CN208655371U - Dual input AC transformer - Google Patents
Dual input AC transformer Download PDFInfo
- Publication number
- CN208655371U CN208655371U CN201821073851.9U CN201821073851U CN208655371U CN 208655371 U CN208655371 U CN 208655371U CN 201821073851 U CN201821073851 U CN 201821073851U CN 208655371 U CN208655371 U CN 208655371U
- Authority
- CN
- China
- Prior art keywords
- input
- input coil
- transformer
- coil
- phase
- 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.)
- Active
Links
Abstract
Dual input AC transformer, it includes the single-phase input output device of a pair of of transformer core (1) and its setting on a pair of of transformer core (1), single-phase input output device includes first input coil (3), second input coil (4) and output winding (5), first input coil (3) and the second input coil (4) are respectively wound around on the wrapping post of a pair of of transformer core (1), output winding (5) is wrapped in first input coil (3) and the second input coil (4), output winding (5) passes through a pair of of transformer core (1) and first input coil (3), second input coil (4) carries out electromagnetic coupling；Advantage is: dual input AC transformer is made of iron core and coil, is avoided using power electronic devices, first is that capacity can do it is larger, second is that having stronger impact resistance, third is that the reliability of itself is secure, fourth is that long service life, fifth is that voltage can do it is higher.
Description
Technical field
The utility model relates to field of electromechanical equipment, and in particular to dual input AC transformer.
Background technique
Currently, industrial and mining enterprises' electric system has the following problems:
One, power supply reliability: the industries such as petrochemical industry, steel, glass, electronics, the requirement to power supply reliability is very high,
Especially some of key equipments or system are even the voltage fluctuation for very short time occur all may cause large effect.This
A bit to the higher industry of power reguirements, two sets of independent power supplys are commonly equipped with, so-called is independently exactly that relevance is not strong, is had a power failure simultaneously
Probability it is extremely low.This two sets of independent current sources are usually high voltage power supply, such as: 110kV, after their Entry Firms, usually band respectively
Load is switched to another electricity by mother prepared auto restart or fast switching device when one of power outage or larger fluctuation
Source.Although this switching is very fast, due to being break-before-make, still there is interruption process, some more sensitive is set
It standby (such as: blind controller system, frequency converter) and controls and interlocks for more complicated system, this switching bring wave
Dynamic is unacceptable；
Problem above can be solved to a certain extent by becoming output by two-way rectification another mistake using power electronic devices, but
It is there are two its maximum problems: first is that capacity is difficult to do larger, second is that impact resistance is poor, is especially not suitable for having electricity
The place of engine start.
Two, large capacity motor adjust the speed: in industrial and mining enterprises the effect of pump variable speed energy saving clearly, general speed regulation hand
Section has frequency control, fluid coupling speed regulation and permanent-magnet slip speed regulation etc..Wherein low voltage frequency converter is due to its technology maturation, operation
Stablize, sexual valence is relatively high has obtained extensive utilization, but high-voltage frequency converter is due to the limit of its electric and electronic power original part voltage
System, needs multicomponent series operation, and failure rate is higher, and price is also higher, and the speed regulation of large capacity motor is according to in-site installation sky
Between etc. actual conditions, a part selection fluid coupling speed regulation and permanent-magnet slip speed regulation.But fluid coupling speed regulation and permanent magnetism
Slip regulating speed still belongs to energy consumption speed regulation, and efficiency is lower.
Frequency control is needed to configure with motor with the capacity even frequency converter of big one to two grades of capacity, but general effect
For preferable economize on electricity power also only 20% ~ 30% or so, most of capacity of expensive frequency converter does not play energy-conserving action.
Three, large capacity motor starts: with the development of national economy, the industry sizes such as petrochemical industry, metallurgy are more next big,
The capacity of single unit is also increasing, and the starting of high capacity motor becomes a problem.Big motor commonly starts at present
Mode has: frequency converter soft start, the across-the-line starting of transformer motor unit, soft-start by lowering voltage, drop compensation soft start etc..
