CN214705677U

CN214705677U - LLC double-slot transformer

Info

Publication number: CN214705677U
Application number: CN202120811568.7U
Authority: CN
Inventors: 邱明; 丁美林; 金宇星
Original assignee: Lumlux Corp
Current assignee: Lumlux Corp
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-11-12
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses a LLC double flute transformer belongs to electrical equipment technical field. The LLC double-slot transformer comprises a framework and an E-shaped magnetic core group, wherein the framework comprises a main body, the main body is of a flat tubular structure and is internally provided with a through hollow cavity, the main body comprises a first section and a second section which are connected, the length of the first section is smaller than that of the second section, a primary winding is wound on the first section, and a secondary winding is wound on the second section. The E-shaped magnetic core group can be inserted into the hollow cavity, the requirement of miniaturization is met under the condition that the height of the transformer is not increased, the ultrathin design is achieved, and the production cost is reduced; the installation space of the secondary winding is increased, the requirement of adapting to actual boosting is met, and the conversion efficiency of the transformer is improved.

Description

LLC double-slot transformer

Technical Field

The utility model relates to an electrical equipment technical field especially relates to a LLC double flute transformer.

Background

The topology of LLC circuit is usually adopted in the design scheme of high-power LED isolation power supply (1000W-1500W). At present, a resonant transformer aiming at an LLC topological circuit on the market usually adopts a design method of 2 transformers (primary side series connection and secondary side parallel connection), the design not only has great adverse effects on the cost and space of a power supply, but also the length proportion of the primary side and the secondary side of the transformer is the same, the transformer cannot adapt to the actual transformation requirement, the secondary side winding is easy to cause short length and narrow installation space, the requirement of actual boosting cannot be adapted, and the adverse consequences of low transformer conversion efficiency, resource waste and the like are caused.

Therefore, it is desirable to provide an LLC dual-tank transformer to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a LLC double flute transformer guarantees not improving under the condition of transformer height, and the installation space of increase secondary winding had both satisfied the actual requirement that steps up of adaptation, improved conversion efficiency, satisfied miniaturized requirement again, reached ultra-thin design, reduction in production cost.

In order to realize the purpose, the following technical scheme is provided:

an LLC double-slot transformer, comprising a bobbin and an E-shaped magnetic core group, the bobbin comprising:

the main body is of a flat tubular structure and is internally provided with a through hollow cavity, the main body comprises a first section and a second section which are connected, the length of the first section is less than that of the second section, a primary winding is wound on the first section, and a secondary winding is wound on the second section;

the E-shaped magnetic core group is configured to be inserted into the hollow cavity of the main body.

As an alternative to the LLC double-tank transformer, the skeleton further comprises a partition, which is annularly convexly provided on the outer wall of the main body and at the transition between the first section and the second section.

As an alternative to the LLC double-tank transformer, the bobbin further comprises a blocking assembly disposed on the main body, the blocking assembly comprising a first blocking member disposed at an end of the first section remote from the second section, and a second blocking member disposed at an end of the second section remote from the first section.

As an alternative of the LLC double-slot transformer, the LLC double-slot transformer further comprises a rubber shell, and the rubber shell is clamped on the second section.

As the alternative of LLC double flute transformer, it is provided with first joint limit to glue the shell, be provided with first locating part on the second section, first locating part with partition portion interval sets up, first locating part with partition portion forms first joint groove, first joint limit joint in the first joint inslot.

As the alternative of LLC double flute transformer, it is provided with the second joint limit to glue the shell, be provided with the second locating part on the second section, the second locating part with the second stops that the piece interval sets up, the second locating part with the second stops that the piece forms second joint groove, second joint limit joint in the second joint inslot.

As an alternative of the LLC double-groove transformer, a first base and a second base are respectively arranged at two ends of the main body, the first base is arranged at the bottom of the first section, and the second base is arranged at the bottom of the second section.

As an alternative of the LLC double-groove transformer, a wire outlet groove is concavely arranged at the bottom of the first base, and two first pin pins are arranged at the bottom of the wire outlet groove.

As an alternative of the LLC double-slot transformer, the bottom of the second base is sequentially provided with a limiting column and a second pin foot along the direction far away from the first base.

As an alternative to the LLC double-tank transformer, the bobbin has a length of 72mm, a width of 58mm and a height of 24.8 mm.

