CN217157919U

CN217157919U - Resonance transformer

Info

Publication number: CN217157919U
Application number: CN202220619140.7U
Authority: CN
Inventors: 张少壮
Original assignee: MEAN WELL ENTERPRISES CO LTD; MEAN WELL (GUANGZHOU) ELECTRONICS CO Ltd
Current assignee: MEAN WELL ENTERPRISES CO LTD; MEAN WELL (GUANGZHOU) ELECTRONICS CO Ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-08-09
Anticipated expiration: 2032-03-21

Abstract

The utility model discloses an adopt a resonance transformer of vertical structural design in order to reduce eddy current loss. Particularly, the utility model discloses to adopt two formula structural design with the slotted bobbin of winding coil to do benefit to modularized design and equipment. The utility model discloses resonance transformer mainly includes: the transformer comprises a first iron core, a second iron core, a first winding frame, a second winding frame, a first terminal seat and a second terminal seat, wherein a secondary winding is wound on the first winding frame (for short, a sub sleeve), and a primary winding is wound on the second winding frame (for short, a main sleeve). Further, the utility model discloses still design and establish a cover body of this female cover for the cover to utilize this cover body to keep apart the secondary winding on primary winding on the female cover and the son cover. According to the design, the resonance transformer of the utility model allows to replace the corresponding sub-sleeve to meet different application requirements (such as large current output or small current output).

Description

Resonance transformer

Technical Field

The present invention relates to the field of power electronics, and more particularly to a resonant transformer used in a power conversion device.

Background

As electronic products evolve and develop, different electronic products need to be driven by different voltages; therefore, manufacturers of power supply apparatuses are actively trying to develop various suitable transformers to be applied within the corresponding power supply apparatuses. Currently, there are two types of resonant transformers with primary and leakage inductances. The first type uses the main transformer combined with the resonant inductor to generate and adjust the leakage inductance, but this option requires two components, i.e. the main transformer and the resonant inductor, which requires a large space and is not favorable for miniaturization design. The second type is a split-slot transformer having two windings to generate a main magnetic induction path and a leakage induction path, respectively, the two windings being spaced apart from each other and the number of turns of the windings being adjusted to control the leakage inductance value.

Therefore, the split-tank transformer becomes the mainstream of the resonant transformer. In the prior art, the resonant transformer is designed to have a vertical structure, and the primary lead pin and the secondary lead pin are respectively arranged on two sides of the slot-type bobbin. However, with the thinning of the vertical type resonance transformer (i.e., the reduction of the height), it is necessary to use a Triple Insulated wire (Triple Insulated wire) as a coil wound on the slot-type bobbin to form the primary winding and the secondary winding, resulting in an increase in the manufacturing cost of the resonance transformer. Furthermore, the conventional slot-type bobbin has a fixed size and cannot be adaptively adjusted and changed according to application requirements, so that the conventional resonant transformer can only be applied to power conversion devices of a specific type.

As can be seen from the foregoing description, there is still a need for improvement in the structural design of the conventional vertical resonant transformer. In view of this, the inventor of the present invention has made the best research and development, and finally, has developed a resonant transformer of the present invention.

SUMMERY OF THE UTILITY MODEL

The utility model discloses main aim at provides an adopt vertical structural design in order to reduce the resonance transformer of eddy current loss. Particularly, the utility model discloses to adopt two formula structural design with the slotted bobbin of winding coil to do benefit to modularized design and equipment. The utility model discloses resonance transformer mainly includes: the transformer comprises a first iron core, a second iron core, a first winding frame, a second winding frame, a first terminal seat and a second terminal seat, wherein a secondary winding is wound on the first winding frame (for short, a sub sleeve), and a primary winding is wound on the second winding frame (for short, a main sleeve). Further, the utility model discloses still design and establish a cover body of this female cover for the cover to utilize this cover body to keep apart the secondary winding on primary winding on the female cover and the son cover. According to the design, the resonance transformer of the utility model allows to replace the corresponding sub-sleeve to meet different application requirements (such as large current output or small current output).