Summary of the invention
The purpose of this utility model provides dual input AC transformer aiming at above-mentioned deficiency,
The utility model it include that a pair of of transformer core and its single-phase input being arranged on a pair of of transformer core are defeated
Device out, single-phase input output device include first input coil, the second input coil and output winding, first input coil and
Second input coil is respectively wound around on the wrapping post of a pair of of transformer core, and output winding is wrapped in first input coil and
On two input coils, output winding passes through a pair of of transformer core and first input coil, the second input coil carry out electromagnetism coupling
It closes.
It includes a pair of of transformer core and its three-phase input output device being arranged on a pair of of transformer core, three-phase
Input/output unit includes A wrapping post, B wrapping post and the C that the first transformer fe in-core on a pair of of transformer core is equipped with
Wrapping post and the second transformer fe in-core the A wrapping post, B wrapping post and the C wrapping post that are equipped in a pair of of transformer core,
It is wound with A input coil on A wrapping post, B input coil is wound on B wrapping post, it is defeated to be wound with C on C wrapping post
Entering coil, A input coil, B input coil are identical with the number of turns of C input coil,
It is wound with A input coil on A wrapping post, B input coil is wound on B wrapping post, it is defeated to be wound with C on C wrapping post
Entering coil, A input coil, B input coil are identical with the number of turns of C input coil,
A output winding is wrapped on A input coil and A input coil, and B output winding is wrapped in B input coil and B input
On coil, C output winding is wrapped on C input coil and C input coil, A output winding, B output winding and C output winding
The number of turns is identical.
The utility model advantage is: dual input AC transformer is made of iron core and coil, is avoided using power electronics device
Part, first is that capacity can do it is larger, second is that have stronger impact resistance, third is that the reliability of itself is secure, fourth is that
Long service life, fifth is that voltage can do it is higher.The utility model can be used for improving power supply reliability, large capacity motor
Speed regulation and large capacity motor starting etc..
In terms of improving power supply reliability: this transformer is there are two input and an output, two inputs when normal operation
Power supply works at the same time, common powering load, as long as two inputs do not have a power failure or fluctuate simultaneously, it is ensured that output is not in
Interruption or the fluctuation beyond allowed band；Since there is no this process of break-before-make, only from two power supply power supplies to one
The transient process of power supply power supply, load voltage ripple are very small；For the place with two sets of independent current sources, this lose-lose is used
Enter AC transformer to crucial sensitive equipment or system power supply, power-off risk will can be greatly reduced, and be able to maintain this two
The independence of a power supply.
In terms of large capacity motor speed regulation: technology maturation, cheap smaller can be used using the utility model
The low voltage frequency converter of capacity drives high-voltage large-capacity motor.
In terms of large capacity motor starting: the utility model provides a kind of high-voltage large-capacity motor starting scheme,
On the one hand transformer motor unit, decompression and compensation is combined to start；On the other hand since resistance, reactor and capacitor etc. drop
Pressure and compensation equipment are not to connect in a conventional manner in the high input voltage side of motor, the neutral point formed using star connection
It can be grounded, the class of insulation of equipment can be done lower.
Detailed description of the invention
Fig. 1 is the utility model dual input AC transformer device structure schematic diagram.
Fig. 2 is the utility model Fig. 1 side structure schematic view.
Fig. 3 is the utility model Fig. 2A-A schematic cross-sectional view.
Fig. 4 is the utility model dual input AC transformer circuit structural schematic diagram.
Voltage vector schematic diagram when Fig. 5 is the work of the utility model dual input AC transformer.
Fig. 6 is the schematic cross-sectional view of the utility model three-phase dual input AC transformer.
Fig. 7 is the schematic symbol diagram of the utility model three-phase dual input AC transformer.
