CN201369233Y

CN201369233Y - Ring-shaped transformer

Info

Publication number: CN201369233Y
Application number: CNU2009200520674U
Authority: CN
Inventors: 顾益铮
Original assignee: SHENZHEN MEIKAI ELECTRONICS STOCK CO Ltd
Current assignee: SHENZHEN MEIKAI ELECTRONICS STOCK CO Ltd
Priority date: 2009-03-04
Filing date: 2009-03-04
Publication date: 2009-12-23
Anticipated expiration: 2019-03-04

Abstract

The utility model relates to a transformer, in particular to a ring-shaped transformer. The ring-shaped transformer comprises a ring-shaped magnetic core, and a primary winding and a secondary winding wound on the ring-shaped magnetic core; the primary winding is wound on a supporting framework on the ring-shaped magnetic core; and the secondary winding is directly wound on the magnetic core. When the ring-shaped transformer is used in a power supply of a ultrathin LCD TV, to replace transformers with traditional structures such as an EC, a PQ, an EFD, an EPC and the like, the advantages of low height, good heat radiation conditions, simple structure and the like can be achieved, and demands of the ultrathin TV can be easily satisfied.

Description

Toroidal transformer

Technical field

The utility model relates to a kind of transformer, especially a kind of toroidal transformer.

Background technology

At present, in the power supply of LCD TV, all used a kind of toroidal transformer, along with the thickness of LCD TV is more and more littler, the height of transformer and heat radiation all there are higher requirement, existing toroidal transformer can not further satisfy the requirement of ultra-thin LCD TV.

Have in the prior art and a kind ofly adopt flat " EPC " shape magnetic core, horizontal type structure, and reduced size as far as possible in height, to satisfy " ultra-thin " requirement.But in height total skeleton, magnetic core and three levels of line bag of having comprised make to be compressed with certain limit.

1, secondary winding particularly, because of big electric current will use very thick line, and the width that winds the line is limited, occupy very big height around two-layer or three layers;

2. can not excessively compress the size of magnetic core, because the sectional area of magnetic core is signifying the power of transformer.If when the thickness of center pillar was 5mm, total height can surpass 11mm

3. the big electric current of inferior level is drawn by the irony CP line guide pin of Φ 1.0mm, produces very big pressure drop and loss, produces heat.

Generally under the situation that can't reach specified altitude, can only will on pcb board, take the way of perforate, diminish the mechanical strength of pcb board like this.

Summary of the invention

One of the purpose of this utility model provides the toroidal transformer that a kind of height is low, heat radiation is good.

To achieve these goals, the utility model adopts following technical scheme:

It comprises a toroidal core and wind as for elementary winding and secondary winding on the toroidal core that its improvement is: described elementary winding winds as on the support frame on the toroidal core, and described secondary winding directly is wound on the magnetic core.

Preferably, described secondary winding connects the insulating trip of drawing line end of a fixed secondary winding.

Preferably, described annular core is the annular ferrite core of PC40 material.

Toroidal transformer of the present utility model uses in the power supply of ultra-thin shape liquid crystal TV set, substitute the transformer of EC, PQ, traditional structures such as EFD, EPC, have highly lowly, radiating condition reaches advantages of simple structure and simple well, can realize the needs of ultrathin TV at an easy rate.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

The utility model purpose, function and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.

Embodiment

As shown in Figure 1, the toroidal transformer of present embodiment comprises a toroidal core 1 and winds as for elementary winding 2 on the toroidal core and secondary winding 3, described elementary winding 2 winds as on the support frame on the toroidal core 1 11, and described secondary winding 3 directly is wound on the magnetic core 1.

In the present embodiment, in order to reduce the loss under big electric current (8-13A) the output situation, reduce heating, described secondary winding 3 connects the insulating trip of drawing line end 12 of a fixed secondary winding.And traditional method is to draw by the mode of irony contact pin, and loss and caloric value are all very big.

Described annular core is the annular ferrite core of PC40 material.

The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.

Claims

1, a kind of toroidal transformer, it comprises a toroidal core and wind as for elementary winding and secondary winding on the toroidal core, it is characterized in that: described elementary winding winds as on the support frame on the toroidal core, and described secondary winding directly is wound on the magnetic core.

2, toroidal transformer as claimed in claim 1 is characterized in that: described secondary winding connects the insulating trip of drawing line end of a fixed secondary winding.

3, toroidal transformer as claimed in claim 1 or 2 is characterized in that: described annular core is the annular ferrite core of PC40 material.