Magnetic core structure and transformer

Abstract

The utility model provides a magnetic core structure and a transformer. The magnetic core structure comprises a magnetic core body, a framework, at least two magnetic core gaskets and a plurality of partition plates. The magnetic core body is provided with a middle column, the framework is arranged on the peripheral side of the middle column in a sleeving mode and fixedly assembled on the magnetic core body, and the framework is used for winding a covered wire; a gap exists in the middle of the middle column in the axial direction, at least two positioning areas are arranged in the framework, and the positioning areas are located in the gap and sequentially distributed in the axial direction. The magnetic core gaskets are fixedly assembled in the positioning areas, and the magnetic core gaskets and the positioning areas are in one-to-one correspondence; every two adjacent positioning areas are separated through a partition plate, and the thickness of each partition plate is a preset value. The magnetic core gasket can be fixedly assembled through the positioning area of the framework, so that the process difficulty and the production cost can be reduced, and the feasibility of automatic processing is improved; and the position relation of the magnetic core gasket relative to the magnetic core body has uniqueness, so that the precision control of the size of the air gap of the magnetic core structure can be ensured, better consistency is kept, and the reliability is high.

Description

Technical Field

[0001] This utility model belongs to the field of inductor technology, and particularly relates to a magnetic core structure and a transformer. Background Technology

[0002] Power inductors are designed to have relatively stable inductance, low loss, and strong anti-saturation capability. The magnetic core is typically made of ferrite material. Ferrite cores have high resistivity, which suppresses eddy current generation and results in relatively low loss in high-frequency applications. However, their permeability is often quite high. When used in inductor devices, the inductance is usually adjusted by creating an air gap in the core, especially when the inductance is relatively small, requiring a larger air gap.

[0003] However, large air gaps can leak a portion of the magnetic field. When this magnetic field passes through the coil, it generates eddy currents inside the coil, increasing coil losses and potentially causing the coil to overheat and burn out. Therefore, air gap avoidance and distributed air gaps are commonly used to prevent this from happening.

[0004] Distributed air gaps divide the magnetic core body into multiple core pads, with insulating material used between the core pads to act as air gaps. This is equivalent to dividing the total air gap into multiple relatively small air gaps placed in the entire magnetic circuit. The relatively small air gaps have a smaller magnetic field and require a smaller distance to avoid the air gaps.

[0005] To achieve distributed air gaps, multiple magnetic core pads are typically stacked, with insulating material placed between each pair of pads to act as air gaps. The magnetic core pads and insulating pads are bonded together with adhesive. During stacking, positioning fixtures are required to prevent misalignment between the pads. The labor cost for stacking is relatively high, and the adhesive needs to be baked for curing, adding an extra manufacturing step. Furthermore, the adhesive bonding method for stacking results in poor precision control over the air gap size. Positioning fixtures generally allow for a certain margin, and there is a certain risk of misalignment during stacking, leading to poor product performance consistency. Utility Model Content

[0006] The technical objective of this invention is to provide a magnetic core structure and a transformer, aiming to solve the technical problems of complex manufacturing processes and poor performance consistency in the production of current inductor distributed air gaps.

[0007] To solve the above-mentioned technical problems, this utility model is implemented as follows: a magnetic core structure includes: a magnetic core body, a frame, at least two magnetic core pads, and several partitions; the magnetic core body has a central column, the frame is sleeved on the outer periphery of the central column and fixedly assembled to the magnetic core body, and the frame is used for winding the wire; there is a gap in the middle of the central column along the axial direction, and at least two positioning areas are provided in the frame, each of the positioning areas is located in the gap and is distributed sequentially along the axial direction; the magnetic core pads are fixedly assembled to the positioning areas, and the magnetic core pads and the positioning areas correspond one-to-one; The two adjacent positioning areas are separated by a partition. Further, in some embodiments, 2. the magnetic core structure according to claim 1, is characterized in that the skeleton is provided with a first matching structure at both ends along the axial direction, and the magnetic core body further includes two magnetic yokes located at both ends along the axial direction of the central column. The magnetic yokes are provided with a second matching structure, the first matching structure is connected to the second matching structure, and the first matching structure and the second matching structure correspond one-to-one. The magnetic core body and the skeleton are fixedly connected through the first matching structure and the second matching structure.

[0008] Further, in some embodiments, the first matching structure includes two first contact surfaces spaced apart circumferentially, and two protrusions located circumferentially between the two first contact surfaces and protruding axially; the second matching structure includes two second contact surfaces spaced apart circumferentially on the side of the magnetic yoke facing the skeleton, and two grooves spaced apart circumferentially on the magnetic yoke; the two first matching structures are symmetrically arranged at both ends axially, and the two second matching structures are symmetrically arranged at both ends axially; the protrusions are embedded in the grooves, and the protrusions and the grooves correspond one-to-one; the first contact surfaces abut against the second contact surfaces, and the first contact surfaces and the second contact surfaces correspond one-to-one.

