Magnetic integrated high-efficiency transformer with adjustable built-in magnetic core

Abstract

The invention discloses a magnetic integrated type high-efficiency transformer with an adjustable built-in magnetic core, and particularly relates to the technical field of transformers. After insulating spacers with different thicknesses are switched to corresponding positions, the insulating spacers are driven to move downwards in the vertical direction under the action of thrust, so that the insulating spacers gradually extend into a coil framework, and the magnetic integrated type high-efficiency transformer with the adjustable built-in magnetic core is formed; when the insulating spacer is inserted downwards, the thickness of the insulating spacer forces the movable magnetic cores on the left side and the right side to synchronously move towards the two sides in a separated mode, and as the movable magnetic cores move towards the two sides, the equivalent distance between the movable magnetic cores and the corresponding magnetic circuit closing part is increased, so that the equivalent air gap of a magnetic circuit in the transformer is increased, the magnetic resistance of the magnetic circuit is increased, and the equivalent magnetic conductivity is reduced. When the input voltage rises and the magnetic flux density is increased, the increasing trend of the magnetic flux density of the magnetic core is reduced by increasing the air gap; the transformer has the stepped magnetic core adjusting capacity, and magnetic circuit parameters can be conveniently adapted according to actual working conditions.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, specifically to a magnetically integrated high-efficiency transformer with an adjustable built-in magnetic core. Background Technology

[0002] With the development of server power supplies, automotive power supplies, communication power supplies, and high-power-density switching power supplies, transformers are evolving towards higher frequencies, smaller sizes, higher efficiency, and higher power density. In LLC resonant, phase-shifted full-bridge, and various isolated DC-DC topologies, magnetic components typically not only perform voltage transformation but are also closely related to the parameters of the magnetizing inductor, resonant inductor, or filter inductor. Therefore, the size, losses, and parameter consistency of magnetic components often directly affect the overall efficiency, temperature rise, and power density. Existing magnetically integrated transformers typically integrate transformer and inductor units by sharing a magnetic circuit, sharing a core column, or integrating them within a single core structure to reduce the number of components, shrink the size, and improve flux utilization and efficiency.

[0003] In existing magnetically integrated high-efficiency transformers, the internal magnetic circuit air gap is usually a fixed structure during operation, making it difficult to flexibly adjust according to the input voltage range, load changes, or design requirements. When the input voltage increases and the magnetic flux density increases, it is easy to cause core saturation, which in turn affects the transformer's conversion efficiency, operational stability, and service life. Some adjustable structures also suffer from unstable adjustment processes and difficulty in resetting moving parts. Summary of the Invention

[0004] The purpose of this invention is to provide a magnetically integrated high-efficiency transformer with an adjustable built-in magnetic core to solve the problems mentioned in the background art.

[0005] The main technical problem solved by this invention is: It is difficult to make flexible adjustments according to the input voltage range, load changes or design requirements, which affects the conversion efficiency of the transformer. Some adjustable structures have unstable adjustment processes and difficulty in resetting moving parts.

[0006] This invention can be achieved through the following technical solutions: A magnetically integrated high-efficiency transformer with an adjustable built-in magnetic core includes a base, a hollow coil frame is mounted on the upper surface of the base, and a protective shell mounted on the base covers the coil frame. The outer surface of the coil frame is fitted with a primary coil and a secondary coil on both sides respectively, and the inner sides of the coil frame are movably provided with moving magnetic cores. The upper surface of the coil frame is provided with an entrance that communicates with the interior of the base. The inner wall of the protective shell is equipped with a rotating shaft driven by a built-in drive motor. Three sleeves are installed on the outer surface of the rotating shaft. Each sleeve is internally connected with insulating gaskets of different thicknesses. The end of each insulating gasket is provided with a pointed cone. An insulating pad that remains vertical is located directly above the inlet. Both sides of the sleeve plate are provided with slots, and a limiting push block that is fixed to the end face of the insulating pad is slidably provided inside the slot. The protective shell is equipped with an adjustment and lifting unit. The adjustment and lifting unit includes two sliding plates that move closer or further away from each other along the inner wall of the protective shell. Each sliding plate is equipped with an electric cylinder on its upper surface, and a positioning part is installed below the sliding plate by the corresponding electric cylinder. The positioning part is in contact with the upper end surface of the limiting push block. Both sides of the insulating pad are in contact with the end face of the moving magnetic core that extends into the coil frame.

