CN208580654U - A kind of three-phase step-down starting transformer - Google Patents
A kind of three-phase step-down starting transformer Download PDFInfo
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- CN208580654U CN208580654U CN201821400476.4U CN201821400476U CN208580654U CN 208580654 U CN208580654 U CN 208580654U CN 201821400476 U CN201821400476 U CN 201821400476U CN 208580654 U CN208580654 U CN 208580654U
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Abstract
The utility model relates to a kind of three-phase step-down starting transformers, apertured superposition processing is carried out by setting number air-gap-free ring-type iron core, apertured cyclic annular superposition iron core is constituted, the first winding or secondary tap winding being then wrapped on the cyclic annular superposition iron core by silk-covered wire form the three-phase step-down starting transformer for being depressured to motor.It is had the gap between each air-gap-free ring-type iron core in the application in the cyclic annular superposition iron core of above-mentioned transformer, so that space is big between each air-gap-free ring-type iron core, heat dissipation area is increased, and cyclic annular superposition iron core can increase the resistance on access, reduce core loss, temperature rise is reduced, it is more preferable to realize heat dissipation effect during motor reduced voltage starting, and magnetic field strength increases, efficiency is higher, the service life is longer, and is not easy to burn, and can be to the effect of motor crawl, Fraquent start.
Description
Technical field
The utility model relates to electrical equipments, and in particular to a kind of three-phase step-down starting transformer.
Background technique
In the power system, motor is a kind of equipment for converting electrical current into mechanical energy, and electric system is mainly using exchange
Motor.There are two types of methods for electric motor starting currently on the market, first is that across-the-line starting under rated voltage, another kind is in voltage rating
Lower reduced voltage starting.The method of motor can be connected using transformer to realize motor mostly when being started with transformer pressure-reducing start mode
Reduced voltage starting.
It is the 4 of rated current if larger by the electric current of motor since directly motor being connected with three-phase alternating-current supply
~7 times, motor is easily burnt at the start, therefore step-down transformer is connected between three-phase alternating-current supply and motor, transformer
The biggish alternating voltage of input is converted into lower voltage output, the voltage for inputting motor can be made to reduce in this way, electricity
Rheology is small, is 2.5~4 times of rated current, electric motor starting is safer.Existing self-coupling decompression transformer is using reduction electric motor starting
The mode of voltage, to reduce motor starting currents.But self-coupling decompression transformer in using laminated core structure, but
The self-coupling decompression transformer of laminated core structure structure has the following disadvantages: that transformer heat dissipation is slow, and temperature rise is fast, leads to core loss
Greatly, efficiency is low, and frequent motor starting is easy to be burned out, and influences normal production work, and security performance is not high.
Utility model content
In view of this, providing a kind of step-down transformer, energy the purpose of the utility model is to overcome the deficiencies in the prior art
Enough solution heat dissipation effects during motor reduced voltage starting are bad, and magnetic field strength is low, and efficiency is low, and service life is short, easily burn, and
And cannot be to motor crawl, Fraquent start the problem of.
To solve the above problems, the utility model adopts the following technical solution:
The cyclic annular superposition iron core is made of the superposition of setting number air-gap-free ring-type iron core；Each air-gap-free ring-type iron
Apertured superposition is set as between core；
The coil includes first winding or secondary tap winding of the uniform winding on the cyclic annular superposition iron core.
Optionally, the air-gap-free ring-type iron core is rolled by cold-reduced silicon sheet air-gap-free；
Optionally, the first winding or the secondary tap winding are formed by silk-covered wire coiling；
Optionally, the internal diameter of each air-gap-free ring-type iron core and outer diameter are all the same；
Optionally, the output power of the number of the air-gap-free ring-type iron core in the cyclic annular superposition iron core and transformer
It is directly proportional；
The number of the optional coil is 3 or 6；
Optionally, the air-gap-free ring-type iron core sets number as any integer in 1~5；
Optionally, the end of incoming cables of the first winding of the coil is connect with three phase mains, the first winding of the coil
Leading-out terminal is connected to motor, regardless of phase sequence；
The end of incoming cables of the secondary tap winding of the coil is connect with three phase mains, the secondary tap winding of the coil
Leading-out terminal is connected to motor.
Optionally, the secondary tap winding terminal goes out wiretapping and second including first and goes out wiretapping；
Described first, which goes out wiretapping, is connected to motor；
Alternatively, described second go out wiretapping be connected to motor.
