CN211088033U

CN211088033U - Resonance transformer

Info

Publication number: CN211088033U
Application number: CN201921878197.3U
Authority: CN
Inventors: 鞠万金; 朱勇; 李平
Original assignee: SHENZHEN JINGQUANHUA ELECTRONICS CO LTD
Current assignee: SHENZHEN JINGQUANHUA ELECTRONICS CO LTD
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-07-24
Anticipated expiration: 2029-11-01

Abstract

The utility model provides a resonance transformer, it includes bottom plate and at least one transformer unit, be provided with at least one first location portion on the bottom plate, transformer unit includes the skeleton, the skeleton includes wire winding portion and sets up the first end plate and the second end plate at the relative both ends of wire winding portion, first end plate be provided with the corresponding second location portion of first location portion, first location portion and the cooperation of second location portion are in order to incite somebody to action transformer unit detachably sets up on the bottom plate.

Description

Resonance transformer

Technical Field

The utility model relates to a power technical field especially relates to a resonance 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 resonance 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 resonant 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, if the resonant transformer in the prior art includes more than one transformer, a large assembly space is usually required, and it is difficult to disassemble the resonant transformer after assembly if the resonant transformer needs to be repaired due to quality problems.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a resonance transformer that space utilization is high.

A resonance transformer comprises a bottom plate and at least one transformer unit, wherein at least one first positioning part is arranged on the bottom plate, the transformer unit comprises a framework, the framework comprises a winding part, a first end plate and a second end plate, the first end plate and the second end plate are arranged at two opposite ends of the winding part, the first end plate is provided with a second positioning part corresponding to the first positioning part, and the first positioning part and the second positioning part are matched to detachably arrange the transformer unit on the bottom plate.

Preferably, the bottom plate is provided with a plurality of first positioning portions, each first positioning portion includes two first positioning posts which are convexly disposed on the bottom plate and are oppositely disposed, one end of each first positioning post, which is far away from the bottom plate, includes a hanging tooth, and the hanging teeth of the two first positioning posts are oppositely disposed.

Preferably, the first end plate comprises a first connecting plate connected with the winding portion and two oppositely arranged supporting portions, each supporting portion is arc-shaped, the supporting portions extend from the edge of the first connecting plate to the direction far away from the second end plate, the second positioning portion is a window formed on the supporting portions, and the two windows on the two supporting portions are arranged oppositely; the edge of second end plate is to keeping away from the direction extension of first end plate is formed with two just fixed plates, every the fixed plate is the arc, two the arc part of fixed plate is to being close to each other, and every fixed plate deviates from surface each other and is provided with third location portion.

Preferably, the transformer unit further includes a coil group wound on the winding portion and a magnetic core group disposed outside the coil group.

Preferably, the skeleton includes through holes penetrating through opposite ends thereof, the magnetic core group includes a pair of upper and lower magnetic cores disposed oppositely, the structure and size of the upper magnetic core are the same as those of the lower magnetic core, the upper magnetic core includes a bottom, a core and two corresponding flanges, the core is formed by a middle protrusion of the bottom, the core is cylindrical, the two flanges are formed by protrusions at opposite ends of the bottom, the protrusion direction of the two flanges is the same as that of the core, and the flanges are arc-shaped; the lower magnetic core is arranged on the bottom plate, the core part of the lower magnetic core is inserted into one end of the through hole, the upper magnetic core is arranged on the second end plate, the core part of the upper magnetic core is inserted into the other end of the through hole, and the flange of the upper magnetic core is supported against the flange of the lower magnetic core to enclose the coil assembly.

Preferably, the coil assembly 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 includes two first pins respectively extending from the lower end of the first coil; the second coil comprises two second pins which are respectively extended out from the lower end of the second coil, the first coil and the second coil are coaxially arranged, the second coil is sleeved on the core part of the magnetic core group, and the first coil is sleeved on the periphery of the second coil.