To achieve the above object, the present invention provides an embodiment of the resonant transformer, which includes:

a first iron core;

the first winding frame is provided with a first pipe fitting, a first plate connected with one end of the first pipe fitting and a second plate connected with the other end of the first pipe fitting, wherein a secondary winding is wound on the first pipe fitting, and the first plate is arranged on the first iron core;

a first terminal seat formed on one side of the first plate and provided with a plurality of first terminals;

the second bobbin is arranged on the first bobbin and is provided with a second pipe fitting, a third plate connected with one end of the second pipe fitting and a fourth plate connected with the other end of the second pipe fitting, wherein a primary winding is wound on the second pipe fitting;

the second terminal seat is formed on one side of the third plate and provided with a plurality of second terminals;

the supporting structure comprises a left supporting piece and a right supporting piece, wherein the left supporting piece and the right supporting piece are arranged along two sides of the third plate, and one end of the left supporting piece and one end of the right supporting piece are connected with the second terminal seat;

a cover body, which is sleeved on the second winding frame so as to partially cover the third plate and the fourth plate and is supported by the supporting structure; and

and the second iron core is arranged on the fourth plate.

In one embodiment, the second terminal is a linear terminal, and the first terminal is any one selected from the group consisting of a linear terminal and an L-shaped terminal.

In one embodiment, the first core is an E-shaped core, the first tube has a first hollow portion, the first plate has a first opening communicating with the first hollow portion, the second plate has a second opening communicating with the first hollow portion, and the first middle portion of the first core penetrates into the first hollow portion through the first opening.

In one embodiment, the second core is also an E-shaped core, the second tube has a second hollow portion, the third plate has a third opening communicating with the second hollow portion, the fourth plate has a fourth opening communicating with the second hollow portion, and the second hollow portion of the second core penetrates into the second hollow portion through the fourth opening.

In one embodiment, a left gap is formed between the left supporting member and the left side of the third plate, a right gap is formed between the right supporting member and the right side of the third plate, and the third plate is overlapped on the second plate through the left supporting member and the right supporting member, so that the first hollow portion of the second tube is coaxial with the second hollow portion of the first tube.

In one embodiment, a bottom surface of the third plate is provided with a mounting region for a magnetic member to be mounted therein, and the magnetic member is used for adjusting leakage inductance of the resonant transformer.

In one embodiment, the cover is a U-shaped cover surrounded by a U-shaped middle plate, a U-shaped upper plate and a U-shaped lower plate.

In one embodiment, the left portion of the U-shaped lower plate is partially embedded in the left gap, the right portion of the U-shaped lower plate is partially embedded in the right gap, and the lower surface of the U-shaped upper plate faces the upper surface of the fourth plate when connected to the second bobbin.

In one embodiment, two first position-limiting members are disposed on the lower surface of the first plate, and a position-limiting space is disposed between the two first position-limiting members, so that the first iron core is positioned in the position-limiting space.

In an embodiment, two second position-limiting members are disposed on the upper surface of the fourth plate, and a position-limiting space is also disposed between the two second position-limiting members, so that the second iron core is positioned in the position-limiting space.

Drawings

Fig. 1 is a first perspective view of a resonant transformer of the present invention;

fig. 2 is a second perspective view of the resonance transformer of the present invention;

fig. 3 is a first exploded perspective view of the resonant transformer of the present invention;

fig. 4 is a second exploded perspective view of the resonant transformer of the present invention;

fig. 5 is a perspective view of the first bobbin, the first terminal seat, the second bobbin, the second terminal seat, and the supporting structure of the resonant transformer of the present invention; and

fig. 6 is a cross-sectional view of the resonant transformer of the present invention.

Description of reference numerals:

1: resonant transformer

11 first iron core

11C first intermediate part

12: first bobbin

121: a first pipe member

122 first plate

1221 first opening

122L first limiting piece

123 second plate member

1231 second opening

13 first terminal holder

131 first terminal

14: second bobbin

141 second pipe fitting

142 third sheet member

1421 third opening

142R a setting region

143 fourth plate member

1431 the fourth opening

143L second limiting piece

15 second terminal holder

151 second terminal

16 support structure

17: cover body

17B U-shaped middle plate

17U is a U-shaped upper plate

17L U-shaped lower plate

18 second iron core

18C second intermediate portion

19 magnetic member

Detailed Description

In order to more clearly describe the resonant transformer of the present invention, the following description will be made in detail with reference to the drawings.

