CN202110931U

CN202110931U - Planar transformer

Info

Publication number: CN202110931U
Application number: CN2011200400805U
Authority: CN
Inventors: 张莉
Original assignee: Individual
Current assignee: NINGBO SNAPPY OPTOELECTRONICS CO Ltd
Priority date: 2011-02-14
Filing date: 2011-02-14
Publication date: 2012-01-11
Anticipated expiration: 2021-02-14

Abstract

The utility model relates to a planar transformer, comprising an iron core and at least one PCB board. The integral iron core has a flat annular shape, and surrounds the periphery of the two PCB boards. The PCB boards are multilayer PCB boards, with copper foil wires therein forming coils. In addition, leads on the PCB boards are inserted pins. Compared with the prior art, the copper foil wires in the PCB boards are used to form the coils, reducing the volume and the weight of the transform, increasing the output power of the transform and making product flattening easier under the same power condition. Compared with conventional winding transformers, the planar transformer adopting the PCB boards is very good in high frequency characteristic and excellent in insulating property, heat-dissipating effect and winding coupling, and is superior not matter in terms of cost, volume, weight, performance, etc.

Description

Flat surface transformer

Technical field

The utility model relates to the technical field of transformer, relates in particular to a kind of flat surface transformer.

Background technology

Transformer is by electromagnetic induction principle, with identical frequency, and a kind of static electric equipment of voltage of transformation or electric current between two or more windings.Traditional coiling transformer, generally comprise the insulation material coil brace, be wrapped in the coil on the coil brace and be coated on the iron core outside the coil.Current; Power electronic equipment is constantly towards small size more, more high power density and more high efficiency direction develop; Transformer also is tending towards lightly changing designs as one of key element in the power electronic equipment, causes transformer also to require dimensionally to dwindle relatively; Like this, the flat surface transformer demand increases day by day.And traditional coiling transformer can not meet the demands already, needs further to improve.

On the other hand, pcb board (abbreviation of Printed Circuit Board means printed circuit board (PCB)) since being born, has developed into two-sided, multilayer from individual layer.Characteristics such as low mistake, low cost, volume are little because it is produced, performance height in the development engineering of electronic equipment, remain this great vitality.It is on insulating substrate, by predetermined design, processes printed wiring, printed component or by the conductive pattern of both be combined intos, is covered with the Copper Foil line in the printed board and as lead.

The utility model content

The utility model technical problem to be solved is to the present situation of prior art a kind of flat surface transformer to be provided; It has fabulous high frequency characteristics, and good insulation preformance makes that volume of transformer is littler, power output is big; Under the condition of same power, product more is prone to flattening.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this flat surface transformer, comprise an iron core, and it is characterized in that: also comprise at least one pcb board, the Copper Foil line on the pcb board forms coil, and iron core is looped around the periphery of pcb board.

As further improvement, said pcb board is a multi-layer PCB board, and itself insulate between every layer of pcb board, can design the Copper Foil line as required, and the Copper Foil line of every layer of pcb board connects mutually, then can improve the number of turn of coil.

As further improvement, according to PCB number of plies actual conditions, said iron core periphery can be coated with insulating tape.

For the leakage inductance that makes transformer is lower, loss is littler, increases work efficiency, and the pcb board of said iron core central authorities can be provided with two or more than two at interval in the upper and lower, and the number of plies of piece number and every pcb board can design according to actual needs.

Be to increase the coil setting, can also be provided with insulated wire between two pcb boards up and down and as coil.

Pin on the common pcb board adopts a hole one pin that form is set at interval, and two pcb boards are linked together, and traditional method is to connect with electric iron; Corresponding coil in two pcb boards is linked to each other; To connect operation simpler in order to make, connect more reliable, can be between two pcb boards; Wherein the pin on pcb board adopts many PIN contact pin form; And corresponding pin adopts the aperture form on another piece pcb board, and the pin of each contact pin form is inserted in the aperture of corresponding pin, coil corresponding in these two pcb boards is linked to each other and forms a closing coil.So, adopt contact pin form arranged side by side, can disposable all contact pins all be inserted in the corresponding pin bores, two pcb boards are electrically connected about inciting somebody to action with wave-soldering again, form a closing coil.

Compared with prior art, the utility model utilizes Copper Foil line on the pcb board as coil, and to make that volume of transformer is littler, weight becomes lighter, power output is big; Under the condition of same power, product more is prone to flattening, adopts the flat surface transformer of pcb board to compare with tradition coiling transformer; Has fabulous high frequency characteristics; Good insulation preformance, it is good to dispel the heat, and the coupling between winding is well; All more win at aspects such as cost, volume weight, performances and one to raise, all can use in fields such as communication, computer, automotive electronics, digital camera, DTVs.

Description of drawings

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

Fig. 2 is the end view of the utility model embodiment.

Fig. 3 is the circuit diagram of the utility model embodiment.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Like Fig. 1～shown in Figure 3, this flat surface transformer comprises that an iron core 1, two are between the upper and lower at a distance from the pcb board 2 that is provided be arranged on up and down insulated wire between two pcb boards 2 (among the figure blocked by iron core 1 and not shown);

Wherein, iron core 1 integral body is flat ring-type, is looped around the periphery of two pcb boards 2;

Said iron core 1 periphery is coated with the insulating tape (not shown);

In the present embodiment, two pcb board 2 equal multi-layer PCB boards, the Copper Foil line in upper and lower two pcb boards forms primary coil La, ancillary coil Lc respectively, and insulated wire adopts the high three-layer insulated property of withstand voltage properties and forms secondary coil Lb;

As shown in Figure 3, the transformer one of present embodiment has six pins, is respectively L1, L2, L3, L4, P1, P2; Wherein, Pin L2, L1 are respectively the not-go-end that rises of primary coil La, and pin L4, L3 are respectively the not-go-end that rises of ancillary coil Lc, and pin P1, P2 are respectively the not-go-end that rises of secondary coil Lb; And pin L1, L2, L3, L4 are the connection that PIN contact pin form is convenient to up and down Copper Foil line in two pcb boards.

Claims

1. a flat surface transformer comprises an iron core, it is characterized in that: also comprise at least one pcb board, the Copper Foil line on the pcb board forms coil, and iron core is looped around the periphery of pcb board.

2. flat surface transformer according to claim 1 is characterized in that: said pcb board is a multi-layer PCB board.

3. flat surface transformer according to claim 1 is characterized in that: said iron core periphery is coated with insulating tape.

4. flat surface transformer according to claim 1 is characterized in that: the central pcb board of said iron core is provided with two or more than two at interval in the upper and lower.

5. flat surface transformer according to claim 4 is characterized in that: also be provided with insulated wire between two pcb boards up and down and as coil.

6. according to claim 4 or 5 described flat surface transformers; It is characterized in that: in two pcb boards; Wherein the pin on pcb board adopts many PIN contact pin form; And corresponding pin adopts the aperture form on another piece pcb board, and the pin of each contact pin form is inserted in the aperture of corresponding pin, coil corresponding in these two pcb boards is linked to each other and forms a closing coil.