[0007] A further technical improvement of the present invention is that: each insulating pad is provided with a limiting seat at one end that extends into the inner cavity of the sleeve plate, the limiting seat is fixed with the limiting push blocks on both sides, and a spring is sleeved at one end that extends into the inner cavity of the sleeve plate, the end of the spring being fixed to the inner cavity of the sleeve plate.

[0008] A further technical improvement of the present invention is that the adjusting lifting unit also includes a screw on the inner wall of one end of the protective shell and a limiting rail on the inner wall of the other end of the protective shell. The screw is driven by an internal servo motor and has a positive thread and a negative thread. A slide block is threaded onto both the positive thread and the negative thread. The end face of the slide block is fixed to the corresponding sliding plate. Both sliding plates slide in a limited manner with the limiting rail.

[0009] A further technical improvement of the present invention is that: each of the limiting push blocks has a positioning groove on its upper surface; The positioning part is engaged with the positioning groove on the corresponding side.

[0010] A further technical improvement of the present invention is that: a connecting plate is fixed to the end face of each of the moving magnetic cores, and a mating seat is fixed to the middle of the upper and lower surfaces of the connecting plate; The top surface of the inner cavity of the protective shell and the bottom surface of the base are provided with sliding grooves. Each sliding groove is movably connected to a retaining seat that engages with the docking seat. A second spring is installed at one end of the retaining seat that extends into the sliding groove, and the second spring is fixed to the inner wall of the sliding groove.

[0011] A further technical improvement of the present invention is that: both sides of the coil frame are provided with limiting units, the limiting units include mounting seats provided on the side of the coil frame and near the middle, a positioning cylinder is installed at the side end of the coil frame, the mounting seats and the positioning cylinder are arranged parallel to each other, and magnetic edge posts of different thicknesses are installed inside the mounting seats and the positioning cylinder for limiting.

[0012] A further technical improvement of the present invention is that: the inner wall surfaces of the mounting base and the positioning cylinder are both provided with a reset groove, and an abutment is installed inside the reset groove for limiting the installation; a spring is installed on the side of the abutment facing the reset groove. One side surface of the abutting member is provided with an abutting slope that contacts the magnetic edge post, and the inner side surface of the abutting member is provided with an abutting plane at one end adjacent to the abutting slope.

[0013] A further technical improvement of the present invention is that: the bottom surface of the coil frame is provided with a mounting bracket connected to the base in the middle, and both ends of the bottom surface of the coil frame are provided with mounting pins.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. After switching the insulating pads of different thicknesses to the corresponding positions, the lifting unit starts to operate. The two sliding plates move synchronously along the inner wall of the protective shell to the set position. An electric cylinder drives the corresponding positioning part to move, causing the positioning part to contact the upper surface of the limiting push block and push the limiting push block. Under the thrust, the insulating pad moves vertically downwards, gradually extending into the coil frame. When the insulating pad is inserted downwards, its thickness forces the moving magnetic cores on both sides to move synchronously to the sides. As the moving magnetic cores move to the sides, the equivalent distance between the moving magnetic cores and the corresponding closed parts of the magnetic circuit increases, thereby increasing the equivalent air gap of the transformer's internal magnetic circuit, increasing the magnetic reluctance, and decreasing the equivalent permeability. When the input voltage increases and the magnetic flux density increases, the increase in air gap reduces the growth trend of the magnetic flux density of the magnetic core. Different thickness insulating pads are switched to the working position according to different input voltage ranges, different load conditions, or different design requirements. Thicker insulating pads can push the moving magnetic cores on both sides to produce a larger separation displacement, thereby creating a larger air gap adjustment range; thinner insulating pads correspond to a smaller adjustment range, enabling the transformer to have a stepped magnetic core adjustment capability, which facilitates the adaptation of magnetic circuit parameters according to actual operating conditions. 2. By setting a retainer that mates with the connecting plate, during the insertion of the insulating pad, spring one, which is fitted onto the end of the insulating pad, is compressed. Spring one acts as a buffer and returns the insulating pad to its original position. At this time, the moving magnetic core moves to both sides, and the connecting plate, which is fixed to the end face of the moving magnetic core, moves synchronously. The mating seat set in the middle of the upper and lower surfaces of the connecting plate also moves accordingly, causing the retainer to slide along the sliding groove. After the insulating pad is removed, spring one releases its elastic force, pushing the insulating pad upward out of the coil frame. Meanwhile, spring two releases its elastic restoring force, pushing the retainer to slide in the opposite direction along the sliding groove. Through the mating seat and the connecting plate, the corresponding moving magnetic core is driven to return to its original position in the middle, thereby ensuring the stability, reversibility, and reusability of the entire adjustment process. 3. When the magnetic edge post is inserted inward, the inclined surface of the abutment member inside the positioning cylinder applies a pushing force, causing the abutment member to overcome the elastic force of spring three and move towards the inside of the reset slot, thus providing clearance space for the magnetic edge post to be installed, until it reaches the mounting base and contacts the abutment member inside it. A pushing force is applied to the abutment member inside the mounting base, causing the abutment member to overcome the elastic force of spring three and move towards the inside of the reset slot, facilitating the installation of the magnetic edge post. After the magnetic edge post is inserted into place, the abutment members in the positioning cylinder and the mounting base are reset under the elastic restoring force of the corresponding spring three, and abut against the surface of the magnetic edge post through the abutment plane, thus forming a stable clamp and limit for the magnetic edge post. By setting magnetic edge posts of different thicknesses, the magnetic circuit parameters of the return magnetic path on both sides of the coil frame are changed; at the same time, in conjunction with the position change of the moving magnetic core inside the coil frame, the overall magnetic circuit structure of the transformer can be adjusted, thereby improving the transformer's adaptability to different input conditions and different magnetic parameter requirements. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the installation structure of the sleeve plate and the rotating shaft of the present invention; Figure 4 This is a schematic diagram of the installation structure of the sliding plate and the sliding base of the present invention; Figure 5 This is a schematic diagram of the mounting structure of the card holder of the present invention; Figure 6 This is a schematic diagram of the installation structure of the abutment component of the present invention.

