CN210805469U

CN210805469U - Integrated inductance transformer

Info

Publication number: CN210805469U
Application number: CN201922341247.0U
Authority: CN
Inventors: 张立品; 张礼扬; 樊勤先; 覃浪合
Original assignee: SHENZHEN JINGQUANHUA ELECTRONICS CO LTD
Current assignee: SHENZHEN JINGQUANHUA ELECTRONICS CO LTD
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-06-19
Anticipated expiration: 2029-12-23

Abstract

The utility model relates to an integrated inductance transformer, it includes: base, set up in main transformer on the base, set up in just be located on the base inductor and the direct current transformer at main transformer both ends, main transformer includes main transformer skeleton, cartridge in two main transformer magnetic cores at main transformer skeleton both ends and around locating main transformer winding on the main transformer skeleton direct current transformer leans on respectively main transformer skeleton both ends, and be located two direct current transformer windings in the main transformer winding outside, every direct current transformer winding with the base is fixed, direct current transformer with two are shared to the main transformer magnetic core, main transformer skeleton includes first bearing part and connect in the first portion of leaning on of the relative both ends of first bearing part leans on the portion, first portion of leaning on is the V type structure.

Description

Integrated inductance transformer

Technical Field

The utility model relates to a power technical field especially relates to an integrated inductance transformer.

Background

This section is intended to provide a background or context to the particular embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

The transformer generates a large current and a high voltage by using the principle of series resonance or parallel resonance. Typically for large capacitive or inductive loads. By utilizing the parallel resonance of the load and the equipment, larger load current can be obtained by using smaller exciting current; the use of series resonance of the load and the device allows to achieve a high voltage on the load with a lower excitation voltage.

The transformer is one of indispensable elements in the design of the switching power supply, and is also an important component of the switching power supply. With the rapid development of electronic power technology, high-frequency switching power supplies have been widely used in many fields such as computers, communications, railways, and the like, and have achieved significant economic benefits. With the development of rail transit and new energy industries, the requirements on the installation and use environment of the reactor are higher and higher, and the reactor is required to be compact in structure, high in reliability, high in power density, low in cost and easy to install. However, in the prior art, when the main transformer and the dc transformer share a magnetic circuit, the generated heat is not easy to dissipate, and the quality of the transformer is affected by the heat accumulation.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides an integrated inductive transformer capable of solving the above technical problems.

An integrated inductive transformer, comprising: base, set up in main transformer on the base, set up in just be located on the base inductor and the direct current transformer at main transformer both ends, main transformer includes main transformer skeleton, cartridge in two main transformer magnetic cores at main transformer skeleton both ends and around locating main transformer winding on the main transformer skeleton, direct current transformer leans on respectively main transformer skeleton both ends, and be located two direct current transformer windings in the main transformer winding outside, every direct current transformer winding with the base is fixed, direct current transformer with two are shared to the main transformer magnetic core, main transformer skeleton includes first bearing part and connect in the first portion of leaning on of the relative both ends of first bearing part leans on the portion, first portion of leaning on is the V type.

Preferably, the main transformer framework is provided with a plurality of heat dissipation holes, the heat dissipation holes are uniformly and alternately arranged on the first bearing portion, the main transformer framework further comprises a containing cavity penetrating through two opposite ends of the main transformer framework, the heat dissipation holes are communicated with the containing cavity, one end of the main transformer magnetic core is inserted and contained in the containing cavity of the first bearing portion, and the main transformer winding is sleeved on the outer wall of the first bearing portion.

Preferably, each first abutting portion comprises two first V-shaped portions which are arranged oppositely and a first extending portion which connects the two first V-shaped portions, and a first flange which extends in a direction away from the first V-shaped portion at the other end is further formed on the edge of each first V-shaped portion.

Preferably, the main transformer magnetic core comprises a core portion and connecting portions symmetrically connected to two ends of the core portion, each connecting portion comprises a bottom portion vertically connected to the core portion and a side portion vertically connected to the other end portion of the bottom portion, and the extending direction of the side portion is the same as the extending direction of the core portion.

Preferably, the main transformer winding is wound on the first bearing portion, the main transformer winding includes a first coil and a second coil, the first coil and the second coil are respectively surrounded by a metal cable to form a hollow cylinder structure, the diameter of the second coil is smaller than that of the first coil, and the first coil and the second coil are coaxially arranged such that the first coil is sleeved on the periphery of the second coil.

Preferably, the inductor includes an inductance skeleton abutting against one end of each main transformer magnetic core and arranged on the base, an inductance magnetic core inserted into one end of each inductance skeleton, and an inductance winding wound on the inductance skeleton, and a lead pin of the inductance winding is connected with a lead pin of the main transformer winding.