Compared with the prior art, the beneficial effects of the utility model are that:

the LLC double-slot transformer provided by the utility model has the advantages that the main body is in a flat tubular structure and is internally provided with a relatively through hollow cavity, the E-shaped magnetic core group can be inserted into the hollow cavity, the requirement of miniaturization is met under the condition of ensuring that the height of the transformer is not improved, the ultrathin design is achieved, and the production cost is reduced; the length of the first section is smaller than that of the second section, the primary winding is wound on the first section, and the secondary winding is wound on the second section, so that the mounting space of the secondary winding is increased, the requirement of actual boosting is met, and the conversion efficiency of the transformer is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic view of a first viewing angle of a framework in an embodiment of the present invention;

fig. 2 is a schematic view of a second perspective of the framework in an embodiment of the invention;

fig. 3 is a schematic view of a first viewing angle of a rubber case according to an embodiment of the present invention;

fig. 4 is a schematic view of a second viewing angle of the plastic shell according to the embodiment of the present invention.

Reference numerals:

1. a main body; 2. a partition portion; 4. a rubber shell;

11. a first stage; 12. a second stage; 121. a first limit piece; 122. a second limiting member; 13. a first clamping groove; 14. a second clamping groove; 15. a first base; 151. an outlet groove; 152. a first pin; 16. a second base; 161. a limiting column; 162. a second pin;

31. a first blocking member; 32. a second blocking member;

41. a first clamping edge; 42. and a second clamping edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In order to solve the design limitation of the high-power LED power supply on the LLC transformer, the design of a single double-slot transformer is very necessary. In order to ensure that the installation space of the secondary winding is increased without increasing the height of the transformer, the requirement of adapting to actual boosting is met, the conversion efficiency is improved, the requirement of miniaturization is met, the ultra-thin design is achieved, and the production cost is reduced, the embodiment provides the LLC double-slot transformer, and the specific content of the embodiment is described in detail below with reference to fig. 1 to 4.

As shown in fig. 1 and 2, the LLC double-slot transformer provided in this embodiment includes a skeleton and an E-shaped magnetic core set, the skeleton includes a main body 1, the main body 1 is in a flat tubular structure and is provided with a through hollow cavity therein, the main body 1 includes a first section 11 and a second section 12 which are connected, considering the requirement of the number of turns and the wire diameter of the primary and secondary sides, the length of the first section 11 is smaller than the length of the second section 12, the primary winding is wound around the first section 11, and the secondary winding is wound around the second section 12, so that the space between the primary and secondary sides is more reasonable. The E-shaped set of magnetic cores is configured to be inserted into the hollow cavity of the body 1, replacing the previous 2 transformers with a single double-slot transformer design. Specifically, the height of the skeleton design of this embodiment is less than 25mm, and the height of the magnetic core is less than 17 mm. In this embodiment, the E-shaped core is used in combination.

In short, the LLC double-slot transformer provided by the utility model, the main body 1 is in a flat tubular structure and is provided with a relatively through hollow cavity therein, the E-shaped magnetic core set can be inserted into the hollow cavity, which satisfies the miniaturization requirement, achieves the ultra-thin design and reduces the production cost without increasing the height of the transformer; the length of the first section 11 is smaller than that of the second section 12, the primary winding is wound on the first section 11, the secondary winding is wound on the second section 12, the installation space of the secondary winding is enlarged, the requirement of adapting to actual boosting is met, and the conversion efficiency of the transformer is improved.

Furthermore, the framework also comprises a separating part 2, and the separating part 2 is annularly and convexly arranged on the outer wall of the main body 1 and is positioned at the transition position between the first section 11 and the second section 12, so that the primary winding and the secondary winding are mutually separated, and the interference influence is reduced.

Further, the skeleton still includes setting up the subassembly that blocks on main part 1, blocks the subassembly and includes that first block 31 and second block 32, and first block 31 sets up in the one end that second section 12 is kept away from to first section 11, and second block 32 sets up in the one end that first section 11 is kept away from to second section 12. The primary winding and the secondary winding are prevented from falling off from the main body 1 due to the influence of external vibration by the blocking component.

Further, the LLC double-tank transformer further includes a rubber casing 4, and the rubber casing 4 is clamped to the second section 12. The rubber shell 4 is made of an insulating material, so that the creepage distance and the voltage resistance of the secondary side are solved; on the other hand, dust is prevented from falling into the secondary winding, the secondary winding is kept clean, heat dissipation is facilitated, and the conversion efficiency of the transformer is improved.

Further, the rubber shell 4 is provided with a first clamping edge 41, the second section 12 is provided with a first limiting part 121, the first limiting part 121 and the partition part 2 are arranged at an interval and form a first clamping groove 13, and the first clamping edge 41 is clamped in the first clamping groove 13, so that the rubber shell 4 is firmly clamped on the second section 12.