[0017] In the diagram: 1. Base; 2. Protective shell; 3. Primary coil; 4. Secondary coil; 5. Coil frame; 6. Mounting base; 7. Positioning cylinder; 8. Magnetic edge post; 9. Moving magnetic core; 10. Connecting plate; 11. Rotating shaft; 12. Sleeve plate; 13. Slot; 14. Limiting push block; 15. Insulating gasket; 16. Conical part; 17. Inlet; 18. Nodal part; 19. Spring 1; 20. Positioning groove; 21. Screw; 22. Slide; 23. Positioning part; 24. Sliding plate; 25. Limiting rail; 26. Electric cylinder; 27. Card seat; 28. Sliding groove; 29. ​​Spring 2; 30. Abutment part; 31. Spring 3. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0019] Please see Figures 1-6 As shown, the present invention provides a magnetically integrated high-efficiency transformer with adjustable built-in magnetic core, including a base 1, a hollow coil frame 5 mounted on the upper surface of the base 1, and a protective shell 2 mounted on the base 1 covering the coil frame 5. The outer surface of the coil frame 5 is fitted with a primary coil 3 and a secondary coil 4 on both sides respectively, and the inner sides of the coil frame 5 are movably provided with moving magnetic cores 9. The upper surface of the coil frame 5 is provided with an entrance 17 that communicates with the interior of the base 1. The inner wall of the protective shell 2 is equipped with a rotating shaft 11 driven by a built-in drive motor. Three sleeves 12 are installed on the outer surface of the rotating shaft 11. Each sleeve 12 is internally limited and connected with an insulating gasket 15 of different thickness. The end of the insulating gasket 15 is provided with a pointed cone 16. The insulating pad 15, which is kept vertical, is located directly above the inlet 17. Both sides of the sleeve plate 12 are provided with slots 13. A limiting push block 14, which is fixed to the end face of the insulating pad 15, is slidably provided inside the slots 13. The protective shell 2 is equipped with an adjustment and lifting unit. The adjustment and lifting unit includes two sliding plates 24 that move closer or further away from each other along the inner wall of the protective shell 2. Each sliding plate 24 is equipped with an electric cylinder 26 on its upper surface, and a positioning part 23 that is pushed by the corresponding electric cylinder 26 is installed below the sliding plate 24. The positioning part 23 is in contact with the upper end surface of the limiting push block 14. Both sides of the insulating pad 15 are in contact with the end face of the moving magnetic core 9 that extends into the coil frame 5.

