Low-eddy-current-loss transformer

Abstract

The utility model discloses a low-eddy-current-loss transformer, which belongs to the technical field of electronic components and comprises an insulating seat frame, an insulating winding support, a plurality of supporting legs, a winding, a magnetic core seat body, a magnetic core cover body and a connecting check block. The insulating running-winding support is arranged on the insulating seat frame, and the supporting feet are evenly distributed on the two side faces of the insulating seat frame. The winding is wound in the insulating winding bracket, and the winding is electrically connected with the supporting legs; the magnetic core seat body is connected with the insulating seat frame, and the magnetic core seat body is provided with a U-shaped magnetic core seat and a cylindrical magnetic core body; the U-shaped magnetic core base penetrates through the insulating base frame and is arranged on the two sides of the insulating coiling support in a striding mode, the cylindrical magnetic core body is movably arranged in the insulating coiling support in a sleeved mode, and the cylindrical magnetic core body is connected with the U-shaped magnetic core base; the magnetic core cover body is connected to the top of the U-shaped magnetic core base in a covering mode, and the connecting check block is connected with the U-shaped magnetic core base and the magnetic core cover body. The utility model solves the technical problem of how to reduce the eddy current loss of the transformer.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a low eddy current loss transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its core components include primary coil, secondary coil and iron core. The main functions of a transformer include voltage conversion, current conversion, impedance conversion, isolation and voltage stabilization.

[0003] Specifically, during the operation of the transformer, when current flows through the primary coil, a magnetic field is generated therein, and the magnetic field is transmitted to the secondary coil through the iron core. Due to the principle of electromagnetic induction, an electromotive force is generated in the secondary coil, thereby realizing voltage conversion. If the number of turns of the primary coil and the secondary coil is different, the voltage conversion ratio will also be different, thereby realizing voltage increase or decrease.

[0004] During the operation of the transformer, various losses will be generated, such as copper loss, hysteresis and eddy current loss; these losses will not only affect the working efficiency of the transformer, but may also affect the stability and safety of the system.

[0005] Based on this, Chinese patent CN112489958A discloses a new type of low-loss transformer, which includes two or more magnetic cores, coils, winding skeletons, and conductive metal terminals. The coils are wound on the winding skeletons, and the magnetic cores are made of one or more high-saturation low-loss alloy magnetic powders and insulating media, which are insulated and coated, pressed by a mold, and then cured by high-temperature baking. The initial magnetic permeability of the magnetic core is between 10 and 250, and the magnetic permeability can be adjusted by changing the ratio of the magnetic powder particle size, thereby realizing a closed magnetic circuit without air gaps. The problem of increased eddy current loss and deterioration of EMI performance caused by the air gap diffusion flux of the traditional ferrite core structure in high-frequency applications is eliminated. The transformer disclosed in this patent has the advantages of high reliability, high power density, high conversion efficiency, high saturation flux density, excellent high current resistance and EMI performance; thus, it can replace the traditional transformer ferrite air gap core structure.

[0006] However, the low-loss transformer disclosed above still has the technical problem of high eddy current loss. Specifically, the transformer disclosed above mainly realizes a closed magnetic circuit without air gap, so as to avoid the method that the traditional ferrite core structure needs to open an air gap structure in high-frequency applications. In this technical solution, the technical problems of increased eddy current loss and deterioration of EMI performance due to air gap diffusion flux will not occur. More specifically, eddy current loss is the energy loss caused by eddy currents generated by the magnetic core material inside the transformer in the alternating magnetic field. This loss will cause the transformer to heat up, reduce efficiency and increase operating costs. Generally, methods to reduce eddy current loss include: using materials with higher resistivity to make the core, coating an insulating layer on the surface of the core to reduce the eddy current loop, etc. In general, the development of low eddy current loss transformers is of great significance for improving energy utilization efficiency and saving energy. Utility Model Content

[0007] Based on this, it is necessary to provide a low eddy current loss transformer to address the technical problem of how to reduce the eddy current loss of the transformer.