Fig. 8 is that the utility model three-phase dual input AC transformer is shown using frequency converter VFD what motor M was adjusted the speed
It is intended to.
Fig. 9 is that the utility model three-phase dual input AC the second input coil of transformer access capacitor C forms transformer electricity
Motivation M group drop compensation soft start schematic diagram.
Specific embodiment
As shown in the picture, the utility model it include a pair of of transformer core 1 and its be arranged on a pair of of transformer core 1
Single-phase input output device, single-phase input output device includes first input coil 3, the second input coil 4 and output winding
5, first input coil 3 and the second input coil 4 are respectively wound around on the wrapping post of a pair of of transformer core 1, and output winding 5 twines
It is wound in first input coil 3 and the second input coil 4, output winding 5 passes through a pair of of transformer core 1 and first input coil
3, the second input coil 4 carries out electromagnetic coupling.
It includes a pair of of transformer core 1 and its three-phase input output device that is arranged on a pair of of transformer core 1, and three
Phase input/output unit includes A1 wrapping post 311, the B1 being equipped in the first transformer core 8 on a pair of of transformer core 1
Wrapping post 312 and C1 wrapping post 313 and the A2 wrapping post being equipped in the second transformer core 9 of a pair of of transformer core 1
321, B2 wrapping post 322 and C2 wrapping post 323,
It is wound with A1 input coil 314 on A1 wrapping post 311, B1 input coil 315, C1 is wound on B1 wrapping post 312
C1 input coil 316, the circle of A1 input coil 314, B1 input coil 315 and C1 input coil 316 are wound on wrapping post 313
Number is identical,
It is wound with A2 input coil 324 on A2 wrapping post 321, B2 input coil 325, C2 is wound on B2 wrapping post 322
C2 input coil 326, the circle of A2 input coil 324, B2 input coil 325 and C2 input coil 326 are wound on wrapping post 323
Number is identical,
A output winding 331 is wrapped on A1 input coil 314 and A2 input coil 324, and B output winding 332 is wrapped in B1
On input coil 315 and B2 input coil 325, C output winding 333 is wrapped in C1 input coil 316 and C2 input coil 326
On, A output winding 331, the number of turns of B output winding 332 and C output winding 333 are identical.
Working method and application thereof: there are two the iron core and input coil of transformer, output lines for dual input AC transformer
Circle while two input coils for having coupled this two transformers, output voltage are the vector sum of two input voltages.
The first purposes of the utility model: it can be used for improving power supply reliability, the number of turns phase of two input coils 3,4
Deng both n1=n2, two input powers of a corresponding output winding 5 cannot same phase, phase angle should be 120 °, for three-phase lose-lose
Enter AC transformer, also to guarantee that two inputs, the phase sequence of an output are identical.There can be no any one when transformer works
The case where input pull-down, needs in components such as two input terminal access capacitor C.As long as two exchange inputs do not stop simultaneously
Electricity, exchange output would not have a power failure, and keep output voltage amplitude identical.
If two input supply voltages are consistent, then two input coil the number of turns of single-phase dual input AC transformer are identical, no
It then needs to adjust turn ratio, when making any input power power supply in no-load transformer, output voltage amplitude is identical.
The physical cabling case of single-phase dual input AC transformer is as shown in Figure 4.First input coil 3, input voltage
For U1, it is assumed that access be three phase mains a phase, i.e. Ua, the voltage that it is induced in output winding 5 is U1 ', i.e. Ua '；Second
Input coil 4, input voltage U2, access power supply cannot be with the same phase of U1, it is assumed that access be three phase mains b phase,
That is Ub, it is U2 ', i.e. Ub ' in the voltage that output winding 5 induces；Voltage U=U1 '+U2 ' of output winding 5, in this case
Middle U=Ua '+Ub '=- Uc '.
