Magnetic core integrated low-loss high-frequency transformer winding frame

Abstract

The utility model discloses a low loss high frequency transformer winding skeleton of magnetic core integration, including first winding unit, can with second winding unit lateral plug -in cooperation, make two magnetic core holes mutual parallel, and two form mutual limit force along the magnetic core hole length direction at plug -in cooperation place, still including third winding unit, can along the length direction insert the magnetic core hole of second winding unit, and the end of third winding unit and second winding unit can card mounting cooperation, make two form mutual limit force along the magnetic core hole length direction at card mounting cooperation place, the magnetic core hole of first winding unit is first mounting hole, and the magnetic core hole of third winding unit separation second winding unit is second mounting hole and third mounting hole, the port of three mounting holes can be inserted simultaneously to the magnetic core, and the inserted part can form limit force along three mounting hole arrangement direction to three winding units. The utility model strengthens the overall strength of low loss high frequency transformer winding skeleton.

Description

Technical Field

[0001] This utility model relates to the field of high-frequency transformer technology, and in particular to a low-loss high-frequency transformer winding bobbin with integrated magnetic core. Background Technology

[0002] The transformer winding bobbin is a crucial component of a transformer. The bobbin structure of high-frequency transformers is relatively complex. One-piece injection molding is prone to cracking and damage due to stress concentration. Currently available assembled bobbin structures suffer from poor vibration resistance and are prone to loosening, especially in low-loss high-frequency transformers, which typically have more complex winding relationships and correspondingly more complex bobbin structures. Therefore, it is necessary to improve the assembly strength of the winding bobbin for low-loss high-frequency transformers to extend their service life. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a low-loss high-frequency transformer winding skeleton with integrated magnetic core, which enhances the overall strength of the low-loss high-frequency transformer winding skeleton.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a core-integrated low-loss high-frequency transformer winding frame, comprising a first winding unit capable of laterally inserting into a second winding unit such that their core holes are parallel to each other, and that they form a mutual limiting force along the length direction of the core holes at the insertion point; and a third winding unit capable of being inserted into the core hole of the second winding unit along its length direction, and that the ends of the third winding unit and the second winding unit can be snapped together, forming a mutual limiting force along the length direction of the core holes at the snap-fit ​​point; the core hole of the first winding unit is a first mounting hole, and the third winding unit separates the core hole of the second winding unit into a second mounting hole and a third mounting hole, with the second mounting hole located between the first mounting hole and the third mounting hole; the core can be simultaneously inserted into the ports of the three mounting holes, and the inserted portion can form a limiting force on the three winding units along the arrangement direction of the three mounting holes.

[0005] Furthermore, the magnetic core includes two magnetic core units, which can be inserted and installed from the two ends of the three mounting holes respectively, and the ends are spliced ​​together to form a closed-loop magnetic circuit. The width of the magnetic core unit is adapted to the width of the mounting hole.

[0006] Furthermore, each magnetic core unit is integrally bent from a single magnetic conductor.

[0007] Furthermore, the portion of the magnetic core unit inserted into the second mounting hole has a U-shaped structure, and the two legs of the U-shaped structure tend to separate relative to each other.

[0008] Furthermore, the portion of the two magnetic core units inserted into the third mounting hole is the first mating section, and the ends of the two first mating sections are spliced ​​together. A shim is inserted into the third mounting hole on the side away from the third winding unit. The shim can generate a lateral thrust at the splice of the two first mating sections, so that the end faces of the two mating sections fit together.

[0009] Furthermore, the third winding unit is slidably disposed in the core hole of the second winding unit and slides along the arrangement direction of the three mounting holes. When the shim is inserted into the third mounting hole, the third winding unit can clamp the second winding unit into a U-shaped structure.

[0010] Furthermore, the portions of the two magnetic core units inserted into the first mounting hole can overlap each other in their own thickness direction to form an overlapping structure, and respectively fit against the two opposite hole walls of the first mounting hole.

[0011] Beneficial Effects: This utility model's core-integrated low-loss high-frequency transformer winding frame, designed for multi-winding low-loss high-frequency transformers, sets up an independent winding unit for each winding. Through the inter-assembly relationship between multiple winding units, basic positioning and assembly are achieved, along with partial directional degree of freedom restriction. Furthermore, the magnetic core collaboratively constrains multiple winding units, achieving complete limiting and fixing, and providing a certain degree of seismic resistance, thus improving the overall assembly strength of the winding frame. Therefore, it firstly avoids the cracking and damage problems caused by complex one-piece injection molding structures, and secondly avoids the problems of poor seismic performance and easy loosening inherent in common assembled frame structures. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a three-dimensional assembly structure of one embodiment of the winding skeleton of this utility model;

[0013] Figure 2 for Figure 1 A schematic cross-sectional view of the magnetic core assembly plane in the embodiment. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] As attached Figure 1-2 The core-integrated low-loss high-frequency transformer winding frame includes a first winding unit 1, which can be laterally inserted into a second winding unit 2, such that the core holes of the two are parallel to each other, and the two form a mutual limiting force along the length direction of the core holes at the insertion point; for example, corresponding plug-in and slot structures are respectively provided on the opposite sides of the first winding unit 1 and the second winding unit 2. When the plug-in is inserted into the slot, the slot can form an axial limiting force around the plug-in insertion direction, so that the two only have a degree of freedom to be separated relatively in the insertion direction.