[0008] A low eddy current loss transformer, comprising: an insulating frame, an insulating winding support, a plurality of legs, a winding, a magnetic core seat body, a magnetic core cover body and a connecting block; the insulating frame is provided with the insulating running winding support, and the plurality of legs are evenly distributed on the two side surfaces of the insulating frame; the winding is wound in the insulating winding support, and the winding is electrically connected to the legs; the magnetic core seat body is connected to the insulating frame, and the magnetic core seat body has a U-shaped magnetic core seat and a cylindrical magnetic core body; the U-shaped magnetic core seat passes through the insulating frame and is arranged on both sides of the insulating winding support, the cylindrical magnetic core body is movably sleeved in the insulating winding support, and the cylindrical magnetic core body is connected to the U-shaped magnetic core seat; the magnetic core cover body covers and is connected to the top of the U-shaped magnetic core seat, and the magnetic core cover body is connected to the top of the cylindrical magnetic core body; the connecting block connects the U-shaped magnetic core seat and the magnetic core cover body respectively.

[0009] Furthermore, the U-shaped magnetic core seat has a bottom plate, a side plate and an arc-shaped groove.

[0010] Furthermore, the bottom plate is connected to the insulating frame, and both ends of the bottom plate are respectively connected to one of the side plates.

[0011] Furthermore, a side wall of each side plate is correspondingly provided with an arc-shaped groove, and each arc-shaped groove is correspondingly clamped to the side surface of the insulating base frame.

[0012] Furthermore, the magnetic core cover body has a cover plate, an arc-shaped flange and an inlay portion.

[0013] Furthermore, an arc-shaped flange is respectively arranged on both end sides of the cover plate, and each arc-shaped flange is correspondingly engaged in one of the arc-shaped grooves.

[0014] Furthermore, the inlay portion is disposed in the cover plate, and the inlay portion is connected to the top of the cylindrical magnetic core body.

[0015] Furthermore, the insulating base frame has a base bridging plate, a base supporting arm and a base flange structure.

[0016] Furthermore, the base jumper plate is connected to the top between the two base support arms, and the bottom plate is connected to the bottom of the base jumper plate between the two base support arms.

[0017] Furthermore, the two base flange structures are respectively arranged on both sides of the base jumper plate, and each base flange structure is correspondingly clamped in one of the arc-shaped grooves.

[0018] In summary, the utility model low eddy current loss transformer is respectively provided with an insulating frame, an insulating winding support, a plurality of legs, a winding, a magnetic core seat body, a magnetic core cover body and a connecting block; the insulating running winding support is arranged on the insulating frame, and the plurality of legs are evenly distributed on the two side surfaces of the insulating frame; the winding is wound in the insulating winding support, and the winding is electrically connected to the legs; the magnetic core seat body is connected to the insulating frame, and the magnetic core seat body has a U-shaped magnetic core seat and a cylindrical magnetic core body; the U-shaped magnetic core seat passes through the insulating frame and is arranged on both sides of the insulating winding support, the cylindrical magnetic core body is movably sleeved in the insulating winding support, and the cylindrical magnetic core body is connected to the U-shaped magnetic core seat; the magnetic core cover body covers and is connected to the top of the U-shaped magnetic core seat, and the magnetic core cover body is connected to the top of the cylindrical magnetic core body; the connecting block respectively connects the U-shaped magnetic core seat and the magnetic core cover body. The U-shaped magnetic core seat is a U-shaped structure, and the cylindrical magnetic core body is arranged at the center of the U-shape, and the winding is arranged around the cylindrical magnetic core body with the help of the insulating coil bracket; finally, the magnetic core cover body is used to enclose the top middle of the U-shaped magnetic core seat, and at the same time, the cylindrical magnetic core body is connected to the magnetic core cover body; finally, a magnetic core structure that is not prone to relative displacement is formed, so that the magnetic flux circuit formed by the magnetic core seat body and the magnetic core cover body is complete and smooth; and then the abnormal heat generated in the magnetic core structure is controlled, and finally the purpose of reducing energy loss and reducing eddy current loss is achieved. Therefore, the utility model low eddy current loss transformer solves the technical problem of how to reduce the eddy current loss of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the low eddy current loss transformer of the utility model;