Fig. 5 be single-phase dual input AC transformer work when voltage vector-diagram, it describe U in this case, U1 ',
Phase and size relation between U2 ', Ua ', Ub ' and Uc ', an emphasis are that their sizes are equal.When two input electricity
A power failure in source, is assumed to be U2, i.e. U2=0 in this case, then output U=Ua ', that is to say, that single-phase dual input is handed over
A power failure in two input powers of convertor transformer, output voltage amplitude is constant, there is the transient process of a phase change.
In this transient process, output voltage U will be along Fig. 5 middle conductor L1(Ub ') opposite direction of arrow is mobile, also
It is that U2 ' (Ub ') gradually becomes smaller until being 0, output voltage U becomes Ua ' from-Uc '.In this transient process, output voltage U's
Amplitude minimum is not less than 86.7%, this numerical value is higher than system residual voltage under the dash current when checking high capacity motor and starting
Permissible value 85%.
When single-phase dual input AC transformer works, especially output on-load when, the feelings that do not allow input pull-down occur
Condition, if this occurs, in the input terminal of open circuit, there may be dangerous high pressures, and output voltage will not ensure that.For
It prevents the appearance of such case, has accessed the capacitor 6 of certain capacity in two input terminals in present case.
Three-phase dual input AC transformer is similar with single-phase dual input AC transformer device structure, and only the number of phases is become from single-phase
Three-phase, it can be understood as be made of three single-phase dual input AC transformers.
The structure chart and graphical diagram of three-phase dual input AC transformer are as shown in Figure 6.Three-phase dual input AC transformer
Iron core is made of the iron core of two sets of three-phase three-limb transformers, and three columns of first set iron core are respectively 311,312 and 313, the
Three columns of two sets of iron cores are respectively 321,322 and 323.Three input coils of first set iron core are respectively 314,315 and
316, three input coils of second set of iron core are respectively 324,325 and 326, and such as two input supply voltages are consistent, then three-phase
Two input coil the number of turns of dual input AC transformer are identical, otherwise need to adjust turn ratio, make any in no-load transformer
When input power is powered, output voltage amplitude is identical.Three output windings are 331,332 and 333 respectively.
Three-phase dual input AC transformer is there are two the iron core and input coil of three-phase transformer, and output winding split-phase is simultaneously
Two single-phase input coils of this two transformers are coupled.Then its each phase output voltage U is two with no-load voltage ratio relationship
The vector sum of input voltage, both。
In present case three-phase dual input AC transformer first set input coil access voltage it is separate for U1a, U1b and
U1c, separate second set of input coil access voltage is U1b, U1c and U1a, and the separate of output voltage is U1c, U1a and U1b.Two
A input is identical with the phase sequence that one exports, it is ensured that will not invert in the motor M load of a power outage when institute band.
As not allowing input pull-down when the work of single-phase dual input AC transformer, three-phase dual input AC transformer
When work, when especially exporting on-load, do not allow the case where input pull-down occur, if this occurs, in open circuit
There may be dangerous high pressures for input terminal, and output voltage will not ensure that.The appearance of such case in order to prevent, can be two
A input terminal has accessed the three-phase capacitor of certain capacity.
Second of purposes of the utility model: can be used for large capacity motor speed regulation, and output meets motor M；Two inputs
One of them of coil connects conventional AC power, referred to as power frequency coil；Another one input coil connects variable-frequency power sources, referred to as
For frequency conversion coil.The revolving speed of low pressure low capacity frequency converter VFD control high-voltage large-capacity motor M can be used, effect is can be with
Greatly reduce the corresponding frequency converter VFD power of motor M.
