CN203338917U - Transformer with split windings - Google Patents

Transformer with split windings Download PDF

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Publication number
CN203338917U
CN203338917U CN201320154712XU CN201320154712U CN203338917U CN 203338917 U CN203338917 U CN 203338917U CN 201320154712X U CN201320154712X U CN 201320154712XU CN 201320154712 U CN201320154712 U CN 201320154712U CN 203338917 U CN203338917 U CN 203338917U
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China
Prior art keywords
winding
yoke
transformer
split
low pressure
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CN201320154712XU
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Inventor
张晓峰
张恬
潘甲龙
兰洋
王静
刘佰强
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TBEA Xinjiang Sunoasis Co Ltd
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TBEA Xinjiang Sunoasis Co Ltd
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Abstract

The utility model discloses a transformer with split windings. The transformer comprises an iron core, the high-voltage windings and the low-voltage windings, wherein the high-voltage windings and the low-voltage windings are wound on the iron core. The iron core comprises an upper yoke, a lower yoke and magnetic columns, wherein the upper yoke and the lower yoke are structural elements capable of generating a magnetic line closed loop, the magnetic columns are connected between the upper yoke and the lower yoke and are two or more in number, each magnetic column is wound with one high-voltage winding and one low-voltage winding, each high-voltage winding and each corresponding low-voltage winding are nested, the high-voltage windings are arranged on the outer layers of the magnetic columns and the low-voltage windings are arranged on the inner layers of the magnetic columns. According to the transformer with the split windings, the problems that the height of an axial split winding transformer is exceedingly large, parameters of axial split low-voltage windings are different, capacitance and current are large and impedance is unbalanced are solved, and therefore stability of the system and excitation efficiency are improve, and transportation and usage are facilitated.

