Magnetic assembly and transformer

Abstract

The utility model discloses a magnetic assembly, and relates to the field of electrical equipment. The magnetic assembly comprises a magnetic core main body, a hollow framework, a primary winding and a secondary winding, wherein the magnetic core main body comprises a seat body and a middle column which are connected with each other; the hollow framework coaxially sleeves the middle column and is connected with the seat body; a plurality of partition plates are arranged on the outer side wall of the hollowed-out framework in a protruding mode and sequentially arranged at intervals in the axial direction of the hollowed-out framework, and at least two winding ring grooves are formed. And the primary winding and the secondary winding are respectively wound in different winding ring grooves. The magnetic assembly provided by the utility model is better in heat dissipation effect.

Description

Technical Field

[0001] The utility model relates to the field of electrical equipment, and in particular to a magnetic component and a transformer. Background Art

[0002] Currently, some transformers on the market are equipped with magnetic components that have a cylindrical frame mounted on the magnetic core, and then the primary winding and the secondary winding are wound on the cylindrical frame.

[0003] Such cylindrical frames generally have a flat outer surface, and when the primary winding and the secondary winding are wound on the cylindrical frame, there is a problem of poor heat dissipation. Utility Model Content

[0004] The purpose of the utility model is to provide a magnetic component, which has the characteristic of better heat dissipation effect.

[0005] Another object of the present invention is to provide a transformer having the characteristics of better heat dissipation effect and higher safety in use.

[0006] The embodiment of the present utility model provides a technical solution:

[0007] A magnetic component includes a magnetic core body, a hollow frame, a primary winding, and a secondary winding. The magnetic core body includes a base body and a center column connected to each other; the hollow frame is coaxially sleeved on the center column and connected to the base body;

[0008] A plurality of partitions are protruding from the outer wall of the hollow skeleton, and the plurality of partitions are arranged in sequence along the axial direction of the hollow skeleton to form at least two winding ring grooves; the primary winding and the secondary winding are respectively wound in different winding ring grooves.

[0009] In an optional embodiment, in the arrangement queue formed by the plurality of partitions, the protrusion heights of the two partitions at both ends relative to the outer wall of the hollow skeleton are smaller than the protrusion heights of the remaining partitions relative to the outer wall of the hollow skeleton.

[0010] In an optional embodiment, in the arrangement queue formed by the plurality of partitions, two of the partitions at both ends are provided with a clamping portion, and the hollow skeleton is clamped to the base body through the clamping portion.

[0011] In an optional embodiment, the seat body includes two bases arranged opposite to each other, and the center column is arranged between the two bases;

[0012] The seat body is provided with a heat dissipation channel, and the heat dissipation channel passes through the middle column and the two bases along the axial direction of the middle column.

[0013] In an optional embodiment, the central column is provided with a plurality of magnetic sheets stacked and arranged in sequence along its axial direction, and a heat dissipation air gap is formed between any two adjacent magnetic sheets;

[0014] The heat dissipation air gap is filled with an insulating heat-conducting gasket, and two adjacent magnetic sheets are connected via the corresponding insulating heat-conducting gaskets.

[0015] In an optional embodiment, in the arrangement queue formed by multiple magnetic sheets, a heat dissipation air gap is formed between the magnetic sheet at one end and the corresponding middle column, and the heat dissipation air gap is filled with the insulating thermally conductive gasket, and the magnetic sheet is connected to the middle column through the insulating thermally conductive gasket.

[0016] In an optional embodiment, the thickness of the magnetic sheet is between 5 mm and 20 mm, and the width of the heat dissipation gap is less than one sixth of the thickness of the magnetic sheet; and / or,

[0017] The area of the insulating thermally conductive gasket is smaller than the area of the magnetic sheet.

[0018] In an optional embodiment, corresponding positions on the two bases are provided with base gaps, and the base gaps are connected to the heat dissipation channel;

[0019] A magnetic sheet gap is provided on each magnetic sheet at a position corresponding to the base gap.

