CN207704998U - A kind of machine car transformer - Google Patents
A kind of machine car transformer Download PDFInfo
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- CN207704998U CN207704998U CN201721864662.9U CN201721864662U CN207704998U CN 207704998 U CN207704998 U CN 207704998U CN 201721864662 U CN201721864662 U CN 201721864662U CN 207704998 U CN207704998 U CN 207704998U
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Abstract
The utility model is related to a kind of machine car transformers, including iron core, package parts and winding, iron core constitutes heart type structure by iron core column and iron yoke, and the fixation and encapsulation of iron core are carried out using package parts, iron core column cross section is in polygon trapezium structure, when its approximate circular diameter is between 270 millimeters and 290 millimeters, the series of iron core column is more than 11 grades；Winding includes low pressure winding and high-voltage winding, and winding uses concentric type, and winding is divided into upper and lower two layers along the axis direction of iron core column, forms double winding quadripartion structure；Between the top of upper layer winding, two layers of winding and bottom of lower layer's winding is both provided with insulating end ring, and insulating end ring is for insulating.Under locomotive spatial transformer and the restrictive condition of weight, the machine car transformer not only meets the technology requirement of large capacity, lightweight and high reliability, can also reduce leakage field and eddy-current loss, so that the machine car transformer has higher power density.
Description
Technical field
The utility model is related to special voltage Class power transformer technical fields, and in particular to a kind of locomotive transformation
Device.
Background technology
In recent years, with the continuous speed-raising of China's EMU, reliability of the railroad to high-speed EMUs power-equipment
Increasingly higher demands are proposed with safety；Machine car transformer is most important electrical equipment in electric railway, property
The quality of energy has conclusive influence to the operation of electric railway；Machine car transformer is high-speed EMUs Traction Drive system
The critical component of system, in order to meet the requirement of modern electrical railway speed increase, the locomotive as electrical system critical component becomes
Depressor increasingly develops to lightweight, miniaturization and high reliability direction；However, high-speed EMUs traction drive uses locomotive
The demand of transformer capacity is increasing, how under the limitation of EMU space and weight, reduces leakage field and eddy-current loss,
The power density of raising machine car transformer is current urgent problem to be solved.
Utility model content
The purpose of this utility model is that improving the deficiency in the presence of the prior art, a kind of machine car transformer is provided,
Under locomotive spatial transformer and the restrictive condition of weight, which not only meets large capacity, lightweight and height
The technology requirement of reliability, can also reduce leakage field and eddy-current loss, so that machine car transformer has higher power
Density.
Technical solution adopted by the utility model to solve its technical problems is：
A kind of machine car transformer, including iron core, package parts and winding, the iron core constitute the heart by iron core column and iron yoke
Formula structure, and using the fixation and encapsulation of package parts progress iron core, the iron core column and iron yoke are folded by iron core column respectively
Piece and iron yoke lamination are overrided to form, and iron core column cross section is in polygon trapezium structure, and approximate circular diameter is between 270 millimeters and 290
When between millimeter, the series of iron core column is more than 11 grades；The winding includes low pressure winding and high-voltage winding, and winding is using concentric
Formula, and winding is divided into upper and lower two layers along the axis direction of iron core column, forms double winding quadripartion structure；The top of upper layer winding,
Between two layers of winding and bottom of lower layer's winding is both provided with insulating end ring, and the insulating end ring is for insulating.
Preferably, the iron core column and iron yoke are folded by iron core column lamination and iron yoke that dimensional parameters are ten three grades respectively
Piece is overrided to form, and iron core column cross section is 270 millimeters like circular diameter, and series is 13 grades.
Preferably, the iron core column lamination and iron yoke lamination are formed by silicon steel plate stacking, the thickness of the silicon steel sheet
It is 0.3 millimeter.
Preferably, the iron core is using four-piece type overlapping configuration.The iron core of transformer is by iron core column and iron yoke two
Part composition, be the main magnetic circuit of transformer, for the magnetic property for improving magnetic circuit and less iron loss, iron core is using four
Formula overlapping configuration.
