CN201397734Y

CN201397734Y - Multi-split rectifier transformer

Info

Publication number: CN201397734Y
Application number: CN2009200353741U
Authority: CN
Inventors: 张凌芳
Original assignee: CHANGZHOU SPECIAL TRANSFORMER Co Ltd
Current assignee: CHANGZHOU SPECIAL TRANSFORMER Co Ltd
Priority date: 2009-03-16
Filing date: 2009-03-16
Publication date: 2010-02-03
Anticipated expiration: 2019-03-16

Abstract

The utility model relates to a multi-split rectifier transformer which comprises a transformer primary winding and three groups of secondary windings which form a coil and are radially and axially split simultaneously; positions occupied by the three groups of secondary windings in a leakage magnetic field are equal to each other and the coil formed by the winding of the secondary windings are thesame with the transformer primary winding in axial height; the transformer primary winding is arranged outside the secondary windings and is arranged in a coaxial manner with the secondary windings.In the structure of the transformer, the three groups of secondary windings are simplified into a winding; the impedance of the primary winding to each group of secondary winding is nearly equal, thusbeing applicable to carrying load simultaneously; simultaneously, as the axial height of the primary winding is the same with that of the secondary windings, ampere-turns are balanced, thus also applicable to carrying load individually, making up the defect of the current three- split rectifier transformer, causing the transformer to ensure that the deviation of impedance between the three groupsof secondary windings is less than 0.5 percent; voltage tolerance is less than 0.2 percent; and no risk is brought to the safe use of the transformer.

Description

Many cracking formula rectifier transformer

Technical field

The utility model belongs to field transformer, is a kind of many cracking formula rectifier transformer.

Background technology

Three cracking formula rectifier transformers of AC/AC (alternating current) variable-frequency system generally are used for the roll equipment of steel mill; Require three groups of deviations between the secondary impedance less than 0.5%, voltage deviation is less than 0.2%, and there is certain drawback in structure commonly used now:

1) three groups of radial divisions of secondary winding, insulation system complexity, impedance deviation are difficult to guarantee, have circulation during parallel running, cause local overheated the breaking down of transformer;

2) three groups of secondary winding axial splits, impedance easily reaches unanimity, but requires three groups of secondary winding bringing onto load simultaneously, and transformer ampere-turn imbalance had constituted danger to the fail safe of transformer when band carried separately.

Summary of the invention

Problem to be solved in the utility model is: there is drawback in existing three cracking formula rectifier transformer structures, need a kind of instructions for use of satisfying, and transformer can be with simultaneously carry, again can be separately with many cracking rectifier transformer of the safety and stability of carrying.

The technical solution of the utility model is: many cracking formula rectifier transformer, comprise winding of transformer and three groups of secondary winding, three groups of secondary winding turn to a coil, radial, axial split of while, three groups of secondary winding occupy equal in stray field, axis of winding height of coil that turns to and transformer is consistent, and winding of transformer is placed on the secondary winding outside, and primary and secondary winding concentric type is arranged.

Three groups of secondary winding of the utility model turn to a coil, structurally not only have radial division but also have axial split, and are independent separately on electric, guarantee that by the technology that repeatedly replaces three groups of secondary winding occupy equal in stray field.The utility model structurally is simplified to a winding with three groups of secondary winding, look the same with common two winding transformer, one time winding equates the impedance of every group of secondary winding is approaching, be suitable for being with simultaneously and carry, simultaneously, because one time winding, secondary winding axial height equate, ampere-turn equilibrium, also being suitable for separately, band carries, remedied the deficiency of existing three cracking formula rectifier transformers, make transformer satisfy deviation between three groups of secondary winding impedances less than 0.5%, voltage deviation can't bring hidden danger to the safe handling of transformer less than 0.2%.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the schematic diagram of the utility model winding connection.

Embodiment

As Fig. 1, the utility model comprises winding G of transformer and three groups of secondary winding O, P, Q, three groups of secondary winding O, P, Q carry out radial, axial split simultaneously, turn to a coil, it is equal to guarantee that by the technology that repeatedly replaces three groups of secondary winding O, P, Q occupy in stray field, and a winding G of coil that turns to and transformer axial height is consistent, and winding G of transformer is a delta connection, be placed on the secondary winding outside, primary and secondary winding concentric type is arranged.

Figure 2 shows that the winding diagram of winding G and three groups of secondary winding O, P, Q.A1, b1, c1, a2, b2, c2, a3, b3, c3 are respectively the outlet terminal of three groups of secondary winding O, P, Q, A, B, C are the outlet terminal of a winding G.Winding G has the function of regulating voltage ripple of power network, the outlet terminal A of a winding G, and B, C inserts three-phase electrical power system, and secondary outlet terminal a1, b1, c1, a2, b2, c2, a3, b3, c3 insert subscriber equipment after by rectifying device.

Claims

1, many cracking formula rectifier transformer, comprise winding of transformer and three groups of secondary winding, it is characterized in that three groups of secondary winding turn to a coil, simultaneously radial, axial split, three groups of secondary winding occupy equal in stray field, axis of winding height of coil that turns to and transformer is consistent, winding of transformer is placed on the secondary winding outside, and primary and secondary winding concentric type is arranged.

2, many cracking formula rectifier transformer according to claim 1 is characterized in that winding of transformer is a delta connection, and the outlet terminal of a winding inserts three-phase electrical power system, and the outlet terminal of secondary winding inserts subscriber equipment after by rectifying device.