CN200950381Y

CN200950381Y - Three-phase transformer opening wound core

Info

Publication number: CN200950381Y
Application number: CN 200620107407
Authority: CN
Inventors: 杨滨霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-05
Filing date: 2006-09-05
Publication date: 2007-09-19
Anticipated expiration: 2016-09-05

Abstract

A three-phase transformer open-coil iron core can simplify the manufacturing process, improve the efficiency and save the cost without annealing treatment. The utility model is a ''star'' shape structure including a round-corner external rectangular frame (1) and two round-corner internal rectangular frames (2). The cross section of the two lateral columns and the central column of the iron core is ladder-shaped round, ladder-shaped oval or ladder-shaped long round. The utility model is characterized in that the external rectangular frame has one or two joints; the internal rectangular frame has one joint; and the bending radius of four corners on the inner side of the internal rectangular frame (2) is more than or equal to 60mm. The utility model is applicable to coil winding for the three-phase transformer.

Description

Open wound iron core of three-phase transformer

Technical field

The utility model relates to transformer core, and particularly the three-phase transformer volume is unshakable in one's determination.

Background technology

In existing power transformer manufacturing technology, the core construction of three-phase flat surface transformer has that the plane is stacked, two kinds of plane volume core types.

The plane volume iron core of existing product is generally based on the structure of remaining silent, and its schematic diagram is seen Fig. 1, and it is made up of an outer rectangle frame a and two interior rectangle frame b Type constitutes: owing to be the volume iron core of remaining silent, its coil must be by the coiling on iron core of special-purpose coil winding machine, so processed complex, coil winding speed are slow, the iron end of up-coiler gear wear falls into coil easily during coiling simultaneously, cause quality accident: besides, the bending radius r is generally less than 20mm in unshakable in one's determination, and iron core is increased at bending part stress, and magnetic domain is arranged destroyed, iron core must eliminate stress by annealing, and annealing unshakable in one's determination complex process not only, and the time is long, has increased cost.

Summary of the invention

The utility model will solve present transformer core needs annealed processing to cause complex process, long processing time, problem that manufacturing cost is high, a kind of Open wound iron core of three-phase transformer of the present utility model is provided for this reason, this volume iron core need not annealing in process, coil winding is convenient on the iron core, and the product price ratio is higher.

For solving problem, the technical solution adopted in the utility model is made up of rectangle frame in the outer rectangle frame of a fillet and two fillets

Type constitutes, these iron core two side columns and centre pillar cross-section are a kind of of Step Circular, ladder ellipse, ladder Long Circle, its special character is: the seam crossing of described outer rectangle frame is one or two, the seam crossing of rectangle frame is one in described, the inboard four bight radius bend r 〉=60mm of interior rectangle frame.

Preferably described outer rectangle frame of the utility model and interior rectangle frame become a circulation group in described seam crossing by the butt joint of 2～6 laminations fissure of displacement successively.

Two side columns in the utility model and centre pillar cross-section are a kind of of Step Circular, ladder ellipse, ladder Long Circle, and promptly the cross section envelope is circular, ellipse or Long Circle.Cross section structure like this is that the mutual stack of lamination stack layer by different in width constitutes, and some lamination width are identical in the lamination stack layer.

Described seam crossing becomes a circulation group by the butt joint of 2～6 laminations fissure of displacement successively, for example seam crossing becomes a circulation group by the butt joint of 5 laminations fissure of displacement successively, group inner iron core sheet is superimposed with each other towards the direction fissure of displacement successively, another in succession circulation group inner iron core sheet is superimposed with each other also towards the direction fissure of displacement successively, and some circulation group inner iron core sheet fissure of displacement structures are identical; All circulation combinations one herein form a described seam crossing.Unshakable in one's determination can disassemble at seam crossing, can restore by former fissure of displacement butt joint again behind the disassemble.

The utility model is owing to the inboard four bight radius bend r 〉=60mm of interior rectangle frame, so lamination bending part stress is little, crystalline structure is constant, and unshakable in one's determination the making need not annealing in process, can simplify production process, improves work efficiency, saves cost.The utility model is made transformer coil and is used in transformer transformer noload losses is reduced; According to existing theory and experience, no-load loss only increases by 1% when the lamination bending radius is 100mm, no-load loss increased by 5% when bending radius was 75mm, so when the inboard of interior rectangle frame four bight radius bend r 〉=60mm, whole no-load loss only differs less than 1%.

Figure of description

Fig. 1 be commonly use three-phase transformer remain silent the volume planar structure schematic diagram unshakable in one's determination;

Fig. 2 is the utility model one routine Open wound iron core of three-phase transformer planar structure schematic diagram;

Fig. 3 is Fig. 2 A-A cross-sectional schematic;

Fig. 4 is an I place enlarged diagram among Fig. 2;

Fig. 5 is the another routine Open wound iron core of three-phase transformer planar structure schematic diagram of the utility model.

Embodiment

Open wound iron core of three-phase transformer shows as Fig. 2, Fig. 3, is made up of an outer rectangle frame 1 and two interior rectangle frames 2

Type constitutes, and two side columns unshakable in one's determination and centre pillar cross-section are Step Circular, and the seam crossing of outer rectangle frame is one, and the seam crossing of interior rectangle frame is one, the inboard four bight radius bend r 〉=60mm of interior rectangle frame; Outer outer rectangular frame side frame four bight radius bend R=r+H, H is the superimposed thickness summation of inside and outside rectangle frame lamination; Outer rectangle frame and interior rectangle frame become a circulation group in described seam crossing by the butt joint of 5 laminations fissure of displacement successively, show as Fig. 4.

Processing method of the present utility model is: 1. determine lamination quantity in the width of each lamination stack layer c, d, e and the stack layer by designing requirement, cut lamination; 2. folded respectively outer rectangle frame 1 of system and interior rectangle frame 2, when dressing up iron core, maintainance set reaches interior, that interior rectangle frame is synthetic its cross section of center pillar as shown in Figure 3 by the synthetic lateral column of inside and outside rectangle frame, be lamination stack layer c, d, the e of different in width ... constitute Step Circular, inside and outside rectangle frame seam crossing as shown in Figure 4, be the butt joints of

lamination

11,12,13,14,15 fissure of displacement, form a circulation group; 3. inside and outside rectangle frame suit, colligation, fixing identical with prior art.Before suit coil, take the seam crossing of internal and external frames apart, package back rearrangement seam and make it as excellent as before, hold fixedly binding strap again.

The another execution mode of the utility model as shown in Figure 5, outer rectangle frame has two seam crossings, other structure is with above-mentioned identical.

Emphasis of the present invention just is: the three-phase transformer volume is unshakable in one's determination to be made up of three rectangle frames, the inside bend radius 〉=60mm of rectangle frame in it.

So, all three-phase transformer volume iron cores of forming by three rectangle frames, the scope that all belongs to the utility model protection of the inside bend radius 〉=60mm of rectangle frame in it.

Claims

1, Open wound iron core of three-phase transformer, forming "  " type by the outer rectangle frame (1) of a fillet and two interior rectangle frames (2) of fillet constitutes, these iron core two side columns and centre pillar cross-section are a kind of of Step Circular, ladder ellipse, ladder Long Circle, it is characterized in that: the seam crossing of described outer rectangle frame is one or two, the seam crossing of rectangle frame is one in described, the inboard four bight radius bend r 〉=60mm of interior rectangle frame (2).

2, Open wound iron core of three-phase transformer as claimed in claim 1 is characterized in that described outer rectangle frame and interior rectangle frame become a circulation group in described seam crossing by the butt joint of 2～6 laminations fissure of displacement successively.