[0020] Figure 2 It is a schematic diagram of the explosion structure of the low eddy-current loss transformer of the utility model in another direction. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0027] Please also read Figure 1 to Figure 2 The utility model low eddy current loss transformer comprises: an insulating frame 1, an insulating winding support 2, a plurality of legs 3, a winding 4, a magnetic core body 5, a magnetic core cover 6 and a connecting block 7; the insulating frame 1 is provided with the insulating winding support 2, and the plurality of legs 3 are evenly distributed on the two sides of the insulating frame 1; the winding 4 is wound in the insulating winding support 2, and the winding 4 is electrically connected to the legs 3; the magnetic core body 5 is connected to the insulating frame 1, and the magnetic core body 5 has a U-shaped magnetic core seat 5 01 and a cylindrical magnetic core body 502; the U-shaped magnetic core seat 501 passes through the insulating seat frame 1 and is arranged on both sides of the insulating winding bracket 2, the cylindrical magnetic core body 502 is movably sleeved in the insulating winding bracket 2, and the cylindrical magnetic core body 502 is connected to the U-shaped magnetic core seat 501; the magnetic core cover body 6 covers and is connected to the top of the U-shaped magnetic core seat 501, and the magnetic core cover body 6 is connected to the top of the cylindrical magnetic core body 502; the connecting block 7 respectively connects the U-shaped magnetic core seat 501 and the magnetic core cover body 6.

[0028] Specifically, the magnetic core base 5 and the magnetic core cover 6 can be made of one or more alloy magnetic powders and an insulating medium, which are insulated and coated, pressed by a mold, and then cured by high-temperature baking. For example, in a feasible embodiment, the aforementioned alloy magnetic powder is composed of 85% iron, 8.2% silicon and 6.8% aluminum alloy powder to form a sendustine magnetic powder, which is insulated and coated with an insulating medium, pressed by a mold, and cured by baking at above 550°C.

[0029] Furthermore, in the existing technical solutions, the magnetic core structure usually adopts two symmetrical upper and lower parts or left and right parts, and then the frame is set in the magnetic core, and the coil is wound in the frame. In this kind of magnetic core structure, the two symmetrical parts are not easy to align during assembly and use, and are prone to mutual deviation and displacement; thus, the magnetic flux diffuses to cause energy loss, and then causes the technical problem of abnormal eddy current loss.

[0030] Correspondingly, the utility model proposes a new type of magnetic core structure for the low eddy-current loss transformer, that is, the magnetic core base body 5 and the magnetic core cover body 6 are assembled with each other to form an integral magnetic core; wherein, the magnetic core base body 5 is provided with a U-shaped magnetic core base 501 and a cylindrical magnetic core body 502; the U-shaped magnetic core base 501 is a U-shaped structure, and the cylindrical magnetic core body 502 is provided at the center of the U shape, and the winding 4 is surrounded by the cylindrical magnetic core body 502 with the aid of the insulating winding bracket 2; finally, the magnetic core cover body 6 is used to enclose the middle of the top of the U-shaped magnetic core base 501, and at the same time, the cylindrical magnetic core body 502 is connected to the magnetic core cover body 6; finally, a magnetic core structure that is not prone to relative displacement is formed, so that the magnetic flux circuit formed by the magnetic core base body 5 and the magnetic core cover body 6 is complete and smooth; thereby controlling the abnormal heat generated in the magnetic core structure, and finally achieving the purpose of reducing energy loss and reducing eddy current loss.

[0031] Furthermore, the U-shaped magnetic core seat 501 has a bottom plate 501a, a side plate 501b and an arc-shaped groove 501c; the bottom plate 501a is connected to the insulating frame 1, and the two ends of the bottom plate 501a are each connected to a side plate 501b, and each side wall of the side plate 501b is correspondingly provided with an arc-shaped groove 501c, and each arc-shaped groove 501c is correspondingly clamped to the side of the insulating frame 1.

[0032] Furthermore, the magnetic core cover body 6 has a cover plate 601, an arc-shaped flange 602 and an inlay portion 603; an arc-shaped flange 602 is provided on each end side of the cover plate 601, and each arc-shaped flange 602 is correspondingly clamped in one of the arc-shaped grooves 501c; the inlay portion 603 is provided in the cover plate 601, and the inlay portion 603 is connected to the top of the cylindrical magnetic core body 502.

