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

Resonance transformer

Technical Field

The present disclosure relates to transformers, and more particularly, to a resonant transformer.

Background

The transformer is a magnetic component frequently used in various electrical equipment, and adjusts different voltages by using the principle of conversion and induction of electric energy and magnetic energy, so that the applicable range of the electrical equipment is achieved. In a power supply system of an electronic product such as a liquid crystal television, a transformer is mainly a transformer having a leakage inductance, for example: a resonant transformer (LLC transformer) to reduce switching losses and reduce noise.

Generally speaking, in the conventional resonant transformer structure, a resonant inductor is added outside a main transformer, so as to meet the requirements of main inductance and leakage inductance on a circuit. However, the external resonant inductor of the main transformer makes the overall structure volume larger, and the external resonant inductor will occupy part of the plate structure of the main transformer, which not only reduces the power density, but also makes the assembly process more complicated.

In another conventional resonant transformer structure, the primary winding and the secondary winding of the main transformer are separated by slots, so as to meet the requirements of main inductance and leakage inductance on the circuit. However, the arrangement of the sub-slots will increase the overall volume of the transformer, and the requirement of reducing the volume cannot be met, which is difficult to meet the development trend of miniaturization. The power density of the existing resonant transformer is difficult to increase due to the overlarge volume of the transformer.

In view of the above, there is a need to develop an improved resonant transformer to solve the problems of the prior art.

SUMMERY OF THE UTILITY MODEL

The main purpose of the scheme is to provide a resonant transformer, so as to solve the defects of overlarge volume, low power density, complex assembly process and the like of the conventional resonant transformer.

Another objective of the present disclosure is to provide a resonant transformer, in which a magnetic element is disposed between a secondary winding and a primary winding, so as to achieve the effects of increasing power density and miniaturizing volume of a power supply without additionally providing a resonant inductor assembly.

Another objective of the present invention is to provide a resonant transformer, wherein the magnetic member and the magnetic core set are integrally formed, so as to improve the assembly convenience. In addition, the resonant transformer can be wound with the secondary winding through the arrangement of the winding frame, so that the whole structure is more stable, and the power density of the power supply is effectively improved. In addition, the magnetic part is arranged in the winding frame, so that the assembly convenience can be further improved.

To achieve the above objective, one of the broader aspects of the present invention is to provide a resonant transformer, which includes a magnetic core set, a primary winding, a secondary winding and at least one magnetic element. The magnetic core group comprises magnetic columns. The primary winding is disposed around the magnetic 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.

In one embodiment, the magnetic member is a magnetic disk, and the magnetic disk is a removable 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 pillar, the second magnetic core includes a second center pillar, and the first center pillar and the second center pillar are assembled to form the magnetic pillar.

In an embodiment, the magnetic member 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 member has at least one notch.

In one embodiment, the apparatus further comprises a bobbin comprising an annular wall.

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

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

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

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

In one embodiment, 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.

Drawings

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

Fig. 1B is an exploded schematic view 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 disclosure.

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

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

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

Fig. 3B is an exploded schematic diagram of the resonant transformer shown in fig. 3A.

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

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

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

Wherein the reference numbers:

1. 1a, 1b, 1c, 1 d: resonance transformer

2: magnetic core group

20: magnetic pole

21: first magnetic core

210: first side column

211: first center pillar

22: second magnetic core

220: second side column

221: second center pillar

23: first air gap

24: second air gap

3: primary winding

4: secondary winding

5. 6: magnetic member

51: first magnetic disk

52: second magnetic disk

53: gap

61: first magnetic wall

62: second magnetic wall

63: third magnetic wall

64: fourth magnetic wall

7: winding frame

71: annular wall

72: hollow part

73: pin

74: first baffle plate

75: second baffle

Detailed Description

Exemplary embodiments that embody features and advantages of this disclosure are described in detail below in the detailed description. It will be understood that the present disclosure is capable of various modifications without departing from the scope of the disclosure, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.

Referring to fig. 1A to 1C, fig. 1A is a schematic structural diagram of a resonant transformer according to an embodiment of the present disclosure, fig. 1B is an exploded structural diagram of the resonant transformer shown in fig. 1A, and fig. 1C is a schematic cross-sectional diagram of the resonant transformer according to the embodiment of the present disclosure. The resonant transformer 1 of one embodiment of the present disclosure includes a magnetic core assembly 2, a primary winding 3, a secondary winding 4, and at least one magnetic member 5. The magnetic core group 2 comprises magnetic columns 20. The primary winding 3 is arranged around the pole 20. The secondary winding 4 is disposed around the primary winding 3. At least one magnetic member 5 is disposed between the primary winding 3 and the secondary winding 4 to improve leakage inductance between the primary winding 3 and the secondary winding 4. Therefore, the resonant transformer 1 of the present embodiment does not need to additionally add a resonant inductor component, so that the overall power density of the resonant transformer is increased, and not only the leakage inductance with the required strength is achieved, but also the effect of miniaturization of the volume is achieved.

