CN2515776Y

CN2515776Y - Iron core of triangular three-phase transformer

Info

Publication number: CN2515776Y
Application number: CN 01205470
Authority: CN
Inventors: 程永生
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-11
Filing date: 2001-01-11
Publication date: 2002-10-09
Anticipated expiration: 2011-01-11

Abstract

The utility model relates to an iron core of a three-phase power transformer, which is composed of iron posts (1) and iron yokes (2). Three iron posts of the iron core are positioned on the three vertices of an equilateral triangle. Same as a general transformer, the iron posts and iron yokes are composed by alternately overlapped iron sheets with the shape and size of the iron posts keeping unchanged. The iron yokes include six parts, three parts for upper and lower ends respectively, each of which takes the shape in one section of a cycle arc and has the section area of only half of a section area of the iron post. Three parts of iron yokes of each end are connected with three iron posts respectively to form the whole iron core.

Description

Atria phase transformer iron core

The new form and name of this practicality is " an Atria phase transformer iron core ", and it is applicable to three-phase power transformer.

Up to the present, the three-phase power transformer that uses in the electric power system, from old-fashioned SJ type to up-to-the-minute S9 type, just the material and the thickness of lamination change, and the fit of iron plate is identical, and iron prop and iron yoke all are alternately to overlap mutually with lamination to form, 3 iron props and 4 part iron yokes are arranged, and mounting coil is seen Fig. 1 on iron prop, wherein: (a) be stereogram, (b) be vertical view, label: 1 iron prop, 2 iron yokes, 3 coils, A-A are the sectional drawing of iron yoke.3 iron props of this iron core are centered close on the straight line, and the distance between the iron prop is L, and the iron core height is H, window size is h * l, and the basal area of iron yoke equates that with the basal area of iron prop iron yoke volume is bigger, the iron plate consumption is more, and magnetic circuit is long asymmetric again.For the ease of comparing, we call common transformer to this transformer.

The sixties, China manufactured experimently a kind of " involute iron core " transformer, the iron yoke of this involute iron core is to make with the banded lamination continuous reeling of rolling, iron prop is to form with the lamination plug-in mounting pressing of the involute shape of shaping in advance, on 3 summits that are centered close to an equilateral triangle of 3 iron props, mounting coil is on iron prop, iron yoke and iron prop are fixedly clamped with long bolt, see Fig. 2, wherein: (a) be stereogram, (b) be the iron prop sectional drawing, label 1 iron prop, 2 iron yokes, 3 coils.This iron core is littler than common transformer core volume, and weight is lighter, but manufacturing process is complicated, and the alternately overlapping of the iron plate of iron prop and iron yoke, and a tangible contact-making surface is arranged, and magnetic resistance increases, and influences the magnetic flux process, easily produces hum.This transformer seldom uses, and does not produce basically, just introduces to some extent on the book.

The utility model is exactly that the iron core of common transformer is made into triangle iron core, three iron prop centers of this iron core also are to be positioned on three summits of an equilateral triangle, iron prop is the same with common transformer with the iron yoke, replacing overlapping by iron plate constitutes, the shape and size of iron prop are constant, and the iron yoke is totally 6 parts, up and down each 3 part of two ends, every partial shape is one section circular arc, its basal area has only half of iron prop basal area, and 3 part iron yokes of each end are connected with 3 iron props respectively mutually, see Fig. 3, wherein: (a) be stereogram, (b) be vertical view, label: 1 iron prop, 2 iron yokes, 3 coils, B-B are iron yoke sectional drawing.Still keeping the distance between the iron prop is L, and the iron core height is H, and window size is also constant, still is l * h, does not influence coil and installs.Fig. 3 and Fig. 1, Fig. 2 are compared, and as can be seen: the volume ratio common transformer of triangle iron core iron yoke part approximately reduces 1/4, and it possesses the advantage of common transformer iron core and involute iron core iron core, and has avoided the shortcoming of the two.

Triangle iron core has following advantages:

1, iron yoke partial volume approximately reduces 1/4, saves material, and production cost reduces.

2, the basal area of every part iron yoke reduces half, but total basal area does not have minimizing, does not influence the main flux of transformer.

3, more energy-conservation than S9 type transformer.The most energy-conservation transformer is the S9 type at present, and this is the product that country promotes.Make triangle iron core with the core material of S9 type equally, volume can reduce 7～10%, and iron core weight and iron loss also can reduce by 7～10% accordingly.

4, the three-dimensional position of three-phase iron prop and iron yoke becomes the central shaft symmetry, therefore three-phase magnetic circuit is also symmetrical fully, and the average distance of magnetic circuit shortens, and the middle close together to the both sides phase of common transformer iron core, distance between the phase of both sides is longer, and average distance is longer than triangle iron core.If be used for making threephase potential transformer, accuracy class is higher.