[0033] Specifically, the magnetic core base body 5 is connected to the bottom of the insulating base frame 1 through the bottom plate 501a, and is respectively clamped to the two sides of the insulating base frame 1 through the arc-shaped grooves 501c provided on the side plates 501b, so that the magnetic core base body 5 is stably and accurately clamped and installed on the periphery of the insulating base frame 1 and the insulating coil support 2. Further, the magnetic core cover body 6 is clamped on the magnetic core base body 5 through the arc-shaped flange 602, and at the same time, the alignment connection of the cylindrical magnetic core body 502 is realized through the inlay part 603, thereby limiting the connection between the front and back, left and right sides of the magnetic core base body 5 and the magnetic core cover body 6. Afterwards, the connection block 7 clamps the core cover 6 and connects it to the core base 5 from above, and the cylindrical core 502 lifts the core cover 6; thus, the core cover 6 and the upper and lower sides of the core base 5 are completely connected. Finally, the core base 5 and the core cover 6 are accurately connected and relative displacement is avoided.

[0034] Furthermore, the connection block 7 is a U-shaped spring-shaped structure, which can clamp the magnetic core cover 6 on the top of the magnetic core base 5. The connection block 7 can be made of metal materials, such as brass, phosphor bronze and stainless steel, or plastic materials can be used more preferably.

[0035] Furthermore, the insulating frame 1 has a base jumper plate 101, a base support arm 102 and a base flange structure 103; the base jumper plate 101 is connected to the top between the two base support arms 102, and the bottom plate 501a is connected to the bottom of the base jumper plate 101 between the two base support arms 102; the two base flange structures 103 are respectively arranged on both sides of the base jumper plate 101, and each base flange structure 103 is correspondingly clamped in one of the arc-shaped grooves 501c.

[0036] Furthermore, the insulating winding bracket 2 has a cylindrical bracket structure 201 and a circular insulating isolation plate 202; the cylindrical bracket structure 201 is connected to the base jumper plate 101, and the cylindrical magnetic core body 502 is movably sleeved in the cylindrical bracket structure 201; the circular insulating isolation plate 202 is connected to the cylindrical bracket structure 201, and the circular insulating isolation plate 202 is clamped between the two arc-shaped grooves 501c. Specifically, the insulating winding bracket 2 can be stably limited and connected to a preset position by the magnetic core base body 5 and the arc-shaped groove 501, so as to ensure that the winding 4 always maintains a constant position in the induced magnetic field, which is conducive to avoiding abnormal eddy current loss of the transformer.

[0037] Furthermore, the winding 4 is made of a copper wire or other conductive wire, which is wound after surface insulation treatment. The winding 4 and the support leg 3 can be connected by soldering or a lead 8. The lead 8 connects the winding 4 and the support leg 3 on the insulating frame 1 respectively. A plurality of the support legs 3 can be arranged in sequence on the side of the base support arm 102. The support legs 3 are used to fix the insulating frame 1 to a circuit board or other occasions. In addition, at least two of the plurality of support legs 3 are connected to the lead 8.

[0038] In summary, the utility model low eddy current loss transformer is respectively provided with an insulating frame 1, an insulating winding support 2, a plurality of legs 3, a winding 4, a magnetic core body 5, a magnetic core cover 6 and a connecting block 7; the insulating frame 1 is provided with the insulating winding support 2, and the plurality of legs 3 are evenly distributed on the two sides of the insulating frame 1; the winding 4 is wound in the insulating winding support 2, and the winding 4 is electrically connected to the legs 3; the magnetic core body 5 is connected to the insulating frame 1, and the magnetic core body 5 has a U-shaped magnetic core The U-shaped magnetic core seat 501 and the cylindrical magnetic core body 502; the U-shaped magnetic core seat 501 passes through the insulating seat frame 1 and is arranged on both sides of the insulating winding bracket 2, the cylindrical magnetic core body 502 is movably sleeved in the insulating winding bracket 2, and the cylindrical magnetic core body 502 is connected to the U-shaped magnetic core seat 501; the magnetic core cover body 6 covers and is connected to the top of the U-shaped magnetic core seat 501, and the magnetic core cover body 6 is connected to the top of the cylindrical magnetic core body 502; the connecting block 7 respectively connects the U-shaped magnetic core seat 501 and the magnetic core cover body 6. The U-shaped magnetic core seat 501 is a U-shaped structure, and the cylindrical magnetic core body 502 is arranged at the center of the U-shape, and the winding 4 is arranged around the cylindrical magnetic core body 502 with the help of the insulating coil bracket 2; finally, the magnetic core cover body 6 is used to enclose the top middle of the U-shaped magnetic core seat 501, and at the same time, the cylindrical magnetic core body 502 is connected to the magnetic core cover body 6; finally, a magnetic core structure that is not prone to relative displacement is formed, so that the magnetic flux circuit formed by the magnetic core seat body 5 and the magnetic core cover body 6 is complete and smooth; and then the abnormal heat generated in the magnetic core structure is controlled, and finally the purpose of reducing energy loss and reducing eddy current loss is achieved. Therefore, the low eddy current loss transformer of the utility model solves the technical problem of how to reduce the eddy current loss of the transformer.