In an embodiment of the present invention, the core set 2 may be, but is not limited to, an EE-type core set having a first core 21 and a second core 22 symmetrically disposed with respect to each other. The first core 21 includes two first side legs 210 and a first center leg 211. The two first side legs 210 are respectively located at both ends of one side surface of the first magnetic core 21, and the first center leg 211 is located between the two first side legs 210. The second core 22 includes two second side legs 220 and a second center leg 221. The two second side legs 220 are respectively located at both ends of one side surface of the second magnetic core 22, and the second center leg 221 is located between the two second side legs 220. The first magnetic core 21 and the second magnetic core 22 are mutually jointed, so that the two first side columns 210 are correspondingly assembled with the two second side columns 220 respectively, and the two first air gaps 23 are formed between the two first side columns 210 and the two second side columns 220 respectively; the first pillar 211 and the second pillar 221 are correspondingly assembled to form the magnetic pillar 20, and the second air gap 24 is formed between the first pillar 211 and the second pillar 221. In this embodiment, the first center pillar 211 and the second center pillar 221 are ground such that the first center pillar 211 and the second center pillar 221 are lower than the contact surfaces of the two outer first side pillars 210 and the second side pillar 220, respectively, and the first air gap 23 and the second air gap 24 have the required widths, thereby achieving the main and leakage senses with the required strength. The first side column 210 and the first center column 211 and the second side column 220 and the second center column 221 can be, but are not limited to, connected by gluing. The structure of the magnetic core assembly 2 is not limited to the above embodiment, but it may also be an EI type magnetic core assembly, and may be changed arbitrarily according to actual requirements.

In this embodiment, the primary winding 3 is disposed around the magnetic pillar 20 of the magnetic core assembly 2, the secondary winding 4 is disposed around the outer side of the primary winding 3, and the magnetic member 5 is disposed between the primary winding 3 and the secondary winding 4, so that the magnetic coupling between the primary winding 3 and the secondary winding 4 is reduced, thereby achieving the leakage inductance with the required strength. The primary winding 3 and the secondary winding 4 are each made of at least one conductive conductor of 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 the present 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 member 5 can be, but is not limited to, one or more magnetic discs, wherein the magnetic discs can be floppy discs or removable discs, and the removable discs are detachably disposed between the primary winding 3 and the secondary winding 4. In addition, the magnetic permeability (μ) of the magnetic disk can be adjusted according to the requirement, so that the magnetic coupling between the primary winding 3 and the secondary winding 4 is adjusted to the required strength, and the leakage inductance with the required strength is achieved.

Please refer to fig. 1B again. As shown in fig. 1B, the magnetic member 5 includes a first magnetic disk 51 and a second magnetic disk 52. When the first magnetic disc 51 and the second magnetic disc 52 are disposed between the primary winding 3 and the secondary winding 4, the first magnetic disc 51 and the second magnetic disc 52 do not contact each other, and two notches 53 are formed for the primary winding 3 to be led out. In other embodiments, the number of the notches 53 of the magnetic member 5 is not limited to two as shown in fig. 1B, but may be one or more than three, which may be varied according to actual requirements.