Preferably, the cross section of iron yoke is rectangle in the iron core.
Preferably, the conducting wire for forming the winding is NOMEX paper bag flat type copper wires.Its electrical, chemistry and machine due to NOMEX paper
Tool integrality is high, and elasticity, flexibility, tear resistance, humidity and wearability are all fine, and very acid-alkali-corrosive-resisting,
Will not be destroyed by insect, mould and fungi, it can with all kinds varnish, adhesive, transformer liquid, lubricating oil and
Refrigerant is compatible, and another NOMEX paper heat resisting temperature is high, even if temperature is up to 220 DEG C, still maintains original insulation performance, uses
NOMEX paper bags flat type copper wire can improve the performance of transformer, and improve reliability and safety.
Preferably, in the Concentrical winding, internal layer is low pressure winding, and outer layer is high-voltage winding.Such structure makes
The insulating requirements of transformer are easier to be met, while convenient for drawing the high-voltage tap changer of high-voltage winding.
Preferably, the low pressure winding uses single screw structure, the high-voltage winding to use continuous structure.Low pressure around
It is alternating expression that both winding methods of group and high-voltage winding, which can be considered as coil windings, can reduce the generation of leakage field, is reduced
Winding added losses, especially eddy-current loss.Preferably, the insulating end ring thickness at the top of the upper layer winding is 18 millimeters, under
The insulating end ring thickness of layer winding bottom is 28 millimeters, and the insulating end ring thickness between upper layer and lower layer winding is 34 millimeters.Insulation
Hold the thickness of circle bigger, insulation effect is better, but the inside transformer space that corresponding insulating end ring occupies is bigger, so
In the case of meeting space requirement, it can suitably increase the thickness of insulating end ring.
Preferably, in the low pressure winding：6 groups of insulating end rings, low-voltage coil and high-tension coil is arranged in coil upper and lower ends
Between insulation by low-pressure side to high-pressure side successively by 3.25mm oil ducts, 5mm paper webs, 3.25mm oil ducts, 5mm paper webs, 3.25mm
Oil duct is constituted；In the high-voltage winding：Coil upper and lower ends set 30 groups of insulating end rings.Insulation effect between coil is good, favorably
In reducing leakage field, to effectively improve power density.
Preferably, the low pressure winding includes 6 layers of low-voltage coil, and conducting wire is alternating expression line cake structure, wherein 1-5 layers are led
Number of wire turns is that the 9, the 6th layer conductor the number of turns is 8, and oil duct gap is 2.25mm between conducting wire, conducting wire lift one's head for 2 conducting wires and around.Oil duct
Play a part of insulation, cooling, heat dissipation, in this way, being on the one hand conducive to winding wiring, is on the other hand conducive to the property for making transformer
Can be more stable, and obtain higher power density.
Preferably, the high-voltage winding includes 30 layers of high-tension coil, and conducting wire is alternating expression line cake structure, 1-29 layer conductor circles
It is 31 that number, which is the 47, the 30th layer conductor the number of turns, gap 0.48mm between every layer conductor, and an oil duct, oil duct gap is arranged between every 2 layer conductor
For 2.25mm, conducting wire is lifted one's head to be wrapped for 1 conducting wire.
Compared with prior art, it is had an advantageous effect in that using a kind of machine car transformer provided by the utility model：
Design is optimized in the parameters such as dimensional parameters, leakage field, loss to locomotive transformer core, and empty in machine car transformer
Between and the restrictive condition of weight under, have devised a kind of double winding quadripartion machine car transformer, not only meet large capacity, light weight
Change and the technology of high reliability requires, moreover it is possible to leakage field is efficiently reduced, winding added losses, especially eddy-current loss are reduced, from
And make machine car transformer that there is higher power density.