[0020] During operation, the ends of the moving magnetic cores 9 on both sides enter and fit into the coil frame 5. When it is necessary to adjust the internal magnetic circuit parameters of the transformer, the built-in drive motor first drives the rotating shaft 11 to rotate, causing the insulating pad 15 of the required thickness to rotate to a vertical position, i.e. Figure 3 In the state shown, the insulating pad 15 is located directly above the inlet 17. Since the insulating pad 15 has a pointed cone 16 at its end, the pointed cone 16 can act as a guide when the insulating pad 15 enters the inlet 17 downwards, thereby facilitating the accurate insertion of the insulating pad 15 into the coil frame 5, reducing insertion resistance and avoiding jamming. After the insulating pad 15 is switched to the corresponding position, the adjusting lifting unit starts to operate. That is, the two sliding plates 24 move synchronously along the inner wall of the protective shell 2 to the set position. The electric cylinder 26 drives the corresponding positioning part 23 to move, so that the positioning part 23 contacts the upper end surface of the limiting push block 14 and pushes the limiting push block 14. Under the action of the thrust, the insulating pad 15 is driven to move downward in the vertical direction, so that the insulating pad 15 gradually extends into the coil frame 5. When the insulating pad 15 is inserted downward, its thickness will force the moving magnetic cores 9 on the left and right sides to move synchronously to the sides. As the moving magnetic cores 9 move to the sides, the equivalent distance between the moving magnetic cores 9 and the corresponding magnetic circuit closure part increases, thereby increasing the equivalent air gap of the magnetic circuit inside the transformer, increasing the magnetic reluctance of the magnetic circuit, and decreasing the equivalent permeability. When the input voltage increases and the magnetic flux density increases, the increase in the magnetic flux density of the magnetic core is reduced by increasing the air gap, thereby reducing the possibility of the magnetic core entering the saturation state and ensuring that the transformer can still maintain a relatively stable working state under high input voltage conditions.

[0021] Because the outer surface of the rotating shaft 11 is provided with multiple sleeves 12, and each sleeve 12 is limited and connected with insulating pads 15 of different thicknesses, the insulating pads 15 of different thicknesses can be switched to enter the working position according to different input voltage ranges, different load conditions, or different design requirements. Thicker insulating pads 15 can push the moving magnetic cores 9 on both sides to produce a larger separation displacement, thereby forming a larger air gap adjustment amount; thinner insulating pads 15 correspond to a smaller adjustment amount. This gives the transformer a stepped magnetic core adjustment capability, which is convenient for adapting the magnetic circuit parameters according to actual operating conditions.

[0022] When the input voltage returns to normal or when it is no longer necessary to increase the air gap, the adjusting lifting unit drives the insulating pad 15 upward out of the coil frame 5, and the insulating pad 15 disengages from the pressing contact with the end face of the moving magnetic core 9. The moving magnetic core 9 then resets, and the two moving magnetic cores 9 on both sides move back to the center and return to their initial positions, thereby restoring the transformer magnetic circuit to its original air gap state, ensuring that the device can achieve reversible adjustment and reuse under different operating conditions.

[0023] See Figure 3As shown, each insulating pad 15 is movably provided with a limiting seat at one end of its extension into the inner cavity of the sleeve plate 12. The limiting seat is fixed with the limiting push blocks 14 on both sides. A spring 19 is sleeved at one end of the insulating pad 15 that extends into the inner cavity of the sleeve plate 12. The end of the spring 19 is fixed to the inner cavity of the sleeve plate 12. The coil frame 5 has a gap 18 in the middle.

[0024] When the rotating shaft 11 drives the sleeve 12 to rotate, the insulating pad 15 rotates synchronously with the sleeve 12 and maintains a stable position with the cooperation of the limiting seat, the limiting push block 14 and the slot 13. Since the limiting push block 14 slides in the slot 13, it can guide and limit the movement direction of the limiting seat and the insulating pad 15, thereby preventing the insulating pad 15 from deflecting, shaking or dislodging during the movement.

[0025] When the insulating pad 15 is pushed and extends downward into the coil frame 5, the insulating pad 15 causes the limiting seat to move relative to each other in the cavity inside the sleeve plate 12, and compresses the spring 19. At this time, the spring 19 plays a role in buffering and elastic support, which can reduce the rigid impact generated during the insertion of the insulating pad 15 and improve the stability when the insulating pad 15 contacts the end faces of the moving magnetic cores 9 on both sides.

[0026] When the external pushing force is released and the insulating pad 15 exits the working position, the spring 19 releases its elastic restoring force, pushing the limiting seat and the insulating pad 15 back to the initial position, so that the insulating pad 15 can automatically return to its original position, preparing for the next switching and adjustment. At the same time, the limiting push block 14 continues to play a guiding role in the slot 13 to ensure that the return process is smooth and reliable.

