom rod is vertically and symmetrically welded upwards with a supporting plug rod, and the top surface of the matching top rod is symmetrically provided with a through hole. The movable adjusting structure can be used for adding or reducing operation, meets the needs of coil installation, and can be combined with the adjustable structure to meet the installation of coils of various specifications and sizes, greatly improving the universality of installation.

[0004] In the prior art, most transformers are in a fixed form, that is, the number of coils can only be set according to the length of the magnetic column, and when the required number of coils is greater than the length of the magnetic column, the requirement cannot be met, and it is necessary to additionally develop magnetic columns of different product sizes. SUMMARY

[0005] The present application aims at the deficiencies of the prior art and provides a small transformer with an adjustable winding module.

[0006] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: A small transformer with an adjustable winding module, comprising a mounting magnetic core, the mounting magnetic core comprising a first rectangular plate and a second rectangular plate, the first rectangular plate and the second rectangular plate being respectively provided with a magnetic column for winding, the magnetic column being sleeved with a coil module, the coil module comprising a plurality of copper rings and a wire cake, the copper rings and the wire cake being arranged alternately, wherein the wire cake is provided with a first connecting wire and a second connecting wire; the copper ring is provided with a first conductive port and a second conductive port; the mounting magnetic core is provided with a wiring board and a PC partition plate, the first conductive port and the second conductive port being connected with the wiring board respectively, and the first connecting wire and the second connecting wire being connected with the PC partition plate respectively; The first rectangular plate and the second rectangular plate respectively comprise a plate body, and a side plate is slidably installed on both sides of the plate body; a T-shaped sliding rail is formed on the inner side wall of the side plate along the length direction; a T-shaped groove is formed on the side wall of the plate body and slidably matched with the sliding rail; and the sliding rail and the T-shaped groove are slidably matched in a damping manner; The plate body is further formed with an adjusting hole coaxially aligned with the magnetic column, the adjusting hole is fixedly installed with a first threaded sleeve, a second threaded sleeve is fixedly sleeved on the part of the magnetic column close to the plate body, and the first threaded sleeve and the second threaded sleeve are threadedly matched to adjust the length of the magnetic column; The magnetic column is formed with a hollow hole of a hollow structure, the magnetic column of the second rectangular plate is installed with a magnetic adjusting column, the adjusting column can move in the length direction of the hollow hole, and the adjusting column can be simultaneously inserted into the hollow holes of the magnetic columns of the first rectangular plate and the second rectangular plate.

[0007] The PC partition physically isolates the connection wire led out by the wire cake from the conductive port of the copper ring, meets the creepage distance and electrical clearance requirements in a high-voltage scene, the conductive port of the copper ring is directly connected to the terminal board, a design similar to a limiting groove and a clamping seat is adopted to ensure the connection stability in a high-frequency vibration environment, the present scheme realizes active regulation of leakage inductance through the interphase arrangement of the copper ring and the wire cake, The adjusting column is made of magnetic material and can be inserted into the hollow hole across the first rectangular plate and the second rectangular plate, and the length of the magnetic column is adjusted by moving along the length direction of the hollow hole to cope with coil modules of different lengths and dynamically adjust according to actual requirements; the side wall of the plate body is formed with a T-shaped groove slidably matched with the sliding rail, and when the size of the transformer needs to be adjusted, the sliding rail and the T-shaped groove are slidably matched in a damping manner when the coil module of different lengths is wound (i.e., the number of turns of the coil is changed); the area surrounded by the side plate to the coil module can be adjusted, and the coil module sleeved on the magnetic column can be laterally surrounded with a gap by the side plate; The first threaded sleeve and the second threaded sleeve are threadedly matched to adjust the length of the magnetic column; the magnetic column is precisely adjusted in the axial length through the threaded matching of the first threaded sleeve and the second threaded sleeve, the threaded adjusting structure supports the segmented extension of the magnetic column, and the range expansion of the sliding side plate can flexibly adapt to the super-thick coil module of the multi-layer wire cake superposition. The surrounding range adjustment of the sliding side plate can be matched with the length change of the magnetic column to form a dynamic shielding cover; in the long coil module scene, the side plate is expanded to the edge of the coil to reduce the leakage of the magnetic field to the outside; in the short coil module scene, the side plate is retracted to form a compact shielding space to enhance the coupling degree of the coil and the magnetic core. The transformer can adjust the length of the coil module according to the requirements, without the need for additional development of different molds, and the manufacturing cost is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a front view structural schematic diagram of the transformer.

