CN109698043A - The conducting wire of for transformer winding and a kind of transformer - Google Patents

The conducting wire of for transformer winding and a kind of transformer Download PDF

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Publication number
CN109698043A
CN109698043A CN201910116939.7A CN201910116939A CN109698043A CN 109698043 A CN109698043 A CN 109698043A CN 201910116939 A CN201910116939 A CN 201910116939A CN 109698043 A CN109698043 A CN 109698043A
Authority
CN
China
Prior art keywords
winding
transformer
conducting wire
conductor thread
vice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910116939.7A
Other languages
Chinese (zh)
Inventor
邵革良
肖俊承
王一龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaglerise Electric & Electronic (china) Co Ltd
Foshan Shunde Igor Power Technology Co Ltd
Original Assignee
Eaglerise Electric & Electronic (china) Co Ltd
Foshan Shunde Igor Power Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eaglerise Electric & Electronic (china) Co Ltd, Foshan Shunde Igor Power Technology Co Ltd filed Critical Eaglerise Electric & Electronic (china) Co Ltd
Priority to CN201910116939.7A priority Critical patent/CN109698043A/en
Publication of CN109698043A publication Critical patent/CN109698043A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/02Disposition of insulation
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/08Flat or ribbon cables
    • H01B7/0861Flat or ribbon cables comprising one or more screens
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2823Wires
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/288Shielding
    • H01F27/2885Shielding with shields or electrodes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/34Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00Fixed transformers not covered by group H01F19/00
    • H01F30/06Fixed transformers not covered by group H01F19/00 characterised by the structure

Abstract

A kind of conducting wire and a kind of transformer of for transformer winding, conducting wire include the first insulating layer, two conductor thread cores are arranged inside, wherein every conductor thread core is all successively enclosed with second insulating layer and metal screen layer.The primary side winding of transformer and the coil of vice-side winding are wound in a manner of Double-wire parallel wound by the conducting wire and are made.Since the power supply symmetry of transformer is good, and the D.C. resistance of its primary side winding and vice-side winding is symmetrical and AC impedance is symmetrical, again always because of primary side winding and the parameter of vice-side winding, be conducive to the inhibition to common mode interference, it can play the role of preventing to a certain extent magnetically saturated, therefore be also beneficial to the Electro Magnetic Compatibility of transformer.So that transformer high-frequency high-power easy to accomplish, significantly improving and preventing high-frequency and high-voltage partial discharge phenomenon, coupled close to the 100% secondary side of original, so that transformer realizes ultralow leakage inductance.

