CN211555646U - Resonance transformer - Google Patents

Abstract

A resonance transformer comprises a magnetic core group, a primary winding, a secondary winding and at least one magnetic part. The magnetic core group comprises magnetic columns. A primary winding is disposed around the pole. The secondary winding is disposed around the primary winding. At least one magnetic part is arranged between the primary winding and the secondary winding so as to improve the leakage inductance between the primary winding and the secondary winding.

Description

Resonant transformer

technical field

This case is about a transformer, especially a resonant transformer.

Background technique

Transformer is a magnetic component often used in various electrical equipment. It uses the principle of electric energy and magnetic energy conversion and induction to adjust different voltages so that it can reach the applicable range of electrical equipment. In the power supply system of electronic products such as LCD TV, the transformer is mainly a transformer with leakage inductance, such as a resonant transformer (LLC transformer), in order to reduce the switching loss and reduce noise.

Generally speaking, under the existing resonant transformer structure, a resonant inductance is added outside the main transformer to meet the requirements of the main inductance and leakage inductance on the circuit. However, the external resonant inductance of the main transformer makes the overall structure bulky, and the external resonant inductance will inevitably occupy part of the board structure of the main transformer, which not only reduces its power density, but also makes the assembly process more complicated.

In another existing resonant transformer architecture, the primary winding and the secondary winding of the main transformer are separated by slots to meet the requirements of the main inductance and the leakage inductance in the circuit. However, the arrangement of the sub-slots will lead to an increase in the overall structural volume of the transformer, which cannot meet the requirement of reducing the volume and is difficult to meet the development trend of miniaturization. Limited by the excessively large volume of the existing resonant transformer, its power density is also difficult to improve.

In view of this, it is necessary to develop an improved resonant transformer to solve the problems faced by the prior art.

Utility model content

The main purpose of this case is to provide a resonant transformer to solve the problems of the existing resonant transformer, such as excessive volume, low power density, and complicated assembly process of components.

Another main purpose of this case is to provide a resonant transformer, which can achieve the effects of improving power density and volume miniaturization without adding additional resonant inductance components through magnetic components arranged between the secondary winding and the primary winding. .

Another main purpose of the present application is to provide a resonant transformer, which can improve the convenience of component assembly by integrally forming a magnetic component and a magnetic core assembly. In addition, the resonant transformer of the present application is provided with the winding frame, so that the secondary winding can be wound in it, so that the overall structure is more stable, and the power density of the power supply can be effectively improved. In addition, by arranging the magnetic element in the bobbin, the convenience of assembly of the components can be further improved.

In order to achieve the above objective, a broader implementation aspect of the present application is to provide a resonant transformer, which includes a magnetic core group, a primary winding, a secondary winding and at least one magnetic component. The core set contains magnetic posts. The primary winding is arranged around the magnetic column. The secondary winding is arranged around the primary winding. At least one magnetic element is arranged between the primary winding and the secondary winding to improve the leakage inductance between the primary winding and the secondary winding.

In one embodiment, the magnetic element is a magnetic disk, and the magnetic disk is a detachable magnetic disk or a floppy disk.

In one embodiment, the magnetic core set includes a first magnetic core and a second magnetic core, the first magnetic core includes a first center column, the second magnetic core includes a second center column, and the The first central column is assembled with the second central column to form the magnetic column.

In one embodiment, the magnetic element includes at least two magnetic walls, at least one of the magnetic walls is integrally formed with the first magnetic core, and at least one of the magnetic walls is integrally formed with the second magnetic core.

In one embodiment, the magnetic element has at least one notch.

In one embodiment, a bobbin is further included, and the bobbin includes an annular wall.

In one embodiment, the magnetic element is disposed between the annular wall of the bobbin and the primary winding.

In one embodiment, the magnetic element is disposed between the annular wall of the bobbin and the secondary winding.

In one embodiment, the magnetic element is disposed in the annular wall of the bobbin.