[0009] Figure 2 is a schematic view of the structure of the transformer in the axial direction, and the coil module is hidden.

[0010] Figure 3 is a schematic view of the exploded structure of the transformer.

[0011] Figure 4 is a schematic view of the structure of the copper coil.

[0012] Figure 5 is a schematic view of the exploded structure of the installation of the magnetic core.

[0013] The reference signs include: 1 - installation of the magnetic core, 11 - first rectangular plate, 12 - second rectangular plate, 13 - magnetic column, 14 - adjusting hole, 15 - first threaded sleeve, 16 - second threaded sleeve, 17 - hollow hole, 18 - adjusting column, 19 - plate body, 190 - side plate, 191 - sliding rail, 192 - T-shaped groove, 193 - side guide groove, 194 - side guide column, 2 - coil module, 21 - copper coil, 22 - wire cake, 23 - first connecting wire, 24 - second connecting wire, 25 - first conductive port, 26 - second conductive port, 27 - first inner diameter hole, 28 - arc-shaped plate, 29 - first compression spring, 3 - wiring structure, 31 - PC partition, 32 - first wiring end, 33 - second wiring end, 34 - first soldering part, 35 - copper sheet bus bar, 36 - conductive welding groove, 37 - insulating plate, 38 - insulating guide groove, 39 - fixed installation groove.

[0014] 4 - shielding shell 41 - upper shell, 42 - lower shell, 43 - elastic groove, 44 - elastic connecting column, 45 - elastic movable hole, 46 - second tension spring. DETAILED DESCRIPTION

[0015] The present application will be described in detail below in conjunction with the accompanying drawings.

[0016] As Figures 1-4As shown, a small transformer with adjustable winding module includes a mounting magnetic core 1, the mounting magnetic core 1 includes a first rectangular plate 11 and a second rectangular plate 12, the first rectangular plate 11 and the second rectangular plate 12 are respectively provided with a magnetic column 13 for winding, the magnetic column 13 is sleeved with a coil module 2, the coil module 2 includes a plurality of copper coils 21 and a wire cake 22, the copper coils 21 and the wire cake 22 are arranged alternately, wherein the wire cake 22 is provided with a first connecting wire 23 and a second connecting wire 24 led out outward; the copper coil 21 is provided with a first conductive port 25 and a second conductive port 26; the mounting magnetic core 1 is provided with a wiring structure 3, the wiring structure 3 includes a wiring plate and a PC partition plate 31, the first conductive port 25 and the second conductive port 26 are respectively connected with the wiring plate, and the first connecting wire 23 and the second connecting wire 24 are respectively connected with the PC partition plate 31.

[0017] The structure that the copper coil 21 and the wire cake 22 are alternately wound can actively control leakage inductance through differentiated winding distribution; the flat structure of the wire cake 22 can increase the leakage magnetic flux path, and the close winding of the copper coil 21 can enhance the coupling effect, forming a high leakage inductance characteristic similar to a hybrid common mode choke coil.

[0018] The PC partition plate 31 physically isolates the connecting wires led out by the wire cake 22 from the conductive ports of the copper coil 21, meeting the creepage distance and electrical clearance requirements in a high-voltage scenario; the conductive ports of the copper coil 21 are directly connected to the wiring plate, and a design similar to a limiting groove and a clamping seat is adopted to ensure the connection stability in a high-frequency vibration environment; the present scheme actively controls leakage inductance through the alternate arrangement of the copper coil 21 and the wire cake 22.