Preferably, the bottom plate is further provided with at least one lead hole group, the lead hole group includes two first lead holes and two second lead holes, the two first lead holes and the two second lead holes are respectively disposed at outer sides of the two first positioning posts, the first pins penetrate through the first lead holes to be located at the other side of the bottom plate, and the second pins penetrate through the second lead holes to be located at the other side of the bottom plate.

Preferably, the resonance transformer further comprises an upper buckle cover, the upper buckle cover comprises a hollowed-out plate, two opposite side plates and two opposite matching plates, the two opposite side plates are formed by extending the edges of the hollowed-out plate in the direction close to the bottom plate, the two opposite matching plates are located between the two side plates, the extending direction of the matching plates is consistent with the extending direction of the side plates, the matching plates are arc-shaped, a fourth positioning portion matched with the third positioning portion is arranged on the matching plates, and the third positioning portion is matched with the fourth positioning portion to fix the upper buckle cover with the second end plate and fix the upper magnetic core between the upper buckle cover and the second end plate.

Preferably, the resonant transformer further includes an insulating pad, the bottom plate is provided with at least one recess, the insulating pad is disposed in the recess, the first end plate of the bobbin is disposed on the insulating pad, the insulating pad includes a substrate and two arc-shaped protruding pieces located at two opposite sides of the substrate, each protruding piece extends from an edge of the substrate in a direction away from the bottom plate, and a protruding direction of the protruding piece is matched with the shape of the bottom of the magnetic core to clamp the bottom of the magnetic core.

Preferably, the resonant transformer further comprises a thermal conductive damping gasket disposed between the upper cover and the upper core.

The utility model provides a resonance transformer owing to be in transformer unit detachably sets up on the bottom plate, made things convenient for resonance transformer's maintenance, the bottom plate enables transformer unit interval arrangement sets up, is favorable to transformer unit's heat dissipation.

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 schematic perspective view of a resonant transformer according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a first exploded structure of the resonant transformer shown in fig. 1.

Fig. 3 is a perspective view of a bobbin included in the resonance transformer provided in fig. 1.

Fig. 4 is a sectional view of the resonance transformer shown in fig. 1 in the direction IV-IV.

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 and fig. 2, fig. 1 is a schematic perspective view of a resonant transformer 100 according to an embodiment of the present invention, and fig. 2 is an exploded view of the resonant transformer 100 shown in fig. 1. The resonant transformer 100 is applied to the field of power supplies and transformers. The resonance transformer 100 comprises a bottom plate 1, an insulating pad 2, a transformer unit 3 arranged on the insulating pad 2, a heat-conducting damping gasket 4 positioned on the other side of the transformer unit 3, and an upper buckle cover 5 buckled on the transformer unit 3.

Referring to fig. 2-4, the bottom plate 1 is provided with at least one first positioning portion 10. In the present embodiment, the base plate 1 is substantially in the form of a rectangular sheet.

It will be appreciated that the base plate 1 may have other variations, for example, in other embodiments, the base plate 1 may be provided in other shapes such as square, circular, etc. So that the base plate 1 can integrate the functions of four, five, six transformer units 3, or the functions of more transformer units 3.

In the present embodiment, the base plate 1 is provided with a plurality of first positioning portions 10 at intervals. Each first positioning portion 10 includes two first positioning posts 101 protruding from the bottom plate 1 and disposed oppositely, one end of each first positioning post 101 away from the bottom plate 1 includes a hanging tooth 103, and the hanging teeth 103 of the two first positioning posts 101 are disposed opposite to each other.

The base plate 1 is provided with at least one recess 12, in the present embodiment, the base plate 1 is provided with a plurality of recesses 12, and one transformer unit 3 is provided for each recess 12.

At least one lead hole set 14 is further formed on the bottom plate 1, and the lead hole set 14 includes two first lead holes 142 and two second lead holes 144. The two first lead holes 142 and the two second lead holes 144 are respectively disposed outside the two first positioning posts 101. In the present embodiment, a plurality of lead hole groups 14 are provided on the base plate 1, and each lead hole group 14 corresponds to one transformer unit 3.