Description

A kind of transformer with split winding
Technical field
The utility model relates to transformer technology, particularly a kind of transformer with split winding.
Background technology
Dual low voltage transformer refers to every many winding power transformers that consist of a high pressure winding and two or more low pressure winding.Wherein, the capacity of low pressure winding is identical, rated voltage equates or approach, can isolated operation or parallel running, can bear identical or different load.When the load connected on some low pressure windings or power supply break down, all the other low pressure windings still can normally move.Therefore transformer with split winding has the effect of limiting short-circuit current when fault.
Transformer with split winding with two division windings is called as two transformer with split windings.Two transformer with split windings are widely used in the grid-connected power station of large-sized photovoltaic.For example, in design, during electricity generation system, usually, according to two transformer with split windings of ripe typing on market, 1MW is decided to be to a generator unit, and the inverter that two 500KW are set shares the boost subsystem of an electricity generation system of formation of two transformer with split windings.Except adopting two transformer with split windings, also can design electricity generation system according to the many transformer with split windings with two above splitting non-zero branch that can provide on market, electricity generation system just can further be optimized like this.Adopt many transformer with split windings to design electricity generation system, can reduce the electricity generation system loop, the simplification system, and reduce system loss, and increase energy output, greatly reduce the consumption of high-tension cable simultaneously.The various relevant corollary equipments such as high-tension line, transformer and protection equipment also are reduced thereupon and simplify, thereby can reduce investment outlay, and raise the efficiency.
Generally adopt two kinds of technology of radial division and axial split in existing many transformer with split windings.Adopt the structure of the transformer with split winding of axial manner to be: low pressure winding and the nested setting of high pressure winding ectonexine, the high pressure winding is layer outside, and the low pressure winding is at internal layer, and the coil diameter of a plurality of low pressure windings is identical, and superposes and arrange successively vertically.Adopt the structure of the transformer with split winding of radial mode to be: high pressure winding and a plurality of low pressure windings are according to the nested setting of order ectonexine from outside to inside, the high pressure winding is at outermost layer, and a plurality of low pressure windings of internal layer are also nested settings.
For the transformer with split winding that adopts axial manner, because a plurality of low pressure windings superpose and arrange successively vertically, make the height of whole transformer with split winding increase, be inconvenient to transport and use.In addition, after the division of low pressure axis of winding, increase widely high pressure winding and low pressure and respectively divide the short-circuit impedance between winding, the increase of impedance makes the Efficiency Decreasing of whole transformer.
For the transformer with split winding that adopts radial mode, along with increasing of division winding, make the high pressure winding from the distance of iron core more and more away from, so excitation efficiency decrease; In addition, the capacitance current between the low pressure winding will increase, and impedance is difficult to guarantee equilibrium, the reduction of whole system stability; A plurality of low pressure windings arrange according to inside and outside nested mode, the diameter difference of each low pressure winding, therefore be difficult to guarantee that two groups or more low pressure winding parameter is consistent, and meet the insulating requirements of high-low pressure winding coil, also make transformer with split winding easily by large short circuit current, be destroyed its thermal stability and dynamic stability when overloading even short circuit; Simultaneously, for many transformer with split windings, because the inside and outside nested number of plies is more, the inner coil maintenance difficulty is also very large.
The utility model content
The utility model provides a kind of transformer with split winding, for solving prior art axially transformer with split winding excessive height and the unsettled problem of radial transformer with split winding mesolow winding parameter system inconsistent, that capacitance current is large and impedance is unbalanced caused.
In order to realize above-mentioned utility model purpose, the utility model embodiment provides a kind of transformer with split winding, and described transformer with split winding comprises iron core, and is wrapped in high pressure winding and low pressure winding on described iron core;
Described iron core comprises yoke, lower yoke and magnetic post; Wherein going up yoke and lower yoke is the structural member that can produce magnetic line of force closed-loop path, and the magnetic post is connected between yoke and lower yoke; The number of magnetic post is two or more;
All be wound with high pressure winding and low pressure winding on each magnetic post, and described high pressure winding and the nested setting of low pressure winding ectonexine, the high pressure winding is arranged on skin, the low pressure winding is arranged on internal layer.
Preferably, described upper yoke and lower yoke are annular structural part.
Preferably, described magnetic post circumferentially being uniformly distributed along described upper yoke and lower yoke.
Preferably, described upper yoke and lower yoke are the regular polygon structural member.
Preferably, described magnetic post, upper yoke and lower yoke form jointless overall structure.
Preferably, each high pressure winding is connected in parallel;
The winding leads that each low pressure winding passes through separately respectively is connected with load, and the winding leads of described low pressure winding is by the Base top contact of winding.
Preferably, the integral multiple that the number of described magnetic post is 3.
Preferably, the number of described magnetic post is 6,9 or 12.
Preferably, described upper yoke, lower yoke and a plurality of magnetic post are rolled up and are bundled into shape by cold-reduced silicon sheet.
Preferably, the thickness of described cold-reduced silicon sheet is 0.3mm.
Preferably, described lower yoke and a plurality of magnetic post are by removing the resulting overall structure of excess stock.Described upper yoke, after described magnetic post is wound around winding, is fixed on described magnetic post, and forms jointless overall structure with lower yoke and a plurality of magnetic post.
In the utility model embodiment, the iron core of transformer with split winding comprises yoke, lower yoke and a plurality of magnetic post, the magnetic post is connected between yoke and lower yoke, the part of each magnetic post and upper yoke and lower yoke can form flux loop, be wound with high pressure winding and low pressure winding on the magnetic post, by the excitation effect, the high pressure winding excites induced current in the low pressure winding, thereby realize that high pressure arrives the conversion of low pressure, by high pressure winding and the low pressure winding be wound around respectively on a plurality of magnetic posts, realized a kind of transformer with split winding of function admirable.Concrete, the transformer with split winding provided for the utility model embodiment has following beneficial effect:
One, because each low pressure winding is separately positioned on each magnetic post, thereby avoided in existing axial split transformer, arrange the problem of the height increase that makes transformer with split winding because a plurality of low pressure windings superpose vertically successively, thereby facilitated transportation and the use of transformer with split winding;
Two, because each low pressure winding is separately positioned on each magnetic post, with respect to existing radial transformer with split winding, on the one hand, the transformer with split winding that the utility model embodiment provides can guarantee that the parameter of each low pressure winding is in full accord, thereby meets the insulating requirements of transformer with split winding, and has thermal stability and dynamic stability preferably, on the other hand, capacitance current between the low pressure winding will reduce, and make between impedance and easily reach balanced, improve the stability of whole system;
Three, on each magnetic post, only be wound with one group of high pressure winding and low pressure winding, avoided in existing radial transformer with split winding the problem of the excitation efficiency decrease that causes from the hypertelorism of iron core due to the high pressure winding, the transformer with split winding provided for the utility model embodiment, even in the situation that the division winding is more, also can guarantee the close together of high pressure winding distance Iron core, thereby improve excitation efficiency;