[0027] See Figure 3 and Figure 4 As shown, the adjusting lifting unit also includes a screw 21 on the inner wall of one end of the protective shell 2 and a limiting rail 25 on the inner wall of the other end of the protective shell 2. The screw 21 is driven by an internal servo motor, and the screw 21 is provided with a positive thread and a negative thread. A slide block 22 is threaded onto both the positive thread and the negative thread. The end face of the slide block 22 is fixed to the corresponding sliding plate 24. Both sliding plates 24 are limited to slide with the limiting rail 25. Each limiting push block 14 has a positioning groove 20 on its upper surface; The positioning part 23 is engaged with the positioning groove 20 on the corresponding side.

[0028] After the insulating pad 15 rotates to the corresponding position, the adjusting lifting unit begins to work. That is, the servo motor inside the protective shell 2 drives the screw 21 to rotate, and the slide blocks 22 sleeved on both sides of the screw 21 move synchronously towards the center under the action of thread transmission. During the movement, the corresponding sliding plate 24 moves synchronously. At the same time, the sliding plate 24 maintains stable sliding under the guiding and limiting action of the limiting rail 25, thereby avoiding skew and improving synchronization and reliability.

[0029] When the two sliding plates 24 move to the predetermined position, the electric cylinder 26 installed on the upper surface of each sliding plate 24 is activated, pushing the positioning part 23 below to move downward. After the positioning part 23 moves downward, it engages with the positioning groove 20 on the corresponding side, forming a stable position for the corresponding limiting push block 14, and reliably transmitting the thrust of the electric cylinder 26 to the limiting push block 14.

[0030] Since the limiting push block 14 is fixed to the limiting seat, when the positioning part 23 presses down on the limiting push block 14, it can drive the limiting seat and the insulating pad 15 to move together in a predetermined direction. At this time, under the guidance of the pointed cone part 16, the insulating pad 15 extends downward into the coil frame 5 through the inlet 17.

[0031] As the insulating pad 15 gradually enters the coil frame 5, its two side surfaces come into contact with the end faces of the moving magnetic cores 9 on both sides of the coil frame 5. The pad's thickness exerts a compressive force on the moving magnetic cores 9, causing them to move synchronously in opposite directions. This increases the distance between the moving magnetic cores 9, increases the equivalent air gap in the transformer's internal magnetic circuit, increases the magnetic reluctance, and decreases the equivalent permeability.

[0032] Therefore, when the input voltage is high and the magnetic flux density inside the core tends to increase, the moving core 9 can be pushed apart by inserting an insulating pad 15 of appropriate thickness, thereby increasing the air gap and reducing the risk of core saturation. Furthermore, since the sleeve 12 is equipped with multiple insulating pads 15 of different thicknesses, insulating pads 15 of different thicknesses can be selected according to different input voltage ranges and operating conditions to achieve graded adjustment of the core air gap.

[0033] See Figure 1 and Figure 5 As shown, each moving magnetic core 9 has a connecting plate 10 fixed to its end face, and a docking seat is fixed to the middle of the upper and lower surfaces of the connecting plate 10. The top surface of the inner cavity of the protective shell 2 and the bottom surface of the base 1 are provided with sliding grooves 28. Each sliding groove 28 is movably connected to a locking seat 27 that engages with the docking seat. A spring 29 is installed at one end of the locking seat 27 that extends into the sliding groove 28. The spring 29 is fixed to the inner wall of the sliding groove 28.

[0034] When the moving magnetic core 9 moves to both sides, the connecting plate 10 fixed to the end face of the moving magnetic core 9 moves synchronously. The mating seats provided in the middle of the upper and lower surfaces of the connecting plate 10 also move accordingly, and respectively drive the card holder 27 located in the sliding groove 28 on the top surface of the inner cavity of the protective shell 2 and the bottom surface of the base 1 to slide along the sliding groove 28. Since the card holder 27 and the sliding groove 28 are movably connected, the card holder 27 will compress the spring 29 at its corresponding end during the movement.

[0035] Therefore, spring 29 plays an elastic buffering and energy storage role when the moving magnetic core 9 is pushed out. On the one hand, it can reduce the rigid impact of the moving magnetic core 9 during the movement process, and on the other hand, it can provide the restoring driving force during the subsequent reset process, making the movement of the moving magnetic core 9 more stable and reliable.

