CN2243117Y

CN2243117Y - Anti-thunder transformer

Info

Publication number: CN2243117Y
Application number: CN 95207639
Authority: CN
Inventors: 吴仑
Original assignee: Xi'an Equipment & Materials Inst Of China Railway Communication & Sign Gen Cor
Current assignee: Xi'an Equipment & Materials Inst Of China Railway Communication & Sign Gen Cor
Priority date: 1995-04-07
Filing date: 1995-04-07
Publication date: 1996-12-18
Anticipated expiration: 2005-04-07

Abstract

The utility model relates to an anti-thunder transformer which is particular suitable for microelectronic devices, relating to the anti-thunder technology of transformers. The utility model is characterized in that the framework has a coaxial composite structure with internal and external nestification; the coil curl has a full-symmetry composite shielding structure which is formed by that a plurality of layers of conductive foil and windings are connected in series and parallel; the conductive foil is insulated by medium; the outer part of the transformer is covered with a housing made from permeability magnetic material to form electromagnetic shielding. The utility model solves the problem that an insulating transformer and an anti-thunder element are usually assembled to prevent thunder, but the anti-thunder element is easy to be ineffective. The transformer stresses the anti-thunder ability of devices. The utility model has favorable anti-thunder performance, complete function and less energy consumption, and can suppress the longitudinal over voltage.

Description

Lightning protection transformer

The utility model lightning protection transformer relates to transformer lightning protection power technology, is a kind of lightning protection transformer that is specially adapted to microelectronic device.

A kind of lightning protection transformer is disclosed in the patent No. is 91215981.2 Chinese patent; it mainly is made of jointly insulating transformer and lightning protection component; though obtained some lightning protection effects; but mainly be buffer action; fail to tackle the problem at its root, particularly fail to solve overvoltage protection problem between line.

The purpose of this utility model is a kind of lightning protection transformer of design, and it has than HI high impact insulation resistance energy, keeps higher surge voltage transfer ratio, and has superpotential ability between certain weakened line.

The purpose of this utility model can realize in the following manner.

The iron core of transformer is constant, and designing its skeleton is coaxial inside and outside nested combining structure, and coil is conductive foil and winding multilayer series and parallel holohedral symmetry composite shielding structure.

Its skeleton is two, and shape is identical, sectional area is different, and inner frame and outer skeleton can coaxial nesting type structures;

The structure of its pitch of the laps is as follows: ground connection conductive foil 3 and winding head end conductive foil 4 alternating layers around, and every layer of conductive foil 4 constitutes winding inner shield combination all the time between two-layer ground connection conductive foil 3; Equally, ground connection conductive foil 6 and winding tail end conductive foil 7 alternating layers around, every layer of conductive foil 7 between two-layer ground connection conductive foil 6, constitutes winding external shield combination all the time; By the medium mutually insulated, winding 5 is between inside and outside shielding combination between every layer of conductive foil, and its head end 9 is connected to a C with conductive foil 4, and its tail end 10 is connected to a D with conductive foil 7, and ground connection

conductive foil

3,6 is drawn ground connection by end A, B respectively;

The transformer outside is covered with the permeability magnetic material shielding case.

When it is ED type transformer, single line bag skeleton is coaxial inside and outside nested combining structure, it adopts the coil of conductive foil and winding multilayer series and parallel holohedral symmetry composite shielding structure, can be primary and secondary two coils, also coil only, be holohedral symmetry composite shielding structure, another coil is the structure of prior art.

When it was CD type transformer, each skeleton of two-wire bag was coaxial inside and outside nested combining structure, and its coil still is conductive foil and winding multilayer series and parallel holohedral symmetry composite shielding structure, and coil turn is shared by two line bags.

The utlity model has following major advantage: by forming electrostatic screen between ground connection conductive foil and winding, it between the conductive foil electric capacity shielding, this structure has constituted composite shielding, and adopt the shell of permeability magnetic material to constitute electromagnetic shielding, transformer is under composite shielding and electromagnetic shielding action, and lightning protection function is more complete, better performances, the ability that suppresses transverse over voltage is arranged, and low energy consumption.1. impulse withstand voltage insulation: 1.2/50 μ ε surge voltage ripple, greater than 12KV; 2. surge voltage transfer ratio (vertically): 1.2/50 μ ε surge voltage ripple, less than 1/800; 3. transverse over voltage decay: 1.2/500 μ ε ripple, greater than the ratio of input with the output of 50:(surge voltage); 4. impact impedance symmetry: in the transmission of impacts of the capable ripple of induction lightening (overvoltage impact longitudinally), therefore the difference of the impact impedance of device self produces overvoltage between x wire; 5. the electrical characteristic of former transformer obtains bigger improvement: reduced the loss of no-load current, increased load capacity, improved efficient.In addition, the coil of single holohedral symmetry composite shielding structure also can constitute overvoltage protector.

