Magnetic element and electrical equipment

Abstract

The embodiment of the utility model discloses a magnetic element and electrical equipment, and relates to the technical field of vehicle-mounted power supplies. The magnetic element includes a magnetic core structure and a winding structure. The magnetic core structure comprises a middle column and a plurality of side columns, the side columns are arranged in the circumferential direction of the middle column in a surrounding mode, and every two adjacent side columns are matched with each other to form a window. The winding structure comprises a plurality of windings which are stacked in sequence, the multiple windings are all arranged on the middle column in a sleeving mode, and at least one winding extends outwards along the window so as to form heat dissipation fins located outside the window. According to the magnetic element, the winding is used as a heat conductor and extends out of the window, so that the heat dissipation area is increased, the heat dissipation condition of the winding in the window is improved, and the heat dissipation effect is improved. The electrical equipment has all the beneficial effects of the magnetic element.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted power supplies, in particular to a magnetic element and electrical equipment. Background Art

[0002] Magnetic components are the core components of vehicle power supply, which play the role of energy conversion and level conversion. The winding of magnetic components is generally made of copper wire. When current flows through the winding of magnetic components, according to the thermal effect principle of current, the winding will generate heat, and its size is positively correlated with the square of the current and the winding impedance. The secondary winding current of the transformer in the vehicle-mounted high-voltage DCDC converter is large, which is very easy to generate a lot of heat. At the same time, as power supply technology develops towards high frequency, high efficiency and high power density, the size of magnetic components is getting smaller and smaller, which further deteriorates the heat dissipation environment of the winding. If the designed magnetic component structure has poor heat dissipation, it will greatly affect the working life of the magnetic component and may even affect the normal operation of the vehicle power supply.

[0003] In order to improve the efficiency of the vehicle power supply under low voltage and high current output, a full-wave rectifier circuit consisting of a center-tapped transformer is often used, such as Figure 1 At the same time, considering that the secondary copper winding of the center-tapped transformer handles a large current, engineering designers usually place the transformer in a position with good thermal conductivity (with water channels around the magnetic parts) and add a skeleton to the transformer (such as Figure 2 As shown, Figure 2 The structure of the transformer in the related art) is used to facilitate the thermal conductive glue to enter the magnetic part and fully contact the winding and the magnetic core. However, the thermal conductivity of the thermal conductive glue is much smaller than that of the heat source copper sheet winding, the heat dissipation effect of the winding is poor, and the use of the skeleton also increases the volume of the magnetic core. In addition, most of the magnetic cores in the related art adopt the design of front and rear windows, which further aggravates the deterioration of the heat dissipation conditions of the winding.

[0004] Therefore, the current related designs cannot meet the heat dissipation requirements of magnetic components. Summary of the invention

[0005] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a magnetic element and an electrical device, which can solve the problem of poor heat dissipation effect in the related art.

[0006] The utility model discloses a magnetic element, which includes:

[0007] The magnetic core structure includes a middle column and a plurality of side columns, wherein the plurality of side columns are arranged around the circumference of the middle column, and two adjacent side columns cooperate with each other to form a window;

[0008] The winding structure includes a plurality of windings stacked in sequence, wherein the plurality of windings are sleeved on the center column, and at least one winding extends outwardly along the window to form a heat dissipation fin located outside the window.

[0009] The magnetic element uses the winding as a heat conductor and extends the winding to form a window to increase the heat dissipation area, improve the heat dissipation conditions of the winding in the window, and enhance the heat dissipation effect.

[0010] Furthermore, the plurality of windings extend outwardly along the window to form a plurality of heat dissipation fins located outside the window.

[0011] Furthermore, the surface areas of the heat dissipation fins corresponding to the multiple windings are all the same.

[0012] Furthermore, the heat dissipation fin includes a protruding portion and a folded portion, the protruding portion extends outward along the window, and the folded portion is bent inward toward the window.

[0013] Furthermore, the number of the side columns is at least three, and at least three side columns are arranged at equal angles and intervals on the circumference of the central column to cooperate with each other to form a plurality of windows.

[0014] Furthermore, the multiple windows include at least one outlet terminal window and multiple heat dissipation windows, and any winding extends outward along the multiple heat dissipation windows to form heat dissipation fins located outside the heat dissipation windows. The heat dissipation fins include multiple heat dissipation units located outside different heat dissipation windows.

