Decoupled integrated transformer and power supply

Abstract

The utility model provides a kind of decoupling integrated transformer and power supply, the decoupling integrated transformer includes framework and magnetic core, framework has first baffle and second baffle, first baffle and second baffle are spaced apart with partition gap, and first winding part and second winding part are formed respectively on the framework of the side of first baffle and second baffle away from partition gap;Magnetic core is annularly arranged on the outer periphery of framework, and at least part of the structure of magnetic core penetrates framework;Formed with primary side winding in first winding part, formed with secondary side winding in second winding part, primary side winding and secondary side winding are separated by partition gap, to generate leakage inductance of primary side winding and secondary side winding as resonance inductance.The utility model solves the technical problem that additional resonance inductance needs to be added on transformer, which leads to the increase of transformer volume and cost.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a decoupled integrated transformer and power supply. Background Technology

[0002] Currently, all LLC topology power supplies require three basic components as their framework: a transformer, a resonant inductor, and a resonant capacitor. In actual construction, an additional resonant inductor (including a resonant coil and a resonant inductor core) needs to be added to the main transformer coil and core. However, this additional coil and core increase the transformer size and cost, resulting in poor economic efficiency.

[0003] Therefore, this utility model proposes a decoupled integrated transformer and power supply to overcome the shortcomings of the prior art. Utility Model Content

[0004] The purpose of this invention is to provide a decoupled integrated transformer and power supply. By adjusting the isolation distance between the primary and secondary coils of the transformer, the leakage inductance parameters of the transformer can be controlled, so that the leakage inductance of the transformer can act as a resonant inductor. Therefore, there is no need to set an additional resonant inductor, which effectively reduces the size and cost of the transformer and makes the structure of the transformer simpler.

[0005] The objective of this utility model can be achieved by the following approach:

[0006] This utility model is a decoupled integrated transformer, comprising:

[0007] A frame having a first partition and a second partition, with a partition gap between the first partition and the second partition, and a first winding portion formed on the side of the frame facing away from the partition gap on the first partition, and a second winding portion formed on the side of the frame facing away from the partition gap on the second partition.

[0008] A magnetic core, wherein the magnetic core is disposed around the outer periphery of the frame, and at least a portion of the structure of the magnetic core penetrates the frame;

[0009] The primary side winding is provided in the first winding section;

[0010] The secondary winding formed in the second winding section separates the primary winding from the secondary winding by a gap, so that the leakage inductance generated by the primary winding and the secondary winding is used as a resonant inductance.

[0011] In a preferred embodiment of this utility model, the frame has a first limiting plate, which is located on the side of the first partition facing away from the partition gap, so as to form the first winding portion on the frame between the first limiting plate and the first partition; and / or,

[0012] The frame has a second limiting plate, which is located on the side of the second partition away from the partition gap, so as to form the second winding portion on the frame between the second limiting plate and the second partition.

[0013] In a preferred embodiment of the present invention, the frame is a cylindrical structure with openings at both ends, the first limiting plate and the second limiting plate are respectively disposed at both ends of the frame, and the first partition plate and the second partition plate are both disposed between the first limiting plate and the second limiting plate.

[0014] In a preferred embodiment of this utility model, the sum of the width of the partition gap, the thickness of the first partition and the thickness of the second partition is 3.1mm-3.5mm.

[0015] In a preferred embodiment of this utility model, the width of the partition gap is 1.0mm-1.5mm.

[0016] In a preferred embodiment of this utility model, the decoupled integrated transformer further includes a housing.

[0017] The housing includes a top shell and a bottom shell, the top shell is disposed on one end face of the bottom shell, and the top shell has an accommodating space, in which the frame, the primary winding and the secondary winding are located.

[0018] In a preferred embodiment of this utility model

[0019] The top shell has a first hollow portion and a second hollow portion that communicate with the accommodating space.

[0020] The primary winding is located below the first hollowed-out portion, and the secondary winding is located below the second hollowed-out portion.

