CN213093002U

CN213093002U - Frameless high-frequency transformer

Info

Publication number: CN213093002U
Application number: CN202021911954.5U
Authority: CN
Inventors: 孙春阳; 王猛; 柳教成; 张庭春; 许锦为; 黄海敏
Original assignee: Hunan Liwang New Energy Co ltd
Current assignee: Hunan Liwang New Energy Co ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-04-30
Anticipated expiration: 2030-09-04

Abstract

The utility model relates to a transformer technical field, in particular to no skeleton high frequency transformer. The transformer comprises a magnetic core assembly, and a plurality of groups of primary windings and secondary windings sleeved on the magnetic core assembly; the primary winding is spiral, and the secondary winding is inserted on the primary winding at intervals; a PCB is fixed at the bottom of the magnetic core component; the primary winding and the secondary winding are respectively and electrically connected with the input end and the output end of the PCB. The primary winding is heliciform three-layer insulation conductive copper line, and secondary winding is the cyclic annular conducting strip that a plurality of blocks have the breach, and cyclic annular conducting strip interval inserts in the clearance that primary winding formed, realize keeping under the equal condition of electrical characteristic for the magnetic core window of transformer can make full use of, need not use the skeleton, and it is even to realize magnetic line of force distribution, and the radiating effect is outstanding, and electric energy conversion efficiency is higher, and the transformer of this scheme of utilization can reduce the volume of transformer, and reduce manufacturing cost.

Description

Frameless high-frequency transformer

Technical Field

The utility model relates to a transformer technical field, in particular to no skeleton high frequency transformer.

Background

The existing traditional high-frequency transformer generally comprises a framework, a magnetic core and a winding coil, wherein a conductor wire is wound on the framework to form the winding coil, namely, the winding coil is wound on a shaft core of the framework, the framework provides a winding space for the conductor wire in the transformer and fixes the magnetic core in the transformer, and the conductor wire mostly adopts an enameled round copper wire.

However, such a structure requires an independent framework as a support, the gap between the winding and the magnetic core is mostly more than 3mm, the utilization rate of the window of the transformer magnetic core is not high due to the large winding gap of the round copper wire coil, and the structure is not only high in cost, but also large in energy loss. And the support of the framework enables the whole transformer to be large in size and large in occupied space, and is not suitable for installation of products of various sizes.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an invention aim at provides a no skeleton high frequency transformer, adopts the utility model provides a technical scheme has solved the current transformer primary winding clearance that takes the skeleton as the support big, leads to energy loss big, occupies the big problem in space.

In order to solve the technical problem, the utility model provides a frameless high-frequency transformer, which comprises a magnetic core component and a plurality of groups of primary windings and secondary windings which are sleeved on the magnetic core component; the primary winding is spiral, and the secondary winding is inserted on the primary winding at intervals; a PCB is fixed at the bottom of the magnetic core component; the primary winding and the secondary winding are respectively and electrically connected with the input end and the output end of the PCB.

Preferably, the magnetic core assembly comprises a magnetic core seat and a magnetic core plate which can be covered on the magnetic core seat; a cylindrical magnetic core shaft for the primary winding and the secondary winding to be sleeved in is formed in the center of the magnetic core seat; and a containing groove for containing the primary winding and the secondary winding is formed at the periphery of the magnetic core shaft.

Preferably, heat conducting mud is arranged between the magnetic core plate and the magnetic core seat.

Preferably, the primary winding is a spiral conductive copper wire; the secondary winding is a plurality of annular conducting strips with notches; the annular conducting strips are inserted into gaps formed by the primary winding at intervals.

Preferably, slots are respectively formed at two tail ends of the annular conducting plates, and the slots of two adjacent annular conducting plates are arranged in a staggered manner; after a plurality of annular conductive sheets are stacked, three rows of slots are formed; the conductive plug is characterized by also comprising three conductive plug sheets inserted in the slots; the tail end of the conductive insertion sheet is inserted into the PCB, and the stacked annular conductive sheets form a spiral conductive loop.

Preferably, the contact surfaces of the primary winding and the secondary winding and the upper side surface of the PCB are coated with insulating heat-conducting layers.

Preferably, the insulating and heat conducting layer is made of heat conducting glue.

Preferably, a lead extends from the primary winding, and a through hole through which the lead passes is formed in the PCB.

Preferably, the magnetic core plate and the magnetic core seat are fixed through an insulating tape.