[0009] Further, in some embodiments, the magnetic core body includes a first sub-magnetic core and a second sub-magnetic core arranged sequentially along the axial direction; the central column includes a first sub-central column formed on the first sub-magnetic core and a second sub-central column formed on the second sub-magnetic core, with the gap formed between the first sub-central column and the second sub-central column; the magnetic yoke includes a first sub-magnetic yoke connected to the side of the first sub-central column away from the second sub-central column and a second sub-magnetic yoke connected to the side of the second sub-central column away from the first sub-central column; the first sub-magnetic core further includes a first sub-side column disposed on the periphery of the first sub-central column, connected to the first sub-magnetic yoke, and extending towards the second sub-magnetic yoke; the second sub-magnetic core further includes a second sub-side column disposed on the periphery of the second sub-central column, connected to the second sub-magnetic yoke, and extending towards the first sub-magnetic yoke; the skeleton is disposed between the first sub-side column and the second sub-side column; the first sub-side column and the second sub-side column are fixedly connected.

[0010] Furthermore, in some embodiments, the first sub-column has a first heat dissipation channel extending axially; a first baffle is provided between the first sub-column and the magnetic core pad adjacent to the first sub-column; the first baffle has a first heat dissipation window; the first heat dissipation channel communicates with the first heat dissipation window; and / or, the second sub-column has a second heat dissipation channel extending axially; a second baffle is provided between the second sub-column and the magnetic core pad adjacent to the second sub-column; the second baffle has a second heat dissipation window; the second heat dissipation channel communicates with the second heat dissipation window.

[0011] Further, in some embodiments, a mounting groove is defined between the first baffle, the partition adjacent to the first baffle, and the inner sidewall of the frame; another mounting groove is defined between the second baffle, the partition adjacent to the second baffle, and the inner sidewall of the frame; and several other mounting grooves are defined between two adjacent partitions and the inner sidewall of the frame; one mounting groove forms a positioning area, and the frame has an opening communicating with the positioning area; the magnetic core pad and the mounting groove are interference-fitted; and / or, the magnetic core pad is located in the mounting groove, the magnetic core structure further includes a cover, the cover is connected to the frame, and the cover closes the opening; and / or, the magnetic core pad and the mounting groove are fixedly connected by adhesive dispensing.

[0012] Furthermore, in some embodiments, the magnetic core body further includes two side pillars distributed on the outer periphery of the central pillar, and the skeleton passes through the two side pillars; and, there is a gap in the radial direction between the peripheral wall of the skeleton and the side pillars; there is also a heat dissipation space between the two side pillars in the circumferential direction; and the peripheral wall of the skeleton is provided with a plurality of spaced heat dissipation holes, which connect the gap and the heat dissipation space.

[0013] Furthermore, in some embodiments, a plurality of support strips are provided on the inner side of the skeleton, and the partition is fixedly connected to the support strips.

[0014] Furthermore, in some embodiments, the inner side of the frame is provided with a plurality of slide rails spaced apart along the axial direction, the slide rails extending laterally, and the partition is movably connected to the slide rails.

[0015] Furthermore, in some embodiments, a transformer is characterized by comprising a coil and the aforementioned core structure, the coil being wound around the frame.

[0016] The magnetic core structure of this invention has the following advantages compared with related technologies:

[0017] In this invention, the magnetic core body has a central post, and a frame is fitted over the central post. The frame can be used for winding the wire. Furthermore, there is a gap in the center of the central post along the axial direction. Each positioning area within the frame is located in this gap. Magnetic core pads are fixedly assembled to the positioning areas, and adjacent positioning areas are separated by partitions. In other words, two adjacent magnetic core pads are separated by partitions, thus the partitions serve as air gaps in the magnetic core structure. Since the positioning areas are distributed along the axial direction, i.e., the magnetic core pads are distributed along the axial direction, and consequently the partitions are distributed along the axial direction, a distributed air gap can be formed. Moreover, the size of the distributed air gap can be controlled by adjusting the thickness of the partitions, ensuring precise control of the air gap size and improving practicality. Furthermore, this invention enables the fixed assembly of the magnetic core pad through the positioning area of ​​the skeleton, which not only reduces the difficulty of the process and the production cost, and improves the feasibility of automated processing, but also makes the positional relationship between the magnetic core pad and the magnetic core body unique, avoiding inductance abnormalities caused by misalignment, offset, or uneven air gap size of the magnetic core pad, thus maintaining good consistency and high reliability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the magnetic core structure in an embodiment of this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the magnetic core structure in an embodiment of this utility model;

[0021] Figure 3 This is an exploded view of the magnetic core structure in an embodiment of this utility model.