[0021] In a preferred embodiment of the present invention, the top shell protrudes from one end face of the bottom shell to form an annular recess between the outer wall of the top shell and the outer wall of the bottom shell, and the magnetic core is located in the recess and is arranged around the outer periphery of the top shell;

[0022] The skeleton has a hollow channel, and the magnetic core is formed by splicing two magnetic core segments. Each of the two magnetic core segments has a magnetic core central column in the middle. When the two magnetic core segments are spliced, the two magnetic core central columns are respectively inserted into the hollow channel from both ends of the hollow channel.

[0023] In a preferred embodiment of this utility model, an air gap is left between the ends of the two magnetic core columns.

[0024] This utility model provides a power supply having the above-mentioned decoupled integrated transformer.

[0025] Based on the above, the features and advantages of the decoupled integrated transformer and power supply of this utility model are:

[0026] By setting the first and second partitions on the frame, a partition gap can be formed between the first and second partitions. A first winding portion and a second winding portion are formed on the frame on both sides of the partition gap, respectively. Coils can be wound on the first winding portion and the second winding portion to form a primary winding and a secondary winding. The partition gap can separate the primary winding and the secondary winding. By controlling the size (i.e., the width) of the partition gap and adjusting the coil turns ratio of the primary winding and the secondary winding, the coupling between the primary and secondary windings can be reduced, thereby increasing the leakage inductance. The leakage inductance generated by the primary winding and the secondary winding can act as a resonant inductor. Therefore, the decoupled integrated transformer of this utility model does not require an additional resonant inductor, which can effectively reduce the size and cost of the transformer and make the structure of the transformer simpler. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0028] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0029] Figure 1 This is a front cross-sectional view of the decoupled integrated transformer of this utility model;

[0030] Figure 2 This is a perspective view of the decoupled integrated transformer of this utility model;

[0031] Figure 3This is a front view of the frame in the decoupled integrated transformer of this utility model;

[0032] Figure 4 This is a three-dimensional view of the skeleton in the decoupled integrated transformer of this utility model;

[0033] Figure 5 This is a perspective view of the housing in the decoupled integrated transformer of this utility model.

[0034] The reference numerals in the accompanying drawings of this utility model are:

[0035] 1. Frame; 101. First partition;

[0036] 102. Second partition; 103. Partition gap;

[0037] 104. First winding section; 105. Second winding section;

[0038] 106. First limiting plate; 107. Second limiting plate;

[0039] 108. Hollow channel; 2. Primary side winding;

[0040] 3. Secondary winding; 4. Magnetic core;

[0041] 401. Core post; 5. Housing;

[0042] 501, Top shell; 5011, First hollow section;

[0043] 5012, Second hollow section; 5013, Through hole;

[0044] 502. Bottom shell; 503. Recessed portion. Detailed Implementation

[0045] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0046] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] Implementation Method 1

[0049] like Figures 1 to 5 As shown, this utility model provides a decoupled integrated transformer, which includes a frame 1 and a magnetic core 4. The frame 1 has a first partition 101 and a second partition 102. A partition gap 103 is separated between the first partition 101 and the second partition 102. A first winding portion 104 is formed on the frame 1 on the side of the first partition 101 facing away from the partition gap 103, and a second winding portion 105 is formed on the frame 1 on the side of the second partition 102 facing away from the partition gap 103. The magnetic core 4 is arranged around the outer periphery of the frame 1, and at least a part of the structure of the magnetic core 4 penetrates the frame 1; a primary winding 2 (i.e., the primary winding of the transformer) is formed by winding a coil on the first winding part 104, and a secondary winding 3 (i.e., the secondary winding of the transformer) is formed by winding a coil on the second winding part 105. The primary winding 2 and the secondary winding 3 can be separated by the partition gap 103 so that the leakage inductance generated by the primary winding 2 and the secondary winding 3 can be used as the resonant inductance.

