CN214505209U - Magnetic integration device, DC-DC converter and switching power supply - Google Patents
Magnetic integration device, DC-DC converter and switching power supply Download PDFInfo
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- CN214505209U CN214505209U CN202120476885.8U CN202120476885U CN214505209U CN 214505209 U CN214505209 U CN 214505209U CN 202120476885 U CN202120476885 U CN 202120476885U CN 214505209 U CN214505209 U CN 214505209U
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Abstract
The utility model discloses a magnetism integrated device, direct current-direct current converter and switching power supply, wherein, this magnetism integrated device includes winding structure and closed loop magnetic core structure, and winding structure includes the first winding that has at least one coil and has the second winding of at least one coil; the first winding and the second winding are respectively wound on the surface of the magnetic core structure, and the first winding and the second winding are oppositely arranged or arranged in a staggered manner to form at least one inductive magnetic circuit and at least one transformer magnetic circuit. The utility model discloses a magnetism integrated device can solve the whole bulky technical problem that power density is low of current switching power supply.
Description
Technical Field
The utility model belongs to the technical field of the magnetism is integrated, concretely relates to magnetism integrated device, direct current-direct current converter and switching power supply.
Background
As a power conversion device, a switching power supply plays an important role in modern power supplies, and existing switching power supplies are mainly classified into two types: the dc switching power supply is most widely used because it can convert the coarse power output by power transmission into a dc voltage (fine power) to meet the requirements of various electronic devices.
The core component of the DC switching power supply is a DC/DC converter (i.e., a DC-DC converter), and a complete DC/DC converter usually includes magnetic components such as an inductor and a transformer, however, at present, most inductors and transformers in the DC/DC converter are usually independent components and need to be respectively welded in the switching power supply, so that not only the overall size of the switching power supply is too large, but also the power density of the switching power supply is reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above disadvantages of the prior art, an object of the present invention is to provide a magnetic integration device, which is aimed at solving the technical problems of large overall size and low power density of the existing switching power supply.
The utility model discloses a reach its purpose, the technical scheme who adopts as follows:
a magnetic integrated device comprising a winding structure and a closed-loop magnetic core structure, the winding structure comprising a first winding having at least one coil and a second winding having at least one coil; the first winding and the second winding are respectively wound on the surface of the magnetic core structure, and the first winding and the second winding are oppositely arranged or staggered to form at least one inductive magnetic circuit and at least one transformer magnetic circuit.
Further, the magnetic core structure comprises a first magnetic core and a second magnetic core which are oppositely arranged, and a third magnetic core and a fourth magnetic core which are oppositely arranged; wherein the content of the first and second substances,
the first end of the first magnetic core is connected with the first end of the third magnetic core, and the second end of the first magnetic core is connected with the first end of the fourth magnetic core;
the first end of the second magnetic core is connected with the second end of the third magnetic core, and the second end of the second magnetic core is connected with the second end of the fourth magnetic core;
the first winding is wound on the surface of the first magnetic core, and the second winding is wound on the surface of the second magnetic core.
Further, the first magnetic core includes a first sub-magnetic core and a second sub-magnetic core, the second magnetic core includes a third sub-magnetic core and a fourth sub-magnetic core, the first winding includes a first coil and a second coil, and the second winding includes a third coil and a fourth coil;
the first end of the first secondary magnetic core is connected with the first end of the third magnetic core, the second end of the first secondary magnetic core is connected with the first end of the second secondary magnetic core, and the second end of the second secondary magnetic core is connected with the first end of the fourth magnetic core;
the first end of the third auxiliary magnetic core is connected with the second end of the third magnetic core, the second end of the third auxiliary magnetic core is connected with the first end of the fourth auxiliary magnetic core, and the second end of the fourth auxiliary magnetic core is connected with the second end of the fourth magnetic core;
the first coil is wound on the first secondary magnetic core, the second coil is wound on the second secondary magnetic core, and a gap exists between the first coil and the second coil;
the third coil is wound on the third auxiliary magnetic core, the fourth coil is wound on the fourth auxiliary magnetic core, a gap exists between the third coil and the fourth coil, the third coil is opposite to the first coil, and the fourth coil is opposite to the second coil.