Description of the drawings
It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is iron core column lamination and iron yoke lamination in a kind of machine car transformer that the utility model embodiment provides
Closed assembly schematic diagram；
Fig. 2 is after a kind of machine car transformer that the utility model embodiment provides completes closed assembly, and the structure of iron core is shown
It is intended to；
Fig. 3 is the structural representation of iron core column cross section in a kind of machine car transformer that the utility model embodiment provides
Figure；
Fig. 4 is in a kind of machine car transformer that the utility model embodiment provides, and approximation circle in iron core column cross section shows
It is intended to；
Fig. 5 is in a kind of machine car transformer that the utility model embodiment provides, and iron core is packaged component and fixes and seal
Design sketch after dress；
Fig. 6 is low, high-voltage winding in a kind of double winding quadripartion machine car transformer that the utility model embodiment provides
Schematic diagram；
Fig. 7 is a kind of front view for machine car transformer that the utility model embodiment provides.
Fig. 8 is in a kind of machine car transformer for providing of the utility model embodiment, low, high-tension coil around to and lift one's head and show
It is intended to；
Description of symbols in figure
Iron core 101；Iron core column 102；Iron yoke 103；Lamination 104；
Winding 201；Low pressure winding 202；High-voltage winding 203；First low pressure winding 204；Second low pressure winding 205；Third
Low pressure winding 206；4th low pressure winding 207；First high-voltage winding 208；Second high-voltage winding 209；Third high-voltage winding 210；
4th high-voltage winding 211；Insulating end ring 212；
Package parts 301 draw screw rod 302.
Iron core column lamination 102-1, iron yoke lamination 103-1.
Specific implementation mode
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities
Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations
Arrangement and design.Therefore, the detailed description of the embodiments of the present invention to providing in the accompanying drawings is not intended to limit below
Claimed the scope of the utility model, but it is merely representative of the selected embodiment of the utility model.Based on the utility model
Embodiment, the every other embodiment that those skilled in the art are obtained without making creative work, all
Belong to the range of the utility model protection.
Embodiment 1
A kind of machine car transformer, including iron core 101, package parts 301 and winding 201, institute are provided in the present embodiment
It states iron core 101 and heart type structure is constituted by iron core column 102 and iron yoke 103, and iron core 101 is carried out using the package parts 301
Fixed and encapsulation, the iron core column 102 and iron yoke 103 laminated respectively by iron core column lamination 102-1 and iron yoke lamination 103-1 and
At, 102 cross section of iron core column is in polygon trapezium structure, when approximate circular diameter is between 270 millimeters and 290 millimeters, iron core
The series of column 102 is more than 11 grades；The winding 201 includes low pressure winding 202 and high-voltage winding 203, and winding 201 is using concentric
Formula, and winding 201 is divided into upper and lower two layers along the axis direction of iron core column 102, forms 201 quadripartion structure of double winding；Upper layer around
The top of group 201, between two layers of winding 201 and bottom of lower layer's winding 201 are both provided with insulating end ring 212, the insulation
End circle 212 is for insulating.
Preferably, the iron core column lamination 102-1 and iron yoke lamination 103-1 is formed by silicon steel plate stacking, the silicon
The thickness of steel disc is 0.3 millimeter.Iron core 101 is the element of transformer, is the main magnetic circuit of transformer；Iron core 101 is logical
It is often made of iron core column 102 and 103 two parts of iron yoke, in order to improve the magnetic property of iron core 101 and reduce iron loss, iron core 101
Usual thickness is 0.35-0.5mm, surface is coated with the hot rolling of insulated paint or cold-reduced silicon sheet is built up.
In the present embodiment, iron core column 102 and iron yoke 103 are respectively the iron core column lamination of ten three grades by dimensional parameters
102-1 and iron yoke lamination 103-1 are overrided to form, as shown in table 1,
The dimensional parameters of iron core column lamination and iron yoke lamination in 1 iron core of table
The iron core 101 of transformer is dimerous by iron core column 102 and iron yoke 103, is the main magnetic circuit of transformer, is
The magnetic property of magnetic circuit and less iron loss are improved, iron core 101 forms two pieces using four-piece type overlapping configuration after laminating
Iron core column 102, forms loop between two iron core columns 102 by connecting iron yoke 103, is iron core column lamination as shown in Figure 1
The schematic diagram of 102-1 and iron yoke lamination 103-1 closed assemblies；Design sketch after the completion of 101 closed assembly of iron core is as shown in Fig. 2, iron core column
102 cross sections are polygon trapezium structure, and series is 13 grades, as shown in figure 3, the profile of the polygon trapezium structure is one approximate
Circle, as shown in Figure 3 or Figure 4, it is 270mm that can further calculate out (or measuring) the polygon trapezoidal approximate circular diameter, i.e.,
The approximate circular diameter of 102 cross section of iron core column is 270mm, and the cross section of iron yoke 103 is rectangle in iron core 101.