In one embodiment, the bobbin and the magnetic element are integrally formed.

In one embodiment, the primary winding and the secondary winding are each made of at least one conductive conductor selected from an air-core coil, a flat wire, a copper foil, or a three-layer insulated wire.

Description of drawings

FIG. 1A is a schematic structural diagram of a resonant transformer according to an embodiment of the present invention.

FIG. 1B is a schematic diagram of an exploded structure of the resonant transformer shown in FIG. 1A .

FIG. 1C is a schematic cross-sectional view of a resonant transformer according to an embodiment of the present invention.

FIG. 2A is a schematic diagram of an exploded structure of a resonant transformer according to an embodiment of the present invention.

2B is a schematic cross-sectional view of a resonant transformer according to an embodiment of the present invention.

FIG. 3A is a schematic structural diagram of a resonant transformer according to an embodiment of the present invention.

FIG. 3B is a schematic diagram of an exploded structure of the resonant transformer shown in FIG. 3A .

3C is a schematic cross-sectional view of a resonant transformer according to an embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a resonant transformer according to an embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view of a resonant transformer according to an embodiment of the present invention.

where the reference number:

1, 1a, 1b, 1c, 1d: Resonant transformers

2: Magnetic core group

20: Magnetic column

21: The first magnetic core

210: First jamb

211: The first central column

22: The second magnetic core

220: Second jamb

221: Second center column

23: First air gap

24: Second air gap

3: Primary winding

4: Secondary winding

5, 6: Magnetic parts

51: first disk

52: Second disk

53: Notch

61: First Magnetic Wall

62: Second Magnetic Wall

63: Third Magnetic Wall

64: Fourth Magnetic Wall

7: Winding frame

71: Ring Wall

72: hollow part

73: Pin

74: First bezel

75: Second bezel

Detailed ways

Some typical embodiments embodying the features and advantages of the present case will be described in detail in the description of the latter paragraph. It should be understood that this case can have various changes in different aspects, all of which do not depart from the scope of this case, and the descriptions and diagrams therein are essentially used for illustration rather than limiting the present case.

Please refer to FIGS. 1A to 1C of this application, wherein FIG. 1A is a schematic structural diagram of a resonant transformer according to an embodiment of the application, FIG. 1B is a schematic diagram of an exploded structure of the resonant transformer shown in FIG. 1A , and FIG. 1C is a schematic diagram of the resonant transformer according to an embodiment of the application. Schematic cross section. The resonant transformer 1 of an embodiment of the present application includes a magnetic core group 2 , a primary winding 3 , a secondary winding 4 and at least one magnetic element 5 . The core set 2 includes a magnetic column 20 . The primary winding 3 is arranged around the magnetic column 20 . The secondary winding 4 is arranged around the primary winding 3 . At least one magnetic element 5 is disposed between the primary winding 3 and the secondary winding 4 to improve the leakage inductance between the primary winding 3 and the secondary winding 4 . In this way, the resonant transformer 1 of the present embodiment does not need to add additional resonant inductance components, so that the overall power density of the power supply is improved, not only the leakage inductance of the required strength is achieved, but also the effect of volume miniaturization is achieved.