Furthermore, a first glue layer is arranged between the first auxiliary magnetic core and the second auxiliary magnetic core, and the first auxiliary magnetic core and the second auxiliary magnetic core are attached through the first glue layer; and/or the presence of a gas in the atmosphere,
and a second glue layer is arranged between the third auxiliary magnetic core and the fourth auxiliary magnetic core, and the third auxiliary magnetic core is attached to the fourth auxiliary magnetic core through the second glue layer.
Further, the first magnetic core further comprises a fifth pair of magnetic cores, the second magnetic core further comprises a sixth pair of magnetic cores, the first winding further comprises a fifth coil, and the second winding further comprises a sixth coil;
the first end of the fifth auxiliary magnetic core is connected with the second end of the first auxiliary magnetic core, and the second end of the fifth auxiliary magnetic core is connected with the first end of the second auxiliary magnetic core;
the first end of the sixth auxiliary magnetic core is connected with the second end of the third auxiliary magnetic core, and the second end of the sixth auxiliary magnetic core is connected with the first end of the fourth auxiliary magnetic core;
the fifth coil is wound on the fifth auxiliary magnetic core, and a gap is formed between the fifth coil and the first coil and between the fifth coil and the second coil;
the sixth coil is wound on the sixth auxiliary magnetic core, intervals exist among the sixth coil, the third coil and the fourth coil, and the sixth coil and the fifth coil are arranged oppositely.
Furthermore, third glue layers are arranged between the fifth auxiliary magnetic core and the first auxiliary magnetic core and between the fifth auxiliary magnetic core and the second auxiliary magnetic core, and the fifth auxiliary magnetic core is respectively attached to the first auxiliary magnetic core and the second auxiliary magnetic core through the corresponding third glue layers; and/or the presence of a gas in the atmosphere,
and a fourth glue layer is arranged between the sixth auxiliary magnetic core and the third auxiliary magnetic core and between the fourth auxiliary magnetic core, and the fifth auxiliary magnetic core is respectively attached to the third auxiliary magnetic core and the fourth auxiliary magnetic core through the corresponding fourth glue layer.
Further, the magnetic core structure is ring-shaped, or the magnetic core structure is a UU-shaped combined magnetic core or UI-shaped combined magnetic core in a shape like a Chinese character kou.
Further, the first magnetic core is symmetrically disposed with the second magnetic core with respect to a middle portion of the third magnetic core, and the third magnetic core is symmetrically disposed with the fourth magnetic core with respect to a middle portion of the first magnetic core; and/or the first magnetic core and/or the second magnetic core are columnar; and/or the third magnetic core and/or the fourth magnetic core are flat.
Correspondingly, the utility model discloses still put forward a direct current-direct current converter, direct current-direct current converter includes aforementioned magnetism integrated device.
Correspondingly, the utility model discloses still provide a switching power supply, switching power supply includes aforementioned direct current-direct current converter.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a magnetism integrated device, magnetic core structure through the design closed loop, the mode that the first winding and the second winding that will have at least one coil simultaneously set up or misplace the setting with relative respectively the coiling is structural at the magnetic core, make originally independent transformer and originally independent at least one inductance accessible sharing magnetic core and winding the mode integrated in an organic whole, thereby can effectively reduce DC-DC converter's whole volume and improve DC-DC converter's power density, and then can effectively reduce switching power supply's whole volume and improve switching power supply's power density.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a magnetic core structure according to an embodiment of the present invention;
fig. 2 is a schematic view of an overall structure of a magnetic integration device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the magnetic circuit distribution of the magnetic integration device according to an embodiment of the present invention.