[0015] Furthermore, the shapes of the multiple heat dissipation units are not completely the same.

[0016] Furthermore, the number of side columns is four, and the four side columns are arranged at equal angles on the circumference of the middle column to cooperate with each other to form an output terminal window and three heat dissipation windows. The winding includes a first winding, a second winding, a third winding and a fourth winding stacked in sequence from top to bottom; in one of the heat dissipation windows, the second winding and the third winding extend outward respectively to form heat dissipation units respectively.

[0017] Further, the number of windings is the same as the number of limbs.

[0018] Furthermore, the shapes of the heat dissipation fins corresponding to the multiple windings are all the same.

[0019] Furthermore, the winding includes a plurality of copper sheets arranged in parallel.

[0020] The utility model embodiment also discloses an electrical device, including the magnetic element as described above, and also including heat-conducting glue and a water channel, wherein the heat-conducting glue is filled between the heat dissipation fins and the water channel.

[0021] The magnetic element provided by the utility model has the following beneficial effects, including but not limited to:

[0022] 1) The magnetic element uses the winding as a heat conductor and extends the winding to form a window to increase the heat dissipation area, improve the heat dissipation conditions of the winding in the window, and enhance the heat dissipation effect;

[0023] 2) The core structure of the magnetic element has multi-sided windows. Compared with the windows on the front and back sides, the multi-sided windows have a larger exposed surface area of ​​the winding and better heat dissipation performance under the same volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0025] Figure 1 It is a full-bridge Buck topology diagram using a center-tapped transformer in the related art;

[0026] Figure 2 is a schematic diagram of the structure of a transformer in the related art;

[0027] Figure 3 A schematic structural diagram of a magnetic core structure provided in Example 1 of the utility model;

[0028] Figure 4 A left side view of the magnetic element provided in Example 1 of the utility model;

[0029] Figure 5 A right side view of the magnetic element provided in Example 1 of the utility model;

[0030] Figure 6 A bottom view of the magnetic element provided in Example 1 of the utility model;

[0031] Figure 7 This is a left view of the magnetic element provided in Example 2 of the utility model.

[0032] Icons: 100 - magnetic element; 11 - magnetic core structure; 111 - middle column; 112 - side column; 12 - winding; 121 - heat sink; 1211 - extension part; 1212 - folded part. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] Example 1

[0036] Please refer to Figure 3-Figure 6 The embodiment of the utility model provides a magnetic element 100, which includes a magnetic core structure 11 and a winding structure. The magnetic core structure 11 includes a central column 111 and a plurality of side columns 112, the plurality of side columns 112 are wound around the central column 111, and two adjacent side columns 112 cooperate with each other to form a window. The winding structure includes a plurality of windings 12 stacked in sequence, the plurality of windings 12 are all sleeved on the central column 111, and at least one winding 12 extends outward along the window to form a heat dissipation fin 121 located outside the window.

[0037] It is worth noting that the thermal conductivity of the thermally conductive adhesive used in the related art is 0.85-3W / (m*K), while the thermal conductivity of the copper winding 12 is 401W / (m*K), which is much greater than the thermal conductivity of the thermally conductive adhesive. Therefore, the winding 12 can be both a heat source and an excellent conductor of heat. The magnetic element 100 uses the winding 12 as a thermal conductor, extends the winding 12 into a window, increases the heat dissipation area, improves the heat dissipation conditions of the winding 12 in the window, and improves the heat dissipation effect.

[0038] In this embodiment, the plurality of windings 12 extend outward along the window to form a plurality of heat dissipation fins 121 located outside the window. It is understandable that the extension of each winding 12 forms a heat dissipation fin 121, which can increase the overall heat dissipation surface area, and a larger heat dissipation surface area helps to increase the heat dissipation rate, allowing the system to dissipate heat more effectively. At the same time, the presence of multiple heat dissipation fins 121 can improve the distribution of heat around the magnetic element 100, help avoid the accumulation of heat in a specific area, thereby reducing the risk of hot spots in the system, improving the reliability and stability of the magnetic element 100, and extending the service life of the magnetic element 100.