From the above, use the utility model provides a can obtain following beneficial effect: the utility model provides a no skeleton high frequency transformer, through setting up magnetic core assembly, primary winding and secondary winding on the magnetic core assembly are located to a plurality of organizes, primary winding is the insulating electrically conductive copper line of three-layer heliciform, secondary winding has the annular conducting strip of breach for a plurality of pieces, insert in the clearance that primary winding formed at annular conducting strip interval, insert through the conductive insertion sheet after a plurality of annular conducting strip stacks and arrange in on the PCB board, form spiral helicine conductive loop, and then realize under the equal condition of keeping electrical characteristic, make transformer core window can make full use of, do not need to use the skeleton, it is even to realize that the magnetic line of force distributes, the radiating effect is outstanding, electric energy conversion efficiency is higher, and the transformer of this scheme of utilization can reduce the volume of transformer, and reduce manufacturing cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive faculty.

Fig. 1 is an exploded view of the frameless high-frequency transformer according to the embodiment of the present invention;

fig. 2 is an assembly schematic diagram of the frameless high-frequency transformer according to the embodiment of the present invention;

fig. 3 is a perspective view of the frameless high-frequency transformer according to the embodiment of the present invention.

Detailed Description

The technical solution in 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. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. 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.

The existing traditional high-frequency transformer magnetic core basically adopts skeleton winding (winding a coil on a skeleton shaft core), and mostly adopts an enameled round copper wire as a conductor wire. The structure needs an independent framework as a support, the gap between the winding and the magnetic core is mostly more than 3mm, and the gap between the primary winding of the round copper wire is large, so that the utilization rate of the window of the magnetic core of the transformer is not high, the structure is high in cost and large in energy loss, and the support of the framework enables the whole transformer to be large in size, large in occupied space and not suitable for installation of products of various sizes.

In order to solve the above technical problems, the present embodiment provides a frameless high frequency transformer, as shown in fig. 1, which includes a magnetic core assembly 10, a plurality of sets of a primary winding 20 and a secondary winding 30 sleeved on the magnetic core assembly 10, wherein the primary winding 20 and the secondary winding 30 are hollow structures, the primary winding 20 is spirally sleeved on the magnetic core assembly 10, the secondary winding 30 is alternately inserted on the primary winding 20, the primary winding 20 and the secondary winding 30 are respectively electrically connected with an input end and an output end of a PCB 40, the secondary winding 30 is alternately inserted on the primary winding 20, further, the conductive loop can realize uniform distribution of magnetic lines of force without using a framework, has excellent heat dissipation effect, the window of the magnetic core of the transformer can be fully utilized, the frameless high-frequency transformer with high electric energy conversion efficiency is formed, the size of the transformer can be greatly reduced, and the manufacturing cost is reduced.

Specifically, the magnetic core assembly 10 includes a magnetic core base 11 in a chevron shape, and a magnetic core plate 12 capable of covering the magnetic core base 11, a cylindrical magnetic core shaft 111 is formed at the center of the magnetic core base 11, and a receiving groove for receiving the primary winding 20 and the secondary winding 30 is formed at the periphery of the magnetic core shaft 111. The primary winding 20 is provided with three layers, the three layers of primary windings 20 and the magnetic core shaft 111 in which the secondary winding 30 are sleeved are arranged, and the secondary winding 30 is inserted into each layer of primary winding 20 at intervals, so that the uniform distribution of magnetic lines of force is realized, the window of the magnetic core of the transformer can be fully utilized, and the energy loss is reduced.

Further, the primary winding 20 is a three-layer spiral insulating conductive copper wire, the secondary winding 30 is a plurality of annular conductive sheets 31 with gaps, the annular conductive sheets 31 are inserted into gaps formed by each layer of the primary winding 20 at intervals, slots 32 are respectively formed at two tail ends of each annular conductive sheet 31, the slots 32 of two adjacent annular conductive sheets 31 are arranged in a staggered mode, the plurality of annular conductive sheets 31 are stacked to form three rows of slots 32, the three layers of conductive inserts 33 are inserted into the slots 32, the tail ends of the conductive inserts 33 are inserted into the PCB 40, and then the stacked annular conductive sheets 31 form a spiral conductive loop. The window of the magnetic core of the transformer is fully utilized, and the volume of the transformer is reduced. The primary winding 20 has a lead extending therefrom, and the PCB 40 has a through hole for the lead to pass through.

In order to realize the fixed and insulated connection between the secondary winding 30 and each group of primary windings 20, the upper sides of each group of primary windings 20 and each annular conducting strip 31 are coated with an insulating and heat conducting layer 50, the insulating and heat conducting layer 50 provided in this embodiment is a heat conducting glue, the heat conducting glue on the upper surface of the annular conducting strip 31 is adhered to the lower surface of the primary winding 20, the heat conducting glue on the upper surface of the primary winding 20 is adhered to the lower surface of the annular conducting strip 31, so as to alternately adhere, the annular conducting strips 31 are inserted into the gap formed by the primary windings 20 at intervals and are sleeved on the magnetic core shaft 111, the heat conducting glue has the functions of heat conduction and fixed connection, meanwhile, the upper side of the PCB 40 is also coated with the heat conducting glue, and the heat dissipation effect.