[0022] In the accompanying drawings, the reference numerals represent: 1. Magnetic core body; 11. Central column; 12. Magnetic yoke; 121. Second contact surface; 122. Groove; 13. Side column; 14. First sub-magnetic core; 141. First heat dissipation channel; 15. Second sub-magnetic core; 151. Second heat dissipation channel; 2. Skeleton; 21. Positioning area; 22. Protrusion; 23. First contact surface; 24. Opening; 25. Heat dissipation hole; 3. Magnetic core pad; 31. Heat dissipation duct; 4. Partition; 5. First baffle; 51. First heat dissipation window; 6. Second baffle; 61. Second heat dissipation window. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] Please see Figures 1 to 3 This utility model provides a magnetic core structure, including: a magnetic core body 1, a frame 2, at least two magnetic core pads 3, and several partitions 4; the magnetic core body 1 has a central column 11, the frame 2 is sleeved on the outer periphery of the central column 11 and fixedly assembled to the magnetic core body 1, and the frame 2 is used for winding the wire; there is a gap in the middle of the central column 11 along the axial direction, and at least two positioning areas 21 are provided in the frame 2, each positioning area 21 is located in the gap and is distributed sequentially along the axial direction; the magnetic core pads 3 are fixedly assembled to the positioning areas 21, and the magnetic core pads 3 and the positioning areas 21 correspond one-to-one; two adjacent positioning areas 21 are separated by a partition 4, and the thickness of the partition 4 is a preset value.

[0027] In this embodiment of the invention, the magnetic core body 1 has a central column 11, and a frame 2 is fitted over the central column 11. The frame 2 can be used for winding the wire. Furthermore, there is a gap in the center of the central column 11 along the axial direction. Each positioning area 21 within the frame 2 is located in this gap. Magnetic core pads 3 are fixedly assembled to the positioning areas 21, and adjacent positioning areas 21 are separated by partitions 4. In other words, adjacent magnetic core pads 3 are separated by partitions 4, thus the partitions 4 can serve as air gaps in the magnetic core structure. Since the positioning areas 21 are distributed along the axial direction, i.e., the magnetic core pads 3 are distributed along the axial direction, and consequently the partitions 4 are distributed along the axial direction, a distributed air gap can be formed. Moreover, the size of the distributed air gap can be controlled by controlling the thickness of the partitions 4, ensuring precise control of the air gap size and improving practicality. Furthermore, in this embodiment of the invention, the magnetic core pad 3 can be fixedly assembled through the positioning area 21 of the skeleton 2. This not only reduces the difficulty of the process and the production cost, and improves the feasibility of automated processing, but also makes the positional relationship between the magnetic core pad 3 and the magnetic core body 1 unique. This avoids inductance abnormalities caused by misalignment, offset, or uneven air gap size of the magnetic core pad 3, and can maintain good consistency and high reliability.

[0028] It should be noted that the magnetic core can be in various shapes, such as PQ, EE, EC, RM, and UU. Additionally, the frame 2 can be circular, elliptical, square, or a combination of these shapes. Furthermore, the frame 2 can be made of plastic, alumina or other ceramic materials, or other materials.

[0029] It should be noted that, Figure 2 The direction parallel to the Z-axis represents the axial direction.

[0030] In some specific embodiments, the skeleton 2 may be provided with two positioning areas 21 and a partition 4, thereby having two magnetic core pads 3.

[0031] In some specific embodiments, the skeleton 2 may be provided with four positioning areas 21 and three partitions 4, thereby having four magnetic core pads 3.

[0032] In some specific embodiments, the skeleton 2 may be provided with six positioning areas 21 and five partitions 4, thereby having six magnetic core pads 3.

[0033] Furthermore, in some embodiments, the skeleton 2 is provided with a first coordination structure at both ends along the axial direction, and the magnetic core body 1 also includes two magnetic yokes 12 located at both ends of the central column 11 along the axial direction. The magnetic yokes 12 are provided with a second coordination structure. The first coordination structure is connected to the second coordination structure, and the first coordination structure and the second coordination structure correspond one-to-one. The magnetic core body 1 and the skeleton 2 are fixedly connected through the first coordination structure and the second coordination structure.