[0036] Meanwhile, during the insertion of the insulating pad 15, the spring 19 fitted at the end of the insulating pad 15 is compressed. The spring 19 acts as a buffer and returns the insulating pad 15 to its original position, preventing the insulating pad 15 from experiencing excessive impact or unstable movement when pressed down.

[0037] When the input voltage returns to normal or the need to increase the air gap is no longer required, the electric cylinder 26 moves the positioning part 23 upward, causing the positioning part 23 to disengage from the positioning groove 20. Subsequently, the servo motor drives the screw 21 to rotate in the opposite direction, causing the two sliding plates 24 to reset. As the external downward pressure is released, the spring 19 releases its elastic force, pushing the insulating pad 15 upward out of the coil frame 5.

[0038] After the insulating pad 15 is removed, the previously compressed spring 29 simultaneously releases its elastic restoring force, pushing the retainer 27 to slide in the opposite direction along the sliding groove 28. The retainer 27 then drives the corresponding moving magnetic core 9 back to its center position through the mating seat and connecting plate 10. As a result, the two moving magnetic cores 9 return to their initial positions, and the internal magnetic circuit of the transformer returns to its original air gap state, ensuring the stability, reversibility, and reusability of the entire adjustment process.

[0039] See Figure 1 and Figure 6 As shown, both sides of the coil frame 5 are provided with limiting units. The limiting unit includes a mounting seat 6 located on the side of the coil frame 5 and near the center. A positioning cylinder 7 is installed at the side end of the coil frame 5. The mounting seat 6 and the positioning cylinder 7 are arranged parallel to each other. Magnetic edge posts 8 of different thicknesses are installed inside the mounting seat 6 and the positioning cylinder 7 for limiting.

[0040] The inner walls of the mounting base 6 and the positioning cylinder 7 are both provided with inward reset grooves. An abutment 30 is installed inside the reset groove for limiting the movement. A spring 31 is installed on the side of the abutment 30 facing the reset groove. One side surface of the abutting member 30 is provided with an abutting slope that contacts the magnetic edge post 8, and one end of the inner side surface of the abutting member 30 adjacent to the abutting slope is provided with an abutting plane.

[0041] According to actual needs, different specifications of magnetic edge posts 8 are selected and assembled between the mounting base 6 and the positioning cylinder 7 to change the magnetic flux distribution and magnetic resistance state of the magnetic circuit on both sides of the coil frame 5. In addition, the multiple magnetic edge posts 8 installed are of the same size to ensure the consistency and symmetry of the magnetic circuit structure on both sides. During the insertion of the magnetic edge post 8, the magnetic edge post 8 first contacts the abutment 30 in the reset groove inside the positioning cylinder 7. When the magnetic edge post 8 is inserted inward, it applies a pushing force to the abutment 30 through the abutment inclined surface, causing the abutment 30 to overcome the elastic force of the spring 31 and move inward to the reset groove, thereby providing space for the insertion of the magnetic edge post 8.

[0042] After the magnetic edge post 8 abuts against the abutting plane, it continues to be inserted until it reaches the mounting base 6 and contacts the abutting part 30 inside. A pushing force is applied to the abutting part 30 in the mounting base 6, causing the abutting part 30 to overcome the elastic force of the spring 31 and move towards the inside of the reset groove, which facilitates the insertion of the magnetic edge post 8. After the magnetic edge post 8 is inserted into place, the positioning cylinder 7 and the abutting part 30 in the mounting base 6 are reset under the elastic restoring force of the corresponding spring 31, and abut against the surface of the magnetic edge post 8 through the abutting plane, thereby forming a stable clamp and limit for the magnetic edge post 8, which can adapt to the installation of magnetic edge posts 8 of different thicknesses and prevent the magnetic edge post 8 from loosening, shifting or falling off during operation.

[0043] By setting magnetic side posts 8 of different thicknesses, the magnetic circuit parameters of the return magnetic paths on both sides of the coil frame 5 are changed; at the same time, in conjunction with the position change of the moving magnetic core 9 inside the coil frame 5, the overall magnetic circuit structure of the transformer can be adjusted, thereby improving the transformer's adaptability to different input conditions and different magnetic parameter requirements.

[0044] See Figure 1 As shown, the bottom surface of the coil frame 5 is provided with a mounting bracket connected to the base 1 in the middle, and both ends of the bottom surface of the coil frame 5 are provided with mounting pins.