Description

The conducting wire of for transformer winding and a kind of transformer
Technical field
The present invention relates to field transformers, and in particular to the conducting wire of for transformer winding and a kind of transformer.
Background technique
High frequency transformer is the power transformer that working frequency is more than 10KHz, is mainly used as the change of high frequency transforming switch power supply Depressor also has for making high frequency inverter transformer in high frequency inverter and Inverter Welder.With battery technology With the development of high-power electric and electronic technology, such as traction transformation device, the DC power transmission for large-scale charging station and high-speed rail Power transmitting device is isolated with high power DCs transformations such as parallel network power generations, in order to improve the transfer efficiency of electric energy, reduce body It accumulates and reduces cost, need to develop one kind can be isolated tens of thousands of volt voltages, and can prevent the height of shelf depreciation caused by high-frequency and high-voltage Frequency high-power transformer.Particularly for the power transformer of high frequency Variable-voltage switch, when because of high frequency switching device work, there are high DV/dt voltage change ratio, the small shelf depreciation of the high pressure resistant condition of high-power high-frequency transformer in order to prevent.Traditional method It is, as far as possible by the primary side winding of transformer and vice-side winding separation coiling and using epoxy resin, the silica gel of high pressure resistant insulation Vacuum pouring encapsulating is carried out with materials such as polyurethane, makes to have between primary side winding and vice-side winding more than tens of milliseconds distance Gapless insulation encapsulated.Using the high frequency transformer of this technique, firstly, being exactly because of distance between primary side winding and vice-side winding Greatly, so volume of transformer is huge;Secondly because primary side winding and vice-side winding distinguish coiling, so transformer winding exists Quite serious high frequency approach effect, so that the high-frequency loss of transformer coli winding becomes larger to be reduced with efficiency;Again, due to becoming Depressor primary side winding and vice-side winding separate coiling, cannot be guaranteed the equilibrium degree of winding, therefore transformer leakage inductance is bigger than normal.
Summary of the invention
The present invention solves the technical problem of high frequency transformer because primary side winding and vice-side winding distinguish coiling, in turn High frequency transformer caused by making between primary side winding and vice-side winding distance excessive is bulky, serious approach effect and leakage inductance Technical problem bigger than normal.
According in a first aspect, provide a kind of conducting wire of for transformer winding, including the first insulating layer in a kind of embodiment, Two conductor thread cores are arranged inside, wherein every conductor thread core is all successively enclosed with second insulating layer and metal screen layer.
According to second aspect, a kind of transformer is provided in a kind of embodiment, including conducting wire described in first aspect, wherein institute The primary side winding that a conductor thread core in conducting wire is used as the transformer is stated, another conductor thread core is used as the transformer Vice-side winding.
The conducting wire and a kind of transformer of for transformer winding according to above-described embodiment, every conductor thread core of conducting wire is all It is successively enclosed with insulating layer and metal screen layer, and conducting wire of the conductor thread core as primary side winding coil, another is led Conducting wire of the body core as vice-side winding coil.Since primary side winding and vice-side winding use the coiling of Double-wire parallel wound method, so that becoming Two winding D.C. resistances of depressor are symmetrical, and then keep power supply symmetry good.
Detailed description of the invention
Fig. 1 be successively between winding wound around coil transformer part section structural schematic diagram;
Fig. 2 is the transformer section structural schematic diagram of Double-wire parallel wound method wound around coil;
Fig. 3 is a kind of structural schematic diagram of the conducting wire of for transformer winding in embodiment;
Fig. 4 is a kind of conductor cross-section schematic diagram of for transformer winding in embodiment;
Fig. 5 is the structural schematic diagram of the conducting wire of for transformer winding in another embodiment;
Fig. 6 is the structural schematic diagram of the conducting wire of for transformer winding in another embodiment;
Fig. 7 is the structural schematic diagram of transformer in another embodiment;
Fig. 8 is the local section schematic diagram of transformer in another embodiment;
Fig. 9 is the circuit diagram of transformer in another embodiment.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.Wherein different embodiments Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is formed respectively in addition, feature described in this description, operation or feature can combine in any suitable way Kind embodiment.Meanwhile each step in method description or movement can also can be aobvious and easy according to those skilled in the art institute The mode carry out sequence exchange or adjustment seen.Therefore, the various sequences in the description and the appended drawings are intended merely to clearly describe a certain A embodiment is not meant to be necessary sequence, and wherein some sequentially must comply with unless otherwise indicated.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object, Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and It is indirectly connected with (connection).
When high frequency transformer designs, the leakage inductance and distribution capacity of transformer must minimize, high especially in Switching Power Supply Frequency power transformer transmission is high-frequency pulse square wave signal.In the transient process of transmission, leakage inductance and distribution capacity can cause surge Electric current and peak voltage and top oscillation, cause loss to increase.So making the line of primary side winding and vice-side winding to method Circle is tightly coupled together, and can reduce transformer leakage inductance in this way.Because leakage inductance is excessive, it will cause biggish spike arteries and veins Punching, thus breakdown switch pipe.Therefore, in coiling high-frequency transformer coils, Ying Jinliang makes the line of primary side winding and vice-side winding The distance between circle is close.Generally using Double-wire parallel wound method, successively between the methods of winding and sandwich-type winding wind primary side winding With the coil of vice-side winding.
As shown in Figure 1, for the transformer part section structural schematic diagram of winding wound around coil between successively, including it is magnetic core 4, former Side winding 2, vice-side winding 1 and insulating materials 3.Winding is 1 layered windings magnetic core 4 of primary side winding 2 and vice-side winding between successively, also Can be with 1,3,5 odd-levels around primary side winding, 2,4,6 even levels are around vice-side winding.Sandwich-type winding is secondary side around being wrapped in original The centre of side winding, primary side winding will be wound several times.
As shown in Fig. 2, be Double-wire parallel wound method wound around coil transformer section structural schematic diagram, including magnetic core 4, primary side around Group 2, vice-side winding 1 and insulating materials 3.By the conducting wire of primary side winding 2 and vice-side winding 1 altogether and around magnetic core 4.Wherein, double The primary side winding 2 of line parallel wound and the coil distance of vice-side winding 1 are minimum, and leakage inductance can be made to be reduced to minimum value, but existing The pressure voltage of this winding line-to-line is lower in technology.The main reason is that in the line of transformer primary winding 2 and vice-side winding 1 There are materials of differing dielectric constant and different insulative intensity, such as insulating materials, air, sundries, casting glue etc. between circle.This The difference of the spacing dimensions of a little substances, electric conductivity, is applied when between the primary side winding 2 of transformer and the coil of vice-side winding 1 When high-frequency and high-voltage, although not necessarily occurring high-voltage breakdown between primary side winding 2 and the coil of vice-side winding 1, on different material Assigned voltage deviation it is very big, will appear lasting electrion phenomenon on SI semi-insulation substance, lead to corresponding insulation material , there is insulation breakdown in the Material degradation of material when serious.
In embodiments of the present invention, the conducting wire of for transformer winding includes the first insulating layer, is arranged inside two and leads Body core, wherein every conductor thread core is all successively enclosed with second insulating layer and metal screen layer.The conducting wire is with Double-wire parallel wound Mode winds the primary side winding and vice-side winding of transformer.
Embodiment one:
As shown in Figure 3 and Figure 4, it is cut for the structural schematic diagram of the conducting wire of for transformer winding in a kind of embodiment and conducting wire Face schematic diagram, including the first insulating layer 10, the first conductor thread core 41 and the second conductor thread core 42.First conductor thread core 41 successively by It is enclosed with second insulating layer 31 and metal screen layer 21.Second conductor thread core 42 is successively enclosed with second insulating layer 32 and metal Shielded layer 22.The electrical connection of the metal screen layer 21 and metal screen layer 22 of first conductor thread core 41 and the second conductor thread core 42.Its In, the material of the first conductor thread core 41 and the second conductor thread core 42 can be the same or different, second insulating layer 31 and second 32 thickness of insulating layer is identical, and material is identical.In one embodiment, the first conductor thread core 41 and the second conductor thread core 42 be single or Multicore is twisted core.In one embodiment, the first conductor thread core 41 and the second conductor thread core 42 are round conductor, square lead or flat At least one of flat conducting wire.In one embodiment, the electrical connection of 22 contact of metal screen layer 21 and metal screen layer, i.e. metal screen It covers the either segment of layer 21 and metal screen layer 22 on conducting wire to be all in close contact, and is electrically connected.In one embodiment, metal screen layer 21 and metal screen layer 22 be metallic film or woven wire cloth.In one embodiment, metal screen layer 21 and metal screen layer 22 be wire coil that is single or mostly being formed with thin wire spiral winding.In one embodiment, metal screen layer 21 and metallic shield The material of layer 22 is copper or aluminium.In one embodiment, metal screen layer 21 and metal screen layer 22 are arranged at contacting with each other In one insulating layer 10.Further, the transformer of the conducting wire winding in the embodiment of the present application, metal screen layer 21 and metallic shield Layer 22 is for being grounded.
As shown in figure 5, for the structural schematic diagram of the conducting wire of for transformer winding in another embodiment, including first exhausted Edge layer 10, the first conductor thread core 41 and the second conductor thread core 42.First conductor thread core 41 is successively enclosed with second insulating layer 31 With metal screen layer 21.Second conductor thread core 42 is successively enclosed with second insulating layer 32 and metal screen layer 22.Metallic shield Layer 21 and metal screen layer 22 include sharing to have one section of metal screen layer for dielectric isolation layer 23.
As shown in fig. 6, for the structural schematic diagram of the conducting wire of for transformer winding in another embodiment, including first exhausted Edge layer 10, the first conductor thread core 41 and the second conductor thread core 42.First conductor thread core 41 is successively enclosed with second insulating layer 31 With metal screen layer 21.Second conductor thread core 42 is successively enclosed with second insulating layer 32 and metal screen layer 22.Metallic shield Layer 21 and metal screen layer 22, which share, has one section of metal screen layer for dielectric isolation layer 23.Wherein, the first conductor thread core 41 and Two conductor thread cores 42 are square lead.
In one embodiment, metal screen layer 21 and metal screen layer 22 are grid structures, i.e. metallic shield net, are preferably adopted With occupying the few network of space surface.Or, metal screen layer 21 and metal screen layer 22 are the metal foils of strip.Wherein, The plane occupation rate of gauze screen or sticky foil is not more than 50%, preferably no greater than 5%.It is sparse that fine wire specifically can be used Braiding, the diameter in hole are preferably greater than 1 millimeter.The preferred copper of metal and aluminium.
In disclosed embodiments, the conducting wire of for transformer winding uses novel insulation system, so that first It is covered completely by insulating materials of the same race between conductor thread core 41 and the second conductor thread core 42, the first conductor thread core 41 and the second conductor The metal screen layer 21 and metal screen layer 22 of core 42 are in close contact electrical connection.Relative to entire conductor, the first conductor thread core 41 and the second insulating materials between conductor thread core 42 it is averagely separated by metal screen layer 21 and 22 contact position of metal screen layer, That is the Withstand voltage layer that the insulation system between the first conductor thread core 41 and the second conductor thread core 42 is formed is divided into two layers of Withstand voltage layer. Therefore the winding wire of primary side winding and vice-side winding passes through two independent insulator separations of same dielectric material, by conduction material Insulating layer is separated from the middle and is grounded by the shielded layer of matter, the winding wire parallel arranged of primary side winding and vice-side winding, and Insulation package is carried out on the outside of conducting wire.Using the transformer of conducting wire coiling disclosed in the embodiment of the present application, primary side winding and secondary side Between the coil of winding other than the insulating materials of two layers of identical material same thickness, no longer in the presence of the exhausted of other different mediums Edge material, even if transformer is whole to carry out insulation processing using various dosing technologies again, all insulating encapsulating materials are not It can be filled between transformer primary winding and the winding wire of vice-side winding, other insulation encapsulated dielectric materials also would not Any voltage of electric field is born, therefore entirely eliminated between traditional transformer primary side winding and the coil of vice-side winding and high pressure occur The phenomenon that shelf depreciation.It therefore is not in generation continuous high-pressure electric discharge phenomena between different insulative substance, and then prevent insulation material The Material degradation of material.
Embodiment two:
It as shown in Figure 7 and Figure 8, is the structural schematic diagram and local section schematic diagram of transformer in another embodiment, packet Include conducting wire and magnetic core 50 disclosed in the present application.Magnetic core 50 is E-type magnetic core.Conducting wire is wrapped on the center pillar of magnetic core 50.Conducting wire is with double Line and the primary side winding and vice-side winding that transformer is wound around mode.Conducting wire includes the first conductor thread core 41 and the second conductor thread core 42, metal screen layer.First conductor thread core 41 includes first end 411 and second end 412, and the first conductor thread core 42 includes third end 421 and the 4th end 422, metal screen layer includes ground termination points 211.The primary side of 412 for transformer of first end 411 and second end The input terminal and output end of winding coil, the output end of the vice-side winding coil of 422 for transformer of third end 421 and the 4th end And output end, ground termination points 211 are for being grounded.
As shown in figure 9, for the circuit diagram of transformer in another embodiment, including first end 411, second end 412, Third end 421, the 4th end 422 and ground termination points 211.The primary side winding coil of 412 for transformer of first end 411 and second end Input terminal and output end, the output end of the vice-side winding coil of 422 for transformer of third end 421 and the 4th end and output End, ground termination points 211 are for being grounded.
In one embodiment, magnetic core 50 is magnetic ferrite magnetic core, amorphous band magnetic core, nano amorphous band magnetic core or soft magnetism At least one of property magnetic core.In one embodiment, magnetic core 50 can make the magnetic core of other types, and conducting wire is wrapped in various closed magnetic circuits On magnetic core, to turn to the primary side winding and vice-side winding of transformer.In one embodiment, transformer disclosed in the present application can be with Increase insulation and sealing structure, insulation and sealing structure is for primary side winding and vice-side winding described in insulated enclosure.Its insulated enclosure knot The material of structure can carry out closed encapsulating use using insulating materials such as epoxy resin, silica gel, polyurethane, also may not need filling Envelope, primary side winding and vice-side winding can also naked leakage state uses.
In one embodiment, transformer disclosed in the present application is high frequency transformer, uses primary side winding and vice-side winding with 1:1 No-load voltage ratio form, i.e., the coil ratio of primary side winding and vice-side winding be 1:1.In order to realize that different no-load voltage ratios, the application are public The transformer opened can carry out the coiling of different the number of turns using a plurality of conducting wire disclosed in the present application, then primary side is carried out at lead-out wire The series-parallel combination of different the number of turns of winding and vice-side winding, come formed transformer different no-load voltage ratios needs.
Conducting wire disclosed in the present application winds the primary side winding and vice-side winding of transformer in a manner of Double-wire parallel wound, using the change The power supply symmetry of depressor is good, and the D.C. resistance of its primary side winding and vice-side winding is symmetrical and AC impedance is symmetrical, and twines Around convenient.It, can be in certain journey again because primary side winding and the parameter of vice-side winding always, are conducive to the inhibition to common mode interference Play the role of preventing magnetically saturated on degree, therefore is also beneficial to the Electro Magnetic Compatibility of transformer.So that transformer is easy in fact Existing high-frequency high-power significantly improves and prevents high-frequency and high-voltage partial discharge phenomenon, couples close to the 100% secondary side of original, so that Transformer realizes ultralow leakage inductance.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple It deduces, deform or replaces.

Claims (10)

1. a kind of conducting wire of for transformer winding, which is characterized in that including the first insulating layer, two conductor lines are arranged inside Core, wherein every conductor thread core is all successively enclosed with second insulating layer and metal screen layer.
2. conducting wire as described in claim 1, which is characterized in that the metal screen layer of two conductor thread cores is electrically connected It connects.
3. conducting wire as claimed in claim 2, which is characterized in that the metal screen layer of two conductor thread cores mutually connects It contacts to earth and is arranged in first insulating layer.
4. conducting wire as claimed in claim 2, which is characterized in that the metal screen layer metal foil of two conductor thread cores Film or woven wire cloth.
5. conducting wire as claimed in claim 2, which is characterized in that the metal screen layer of two conductor thread cores, which shares, to be had One section.
6. conducting wire as claimed in claim 1 or 2, the metal screen layer is for being grounded.
7. conducting wire as described in claim 1, which is characterized in that the conductor thread core is single;Or, the conductor thread core is more Core is twisted core.
8. a kind of transformer, which is characterized in that the conducting wire including the described in any item for transformer windings of claim 1 to 7, Wherein a conductor thread core in the conducting wire is used as the primary side winding of the transformer, and another conductor thread core is used as the change The vice-side winding of depressor.
9. transformer as claimed in claim 8, which is characterized in that the conducting wire wound in a manner of Double-wire parallel wound primary side winding and Vice-side winding.
10. transformer as claimed in claim 8, which is characterized in that the metal screen layer of two conductor thread cores is for connecing Ground.
CN201910116939.7A 2019-02-15 2019-02-15 The conducting wire of for transformer winding and a kind of transformer Pending CN109698043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910116939.7A CN109698043A (en) 2019-02-15 2019-02-15 The conducting wire of for transformer winding and a kind of transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910116939.7A CN109698043A (en) 2019-02-15 2019-02-15 The conducting wire of for transformer winding and a kind of transformer

Publications (1)

Publication Number Publication Date
CN109698043A true CN109698043A (en) 2019-04-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910116939.7A Pending CN109698043A (en) 2019-02-15 2019-02-15 The conducting wire of for transformer winding and a kind of transformer

Country Status (1)

Country Link
CN (1) CN109698043A (en)

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