Technical solution provided by the present application can include the following benefits:
A kind of step-down transformer of the application carries out apertured superposition by that will set number air-gap-free ring-type iron core
Processing constitutes apertured cyclic annular superposition iron core, then by the first winding that is wrapped on the cyclic annular superposition iron core or secondary
The step-down transformer that tap winding is depressured to motor.Each air-gap-free ring in the application in the cyclic annular superposition iron core of above-mentioned transformer
It is had the gap between shape iron core, so that space is big between each air-gap-free ring-type iron core, increases heat dissipation area, and cyclic annular superposition iron core can
To increase the resistance on access, core loss is reduced, reduces temperature rise, realizes during motor reduced voltage starting heat dissipation effect more
Good, magnetic field strength increases, and efficiency is higher, and the service life is longer, and is not easy to burn.And it can be to motor crawl, Fraquent start
Effect.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the transformer that one embodiment of the application provides；
Fig. 2 is another structural schematic diagram for the transformer that one embodiment of the application provides；
Fig. 3 is the connection schematic diagram of three-phase step-down starting transformer and three phase mains and motor.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
Fig. 1 is the transformer device structure schematic diagram that one embodiment of the application provides, and wherein the end first winding A inlet wire, A1 are brought out
Line；Or the end A1 inlet wire, A brings out line, regardless of phase sequence.
Fig. 2 is another structural schematic diagram of transformer that one embodiment of the application provides, the secondary end tap winding A inlet wire, A11
Tap terminals outlet or A12 tap terminals outlet.
As shown in Figure 1, transformer device structure includes coil in the present embodiment, air-gap-free ring-type is superimposed iron core.Coil includes equal
The even first winding being wrapped on cyclic annular superposition iron core or secondary tap winding.First winding and secondary tap winding are wrapped by silk
Line coiling forms.Ring-type superposition iron core is made of the superposition of multiple air-gap-free ring-type iron cores, each air-gap-free ring-type iron core of superposition it
Between have the gap.In the present embodiment, the air-gap-free ring-type iron core is rolled by energy-efficient cold-reduced silicon sheet air-gap-free, institute
Continuously uninterrupted with silicon steel sheet, the thickness of cold-reduced silicon sheet is not unique, can preset size according to user's actual need,
Then it is cut into long matrix according to the size of iron core, it is long matrix is continuous, overlap to air-gap-free circlewise shape, form air-gap-free ring
Shape iron core, and dipping lacquer is handled, air-gap-free ring-type iron core has the consistent magnetic flux guiding of height, can reach the 95% electrical effect of height
Rate can reduce core loss.Therefore the air-gap-free ring-type iron core performance in the application is better than laminated core structure, and iron loss is small, leakage field
Small, vortex is small, and energy-efficient, load capacity is strong, and high-efficient, noiseless, temperature rise is low to wait a moment, and high current passes through in short-term for permission, makes
Valence is low, light-weight, and vibration noise is lower.
The cyclic annular superposition iron core of transformer is made of 1~5 air-gap-free ring-type iron core superposition in the application.Wherein, respectively
The internal diameter outer diameter of air-gap-free ring-type iron core is all the same, and the sectional area of each air-gap-free ring-type iron core and power of motor are at just
Than needing to set according to user to set number air-gap-free ring using the size of 1 air-gap-free ring-type iron core as standard
Shape iron core is superimposed.The number of air-gap-free ring-type iron core in specific cyclic annular superposition iron core and the output power of transformer are at just
Than.The unit number of air-gap-free ring-type iron core is a unit number there are three types of the mode of judge, an air-gap-free ring-type iron core；
0.5 air-gap-free ring-type iron core is also a unit number；1.5 air-gap-free ring-type iron cores are also considered as a unit number.It adopts
Inventory can be reduced with above-mentioned three kinds of air-gap-free ring-types iron core, production cost is saved, improves benefit.
In the present embodiment, transformer efficiency is bigger, and silk-covered wire used is thicker, and powerful transformer silk-covered wire uses 2~3
Stock silk-covered wire is connected in parallel and uniform winding is on ring-type superposition iron core, and first winding coiling forms or secondary tap winding
Coiling forms.In the present embodiment, first winding inlet wire does not consider that phase sequence, first winding only have a kind of voltage, therefore regardless of direction
User selects a kind of most suitable voltage among 65% voltage and 80% voltage as needed, as first winding inlet wire electricity
Pressure.Secondary tap winding coil has an end of incoming cables, and two leading-out terminals, there are two types of voltage tap, 65% voltages for two leading-out terminals
Head or 80% voltage head, user can only also choose one of two as needed when use, select a kind of most suitable voltage head, Bu Nengtong
When use.Primary winding coils advantage of lower cost, secondary tap winding coil turn is different, and installation is complicated, and cost is relatively
It is high.