[0039] In this embodiment, the surface areas of the heat dissipation fins 121 corresponding to the plurality of windings are the same. It can be understood that this structural design can ensure the stability of the heat dissipation performance of the magnetic element 100 and simplify the design and maintenance process of the magnetic element 100.

[0040] like Figure 4-Figure 6 As shown, the heat dissipation fin 121 includes a protruding portion 1211 and a folded portion 1212 . The protruding portion 1211 extends outward along the window, and the folded portion 1212 is bent inward toward the window.

[0041] It is worth noting that the folded portion 1212 is bent inwardly toward the window, which can prevent heat from flowing back to the vicinity of the magnetic element 100, reduce the possibility of heat accumulation, and help maintain a lower operating temperature. In addition, the design of the folded portion 1212 can increase the strength and stability of the heat dissipation fin 121, making it more able to withstand the pressure and vibration of the external environment. At the same time, this structure can save space, making the overall heat dissipation structure more compact, and helping to achieve more effective heat dissipation in a limited space.

[0042] In this embodiment, the number of the side pillars 112 is at least three, and the at least three side pillars 112 are arranged at equal angles and intervals on the circumference of the middle pillar 111 to cooperate with each other to form a plurality of windows.

[0043] Please refer again Figure 3 In one implementation of this embodiment, the number of side columns 112 is four, and the four side columns 112 are arranged at equal angles on the circumference of the middle column 111 to cooperate with each other to form an outlet terminal window and three heat dissipation windows, and any winding extends outward along multiple heat dissipation windows to form a heat dissipation fin located outside the heat dissipation window, and the heat dissipation fin includes multiple heat dissipation units located outside different heat dissipation windows. It can be understood that, under the same volume, compared with the heat dissipation windows on the front and back sides, the exposed surface area of ​​the winding 12 of the heat dissipation window with multiple windows is larger, and its heat dissipation performance is better. It can also be understood that in this embodiment, multiple heat dissipation units are respectively located outside different heat dissipation windows, and their combination is a heat dissipation fin. Any heat dissipation unit can include the above-mentioned extension portion 1211 and the folding portion 1212, and the heat dissipation unit will not conflict with the definition of the extension portion 1211 or the folding portion 1212.

[0044] It is also worth noting that, due to the height limitation of the magnetic core structure 11, multiple windings 12 are used to extend outward along three of the heat dissipation windows, which can avoid mutual interference and reduce insulation problems between the windings 12 or between the windings 12 and the magnetic core. Depending on the specific implementation environment, it can also extend outward toward other multi-faceted heat dissipation windows. This embodiment does not constitute a limitation on the extension direction of the winding 12, but is only an example of its extension direction.

[0045] In this embodiment, the number of windings 12 is the same as the number of side poles 112. It is understandable that the number of windings 12 is equal to the number of side poles 112, which can maintain the symmetry and balance of the structure and help achieve the stability of the magnetic element 100 and the uniformity of heat dissipation performance.

[0046] like Figure 4 As shown, the winding includes a first winding, a second winding, a third winding and a fourth winding stacked in sequence from top to bottom (ie, four windings 12 from top to bottom in the figure); one of the heat dissipation windows (ie Figure 5 The second winding and the third winding extend outwardly to form the heat dissipation unit. Figure 4 Considering the lead-out position of the primary winding, the heat dissipation of the two outermost windings 12 (i.e., the first winding and the fourth winding) is extended to the outside of the magnetic core. Figure 5 In the embodiment, the heat dissipation warps of the two outermost upper and lower windings 12 are removed to meet the insulation requirements, and the heat dissipation warps of the two middle windings 12 are extended to the outside of the magnetic core.

[0047] In this embodiment, the winding includes a plurality of copper sheets arranged in parallel.

[0048] This embodiment also discloses an electrical device, including the magnetic element as described above, and also including thermally conductive glue and a water channel, wherein the thermally conductive glue is filled between the heat dissipation fin and the water channel. The electrical device can be an electrical component such as an inductor and a transformer. It is understandable that the electrical device utilizes the thermally conductive glue to fully contact the heat dissipation fin and the water channel of the winding 12. This design can fully utilize the heat dissipation conditions of the water channel, improve the heat dissipation of the winding structure, and thus meet the heat dissipation requirements of the magnetic element 100.