Fig. 1 and fig. 2 are first and second perspective views of a resonant transformer according to the present invention. Fig. 3 and 4 are first and second exploded perspective views of the resonant transformer of the present invention. As shown in fig. 1-4, the utility model provides an adopt vertical structural design's resonance transformer 1, it mainly includes: a first core 11, a first bobbin 12, a first terminal holder 13, a second bobbin 14, a second terminal holder 15, a support structure 16, a cover 17, and a second core 18. According to the design of the present invention, the first bobbin 12 (may be called as a sub-sleeve for short) has a first tube 121, a first plate 122 connected to one end of the first tube 121, and a second plate 123 connected to the other end of the first tube 121. As shown in fig. 3 and 4, the first bobbin 12 is disposed on the first core 11 by the first plate 122. Moreover, a Secondary winding (Secondary winding) is wound on the first tube 121, and the first terminal seat 13 is formed on one side of the first plate 122 and has a plurality of first terminals 131. The first terminals 131 may be linear terminals or L-shaped terminals, depending on the application. In more detail, the first terminal 131 is designed in a straight line for 12V output, and the first terminal 131 is designed in an L shape for 24V output.

Further, fig. 5 shows a perspective view of the first bobbin 12, the first terminal holder 13, the second bobbin 14, the second terminal holder 15, and the support structure 16. Fig. 6 is a cross-sectional view of the resonant transformer 1 of the present invention. As shown in fig. 3 to 6, the first core 11 is an E-shaped core, the first tube 121 has a first hollow portion, the first plate 122 has a first opening 1221 communicating with the first hollow portion, the second plate 123 has a second opening 1231 communicating with the first hollow portion, and the first middle portion 11C of the first core 11 penetrates into the first hollow portion through the first opening 1221.

More specifically, the second bobbin 14 (which may be simply referred to as a female sleeve) is disposed on the first bobbin 12, and has a second tube 141, a third plate 142 connected to one end of the second tube 141, and a fourth plate 143 connected to the other end of the second tube 141. A Primary winding (Primary winding) is wound on the second tube 141, and the second terminal holder 15 is formed on one side of the third plate 142 and has a plurality of second terminals 151, where the second terminals 151 are linear terminals. It is noted that the second core 18 is disposed on the fourth plate 143. As shown in fig. 3, 4 and 6, the second core 18 is also an E-shaped core, the second tube 141 has a second hollow portion, the third plate 142 has a third opening 1421 communicating with the second hollow portion, the fourth plate 143 has a fourth opening 1431 communicating with the second hollow portion, and the second middle portion 18C of the second core 18 penetrates into the second hollow portion through the fourth opening 1431.

In particular, the present invention relates to a support structure 16 comprising a left support and a right support. As shown in fig. 3, 4 and 5, the left and right supporting members are disposed along two sides of the third plate 142, and are connected to the second terminal holder 15 at one end thereof. Moreover, a left gap is formed between the left supporting member and the left side of the third plate 142, a right gap is formed between the right supporting member and the right side of the third plate 142, and the third plate 142 is overlapped on the second plate 123 through the left supporting member and the right supporting member, so that the first hollow portion of the second pipe 141 is coaxial with the second hollow portion of the first pipe 121. With this design, the second plate 123 is also retained between the left and right supports of the supporting structure 16.

Further, the present invention is also designed to cover the cover 17 of the female sleeve (i.e. the second bobbin 14) to isolate the primary winding wound on the second tube 141 of the second bobbin 14 and the secondary winding wound on the first tube 121 of the first bobbin 12 by using the cover 17. As shown in fig. 3 to 6, the cover 17 covering the second bobbin 14 partially covers the third plate 142 and the fourth plate 143 and is supported by the supporting structure 16. In one embodiment, the enclosure 17 is a U-shaped enclosure 17 defined by a U-shaped middle panel 17B, U, an upper U-shaped panel 17U, and a lower U-shaped panel 17L. So designed, when connected to the second bobbin 14 (i.e., the female housing), the left portion of the U-shaped lower plate 17L is partially fitted into the left gap, the right portion of the U-shaped lower plate 17L is partially fitted into the right gap, and the U-shaped upper plate 17U faces the upper surface of the fourth plate 143 with its lower surface.