[0045] By connecting to an external circuit via mounting pins, current is input to the primary coil 3, where an alternating magnetic field is formed under the action of the magnetic core assembly. Magnetic flux coupling is achieved through the internal moving magnetic core 9, magnetic edge pillars 8, and other magnetic circuit structures, causing the secondary coil 4 to generate an induced output.

[0046] In use, this invention involves switching insulating pads 15 of different thicknesses to their corresponding positions, then adjusting the lifting unit to activate. This involves two sliding plates 24 synchronously approaching the set position along the inner wall of the protective shell 2. An electric cylinder 26 drives the corresponding positioning part 23 to move, causing the positioning part 23 to contact the upper surface of the limiting push block 14 and push the limiting push block 14. Under this thrust, the insulating pads 15 move downwards vertically, gradually extending into the coil frame 5. As the insulating pads 15 are inserted downwards, their thickness forces the moving magnetic cores 9 on both sides to move synchronously to the sides. As the moving magnetic cores 9 move to the sides, the equivalent distance between the moving magnetic cores 9 and the corresponding closed magnetic circuit increases, thereby increasing the equivalent air gap in the transformer's internal magnetic circuit, increasing the magnetic reluctance, and decreasing the equivalent permeability. When the input voltage increases and the magnetic flux density increases, the increase in the air gap reduces the growth trend of the magnetic flux density. Depending on different input voltage ranges, load conditions, or design requirements, insulating pads 15 of different thicknesses are switched to enter the working position. Thicker insulating pads 15 can push the moving magnetic cores 9 on both sides to produce a larger separation displacement, thus creating a larger air gap adjustment range; thinner insulating pads 15 correspond to a smaller adjustment range. This enables the transformer to have a stepped magnetic core adjustment capability, making it easy to adapt the magnetic circuit parameters according to actual operating conditions; By setting a retainer 27 that mates with the connecting plate 10, during the insertion of the insulating pad 15, the spring 19 fitted on the end of the insulating pad 15 is compressed. The spring 19 acts as a buffer and returns the insulating pad 15 to its original position. At this time, the moving magnetic core 9 moves to both sides, and the connecting plate 10 fixed on the end face of the moving magnetic core 9 moves synchronously. The mating seat set in the middle of the upper and lower surfaces of the connecting plate 10 also moves accordingly, causing the retainer 27 to slide along the sliding groove 28. After the insulating pad 15 is removed, the spring 19 releases its elastic force, pushing the insulating pad 15 upward out of the coil frame 5. Meanwhile, the spring 29 releases its elastic restoring force, pushing the retainer 27 to slide in the opposite direction along the sliding groove 28. Through the mating seat and the connecting plate 10, the corresponding moving magnetic core 9 is driven to return to its original position in the middle, thereby ensuring the stability, reversibility and reusability of the entire adjustment process. When the magnetic edge post 8 is inserted inward, the inclined surface of the abutment member 30 inside the positioning cylinder 7 applies a pushing force, causing the abutment member 30 to overcome the elastic force of the spring 31 and move towards the inside of the reset groove, thus providing clearance space for the insertion of the magnetic edge post 8, until it reaches the mounting base 6 and contacts the abutment member 30 inside it. A pushing force is then applied to the abutment member 30 inside the mounting base 6, causing the abutment member 30 to overcome the elastic force of the spring 31 and move towards the inside of the reset groove, facilitating the insertion of the magnetic edge post 8. After the magnetic edge post 8 is inserted into place, the positioning cylinder 7 and the mounting base 6... The inner abutment 30 is reset under the elastic restoring force of the corresponding spring 31, and abuts against the surface of the magnetic side post 8 through the abutment plane, thereby forming a stable clamp and limit on the magnetic side post 8. By setting magnetic side posts 8 of different thicknesses, the magnetic circuit parameters of the return magnetic path on both sides of the coil frame 5 are changed; at the same time, in conjunction with the position change of the moving magnetic core 9 inside the coil frame 5, the overall magnetic circuit structure of the transformer can be adjusted, thereby improving the transformer's adaptability to different input conditions and different magnetic parameter requirements.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A magnetically integrated high-efficiency transformer with an adjustable built-in magnetic core, comprising a base (1), wherein a hollow coil frame (5) is mounted on the upper surface of the base (1), characterized in that: The coil frame (5) is covered with a protective shell (2) mounted on the base (1). The outer surface of the coil frame (5) is fitted with a primary coil (3) and a secondary coil (4) on both sides respectively, and the inner sides of the coil frame (5) are provided with movable magnetic cores (9). The upper surface of the coil frame (5) is provided with an entrance (17) that communicates with the interior of the base (1). The inner wall of the protective shell (2) is equipped with a rotating shaft (11) driven by a built-in drive motor. Three sleeves (12) are installed on the outer surface of the rotating shaft (11). Each sleeve (12) is internally limited by an insulating gasket (15) of different thickness. The end of the insulating gasket (15) is provided with a pointed cone (16). The insulating pad (15) is positioned vertically above the inlet (17). Both sides of the sleeve plate (12) are provided with slots (13). A limiting push block (14) fixed to the end face of the insulating pad (15) is slidably provided inside the slot (13). The protective shell (2) is equipped with an adjustment and lifting unit. The adjustment and lifting unit includes two sliding plates (24) that move closer or further away from each other along the inner wall of the protective shell (2). Each sliding plate (24) has an electric cylinder (26) installed on its upper surface. A positioning part (23) is installed below the sliding plate (24) and is pushed by the corresponding electric cylinder (26). The positioning part (23) is in contact with the upper end face of the limiting push block (14). Both sides of the insulating pad (15) are in contact with the end face of the moving magnetic core (9) that extends into the coil frame (5).