[0019] Each magnetic column 13 independently winds the coil module 2, forming a multi-winding parallel structure, which can flexibly adjust the power distribution of each winding, for example, by increasing or decreasing the number of magnetic columns 13 to linearly expand the power density; The first rectangular plate 11 and the second rectangular plate 12 respectively include a plate body 19, both sides of the plate body 19 are respectively slidably provided with a side plate 190; the inner side wall of the side plate 190 is formed with a T-shaped sliding rail 191 along the length direction, and the side wall of the plate body 19 is formed with a T-shaped groove 192 in sliding cooperation with the sliding rail 191; when it is necessary to adjust the size of the transformer, when the coil module 2 of different lengths is wound (i.e. the number of turns of the coil is changed), the sliding rail 191 and the T-shaped groove 192 are dampingly and slidably cooperated; so that the area surrounded by the side plate 190 to the coil module 2 can be adjusted, and it is ensured that the coil module 2 sleeved on the magnetic column 13 can be side-surrounded by the side plate 190 with a gap.

[0020] Preferably, the side plate 190 can be made of a magnetic material, so that the first rectangular plate 11 and the second rectangular plate 12 are connected by the magnetic adhesion of the side plate 190.

[0021] Meanwhile, in order to adjust the length of the coil module 2, the plate body 19 is further formed with an adjusting hole 14 coaxially aligned with the magnetic column 13, the adjusting hole 14 is fixedly installed with a first threaded sleeve 15, the first threaded sleeve 15 has an internal thread structure, the part of the magnetic column 13 close to the plate body 19 is fixedly sleeved with a second threaded sleeve 16, the second threaded sleeve 16 has an external thread structure, the first threaded sleeve 15 and the second threaded sleeve 16 are threadedly matched to adjust the length of the magnetic column 13; the magnetic column 13 is precisely adjusted in axial length through the thread matching of the first threaded sleeve 15 and the second threaded sleeve 16, the threaded adjusting structure supports the segmented extension of the magnetic column 13, cooperates with the range expansion of the sliding side plate 190, and can flexibly adapt to the super-thick coil module 2 with multiple layers of wire cakes stacked. The surrounding range adjustment of the sliding side plate 190 can cooperate with the length change of the magnetic column 13 to form a dynamic shielding cover, in the long coil module 2 scenario, the side plate 190 is expanded outward to the coil edge to reduce the leakage magnetic radiation to the outside; in the short coil module 2 scenario, the side plate 190 is retracted to form a compact shielding space to enhance the coupling degree of the coil and the magnetic core. The transformer can adjust the length of the coil module 2 according to the needs, without the need for additional development of different molds, and the manufacturing cost is further reduced.

[0022] The threaded extension of the magnetic column 13 can accurately change the length of the magnetic circuit, thereby dynamically matching the inductance demand brought by the change in the number of turns of the coil; when the number of turns of the coil increases, lengthening the magnetic column 13 can avoid magnetic circuit saturation; when the number of turns of the coil is doubled, lengthening the magnetic column 13 by 50% can increase the saturation magnetic induction by 30%; when the number of turns of the coil decreases, shortening the magnetic column 13 can reduce the magnetic resistance; when the number of turns of the coil is halved, shortening the magnetic column 13 by 40% can reduce the iron loss by 25%.

[0023] The magnetic column 13 is formed with a hollow hole 17 of a hollow structure, the magnetic adjusting column 18 is slidably installed in the hollow hole 17 of the magnetic column 13 of the second rectangular plate 12, the adjusting column 18 can move in the length direction of the hollow hole 17, and the adjusting column 18 can be inserted into the hollow hole 17 of the magnetic column 13 of the first rectangular plate 11 and the second rectangular plate 12 at the same time.

[0024] Preferably, the adjusting column 18 is sleeved with an external threaded sleeve formed by a plastic material, the hollow hole 17 of the magnetic column 13 of the second rectangular plate 12 is fixedly installed with an internal threaded sleeve threadedly matched with the external threaded sleeve, and the internal threaded sleeve is formed by a plastic material to realize the axial adjustment of the adjusting column 18.