[0016] It also includes a third winding unit 3, which can be inserted into the core hole of the second winding unit 2 along its length direction, and the ends of the third winding unit 3 and the second winding unit 2 can be engaged, so that the two form a mutual limiting force along the length direction of the core hole at the engagement point; since the third winding unit and the second winding unit are in a relative nested relationship, the engagement of the two can be realized at the corresponding ends, which also makes the two have a degree of freedom of relative movement in only one direction, and this direction is consistent with the relative insertion direction of the first and second winding units.

[0017] The first winding unit 1 has a first mounting hole 11 for its magnetic core. The third winding unit 3 separates the second winding unit 2's magnetic core hole into a second mounting hole 21 and a third mounting hole 22, with the second mounting hole 21 located between the first mounting hole 11 and the third mounting hole 22. The magnetic core 4 can be inserted into the ports of all three mounting holes simultaneously, and the inserted portion can exert a limiting force on the three winding units along the arrangement direction of the three mounting holes. Finally, the specially designed magnetic core structure is integrated with the assembled skeleton, and the only degree of freedom of the skeleton structure is constrained, thereby completely limiting and fixing the entire winding skeleton, preventing it from easily loosening.

[0018] The magnetic core 4 includes two magnetic core units 41, which can be inserted and installed from the two ends of the three mounting holes respectively, and the ends are spliced ​​together to form a closed-loop magnetic circuit. The width of the magnetic core unit 41 is adapted to the width of the mounting hole. Since the three magnetic core mounting holes formed after the three winding units are assembled are parallel to each other and the ends are flush, each magnetic core unit can correspond to the same side of the three mounting holes and simultaneously form an insertion relationship with the ports of the three mounting holes. For the part of the magnetic core unit inserted into the mounting hole, it fits and conforms to the mounting hole in the width direction, forms mutual extrusion force in the thickness direction, and opposes mutual static friction force in the length direction. This makes the magnetic core unit locked and limited in the three mounting holes, so that the magnetic core is not easy to fall out relative to the skeleton structure. Moreover, the locked magnetic core part also forms a constraint force on the insertion direction of the skeleton structure, preventing the skeleton structure from loosening.

[0019] Since the middle part of the winding unit is usually the winding area, the insertion positions of the first winding unit and the second winding unit are also located at both ends. The constraint force formed by the insertion ports of the two magnetic core units acts exactly in the direction of the three winding units being assembled together, thereby maximizing the constraint effect.

[0020] Each magnetic core unit 41 is integrally bent from a separate magnetic conductor. This enhances the constraint strength at the frame assembly point. Preferably, the magnetic core unit 41 is integrally bent from permalloy material, which has excellent magnetic permeability and low energy loss.

[0021] The portion of the magnetic core 41 that inserts into the second mounting hole 21 is a U-shaped structure 411, and the two legs of the U-shaped structure 411 tend to separate relative to each other. This allows the two legs to exert a pushing force on the hole wall after the U-shaped structure 411 is inserted into the second mounting hole 21, thereby increasing the static friction by increasing the normal force, making it less likely for the inserted portion to come out relative to the mounting hole.

[0022] The portions of the two magnetic core units 41 inserted into the third mounting hole 22 form the first mating section 412. The ends of the two first mating sections 412 are spliced ​​together. A shim 5 is inserted into the third mounting hole 22 on the side away from the third winding unit 3. The shim 5 can generate a lateral thrust at the splice of the two first mating sections 412, so that the end faces of the two first mating sections 412 fit together. Preferably, the shim 5 is also a magnetic conductor, which can increase the magnetic flux, reduce leakage inductance, and thus reduce losses. The second winding unit and the third winding unit respectively wind coils with different numbers of turns and share the same magnetic core portion to achieve different voltage outputs. At the same time, it can allow the heat of the winding on the third winding unit to be transferred to the outside through the magnetic core, promote heat dissipation of the secondary coil, and extend the service life of the transformer.

[0023] The third winding unit 3 is slidably disposed within the core hole of the second winding unit 2 and slides along the arrangement direction of the three mounting holes. When the shim 5 is inserted into the third mounting hole 22, the third winding unit 3 can clamp the U-shaped structure 411 with the second winding unit 2. This allows the shim 5, the two spliced ​​first mating sections 412, the third winding unit with the coil wound on it, and the two U-shaped structures 411 to be stacked in the same direction within the core hole of the second winding unit. The core structures on both sides can form a relative clamping force on the third winding unit in the middle, and are constrained by the hole walls on both sides, thereby completely constraining the position of the third winding unit within the core hole of the second winding unit, ensuring the stability of the structure. The compression causes the two legs of the U-shaped structure 411 to fit together, thereby making the insertion fit more shock-resistant and improving the strength of the flat mounting. Preferably, the shim 5 is made of the same material as the core unit 41.