There are two the iron core and input coil of three-phase transformer, output windings to couple simultaneously for three-phase dual input AC transformer
Two input coils of this two transformers, output voltage are the vector sum of two input voltages.Then its output voltage U is
The vector sum of two input voltages with no-load voltage ratio relationship, both。
Instantaneous value U=Um Sin(ω t+ а of sinusoidal voltage)
ω=2πf
U=Um Sin(2 π f t+ а)
U: alternating voltage instantaneous value
Um: alternating voltage maximum value
ω: angular frequency
а: initial phase
F: frequency
If the alternating voltage that motor M needs is U=Um Sin(2 π f t+ а)
Input voltage is fixed U1=Um1Sin(2 π f1 t+а1)
Therefore the output voltage of frequency converter VFD should be
Frequency converter VFD needs to acquire power frequency supply U1Voltage, frequency and phase, input motor M required voltage and frequency U, root
It is the voltage waveform U that can determine frequency converter VFD and should export according to above formula2。
The physical cabling case of three-phase dual input AC transformer is as shown in Figure 8.First input coil, input voltage are
U1, access is three phase worker power.Second input coil accesses frequency converter VFD power supply U2, defeated in frequency converter VFD and second
Enter and needs to access sine wave filter 7 between coil.The voltage that output winding induces is U, as described above, output voltage
U, which is one, can according to need the frequency conversion output for controlling its voltage, frequency and its initial phase, can adjust the speed to motor M.
The third purposes of the utility model: can be used for large capacity motor soft start, and output meets motor M；Two defeated
One of them for entering coil connects conventional AC power, referred to as actuating coil；Another one input coil does not connect power supply, only connects
Enter the impedors such as resistance, reactance or capacitor, referred to as potential coil, drop soft start constituted when accessing resistance or reactance,
Drop compensation soft start is constituted when accessing capacitor；Potential coil is shorted after the completion of starting.Dual input AC transformer is soft
The physical cabling case of starting is as shown in Figure 9.First input coil, input voltage U1；Second input coil, voltage U2
Incude for output winding to the electric current on the second input coil and is formed by capacitor C, direction and U1On the contrary；Output winding
Voltage,
When motor M is started, since starting current is larger, the electric current incuded in the second input coil is larger, electric current
The voltage formed on resistance, reactance or the capacitor accessed on the second input coil is larger, this voltage and the first input line
Voltage-phase on circle is on the contrary, therefore be added in the voltage on motor MPlay the work of decompression
With.If that access in the second input coil is capacitor C, capacitor C can also export reactive current to motor M, help electricity
The starting of motivation M forms drop compensation soft start.It needs for resistance to be shorted after proceed-to-send, eliminates and be lost, and capacitor C
It can not be shorted, lesser capacity current is persistently provided, is beneficial to energy conservation.If the first of this dual input AC transformer inputs
Coil is consistent with the no-load voltage ratio of output winding, both n=n1, then dual input AC transformer can be exited after proceed-to-send to subtract
Few loss.
Claims (2)
1. dual input AC transformer, it is characterised in that it includes a pair of of transformer core (1) and its is arranged in a pair of of transformer
Single-phase input output device on iron core (1), single-phase input output device include first input coil (3), the second input coil
(4) and output winding (5), first input coil (3) and the second input coil (4) are respectively wound around a pair of of transformer core (1)
Wrapping post on, output winding (5) is wrapped in first input coil (3) and the second input coil (4), and output winding (5) is logical
It crosses a pair of of transformer core (1) and first input coil (3), the second input coil (4) carries out electromagnetic coupling.