The insulating pad 2 is disposed in the recess 12. The insulating pad 2 comprises a base sheet 20 and two arc-shaped protruding sheets 22 positioned at two opposite sides of the base sheet 20, wherein each protruding sheet 22 extends from the edge of the base sheet 20 to a direction away from the bottom plate 1. The insulating pad 2 can be a silica gel pad, and can also be a pad made of other insulating materials known to those skilled in the art. The insulating pad 2 can reduce the influence of the resonant transformer 100 on other circuit components; and heat generation due to leakage flux is reduced.

The transformer unit 3 includes a bobbin 30, a magnetic core group 32, and a coil group 34. The magnetic core group 32 and the coil group 34 are used for voltage and current conversion.

Referring to fig. 3, the bobbin 30 is a cylindrical structure, and the bobbin 30 includes a winding portion 301, and a first end plate 303 and a second end plate 305 disposed at two opposite ends of the winding portion 301. The cage 30 also includes through-holes 307 extending through opposite ends thereof. The bobbin 30 is made of an insulating material. In the present embodiment, the frame 30 is made of plastic material.

The first end plate 303 includes a first connecting plate 3031 connected to the winding portion 301 and two support portions 3033 disposed opposite to each other, each of the support portions 3033 has an arc shape, and the support portions 3033 extend from an edge of the first connecting plate 3031 to a direction away from the second end plate 305.

The first end plate 303 is provided with second positioning portions 3035 corresponding to the first positioning portions 10. In the present embodiment, the second positioning portion 3035 is a window formed in the support portion 3033.

The edge of the second end plate 305 extends in a direction away from the first end plate 303 to form two opposite fixing plates 309, each fixing plate 309 is arc-shaped, and the arc-shaped parts of the two fixing plates 309 are close to each other. The surfaces of each fixing plate 309 facing away from each other are provided with third positioning portions 313. The bending direction of the fixing plate 309 corresponds to a position of the supporting portion 3033 in the vertical direction.

The magnetic core group 32 includes a pair of upper magnetic cores 321 and lower magnetic cores 323 arranged oppositely, and the structure and size of the upper magnetic cores 321 are the same as those of the lower magnetic cores 323. The upper core 321 includes a bottom 325, a core 327, and two oppositely disposed flanges 329. The core 327 is formed by a middle protrusion of the bottom 325, the core 327 is cylindrical, two flanges 329 are formed by two opposite ends of the bottom 325, the protrusion direction of the two flanges is the same as that of the core 327, and the flanges 329 are circular arc-shaped. The lower magnetic core 323 is disposed on the bottom plate 1, and the core portion 327 thereof is inserted into one end of the through hole 307, and the upper magnetic core 321 is disposed on the second end plate 305, and the core portion 327 thereof is inserted into the other end of the through hole 307.

The coil assembly 34 includes a first coil 340 and a second coil 342. The first coil 340 and the second coil 342 are respectively formed by a hollow cylinder structure surrounded by a metal cable. The metal cable can be made of enameled round copper wires, copper foils, flat enameled copper wires, aluminum wires or three-layer insulated wires or the combination of the above materials. The diameter of the second coil 342 is smaller than the diameter of the first coil 340. The first coil 340 includes two first pins 343, which respectively extend from a lower end of the first coil 340. The second coil 342 includes two second leads 345, which extend from the lower end of the second coil 342. The first coil 340 and the second coil 342 are coaxially disposed, and the second coil 342 is wound around the winding portion 301. The first coil 340 is sleeved on the periphery of the second coil 342. In the embodiment, the second coil 342 and the first coil 340 are sleeved by the inner and outer ring primary-secondary sleeves, so that the inductance coefficient of the transformer unit 3 is increased, the overall size of the transformer unit 3 is reduced, the space utilization rate is improved, and the heat dissipation effect is better.

Referring to fig. 4, the thermal conductive damping pad 4 is disposed between the upper cover 5 and the upper core 321. The heat-conducting damping pad 4 may be made of a metal material having a good heat-conducting property. The heat-conducting damping pad 4 can prevent external moisture from entering the transformer unit 3 to affect the normal operation of the magnetic core assembly 32 and the coil assembly 34, and is also beneficial to diffusing the heat generated by the coil assembly 34.