[0024] The area on the magnetic core unit that connects multiple insertion parts is the connecting part. When the two legs of the U-shaped structure 411 are pressed together, its two ends can form a traction force on the connecting parts on both sides. With the structure inside the magnetic core hole of the second winding unit completely limited, the part of the magnetic core unit 41 inserted into the first mounting hole 11 can pull the first winding unit and the second winding unit together.

[0025] The portions of the two magnetic core units 41 inserted into the first mounting hole 11 can overlap each other in their thickness direction to form an overlapping structure 413, and respectively conform to the two opposite hole walls of the first mounting hole 11. Preferably, the two magnetic core units 41 adopt the same structure, with the portion of one magnetic core unit 41 inserted into the first mounting hole 11 conforming to the outer hole wall and maintaining a perpendicular bending relationship with the connecting part. By setting a limiting block 6 on the side of the outer hole wall away from the insertion end, the end face of the limiting block 6 at the inner end of the hole is a vertical end face, used to limit the insertion depth of the former, and the end face at the outer end is an inclined guide surface 61, so that when the end of the other magnetic core unit is inserted into the first mounting hole 11, it can be driven to bend inward along the guide surface, and thus conform to the inner hole wall surface. This allows the overlapping structure formed by the overlap to generate a lateral thrust on the inner and outer hole walls, thereby enhancing the static friction with the hole walls and preventing slippage and loosening. A reinforcing rib is formed in the corner piece of the connection between the magnetic core unit 41 inserted into the first mounting hole 11 and the connecting part, making the corner stronger.

[0026] The above are merely preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A low-loss high-frequency transformer winding bobbin with integrated magnetic core, characterized in that: It includes a first winding unit (1) that can be laterally inserted into a second winding unit (2) such that the core holes of the two are parallel to each other, and the two form a mutual limiting force along the length direction of the core hole at the insertion point; It also includes a third winding unit (3), which can be inserted into the core hole of the second winding unit (2) along the length direction, and the ends of the third winding unit (3) and the second winding unit (2) can be engaged, so that the two form a mutual limiting force along the length direction of the core hole at the engagement point; The magnetic core hole of the first winding unit (1) is the first mounting hole (11). The third winding unit (3) separates the magnetic core hole of the second winding unit (2) into the second mounting hole (21) and the third mounting hole (22). The second mounting hole (21) is located between the first mounting hole (11) and the third mounting hole (22). The magnetic core (4) can be inserted into the ports of the three mounting holes at the same time, and the inserted part can form a limiting force on the three winding units along the arrangement direction of the three mounting holes.

2. The core-integrated low-loss high-frequency transformer winding bobbin according to claim 1, characterized in that: The magnetic core (4) includes two magnetic core units (41), which can be inserted and installed from the two ends of the three mounting holes respectively, and the ends are spliced ​​together to form a closed-loop magnetic circuit. The width of the magnetic core unit (41) is adapted to the width of the mounting hole.

3. The core-integrated low-loss high-frequency transformer winding bobbin according to claim 2, characterized in that: Each magnetic core unit (41) is formed by bending a single magnetic conductor.

4. The core-integrated low-loss high-frequency transformer winding bobbin according to claim 3, characterized in that: The portion of the magnetic core unit (41) inserted into the second mounting hole (21) is a U-shaped structure (411), and the two legs of the U-shaped structure (411) tend to separate relative to each other.

5. The core-integrated low-loss high-frequency transformer winding bobbin according to claim 4, characterized in that: The portion of the two magnetic core units (41) inserted into the third mounting hole (22) is the first mating section (412). The ends of the two first mating sections (412) are spliced ​​together. A shim (5) is inserted into the third mounting hole (22) on the side away from the third winding unit (3). The shim (5) can generate a lateral thrust at the splice of the two first mating sections (412), so that the end faces of the two first mating sections (412) fit together.

6. The core-integrated low-loss high-frequency transformer winding bobbin according to claim 5, characterized in that: The third winding unit (3) is slidably disposed in the core hole of the second winding unit (2) and slides along the arrangement direction of the three mounting holes. When the gasket (5) is inserted into the third mounting hole (22), the third winding unit (3) can clamp the U-shaped structure (411) with the second winding unit (2).

7. The core-integrated low-loss high-frequency transformer winding bobbin according to claim 6, characterized in that: The portions of the two magnetic core units (41) inserted into the first mounting hole (11) can overlap each other in their own thickness direction to form an overlapping structure (413), and respectively fit against the two opposite hole walls of the first mounting hole (11).

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