[0020] In an optional embodiment, the base gap divides the corresponding base into two independent plates, the base gap is partially filled with an air gap pad, and the two plates are connected by the air gap pad; or,

[0021] The gap in the base is completely filled with a gelatin layer, and the two plates are connected via the gelatin layer.

[0022] In an optional embodiment, the seat body further includes a side column spanning between the two bases, and the side column is spaced apart from the hollow frame;

[0023] The side columns are provided with heat dissipation grooves, which are communicated with the gaps of the base.

[0024] The present invention also provides a transformer, including the aforementioned magnetic component, the magnetic component including a magnetic core body, a hollow frame, a primary winding and a secondary winding, the magnetic core body including a base body and a center column connected to each other; the hollow frame is coaxially sleeved on the center column and connected to the base body; a plurality of partitions are protruding from the outer wall of the hollow frame, and the plurality of partitions are arranged in sequence along the axial direction of the hollow frame to form at least two winding ring grooves; the primary winding and the secondary winding are respectively wound in different winding ring grooves.

[0025] Compared to existing technologies, the magnetic assembly provided by the present invention features a hollow frame mounted on the center column. Multiple baffles protrude from the outer walls of the hollow frame to form winding grooves, with the primary and secondary windings wound separately within these grooves. In practical applications, the hollowed-out structure of the hollow frame's surface provides ventilation and heat dissipation for the primary winding within the inner layer of the secondary winding. The baffles protruding from the outer walls of the hollow frame absorb heat between the primary and secondary winding layers and transfer the absorbed heat to the outside, further enhancing heat dissipation. Therefore, the beneficial effects of the magnetic assembly provided by the present invention include: improved heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope of the present invention. Those skilled in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0027] Figure 1 A schematic diagram of a portion of the structure of a magnetic assembly provided in an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 a schematic cross-sectional view of the structure shown;

[0029] Figure 3 Schematic diagram of the structure of the hollow skeleton;

[0030] Figure 4 This is a schematic diagram of the structure in which the winding coil is wound on the hollow frame in this embodiment;

[0031] Figure 5 A schematic diagram of the structure in which a winding coil is wound on a hollow frame in another embodiment;

[0032] Figure 6 A schematic diagram of a structure in which a winding coil is wound on a hollow frame in another embodiment;

[0033] Figure 7 Schematic diagram of the structure of the seat.

[0034] Icons: 100-magnetic component; 110-magnetic core body; 111-base; 1111-base; 1112-heat dissipation channel; 1113-base gap; 1114-air gap pad; 112-middle column; 1121-magnetic sheet; 1122-heat dissipation air gap; 1123-insulating thermally conductive gasket; 1124-magnetic sheet gap; 113-side column; 1131-heat dissipation slot; 120-hollow skeleton; 121-partition; 122-winding ring groove; 123-clamping part; 130-primary winding; 140-secondary winding. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0038] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0039] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0040] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean 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, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0041] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0042] Example

[0043] Please refer to Figure 1 and Figure 2 , Figure 1 FIG. 1 is a partial structural diagram of the magnetic assembly 100 provided in this embodiment. Figure 2 FIG. 1 is a schematic cross-sectional view of a portion of the structure of the magnetic component 100 .

[0044] The magnetic component 100 provided in this embodiment includes a magnetic core body 110, a hollow skeleton 120 and a winding coil. The magnetic core body 110 includes a base body 111 and a center column 112 that are connected to each other. The hollow skeleton 120 is coaxially sleeved on the center column 112 and connected to the base body 111. The winding coil is wound on the hollow skeleton 120.

[0045] It can be understood that the hollow skeleton 120 is cylindrical and is mounted on the middle column 112 to separate the winding coil from the middle column 112. The surface of the hollow skeleton 120 has multiple openings to form a mesh structure. The winding coil is wound on the surface of the hollow skeleton 120, and the inner layer can achieve ventilation and heat dissipation through the multiple openings on the hollow skeleton 120.