The upper buckle cover 5 is used for fixing the magnetic core group 32 and the framework 30. The upper buckle cover 5 comprises a hollow plate 50, two opposite side plates 52 formed by extending from the edge of the hollow plate 50 to a direction close to the bottom plate 1, and two opposite matching plates 54 located between the two side plates 52. The engagement plate 54 extends in the same direction as the side plate 52. The mating plate 54 is arcuate. The engagement plate 54 is provided with a fourth positioning portion 540 engaged with the third positioning portion 313. In the present embodiment, the fourth positioning portion 540 is a hole opened in the engagement plate 54.

During assembly, the insulating pad 2 is firstly arranged in the concave portion 12 of the base plate 1, the lower magnetic core 323 is arranged on the insulating pad 2, the framework 30 wound with the coil assembly 34 is arranged on the lower magnetic core 323, the through hole 307 of the framework 30 is sleeved on the core portion 327 of the lower magnetic core 323, the first pin 343 is arranged in the first lead hole 142 to be positioned at the other side of the base plate 1, the second pin 345 is arranged in the second lead hole 144 to be positioned at the other side of the base plate 1, and the first positioning portion 10 and the second positioning portion 3035 are matched to fix the framework 30 and the insulating pad 2 on the base plate 1; the core portion 327 of the upper magnetic core 321 is inserted into the other end of the through hole 307, the flange 329 of the upper magnetic core 321 abuts against the flange 329 of the lower magnetic core 323 to surround the coil assembly 34, the heat-conducting damping gasket 4 is disposed on the surface of the upper magnetic core 321, the upper cover 5 is fastened on the surface of the heat-conducting damping gasket 4, and the side plate 52 of the upper cover 5 corresponds to the flange 329 of the upper magnetic core 321. The fourth positioning portion 540 of the upper buckle cover 5 is matched with the third positioning portion 313 arranged on the second end plate 305 of the framework 30, so as to fix the upper buckle cover 5 and the second end plate 305 and fix the upper magnetic core 321 between the upper buckle cover 5 and the second end plate 305.

In this embodiment, the insulating pad 2 and the bottom plate 1, the upper magnetic core 321 and the lower magnetic core 323 included in the magnetic core group 32, and the thermal damping gasket 4 and the upper magnetic core 321 may be fixed by epoxy glue.

It can be understood of course that, because the concave part 12 for bearing the insulating pad 2 is arranged on the bottom plate 1, the concave part 12 can play a limiting role, so that the insulating pad 2 and the bottom plate 1 can be fixed without epoxy glue, when the insulating pad 2 is used for a certain time and needs to be replaced, the aged insulating pad 2 can be replaced and can be continuously used only by detaching the framework 30 from the bottom plate 1, the service life is prolonged, and the cost is saved.

To sum up, the utility model provides a resonance transformer 100 is owing to be in transformer unit 3 detachably sets up on the bottom plate 1, just be provided with the pin hole on the bottom plate 1, made things convenient for resonance transformer 100's maintenance and coil assembly 34's pin are fixed, and transformer unit 3 is the interval arrangement setting, is favorable to transformer unit 3's heat dissipation.

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. A resonant transformer, it includes bottom plate and at least one transformer unit, its characterized in that: the transformer unit comprises a bottom plate, at least one first positioning part is arranged on the bottom plate, the transformer unit comprises a framework, the framework comprises a winding part, a first end plate and a second end plate, the first end plate and the second end plate are arranged at two opposite ends of the winding part, a second positioning part corresponding to the first positioning part is arranged on the first end plate, and the first positioning part and the second positioning part are matched with each other to detachably set the transformer unit on the bottom plate.

2. The resonant transformer of claim 1, wherein: the bottom plate is provided with a plurality of spaced first positioning portions, each first positioning portion comprises two first positioning columns which are convexly arranged on the bottom plate and are oppositely arranged, one end, far away from the bottom plate, of each first positioning column comprises a hanging tooth, and the hanging teeth of the two first positioning columns are oppositely arranged.