Description of reference numerals:
1-a first magnetic core, 11-a first sub-magnetic core, 12-a second sub-magnetic core, 15-a fifth sub-magnetic core; 2-second magnetic core, 23-third magnetic core, 24-fourth magnetic core, 26-sixth magnetic core; 3-a third magnetic core, 4-a fourth magnetic core, 5-a first winding, 51-a first coil, 52-a second coil, 55-a fifth coil; 6-second winding, 63-third coil, 64-fourth coil, 66-sixth coil; 7-transformer magnetic circuit, 81-first inductor magnetic circuit, 82-second inductor magnetic circuit, 83-third inductor magnetic circuit.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 3, an embodiment of the present invention provides a magnetic integrated device including a winding structure and a closed-loop magnetic core structure, the winding structure including a first winding 5 having at least one coil and a second winding 6 having at least one coil; the first winding 5 and the second winding 6 are respectively wound on the surface of the magnetic core structure, and the first winding 5 and the second winding 6 are oppositely arranged or arranged in a staggered manner to form at least one inductive magnetic circuit and at least one transformer magnetic circuit.
In this embodiment, in a specific implementation, the magnetic core structure may be designed to be circular (e.g. circular or elliptical), and the magnetic core structure may also be designed to be "square", for example, the magnetic core structure is designed to be a UU-shaped combined magnetic core (i.e. formed by butting two U-shaped magnetic cores) or a UI-shaped combined magnetic core (i.e. formed by butting one U-shaped magnetic core and one I-shaped magnetic core), as long as the purpose of sharing the magnetic core and the winding can be achieved, which is not limited in this embodiment.
The magnetic integration device provided by the embodiment is characterized in that a closed-loop magnetic core structure is designed, and the first winding 5 and the second winding 6 with at least one coil are respectively wound on the magnetic core structure in a mode of relative arrangement or staggered arrangement, so that an originally independent transformer and an originally independent at least one inductor can be integrated into a whole in a mode of sharing the magnetic core and the windings, the whole volume of the direct current-direct current converter can be effectively reduced, the power density of the direct current-direct current converter can be improved, and the whole volume of the switching power supply can be effectively reduced and the power density of the switching power supply can be improved. Preferably, the first winding 5 and the second winding 6 are arranged opposite to each other, so that the overall heat dissipation effect of the magnetic integrated device is improved compared with a staggered arrangement mode.
Further, referring to fig. 1-3, in one exemplary embodiment, the core structure is designed in a "bell" shape. Specifically, the magnetic core structure includes a first magnetic core 1 and a second magnetic core 2 which are oppositely arranged, and a third magnetic core 3 and a fourth magnetic core 4 which are oppositely arranged; wherein, the first end of the first magnetic core 1 is connected with the first end of the third magnetic core 3, and the second end of the first magnetic core 1 is connected with the first end of the fourth magnetic core 4; the first end of the second magnetic core 2 is connected with the second end of the third magnetic core 3, and the second end of the second magnetic core 2 is connected with the second end of the fourth magnetic core 4; the first winding 5 is wound on the surface of the first magnetic core 1, and the second winding 6 is wound on the surface of the second magnetic core 2.
In the present embodiment, based on the above structural design, by designing the closed-loop magnetic core structure, and simultaneously winding the first winding 5 with at least one coil on the first magnetic core 1 of the magnetic core structure, winding the second winding 6 with at least one coil on the second magnetic core 2 of the magnetic core structure, so that the first winding 5, the second winding 6 and the entire core structure together form a transformer, the first core 1 wound with the first winding 5 and the second core 2 wound with the second winding 6 together form at least one inductor, in this way, the originally independent transformer and the originally independent at least one inductor can be integrated into a whole in a mode of sharing the magnetic core and the winding, thereby effectively reducing the whole volume of the DC-DC converter and improving the power density of the DC-DC converter, therefore, the overall size of the switching power supply can be effectively reduced, and the power density of the switching power supply can be improved.