Cyclic annular transformer in the present embodiment is superimposed by 1~5 air-gap-free ring-type iron core, and by first winding or secondary
Tap winding is entwined, cyclic annular step-down transformer by air-gap-free ring-type iron core and corresponding power silk-covered wire first winding group
At or secondary tap winding composition.The ring-type step-down transformer divides three-phase, A phase, B phase and C phase.Every phase has 1 cyclic annular change
Depressor or 2 cyclic annular transformers, and 2 cyclic annular transformer series Cheng Yixiang, first winding composition or secondary tap winding
Composition constitutes cyclic annular step-down transformer.3 or 6 cyclic annular transformers are placed in iron cabinet, and are done insulation and fixed, three-phase separate
It is vertical, three-phase step-down starting transformer is constituted, first winding is used for regardless of phase sequence wherein the coil first winding is 3 or 6
Three-phase input, the end first winding A inlet wire, A1 bring out line；Or the end A1 inlet wire, A bring out line；Or secondary tap winding is used,
The secondary end the tap winding A inlet wire, the outlet of A11 tap terminals or A12 tap terminals outlet.
In the present embodiment, the structure and connection type of the cyclic annular step-down transformer of B phase and C phase are identical as A phase, herein no longer
Additionally repeat.
Now illustrate the relationship between the power 15KW--400KW of transformer and the number of air-gap-free ring-type iron core:
(1) when transformer efficiency 40KW or less, in the application the every phase of step-down transformer by an air-gap-free ring-type iron core with
The circle silk-covered wire first winding being wrapped on the air-gap-free ring-type iron core or secondary tap winding composition, the step-down transformer point
For three-phase, every phase one, first winding end of incoming cables is connect with three phase mains, and leading-out terminal is connected to motor, regardless of phase sequence.The line
The secondary tap winding of circle, end of incoming cables are connect with three phase mains, and two tap terminals gone out in wiretapping are connected to motor.With
In reduced voltage starting.
(2) when transformer efficiency 40KW~200KW, the every phase of step-down transformer is by 2~5 air-gap-free ring-type iron in the application
The cyclic annular superposition iron core of core superposition composition be wrapped in the flat filament envelope curve first winding or secondary pumping that the ring-type is superimposed on iron core
Head winding composition, which divides three-phase, and every phase one, first winding end of incoming cables is connect with three phase mains, leading-out terminal and
Motor connection, regardless of phase sequence.The secondary tap winding of the coil, end of incoming cables are connect with three phase mains, and two go out in wiretapping
A tap terminals be connected to motor.For reduced voltage starting.
(3) when transformer efficiency 200KW or more, the ring-type superposition every phase of step-down transformer is by 2~5 air-gap-free ring-type iron cores
The cyclic annular superposition iron core of superposition composition be wrapped in the flat filament envelope curve first winding or secondary tap that the ring-type is superimposed on iron core
Winding composition, the step-down transformer divide three-phase, and every phase two, first winding end of incoming cables is connect with three phase mains, leading-out terminal and electricity
Machine connection, regardless of phase sequence.The secondary tap winding of the coil, end of incoming cables are connect with three phase mains, and two go out in wiretapping
One tap terminals is connected to motor.For reduced voltage starting.
In the present embodiment, by being formed on apertured cyclic annular superposition iron core by being wrapped in the superposition of air-gap-free ring-type iron core
A kind of step-down transformer being depressured to motor of first winding and secondary tap winding composition, is used to 380~660V electricity
Machine reduced voltage starting can be used for the motor reduced voltage starting of 1140V.Due to having the gap between air-gap-free ring-type iron core, space is big,
The heat dissipation area of the cyclic annular superposition iron core of transformer can be increased, and cyclic annular superposition iron core can increase the resistance on access,
Core loss is reduced, temperature rise is reduced, to realize that heat dissipation effect is more preferable, magnetic field strength increases, and efficiency is higher, and service life is more
It is long, and be not easy to burn, and can be to the effect of motor crawl, Fraquent start.