[0025] The application No. CN202022908336.1 discloses a power transformer damping spring shock absorber, which is provided with a supporting spring, a second electromagnet and a first electromagnet. When the transformer vibrates on the shock absorber, the vibration force acts on the supporting spring, the supporting spring produces a buffering effect to weaken the transformer vibration, thereby achieving the effect of weakening noise. At the same time, the repulsive magnetic field between the first electromagnet and the second electromagnet makes the transformer vibration weaken again.

[0026] The adjusting column 18 is made of magnetic material and can be inserted into the hollow hole 17 across the first rectangular plate 11 and the second rectangular plate 12. By moving along the length direction of the hollow hole 17, the length of the magnetic column 13 is adjusted to cope with coils of different lengths and dynamically adjust according to actual needs. The adjusting column 18 of the present scheme has a completely different effect and implementation path from the disclosed patent technology, and there is no technical overlap. The structure is more simple and has higher integration. It has novelty and creativity.

[0027] The hollow hole 17 of the magnetic column 13 not only provides a moving space for the adjusting column 18, but also reduces the weight of the magnetic column 13 by 25%-30% through the hollow structure, thereby reducing the overall load of the transformer. The hollow hole 17 can be used as a natural convection channel, and the sliding side plate 190 gap is used for heat dissipation, so that the coil temperature rise is further reduced. Further, the end face of the side plate 190 is formed with a side guide groove 193, the side guide groove 193 has a side guide column 194 installed therein in a damping sliding manner, and the side guide column 194 of the first rectangular plate 11 is coaxially aligned with the side guide groove 193 of the second rectangular plate 12. Even if the magnetic attraction strength of the first rectangular plate 11 and the second rectangular plate 12 decays after long-term use, the side guide column 194 can still constrain the relative position of the upper plate and the lower plate through the groove body, avoiding the separation of the magnetic core leading to the failure of the transformer. When the length of the coil module 2 exceeds the coverage range of the side plate 190, the side guide column 194 can be lengthened from the side guide groove 193, so that the side plate 190 between the first rectangular plate 11 and the second rectangular plate 12 can be coaxially connected through the side guide column 194, ensuring that the coil module 2 is coaxially sleeved in the magnetic column 13, so as to adapt to coils of different lengths.

[0028] Further, the copper ring and the wire cake have a first inner diameter hole 27 matched with the outer diameter of the magnetic column 13, the first inner diameter hole 27 is provided with a hole diameter adjusting structure with the same diameter as the adjusting hole 14, the hole diameter adjusting structure includes a plurality of arc-shaped plates 28 movably arranged on the hole wall of the first inner diameter hole 27, the plurality of arc-shaped plates 28 are arranged at equal intervals in a ring shape in the first inner diameter hole 27, and the first compression spring 29 is connected between the arc-shaped plate 28 and the hole wall of the first inner diameter hole 27. The first compression spring 29 can drive the arc-shaped plate 28 to move radially in the first inner diameter hole 27 and elastically adhere to the magnetic column 13 or the adjusting column 18.

[0029] The fixed aperture of the conventional coil can only match a single outer diameter of the magnetic column 13, while the present scheme can realize outer diameter adaptive adjustment through the radial elastic movement of the arc-shaped plate 28. The insertion depth of the compatible adjustment column 18 can be adjusted. When the adjustment column 18 is partially inserted, the outer diameter may, due to the micro deformation of the magnetic circuit superposition, be eliminated by the elastic fitting of the arc-shaped plate 28. The first compression spring 29 drives the arc-shaped plate 28 to elastically fit with the magnetic column 13 or the adjustment column 18, so as to control the assembly gap between the coil and the magnet within 0.1 mm. Unlike the passive compensation mode of filling the gap by a gasket, the present scheme realizes dynamic gapless through active elastic fitting, and is particularly suitable for the micro deformation of the magnet under vibration or temperature change.