Preferably, the inductor framework comprises a second bearing part and two second abutting parts connected to two ends of the second bearing part; every the second supports against the portion and includes two second V type portions just setting up and connect the second extension of two second V type portions, every the edge of second V type portion still is formed with to keeping away from the other end the second flange that the direction of second V type portion extended.

Preferably, each dc transformer winding includes a bearing sheet, two connection sheets vertically connected to two ends of the bearing sheet, and two insertion sheets connected to end portions of the connection sheets, the base is provided with a first slot corresponding to the insertion sheet, and the insertion sheet is inserted into the first slot.

Preferably, the surface of the base, which faces away from the transformer, is provided with a limiting portion, the transformer further comprises a connecting part, the connecting part is arranged in the limiting portion, two ends of the connecting part are respectively provided with a second slot, and two direct current transformer windings are respectively provided with an inserting piece which is inserted into the first slot and then inserted into the second slot.

Preferably, the base includes a first window, a second window and two wire insertion holes respectively located at outer sides of the first window and the second window, the first window and the second window respectively expose a portion of the inductor winding, and the main transformer winding is respectively connected in series with the inductor windings at two opposite ends thereof and then inserted into the wire insertion holes.

The utility model provides an integrated inductive transformer, direct current transformer and main transformer share two main transformer magnetic cores, namely, direct current transformer and main transformer share a magnetic circuit, can reduce the volume of the whole integrated inductive transformer; the main transformer skeleton includes first bearing part and connect in the first portion of supporting at first bearing part relative both ends supports to lean on the portion, first portion of supporting supports to be the V type structure, can reduce the shaping the plastic quantity of main transformer skeleton practices thrift the cost, still is favorable to pouring into of heat-conducting glue to promote the heat-sinking capability of magnetic core and main transformer skeleton.

Drawings

In order to more clearly illustrate the technical solution of the embodiments/modes of the present invention, the drawings needed to be used in the description of the embodiments/modes are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments/modes of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective structural view of an integrated inductive transformer according to an embodiment of the present invention.

Fig. 2 is a perspective view of the integrated inductance transformer shown in fig. 1 in another direction.

Fig. 3 is a schematic diagram of a first exploded structure of the integrated inductive transformer provided in fig. 1.

Fig. 4 is a schematic diagram of a second exploded structure of the integrated inductive transformer provided in fig. 1.

Description of the main elements

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, fig. 1 is a schematic perspective view of an integrated inductive transformer 100 according to an embodiment of the present invention. The integrated inductive transformer 100 includes a base 1, a main transformer 2, a dc transformer 4, two inductors 3, and a connecting member 5.

Referring to fig. 2-4, the base 1 is a plate made of an insulating material. The base 1 is used for carrying the main transformer 2, the direct current transformer 4 and the two inductors 3. The base 1 includes a first surface 11 and a second surface 12 opposite to the first surface 11. The main transformer 2, the direct current transformer 4 and the two inductors 3 are all disposed on the first surface 11. The base 1 comprises a first window 13, a second window 15, two wire inserting holes 17 positioned on the outer side of the first window 13 and two wire inserting holes 17 positioned on the outer side of the second window 15. The second surface 12 is further concavely provided with a limiting portion 18 for arranging the connecting part 5. The base 1 is further provided with a plurality of first slots 19 for fixing the direct current transformer 4. In the present embodiment, the number of the first slots 19 is 4.

The main transformer 2 comprises a main transformer framework 21, two main transformer magnetic cores 22 inserted at two ends of the main transformer framework 21, and a main transformer winding 23 wound on the main transformer framework 21.

The main transformer framework 21 includes a first bearing portion 210 and a first abutting portion 212 connected to two opposite ends of the first bearing portion 210. The first carrier 210 has a plurality of heat dissipation holes 211 arranged at equal intervals. The main transformer framework 21 further includes a containing cavity 215 penetrating through two opposite ends of the main transformer framework, and the containing cavity 215 is communicated with the heat dissipation hole 211.

Each of the first abutting portions 212 is formed by extending vertically outward from an edge of the first bearing portion 210. The first abutting portion 212 includes two first V-shaped portions 217 oppositely disposed and a first extending portion 218 connecting the two first V-shaped portions 217. In this embodiment, each of the first V-shaped portions 217 further has a first flange 219 protruding in a direction away from the first V-shaped portion 217 at the other end. First V type portion 217 can do benefit to the pouring of heat-conducting glue, so, promote the heat-sinking capability of main transformer skeleton 21 through heat-conducting glue.