Further, as shown in fig. 2, heat conducting paste 13 is installed between the magnetic core plate 12 and the magnetic core base 11, the primary winding 20 and the secondary winding 30 are installed behind the magnetic core shaft 111, the top end of the magnetic core shaft 111 is covered with the heat conducting paste 13, the heat conducting paste 13 is attached to the top annular conducting strip 31 and is in contact with the heat conducting glue on the annular conducting strip 31, so that the heat conducting paste 13 is led out and dissipated out of the heat of the primary winding 20 and the heat of the secondary winding 30, and the heat dissipation effect of the transformer is further improved.

As shown in fig. 3, the magnetic core plate 12 is pressed on the magnetic core base 11, so that the primary winding 20 and the secondary winding 30 are fixed on the magnetic core shaft 111, the magnetic core plate 12 is fixedly attached to the magnetic core base 11 through the insulating tape 60, and the insulating fixing tape 60 is wound around the periphery of the transformer, so that the fixation and insulation of the whole structure are realized.

To sum up, the utility model provides a no skeleton high frequency transformer, through setting up the magnetic core subassembly, primary and secondary winding on the magnetic core subassembly are located to a plurality of stack, primary is the insulating electrically conductive copper line of three-layer heliciform, secondary has the annular conducting strip of breach for a plurality of pieces, annular conducting strip interval inserts in the clearance that primary formed, insert through the conductive insertion piece after a plurality of annular conducting strip stacks and arrange in on the PCB board, form spiral helicine conductive loop, and then realize keeping under the equal condition of electrical characteristic, make transformer magnetic core window can make full use of, need not use the skeleton, it is even to realize magnetic line of force distribution, the radiating effect is outstanding, electric energy conversion efficiency is higher, and the transformer of this scheme of utilization can reduce the volume of transformer, and reduce manufacturing cost.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A frameless high-frequency transformer is characterized in that: the transformer comprises a magnetic core component (10), and a plurality of groups of primary windings (20) and secondary windings (30) which are sleeved on the magnetic core component (10); the primary winding (20) is spiral, and the secondary winding (30) is inserted on the primary winding (20) at intervals; a PCB (40) is fixed at the bottom of the magnetic core component (10); the primary winding (20) and the secondary winding (30) are respectively and electrically connected with the input end and the output end of the PCB (40).

2. The frameless high-frequency transformer of claim 1, wherein: the magnetic core assembly (10) comprises a magnetic core seat (11) and a magnetic core plate (12) which can be covered on the magnetic core seat (11); a magnetic core shaft (111) which is cylindrical and is used for sleeving the primary winding (20) and the secondary winding (30) is formed in the center of the magnetic core seat (11); and a containing groove for containing the primary winding (20) and the secondary winding (30) is formed at the periphery of the magnetic core shaft (111).

3. The frameless high-frequency transformer of claim 2, wherein: and heat conducting mud (13) is arranged between the magnetic core plate (12) and the magnetic core seat (11).

4. The frameless high-frequency transformer of claim 2, wherein: the primary winding (20) is a spiral conductive copper wire; the secondary winding (30) is a plurality of annular conducting strips (31) with gaps; the annular conducting strips (31) are inserted into gaps formed by the primary winding (20) at intervals.

5. The frameless high-frequency transformer of claim 4, wherein: slots (32) are respectively formed at the two tail ends of the annular conducting plates (31), and the slots (32) of the adjacent two annular conducting plates (31) are arranged in a staggered manner; a plurality of annular conducting strips (31) are stacked to form three rows of slots (32); the electric conduction plug-in board is characterized by also comprising three electric conduction plug-in sheets (33) inserted in the slots (32); the tail end of the conductive insertion sheet (33) is inserted into the PCB (40), and the annular conductive sheet (31) after being stacked forms a spiral conductive loop.

6. The frameless high-frequency transformer of claim 1, wherein: and the contact surfaces of the primary winding (20) and the secondary winding (30) and the upper side surface of the PCB (40) are coated with insulating heat-conducting layers (50).

7. The frameless high-frequency transformer of claim 6, wherein: the insulating heat conduction layer (50) is made of heat conduction glue.

8. The frameless high-frequency transformer of claim 2, wherein: a lead extends from the primary winding (20), and a through hole for the lead to penetrate out is formed in the PCB (40).

9. The frameless high-frequency transformer of claim 3, wherein: the magnetic core plate (12) and the magnetic core seat (11) are fixed through an insulating adhesive tape (60).