[0030] Further, the first connecting wires 23 and the second connecting wires 24 are respectively sleeved with Teflon sleeves. The ends of the plurality of first connecting wires 23 are connected and twisted into a first soldering part 34, and the ends of the plurality of second connecting wires 24 are connected and twisted into a second soldering part. The first connecting wires 23 of all the wire cakes 22 are gathered, the insulating sheaths are peeled off, and then twisted into a strand to form the first soldering part 34; similarly, the second connecting wires 24 of all the wire cakes 22 are gathered, the insulating sheaths are peeled off, and then twisted into a strand to form the second soldering part; Teflon has excellent dielectric properties, and after the sleeve tightly wraps the wires, it can effectively isolate adjacent wires or electrical connection with other metal parts, avoiding short circuit failure caused by wear, aging or local damage of the wire insulation layer. After the ends of the plurality of wires are gathered and twisted, the contact area between the conductors is significantly increased, and then the solder is filled into the gap and forms an integrated conductive structure, which can reduce the contact resistance to the minimum.

[0031] The PC partition plate 31 is provided with a first wiring terminal 32 and a second wiring terminal 33, the first soldering part 34 is welded and connected with the first wiring terminal 32, and the second soldering part is welded and connected with the second wiring terminal 33. The PC partition plate 31 has excellent insulation performance, and as the mounting carrier of the first wiring terminal 32 and the second wiring terminal 33, it can physically separate wiring terminals of different potentials to avoid cross-potential short circuit caused by air breakdown, dust adhesion or condensation.

[0032] The first conductive port 25 and the second conductive port 26 are conductive blocks made of copper material, the wiring board includes a plurality of copper sheet busbars 35, the copper sheet busbar 35 is formed with a conductive welding groove 36 for inserting the first conductive port 25 and the second conductive port 26; the first conductive port 25 and the second conductive port 26 protrude outward, the conductive welding groove 36 of the copper sheet busbar 35 can correspond to the plurality of first conductive ports 25 and second conductive ports 26, and after the first conductive port 25 and the second conductive port 26 are inserted into the conductive welding groove 36, the connection is realized by welding, ensuring the stability of the connection and the stability of the contact area, and the electric field is more stable during conduction.

[0033] The wiring board bottom is provided with an insulating plate 37, which is formed with an insulating guide groove 38 for the first and second conductive ports 25 and 26 to pass through; the insulating plate 37 serves as an isolation layer of the conductive ports from the equipment shell or other metal components, and can block the longitudinal electric leakage caused by condensation on the port surface or dust accumulation; the cross-sectional size of the insulating guide groove 38 matches the conductive port, and the conductive block is inserted along the insulating guide groove 38 during installation, so as to ensure the alignment accuracy of the port and the upper wiring end.

[0034] The PC partition plate 31 is formed with a plurality of fixed installation grooves 39, and the copper bus bar 35 is inserted into the fixed installation groove 39 at one end, and the copper bus bar 35 is vertically spliced with the PC partition plate 31, and the connection between the PC partition plate 31 and the copper bus bar 35 is more stable. Further increase the stability of the transformer as a whole.

[0035] The magnetic core 1 is peripherally provided with a shielding shell 4, which surrounds the first and second rectangular plates 11 and 12 and the PC partition plate 31 attached between the first and second rectangular plates 11 and 12. After the first and second rectangular plates 11 and 12 are attached to each other, only the magnetically connected structure is spliced, and the first and second rectangular plates 11 and 12 are surrounded by the shielding shell 4, and the PC partition plate 31 attached between the first and second rectangular plates 11 and 12 is also surrounded, so that the whole forms a cuboid structure, which is further stabilized; and it will not affect the normal connection of the first and second wiring ends 32 and 33 of the PC partition plate 31 with the external circuit, nor will it affect the normal connection of the copper bus bar 35 of the wiring board with the external circuit.