[0049] Example 2

[0050] Please refer to Figure 7 This embodiment provides a magnetic element, and the shapes of the multiple windings 12 of the magnetic element are the same. The rest of the structure is the same as that of the embodiment 1, and will not be repeated here.

[0051] It is worth noting that the shapes of the heat sinks corresponding to the multiple windings 12 are the same, which can simplify the manufacturing and design process, and there is no need to design heat sinks of different shapes for each winding, thereby reducing the process complexity and manufacturing cost. At the same time, windings with heat sinks of the same shape can be mass-produced, which improves manufacturing efficiency and reduces production costs. In addition, when the shapes of all heat sinks are the same, maintenance and replacement work is simpler, and there is no need to distinguish heat sinks of different shapes, which makes replacement more convenient and quick. The above embodiments are only illustrative of the principles and effects of the utility model, and are not used to limit the utility model. Anyone familiar with this technology can modify or change the above embodiments without violating the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

[0052] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more specific details or by other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0053] References throughout the specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described herein and shown may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0054] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0055] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

[0056] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.

[0057] The above description of the illustrated embodiments of the present invention (including the contents in the abstract of the specification) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and understood by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments of the present invention, and these modifications will be within the spirit and scope of the present invention.

[0058] Systems and methods have been generally described herein as details that are helpful for understanding the present invention. In addition, various specific details have been given to provide an overall understanding of the embodiments of the present invention. However, those skilled in the relevant art will recognize that the embodiments of the present invention can be practiced without one or more specific details, or practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of the embodiments of the present invention.

Claims

1. A magnetic element, characterized in that: include: A magnetic core structure, the magnetic core structure comprising a middle column and a plurality of side columns, the plurality of side columns being arranged around the circumference of the middle column, and two adjacent side columns cooperate with each other to form a window; The winding structure includes a plurality of windings stacked in sequence, wherein the plurality of windings are sleeved on the center column, and at least one winding extends outwardly along the window to form a heat dissipation fin located outside the window.

2. The magnetic element according to claim 1, characterized in that: The plurality of windings all extend outwardly along the window to form a plurality of heat dissipation fins located outside the window.

3. The magnetic element according to claim 2, characterized in that: The surface areas of the heat dissipation fins corresponding to the plurality of windings are all the same.

4. The magnetic element according to any one of claims 1 to 3, characterized in that: The heat dissipation fin comprises a protruding portion and a folded portion, wherein the protruding portion extends outwardly along the window, and the folded portion is bent inwardly toward the window.

5. The magnetic element according to claim 1, characterized in that: The number of the side columns is at least three, and at least three of the side columns are arranged at equal angles and intervals on the circumference of the middle column to cooperate with each other to form a plurality of the windows.

6. The magnetic element according to claim 5, characterized in that: The multiple windows include at least one outlet terminal window and multiple heat dissipation windows. Any winding extends outward along the multiple heat dissipation windows to form heat dissipation fins located outside the heat dissipation windows. The heat dissipation fins include multiple heat dissipation units located outside different heat dissipation windows.

7. The magnetic element according to claim 6, characterized in that: The shapes of the plurality of heat dissipation units are not completely the same.

8. The magnetic element according to claim 7, characterized in that: There are four side columns, which are arranged at equal angles on the circumference of the middle column to cooperate with each other to form an outlet terminal window and three heat dissipation windows. The winding includes a first winding, a second winding, a third winding and a fourth winding stacked in sequence from top to bottom; in one of the heat dissipation windows, the second winding and the third winding extend outward respectively to form the heat dissipation unit respectively.

9. The magnetic element according to any one of claims 5 to 7, characterized in that: The number of the windings is the same as the number of the side columns.

10. The magnetic element according to claim 2, characterized in that: The shapes of the heat dissipation fins corresponding to the plurality of windings are all the same.

11. The magnetic element according to claim 1, characterized in that: The winding includes a plurality of copper sheets arranged in parallel.

12. An electrical device, comprising the magnetic element according to any one of claims 1 to 11, characterized in that: It also includes heat-conducting glue and a water channel, and the heat-conducting glue is filled between the heat dissipation fins and the water channel.

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