[0050] In this utility model, by setting the first partition 101 and the second partition 102 on the frame 1, a partition gap 103 can be formed between the first partition 101 and the second partition 102. A first winding portion 104 and a second winding portion 105 are respectively formed on the frame 1 located on both sides of the partition gap 103. Thus, a coil can be wound on the first winding portion 104 to form a primary side winding 2, and a coil can be wound on the second winding portion 105 to form a secondary side winding 3. During operation, the primary winding 2 generates an alternating magnetic field under the action of alternating current. The magnetic lines of force of the alternating magnetic field reach the second winding section 105, causing the secondary winding 3 to induce an electromotive force. However, some magnetic lines of force of the alternating magnetic field cannot couple to the secondary winding 3 and return directly to the primary winding 2. These magnetic lines of force are the leakage inductance generated by the primary winding 2 and the secondary winding 3. This invention can separate the primary winding 2 and the secondary winding 3 through the partition gap 103. By controlling the size (i.e., width) of the partition gap 103 and adjusting the coil turns ratio of the primary winding 2 and the secondary winding 3, the coupling between the primary and secondary windings can be reduced, thereby increasing the leakage inductance. This allows the leakage inductance generated by the primary winding 2 and the secondary winding 3 to act as a resonant inductor. Therefore, the decoupled integrated transformer of this invention does not require an additional resonant inductor, effectively reducing the size and cost of the transformer and simplifying its structure.

[0051] In this invention, given a fixed size (i.e., width) of the partition gap 103, the leakage inductance can be adjusted by changing the number of turns in the primary winding 2 and / or the secondary winding 3, thereby achieving the desired ratio of turns between the primary winding 2 and the secondary winding 3. However, the technical solution of this application requires that the number of turns in the primary winding 2 be greater than the number of turns in the secondary winding 3, so that the leakage inductance increases with the increase in the number of turns in the primary winding 2, thus meeting the requirement for using the leakage inductance as a resonant inductor.

[0052] Furthermore, in an optional embodiment of this utility model, the width of the partition gap 103 ranges from 1.0mm to 1.5mm, preferably 1.3mm. The sum of the width of the partition gap 103, the thickness of the first partition 101, and the thickness of the second partition 102 is 3.1mm to 3.5mm. A larger width of the partition gap 103 results in greater leakage inductance, but excessive leakage inductance can lead to excessive energy loss and reduced efficiency, thus affecting the transformer's performance. Therefore, in this embodiment, setting the sum of the width of the partition gap 103, the thickness of the first partition 101, and the thickness of the second partition 102 to 3.1mm-3.5mm balances the requirements for using leakage inductance as a resonant inductor and the impact of leakage inductance on transformer performance, ensuring that the transformer of this utility model can operate efficiently. Preferably, the sum of the width of the partition gap 103, the thickness of the first partition 101, and the thickness of the second partition 102 is 3.1mm.

[0053] In an optional embodiment of this invention, the ratio of the number of turns in the primary winding 2 to the number of turns in the secondary winding 3 is set to 30:9-35:9, in conjunction with the width of the partition gap 103. As shown in Table 1 below, without changing the number of turns in the secondary winding 3, the corresponding leakage inductance value is obtained by adjusting the number of turns in the primary winding 2. Preferably, the ratio of the number of turns in the primary winding 2 to the number of turns in the secondary winding 3 is 33:9. Under the condition that this turns ratio is matched with the width of the partition gap 103, not only is the requirement of using leakage inductance as a resonant inductor met, but it can also be adapted to the power supply components.

[0054]

[0055] Table 1

[0056] In one optional embodiment of this utility model, such as Figure 3 and Figure 4As shown, the frame 1 has a cylindrical structure with openings at both ends. The frame 1 has a first limiting plate 106 located on the side of the first partition 101 facing away from the partition gap 103, forming a first winding portion 104 on the frame 1 between the first limiting plate 106 and the first partition 101. Additionally, the frame 1 may also have a second limiting plate 107 located on the side of the second partition 102 facing away from the partition gap 103, forming a second winding portion 105 on the frame 1 between the second limiting plate 107 and the second partition 102. The first limiting plate 106 and the second limiting plate 107 are respectively disposed at both ends of the frame 1, while the first partition 101 and the second partition 102 are both disposed near the middle of the frame 1, such that the first partition 101 and the second partition 102 are both disposed between the first limiting plate 106 and the second limiting plate 107. According to actual needs, the positions of the first partition 101 and / or the second partition 102 can be adjusted, thereby adjusting the size of the first winding part 104 and / or the second winding part 105 to adapt to the coil with the corresponding number of turns.