The main transformer core 22 includes a core portion 220 and connecting portions 222 symmetrically connected to two ends of the core portion 220. Each of the connection portions 222 includes a bottom portion 224 vertically connected to the core 220 and a side portion 225 vertically connected to the other end portion of the bottom portion 224. The side portion 225 extends in the same direction as the core portion 220. The base 224 is substantially isosceles trapezoid, such that the main transformer core 22 includes two waist portions 226 that are V-shaped. That is, the V-shape of the waist portion 226 of the main transformer core 22 is matched to the V-shape of the main transformer bobbin 21, so that the conductive first flange 219 connected to the first V-shape 217 can be nested at the end of the waist portion 226 of the main transformer core 22 adjacent thereto.

The main transformer winding 23 includes a first coil 230 and a second coil 232, the first coil 230 and the second coil 232 are respectively formed by a hollow cylindrical structure surrounded by a metal cable, the diameter of the second coil 232 is smaller than that of the first coil 230, the first coil 230 and the second coil 232 are coaxially arranged, the first coil 230 is sleeved on the periphery of the second coil 232, and the first coil 230 and the second coil 232 are both sleeved on the first bearing portion 210.

The inductor 3 comprises an inductance framework 30 which is abutted against one end of the main transformer magnetic core 22 and is arranged on the base 1, two inductance magnetic cores 31 which are inserted into one end of each inductance framework 30 and an inductance winding 32 which is wound on the inductance framework 30, wherein a wiring pin 101 of the inductance winding 32 is connected with a wiring pin 101 of the main transformer winding 23.

The bobbin 30 is substantially identical to the main transformer bobbin 21. The inductor bobbin 30 includes a second carrying portion 320, and two second abutting portions 322 connected to two ends of the second carrying portion 320; each of the second abutting portions 322 includes two second V-shaped portions 327 oppositely disposed and a second extending portion 328 connecting the two second V-shaped portions 327. The edge of each second V-shaped portion 327 is further provided with a second flange 329 extending in a direction away from the other end of the second V-shaped portion 327. The second flange 329 of the edge of the second V-shaped portion 327 can be nested at the other end of the waist portion 226 of the main transformer core 22 adjacent thereto.

The structure of the inductor core 31 is substantially the same as that of the main transformer core 22, and will not be described herein.

The structure of the inductor winding 32 is substantially the same as the structure of the main transformer winding 23, and will not be described herein.

The dc transformer 4 comprises a magnetic core and two dc transformer windings 40 located outside the magnetic core. The magnetic core of the dc transformer 4 is the main transformer magnetic core 22, that is, the dc transformer 4 and the main transformer 2 share the same magnetic core. Each winding of the dc transformer 4 includes a bearing plate 401, two connecting plates 403 vertically connected to two ends of the bearing plate 401, and two insertion plates 405 connected to ends of the connecting plates 403. The insertion piece 405 is inserted into the first insertion groove 19 of the base 1. The two dc transformer windings 40 have a slightly different structure, wherein one of the connection tabs 403 of one of the dc transformer windings 40 has an L-shape, so that the connection tab 405 of one end thereof is perpendicularly connected thereto.

The connecting member 5 is a substantially S-shaped sheet-like body provided on the stopper portion 18, and second slots 51 are provided at both ends of the connecting member 5. The two windings of the dc transformer 4 are respectively inserted into the first slot 19 and then the second slot 51 by an insertion piece 405. The connecting part 5 can conduct the windings of the two direct current transformers 4.

Referring to fig. 4, during assembly, the connecting member 5 is fixed to the limiting portion 18 of the base 1, and then the main transformer 2 and the inductor 3 are sequentially assembled, the main transformer 2 is disposed at the middle position of the base 1, the inductors 3 are respectively disposed at two ends of the main transformer 2, and the inductor core 31 of the inductor 3 abuts against the main transformer core 22 of the main transformer 2. Each inductor 3 has 2 wiring pins 101, the main transformer 2 has 4 wiring pins 101 and the two ends of the main transformer 2 are respectively distributed with 2 wiring pins. Connecting one of 2 connection pins 101 of the inductor 3 with one of two connection pins 101 at one end of the main transformer 2, connecting another one of 2 connection pins 101 of the inductor 3 with another one of two connection pins 101 at one end of the main transformer 2 to protrude from two wire insertion holes 17 outside the first window 13, and connecting 2 connection pins 101 at the other end to protrude from two wire insertion holes 17 outside the second window 15, wherein the first window 13 and the second window 15 respectively expose part of the inductor 3 for heat dissipation; the two windings of the dc transformer 4 are respectively inserted from the outer side of the winding of the main transformer 2 to the first slot 19 of the base 1, and each of the two windings of the dc transformer 4 has a plug-in tab 405 capable of passing through the second slot 51 of the connecting part 5 to be fixed with the connecting part 5.