[0034] Specifically, the magnetic core body 1 may include an upper yoke 12, a middle column 11 and a lower yoke 12 in sequence from top to bottom along the axial direction. A second coordination structure is provided on the two yokes 12 of the magnetic core body 1, so that the magnetic core body 1 has two second coordination structures. Adaptively, a first coordination structure can be provided at both ends of the frame 2 along the axial direction. That is, the frame 2 is provided with two first coordination structures corresponding to the two second coordination structures. The magnetic core body 1 and the frame 2 are fixedly connected by corresponding connection of the first coordination structure and the second coordination structure.

[0035] Further, in some embodiments, the first matching structure includes two first contact surfaces 23 spaced apart circumferentially, and two protrusions 22 located circumferentially between the two first contact surfaces 23 and protruding axially; the second matching structure includes two second contact surfaces 121 disposed on the side of the magnetic yoke 12 facing the skeleton 2 and spaced apart circumferentially, and two grooves 122 formed on the magnetic yoke 12 and spaced apart circumferentially; the two first matching structures are symmetrically arranged at both ends along the axial direction, and the two second matching structures are symmetrically arranged at both ends along the axial direction; the protrusions 22 are embedded in the grooves 122, and the protrusions 22 and the grooves 122 correspond one-to-one; the first contact surfaces 23 abut against the second contact surfaces 121, and the first contact surfaces 23 and the second contact surfaces 121 correspond one-to-one.

[0036] Specifically, at one end of the frame 2 along the axial direction, along a circumferential ring, the first alignment structure sequentially includes a first contact surface 23, a protrusion 22, another first contact surface 23, and another protrusion 22, with the protrusion 22 protruding in a direction away from the other end of the frame 2. At the other end of the frame 2, another first alignment structure is symmetrically arranged. On one of the yokes 12 of the core body 1, the second alignment structure can be the structure of the yoke 12 itself, wherein two grooves 122 are spaced apart along the circumference of the yoke 12, the curvature of the grooves 122 and the curvature of the protrusion 22 are matched, and the second contact surface 121 can be the surface of the yoke 12 facing the other yoke 12. The second alignment structure of the other yoke 12 is symmetrically arranged. In this way, one end of the frame 2 can correspond one-to-one with one of the yokes 12, and the other end of the frame 2 can correspond one-to-one with the other yoke 12. The four first contact surfaces 23 of the skeleton 2 are respectively attached to the surface of the magnetic yoke 12, and the two surfaces of the two magnetic yokes 12 are arranged opposite each other. In this way, the skeleton 2 is clamped between the two magnetic yokes 12 in the axial direction, realizing the axial positioning of the skeleton 2 relative to the magnetic core body 1. In addition, the four protrusions 22 of the skeleton 2 are respectively embedded in the four grooves 122, so that the skeleton 2 and the magnetic yoke 12 have a concave-convex fit structure in the circumferential direction, thereby realizing the circumferential positioning of the skeleton 2 relative to the magnetic core body 1. Since the skeleton 2 is sleeved on the central post 11, the radial positioning of the skeleton 2 relative to the magnetic core body 1 can be realized. In summary, the skeleton 2 and the magnetic core body 1 can be relatively fixedly assembled.

[0037] Furthermore, the magnetic yoke 12 can be installed on its own, thus simplifying the structure and reducing costs. Moreover, the magnetic core body 1 and the frame 2 can be fixedly connected through the contact surfaces and the engagement of the groove 122 and the protrusion 22, thereby reducing assembly difficulty.

[0038] Understandably, the embodiments of this utility model do not limit the circumferential extension dimensions of the two first contact surfaces 23 and the circumferential extension dimensions of the two protrusions 22. In some specific embodiments, at one end of the axial direction, for the first alignment structure, the two first contact surfaces 23 are arranged opposite each other, and the two protrusions 22 are arranged opposite each other; that is, the circumferential extension dimensions of the two first contact surfaces 23 are equal, and the circumferential extension dimensions of the two protrusions 22 are equal; while the second alignment structure of the magnetic yoke 12 can be adaptively configured. In other embodiments, the circumferential extension dimensions of the two first contact surfaces 23 may not be equal, and the circumferential extension dimensions of the two protrusions 22 may also not be equal. The relatively fixed assembly of the frame 2 and the magnetic core body 1 can still be achieved.

[0039] In some embodiments, the first and second matching structures can be other structures with convex-concave fits along the axial and circumferential directions, and the specific implementation is not limited. For example, the first matching structure can be a protruding post protruding from the skeleton 2 and in the shape of an arrow, and the second matching structure can be a through hole opened in the magnetic yoke 12. The protruding post can be inserted into the through hole, which can also achieve axial and circumferential positioning.