Please refer to fig. 2A to 2B, wherein fig. 2A is an exploded structural diagram of a resonant transformer according to an embodiment of the present disclosure, and fig. 2B is a cross-sectional diagram of the resonant transformer according to the embodiment of the present disclosure. The resonant transformer 1A of the present embodiment has a structure similar to that of the resonant transformer 1 shown in fig. 1A to 1C, wherein the same reference numerals denote the same components and functions, and thus, the description thereof is omitted. In this embodiment, the magnetic member 6 of the resonant transformer 1a is integrally formed with the core set 2, and the magnetic member 6 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 embodiment, the magnetic core assembly 2 is also illustrated by taking an EE type magnetic core assembly as an example, the structure thereof is also similar to that of the foregoing embodiment, and the same symbols represent the same components and functions. In this embodiment, the magnetic member 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 center pillar 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 a side surface of the second core 22 and surround the second center pillar 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 core 21 and the second core 22 are coupled to each other, the two first side legs 210 are correspondingly assembled with the two second side legs 220, and the first center legs 211 are correspondingly assembled with the second center legs 221 to form the magnetic legs 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 element 6. After the first core 21 and the second core 22 are bonded to each other, both ends of the first magnetic wall 61 and the third magnetic wall 63 are not in contact with both ends of the second magnetic wall 62 and the fourth magnetic wall 64, respectively, so that two notches (not shown) are formed. In this way, the primary winding 3 can be led out through two gaps, but not limited thereto, and the number and arrangement of the gaps can be arbitrarily changed according to actual situations. The first magnetic wall 61, the second magnetic wall 62 and the first magnetic core 21 of the magnetic member 6 are integrally formed, and the third magnetic wall 63, the fourth magnetic wall 64 and the second magnetic core 22 are integrally formed, so that leakage inductance with required strength is achieved, and convenience in assembly is improved.

Referring to fig. 3A to 3C, fig. 3A is a schematic structural diagram of a resonant transformer according to an embodiment of the present disclosure, fig. 3B is an exploded structural diagram of the resonant transformer shown in fig. 3A, and fig. 3C is a schematic cross-sectional diagram of the resonant transformer according to the embodiment of the present disclosure. The resonant transformer 1b of this embodiment has a structure similar to that of the resonant transformer 1 shown in fig. 1A to 1C, wherein the same reference numerals denote the same components and functions, and thus, the description thereof is omitted. In this embodiment, the resonant transformer 1b further includes a bobbin 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 74 and the second baffle 75 are provided at both ends of the annular wall 71, respectively. The hollow portion 72 is defined in a hollow area surrounded by the annular wall 71, and the hollow portion 72 penetrates the first baffle 74 and the second baffle 75. The plurality of pins 73 are disposed at one side of the second barrier 75. The secondary winding 4 is arranged around an annular wall 71 of the bobbin 7. The magnetic member 5 is disposed in the hollow portion 72 and between the annular wall 71 of the bobbin 7 and the primary winding 3, thereby achieving a leakage inductance of a desired strength. Through the arrangement of the bobbin 7, the secondary winding 4 can be wound therein, so that the overall structure of the resonance transformer 1b is more stable, and the power density of the power supply is further improved.

Referring to fig. 4, fig. 4 is a schematic cross-sectional view of a resonant transformer according to an embodiment of the present disclosure. The resonant transformer 1C of this embodiment has a similar structure to the resonant transformer 1b shown in fig. 3C, wherein the same reference numerals denote the same components and functions, and thus, the description thereof is omitted. In this embodiment, the magnetic member 5 of the resonant transformer 1c is disposed around the annular wall 71 of the bobbin 7 and between the annular wall 71 of the bobbin 7 and the secondary winding 4, thereby improving the leakage inductance between the primary winding 3 and the secondary winding 4.

Referring to fig. 5, fig. 5 is a schematic cross-sectional view of a resonant transformer according to an embodiment of the present disclosure. The resonant transformer 1d of this embodiment has a similar structure to the resonant transformer 1b shown in fig. 3C, wherein the same reference numerals denote the same components and functions, and thus the description thereof is omitted. In this embodiment, the magnetic member 5 of the resonant transformer 1d 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 part 72, the secondary winding 4 is arranged around the annular wall 71, and the magnetic part 5 is arranged between the primary winding 3 and the secondary winding 4, so that the leakage inductance between the primary winding 3 and the secondary winding 4 is improved, the assembly complexity is reduced, and the assembly convenience is improved. In some embodiments, the magnetic member 5 is integrally formed with the bobbin 7. In some embodiments, the magnetic member 5 is integrally formed in the annular wall 71 of the bobbin 7 by injection molding, but not limited thereto.

In summary, the resonant transformer disclosed in the present application is provided with the magnetic element disposed between the secondary winding and the primary winding, and thus the resonant inductor assembly does not need to be additionally disposed, thereby achieving the effects of increasing the power density of the power supply and miniaturizing the volume. In addition, the magnetic part and the magnetic core group are integrally formed, so that the assembly convenience is improved. In addition, the secondary winding can be wound in the bobbin through the arrangement of the bobbin, so that the whole structure is more stable, and the power density of the power supply is improved. And, the present case sets up in the bobbin through the magnetic part to improve the convenience of subassembly equipment.

Various modifications may be made by those skilled in the art without departing from the scope of the invention as defined by the appended claims.

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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