[0057] In one optional embodiment of this utility model, such as Figure 2 and Figure 5 As shown, the decoupled integrated transformer also includes a housing 5, which includes a top shell 501 and a bottom shell 502. The top shell 501 is a cuboid structure with one end open. The top shell 501 is fixedly disposed on one side end face of the bottom shell 502, covering the pin header through the bottom shell 502. The top shell 501 protrudes from the end face of the bottom shell 502, and the top shell 501 has an accommodating space. The bobbin 1, the primary winding 2, and the secondary winding 3 are located in the accommodating space. In addition, the top shell 501 has a first hollow portion 5011 and a second hollow portion 5012 that communicate with the accommodating space. When the bobbin 1, the primary winding 2, and the secondary winding 3 are located in the accommodating space, the primary winding 2 is located below the first hollow portion 5011, and the secondary winding 3 is located below the second hollow portion 5012.

[0058] The housing 5 is made of insulating material.

[0059] In the above embodiments, such as Figure 2 and Figure 5 As shown, by the cooperation of the top shell 501 and the bottom shell 502, an annular recess 503 can be formed between the outer wall of the top shell 501 and the outer wall of the bottom shell 502. The magnetic core 4 is located in the recess 503 and is arranged around the outer periphery of the top shell 501.

[0060] Furthermore, in an optional embodiment of this utility model, such as Figure 2 and Figure 4As shown, the cylindrical frame 1 has a hollow channel 108. The magnetic core 4 is formed by splicing two magnetic core segments. Each of the two magnetic core segments has a magnetic core pillar 401 (i.e., a magnetic pillar) in the middle. That is, the two magnetic core segments are "E"-shaped magnetic cores. When the two magnetic core segments are spliced, the two magnetic core pillars 401 are inserted into the hollow channel 108 from both ends, and an air gap is left between the ends of the two magnetic core pillars 401. The remaining parts of the two magnetic core segments cooperate to form a square frame structure surrounding the outer periphery of the top shell 501. The two magnetic core pillars 401 cooperate not only through the hollow channel 108 of the frame 1, but also through the shell 5. The two magnetic core segments can be symmetrical or asymmetrical.

[0061] In a preferred embodiment of this invention, a symmetrical structure with two magnetic core segments is adopted. Its advantages are: 1. The symmetrical magnetic core structure reduces leakage flux, helps the magnetic field to close more uniformly within the core, and significantly reduces the degree of magnetic field leakage. 2. The structure is more stable and has stronger reliability. 3. The geometrically symmetrical structure promotes uniform heat distribution, thereby optimizing the heat distribution of the magnetic core, improving its heat dissipation capacity, and avoiding the generation of local hot spots; the symmetrical structure helps the magnetic core to have a more even temperature during operation, reducing the risk of performance degradation or failure due to local overheating, and improving thermal management capabilities and service life. 4. It optimizes magnetic core efficiency and energy transmission, helping to make the magnetic circuit more uniform and the magnetic resistance lower, thereby enhancing electromagnetic induction efficiency, making energy transmission within the magnetic core more concentrated and less lossy, and improving the overall energy efficiency of the transformer. 5. The symmetrical structure with two magnetic core segments is easier to assemble and form, facilitating consistency in assembly and manufacturing.

[0062] Of course, the magnetic core 4 can also be a square frame structure magnetic core, which is an integral structure, and two magnetic pillars are inserted in the hollow channel 108 of the skeleton 1. There is an air gap between the ends of the two magnetic pillars. After the magnetic core 4 is fitted on the outer periphery of the top shell 501, the other ends of the two magnetic pillars are connected to the square frame structure magnetic core respectively. The two magnetic pillars are equivalent to the magnetic core middle pillar 401 in the above embodiment.