[0040] In some embodiments, the magnetic core body 1 may further include side posts 13, and a matching structure may be provided on the side posts 13. Adaptively, a corresponding matching structure may be provided on the periphery of the skeleton 2, so that the skeleton 2 can also be fixedly assembled to the magnetic core body 1. This will not be elaborated here.

[0041] Further, in some embodiments, the magnetic core body 1 includes a first sub-core 14 and a second sub-core 15 arranged sequentially along the axial direction; the central column 11 includes a first sub-central column 11 formed on the first sub-core 14 and a second sub-central column 11 formed on the second sub-core 15, with a gap formed between the first sub-central column 11 and the second sub-central column 11; the magnetic yoke 12 includes a first sub-magnetic yoke 12 connected to the side of the first sub-central column 11 away from the second sub-central column 11 and a yoke connected to the side of the second sub-central column 11 away from the first central column 11. The second sub-yoke 12 on one side; the first sub-core 14 also includes a first sub-side post 13 disposed around the first sub-central post 11, connected to the first sub-yoke 12 and extending toward the second sub-yoke 12, the second sub-core 15 also includes a second sub-side post 13 disposed around the second sub-central post 11, connected to the second sub-yoke 12 and extending toward the first sub-yoke 12, the skeleton 2 is disposed between the first sub-side post 13 and the second sub-side post 13; the first sub-side post 13 and the second sub-side post 13 are fixedly connected.

[0042] Specifically, along the axial direction, the top of the frame 2 is provided with a first mounting structure, which includes a first mounting position for mounting the first sub-center post 11. Multiple positioning areas 21 are provided along the middle of the axial direction. The bottom of the frame 2 includes a second mounting position for mounting the second sub-center post 11, and the bottom is provided with a second mounting structure. Additionally, the core body 1 includes two first sub-side posts 13 and two second sub-side posts 13 arranged circumferentially spaced apart, with each first and second sub-side post 13 corresponding to the other. The frame 2 is positioned between the two first and two second sub-side posts 13.

[0043] During assembly, the magnetic core pad 3 can be placed inside the frame 2 through the opening 24 first. Next, the first mounting position of the frame 2 is fitted over the first sub-center post 11, with the frame 2 positioned between the two first sub-side posts 13, and the corresponding first alignment structure is connected to the second alignment structure of the first sub-yoke 12. Then, the second sub-center post 11 is inserted through the second mounting position of the frame 2, with the frame 2 positioned between the two second sub-side posts 13, and the corresponding first alignment structure is connected to the second alignment structure of the second sub-yoke 12. Finally, the first and second sub-side posts 13 are fixedly connected, completing the assembly of the magnetic core structure. This reduces assembly difficulty and improves production efficiency.

[0044] Furthermore, in some specific embodiments, the first sub-core 14 and the second sub-core 15 can be fixedly connected by an adhesive dispensing process.

[0045] Furthermore, in some embodiments, the first sub-column 11 has a first heat dissipation channel 141 extending axially; a first baffle 5 is provided between the first sub-column 11 and the magnetic core pad 3 adjacent to the first sub-column 11; the first baffle 5 has a first heat dissipation window 51; the first heat dissipation channel 141 is connected to the first heat dissipation window 51; and / or, the second sub-column 11 has a second heat dissipation channel 151 extending axially; a second baffle 6 is provided between the second sub-column 11 and the magnetic core pad 3 adjacent to the second sub-column 11; the second baffle 6 has a second heat dissipation window 61; the second heat dissipation channel 151 is connected to the second heat dissipation window 61.

[0046] Specifically, the first sub-pillar 11 is provided with a first heat dissipation channel 141, which can reduce the temperature of the first sub-pillar 11. The second sub-pillar 11 is provided with a second heat dissipation channel 151, which can reduce the temperature of the second sub-pillar 11. In addition, the magnetic core pad 3 is located between the first sub-pillar 11 and the second sub-pillar 11. The first baffle 5 is located in the gap near the end of the first sub-pillar 11, thereby separating the first sub-pillar 11 and the magnetic core pad 3. The first baffle 5 is provided with a first heat dissipation window 51 that connects to the first heat dissipation channel 141, which can improve the heat dissipation efficiency of the first sub-pillar 11 and the magnetic core pad 3. The second baffle 6 is provided with a second heat dissipation window 61 that connects to the second heat dissipation channel 151, which can improve the heat dissipation efficiency of the second sub-pillar 11 and the magnetic core pad 3.

[0047] In addition, the first baffle 5 and the second baffle 6 can be integrally set on the frame 2, or they can be separately connected to the frame 2.

