Magnetic device with integrated structure and voltage conversion module

Abstract

The utility model discloses a magnetic device with an integrated structure and a voltage conversion module, and the magnetic device with the integrated structure comprises a magnetic core which comprises a substrate and at least two magnetic columns disposed on one side of the substrate; the plurality of primary windings are in one-to-one correspondence with the at least two magnetic columns, and the plurality of primary windings are connected in series and are respectively arranged at one ends, close to the substrate, of the corresponding magnetic columns; and the plurality of secondary windings are in one-to-one correspondence with the at least two magnetic columns, and the plurality of secondary windings are connected in parallel and are respectively arranged at one ends, far away from the substrate, of the corresponding magnetic columns. The magnetic device is of an integrated structure, all the primary windings and the secondary windings are located on a common magnetic core instead of two independent magnetic cores, so that copper, magnetic cores, insulating materials and the like can be reduced, the cost of raw materials is reduced, and compared with the scheme that two transformers are connected in parallel, the size of the magnetic device can be greatly reduced, and the size of the magnetic device is reduced. And all-in-one integration and miniaturization of the transformer are realized.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic devices, and in particular to an integrated magnetic device and a voltage conversion module. Background Art

[0002] With the continuous expansion of the new energy vehicle market, the market demand for DC / DC converters, as an important component of electric vehicles, continues to rise. The on-board power supply (OBC, DC / DC) of new energy vehicles is facing an integrated development trend. Therefore, how to ensure the improvement of the power density of the transformer and reduce the cost of the product while the product application power continues to increase is the key to the design of DC / DC transformer products.

[0003] At present, high-current (when the power reaches 11KW) DC / DC transformers are usually implemented by connecting two transformers in parallel, which will cause the overall volume and cost to increase sharply. Utility Model Content

[0004] In response to the above technical problems, the present application provides an integrated magnetic device and a voltage conversion module, which can improve the problem that the existing transformer will cause a sharp increase in volume and cost when implementing large currents.

[0005] In order to solve the above technical problems, in a first aspect, an embodiment of the present application provides a magnetic device with an integrated structure, comprising:

[0006] A magnetic core, comprising a substrate, and at least two magnetic columns arranged on one side of the substrate;

[0007] A plurality of primary windings, corresponding one to one with the at least two magnetic columns, the plurality of primary windings are connected in series and are respectively arranged on the corresponding magnetic columns;

[0008] A plurality of secondary windings correspond to the at least two magnetic columns one by one, and the plurality of secondary windings are connected in parallel and are respectively arranged on the corresponding magnetic columns.

[0009] Optionally, the winding direction of each primary winding is the same.

[0010] Optionally, the multiple primary windings are series-connected coils.

[0011] Optionally, the multiple secondary windings are parallel copper foil coils.

[0012] Optionally, each of the copper foil coils includes an input contact and an output contact, all of the input contacts are electrically connected to each other, and all of the output contacts are electrically connected to each other.

[0013] Optionally, the substrate includes a supporting portion, and a limiting portion bent and extended to one side from an edge of the supporting portion;

[0014] The magnetic column and the limiting portion are located on the same side of the supporting portion.

[0015] In a second aspect, an embodiment of the present application provides a voltage conversion module, comprising a magnetic device of an integrated structure as described in the above embodiments.

[0016] As described above, the magnetic device of the present application is an integrated structure, the magnetic core includes at least two magnetic columns, and each magnetic column is respectively provided with a primary winding and a secondary winding, and all primary windings are connected in series, and all secondary windings are connected in parallel, so as to achieve a large current. Since all primary windings and secondary windings are located on a common magnetic core, rather than two independent magnetics, copper, magnetic cores, and insulating materials can be significantly reduced, and the cost of raw materials can be reduced. Compared with the solution of connecting two transformers in parallel, the volume of the magnetic device can be greatly reduced, and the all-in-one integration and miniaturization of the transformer can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a surface-mounted magnetic device provided in an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of a three-dimensional structure of a magnetic device with an integrated structure provided in an embodiment of the present application;

[0020] Figure 3 yes Figure 2 Schematic diagram of the explosion structure;

[0021] Figure 4 This is a schematic diagram of a magnetic field simulation inside a magnetic core of a magnetic device with an integrated structure provided in an embodiment of the present application;

[0022] Figure 5 It is a front view of a magnetic device with an integrated structure provided in an embodiment of the present application;

[0023] Figure 6 It is a schematic diagram of the circuit structure of an integrated magnetic device provided in an embodiment of the present application.