Further, referring to fig. 1 to 3, in an exemplary embodiment, the first magnetic core 1 includes a first sub-magnetic core 11 and a second sub-magnetic core 12, the second magnetic core 2 includes a third sub-magnetic core 23 and a fourth sub-magnetic core 24, the first winding 5 includes a first coil 51 and a second coil 52, and the second winding 6 includes a third coil 63 and a fourth coil 64; the first end of the first sub-magnetic core 11 is connected with the first end of the third magnetic core 3, the second end of the first sub-magnetic core 11 is connected with the first end of the second sub-magnetic core 12, and the second end of the second sub-magnetic core 12 is connected with the first end of the fourth magnetic core; the first end of the third auxiliary magnetic core 23 is connected with the second end of the third magnetic core 3, the second end of the third auxiliary magnetic core 23 is connected with the first end of the fourth auxiliary magnetic core 24, and the second end of the fourth auxiliary magnetic core 24 is connected with the second end of the fourth magnetic core; a first coil 51 wound around the first sub-core 11, a second coil 52 wound around the second sub-core 12, and a space between the first coil 51 and the second coil 52; the third coil 63 is wound around the third sub-core 23, the fourth coil 64 is wound around the fourth sub-core 24, a space is present between the third coil 63 and the fourth coil 64, the third coil 63 is disposed opposite to the first coil 51, and the fourth coil 64 is disposed opposite to the second coil 52.
In the present embodiment, based on the above structural design, the integration of two inductors and a transformer can be realized, specifically, the whole first winding 5, the whole second winding 6 and the whole magnetic core structure can jointly form a transformer and form a closed transformer magnetic circuit 7, the third magnetic core 3, the first sub-magnetic core 11 wound with the first coil 51 and the third sub-magnetic core 23 wound with the third coil 63 can jointly form a first inductor and form a closed first inductor magnetic circuit 81, and the fourth magnetic core 4, the second sub-magnetic core 12 wound with the second coil 52 and the fourth sub-magnetic core 24 wound with the fourth coil 64 can jointly form a second inductor and form a closed second inductor magnetic circuit 82, so that the originally independent transformer and the originally independent inductors can be integrated into a whole by sharing the magnetic cores and the windings, thereby effectively reducing the whole volume of the dc-dc converter and improving the power density of the dc-dc converter Therefore, the whole volume of the switching power supply can be effectively reduced, and the power density of the switching power supply can be improved.
Further, referring to fig. 1 and 2, in an exemplary embodiment, a first glue layer (not shown) is disposed between the first sub-magnetic core 11 and the second sub-magnetic core 12, and the first sub-magnetic core 11 and the second sub-magnetic core 12 are attached to each other through the first glue layer. In specific implementation, the first sub-magnetic core 11 and the second sub-magnetic core 12 may be bonded into a whole by anaerobic adhesive, epoxy adhesive, or other types of glue, where the thickness of the first glue layer is the air gap between the first sub-magnetic core 11 and the second sub-magnetic core 12, and the magnitude of the inductance can be adjusted by adjusting the magnitude of the air gap, and in addition, preferably, the first glue layer is located in the interval between the first coil 51 and the second coil 52, so that the first coil 51 and the second coil 52 can be arranged to avoid the air gap, thereby reducing the loss of the whole magnetic integrated device.
In this embodiment, based on the above structural design, the first sub-magnetic core 11 and the second sub-magnetic core 12 are connected by using the first glue layer, so that the magnetic permeability between the first sub-magnetic core 11 and the second sub-magnetic core 12 can be ensured, and the improvement of the overall heat dissipation performance of the magnetic integrated device is facilitated.
Further, referring to fig. 1 and 2, in an exemplary embodiment, a second glue layer (not shown) is disposed between the third sub-core 23 and the fourth sub-core 24, and the third sub-core 23 and the fourth sub-core 24 are attached to each other through the second glue layer. In specific implementation, the third sub-magnetic core 23 and the fourth sub-magnetic core 24 can be bonded into a whole by anaerobic adhesive, epoxy adhesive and other types of glue, wherein the thickness of the second glue layer is the air gap between the third sub-magnetic core 23 and the fourth sub-magnetic core 24, the inductance can be adjusted by adjusting the size of the air gap, and in addition, preferably, the second glue layer is located in the interval between the third coil 63 and the fourth coil 64, so that the third coil 63 and the fourth coil 64 can avoid the air gap arrangement, thereby being beneficial to further reducing the loss of the whole magnetic integration device.
In this embodiment, based on the above structural design, the third sub-core 23 and the fourth sub-core 24 are connected by using the second glue layer, so that the magnetic permeability between the third sub-core 23 and the fourth sub-core 24 can be ensured, and the overall heat dissipation performance of the magnetic integrated device can be further improved.