[0048] Furthermore, in some embodiments, each magnetic core pad 3 has an axially extending heat dissipation channel 31, and the heat dissipation channel 31, the first heat dissipation channel 141, and the second heat dissipation channel 151 are axially aligned. In this way, the temperature of the magnetic core pad 3 can be further reduced.

[0049] In some implementations, a third heat dissipation window connected to the heat dissipation duct 31 can be provided in the partition 4 between two adjacent magnetic core pads 3. In this way, along the axial direction, the heat from the magnetic core pads 3 can be transferred through the heat dissipation duct 31 to the third heat dissipation window, then to the first heat dissipation window 51 or the second heat dissipation window 61, and finally to the outside through the first heat dissipation channel 141 and the second heat dissipation channel 151, respectively. This improves heat dissipation efficiency.

[0050] Furthermore, in some embodiments, a mounting groove is defined between the first baffle 5, the partition 4 adjacent to the first baffle 5, and the inner wall of the frame 2; another mounting groove is defined between the second baffle 6, the partition 4 adjacent to the second baffle 6, and the inner wall of the frame 2; and several other mounting grooves are defined between two adjacent partitions 4 and the inner wall of the frame 2; a mounting groove forms a positioning area 21, and the frame 2 has an opening 24 communicating with the positioning area 21.

[0051] Specifically, along the axial direction, from the first sub-central column 11 to the second sub-central column 11, the first mounting groove is formed by the first baffle 5 and partition 4 spaced apart along the axial direction, and the inner wall of the frame 2; the middle mounting groove is formed by the partition 4 spaced adjacent along the axial direction, and the inner wall of the frame 2; the last mounting groove is formed by the second baffle 6 and partition 4 spaced apart along the axial direction, and the inner wall of the frame 2. The positioning area 21 is formed within the mounting groove, that is, the magnetic core pad 3 is assembled within the mounting groove. The mounting groove and the magnetic core pad 3 correspond one-to-one, so that the magnetic core pad 3 has a unique mounting position relative to the magnetic core body 1, which is beneficial for the installation of the magnetic core pad 3. In addition, the frame 2 also has an opening 24 connecting the positioning area 21. Therefore, the magnetic core pad 3 can be placed in the mounting groove through the opening 24, reducing the assembly difficulty. Furthermore, the heat of the magnetic core pad 3 can also be transferred to the outside through the opening 24, further reducing the temperature of the magnetic core pad 3.

[0052] Furthermore, this embodiment of the invention does not limit the specific location of the opening 24 on the frame 2. In some embodiments, the opening 24 may be parallel to the width direction of the magnetic core pad 3. This reduces the degree to which the opening 24 is open. In some embodiments, the opening 24 may also be parallel to the length direction of the magnetic core pad 3.

[0053] Understandably, the shape and size of the core pad 3 in the transverse direction are the same as those of the central post 11 of the core body 1. Therefore, the core pad 3 can be elliptical, circular, square, etc. Thus, the width direction of the core pad 3 can represent the direction with the smaller transverse dimension. And when the dimensions of the core pad 3 are equal in any transverse direction, the width direction can represent any transverse direction of the core pad 3.

[0054] Furthermore, in some specific embodiments, the magnetic core pad 3 and the mounting groove are interference-fitted.

[0055] Specifically, the thickness of the mounting groove along the axial direction can be slightly less than the thickness of the magnetic core pad 3, so that the magnetic core pad 3 and the mounting groove can be connected by interference fit, realizing a stable connection between the magnetic core pad 3 and the skeleton 2. This is simple to operate, foolproof, and can greatly reduce the difficulty of the process and improve the fault tolerance rate.

[0056] Furthermore, in some specific embodiments, the magnetic core pad 3 is located in the mounting groove, and the magnetic core structure also includes a cover, which is connected to the frame 2, and the cover closes the opening 24.

[0057] Specifically, the magnetic core pad 3 can be placed in the mounting groove through the opening 24, and then the cover can be closed to make the magnetic core pad 3 firmly clamped between the mounting groove and the cover, thereby achieving a stable connection between the core pad and the frame 2. The operation is simple, foolproof, and can greatly reduce the difficulty of the process and improve the fault tolerance rate.

[0058] Furthermore, in some feasible ways, ventilation openings can be provided on the cover, which can improve the heat dissipation effect of the magnetic core pad 3.

[0059] Furthermore, in some specific embodiments, the magnetic core pad 3 and the mounting groove are fixedly connected by adhesive dispensing. Specifically, the magnetic core pad 3 and the mounting groove can also be bonded together using an adhesive dispensing process, which is simple to operate, foolproof, and can greatly reduce the difficulty of the process and improve the error tolerance.