[0046] Please refer to Figure 3 , Figure 3 Shown is a schematic structural diagram of the hollow skeleton 120.

[0047] In this embodiment, a plurality of partitions 121 are protruding from the outer wall of the hollow frame 120. The partitions 121 are arranged in sequence along the axial direction of the hollow frame 120, forming at least two winding ring grooves 122. The winding coil includes a primary winding 130 and a secondary winding 140, each of which is wound in a different winding ring groove 122.

[0048] It should be noted that the hollow skeleton 120 has insulation and thermal conductivity. The primary winding 130 and the secondary winding 140 are respectively wound in different winding ring grooves 122. In addition to optimizing the air duct structure through multiple openings on the surface of the hollow skeleton 120 to achieve ventilation and heat dissipation of the primary winding 130 and the secondary winding 140. The inner layer of the primary winding 130 and the secondary winding 140 can also directly transfer heat to the outer surface of the hollow skeleton 120, and the two ends of the winding can also transfer heat to the corresponding partition 121 to obtain a better heat dissipation effect. In addition, by constraining the winding method of the winding coil through the hollow skeleton 120, the leakage inductance can be effectively and accurately controlled. Without increasing the volume of the transformer, the utilization rate of the magnetic core body 110 is improved, so that the overall loss of the magnetic core body 110 is reduced.

[0049] Regarding the connection between the hollow skeleton 120 and the base body 111, in this embodiment, in the arrangement queue formed by multiple partitions 121, the two partitions 121 at both ends are provided with a clamping portion 123, and the hollow skeleton 120 is clamped to the base body 111 through the clamping portion 123.

[0050] In other words, one end of the hollow frame 120 is snap-fitted to the position on the base 111 corresponding to one end of the center column 112, and the other end of the hollow frame 120 is snap-fitted to the position on the base 111 corresponding to the other end of the center column 112. The snap-fitting of the two ends allows for quick installation and fixation of the hollow frame 120. In other embodiments, depending on actual application conditions, the hollow frame 120 can also be connected to the base 111 using other connection methods.

[0051] In this embodiment, the hollow frame 120 is spaced apart from the center column 112, forming a heat dissipation cavity between the hollow frame 120 and the outer wall of the center column 112. Heat from the magnetic core body 110, primary winding 130, and secondary winding 140 can be transferred to the hollow frame 120 and dissipated through the heat dissipation cavity.

[0052] Specifically, the heat generated by the magnetic core body 110, the primary winding 130 and the secondary winding 140 can be transferred to the heat dissipation cavity by heat conduction through the hollow skeleton 120, or by heat radiation, and then dissipated to the outside of the magnetic component 100 through the heat dissipation cavity.

[0053] Please refer to Figure 4 , Figure 4 FIG. 1 is a schematic structural diagram of a winding coil wound on a hollow frame 120 in this embodiment.

[0054] In this embodiment, there are three winding grooves 122 and two secondary windings 140. The two secondary windings 140 are respectively wound in the two winding grooves 122 at both ends of the hollow frame 120, and the primary winding 130 is wound in the winding groove 122 in the middle of the hollow frame 120.

[0055] In another embodiment, the number of winding ring slots 122 , the primary winding 130 , and the secondary winding 140 can be adjusted according to actual application conditions.

[0056] See also Figure 5 , Figure 5 FIG. 1 is a schematic structural diagram of a winding coil wound on a hollow frame 120 in another embodiment.

[0057] In this embodiment, there are four winding ring grooves 122, two primary windings 130, and two secondary windings 140. The two primary windings 130 are respectively wound in the two winding ring grooves 122 at both ends of the hollow frame 120. The two secondary windings 140 are respectively wound in the two winding ring grooves 122 in the middle of the hollow frame 120.

[0058] See also Figure 6 , Figure 6 FIG. 1 is a schematic structural diagram of a winding coil wound on a hollow frame 120 in another embodiment.