Further, referring to fig. 1-3, in another exemplary embodiment, first magnetic core 1 further includes a fifth sub-magnetic core 15, second magnetic core 2 further includes a sixth sub-magnetic core 26, first winding 5 further includes a fifth coil 55, and second winding 6 further includes a sixth coil 66; a first end of the fifth sub-magnetic core 15 is connected with a second end of the first sub-magnetic core 11, and a second end of the fifth sub-magnetic core 15 is connected with a first end of the second sub-magnetic core 12; a first end of the sixth sub-core 26 is connected to a second end of the third sub-core 23, and a second end of the sixth sub-core 26 is connected to a first end of the fourth sub-core 24; the fifth coil 55 is wound around the fifth sub-core 15, and a gap is formed between the fifth coil 55 and each of the first coil 51 and the second coil 52; the sixth coil 66 is wound around the sixth sub-core 26, and the sixth coil 66 is spaced apart from the third coil 63 and the fourth coil 64, and the sixth coil 66 is disposed opposite to the fifth coil 55. At this time, the U-shaped core around which the first coil 51 and the second coil 52 are wound and the U-shaped core around which the second coil 52 and the fourth coil 64 are wound may be used together as the primary side of the transformer, and the fifth sub-core 15 around which the fifth coil 55 is wound and the sixth sub-core 26 around which the sixth coil 66 is wound may be used together as the secondary side of the transformer.
In the present embodiment, considering that in some bi-directional dc-dc converters, the resonant cavity generally contains three inductors, the present embodiment can realize the integration of three inductors with a transformer by implementing the above-mentioned structural design, specifically, the whole of the first winding 5, the whole of the second winding 6 and the whole of the magnetic core structure can jointly form a transformer and form a closed transformer magnetic circuit 7, the third magnetic core 3, the first sub-magnetic core 11 wound with the first coil 51 and the third sub-magnetic core 23 wound with the third coil 63 can jointly form a first inductor and form a closed first inductor magnetic circuit 81, the fourth magnetic core 4, the second sub-magnetic core 12 wound with the second coil 52 and the fourth sub-magnetic core 24 wound with the fourth coil 64 can jointly form a second inductor and form a closed second inductor magnetic circuit 82, and the fifth sub-magnetic core 15 wound with the fifth coil 55 and the sixth sub-magnetic core 26 wound with the sixth coil 66 can jointly form a third inductor and form a closed second inductor magnetic circuit 82 The third inductor magnetic circuit 83 is closed, so that an originally independent transformer and three originally independent inductors can be integrated into a whole in a mode of sharing the magnetic core and the winding, the overall size of the dc-dc converter can be effectively reduced, the power density of the dc-dc converter can be improved, and the overall size of the switching power supply can be effectively reduced, and the power density of the switching power supply can be improved. In addition, in consideration of the lower magnetic densities and the poor heat dissipation of the fifth sub-core 15 and the sixth sub-core 26, the fifth sub-core 15 and the sixth sub-core 26 are placed in the middle of the present embodiment, which is beneficial to reducing the temperature rise of the whole first core 1 and the whole second core 2, thereby being beneficial to relieving the heat generation degree of the whole magnetic integrated device.
Further, referring to fig. 1 and 2, in another exemplary embodiment, a third glue layer (not shown) is disposed between the fifth sub-core 15 and each of the first and second sub-cores 11 and 12, and the fifth sub-core 15 is attached to each of the first and second sub-cores 11 and 12 through the corresponding third glue layer. In specific implementation, two ends of the fifth secondary magnetic core 15 may be bonded to the first secondary magnetic core 11 and the second secondary magnetic core 12 respectively by anaerobic adhesive, epoxy adhesive, or other types of glue, where the thickness of the third glue layer is an air gap between the first secondary magnetic core 11 and the fifth secondary magnetic core 15 (or an air gap between the second secondary magnetic core 12 and the fifth secondary magnetic core 15), and the magnitude of the inductance may be adjusted by adjusting the size of the air gap, and preferably, one of the third glue layers is located in the interval between the first coil 51 and the fifth coil 55, and the other third glue layer is located in the interval between the second coil 52 and the fifth coil 55, so that the first coil 51, the second coil 52, and the fifth coil 55 may avoid the air gap, and thus, the loss of the whole magnetic integration apparatus may be further reduced.