[0060] Furthermore, in some embodiments, the magnetic core body 1 also includes two side pillars 13 distributed on the outer periphery of the central pillar 11, and the frame 2 is inserted between the two side pillars 13; and there is a gap in the radial direction between the peripheral wall of the frame 2 and the side pillars 13; there is also a heat dissipation space between the two side pillars 13 along the circumferential direction; and a number of spaced heat dissipation holes 25 are opened on the peripheral wall of the frame 2, and the heat dissipation holes 25 connect the gap and the heat dissipation space.

[0061] Specifically, the magnetic core body 1 also includes two spaced-apart side posts 13. The frame 2 is fitted outside the central post 11 and located between the two side posts 13. The curvature of the peripheral sidewall of the frame 2 matches the inner sidewall of the side post 13. Furthermore, there is a radial gap between the peripheral sidewall of the frame 2 and the inner sidewall of the side post 13. In addition, the space between the two side posts 13 along the circumference serves as a heat dissipation space. Furthermore, the peripheral sidewall of the frame 2 has multiple heat dissipation holes 25 connecting the gap and the heat dissipation space. Additionally, the frame 2 is used to wind the coil. Thus, the heat from the magnetic core body 1, the magnetic core pad 3, and the coil can flow through the heat dissipation holes 25 to the gap and the heat dissipation space, and then flow to the outside through the heat dissipation space. Therefore, the temperature of the magnetic core and the coil can be reduced simultaneously, improving the overall performance and reliability of the inductor.

[0062] Furthermore, in some embodiments, a plurality of support strips are provided on the inner side of the frame 2, and the partition 4 is fixedly connected to the support strips.

[0063] Specifically, the support bar can be positioned between the frame 2 and the central column 11, ensuring that the central column 11 is centrally located within the frame 2. Furthermore, the support bar increases the strength of the frame 2, enabling it to withstand greater compressive forces. Additionally, the partition 4 is fixedly connected to the support bar, and adjacent partitions 4 can be positioned at the top and bottom of the support bar along the axial direction. This allows the distance between the two partitions 4 to be determined by adjusting the height of the support bar. The partitions 4 also serve as clearance air gaps, thus allowing adjustment of the spacing between adjacent clearance air gaps in the magnetic core.

[0064] Furthermore, in some embodiments, the inner side of the frame 2 is provided with a plurality of slide rails spaced apart along the axial direction, the slide rails extend laterally, and the partition 4 is movably connected to the slide rails.

[0065] Specifically, the partition 4 can be fixed inside the frame 2 through the movable connection between the partition 4 and the slide rail. In addition, the distance between the two partitions 4 can be determined by setting the distance between two adjacent slide rails along the axial direction. The partition 4 can also serve as an air gap, so the spacing between two adjacent air gaps of the magnetic core can be adjusted.

[0066] Furthermore, in some embodiments, a transformer includes a coil and a core structure, with the coil wound around a frame 2.

[0067] In this embodiment of the invention, the magnetic core body 1 has a central column 11, a frame 2 is sleeved on the central column 11, and a coil is wound around the frame 2 to form a transformer. Furthermore, a gap exists in the center of the central column 11 along the axial direction. Each positioning area 21 within the frame 2 is located in this gap. Magnetic core pads 3 are fixedly assembled to the positioning areas 21, and adjacent positioning areas 21 are separated by partitions 4. In other words, adjacent magnetic core pads 3 are separated by partitions 4, thus the partitions 4 can serve as air gaps in the magnetic core structure. Since the positioning areas 21 are distributed along the axial direction, i.e., the magnetic core pads 3 are distributed along the axial direction, and consequently the partitions 4 are distributed along the axial direction, a distributed air gap can be formed. Furthermore, the size of the distributed air gap can be controlled by adjusting the thickness of the partitions 4, improving practicality. Furthermore, in this embodiment of the invention, the magnetic core pad 3 can be fixedly assembled through the positioning area 21 of the skeleton 2. This not only reduces the difficulty of the process and the production cost, and improves the feasibility of automated processing, but also makes the positional relationship between the magnetic core pad 3 and the magnetic core body 1 unique. This ensures the precise control of the air gap size of the magnetic core structure, maintains good consistency, and has high reliability.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0069] The above is a description of the technical solution provided by this utility model. For those skilled in the art, based on the idea of ​​the embodiments of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A magnetic core structure, characterized in that, include: The magnetic core body, the frame, at least two magnetic core pads, and several partitions; The magnetic core body has a central column, and the skeleton is sleeved on the outer periphery of the central column and fixedly assembled to the magnetic core body. The skeleton is used for winding the wire. There is a gap in the middle of the central column along the axial direction. At least two positioning areas are provided in the skeleton. Each positioning area is located in the gap and is distributed sequentially along the axial direction. The magnetic core pad is fixedly assembled to the positioning area, and the magnetic core pad and the positioning area correspond one-to-one. The two adjacent positioning areas are separated by a partition, the thickness of which is a preset value.