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A low eddy current loss transformer, characterized in that: It includes: Insulation A seat frame (1), an insulating winding support (2), a plurality of legs (3), a winding (4), a magnetic core seat body (5), a magnetic core cover body (6) and a connecting block (7); the insulating winding support (2) is arranged on the insulating seat frame (1), and the plurality of legs (3) are evenly distributed on the two side surfaces of the insulating seat frame (1); the winding (4) is wound in the insulating winding support (2), and the winding (4) is electrically connected to the legs (3); the magnetic core seat body (5) is connected to the insulating seat frame (1), and the magnetic core seat body (5) has a U-shaped magnetic core seat (501) and a columnar The magnetic core body (502) comprises a U-shaped magnetic core seat (501) passing through the insulating seat frame (1) and straddling the two sides of the insulating winding support (2); the cylindrical magnetic core body (502) is movably sleeved in the insulating winding support (2); the cylindrical magnetic core body (502) is connected to the U-shaped magnetic core seat (501); the magnetic core cover body (6) covers and is connected to the top of the U-shaped magnetic core seat (501); the magnetic core cover body (6) is connected to the top of the cylindrical magnetic core body (502); the connecting block (7) respectively connects the U-shaped magnetic core seat (501) and the magnetic core cover body (6).

2. The low eddy-current loss transformer according to claim 1, characterized in that: The U-shaped magnetic core seat (501) comprises a bottom plate (501a), a side plate (501b) and an arc-shaped groove (501c).

3. The low eddy-current loss transformer according to claim 2, characterized in that: The bottom plate (501a) is connected to the insulating base frame (1), and both ends of the bottom plate (501a) are respectively connected to a side plate (501b).

4. The low eddy-current loss transformer according to claim 3, characterized in that: A side wall of each side plate (501b) is correspondingly provided with an arc-shaped groove (501c), and each arc-shaped groove (501c) is correspondingly snap-connected to the side surface of the insulating base frame (1).

5. The low eddy-current loss transformer according to claim 4, characterized in that: The magnetic core cover (6) comprises a cover plate (601), an arc-shaped flange (602) and an inlay portion (603).

6. The low eddy-current loss transformer according to claim 5, characterized in that: An arc-shaped flange (602) is respectively provided on both end sides of the cover plate (601), and each arc-shaped flange (602) is correspondingly engaged in one of the arc-shaped grooves (501c).

7. The low eddy-current loss transformer according to claim 6, characterized in that: The inlay portion (603) is disposed in the cover plate (601), and the inlay portion (603) is connected to the top of the cylindrical magnetic core (502).

8. The low eddy-current loss transformer according to claim 7, characterized in that: The insulating seat frame (1) comprises a base bridging plate (101), a base supporting arm (102) and a base flange structure (103).

9. The low eddy-current loss transformer according to claim 8, characterized in that: The base jumper plate (101) is connected to the top between the two base support arms (102), and the bottom plate (501a) is connected to the bottom of the base jumper plate (101) between the two base support arms (102).

10. The low eddy-current loss transformer according to claim 9, characterized in that: The two base flange structures (103) are respectively arranged on both sides of the base bridging plate (101), and each base flange structure (103) is correspondingly clamped in one of the arc-shaped grooves (501c).

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