In another scheme, iron core column lamination 102-1 and iron yoke lamination 103-1 are formed by silicon steel plate stacking, silicon steel
The thickness of piece is 0.3 millimeter.Package parts 301 divide for upper and lower two parts, and the top of package parts 301 is located at for encapsulating
The iron yoke 103 of top, the lower part of package parts 301 is for encapsulating underlying iron yoke 103；Package parts 301 upper and lower two
Divide and linked together with 6 groups of drawing screw rods 302, realizes the fixation of iron core 101；Iron core 101 is fixed and sealed using package parts 301
For design sketch after dress as shown in figure 5, iron core 101 is packaged after the fixation of component 301, iron yoke 103 is entirely encapsulated in inside,
Convenient for setting winding 201 at iron core column 102.
In the present embodiment, remaining parameter of the machine car transformer is：Rated capacity 6456KVA, rated voltage
25000V, dielectric level LI75AC35/LI-AC 5；
Silicon steel sheet trade mark 30Q120, laminate patch coefficient 0.97.
It can be seen from the above, iron core column 102 diameter D=270mm, series n=13, most large stretch of width 260mm, 103 height of iron yoke=
220mm always folds thickness 264mm.According to the relationship of 102 series of iron core column and 101 diameter of iron core in design of transformer principle, iron core
101 diameters are in 270-290mm, series n=11, and the machine car transformer series has more two-stage, illustrates in this transformer, become
The utilization of depressor inner space is more abundant, is conducive to improve 101 fill factor of iron core, is used so as to effectively improve locomotive
The power density of transformer.
According to space filling factor formula：
It is found that when 101 series of iron core is more, fill factor is higher, and space utilization effect is good, and leakage field is also less；And it leaks
The reduction of magnetic advantageously reduces the eddy-current loss of winding 201 during transformer converges, and to effectively reduce copper loss, limits stray field
The induced potential that 201 conducting wire of middle winding generates, to effectively improve the copper foil density of winding 201 so that transformer efficiency is close
Degree is improved.Therefore, it is the power density for further probing into the transformer, needs leakage field and vortex damage to transformer
Consumption is calculated.
Further, in the present embodiment, since the iron core column 102 of iron core 101 is multilevel shape, iron yoke 103 is rectangle, root
According to formula：
Iron core column section：AtN* grades of thickness * laminate patch coefficients of=Σ series；
Iron yoke section：Ae=always fold the high * laminate patches coefficient of thickness * iron yokes；
Angle weight：GΔ=2* stem section Ast* the high H of iron yokee* silicon steel sheet proportion；
It can obtain：
Iron core column section At=32.336cm2, iron yoke section Ae=563.376cm2, estimation flux density Bm=1.5T, iron core column
Magnetic flux density Bt=1.517T, iron yoke magnetic flux density Be=1.433T, iron core column specific loss Pt=0.8521W/kg, iron yoke list
Bit loss consumes Pe=0.7513W/kg, the excitatory capacity q of iron core column unitt=1.0797VA/kg, qδt=2.1191VA/cm2, iron yoke list
The excitatory capacity q in positione=0.9258VA/kg, qδe=1.558VA/cm2；
Technological coefficient Ko=1.3, angle weight GΔ=179.2kg, iron yoke weight Ge=602.7kg, iron core column weight Gt=716.7kg,
Therefore iron core weight GFe=1499kg.