[0024] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The above-mentioned drawings have shown clear embodiments of this application, which will be described in more detail later. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0026] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this document, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless otherwise indicated in the context.

[0027] It should be understood that the orientations or positional relationships indicated by terms such as "top", "bottom", "up", "down", "vertical", and "horizontal" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device referred to 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 application.

[0028] See also Figure 1 , Figure 1 This is a schematic diagram of a transformer assembly of the related art, which includes a transformer 100a and a transformer 100b. The two transformers are connected in parallel to meet the demand for high current, but this will cause the overall volume and cost of the transformer assembly to increase sharply. Based on this, the present application provides an integrated magnetic device and a voltage conversion module.

[0029] See also Figure 2 and Figure 3 , Figure 2 is a schematic diagram of a three-dimensional structure of an integrated magnetic device provided in an embodiment of the present application, Figure 3 yes Figure 2 Schematic diagram of an exploded structure, the magnetic device may include a magnetic core 10, a plurality of primary windings 20 and a plurality of secondary windings 30.

[0030] The magnetic core 10 includes a substrate 11 and at least two magnetic columns 12 . All the magnetic columns 12 are disposed on one side of the substrate 11 .

[0031] There are multiple primary windings 20, which correspond to the magnetic columns 12 one by one. All primary windings 20 are connected in series and are respectively arranged on the corresponding magnetic columns 12, for example, they can be arranged at one end of the magnetic column 12 close to the substrate 11. Preferably, the winding direction of each primary winding 20 is the same. For example, the current flowing into each primary winding 20 is simultaneously clockwise or simultaneously counterclockwise, so that the magnetic flux generated by each primary winding 20 can offset each other, such as Figure 4 As shown, it can achieve the effect of current balancing and make the loss of the magnetic core 10 lower and have a lower temperature rise.

[0032] There are multiple secondary windings 30 , which correspond to the magnetic columns 12 one by one. All secondary windings 30 are connected in parallel and are respectively arranged on corresponding magnetic columns 12 , for example, they can be arranged at one end of the magnetic column 12 away from the substrate 11 .

[0033] It is understandable that the primary winding 20 and the secondary winding 30 can be sleeved on the corresponding magnetic column 12, and the primary winding 20 is located between the substrate 11 and the corresponding secondary winding 30, or the secondary winding 30 is located between the substrate 11 and the corresponding primary winding 20. As an example, please continue to refer to 3, the substrate 11 may include a support portion 111, and a limit portion 112 bent and extended from the edge of the support portion 111 to one side, and the magnetic column 12 and the limit portion 112 are located on the same side of the support portion 111. The limit portion 112 can be two side plates, and are located on opposite sides of the substrate 11. The limit portion 112 can also be a plurality of side plates, which are evenly distributed or unevenly distributed along the circumference of the substrate 11.

[0034] It should be noted that Figure 2 and 3 The example of setting two of the central magnetic column 12, the primary winding 20 and the secondary winding 30 is taken as an example, and the same is applicable when three or more are set, and other embodiments of the present application will not be described in detail.

[0035] The magnetic device of this embodiment is an integrated structure, the magnetic core 10 includes at least two magnetic columns 12, and each magnetic column 12 is respectively provided with a primary winding 20 and a secondary winding 30, and all primary windings 20 are connected in series, and all secondary windings 30 are connected in parallel, so as to achieve a large current. Since all primary windings 20 and secondary windings 30 are located on a common magnetic core 10, rather than two independent magnetics, copper, magnetic core and insulating materials can be significantly reduced, and the cost of raw materials can be reduced. Compared with the solution of connecting two transformers in parallel, the volume of the magnetic device can be greatly reduced, and the all-in-one integration and miniaturization of the transformer are realized.