2. dual input AC transformer, it is characterised in that it includes a pair of of transformer core (1) and its is arranged in a pair of of transformer
Three-phase input output device on iron core (1), three-phase input output device include the first change on a pair of of transformer core (1)
The A1 wrapping post (311), B1 wrapping post (312) and the C1 wrapping post (313) that are equipped in depressor iron core (8) and in a pair of of transformer
A2 wrapping post (321), B2 wrapping post (322) and the C2 wrapping post (323) being equipped in the second transformer core (9) of iron core (1),
It is wound on A1 wrapping post (311) A1 input coil (314), B1 wrapping post is wound with B1 input coil on (312)
(315), be wound with C1 input coil (316) on C1 wrapping post (313), A1 input coil (314), B1 input coil (315) and
The number of turns of C1 input coil (316) is identical,
It is wound on A2 wrapping post (321) A2 input coil (324), B2 wrapping post is wound with B2 input coil on (322)
(325), be wound with C2 input coil (326) on C2 wrapping post (323), A2 input coil (324), B2 input coil (325) and
The number of turns of C2 input coil (326) is identical,
A output winding (331) is wrapped on A1 input coil (314) and A2 input coil (324), B output winding (332) winding
On B1 input coil (315) and B2 input coil (325), C output winding (333) is wrapped in C1 input coil (316) and C2
On input coil (326), A output winding (331), B output winding (332) are identical with the number of turns of C output winding (333).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821073851.9U CN208655371U (en) | 2018-07-09 | 2018-07-09 | Dual input AC transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821073851.9U CN208655371U (en) | 2018-07-09 | 2018-07-09 | Dual input AC transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208655371U true CN208655371U (en) | 2019-03-26 |
Family
ID=65783184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821073851.9U Active CN208655371U (en) | 2018-07-09 | 2018-07-09 | Dual input AC transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208655371U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509617A (en) * | 2018-07-09 | 2019-03-22 | 陈晓标 | Dual input AC transformer |
| CN109509617B (en) * | 2018-07-09 | 2024-04-26 | 陈晓标 | Double-input alternating current transformer |
-
2018
- 2018-07-09 CN CN201821073851.9U patent/CN208655371U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509617A (en) * | 2018-07-09 | 2019-03-22 | 陈晓标 | Dual input AC transformer |
| CN109509617B (en) * | 2018-07-09 | 2024-04-26 | 陈晓标 | Double-input alternating current transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201146390Y (en) | Electromagnetic balance electricity economizer | |
| CN103248009A (en) | Longitudinal differential protection current phase compensation method for YNd5 transformer | |
| WO2014169618A1 (en) | Joint regulator test device for magnetically controlled shunt reactor | |
| CN204068804U (en) | A kind of many power AC asynchronous motor control device | |
| CN103178527B (en) | Voltage deviation adjustor | |
| CN104253412A (en) | YNd11 transformer longitudinal differential protection current phase compensation method | |
| CN208655371U (en) | Dual input AC transformer | |
| CN207427022U (en) | A kind of intelligent load-balancing device | |
| CN103872854B (en) | Asynchronous motor voltage transforming circuit | |
| CN104167715A (en) | YNd5 transformer longitudinal differential protection current phase compensation method | |
| CN109509617A (en) | Dual input AC transformer | |
| CN204348495U (en) | A kind of polysilicon dry-type transformer | |
| CN109509617B (en) | Double-input alternating current transformer | |
| CN105470969A (en) | Capacitive AC voltage regulating device, power supply equipment and AC voltage regulating method | |
| CN205211561U (en) | High pressure star angular transformation on -load voltage -regulating transformer's winding wiring structure | |
| CN113315149B (en) | Scott transformer and use method thereof | |
| CN104184121A (en) | YNd9 transformer longitudinal differential protection current phase compensation method | |
| CN203277069U (en) | Novel electric energy optimizing machine | |
| CN204289045U (en) | A kind of multi-functional winding construction for transformer | |
| CN105048464A (en) | Magnetic balanced harmonic elimination reactive compensation device and method | |
| CN203911673U (en) | Asynchronous motor voltage mutual inductance circuit and asynchronous motor current mutual inductance circuit | |
| CN203193283U (en) | Voltage deviation regulator | |
| CN109617081A (en) | A kind of the homo-phase traction power supply unit and system of three-phase electric equilibrium input single-phase electricity output | |
| CN204928139U (en) | Magnetic balance harmonic elimination reactive power compensator | |
| CN203871944U (en) | Motor with additional inductance coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |