CN105448485A - Multi-magnetic circuit transformer - Google Patents
Multi-magnetic circuit transformer Download PDFInfo
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- CN105448485A CN105448485A CN201510915620.2A CN201510915620A CN105448485A CN 105448485 A CN105448485 A CN 105448485A CN 201510915620 A CN201510915620 A CN 201510915620A CN 105448485 A CN105448485 A CN 105448485A
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Abstract
The invention discloses a multi-magnetic circuit transformer, which comprises an iron core component, a primary winding and secondary windings, wherein the primary winding and the secondary windings are connected to the iron core component in a wrapping manner; the iron core component comprises at least two iron core sub-components; each iron core sub-component is provided with a primary sub-end and a secondary end; the iron core sub-components are stacked; the primary sub-ends of the iron core sub-components are stacked to form a primary end; the primary winding is wound on the primary end; the number of the secondary windings is consistent with that of the iron core sub-components; and the secondary windings are connected with the secondary end of at least one iron core sub-component in the wrapping manner. According to the multi-magnetic circuit transformer disclosed by the invention, a short-circuit current of the transformer is reduced by shunting a main flux; through appropriate arrangement of the iron core and the windings, the short-circuit current of the transformer can be greatly reduced; over 40-times traditional rated current can be reduced to within 2-times rated current; and accidents and disasters of explosion, fire breakout and the like, caused by a secondary short circuit or a load short circuit of the transformer are avoided.
Description
Technical field
The present invention relates to field transformer, in particular a kind of multiple magnetic circuit transformer.
Background technology
Transformer secondary side (i.e. secondary circuit) under rated primary voltage (i.e. primary voltage) is short-circuited suddenly fault, is called transformer sudden short circuit.During transformer sudden short circuit, the electric current flow through in first and second winding is called short circuit current.Short circuit current is only limited by the direct impedance of transformer and the line impedance of primary side.So the short circuit current of transformer when sudden short circuit is very large, sometimes can reach more than 20 times of rated current, its instantaneous impact peak value electric current even can exceed 50 times of rated current.Short circuit current produces huge electromagnetic force in the windings, and is delivered on the structural member of composition transformer, and the associated components of transformer can be made time serious to blow; On the other hand, short circuit current winding can be caused to generate heat rapidly, fuse, fault and the disaster such as on fire.
The short circuit current size of limiting transformer is that transformer manufacturing producer must consider, current method is the short-circuit impedance of increasing transformer mostly and installs overcurrent protection circuit additional: the former, the short-circuit impedance strengthening transformer by current method can bring other hidden danger usually, one is that cost increases, two is supplementary load loss and stray loss also corresponding increases of transformer, sometimes even can exceed the D.C. resistance loss of winding; The latter, install overcurrent protection circuit additional and system cost can be made undoubtedly to increase, on the other hand, inevitably there is certain delay in protection switch action, and protection switch can not the power-off of tripping in time, causes transformer coil short-circuit fire.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The object of the present invention is to provide a kind of multiple magnetic circuit transformer, the short circuit current being intended to solve existing transformer is large, easily accidents caused technical problem.
Technical scheme of the present invention is as follows: a kind of multiple magnetic circuit transformer, comprise armature winding on core assembly of core assembly and solderless wrapped connection and secondary winding, wherein, described core assembly comprises at least two iron core components, described iron core component is provided with elementary son end and secondary end, the stacked setting of described each iron core component, the elementary sub-end layer stacked group of each iron core component becomes primary side; Described armature winding is wound on primary side; Described secondary winding quantity is consistent with iron core component quantity, the secondary end of described at least one iron core component of secondary winding solderless wrapped connection.
Described multiple magnetic circuit transformer, wherein, described core assembly comprises two iron core components and two secondary winding, and the solderless wrapped connection of described two secondary winding difference is on the secondary end of two iron core components.
Described multiple magnetic circuit transformer, wherein, described core assembly comprises at least three iron core components and at least three secondary winding, described secondary winding individually solderless wrapped connection on the secondary end of each iron core component, or the secondary end of described secondary winding simultaneously solderless wrapped connection at least two iron core components.
Described multiple magnetic circuit transformer, wherein, described iron core component is EI shape iron core, and each iron core component left-right situs combination is arranged.
Described multiple magnetic circuit transformer, wherein, described iron core component is annular core, and each iron core component is arranged above and below stacked setting.
Described multiple magnetic circuit transformer, wherein, described multiple magnetic circuit transformer also comprises the U-shaped folder be arranged between each iron core component, and each iron core component two ends are fixed through iron core component end and U-shaped folder by cross locking bolt.
Beneficial effect of the present invention: the invention discloses a kind of multiple magnetic circuit transformer, by main flux being carried out shunt the short circuit current reducing transformer, suitable iron core and winding are arranged and the short circuit current of transformer can be made to decline to a great extent, within 2 times of rated current can being reduced to by traditional rated current more than 40 times, avoid because of transformer secondary output short circuit or load short circuits cause transformer self to explode, accident and the disaster such as on fire.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing Transformer Winding.
Fig. 2 is the structural representation of multiple magnetic circuit transformer in the present invention.
Fig. 3 is the schematic diagram of multiple magnetic circuit transformer in the present invention.
Fig. 4 is the structure diagram of the multiple magnetic circuit transformer iron core adopting EI shape iron core.
Fig. 5 is the structure diagram of the multiple magnetic circuit transformer iron core adopting annular core.
Fig. 6 is the end view of the multiple magnetic circuit transformer iron core adopting EI shape iron core.
Embodiment
For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.
Existing Transformer Winding as shown in Figure 1, comprises core assembly 100, and on this core assembly 100, solderless wrapped connection has armature winding P, secondary winding S1, S2, S3 and S4.Can find out, secondary winding S1, S2, S3 and S4 share main flux (magnetic flux namely produced after armature winding P energising), when one of them secondary winding sudden short circuit, are just equivalent to the main flux that short circuit is whole.At this moment, corresponding secondary current (i.e. the electric current of secondary winding) and primary current (i.e. the electric current of armature winding) all can instantaneously increase, and sometimes can reach more than 20 times of rated current, thus cause accident.
In order to solve transformer sudden short circuit cause secondary current and primary current too high and cause transformer part to burst or problem on fire of burning, the core structure of the present invention to transformer improves.
Embodiment 1
As shown in Figure 2, present embodiment discloses a kind of multiple magnetic circuit transformer, comprise the P in core assembly and armature winding 200(and Fig. 2 of solderless wrapped connection on core assembly) and secondary winding 300(and Fig. 2 in S1, S2, S3 and S4), in practical application, it is 4 that core assembly comprises at least two iron core component 110(Fig. 2), this iron core component 110 is provided with elementary son end 111 and secondary end 112, the stacked setting of each iron core component 110, the elementary son end 111 stacked composition primary sides of each iron core component 110.Armature winding 200 is wound on primary side, and secondary winding 300 quantity is consistent with iron core component quantity, the secondary end 112 of secondary winding 300 solderless wrapped connection iron core component.
This setup of the present embodiment, the main flux produced after utilizing each secondary winding 300 pairs of armature windings 200 to be energized is shunted, each secondary winding 300 is relative to the short-circuit impedance all very large (more than 50%) of armature winding 200, secondary winding more than 300 (main flux produced after being namely energized to armature winding 200 is shunted more thorough) simultaneously, the short-circuit impedance of each secondary winding 300 is larger, thus realize the short circuit current reducing transformer, prevent transformer from causing situation that is on fire or that burst that (its schematic diagram is see Fig. 3) occurs because of sudden short circuit.When one of them secondary winding 300 or its load connect are short-circuited, the main flux of its shorted section is less, therefore the primary current of primary coil and the secondary current of this short circuit can not be caused to increase substantially, and general short circuit current can control in 2 times of rated current.Meanwhile, this set structure of the present invention, although greatly improve the short-circuit impedance of transformer, can't increase supplementary load loss or the stray loss of transformer, structure is rationally ingenious, and practicality is high.
In practical application, iron core component 110 can select different shapes, such as, can adopt traditional EI shape iron core piece, or adopts annular core part.The parameter of difform iron core component 110 pairs of completed transformer has certain influence, and concrete needs is selected according to the practical application of this transformer.Iron core component 110 adopts EI shape iron core piece, see Fig. 4, each iron core component 110 left-right situs combination is arranged, this setup is convenient to workman's coiling, can improve make efficiency, to produce the transformer performance that obtains better simultaneously, and applicability is strong, the output voltage stabilization of each secondary winding 300, strong anti-interference performance.
Further, see Fig. 6, (wherein label 150 is binding post, rightmost is primary terminals, all the other are secondary terminal), multiple magnetic circuit transformer also comprise be arranged on each iron core component 110(and EI shape iron core piece) between U-shaped folder 120, during installation, each iron core component 110 two ends are fixed through iron core component 110 end and U-shaped folder 120 by cross locking bolt 130.This mounting means, be easy on the one hand install, the steadiness of whole core structure is good simultaneously; On the other hand, this set structure makes to form air duct 140 between two adjacent iron core components 110, greatly improve the radiating efficiency of transformer, find after tested, the radiating efficiency of the transformer of this structure improves 25% ~ 30% than the radiating efficiency of traditional transformer.
Embodiment 2
As shown in Figure 5, present embodiment discloses another kind utilizes annular core component 110 to produce the transformer iron-core structure obtained.For the ease of workman's coiling, each annular core component 110 stacked on top of one another is arranged, iron core component 110 structure of this annular, magnetic flux flows is more smooth and easy, and the shunting effect of main flux is better, and the output voltage stability of each secondary winding is higher simultaneously, antijamming capability is stronger, make the loss of transformer less, efficiency is higher, is applicable to very much the application scenario requirement of low-loss small size.
In practical application, in order to improve certain secondary short circuit current, can by the secondary end 112(of the multiple iron core component 110 of this secondary winding solderless wrapped connection simultaneously or the sectional area of iron core component increasing this secondary winding institute solderless wrapped connection).
In order to illustrate that the present invention significantly can reduce the sudden short circuit electric current of transformer, actual fabrication goes out the single-phase isolating transformer of two 5KW, wherein one makes (namely pressing the structure of Fig. 1) in the usual way, another makes by the present invention program and (namely presses Fig. 2 structure, only adopt two iron core components, respectively corresponding secondary 1 winding and secondary 2 windings).Important technological parameters is: rated capacity 5KW, elementary rated voltage 220V, secondary is that two groups of 110V voltages export, elementary rated current is 22.7A, each is organized secondary rated current and is 22.7A, and the important technological parameters of two single-phase isolating transformers is identical, respectively secondary 1 winding and secondary 2 windings is carried out short circuit connection, measure secondary current and the primary current of short circuit, each data are as shown in the table:
As seen from the above table, the present invention significantly can reduce the short circuit current of secondary winding and armature winding.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (6)
1. a multiple magnetic circuit transformer, comprise armature winding on core assembly of core assembly and solderless wrapped connection and secondary winding, it is characterized in that, described core assembly comprises at least two iron core components, described iron core component is provided with elementary son end and secondary end, the stacked setting of described each iron core component, the elementary sub-end layer stacked group of each iron core component becomes primary side; Described armature winding is wound on primary side; Described secondary winding quantity is consistent with iron core component quantity, the secondary end of described at least one iron core component of secondary winding solderless wrapped connection.
2. multiple magnetic circuit transformer according to claim 1, is characterized in that, described core assembly comprises two iron core components and two secondary winding, and the solderless wrapped connection of described two secondary winding difference is on the secondary end of two iron core components.
3. multiple magnetic circuit transformer according to claim 1, it is characterized in that, described core assembly comprises at least three iron core components and at least three secondary winding, described secondary winding individually solderless wrapped connection on the secondary end of each iron core component, or the secondary end of described secondary winding simultaneously solderless wrapped connection at least two iron core components.
4. the multiple magnetic circuit transformer according to claim 1 ~ 3 any one, is characterized in that, described iron core component is EI shape iron core, and each iron core component left-right situs combination is arranged.
5. the multiple magnetic circuit transformer according to claim 1 ~ 3 any one, is characterized in that, described iron core component is annular core, and each iron core component is arranged above and below stacked setting.
6. multiple magnetic circuit transformer according to claim 4, is characterized in that, described multiple magnetic circuit transformer also comprises the U-shaped folder be arranged between each iron core component, and each iron core component two ends are fixed through iron core component end and U-shaped folder by cross locking bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915620.2A CN105448485A (en) | 2015-12-10 | 2015-12-10 | Multi-magnetic circuit transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915620.2A CN105448485A (en) | 2015-12-10 | 2015-12-10 | Multi-magnetic circuit transformer |
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| CN105448485A true CN105448485A (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510915620.2A Pending CN105448485A (en) | 2015-12-10 | 2015-12-10 | Multi-magnetic circuit transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597732A (en) * | 2018-05-24 | 2018-09-28 | 河南森源电气股份有限公司 | Iron core reactor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1169615A (en) * | 1996-06-27 | 1998-01-07 | 哈贝尔公司 | In-line buck/boost voltage regulating systems and apparatus |
| CN201112107Y (en) * | 2007-09-29 | 2008-09-10 | 深圳市浦天利光电技术有限公司 | Transformer capable of supplying multiway exact outputs |
| WO2012008576A1 (en) * | 2010-07-15 | 2012-01-19 | Ide Osamu | Transformer |
| CN102881432A (en) * | 2012-09-11 | 2013-01-16 | 江苏精海变压器有限公司 | Multi-winding transformer |
| CN102903497A (en) * | 2012-09-11 | 2013-01-30 | 江苏精海变压器有限公司 | Multi-magnetic-path transformer |
| CN103956257A (en) * | 2014-03-31 | 2014-07-30 | 上海盖能电气有限公司 | Multi-magnetic-circuit voltage regulating transformer |
-
2015
- 2015-12-10 CN CN201510915620.2A patent/CN105448485A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1169615A (en) * | 1996-06-27 | 1998-01-07 | 哈贝尔公司 | In-line buck/boost voltage regulating systems and apparatus |
| CN201112107Y (en) * | 2007-09-29 | 2008-09-10 | 深圳市浦天利光电技术有限公司 | Transformer capable of supplying multiway exact outputs |
| WO2012008576A1 (en) * | 2010-07-15 | 2012-01-19 | Ide Osamu | Transformer |
| CN102881432A (en) * | 2012-09-11 | 2013-01-16 | 江苏精海变压器有限公司 | Multi-winding transformer |
| CN102903497A (en) * | 2012-09-11 | 2013-01-30 | 江苏精海变压器有限公司 | Multi-magnetic-path transformer |
| CN103956257A (en) * | 2014-03-31 | 2014-07-30 | 上海盖能电气有限公司 | Multi-magnetic-circuit voltage regulating transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597732A (en) * | 2018-05-24 | 2018-09-28 | 河南森源电气股份有限公司 | Iron core reactor |
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Application publication date: 20160330 |
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