In this embodiment, based on the above structural design, the fifth sub-core 15 is connected to the first sub-core 11 and the second sub-core 12 through the corresponding third glue layer, so as to ensure the magnetic permeability between the first sub-core 11 and the fifth sub-core 15 and the magnetic permeability between the second sub-core 12 and the fifth sub-core 15, and further improve the overall heat dissipation performance of the magnetic integrated device.
Further, referring to fig. 1 and 2, in an exemplary embodiment, a fourth glue layer (not shown) is disposed between the sixth sub-magnetic core 26 and the third and fourth sub-magnetic cores 23 and 24, and the fifth sub-magnetic core 15 is attached to the third and fourth sub-magnetic cores 23 and 24 through the corresponding fourth glue layer. In specific implementation, two ends of the sixth sub-magnetic core 26 may be bonded to the third sub-magnetic core 23 and the fourth sub-magnetic core 24 respectively by anaerobic adhesive, epoxy adhesive, or the like, wherein the thickness of the fourth glue layer is an air gap between the third sub-magnetic core 23 and the sixth sub-magnetic core 26 (or an air gap between the fourth sub-magnetic core 24 and the sixth sub-magnetic core 26), and the magnitude of the inductance may be adjusted by adjusting the magnitude of the air gap, and furthermore, preferably, one of the fourth glue layers is located in an interval between the third coil 63 and the sixth coil 66, and the other fourth glue layer is located in an interval between the fourth coil 64 and the sixth coil 66, so that the third coil 63, the fourth coil 64, and the sixth coil 66 may be disposed avoiding the air gap, thereby further reducing the loss of the entire magnetic integrated device.
In this embodiment, based on the above structural design, the sixth sub-core 26 is connected to the third sub-core 23 and the fourth sub-core 24 by using the corresponding fourth glue layer, so that not only the magnetic permeability between the third sub-core 23 and the sixth sub-core 26 and the magnetic permeability between the fourth sub-core 24 and the sixth sub-core 26 can be ensured, but also the overall heat dissipation performance of the magnetic integrated device can be further improved.
Further, referring to fig. 1 and 2, in an exemplary embodiment, the first core 1 is disposed symmetrically to the second core 2 with respect to a middle portion of the third core 3, and the third core 3 is disposed symmetrically to the fourth core 4 with respect to the middle portion of the first core 1.
In this embodiment, based on the above structural design, the magnetic core structure is designed to be a symmetrical structure, so that not only the overall structure of the magnetic integrated device is more compact and aesthetic, but also the heat generated during the operation of the magnetic integrated device can be more uniformly transferred to the third magnetic core 3 and the fourth magnetic core 4 on both sides for heat dissipation, thereby being beneficial to further improving the overall heat dissipation performance of the magnetic integrated device.
Further, referring to fig. 1, in an exemplary embodiment, the first magnetic core 1 and/or the second magnetic core 2 have a cylindrical shape. The first magnetic core 1 and the second magnetic core 2 are both cylindrical, but in other embodiments, the first magnetic core 1 and the second magnetic core 2 may also have a cylindrical structure such as a rectangular parallelepiped, which is not limited in this embodiment.
Further, referring to fig. 1 and 2, in an exemplary embodiment, third core 3 and/or fourth core 4 are flat. Illustratively, the third magnetic core 3 and the fourth magnetic core 4 each have a flat plate structure.
In the present embodiment, considering that the magnetic flux density of the integrated transformer will become large and the heat generation will become serious, in order to solve the problem, the conventional method generally selects to increase the number of turns of the coil to reduce the magnetic flux density of the transformer, however, this method cannot make the heat dissipation performance and the power density of the transformer compatible at the same time, based on this, the present embodiment reduces the thickness of the third magnetic core 3 and/or the fourth magnetic core 4 by designing the third magnetic core 3 and/or the fourth magnetic core 4 in a flat shape, and increases the surface area of the other side surface of the third magnetic core 3 and/or the fourth magnetic core 4 away from the winding structure, so as to not only reduce the thermal resistance of the whole magnetic core structure, but also increase the heat dissipation area of the third magnetic core 3 and/or the fourth magnetic core 4, thereby further effectively improving the overall heat dissipation performance of the magnetic integrated device, the integrated transformer can not only ensure higher power density, but also have good heat dissipation performance, so that the heat dissipation performance and the power density of the integrated transformer can be simultaneously considered.