In an embodiment of the present application, the magnetic core set 2 can be, but is not limited to, an EE-type magnetic core set, which has a first magnetic core 21 and a second magnetic core 22 that are symmetrically arranged with each other. The first magnetic core 21 includes two first side pillars 210 and one first center pillar 211 . The two first side pillars 210 are respectively located at two ends of one side surface of the first magnetic core 21 , and the first middle pillar 211 is located between the two first side pillars 210 . The second magnetic core 22 includes two second side pillars 220 and one second center pillar 221 . The two second side pillars 220 are respectively located at two ends of one side surface of the second magnetic core 22 , and the second center pillar 221 is located between the two second side pillars 220 . The first magnetic core 21 and the second magnetic core 22 are joined to each other, so that the two first side pillars 210 are respectively assembled with the two second side pillars 220 , and the two first air gaps 23 are respectively formed in the two first side pillars 220 . Between the side pillars 210 and the two second side pillars 220 ; and the first center pillar 211 and the second center pillar 221 are correspondingly assembled to form the magnetic pillar 20 , and the second air gap 24 is formed between the first center pillar 211 and the second center pillar 221 . Between the central pillars 221. In this embodiment, by grinding the first center pillars 211 and the second center pillars 221 , the first center pillars 211 and the second center pillars 221 are respectively lower than the contact between the two outer first side pillars 210 and the second side pillars 220 . face, so that the first air gap 23 and the second air gap 24 can reach the required width, thereby achieving the main inductance and leakage inductance of the required strength. The first side pillars 210 and the first center pillars 211 and the second side pillars 220 and the second center pillars 221 may be, but not limited to, connected by glue. The structure of the magnetic core group 2 in this case is not limited to the above-mentioned embodiment, and it can also be, but not limited to, an EI-type magnetic core group, and can be changed arbitrarily according to actual needs.

In this embodiment, the primary winding 3 is arranged around the magnetic column 20 of the magnetic core group 2, the secondary winding 4 is arranged around the outer side of the primary winding 3, and the magnetic element 5 is arranged between the primary winding 3 and the secondary winding 4, The magnetic coupling between the primary winding 3 and the secondary winding 4 is reduced, thereby achieving a leakage inductance of the required strength. The primary winding 3 and the secondary winding 4 are each made of at least one conductive conductor such as an air-core coil, a flat wire, a copper foil or a three-layer insulated wire, but not limited thereto. The primary winding 3 of this embodiment is shown as an air-core coil in FIG. 1B , and the secondary winding 4 is shown as a three-layer insulated wire in FIG. 1B , but not limited thereto.

In some embodiments, the magnetic element 5 can be, but is not limited to, one or more than one magnetic disk, wherein the magnetic disk can be a floppy disk or a detachable magnetic disk, and the detachable magnetic disk is detachably disposed on the primary winding 3 and the secondary winding. between 4. In addition, the magnetic permeability (μ value) of the magnetic disk can be adjusted according to requirements, so that the magnetic coupling between the primary winding 3 and the secondary winding 4 can be adjusted to the required strength, thereby achieving the leakage inductance of the required strength.

Please refer to Figure 1B again. As shown in FIG. 1B , the magnetic element 5 includes a first magnetic disk 51 and a second magnetic disk 52 . When the first magnetic disk 51 and the second magnetic disk 52 are arranged between the primary winding 3 and the secondary winding 4 , the first magnetic disk 51 and the second magnetic disk 52 are not in contact with each other, and two notches 53 are formed for the primary winding 3 to come out. . In other embodiments, the number of the notches 53 of the magnetic element 5 is not limited to the two shown in FIG. 1B , but can be one or more than three, which can be arbitrarily changed according to actual needs.

Please refer to FIGS. 2A to 2B of the present application, wherein FIG. 2A is a schematic diagram of an exploded structure of a resonant transformer according to an embodiment of the present application, and FIG. 2B is a schematic cross-sectional diagram of the resonant transformer according to an embodiment of the present application. The structure of the resonant transformer 1a of an embodiment of the present application is similar to that of the resonant transformer 1 shown in FIG. 1A to FIG. 1C , and the same component symbols represent the same components and functions, so they will not be repeated here. In this embodiment, the magnetic member 6 of the resonant transformer 1a is integrally formed with the magnetic core set 2, and the magnetic member 6 is disposed between the primary winding 3 and the secondary winding 4, so as to improve the gap between the primary winding 3 and the secondary winding 4. leakage inductance.