Further, the rubber shell 4 is provided with a second clamping edge 42, the second section 12 is provided with a second limiting part 122, the second limiting part 122 and the second blocking part 32 are arranged at intervals and form a second clamping groove 14, and the second clamping edge 42 is clamped in the second clamping groove 14, so that the clamping firmness between the rubber shell 4 and the second section 12 is further improved.

Further, a first base 15 and a second base 16 are respectively disposed at two ends of the main body 1, the first base 15 is disposed at the bottom of the first section 11, and the second base 16 is disposed at the bottom of the second section 12. Specifically, the framework is an integrally molded structure.

Usually, the primary winding and the secondary winding adopt a plurality of stranded wires, the coil is relatively large, further, the framework further comprises an outlet groove 151 and first pins 152, the outlet groove 151 is concavely arranged at the bottom of the first base 15, and two first pins 152 are arranged at the bottom of the outlet groove 151. Furthermore, the framework further comprises a limiting column 161 and a second pin 162, the limiting column 161 and the second pin 162 are sequentially arranged at the bottom of the second base 16 along the direction far away from the first base 15, and the outlet groove 151 and the limiting column 161 at the bottom of the framework are convenient for carding of multiple strands of windings, are also beneficial to the production process of the transformer, are not easy to tie and are more reasonable.

Specifically, outlet groove 151 is provided with four, and four outlet grooves 151 all set up in the bottom of first base 15, and spacing post 161 is provided with eight, and eight spacing posts 161 set up along the length direction interval of second base 16, and second pin foot 162 also is provided with eight, and second pin foot 162 sets up with spacing post 161 one-to-one.

Furthermore, design parameters of the 1000W-1500W transformer fully considered in size are estimated, the requirement on the number of turns and the wire diameter, the requirement on the size of the window area, the requirement on the height of the transformer are less than 25mm, the design requirement on the parameters of the original secondary side transformer and other factors are estimated, and finally the length of the framework is determined to be 72mm, the width is determined to be 58mm, and the height is determined to be 24.8 mm.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The LLC double-slot transformer comprises a framework and an E-shaped magnetic core group, and is characterized in that the framework comprises:

the winding device comprises a main body (1) which is of a flat tubular structure and is internally provided with a through hollow cavity, wherein the main body (1) comprises a first section (11) and a second section (12) which are connected, the length of the first section (11) is smaller than that of the second section (12), a primary winding is wound on the first section (11), and a secondary winding is wound on the second section (12);

the E-shaped magnetic core group is configured to be inserted into a hollow cavity of the main body (1).

2. LLC double-slot transformer according to claim 1, wherein said bobbin further comprises a partition (2), said partition (2) being annularly convex on the outer wall of said body (1) and located at the transition between said first section (11) and said second section (12).

3. LLC double-slot transformer according to claim 2, wherein the bobbin further comprises a blocking assembly arranged on the body (1), the blocking assembly comprising a first blocking member (31) and a second blocking member (32), the first blocking member (31) being arranged at an end of the first section (11) remote from the second section (12), the second blocking member (32) being arranged at an end of the second section (12) remote from the first section (11).

4. The LLC double-tank transformer according to claim 3, further comprising a rubber shell (4), said rubber shell (4) being snapped onto said second section (12).

5. The LLC double-slot transformer according to claim 4, wherein said rubber housing (4) is provided with a first clamping edge (41), said second segment (12) is provided with a first limiting member (121), said first limiting member (121) and said partition portion (2) are arranged at an interval, said first limiting member (121) and said partition portion (2) form a first clamping slot (13), and said first clamping edge (41) is clamped in said first clamping slot (13).

6. The LLC double-slot transformer according to claim 5, wherein said rubber housing (4) is provided with a second clamping edge (42), said second segment (12) is provided with a second limiting member (122), said second limiting member (122) and said second blocking member (32) are arranged at an interval, said second limiting member (122) and said second blocking member (32) form a second clamping slot (14), and said second clamping edge (42) is clamped in said second clamping slot (14).

7. LLC double-tank transformer according to any of claims 1-6, wherein said body (1) is provided at both ends with a first pedestal (15) and a second pedestal (16), respectively, said first pedestal (15) being provided at the bottom of said first section (11) and said second pedestal (16) being provided at the bottom of said second section (12).

8. LLC double-tank transformer according to claim 7, wherein the bottom of said first base (15) is recessed with an outlet tank (151), the tank bottom of said outlet tank (151) being provided with two first pin legs (152).

9. The LLC double-slot transformer according to claim 8, wherein the bottom of said second pedestal (16) is provided with a limit post (161) and a second pin (162) in sequence along a direction away from said first pedestal (15).

10. The LLC double-slot transformer of claim 9, wherein said bobbin has a length of 72mm, a width of 58mm, and a height of 24.8 mm.