5, three-phase coil position symmetry, with limit difference mutually, as long as the threephase load balance, the temperature rise of three-phase coil is not exactly consistent in not existing.

6, only be that core structure changes, the material of lamination is constant, so long as the iron core that iron plate changes no matter amount of capacity can both be made triangle iron core, is made simple.Every basic theories and manufacturing process about transformer all are equally applicable to the transformer of triangle iron core.Iron core laminate patch schematic diagram is seen Fig. 4, wherein: 1 iron prop laminate patch, 2 iron yoke laminate patches.

7, because of core structure changes, the design principle of pressing common transformer is also done triangularity to fuel tank, and the transformer general illustration is seen Fig. 5, wherein: 1 iron prop, 2 iron yokes, 3 coils, 4 high-voltage terminal sleeve pipes, 5 low pressure outlet sleeve pipes, 6 tap changers, 7 conservators, 8 fuel tanks, 9 radiators.The fuel tank volume of the volume ratio common transformer of triangle fuel tank is approximately little by about 7%, and core volume reduces in addition, and the weight of whole transformer will alleviate 7～10%

Atria phase transformer iron core can address the problem: 1, reduce core volume, thereby weight reduction reduces the iron plate consumption, economical with materials.2, reduce iron loss.Transformer is in fortune, and iron loss exists all the time, consumes certain power for a long time, reduces iron loss, just can save electric energy.3, make three-phase magnetic circuit symmetry fully, help improving the quality of electric energy.

Further specify below in conjunction with Figure of description diabolo three-phase transformer iron core:

Fig. 1 is the iron core of common transformer, wherein (a) is stereogram, (b) be vertical view, label 1 iron prop, 2 iron yokes, 3 coils, being centered close on the straight line of three iron props, centre distance between the iron prop is L, window size is l * h, and the iron yoke has 4 parts, up and down each two parts, A-A is the sectional drawing of iron yoke, and its basal area is identical with the basal area of iron prop.In the centre-to-centre spacing between mutually is L to both sides mutually, the centre-to-centre spacing of both sides between mutually is 2L, so the varying length of the magnetic circuit between the three-phase.

Fig. 2 is the involute iron core, and wherein (a) is stereogram, (b) is the sectional drawing of iron prop, label 1 iron prop, 2 iron yokes, 3 coils.On three summits that are centered close to an equilateral triangle of three iron props, the iron yoke is to make with the banded lamination continuous reeling of rolling, and iron yoke and iron prop are fixedly clamped with screw rod.This iron core has a tangible interface between iron prop and iron yoke, magnetic resistance is increased, and influences the magnetic line of force and passes through, and easily produces hum, and the manufacturing process complexity.

Fig. 3 is an Atria phase transformer iron core, and wherein (a) is stereogram, (b) is vertical view, label 1 iron prop, 2 iron yokes, 3 coils.On three summits that are centered close to an equilateral triangle of three iron props, the centre distance between three iron props is L, and window size is identical with the common transformer iron core, does not influence coil and installs.The iron yoke has 6 partly, and every part is one section circular arc, and B-B is the sectional drawing of iron yoke, and its basal area has only half of iron prop basal area, the three-phase magnetic circuit symmetry, and magnetic circuit is shorter.

Fig. 4 is the laminate patch schematic diagram of triangular form three-phase transformer iron core.Label 1 iron prop laminate patch, 2 iron yoke laminate patches.The laminate patch of iron prop is identical with common transformer, and the laminate patch of iron yoke is curved circular arc, and two kinds of laminate patches alternately overlap.The advantage that this iron core has common transformer iron core and an involute iron core has been avoided the shortcoming of the two.

Fig. 5 is an Atria phase transformer general illustration.Label: 1 iron prop, 2 yoke yokes, 3 coils, 4 high-voltage terminal sleeve pipes, 5 low pressure outlet sleeve pipes, 6 tap changers, 7 conservators, 8 fuel tanks, 9 radiators.Because of after transformer core does triangularity, fuel tank is also done triangularity, and the installation site of all devices will rearrange on the fuel tank, should conform with the rules requirement of the parties concerned.The triangle fuel tank is more suitable in three coil transformers the outlet sleeve pipe being installed.

Claims

1, a kind of Atria phase transformer iron core is made of iron prop 1 and iron yoke 2, it is characterized in that: iron prop has 3, and the iron yoke has 6 parts, up and down each 3 part of two ends, 3 part iron yokes of each end are connected to each other with 3 iron props respectively, constitute whole iron core, and coil 3 is sleeved on the iron prop.

2, triangle transformer core according to claim 1 is characterized in that: 3 iron props are positioned on 3 summits of an equilateral triangle, and the structure of iron prop is identical with the iron prop of common transformer with overall dimension, the iron plate of iron prop and iron yoke alternately overlaps mutually, does not have tangible interface.Being shaped as one section circular arc or being similar to one section circular arc of iron yoke, the basal area of iron yoke has only half of iron prop basal area.