It should be noted that, as shown in fig. 3 and fig. 4, two first limiting members 122L are disposed on the lower surface of the first plate 122, and a limiting space is disposed between the two first limiting members 122L, so that the first iron core 11 is limited in the limiting space. On the other hand, the upper surface of the fourth plate 143 is provided with two second limiting members 143L, and a limiting space is also provided between the two second limiting members 143L, so that the second iron core 18 is limited in the limiting space. In addition, in order to make the resonance transformer 1 have a function of adjusting the magnetic flux leakage (Lm), the present invention further provides a setting region 142R on the bottom surface of the third plate 142 of the second bobbin 14 (i.e., the female housing). In the case where there is a need to increase the leakage flux, a magnetic member 19 may be disposed in the disposition region 142R, thereby improving the leakage inductance of the resonance transformer 1. For example, when the utility model discloses resonant transformer 1 uses among the LLC power conversion equipment of miniwatt, can make through addding this magnetic part 19 the utility model discloses resonant transformer 1's leakage inductance promotes doubly. On the other hand, when the resonant transformer 1 of the present invention is applied in the LLC power conversion apparatus with relatively high power, the magnetic member 19 is not needed.

Thus, the above description has been made in a complete and clear manner for a resonant transformer of the present invention; moreover, it can be seen from the above that the present invention has the following advantages:

(1) the utility model discloses general vertical structural design is adopted in order to reduce the eddy current loss to resonant transformer 1. And, the utility model discloses the two formula designs of female cover + son cover are adopted to the branch slot type bobbin that will be used for the winding coil to do benefit to modularized design and equipment. According to the design, the resonance transformer 1 of the present invention allows to replace the corresponding sub-sleeve to meet different application requirements (such as large current output or small current output).

(2) The utility model discloses still design and establish the cover body 17 of this female cover for the cover to utilize this cover body 17 to keep apart the secondary winding on primary winding on the female cover and the son cover, satisfy the requirement of law to the distance. By adopting the design, the primary winding and the secondary winding are respectively wound on the female sleeve and the sub sleeve by using a common enameled wire, and a Triple Insulated wire (Triple Insulated wire) with high cost is not required.

It should be emphasized, however, that the above detailed description is specific to possible embodiments of the invention, but this is not to be taken as limiting the scope of the invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the invention are intended to be included within the scope of the invention.

Claims

1. A resonant transformer, comprising:

a first iron core;

and the second iron core is arranged on the fourth plate.

2. The resonant transformer of claim 1, wherein the second terminal is a linear terminal and the first terminal is any one selected from the group consisting of a linear terminal and an L-shaped terminal.

3. The resonant transformer of claim 1, wherein the first core is an E-shaped core, the first tube has a first hollow portion, the first plate has a first opening communicating with the first hollow portion, the second plate has a second opening communicating with the first hollow portion, and the first middle portion of the first core penetrates into the first hollow portion through the first opening.

4. The resonant transformer of claim 3, wherein the second core is also an E-shaped core, the second tube has a second hollow portion, the third plate has a third opening communicating with the second hollow portion, the fourth plate has a fourth opening communicating with the second hollow portion, and the second middle portion of the second core penetrates into the second hollow portion through the fourth opening.

5. The resonant transformer of claim 4, wherein a left gap is formed between the left supporting member and a left side of the third plate, a right gap is formed between the right supporting member and a right side of the third plate, and the third plate is stacked on the second plate through the left supporting member and the right supporting member, such that the first hollow portion of the second tube is coaxial with the second hollow portion of the first tube.

6. The resonant transformer of claim 5, wherein the bottom surface of the third plate has a mounting region for a magnetic member to be mounted therein, and the magnetic member is used to adjust the leakage inductance of the resonant transformer.

7. The resonant transformer according to claim 5, wherein the enclosure is a U-shaped enclosure defined by a U-shaped middle plate, a U-shaped upper plate and a U-shaped lower plate.

8. The resonance transformer according to claim 7, wherein a left portion of the U-shaped lower plate is partially fitted into the left gap, a right portion of the U-shaped lower plate is partially fitted into the right gap, and the U-shaped upper plate faces an upper surface of the fourth plate with a lower surface thereof while being connected to the second bobbin.

9. The resonant transformer according to claim 4, wherein two first position-limiting members are disposed on a lower surface of the first plate, and a position-limiting space is disposed between the two first position-limiting members, such that the first core is positioned in the position-limiting space.

10. The resonant transformer according to claim 9, wherein two second position-limiting members are disposed on the upper surface of the fourth plate, and a position-limiting space is disposed between the two second position-limiting members, such that the second iron core is limited in the position-limiting space.