No-load loss：Po=Kpo*[(Gt+GΔ/2)*Pt+(Ge+GΔ/2)*Pe]=2052W,
Wherein, no-load loss COEFFICIENT KpoValue 1.7；
Core loss current：Ioy=Po/(10*Sn)=0.032%；
Magnetizing current is：
Ior=KO*[(Gt+GΔ/2)*qt+(Ge+GΔ/2)*qe+Nft*qδt*Aft+Nfe*qδeAfe]/(10*Sn)=0.112%,
No-load current：
No-load loss and no-load current are all the important indicators for characterizing transformer performance, by above-mentioned calculating it is found that this transformation
In device, no-load loss and no-load current are all very small, and the performance for being conducive to this transformer is more superior, to be conducive to obtain higher
Power density.
Winding 201 is also the important component of transformer, and in this example, the conducting wire in winding 201 is all made of NOMEX
Paper bag flat type copper wire；Due to NOMEX paper, its electrical, chemistry and mechanical integrity are high, and elasticity, flexibility, tear resistance, moisture resistance
Wet and wearability is all fine, and very acid-alkali-corrosive-resisting, will not be destroyed by insect, mould and fungi, it can be with all kinds
Class varnish, adhesive, transformer liquid, lubricating oil and refrigerant are compatible, and another NOMEX paper heat resisting temperature is high, even if temperature is high
Up to 220 DEG C, original insulation performance is still maintained, the performance of transformer can be improved using NOMEX paper bags flat type copper wire, and improving can
By property and safety.Further, in the present embodiment, it is both provided with winding in two iron core columns 102 in iron core 101
201, and winding 201 is using concentric type, as shown in Figure 6, wherein internal layer be low pressure (close to the part of iron core column 102) around
Group 202, outer layer (part far from iron core column 102) is high-voltage winding 203；Winding 201 is divided into along the axis direction of iron core column 102
Upper and lower two layers, to form the agent structure of 201 quadripartion machine car transformer of double winding, specifically,
Single screw structure may be used in low pressure winding 202, and continuous structure may be used in high-voltage winding 203.Low pressure around
It is alternating expression that both winding methods of group 202 and high-voltage winding 203, which can be considered as coil windings 201, can reduce leakage field
It generates, reduces by 201 added losses of winding, especially eddy-current loss.
Low pressure winding 202 includes 6 layers of low-voltage coil, and conducting wire is alternating expression line cake structure, and 1-5 layer conductor the number of turns is the 9, the 6th
Layer conductor the number of turns is 8, and low-pressure side conducting wire total number of turns is 53, and oil duct gap 2.25mm between conducting wire, conducting wire is lifted one's head for 2 conducting wires simultaneously
Around conducting wire lifts one's head direction for X-direction；Oil duct plays a part of insulation, cooling, heat dissipation, is connect in this way, being on the one hand conducive to coil
On the other hand line is conducive to keep the performance of transformer more stable, and obtains higher power density.
High-voltage winding 203 includes 30 layers of high-tension coil, and conducting wire is alternating expression line cake structure, and 1-29 layer conductor the number of turns is 47,
30th layer conductor the number of turns is 31, and high-pressure side conducting wire total number of turns is 1394, gap 0.48mm between every group of conducting wire, is set between every 2 layer conductor
Set an oil duct, oil duct gap is 2.25mm, and conducting wire is lifted one's head to be wrapped for 1 conducting wire, and conducting wire direction of lifting one's head is X to Y-direction each one.
As shown in fig. 7, between the top of upper layer winding 201, two layers of winding 201 and bottom of lower layer's winding 201 is all provided with
It is equipped with insulating end ring 212, insulating end ring 212 is used for isolated windings 201, plays the purpose of insulation；Wherein, top insulating end ring
212 thickness 28mm are enclosed at 212 thickness 18mm, bottom insulation end, and it is 34mm that 212 thickness are enclosed at intermediate insulation end；The thickness of insulating end ring 212
Degree is bigger, and insulation effect is better, but the inside transformer space that corresponding insulating end ring 212 occupies is bigger, so meeting
In the case of space requirement, it can suitably increase the thickness of insulating end ring 212.
In low pressure winding 202：6 groups of insulating end rings 212 are arranged in coil upper and lower ends, between low-voltage coil and high-tension coil
Insulation is by low-pressure side to high-pressure side successively by 3.25mm oil ducts, 5mm paper webs, 3.25mm oil ducts, 5mm paper webs, 3.25mm oil duct structures
At；In high-voltage winding 203：Coil upper and lower ends set 30 groups of insulating end rings 212；Insulation effect between coil is good, is conducive to subtract
Small leakage field, to effectively improve power density.
As shown in figure 8, in the present embodiment, using alternating expression loop construction, i.e. high-voltage winding 203 and low pressure winding
202 use the structure for the arrangement that intermeshes in an axial direction, can reduce leakage field, thus can reduce electromagnetic force and added losses, have
Conducive to the power density of raising raising machine car transformer.In alternating expression loop construction, X phases：In first low pressure winding 204
Coil winding-direction to the left, lift one's head in lower part by conducting wire；Coil winding-direction in second low pressure winding 205 to the right, lift one's head on top by conducting wire.The
To the right, conducting wire is lifted one's head, and primary side is downward, and secondary side is to the right for coil winding-direction in one high-voltage winding 208；Line in second high-voltage winding 209
Circle is around to the left, and conducting wire is lifted one's head, and primary side is upward, and secondary side is to the right.Y phases：Coil winding-direction in third low pressure winding 206 to the right, conducting wire
Lift one's head in lower part；Coil winding-direction in 4th low pressure winding 207 to the left, lift one's head on top by conducting wire.In third high-voltage winding 210
To the left, conducting wire is lifted one's head, and primary side is downward, and secondary side is to the left for coil winding-direction；To the right, conducting wire goes out coil winding-direction in 4th high-voltage winding 211
Head primary side is upward, and secondary side is to the left.
Usually there is leakage field phenomenon in transformer, wherein since 201 conducting wire of winding is in stray field, by the leakage field line of force
Institute's linkage will then generate vortex, this vortex flow when institute so will generate induced potential inside conducting wire inside conducting wire
The resistance loss of generation is exactly conducting wire eddy-current loss, and the stray field in transformer is commonly divided into vertical and horizontal stray field, and one
As in the case of based on longitudinal stray field, corresponding conducting wire eddy-current loss also has caused by longitudinal leakage field and lateral leakage field
Caused two kinds of loss, using following formula, can carry out correlation computations also based on longitudinal be lost.
Copper conductor unit mass longitudinal turbulence is lost：
Winding mean unit quality longitudinal turbulence is lost：
Entirely winding conducting wire eddy-current loss is：Pe,75=Pe,75℃*G
Conducting wire unit mass longitudinal turbulence loss is expressed as with the basic copper loss percentage of unit mass：
Wherein,
In above-mentioned formula, a be with the perpendicular conductor width of longitudinal leakage field, j is current density.
According to above-mentioned formula, the relevant parameter in transformer involved in the present embodiment can be calculated；
In low-voltage coil：The capacity of winding is 6456KVA, and voltage 950V, circle voltage is 17.9245V, and electric current is
1699A, coil turn 53, conductor cross-section 257.08mm2, current density j=6.61A/m2, a length of 1.15m of average turn, always
A length of 63.4m, resistance value R=0.006029 Ω at 120 DEG C, basic copper loss are 9604W, wire weight G=599kg, winding
Reactance height Hk=321.72mm, maximum longitudinal direction leakage flux B=0.193T, eddy current loss factor 229, eddy-current loss are
266W。
In high-tension coil：The capacity of winding is 6456KVA, and voltage 25000V, circle voltage is 17.9245V, and electric current is
64.56A, coil turn 1394, conductor cross-section 9.165mm2, current density j=7.044A/m2, a length of 1.83m of average turn,
Overall length is 2550m, and resistance value R=6.803 Ω at 120 DEG C, basic copper loss is 113419W, wire weight G=848kg, winding
Reactance height Hk=341.8mm, maximum longitudinal direction leakage flux B=0.193T, eddy current loss factor=229, eddy-current loss=
382W。
The leakage field that the transformer generates it can be seen from above-mentioned parameter is minimum, and eddy-current loss is also compared to basic copper loss
Minimum, so that this transformer device structure meets the technology requirement of large capacity, lightweight and high reliability, there is higher work(
Rate density.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replace, it should be covered within the scope of the utility model.
