CN202839278U

CN202839278U - Winding planar transformer

Info

Publication number: CN202839278U
Application number: CN 201220534260
Authority: CN
Inventors: 李建兵
Original assignee: PLA Information Engineering University
Current assignee: PLA Information Engineering University
Priority date: 2012-10-18
Filing date: 2012-10-18
Publication date: 2013-03-27
Anticipated expiration: 2022-10-18

Abstract

The utility model relates to a winding planar transformer which comprises an upper magnetic core (10), a lower magnetic core (11) and a skeleton (2). The skeleton (2) comprises an upper insulation plate (4), a lower insulation plate (5) and a connecting vertical pillar (6) which is connected with the upper insulation plate (4) and the lower insulation plate (5). A through hole is formed in the connecting vertical pillar (6), and a winding (3) is wound on the outer side of the connecting vertical pillar (6). The upper magnetic core (10) and the lower magnetic core (11) are respectively buckled on the upper insulation plate (4) and the lower insulation plate (5). Central magnetic pillars of the upper magnetic core (10) and the lower magnetic core (11) are connected and combined in the through hole of the connecting vertical pillar (6), and periphery magnetic pillars are connected and combined on the periphery of the skeleton (2) to form a closed magnetic circuit. The winding planar transformer is simple in technology, simple in the winding process, and convenient to produce in a batched mode, so the planar transformer can be simultaneously suitable for requirements of large current, high voltage and multiple winding.

Description

The coiling flat surface transformer

Technical field

The utility model relates to a kind of coiling flat surface transformer.

Background technology

Flat surface transformer is the effective technical way that solves the volume miniaturization.At present flat surface transformer all uses the planar magnetic core of low clearance, but winding has various ways, and what wherein be most widely used mainly contains three kinds of forms.A kind of is to consist of winding by multi-layer PCB board or the stack of polylith double-layer PCB board, is subjected to the restriction of pcb board conduction copper mold thickness, and its winding current is unsuitable excessive, is not suitable for powerful application.The second is that thicker conducting metal paillon foil is processed into winding, can pass through larger electric current, be applicable to powerful application, but processing technology is complicated, and umber of turn is too much unsuitable, is not suitable for high-tension application.

The third is to make winding with insulated conductor, and the insulated conductor dish is become thinner pie structure, to reach the purpose that reduces the transformer height.The characteristics of insulation coiling are that the number of turn can be larger, can be used for high-voltage applications.And, as long as the wire diameter of selecting is enough thick, perhaps with the multiply winding parallel, can pass through larger electric current.It is many to want umber of turn, can pass through large electric current again, and pcb board and metal forming all are difficult to be competent at, and the most desirable is exactly with having wound the line winding.

But in flat surface transformer, the wire-wound group needs in advance it to be coiled into thinner pie, and the coiling difficulty is large, and complex process is not easy to the production of mass.In addition, dielectric strength is limited between the winding, is not suitable for high-voltage applications.In the higher application of voltage, common enamelled wire can't use, and can only use the high three layer insulation wire of dielectric strength, and the space service efficiency of transformer is reduced.

The utility model content

The purpose of this utility model provides a kind of coiling flat surface transformer, and pie coiling coiling difficulty is large in order to solve, the problem of complex process, reduction spatial transformer utilization rate.

For achieving the above object, scheme of the present utility model is: a kind of coiling flat surface transformer, comprise magnetic core (10), lower magnetic core (11), also be provided with skeleton (2), skeleton (2) comprises upper insulation plate (4), lower insulation plate (5) and is connected upper insulation plate (4) is connected 5 with lower insulation plate) connection column (6), be provided with through hole in the connection column (6), winding (3) is wound on the outside that connects column (6); Upper magnetic core (10), lower magnetic core (11) are fastened on respectively on upper insulation plate (4) and the lower insulation plate (5), and the center magnetic post of upper magnetic core (10), lower magnetic core (11) engages in described connection column (6) through hole, peripheral magnetic post engages to form closed magnetic circuit in skeleton (2) periphery.

Described connection column (6) outside also is provided with at least one deck dividing plate (9) parallel with upper insulation plate (4), lower insulation plate (5), and former limit winding and secondary winding are in the zones of different that dividing plate is separated.

The coiling of described winding (3) is enamelled wire or three layer insulation wire.