In the transformer with split winding that four, the utility model embodiment provides, can reduce high pressure winding and low pressure and respectively divide the short-circuit impedance between winding, the efficiency that reduces to improve whole transformer with split winding of impedance.
The accompanying drawing explanation
The three-dimensional structure diagram of the transformer with split winding that Fig. 1 provides for the utility model embodiment;
The vertical view of the transformer with split winding that Fig. 2 provides for the utility model embodiment;
The structural representation that Fig. 3 is iron core 100 in transformer with split winding;
The structural representation of the another kind of transformer with split winding that Fig. 4 provides for the utility model embodiment.
Embodiment
For making those skilled in the art understand better the technical solution of the utility model, transformer with split winding the utility model embodiment provided below in conjunction with accompanying drawing is described in detail.
Refer to Fig. 1 and Fig. 2, the structural representation of the transformer with split winding provided for the utility model embodiment.Wherein, the three-dimensional structure diagram that Fig. 1 is this transformer with split winding, the vertical view that Fig. 2 is this transformer with split winding.As depicted in figs. 1 and 2, this transformer with split winding comprises iron core 100, and is wrapped in high pressure winding 200 and low pressure winding 300 on described iron core 100.Wherein, described iron core 100 comprises yoke 110, lower yoke 120 and magnetic post 130; Wherein going up yoke 110 and lower yoke 120 is the structural members that can produce magnetic line of force closed-loop path, and magnetic post 130 is connected between yoke 110 and lower yoke 120; The number of magnetic post 130 is two or more; All be wound with high pressure winding 200 and low pressure winding 300 on each magnetic post 130, and high pressure winding 200 and the nested setting of low pressure winding 300 ectonexine, high pressure winding 200 is arranged on skin, low pressure winding 300 is arranged on internal layer.
Referring to Fig. 3, is the structural representation of iron core in transformer with split winding 100, and wherein, upper yoke 110 and lower yoke 120 are annular structural part, goes up yoke 110 and the cross section of lower yoke 120 on direction perpendicular to axial direction is annulus.Upper yoke 110 is identical with lower yoke 120 structures, and iron core 100 comprises six magnetic posts 130.Each magnetic post 130 circumferentially is uniformly distributed along upper yoke 110 and lower yoke 120.
Preferably, described magnetic post 130, upper yoke 110 and lower yoke 120 form jointless overall structure, thereby raise the efficiency, and prevent the generation of magnetic leakage.Magnetic post 130, upper yoke 110 and lower yoke 120 can be rolled up and be bundled into shape by cold-reduced silicon sheet.For example, can adopt thickness is the 0.3mm cold-reduced silicon sheet.Wherein, lower yoke 120 and a plurality of magnetic post 130 be roll up and be bundled into shape by cold-reduced silicon sheet after, remove the resulting overall structure of excess stock, after described magnetic post is wound around winding coil, upper yoke 110 is fixed on described magnetic post, and form jointless overall structure with a plurality of magnetic posts 130 and lower yoke 120, to prevent the generation of magnetic leakage.
As shown in Figure 1, the winding leads of described high pressure winding and low pressure winding is by the Base top contact of winding, and the winding leads that each low pressure winding passes through separately respectively is connected with load, and the high pressure winding is connected with high voltage source by corresponding winding leads.In addition, the bottom of high pressure winding and low pressure winding can form star-like or other Equivalent conjunction circuit by different connections.Each high pressure winding on each magnetic post 130 is set to be connected in parallel.
For reduce magnetic post 130 and upper yoke 110 and and lower yoke 120 between seam, preferably, but the interior profile orthographic projection of magnetic post 130 is on the interior profile of upper yoke 110, but and on the interior profile of the interior profile orthographic projection lower yoke 120 of magnetic post 130, wherein interior profile is the interior profile in magnetic post 130, upper yoke 110 or the cross section of lower yoke 120 on direction perpendicular to axial direction, and the projecting direction of the present embodiment is the axial direction along transformer with split winding.In addition, magnetic post 130 can adopt traditional manufacturing process manufacture, and its cross section vertically is followed successively by step-like approximate ellipsoidal.
Preferably, the number of magnetic post can be 3 integral multiple, and from forming three-phase transformer, the transformer with split winding of six magnetic column types of take in the utility model embodiment is illustrated as example.In addition, the number of magnetic post is for can be 6,9 or 12 etc.All be wound with high pressure winding and low pressure winding on each magnetic post, along with the increase of magnetic post, the number of low pressure winding also increases accordingly, thereby can form the many transformer with split windings with more division winding.
In the utility model embodiment, except upper yoke 110 and lower yoke 120 are set to annular structural part, also can be set to the regular polygon structural member.Refer to Fig. 4, the structural representation of the another kind of transformer with split winding provided for the utility model embodiment, wherein, iron core 100 comprises six magnetic posts 130, upper yoke 110 and lower yoke 120 are the regular hexagon structural member, the i.e. cross section on direction perpendicular to axial direction for upper yoke 110 and lower yoke 120, its outline and interior profile are regular hexagon.Six magnetic posts 130 are arranged on the place, summit of regular hexagon structural member equably.Each magnetic post also can be evenly distributed on other position.When upper yoke 110 and lower yoke 120 are set to regular polygon, because there is the electromagnetism loss in the regular polygon structural member at edge, its excitation effect does not have annular structural part good.
In the utility model embodiment, the iron core of transformer with split winding comprises yoke, lower yoke and a plurality of magnetic post, magnetic post and upper yoke and lower yoke can form flux loop, all be wound with high pressure winding and low pressure winding on each magnetic post, by the excitation effect, the high pressure winding excites induced current in the low pressure winding, thereby realizes that high pressure arrives the conversion of low pressure, by high pressure winding and the low pressure winding be wound around respectively on a plurality of magnetic posts, realized a kind of transformer with split winding of function admirable.Concrete, the transformer with split winding provided for the utility model embodiment has following beneficial effect:
One, because each low pressure winding is separately positioned on each magnetic post, thereby avoided in existing axial split transformer, arrange the problem of the height increase that makes transformer with split winding because a plurality of low pressure windings superpose vertically successively, thereby facilitated transportation and the use of transformer with split winding;
Two, because each low pressure winding is separately positioned on each magnetic post, with respect to existing radial transformer with split winding, on the one hand, the transformer with split winding that the utility model embodiment provides can guarantee that the parameter of each low pressure winding is in full accord, thereby meets the insulating requirements of transformer with split winding, and has thermal stability and dynamic stability preferably, on the other hand, capacitance current between the low pressure winding will reduce, and make between impedance and easily reach balanced, improve the stability of whole system;
Three, on each magnetic post, only be wound with one group of high pressure winding and low pressure winding, avoided in existing radial transformer with split winding the problem of the excitation efficiency decrease that causes from the hypertelorism of iron core due to the high pressure winding, the transformer with split winding provided for the utility model embodiment, even in the situation that the division winding is more, also can guarantee the close together of high pressure winding distance Iron core, thereby improve excitation efficiency;
In the transformer with split winding that four, the utility model embodiment provides, can reduce high pressure winding and low pressure and respectively divide the short-circuit impedance between winding, the efficiency that reduces to improve whole transformer with split winding of impedance.
Be understandable that, above execution mode is only the illustrative embodiments adopted for principle of the present utility model is described, yet the utility model is not limited to this.For those skilled in the art, in the situation that do not break away from spirit of the present utility model and essence, can make various modification and improvement, these modification and improvement also are considered as protection range of the present utility model.