[0063] The features and advantages of this decoupled integrated transformer are:

[0064] I. This decoupled integrated transformer can separate the primary winding 2 and the secondary winding 3 by setting the isolation gap 103. By controlling the size of the isolation gap 103 and adjusting the coil turns ratio of the primary winding 2 and the secondary winding 3, the coupling between the primary and secondary windings can be reduced, thereby increasing the leakage inductance. This allows the leakage inductance to function as a resonant inductor, thus saving the cost of setting a resonant inductor. This results in better economic efficiency without affecting the transformer's working efficiency.

[0065] Second, this decoupled integrated transformer can use the leakage inductance generated by the primary winding 2 and the secondary winding 3 as a resonant inductor, so there is no need to set an additional resonant inductor, which effectively reduces the size of the transformer (the size can be reduced by 20%-30%).

[0066] Third, in this decoupled integrated transformer, since there is no need to set an additional resonant inductor, the magnetic core 4 is assembled around the outer periphery of the housing 5, which makes the structure simpler and easier to manufacture.

[0067] Implementation Method 2

[0068] This invention provides a power supply having the aforementioned decoupled integrated transformer.

[0069] The power supply of this utility model has the same characteristics and advantages as the decoupled integrated transformer mentioned above, which will not be repeated here.

[0070] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0071] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0072] The above are merely several embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A decoupled integrated transformer, characterized in that, include: A frame having a first partition and a second partition, with a partition gap between the first partition and the second partition, and a first winding portion formed on the side of the frame facing away from the partition gap on the first partition, and a second winding portion formed on the side of the frame facing away from the partition gap on the second partition. A magnetic core, wherein the magnetic core is disposed around the outer periphery of the frame, and at least a portion of the structure of the magnetic core penetrates the frame; The primary side winding is provided in the first winding section; The secondary winding formed in the second winding section separates the primary winding from the secondary winding by a gap, so that the leakage inductance generated by the primary winding and the secondary winding is used as a resonant inductance.

2. The decoupled integrated transformer as described in claim 1, characterized in that, The frame has a first limiting plate, which is located on the side of the first partition away from the partition gap, so as to form the first winding portion on the frame between the first limiting plate and the first partition. And / or, The frame has a second limiting plate, which is located on the side of the second partition away from the partition gap, so as to form the second winding portion on the frame between the second limiting plate and the second partition.

3. The decoupled integrated transformer as described in claim 2, characterized in that, The frame is a cylindrical structure with openings at both ends. The first limiting plate and the second limiting plate are respectively disposed at both ends of the frame, and the first partition and the second partition are both disposed between the first limiting plate and the second limiting plate.

4. The decoupled integrated transformer as described in any one of claims 1 to 3, characterized in that, The sum of the width of the partition gap, the thickness of the first partition, and the thickness of the second partition is 3.1mm-3.5mm.

5. The decoupled integrated transformer as described in claim 4, characterized in that, The width of the partition gap is 1.0mm-1.5mm.

6. The decoupled integrated transformer as described in claim 1, characterized in that, The decoupled integrated transformer also includes a housing. The housing includes a top shell and a bottom shell, the top shell is disposed on one end face of the bottom shell, and the top shell has an accommodating space, in which the frame, the primary winding and the secondary winding are located.

7. The decoupled integrated transformer as described in claim 6, characterized in that, The top shell has a first hollow portion and a second hollow portion that communicate with the accommodating space. The primary winding is located below the first hollowed-out portion, and the secondary winding is located below the second hollowed-out portion.

8. The decoupled integrated transformer as described in claim 6 or 7, characterized in that, The top shell protrudes from one end face of the bottom shell to form an annular recess between the outer wall of the top shell and the outer wall of the bottom shell. The magnetic core is located in the recess and is arranged around the outer periphery of the top shell. The skeleton has a hollow channel, and the magnetic core is formed by splicing two magnetic core segments. Each of the two magnetic core segments has a magnetic core central column in the middle. When the two magnetic core segments are spliced, the two magnetic core central columns are respectively inserted into the hollow channel from both ends of the hollow channel.

9. The decoupled integrated transformer as described in claim 8, characterized in that, An air gap is left between the ends of the two core columns.

10. A power supply, characterized in that, The power supply has a decoupled integrated transformer as described in any one of claims 1 to 9.

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