In this embodiment, the magnetic core set 2 is also described by taking an EE-type magnetic core set as an example, and its structure is also similar to that of the previous embodiment, and the same symbols represent the same components and functions. In this embodiment, the magnetic element 6 includes a first magnetic wall 61 , a second magnetic wall 62 , a third magnetic wall 63 and a fourth magnetic wall 64 . The first magnetic wall 61 and the second magnetic wall 62 are integrally formed with the first magnetic core 21 . The first magnetic wall 61 and the second magnetic wall 62 protrude from a side surface of the first magnetic core 21 and are disposed around the first central column 211 . Both ends of the first magnetic wall 61 and the second magnetic wall 62 are not in contact with each other. The third magnetic wall 63 and the fourth magnetic wall 64 are integrally formed with the second magnetic core 22 . The third magnetic wall 63 and the fourth magnetic wall 64 protrude from one side surface of the second magnetic core 22 and are disposed around the second central column 221. Both ends of the third magnetic wall 63 and the fourth magnetic wall 64 are not in contact with each other.

As shown in FIG. 2B , when the first magnetic core 21 and the second magnetic core 22 are joined to each other, the two first side pillars 210 are respectively assembled with the two second side pillars 220 , and the first center pillar 211 and the second side pillars 220 are respectively assembled. The middle columns 221 are assembled correspondingly to form the magnetic column 20 . The first magnetic wall 61 and the second magnetic wall 62 are respectively assembled with the third magnetic wall 63 and the fourth magnetic wall 64 to form the magnetic member 6 . After the first magnetic core 21 and the second magnetic core 22 are joined to each other, the two ends of the first magnetic wall 61 and the third magnetic wall 63 and the two ends of the second magnetic wall 62 and the fourth magnetic wall 64 are not in contact with each other, forming two gaps. (not shown). In this way, the primary winding 3 can go out through the two notches, but it is not limited to this, and the number and arrangement of the notches can be changed arbitrarily according to the actual situation. The first magnetic wall 61 and the second magnetic wall 62 of the magnetic element 6 are integrally formed with the first magnetic core 21 , and the third magnetic wall 63 and the fourth magnetic wall 64 are integrally formed with the second magnetic core 22 , not only the leakage inductance of the required strength can be achieved , and also improve the convenience of component assembly.

Please refer to FIGS. 3A to 3C of this application, wherein FIG. 3A is a schematic structural diagram of a resonant transformer according to an embodiment of the application, FIG. 3B is a schematic diagram of an exploded structure of the resonant transformer shown in FIG. 3A , and FIG. 3C is a schematic diagram of the resonant transformer according to an embodiment of the application. Schematic cross section. The resonant transformer 1b of this embodiment is similar in structure to the resonant transformer 1 shown in FIG. 1A to FIG. 1C , wherein the same component symbols represent the same components and functions, and thus will not be repeated here. In this embodiment, the resonant transformer 1b further includes a winding frame 7 . The bobbin 7 includes an annular wall 71 , a hollow portion 72 , a plurality of pins 73 , a first baffle 74 and a second baffle 75 . The first baffle plate 74 and the second baffle plate 75 are respectively provided at both ends of the annular wall 71 . The hollow portion 72 is defined in the hollow area surrounded by the annular wall 71 , and the hollow portion 72 penetrates the first baffle plate 74 and the second baffle plate 75 . A plurality of pins 73 are disposed on one side of the second baffle 75 . The secondary winding 4 is arranged around the annular wall 71 of the bobbin 7. The magnetic member 5 is arranged in the hollow portion 72 and between the annular wall 71 of the bobbin 7 and the primary winding 3 , thereby achieving the leakage inductance of the required strength. Through the arrangement of the bobbin 7, the secondary winding 4 can be wound and arranged therein, so that the overall structure of the resonant transformer 1b is more stable, thereby improving the power density of the power supply.