[0036] It should be noted that, in the embodiment of the present application, the primary winding 20 may be a conventional cylindrical winding structure, but the manufacturing process of winding around the magnetic column 12 is relatively complicated. Therefore, in one embodiment of the present application, all primary windings 20 are preferably coils connected in series in sequence, such as Figure 3 As shown, the solution of serially connecting the coils can reduce the height of the product and further reduce the volume of the product by about 30%. In the manufacturing process, only the serial coils and the magnetic core 10 need to be assembled, which simplifies the product manufacturing process and reduces the manufacturing cost.

[0037] Similarly, the secondary winding 30 may also be preferably a parallel copper foil coil, such as Figure 3 As shown, the volume of the magnetic device can also be reduced, and the manufacturing process can be simplified to reduce the manufacturing cost.

[0038] In one embodiment, see Figure 3 , Figure 5 and Figure 6 , Figure 5 is a front view of a magnetic device with an integrated structure provided in an embodiment of the present application, Figure 6 : This is a schematic diagram of the circuit structure of an integrated magnetic device provided by an embodiment of the present application. Two primary windings 20 are connected in series (i.e., a series coil), and after the series connection, they include an input terminal 21 and an output terminal 22, which can be connected to a power supply. Both secondary windings 30 are copper foil coils, each of which includes an input contact 31 and an output contact 32, all input contacts 31 are electrically connected to each other, all output contacts 32 are electrically connected to each other, and a load can be connected between the input contact 31 and the output contact 32.

[0039] The present application also provides a voltage conversion module, which may include the magnetic device of the integrated structure described in the above embodiments. Exemplarily, the voltage conversion module can be applied to charging devices, such as chargers and charging piles, and can also be applied to electronic equipment, automobiles and other fields.

[0040] For other working principles and processes of the voltage conversion module of this embodiment, please refer to the description of the integrated structure magnetic device in the aforementioned embodiment of the present invention, which will not be repeated here.

[0041] The above is a detailed introduction to an integrated magnetic device and a voltage conversion module provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. It should be noted that in the present application, the descriptions of various embodiments have different emphases. For parts that are not described or recorded in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0042] The above are only preferred embodiments of the present application, and the patent scope of the present application is not limited thereto. The various technical features of the technical solution of the present application can be arbitrarily combined. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of this application, or directly or indirectly used in other related technical fields, as long as there is no contradiction in the combination of these technical features, are equally included in the patent protection scope of the present application.

Claims

1. A magnetic device with an integrated structure, characterized in that: include: A magnetic core, comprising a substrate, and at least two magnetic columns arranged on one side of the substrate; A plurality of primary windings, corresponding one to one with the at least two magnetic columns, the plurality of primary windings are connected in series and are respectively arranged on the corresponding magnetic columns; A plurality of secondary windings correspond to the at least two magnetic columns one by one, and the plurality of secondary windings are connected in parallel and are respectively arranged on the corresponding magnetic columns.

2. The integrated magnetic device according to claim 1, characterized in that: The winding direction of each primary winding is the same.

3. The integrated magnetic device according to claim 1, characterized in that: The plurality of primary windings are serially connected coils.

4. The integrated magnetic device according to claim 1, characterized in that: The multiple secondary windings are parallel copper foil coils.

5. The integrated magnetic device according to claim 4, characterized in that: Each of the copper foil coils includes an input contact and an output contact, all of the input contacts are electrically connected to each other, and all of the output contacts are electrically connected to each other.

6. The integrated magnetic device according to claim 1, characterized in that: The substrate comprises a supporting portion, and a limiting portion extending from an edge of the supporting portion and bent to one side; The magnetic column and the limiting portion are located on the same side of the supporting portion.

7. A voltage conversion module, characterized in that: A magnetic device comprising the integrated structure as claimed in any one of claims 1 to 6.

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