Further, another embodiment is also provided in the application on the basis of the said structure:
When transformer efficiency is larger, for example, being become when transformer efficiency 200KW or more by two air-gap-free ring-type iron cores
Depressor is connected into a phase, altogether three-phase, every phase 2, totally six air-gap-free toroid transformers, meanwhile, first winding end of incoming cables
It is connect with three phase mains, leading-out terminal is connected to motor, regardless of phase sequence.The secondary tap winding of the coil, end of incoming cables and three-phase
Power supply connection, two tap terminals gone out in wiretapping are connected to motor.For reduced voltage starting.
In the present embodiment, powerful transformer can change transformer using two air-gap-free ring-type transformer series
Volume reduces producting process difficulty to preferably match with power distribution cabinet, increases working efficiency, reduces production cost, and
And motor can be made to be not easy to be burned out in Fraquent start, enable the normal production work of motor, improves security performance.
Fig. 3 is the connection schematic diagram of three-phase step-down starting transformer and three phase mains and motor.As shown in figure 3,1 is three-phase
Power supply, 2 be motor.Transformer is divided into A, B, C three-phase, and input terminal is connect with three phase mains 1 respectively, the output end of transformer
A2, B2, C2 are connect with 2 stator of motor respectively, and impedance voltage can be generated when three phase mains 1 exports high current, and three-phase step-down becomes
The voltage that voltage can be divided into 2 stator of voltage and motor of transformer by depressor reaches so as to reduce the voltage on motor 2
The effect of motor reduced voltage starting.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.
The range of preferred embodiments of the present invention includes other realization, wherein can not be by shown or discussion
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be by this
The embodiment person of ordinary skill in the field of utility model is understood.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Stating may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (9)
1. a kind of three-phase step-down starting transformer, which is characterized in that including coil, ring-type superposition iron core；
The cyclic annular superposition iron core is made of the superposition of setting number air-gap-free ring-type iron core；
Apertured superposition is set as between each air-gap-free ring-type iron core；
The coil includes first winding or secondary tap winding of the uniform winding on the cyclic annular superposition iron core.
2. three-phase step-down starting transformer according to claim 1, which is characterized in that the air-gap-free ring-type iron core is by cold
Silicon steel sheet air-gap-free is rolled to roll.
3. three-phase step-down starting transformer according to claim 1, which is characterized in that the first winding is described secondary
Tap winding is formed by silk-covered wire coiling.
4. three-phase step-down starting transformer according to claim 1, which is characterized in that each air-gap-free ring-type iron core
Internal diameter and outer diameter are all the same.
5. three-phase step-down starting transformer according to claim 1, which is characterized in that the institute in the cyclic annular superposition iron core
The number for stating air-gap-free ring-type iron core is directly proportional to the output power of transformer.
6. a kind of three-phase step-down starting transformer according to claim 1, which is characterized in that the number of the coil is 3
It is a or 6.
7. a kind of three-phase step-down starting transformer according to claim 1, which is characterized in that the air-gap-free ring-type iron core
Number is set as any integer in 1~5.
8. three-phase step-down starting transformer according to claim 1, it is characterised in that
The end of incoming cables of the first winding of the coil is connect with three phase mains, the leading-out terminal and motor of the first winding of the coil
Connection, regardless of phase sequence；
The end of incoming cables of the secondary tap winding of the coil is connect with three phase mains, the outlet of the secondary tap winding of the coil
End is connected to motor.
9. three-phase step-down starting transformer according to claim 8, which is characterized in that the secondary tap winding terminal
Go out wiretapping and second including first and goes out wiretapping；
Described first, which goes out wiretapping, is connected to motor；
Alternatively, described second go out wiretapping be connected to motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821400476.4U CN208580654U (en) | 2018-08-29 | 2018-08-29 | A kind of three-phase step-down starting transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821400476.4U CN208580654U (en) | 2018-08-29 | 2018-08-29 | A kind of three-phase step-down starting transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230282412A1 (en) * | 2019-10-16 | 2023-09-07 | Phasetown, Llc | Power generating transformer system (pgts), a power factor correction method in pgts, a pgts functioning also as power supply, and block diagrams of pgts |
-
2018
- 2018-08-29 CN CN201821400476.4U patent/CN208580654U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230282412A1 (en) * | 2019-10-16 | 2023-09-07 | Phasetown, Llc | Power generating transformer system (pgts), a power factor correction method in pgts, a pgts functioning also as power supply, and block diagrams of pgts |
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