Correspondingly, the embodiment of the present invention further provides a dc-dc converter, which includes the magnetic integration apparatus in any of the above embodiments.
In the present embodiment, thanks to the improvement of the magnetic integrated device, the dc-dc converter of the present embodiment has the advantages of small overall size, light weight, high power density, and good overall heat dissipation performance. It should be noted that other contents of the dc-dc converter of the present embodiment can be referred to in the prior art, and are not described herein again.
Correspondingly, the embodiment of the present invention further provides a switching power supply, which includes the above-mentioned dc-dc converter. Specifically, the switching power supply is a direct current switching power supply.
In the present embodiment, thanks to the improvement of the magnetic integrated device, the switching power supply of the present embodiment has the advantages of small overall size, light weight, high power density and good overall heat dissipation performance. It should be noted that other contents of the switching power supply of the present embodiment can be referred to in the prior art, and are not described herein again.
It should be noted that other contents of the magnetic integration device, the dc-dc converter and the switching power supply disclosed in the present invention can be referred to in the prior art, and are not described herein again.
In addition, it should be noted that the descriptions related to "first", "second", etc. in the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The above is only the optional embodiment of the present invention, and not therefore the limit to the patent scope of the present invention, all the concepts of the present invention utilize the equivalent structure transformation of the content of the specification and the attached drawings, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A magnetically integrated apparatus comprising a winding structure and a closed loop magnetic core structure, the winding structure comprising a first winding having at least one coil and a second winding having at least one coil; the first winding and the second winding are respectively wound on the surface of the magnetic core structure, and the first winding and the second winding are oppositely arranged or staggered to form at least one inductive magnetic circuit and at least one transformer magnetic circuit.
2. A magnetic integration device in accordance with claim 1, wherein the magnetic core structure comprises first and second oppositely disposed magnetic cores and third and fourth oppositely disposed magnetic cores; wherein the content of the first and second substances,
the first end of the first magnetic core is connected with the first end of the third magnetic core, and the second end of the first magnetic core is connected with the first end of the fourth magnetic core;
the first end of the second magnetic core is connected with the second end of the third magnetic core, and the second end of the second magnetic core is connected with the second end of the fourth magnetic core;
the first winding is wound on the surface of the first magnetic core, and the second winding is wound on the surface of the second magnetic core.
3. A magnetic integration device according to claim 2, wherein the first magnetic core comprises a first sub-core and a second sub-core, the second magnetic core comprises a third sub-core and a fourth sub-core, the first winding comprises a first coil and a second coil, the second winding comprises a third coil and a fourth coil;
the first end of the first secondary magnetic core is connected with the first end of the third magnetic core, the second end of the first secondary magnetic core is connected with the first end of the second secondary magnetic core, and the second end of the second secondary magnetic core is connected with the first end of the fourth magnetic core;
the first end of the third auxiliary magnetic core is connected with the second end of the third magnetic core, the second end of the third auxiliary magnetic core is connected with the first end of the fourth auxiliary magnetic core, and the second end of the fourth auxiliary magnetic core is connected with the second end of the fourth magnetic core;
the first coil is wound on the first secondary magnetic core, the second coil is wound on the second secondary magnetic core, and a gap exists between the first coil and the second coil;
the third coil is wound on the third auxiliary magnetic core, the fourth coil is wound on the fourth auxiliary magnetic core, a gap exists between the third coil and the fourth coil, the third coil is opposite to the first coil, and the fourth coil is opposite to the second coil.