To sum up, in the integrated inductive transformer 100 of the present invention, the dc transformer 4 and the main transformer 2 share two main transformer magnetic cores 22, that is, the dc transformer 4 and the main transformer 2 share a magnetic circuit, which can reduce the volume of the whole integrated inductive transformer 100; main transformer skeleton 21 includes first bearing portion 210 and connect in the first portion 212 of supporting 210 opposite ends, first portion 212 of supporting is the V type structure of supporting, can reduce the shaping main transformer skeleton 21's plastic quantity, practices thrift the cost, still is favorable to the heat-conducting glue to follow pouring into of V type structure promotes magnetic core and main transformer skeleton 21's heat-sinking capability through the heat-conducting glue, has improved integrated inductive transformer 100's quality.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several of the means recited in the apparatus claims may also be embodied by one and the same means or system in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An integrated inductive transformer, comprising: a base, a main transformer arranged on the base, inductors arranged on the base and positioned at two ends of the main transformer, and a direct current transformer, the main transformer comprises a main transformer framework, two main transformer magnetic cores inserted at two ends of the main transformer framework and a main transformer winding wound on the main transformer framework, it is characterized in that the direct current transformer comprises two direct current transformer windings which are respectively supported against two ends of the main transformer framework and are positioned at the outer side of the main transformer windings, each direct current transformer winding is fixed with the base, the direct current transformer and the main transformer share two main transformer magnetic cores, the main transformer framework comprises a first bearing part and first abutting parts connected to two opposite end parts of the first bearing part, and the first abutting parts are of V-shaped structures.

2. The integrated inductive transformer of claim 1, wherein: the main transformer comprises a main transformer framework, a first bearing portion and a second bearing portion, wherein the main transformer framework is provided with a plurality of radiating holes, the radiating holes are evenly arranged on the first bearing portion at intervals, the main transformer framework further comprises accommodating cavities penetrating through two opposite ends of the main transformer framework, the radiating holes are communicated with the accommodating cavities, one end of a main transformer magnetic core is inserted and accommodated in the accommodating cavities of the first bearing portion, and a main transformer winding is sleeved on the outer wall of the first bearing portion.

3. The integrated inductance transformer of claim 2, wherein each of said first abutting portions includes two first V-shaped portions disposed opposite to each other and a first extending portion connecting the two first V-shaped portions, and a first flange extending in a direction away from the first V-shaped portion at the other end is further formed at an edge of each of said first V-shaped portions.

4. The integrated inductance transformer of claim 3, wherein said main transformer core includes a core portion and connecting portions symmetrically connected to both ends of said core portion, each of said connecting portions including a bottom portion vertically connected to said core portion and a side portion vertically connected to the other end portion of said bottom portion, said side portions extending in the same direction as the core portion.

5. The integrated inductive transformer according to claim 4, wherein said main transformer winding is wound around said first carrying portion, said main transformer winding comprises a first coil and a second coil, said first coil and said second coil are respectively formed by a hollow cylinder structure surrounded by a metal cable, said second coil has a smaller diameter than said first coil, said first coil and said second coil are coaxially disposed, said first coil is wound around said second coil.

6. The integrated inductive transformer of claim 5, wherein: the inductor is including leaning on in every main transformer magnetic core one end and set up in inductance skeleton, cartridge on the base are in each inductance magnetic core and the coiling of inductance skeleton one end are in inductance winding on the inductance skeleton, inductance winding's lead wire pin with main transformer winding's lead wire pin links to each other.

7. The integrated inductive transformer of claim 6, wherein said bobbin comprises a second carrier portion and two second abutting portions connected to two ends of said second carrier portion; every the second supports against the portion and includes two second V type portions just setting up and connect the second extension of two second V type portions, every the edge of second V type portion still is formed with to keeping away from the other end the second flange that the direction of second V type portion extended.

8. The integrated inductance transformer of claim 7, wherein each of said dc transformer windings comprises a support plate, two connection plates vertically connected to both ends of said support plate, and two insertion plates connected to ends of each of said connection plates, said base having a first slot corresponding to said insertion plate, said connection plates being inserted into said first slots.

9. The integrated inductive transformer of claim 8, wherein a position-limiting portion is disposed on a surface of the base facing away from the transformer, the transformer further comprises a connecting member disposed on the position-limiting portion, second slots are disposed at two ends of the connecting member, and two of the dc transformer windings are respectively inserted into the first slot and then inserted into the second slot by an insertion piece.

10. The integrated inductive transformer of claim 9, wherein said base comprises a first window, a second window and two wire insertion holes respectively located at the outer sides of the first window and the second window, said first window and said second window respectively expose a portion of said inductive windings, said main transformer windings are respectively connected in series with the inductor windings at two opposite ends thereof and then inserted into said wire insertion holes.