[0059] In this embodiment, there are two winding ring slots 122 and two secondary windings 140, and the primary winding 130 is wound in one of the winding ring slots 122. The two secondary windings 140 are wound in parallel in the other winding slot in a bifilar manner.

[0060] The primary winding 130 and the secondary winding 140 can be made of Litz wire, not limited to single-turn multi-strand Litz wire or multi-turn multi-strand Litz wire. In this embodiment, the multi-strand Litz wire of the primary winding 130 or the secondary winding 140 is wound horizontally within the corresponding winding ring groove 122, with two layers of winding. The two layers have opposite winding paths but the same winding direction, that is, both layers are wound clockwise or counterclockwise, to reduce parasitic distributed capacitance. In addition, the primary winding 130 and the secondary winding 140 have the same winding direction, both winding in a clockwise or counterclockwise direction.

[0061] In fact, the magnetic assembly 100 provided in this embodiment further includes a current balancing ring, which is arranged at the opposite ends of the two secondary windings 140 to achieve winding current balancing.

[0062] Please refer to Figure 7 , Figure 7 Shown is a schematic structural diagram of the base body 111.

[0063] In this embodiment, the base body 111 includes two oppositely disposed bases 1111, and the center column 112 spans between the two bases 1111. The base body 111 is provided with a heat dissipation channel 1112, which passes through the center column 112 and the two bases 1111 along the axis of the center column 112.

[0064] By providing a heat dissipation channel 1112 extending through the two bases 1111 of the base 111, heat dissipation efficiency can be improved, allowing heat within the magnetic assembly 100 to be quickly dissipated to the surrounding environment. Preferably, the heat dissipation channel 1112 in this embodiment is elliptical, corresponding to the cross-sectional shape of the center column 112. In other embodiments, the cross-sectional shape and size of the heat dissipation channel 1112 can be adjusted according to actual application conditions.

[0065] In this embodiment, the center column 112 is provided with a plurality of magnetic sheets 1121 stacked and arranged in sequence along its axial direction, with a heat dissipation gap 1122 formed between any two adjacent magnetic sheets 1121. The heat dissipation gap 1122 is filled with an insulating thermally conductive gasket 1123, and two adjacent magnetic sheets 1121 are connected by corresponding insulating thermally conductive gaskets 1123.

[0066] Multiple stacked magnetic sheets 1121 form a distributed air gap on the center column 112, enabling inductance adjustment, reducing eddy current losses caused by magnetic leakage and coil phase interference, and preventing magnetic leakage from interfering with external devices. In this embodiment, the number of magnetic sheets 1121 ranges from three to six, with a thickness between 5 mm and 20 mm. The width of the heat dissipation air gap 1122 is less than one-sixth of the thickness of the magnetic sheet 1121, and preferably less than 0.5 mm.

[0067] In this embodiment, any two adjacent magnetic sheets 1121 are connected via an insulating thermally conductive gasket 1123 therebetween, which can be connected by bonding, that is, one side of the insulating thermally conductive gasket 1123 is bonded to one of the magnetic sheets 1121 , and the other side is bonded to the other magnetic sheet 1121 .

[0068] In the arrangement queue formed by multiple magnetic pieces 1121, the heat dissipation air gap 1122 formed between the magnetic piece 1121 at one end and the middle column 112 is also filled with an insulating thermally conductive gasket 1123, that is, it is connected and separated by the insulating thermally conductive gasket 1123; while the heat dissipation air gap 1122 formed between the magnetic piece 1121 at the other end and the middle column 112 is not filled with an insulating thermally conductive gasket 1123, that is, the magnetic piece 1121 is in a suspended state to adapt to the dimensional tolerance generated when filling and bonding multiple insulating thermally conductive gaskets 1123.

[0069] The insulating thermally conductive gasket 1123 may be a boron nitride gasket or epoxy board. To increase the heat dissipation area and improve the heat dissipation effect, in this embodiment, the area of the insulating thermally conductive gasket 1123 is smaller than the area of the magnetic sheet 1121. Preferably, for any insulating thermally conductive gasket 1123, its vertical projection on the cross section of the center column 112 is within the edge trajectory of the vertical projection of the magnetic sheet 1121 on the cross section of the center column 112.