Claims (10)

1. a transformer with split winding, is characterized in that, described transformer with split winding comprises iron core, and be wrapped in high pressure winding and low pressure winding on described iron core;
Described iron core comprises yoke, lower yoke and magnetic post; Wherein going up yoke and lower yoke is the structural member that can produce magnetic line of force closed-loop path, and the magnetic post is connected between yoke and lower yoke; The number of magnetic post is two or more;
All be wound with high pressure winding and low pressure winding on each magnetic post, and described high pressure winding and the nested setting of low pressure winding ectonexine, the high pressure winding is arranged on skin, the low pressure winding is arranged on internal layer.
2. transformer with split winding as claimed in claim 1, is characterized in that, described upper yoke and lower yoke are annular structural part.
3. transformer with split winding as claimed in claim 2, is characterized in that, described magnetic post circumferentially is uniformly distributed along described upper yoke and lower yoke.
4. transformer with split winding as claimed in claim 1, is characterized in that, described upper yoke and lower yoke are the regular polygon structural member.
5. transformer with split winding as claimed in claim 1, is characterized in that, described magnetic post, upper yoke and lower yoke form jointless overall structure.
6. transformer with split winding as claimed in claim 1, is characterized in that,
Each high pressure winding is connected in parallel;
The winding leads that each low pressure winding passes through separately respectively is connected with load, and the winding leads of described low pressure winding is by the Base top contact of winding.
7. transformer with split winding as claimed in claim 1, is characterized in that, the integral multiple that the number of described magnetic post is 3.
8. transformer with split winding as claimed in claim 7, is characterized in that, the number of described magnetic post is 6,9 or 12.
9. transformer with split winding as claimed in claim 1, is characterized in that, described upper yoke, lower yoke and a plurality of magnetic post are rolled up and are bundled into shape by cold-reduced silicon sheet.
10. transformer with split winding as claimed in claim 9, is characterized in that, the thickness of described cold-reduced silicon sheet is 0.3mm.
CN201320154712XU 2013-03-27 2013-03-27 Transformer with split windings Active CN203338917U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201320154712XU CN203338917U (en) 2013-03-27 2013-03-27 Transformer with split windings

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105006352A (en) * 2015-08-21 2015-10-28 常州太平洋电力设备(集团)有限公司 24-pulse wound core rectifier transformer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105006352A (en) * 2015-08-21 2015-10-28 常州太平洋电力设备(集团)有限公司 24-pulse wound core rectifier transformer
CN105006352B (en) * 2015-08-21 2017-03-08 常州太平洋电力设备(集团)有限公司 24 pulse wave rewinding material rectifier transformers

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