Claims (10)
1. a kind of machine car transformer, which is characterized in that including iron core, package parts and winding, the iron core by iron core column and
Iron yoke constitutes heart type structure, and the fixation and encapsulation of iron core are carried out using the package parts, the iron core column and iron yoke difference
It is overrided to form by iron core column lamination and iron yoke lamination, iron core column cross section is in polygon trapezium structure, and approximate circular diameter is between 270
When between millimeter and 290 millimeters, the series of iron core column is more than 11 grades；The winding includes low pressure winding and high-voltage winding, winding
Using concentric type, and winding is divided into upper and lower two layers along the axis direction of iron core column, forms double winding quadripartion structure；Upper layer around
The top of group, between two layers of winding and bottom of lower layer's winding are both provided with insulating end ring, and the insulating end ring is for insulating.
2. machine car transformer according to claim 1, which is characterized in that the iron core column and iron yoke are joined by size respectively
Number is that the iron core column lamination of ten three grades and iron yoke lamination are overrided to form, and iron core column cross section is 270 millimeters like circular diameter,
Series is 13 grades.
3. machine car transformer according to claim 2, which is characterized in that the iron core column lamination and iron yoke lamination are
It is formed by silicon steel plate stacking, the thickness of the silicon steel sheet is 0.3 millimeter.
4. machine car transformer according to claim 3, which is characterized in that the conducting wire for forming winding is that NOMEX paper bags are flat
Copper wire.
5. machine car transformer according to claim 4, which is characterized in that in the winding, internal layer is low pressure winding, outside
Layer is high-voltage winding.
6. machine car transformer according to claim 5, which is characterized in that low pressure uses single screw structure, high pressure to adopt
Use continuous structure.
7. according to any machine car transformers of claim 1-6, which is characterized in that the insulation at the top of the upper layer winding
End circle thickness is 18 millimeters, and the insulating end ring thickness of lower layer's winding bottom is 28 millimeters, the insulating end between upper layer and lower layer winding
It is 34 millimeters to enclose thickness.
8. machine car transformer according to claim 7, which is characterized in that in the low pressure winding：Coil upper and lower ends
6 groups of insulating end rings are set, the insulation between low-voltage coil and high-tension coil by low-pressure side to high-pressure side successively by 3.25mm oil ducts,
5mm paper webs, 3.25mm oil ducts, 5mm paper webs, 3.25mm oil ducts are constituted；In the high-voltage winding：Coil upper and lower ends set 30 groups it is exhausted
Acies circle.
9. machine car transformer according to claim 8, which is characterized in that the low pressure winding includes 6 layers of low-voltage coil,
Conducting wire is alternating expression line cake structure, wherein 1-5 layer conductor the number of turns is that the 9, the 6th layer conductor the number of turns is 8, and oil duct gap is between conducting wire
2.25mm, conducting wire lift one's head for 2 conducting wires and around.
10. machine car transformer according to claim 9, which is characterized in that the high-voltage winding includes 30 floor height crimpings
Circle, conducting wire are alternating expression line cake structure, and 1-29 layer conductor the number of turns is that the 47, the 30th layer conductor the number of turns is 31, gap between every layer conductor
An oil duct, oil duct gap 2.25mm are arranged between every 2 layer conductor by 0.48mm, and conducting wire is lifted one's head to be wrapped for 1 conducting wire.
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| CN201721864662.9U CN207704998U (en) | 2017-12-27 | 2017-12-27 | A kind of machine car transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010683A (en) * | 2017-12-27 | 2018-05-08 | 北方民族大学 | A kind of machine car transformer |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010683A (en) * | 2017-12-27 | 2018-05-08 | 北方民族大学 | A kind of machine car transformer |
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| CF01 | Termination of patent right due to non-payment of annual fee |