3. The resonant transformer of claim 2, wherein: the first end plate comprises a first connecting plate connected with the winding part and two opposite supporting parts, each supporting part is arc-shaped, the supporting parts extend from the edge of the first connecting plate to the direction far away from the second end plate, the second positioning part is a window formed on the supporting parts, and the two windows on the two supporting parts are arranged oppositely; the edge of second end plate is to keeping away from the direction extension of first end plate is formed with two just fixed plates, every the fixed plate is the arc, two the bulge of fixed plate is to being close to each other, and every fixed plate deviates from surface each other and is provided with third location portion.

4. The resonant transformer of claim 3, wherein: the transformer unit further comprises a coil group wound on the winding part and a magnetic core group arranged on the outer side of the coil group.

5. The resonant transformer of claim 4, wherein: the framework comprises a through hole penetrating through two opposite ends of the framework, the magnetic core group comprises a pair of upper magnetic core and lower magnetic core which are oppositely arranged, the structure and the size of the upper magnetic core are the same as those of the lower magnetic core, the upper magnetic core comprises a bottom, a core part and two corresponding flanges, the core part is formed by a protrusion in the middle of the bottom, the core part is cylindrical, the two flanges are formed by protrusions at two opposite ends of the bottom, the protrusion direction of the two flanges is the same as that of the core part, and the flanges are arc-shaped; the lower magnetic core is arranged on the bottom plate, the core part of the lower magnetic core is inserted into one end of the through hole, the upper magnetic core is arranged on the second end plate, the core part of the upper magnetic core is inserted into the other end of the through hole, and the flange of the upper magnetic core is supported against the flange of the lower magnetic core to jointly enclose the coil group.

6. The resonance transformer according to claim 5, wherein the coil assembly 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 cylindrical structure, the diameter of the second coil is smaller than that of the first coil, the first coil includes two first pins, and the two first pins respectively extend from a lower end of the first coil; the second coil comprises two second pins which are respectively extended out from the lower end of the second coil, the first coil and the second coil are coaxially arranged, the second coil is sleeved on the winding part, and the first coil is sleeved on the periphery of the second coil.

7. The resonant transformer of claim 6, wherein: at least one lead wire hole group is further arranged on the bottom plate and comprises two first lead wire holes and two second lead wire holes, the two first lead wire holes and the two second lead wire holes are respectively arranged on the outer sides of the two first positioning posts, the first lead wire holes are arranged in a penetrating mode to be located on the other side of the bottom plate, and the second lead wire holes are arranged in a penetrating mode to be located on the other side of the bottom plate.

8. The resonant transformer of claim 6, wherein: resonance transformer still includes the upper cover, the upper cover includes the fretwork board, certainly fretwork flange reason is to being close to two just right curb plates that form and be located two are extended to the direction of bottom plate two relative cooperation boards between the curb plate, the extending direction of cooperation board with the extending direction of curb plate is unanimous, the cooperation board is the arc, be provided with on the cooperation board with third location portion matched with fourth location portion, third location portion and fourth location portion cooperation in order to incite somebody to action the upper cover with the second end plate is fixed and will go up the magnetic core and be fixed in the upper cover with between the second end plate.

9. The resonant transformer of claim 7, wherein: the resonance transformer further comprises an insulating pad, at least one concave portion is arranged on the bottom plate, the insulating pad is arranged in the concave portion, the first end plate of the framework is arranged on the insulating pad, the insulating pad comprises a substrate and two arc-shaped protruding pieces located on two opposite sides of the substrate, each protruding piece extends from the edge of the substrate to the direction far away from the bottom plate, and the protruding direction of the protruding pieces is matched with the bottom of the magnetic core in shape so as to clamp the bottom of the magnetic core.

10. The resonant transformer of claim 8, wherein: the resonance transformer further comprises a heat conduction damping gasket, and the heat conduction damping gasket is arranged between the upper buckle cover and the upper magnetic core.