The utility model is described in further detail below in conjunction with drawings and Examples.

Figure 1A is an embodiment skeleton structure schematic diagram (inner frame is for stretching out the position among the figure), and Figure 1B is a line bag A-A cutaway view.1-inner frame among the figure, the outer skeleton of 2-, 3,6-ground connection conductive foil, 5-coil windings, 4-winding head end conductive foil, 7-winding tail end conductive foil, 8-iron core, C, the D-winding contact of drawing in parallel, A, B-conductive foil ground connection exit with conductive foil;

Fig. 2 is the equivalent circuit theory figure of embodiment with ED type transformer.

Two cubes of identical cylindricality skeletons 1 of cross section difformity in the present embodiment, 2, its inner frame 1 is nested in the outer skeleton 2, iron core 8 is inserted in the inner frame 1, ground connection conductive foil 3 is on the skeleton wall, it is around with head end conductive foil 4, conductive foil 4 outer solderless wrapped connection again ground conductive foils 3, two-layer ground connection conductive foil 3 is drawn ground connection at middle part A end, constitute the inner shield combination thus, conductive foil 4 is drawn with the head end 9 of winding 5 by the C point and is connect, the outermost layer of winding 5 is wound with ground connection conductive foil 6, and it is around with tail end conductive foil 7, conductive foil 7 outer solderless wrapped connection again ground conductive foils 6, two-layer ground connection conductive foil 6 is drawn ground connection at middle part B end, constitute the external shield combination thus, conductive foil 7 is drawn in parallel with the tail end 10 of winding 5 by the D point,

conductive foil

3 and 4, between 6 and 7 each layers by the medium mutual insulating.Transformer body shields with iron-clad, and each earth connection reliably is connected with shell in a bit, eliminates the influence of outside induction, interference and spuious distribution.

If CD type transformer, each skeleton of its two-wire bag is coaxial inside and outside nested combining structure, its coil still is conductive foil and winding multilayer series and parallel holohedral symmetry composite shielding structure, coil turn is shared by two line bags, and the outside higher metal tape (as glass Mo alloy) of magnetic property of using of its iron core and line bag is around wrapping ground connection.

Claims

1, a kind of lightning protection transformer comprises iron core, skeleton, primary and secondary coil, it is characterized in that skeleton is coaxial inside and outside nested combining structure, and coil is conductive foil and winding multilayer series and parallel holohedral symmetry composite shielding structure;

The structure of its pitch of the laps is as follows: ground connection conductive foil (3) and winding head end conductive foil (4) alternating layer around, and every layer of conductive foil (4) be positioned between the two-layer ground connection conductive foil (3) all the time, constitutes winding inner shield combination; Equally, ground connection conductive foil (6) and winding tail end conductive foil (7) alternating layer around, every layer of conductive foil (7) is positioned between the two-layer ground connection conductive foil (6) all the time, constitutes winding external shield combination; Between every layer of conductive foil by the medium mutually insulated, winding (5) is between inside and outside shielding combination, its head end (9) is connected to point (C) with conductive foil (4), and its tail end (10) is connected to point (D) with conductive foil (7), draws ground connection by end (A, B) respectively by ground conductive foil (3,6);

2, lightning protection transformer according to claim 1, it is characterized in that: when it is ED type transformer, single line bag skeleton is coaxial inside and outside nested combining structure, it adopts the coil of conductive foil and winding multilayer series and parallel holohedral symmetry composite shielding structure, can be primary and secondary two coils, also only a coil is a holohedral symmetry composite shielding structure, and another coil is the structure of prior art.

3, lightning protection transformer according to claim 1, it is characterized in that: when it is CD type transformer, each skeleton of two-wire bag is coaxial inside and outside nested combining structure, its coil still is conductive foil and winding multilayer series and parallel holohedral symmetry composite shielding structure, and coil turn is shared by two line bags.

4, lightning protection transformer according to claim 1 is characterized in that: each interlayer of ground connection conductive foil (3,6) is drawn by the middle part and is joined, and the end that joins thus (A, B) bonding.