[0036] Preferably, the number of side plates 190 is two, and the two side plates 190 are symmetrically arranged with the magnetic column 13 as the symmetric point; the side plate 190 can protect the coil, and the coil will not be exposed, effectively shielding and covering the coil, the cross-sectional area of the magnetic column 13 is increased, and the working temperature can be lowered compared with the traditional one.

[0037] Preferably, the inner side wall of the side plate 190 is formed with an arc surface coaxially matched with the magnetic column 13, the coil wound on the magnetic column 13 is a columnar structure, and the arc surface formed by the side plate 190 is matched with the shape of the coil, which is arc-shapedly covered, further improving the covering stability.

[0038] Further, the shielding shell 4 comprises an upper shell 41 and a lower shell 42 of a semi-enclosing structure, the lower shell 42 is formed with an elastic groove 43 at an end face, the upper shell 41 is provided with an elastic connecting column 44 connected with the elastic groove 43 of the lower shell 42, the elastic groove 43 of the lower shell 42 is formed with an elastic movable hole 45 for the elastic connecting column 44 to be movably inserted, the elastic connecting column 44 is sleeved with a second tension spring 46, and the second tension spring 46 is connected with the upper shell 41 and the lower shell 42 respectively. The distance between the upper shell 41 and the lower shell 42 can be adaptively adjusted according to the length of the coil module 2, and the elastic tensioning mode is adopted to match the size of the coil module 2, so that the semi-enclosure of the transformer body is realized.

[0039] In the prior art, the shielding shell 4 is usually fixed by screws or connected rigidly by buckles. In the present scheme, when the magnetic column 13 is lengthened, i.e. the number of turns of the coil is increased, the elastic connecting column 44 is stretched upward along the elastic movable hole 45, and the surrounding space of the lower shell 42 and the upper shell 41 is slightly expanded, so that the shielding shell 4 can always completely wrap the internal components. When the adjusting column 18 is deeply inserted, the shielding shell 4 avoids extruding the internal magnet through elastic buffering, while the shielding range covers the extension area of the adjusting column 18, preventing the generation of new magnetic leakage points. When the transformer is subjected to external vibration, the second tension spring 46 first absorbs the external vibration energy, so that the vibration is not directly transmitted to the internal magnetic core and the coil. In combination with the magnetic hysteresis damping of the internal adjusting column 18 and the elastic buffering of the first compression spring 29, the overall vibration amplitude can be greatly reduced.

[0040] In addition, when the transformer is maintained, such as when the coil module 2 is replaced or the magnetic column 13 is adjusted, the traditional shielding shell 4 needs to be completely disassembled, and all the screws need to be unscrewed, which may cause the internal components to be displaced. However, in the present scheme, the upper shell 41 and the lower shell 42 only need to be pulled away from each other, at which time the first rectangular plate 11 and the second rectangular plate 12 can be separated from each other, leaving a large space. After maintenance, the lower shell 42 and the upper shell 41 are placed, and the second tension spring 46 is automatically reset and attached, without the need for recalibration of the shielding gap.

[0041] As described above, the present application has the above-mentioned excellent characteristics, and can improve the performance of the prior art and has practicality, becoming a product with high practical value.

[0042] The above content is only the preferred embodiment of the present application. Those skilled in the art can make changes in specific implementation and application range according to the idea of the present application. The content of the specification should not be understood as a limitation of the present application.