2. The magnetic core structure according to claim 1, characterized in that, The skeleton is provided with a first matching structure at both ends along the axial direction. The magnetic core body also includes two magnetic yokes located at both ends of the central column along the axial direction. The magnetic yokes are provided with a second matching structure. The first matching structure is connected to the second matching structure, and the first matching structure and the second matching structure correspond one-to-one. The magnetic core body and the skeleton are fixedly connected through the first matching structure and the second matching structure.

3. The magnetic core structure according to claim 2, characterized in that, The first alignment structure includes two first contact surfaces spaced apart in the circumferential direction, and two protrusions located between the two first contact surfaces in the circumferential direction and protruding in the axial direction; the second alignment structure includes two second contact surfaces spaced apart in the circumferential direction on the side of the magnetic yoke facing the skeleton, and two grooves opened on the magnetic yoke and spaced apart in the circumferential direction. The two first matching structures are symmetrically arranged at both ends along the axial direction, and the two second matching structures are symmetrically arranged at both ends along the axial direction; the protrusion is embedded in the groove, and the protrusion and the groove correspond one-to-one; the first contact surface abuts against the second contact surface, and the first contact surface and the second contact surface correspond one-to-one.

4. The magnetic core structure according to claim 1, characterized in that, The magnetic core body includes a first sub-core and a second sub-core arranged sequentially along the axial direction; the central column includes a first sub-central column formed on the first sub-core and a second sub-central column formed on the second sub-core, with the gap formed between the first sub-central column and the second sub-central column; the magnetic yoke includes a first sub-yoke connected to the side of the first sub-central column away from the second sub-central column and a second sub-yoke connected to the side of the second sub-central column away from the first central column; the first sub-core further includes a first sub-side column disposed on the periphery of the first sub-central column, connected to the first sub-yoke, and extending towards the second sub-yoke; the second sub-core further includes a second sub-side column disposed on the periphery of the second sub-central column, connected to the second sub-yoke, and extending towards the first sub-yoke; the skeleton is disposed between the first sub-side column and the second sub-side column; the first sub-side column and the second sub-side column are fixedly connected.

5. The magnetic core structure according to claim 4, characterized in that, The first sub-center column has a first heat dissipation channel that extends along the axial direction; a first baffle is provided between the first sub-center column and the magnetic core pad adjacent to the first sub-center column; the first baffle has a first heat dissipation window; the first heat dissipation channel is connected to the first heat dissipation window; And / or, The second sub-column has a second heat dissipation channel that runs through the axis; a second baffle is provided between the second sub-column and the magnetic core pad adjacent to the second sub-column; the second baffle has a second heat dissipation window; the second heat dissipation channel is connected to the second heat dissipation window.

6. The magnetic core structure according to claim 5, characterized in that, A mounting groove is defined between the first baffle, the partition adjacent to the first baffle, and the inner wall of the frame; another mounting groove is defined between the second baffle, the partition adjacent to the second baffle, and the inner wall of the frame; and several other mounting grooves are defined between two adjacent partitions and the inner wall of the frame; one mounting groove forms a positioning area, and the frame has an opening communicating with the positioning area; The magnetic core pad and the mounting groove are interference-fitted. And / or, the magnetic core pad is located in the mounting groove, and the magnetic core structure further includes a cover, which is connected to the skeleton and covers the opening; And / or, the magnetic core pad and the mounting groove are fixedly connected by adhesive dispensing.

7. The magnetic core structure according to claim 1, characterized in that, The magnetic core body also includes two side pillars distributed on the outer periphery of the central pillar, and the skeleton passes through the two side pillars; and there is a gap in the radial direction between the peripheral wall of the skeleton and the side pillars; there is also a heat dissipation space between the two side pillars in the circumferential direction; the peripheral wall of the skeleton is provided with a number of spaced heat dissipation holes, and the heat dissipation holes connect the gap and the heat dissipation space.

8. The magnetic core structure according to claim 1, characterized in that, The inner side of the frame is provided with several support bars, and the partition is fixedly connected to the support bars.

9. The magnetic core structure according to claim 1, characterized in that, The inner side of the frame is provided with several slide rails that are spaced apart along the axial direction. The slide rails extend laterally, and the partition is movably connected to the slide rails.

10. A transformer, characterized in that, It includes a coil and a core structure as described in any one of claims 1 to 9, wherein the coil is wound around the frame.

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