The utility model has designed the coiling flat surface transformer with skeleton, at first will wind the line on skeleton, and then magnetic core is installed, and technique is simple, and winding process is simple, is convenient to mass production; Make flat surface transformer be applicable to simultaneously the requirement of large electric current, high voltage and many windings.

Description of drawings

Fig. 1 is the exploded view of coiling flat surface transformer of the present utility model;

Fig. 2 is the individual layer skeleton structure diagram;

Fig. 3 is double-deck coiling flat surface transformer structure chart;

Fig. 4 is three layers of coiling flat surface transformer structure chart.

Embodiment

The utility model is described in more detail below in conjunction with accompanying drawing.

Embodiment 1

Such as Fig. 1, a kind of coiling flat surface transformer comprises magnetic core 10, lower magnetic core 11 and skeleton 2, and skeleton 2 is connected connection column 6 by upper insulation plate 4, lower insulation plate 5 and is consisted of with hollow, and winding 3 is wound on and connects column 6 outsides; Upper magnetic core 10, lower magnetic core 11 are fastened on respectively on upper insulation plate 4 and the lower insulation plate 5, are joined together to form closed magnetic circuit in connection column 6 inboards, skeleton periphery.

Upper magnetic core, lower magnetic core are planar magnetic core, and namely the employed flat magnetic core of conventional flat surface transformer comprises center magnetic core post and side core post.Fig. 1 is the magnetic core of EE type, also can be the magnetic core of other planar structure, such as PQ type etc.

Skeleton structure as shown in Figure 2.Made by insulating material, comprise upper insulation plate 4, lower insulation plate 5 and be connected column 6 three parts.The effect of upper insulation plate 4 is to allow insulation between winding 3 and the upper magnetic core 10, the effect of lower insulation plate 5 is to make winding 3 and lower magnetic core 11 insulation, connects column 6 and be hollow, formation through hole, shape of through holes conforms to the center magnetic core post of magnetic core, also makes winding 3 and the insulation of center magnetic core post.Connection column 6 Outboard Sections in the middle of the upper lower insulation plate are coiling place, make coiling keep flat structure, and need not other too much technique.The center magnetic core post of magnetic core passes the connection column through hole of skeleton up and down, and the both sides core post then is buckled in the both sides of skeleton periphery.

Winding 3 comprises former limit and secondary winding.For low-tension transformer, can directly use enamelled wire, for high voltage, in order to improve dielectric strength, use three layer insulation wire.Coiling is according to the coiling of magnetic core window direction, and winding leads is drawn from the magnetic core two ends, is connected to main circuit.

Embodiment 2

As shown in Figure 3, as improvement, on embodiment 1 basis, connecting the column 6 middle outsides increases one deck dividing plate 9, as shown in Figure 3.This dividing plate 9 separates former limit winding 7 with secondary winding 8.Different windings separate by dividing plate, realize High-Voltage Insulation between so different windings, so can be used for high-voltage applications.This improvement has increased the dielectric strength of former secondary winding on the one hand, makes on the other hand coiling convenient.

Embodiment 3

As further improvement, the situation of a plurality of secondary windings designs a plurality of dividing plates, and former limit winding and each secondary winding are all kept apart.As shown in Figure 4, be the situation of two secondary windings, skeleton has increased by two dividing plates, and former limit winding and two secondary windings are all kept apart.The situation of more secondary windings and Geng Duo dividing plate is similar.

Claims

1. coiling flat surface transformer, comprise magnetic core (10), lower magnetic core (11), it is characterized in that, also be provided with skeleton (2), skeleton (2) comprises upper insulation plate (4), lower insulation plate (5) and is connected upper insulation plate (4) is connected 5 with lower insulation plate) connection column (6), be provided with through hole in the connection column (6), winding (3) is wound on the outside that connects column (6); Upper magnetic core (10), lower magnetic core (11) are fastened on respectively on upper insulation plate (4) and the lower insulation plate (5), and the center magnetic post of upper magnetic core (10), lower magnetic core (11) engages in described connection column (6) through hole, peripheral magnetic post engages to form closed magnetic circuit in skeleton (2) periphery.

2. coiling flat surface transformer according to claim 1, it is characterized in that, described connection column (6) outside also is provided with at least one deck dividing plate (9) parallel with upper insulation plate (4), lower insulation plate (5), and former limit winding and secondary winding are in the zones of different that dividing plate is separated.

3. coiling flat surface transformer according to claim 1 and 2 is characterized in that, the coiling of described winding (3) is enamelled wire or three layer insulation wire.