[0070] In this embodiment, in order to reduce the eddy current loss caused by leakage magnetic flux on the magnetic core body 110, base gaps 1113 are provided through the corresponding positions on the two bases 1111, and the base gaps 1113 are connected to the heat dissipation channel 1112. A magnetic sheet gap 1124 is provided through the position corresponding to the base gap 1113 on each magnetic sheet 1121.

[0071] It is understood that the base gaps 1113 on the two bases 1111 are aligned, forming a transparent heat dissipation gap on the magnetic core body 110, which can further enhance the ventilation and heat dissipation effect within the magnetic core body 110. Preferably, the base gap 1113 in this embodiment intersects with the axis of the center column 112, and the base gap 1113 passes through the heat dissipation channel 1112. The number of base gaps 1113 can be one or more, and the base gap 1113 can extend horizontally or vertically on the base 1111.

[0072] Preferably, the base gap 1113 extends from one side of the base 1111 to the opposite side, that is, the base gap 1113 divides the corresponding base 1111 into two independent plates. The base gap 1113 is partially filled with an air gap pad 1114, and the two plates are connected by the air gap pad 1114. Specifically, one side of the air gap pad 1114 can be bonded to one plate, and the other side can be bonded to the other plate, thereby achieving a connection between the two plates. Preferably, the thickness of the air gap pad 1114 in this embodiment is 0.2mm-0.5mm.

[0073] In another embodiment, the base gap 1113 can be completely filled with a gelatin layer, and the two plates are connected by the gelatin layer. Preferably, the gelatin layer is epoxy resin.

[0074] The base body 111 further includes a side column 113 spanning between the two bases 1111, and the side column 113 is spaced apart from the hollow frame 120. The side column 113 is provided with a heat dissipation groove 1131, which is connected to the base gap 1113.

[0075] In this embodiment, there are two side posts 113, which are arranged on opposite sides of the base 1111. Both side posts 113 are provided with heat dissipation slots 1131. For any base 1111, one end of its base slot 1113 extends to communicate with one of the heat dissipation slots 1131, and the other end of the base slot 1113 extends to communicate with the other heat dissipation slot 1131.

[0076] The heat dissipation slot 1131 in this embodiment is V-shaped. In other embodiments, the shape of the heat dissipation slot 1131 can be adjusted according to actual application conditions, for example, it can also be U-shaped.

[0077] It can be understood that the partition 121 on the hollow skeleton 120 is located in the gap formed between the side column 113 and the hollow skeleton 120, and the heat dissipation groove 1131 and the base gap 1113 are connected to the gap between the hollow skeleton 120 and the side column 113. The heat dissipation groove 1131 realizes radial connection between the gap and the external environment, and the base gap 1113 realizes axial connection between the gap and the heat dissipation cavity and the external environment.

[0078] In addition, the heat dissipation channel 1112 realizes axial connection between the interior of the middle column 112 and the external environment. The heat dissipation channel 1112, the base gap 1113, the heat dissipation groove 1131, the heat dissipation cavity and the gap between the hollow skeleton 120 and the side column 113 jointly realize good heat dissipation of the magnetic core body 110 and the winding coil.

[0079] In order to further improve the heat dissipation effect, in this embodiment, in the arrangement queue formed by multiple partitions 121, the protrusion height of the two partitions 121 at both ends relative to the outer wall of the hollow skeleton 120 is smaller than the protrusion height of the remaining partitions 121 relative to the outer wall of the hollow skeleton 120, so as to avoid the two partitions 121 at both ends from obstructing the axial flow of the airflow.

[0080] In summary, the magnetic assembly 100 provided in this embodiment has a better heat dissipation effect. Furthermore, because the primary winding 130 and the secondary winding 140 are respectively wound in different winding ring grooves 122, the problem of excessive radial size caused by stacking the two windings can be avoided. In other words, the magnetic assembly 100 also has a more compact structure.