2. The magnetically integrated high-efficiency transformer with an adjustable built-in magnetic core according to claim 1, characterized in that, Each insulating pad (15) is provided with a limiting seat at one end of its extension into the cavity of the sleeve plate (12). The limiting seat is fixed to the limiting push blocks (14) on both sides. A spring (19) is fitted at one end of the insulating pad (15) its extension into the cavity of the sleeve plate (12). The end of the spring (19) is fixed to the cavity of the sleeve plate (12).

3. The magnetically integrated high-efficiency transformer with an adjustable built-in magnetic core according to claim 1, characterized in that, The adjustment and lifting unit also includes a screw (21) on the inner wall of one end of the protective shell (2) and a limiting rail (25) on the inner wall of the other end of the protective shell (2). The screw (21) is driven by an internal servo motor and has a positive thread and a negative thread. A slide block (22) is threaded onto both the positive thread and the negative thread. The end face of the slide block (22) is fixed to the corresponding sliding plate (24). Both sliding plates (24) slide relative to the limiting rail (25).

4. The magnetically integrated high-efficiency transformer with adjustable built-in magnetic core according to claim 1, characterized in that, Each of the aforementioned limiting push blocks (14) has a positioning groove (20) on its upper surface; The positioning part (23) is engaged with the positioning groove (20) on the corresponding side.

5. A magnetically integrated high-efficiency transformer with an adjustable built-in magnetic core according to claim 1, characterized in that, Each of the moving magnetic cores (9) has a connecting plate (10) fixed to its end face, and a docking seat is fixed to the middle of the upper and lower surfaces of the connecting plate (10); The top surface of the inner cavity of the protective shell (2) and the bottom surface of the base (1) are provided with sliding grooves (28). Each sliding groove (28) is movably connected to a locking seat (27) that engages with the docking seat. A spring (29) is installed at one end of the locking seat (27) that extends into the sliding groove (28). The spring (29) is fixed to the inner wall of the sliding groove (28).

6. The magnetically integrated high-efficiency transformer with adjustable built-in magnetic core according to claim 1, characterized in that, The coil frame (5) has a limiting unit on both sides. The limiting unit includes a mounting seat (6) located on the side of the coil frame (5) and near the middle. A positioning cylinder (7) is installed at the side end of the coil frame (5). The mounting seat (6) and the positioning cylinder (7) are arranged in parallel. Magnetic edge posts (8) of different thicknesses are installed inside the mounting seat (6) and the positioning cylinder (7).

7. A magnetically integrated high-efficiency transformer with an adjustable built-in magnetic core according to claim 6, characterized in that, The inner wall surfaces of the mounting base (6) and the positioning cylinder (7) are provided with a reset groove facing inward. An abutment (30) is installed inside the reset groove for limiting the movement. A spring (31) is installed on the side of the abutment (30) facing the reset groove. The abutment (30) has an abutment slope on one side surface that contacts the magnetic edge post (8), and the abutment (30) has an abutment plane on one end of its inner side surface adjacent to the abutment slope.

8. A magnetically integrated high-efficiency transformer with an adjustable built-in magnetic core according to claim 1, characterized in that, The bottom surface of the coil frame (5) is provided with a mounting bracket connected to the base (1) in the middle, and mounting pins are provided at both ends of the bottom surface of the coil frame (5).

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