Please refer to FIG. 4 of the present application, wherein FIG. 4 is a schematic cross-sectional view of a resonant transformer according to an embodiment of the present application. The resonant transformer 1c of this embodiment is similar in structure to the resonant transformer 1b shown in FIG. 3C , and the same component symbols represent the same components and functions, and thus will not be repeated here. In this embodiment, the magnetic member 5 of the resonant transformer 1c is disposed around the annular wall 71 of the bobbin 7, and is disposed between the annular wall 71 of the bobbin 7 and the secondary winding 4, thereby raising the primary Leakage inductance between winding 3 and secondary winding 4.

Please refer to FIG. 5 of the present application, wherein FIG. 5 is a schematic cross-sectional view of a resonant transformer according to an embodiment of the present application. The structure of the resonant transformer 1d of this embodiment is similar to that of the resonant transformer 1b shown in FIG. 3C , wherein the same component symbols represent the same components and functions, and thus will not be repeated here. In this embodiment, the magnetic member 5 of the resonant transformer 1 d is disposed in the annular wall 71 of the bobbin 7 , and the magnetic member 5 is completely covered by the annular wall 71 . The primary winding 3 is arranged in the hollow portion 72, and the secondary winding 4 is arranged around the annular wall 71, so that the magnetic member 5 is arranged between the primary winding 3 and the secondary winding 4, thereby raising the gap between the primary winding 3 and the secondary winding 4 At the same time, the complexity of component assembly is reduced, and the convenience of component assembly is improved. In some embodiments, the magnetic element 5 and the bobbin 7 are integrally formed. In some embodiments, the magnetic member 5 is integrally formed in the annular wall 71 of the bobbin 7 by means of injection molding, but it is not limited thereto.

To sum up, the present application discloses a resonant transformer, which is arranged between the secondary winding and the primary winding through a magnetic element, without the need for additional resonant inductance components, so as to achieve the effects of improving the power density of the power supply and miniaturizing the volume. In addition, in this case, the magnetic component and the magnetic core assembly are integrally formed to improve the convenience of component assembly. In addition, through the arrangement of the bobbin in this case, the secondary winding can be wound and arranged therein, so that the overall structure is more stable and the power density of the power supply is improved. And, in this case, the magnetic element is arranged in the winding frame to improve the convenience of assembly of the components.

This case can be modified by Shi Jiangsi, a person who is familiar with this technology, but all of them do not deviate from the protection of the scope of the patent application attached.

Claims (11)

1. A resonant transformer, comprising:

a magnetic core group including a magnetic column;

a primary winding disposed around the magnetic pole;

a secondary winding disposed around the primary winding; and

at least one magnetic part is arranged between the primary winding and the secondary winding so as to improve the leakage inductance between the primary winding and the secondary winding.

2. The resonant transformer of claim 1, wherein the magnetic member is a magnetic disk, and the magnetic disk is a removable magnetic disk or a floppy magnetic disk.

3. The resonant transformer of claim 1, wherein the magnetic core set comprises a first magnetic core and a second magnetic core, the first magnetic core comprises a first center pillar, the second magnetic core comprises a second center pillar, and the first center pillar and the second center pillar are assembled to form the magnetic pillar.

4. The resonant transformer of claim 3, wherein the magnetic member comprises at least two magnetic walls, at least one of the magnetic walls being integrally formed with the first magnetic core and at least one of the magnetic walls being integrally formed with the second magnetic core.

5. The resonant transformer of claim 1, wherein the magnetic member has at least one notch.

6. The resonant transformer of claim 1, further comprising a bobbin comprising an annular wall.

7. The resonant transformer according to claim 6, wherein the magnetic member is disposed between the annular wall of the bobbin and the primary winding.

8. The resonant transformer according to claim 6, wherein the magnetic member is disposed between the annular wall of the bobbin and the secondary winding.

9. The resonant transformer of claim 6, wherein the magnetic element is disposed within the annular wall of the bobbin.

10. The resonant transformer of claim 9, wherein the bobbin is integrally formed with the magnetic member.

11. The resonant transformer of claim 1, wherein the primary winding and the secondary winding are each fabricated from at least one conductive conductor of an air coil, a flat wire, a copper foil, or a triple insulated wire.

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