[0081] In addition, this embodiment further provides a transformer, which is equipped with the aforementioned magnetic assembly 100. Benefiting from the beneficial effects of the magnetic assembly 100, the transformer provided by this embodiment also has the characteristics of better heat dissipation effect and more compact structure.

[0082] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A magnetic component, characterized in that: The invention comprises a magnetic core body (110), a hollow frame (120), a primary winding (130) and a secondary winding (140); the magnetic core body (110) comprises a base body (111) and a middle column (112) connected to each other; the hollow frame (120) is coaxially sleeved on the middle column (112) and connected to the base body (111); A plurality of partitions (121) are protruding from the outer wall of the hollow frame (120), and the plurality of partitions (121) are sequentially spaced apart along the axial direction of the hollow frame (120) to form at least two winding ring grooves (122); the primary winding (130) and the secondary winding (140) are respectively wound in different winding ring grooves (122).

2. The magnetic assembly according to claim 1, wherein: In the arrangement queue formed by the plurality of partitions (121), the protrusion heights of the two partitions (121) at the two ends relative to the outer side wall of the hollow frame (120) are smaller than the protrusion heights of the remaining partitions (121) relative to the outer side wall of the hollow frame (120).

3. The magnetic assembly according to claim 1, wherein: The seat body (111) comprises two bases (1111) arranged opposite to each other, and the center column (112) is arranged across the two bases (1111); A heat dissipation channel (1112) is provided on the seat body (111), and the heat dissipation channel (1112) penetrates the middle column (112) and the two bases (1111) along the axial direction of the middle column (112).

4. The magnetic assembly according to claim 3, wherein: The central column (112) is provided with a plurality of magnetic sheets (1121) stacked and arranged in sequence along its axial direction, and a heat dissipation air gap (1122) is formed between any two adjacent magnetic sheets (1121); The heat dissipation air gap (1122) is filled with an insulating heat-conducting gasket (1123), and two adjacent magnetic sheets (1121) are connected via the corresponding insulating heat-conducting gaskets (1123).

5. The magnetic assembly according to claim 4, wherein: In the arrangement queue formed by the plurality of magnetic sheets (1121), a heat dissipation air gap (1122) is formed between the magnetic sheet (1121) at one end and the center column (112), and the heat dissipation air gap (1122) is filled with the insulating heat-conducting gasket (1123), and the magnetic sheet (1121) is connected to the center column (112) via the insulating heat-conducting gasket (1123).

6. The magnetic assembly according to claim 4, characterized in that The thickness of the magnetic sheet (1121) is between 5 mm and 20 mm, and the width of the heat dissipation air gap (1122) is less than one-sixth of the thickness of the magnetic sheet (1121); and / or, The area of the insulating thermally conductive gasket (1123) is smaller than the area of the magnetic sheet (1121).

7. The magnetic assembly according to claim 4, characterized in that Base gaps (1113) are provided through corresponding positions on the two bases (1111), and the base gaps (1113) are communicated with the heat dissipation channels (1112); A magnetic sheet gap (1124) is provided on each magnetic sheet (1121) at a position corresponding to the base gap (1113).

8. The magnetic assembly according to claim 7, wherein: The base gap (1113) divides the corresponding base (1111) into two independent plates, the base gap (1113) is partially filled with an air gap pad (1114), and the two plates are connected via the air gap pad (1114); or, The base gap (1113) is completely filled with a gelatin layer, and the two plates are connected via the gelatin layer.

9. The magnetic assembly according to claim 7, wherein: The seat body (111) further includes a side column (113) spanning between the two bases (1111), and the side column (113) is spaced apart from the hollow frame (120); The side column (113) is provided with a heat dissipation groove (1131), and the heat dissipation groove (1131) is communicated with the base gap (1113).

10. A transformer, characterized in that: Comprising the magnetic assembly (100) according to any one of claims 1 to 9.

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