4. A magnetic integration device according to claim 3, wherein a first glue layer is disposed between the first sub-magnetic core and the second sub-magnetic core, and the first sub-magnetic core and the second sub-magnetic core are attached to each other through the first glue layer; and/or the presence of a gas in the atmosphere,
and a second glue layer is arranged between the third auxiliary magnetic core and the fourth auxiliary magnetic core, and the third auxiliary magnetic core is attached to the fourth auxiliary magnetic core through the second glue layer.
5. A magnetic integration device according to claim 3, wherein the first magnetic core further comprises a fifth magnetic core, the second magnetic core further comprises a sixth magnetic core, the first winding further comprises a fifth coil, the second winding further comprises a sixth coil;
the first end of the fifth auxiliary magnetic core is connected with the second end of the first auxiliary magnetic core, and the second end of the fifth auxiliary magnetic core is connected with the first end of the second auxiliary magnetic core;
the first end of the sixth auxiliary magnetic core is connected with the second end of the third auxiliary magnetic core, and the second end of the sixth auxiliary magnetic core is connected with the first end of the fourth auxiliary magnetic core;
the fifth coil is wound on the fifth auxiliary magnetic core, and a gap is formed between the fifth coil and the first coil and between the fifth coil and the second coil;
the sixth coil is wound on the sixth auxiliary magnetic core, intervals exist among the sixth coil, the third coil and the fourth coil, and the sixth coil and the fifth coil are arranged oppositely.
6. The magnetic integration device according to claim 5, wherein a third glue layer is disposed between the fifth sub-magnetic core and each of the first sub-magnetic core and the second sub-magnetic core, and the fifth sub-magnetic core is respectively attached to the first sub-magnetic core and the second sub-magnetic core through the corresponding third glue layer; and/or the presence of a gas in the atmosphere,
and a fourth glue layer is arranged between the sixth auxiliary magnetic core and the third auxiliary magnetic core and between the fourth auxiliary magnetic core, and the fifth auxiliary magnetic core is respectively attached to the third auxiliary magnetic core and the fourth auxiliary magnetic core through the corresponding fourth glue layer.
7. A magnetic integration device according to claim 1, wherein the magnetic core structure is circular, or the magnetic core structure is a UU-type combined magnetic core or UI-type combined magnetic core in a shape of a square.
8. A magnetic integration device according to any one of claims 2 to 6, wherein the first magnetic core is symmetrically disposed with the second magnetic core about a middle portion of the third magnetic core, and the third magnetic core is symmetrically disposed with the fourth magnetic core about a middle portion of the first magnetic core; and/or the presence of a gas in the atmosphere,
the first magnetic core and/or the second magnetic core are columnar; and/or the presence of a gas in the atmosphere,
the third magnetic core and/or the fourth magnetic core are flat.
9. A dc-dc converter comprising a magnetically integrated device according to any of claims 1 to 8.
10. A switching power supply comprising a dc-dc converter according to claim 9.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050026A (en) * | 2021-11-30 | 2022-02-15 | 杭州云电科技能源有限公司 | Magnetic assembly, manufacturing method thereof, power module and switching power supply |
| CN114244074A (en) * | 2021-12-18 | 2022-03-25 | 北京动力源科技股份有限公司 | Current-expanding annular transformer and magnetic integration structure and method of current-expanding annular transformer and resonant converter |
-
2021
- 2021-03-04 CN CN202120476885.8U patent/CN214505209U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050026A (en) * | 2021-11-30 | 2022-02-15 | 杭州云电科技能源有限公司 | Magnetic assembly, manufacturing method thereof, power module and switching power supply |
| CN114244074A (en) * | 2021-12-18 | 2022-03-25 | 北京动力源科技股份有限公司 | Current-expanding annular transformer and magnetic integration structure and method of current-expanding annular transformer and resonant converter |
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Effective date of registration: 20230616 Address after: Room 1801, 1901, Unit 1, Huichuan Technology Headquarters Building, No. 6 Lanqing 2nd Road, Luhu Community, Guanhu Street, Longhua District, Shenzhen, Guangdong 518000 Patentee after: Huichuan New Energy Vehicle Technology (Shenzhen) Co.,Ltd. Address before: 518000 building e, Hongwei Industrial Park, Liuxian 2nd Road, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN INOVANCE TECHNOLOGY Co.,Ltd. |