Claims

1. A small transformer with adjustable winding module, comprising a magnetic core, characterized in that: The mounting magnetic core includes a first rectangular plate and a second rectangular plate. Magnetic posts for winding are mounted on the first and second rectangular plates, and coil modules are sleeved on the magnetic posts. Each coil module includes multiple copper rings and coil discs, arranged alternately. First and second connecting wires extend outwards from the coil discs. First and second conductive ports extend from the copper rings. A terminal block and a PC partition are mounted on the mounting magnetic core. The first and second conductive ports are connected to the terminal block, and the first and second connecting wires are connected to the PC partition. The first rectangular plate and the second rectangular plate each include a plate body, and side plates are slidably installed on both sides of the plate body; a T-shaped sliding rail is formed on the inner side wall of the side plate along the length direction, and a T-shaped groove is formed on the side wall of the plate body to slide with the sliding rail, and the sliding rail and the T-shaped groove slide with damping. The plate body is also formed with an adjustment hole coaxially aligned with the magnetic column. A first threaded sleeve is fixedly installed in the adjustment hole, and a second threaded sleeve is fixedly fitted on the part of the magnetic column near the plate body. The first threaded sleeve and the second threaded sleeve are threadedly engaged to adjust the length of the magnetic column. The magnetic column is formed with a hollow structure and a hollow hole. The magnetic column of the second rectangular plate is equipped with a magnetic adjustment column. The adjustment column can move along the length of the hollow hole and can be inserted into the hollow holes of the magnetic columns of the first and second rectangular plates at the same time.

2. A small transformer with adjustable winding module according to claim 1, characterized in that: The side plate end face is formed with a side guide groove, and a side guide post is slidably mounted on the side guide groove with damping. The side guide post of the first rectangular plate is coaxially aligned with the side guide groove of the second rectangular plate.

3. A small transformer with adjustable winding module according to claim 2, characterized in that: The copper ring and the wire disc each have a first inner diameter hole adapted to the outer diameter of the magnetic post. An aperture adjustment structure for adjusting the aperture size is installed in the first inner diameter hole. The aperture adjustment structure includes multiple arc-shaped plates movably arranged on the wall of the first inner diameter hole. The multiple arc-shaped plates are arranged in a ring at equal intervals in the first inner diameter hole. A first compression spring is connected between the arc-shaped plates and the wall of the first inner diameter hole. The first compression spring can drive the arc-shaped plates to move radially within the first inner diameter hole and elastically fit against the magnetic post or adjustment post.

4. A small transformer with adjustable winding module according to claim 3, characterized in that: The first connecting wire and the second connecting wire are respectively fitted with Teflon sleeves; the ends of multiple first connecting wires converge and are twisted into a first solder section, and the ends of multiple second connecting wires converge and are twisted into a second solder section.

5. A small transformer with adjustable winding module according to claim 4, characterized in that: The PC partition is provided with a first terminal and a second terminal. The first solder part is soldered to the first terminal and grounded, and the second solder part is soldered to the second terminal and grounded.

6. A small transformer with adjustable winding module according to claim 5, characterized in that: The first conductive port and the second conductive port are conductive blocks formed by processing copper. The terminal block includes multiple copper busbars, and the copper busbars are formed with conductive welding grooves for the first conductive port and the second conductive port to be inserted.

7. A small transformer with adjustable winding module according to claim 5, characterized in that: An insulating plate is installed at the bottom of the terminal block. The insulating plate is formed with insulating guide grooves for the first conductive port and the second conductive port to pass through. The PC partition is formed with multiple fixing grooves. One end of the copper busbar is inserted into the fixing groove, and the copper busbar is perpendicularly spliced ​​with the PC partition.

8. A small transformer with adjustable winding module according to claim 1, characterized in that: The magnetic core is surrounded by a shielding shell, which encloses the first rectangular plate, the second rectangular plate, and the PC partition plate attached between the first rectangular plate and the second rectangular plate.

9. A small transformer with adjustable winding module according to claim 8, characterized in that: The shielding shell includes an upper shell and a lower shell with a semi-enclosed structure. The lower shell has an elastic groove formed on its end face. The upper shell is equipped with an elastic connecting post that is connected to the elastic groove of the lower shell. The elastic groove of the lower shell has an elastic movable hole for the elastic connecting post to be inserted. The elastic connecting post is fitted with a second tension spring, which is connected to the upper shell and the lower shell respectively.

10. A small transformer with adjustable winding module according to claim 9, characterized in that: The inner wall of the side plate is formed with an arc-shaped surface that is coaxial with the magnetic column, and the two side plates are symmetrically arranged with the magnetic column as the symmetry point.

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