CN208767137U - A kind of pumping unit frequency conversion power transformer special - Google Patents
A kind of pumping unit frequency conversion power transformer special Download PDFInfo
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- CN208767137U CN208767137U CN201821280809.4U CN201821280809U CN208767137U CN 208767137 U CN208767137 U CN 208767137U CN 201821280809 U CN201821280809 U CN 201821280809U CN 208767137 U CN208767137 U CN 208767137U
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Abstract
The utility model discloses a kind of pumping unit frequency conversion power transformer specials, belong to above transformer technology field cabinet and is fixedly connected with case lid, case lid upper end is equipped with high pressure inlet wire binding post, cabinet is fixedly arranged at the front end with transformer case, low-pressure line-outgoing binding post is fixed in transformer case, gasket is fixed in transformer case, rectification module is fixed on the inside of gasket, outlet terminal is fixed on the outside of gasket, high-voltage coil and low-voltage coil is equipped in cabinet, iron core is equipped with inside high-voltage coil and low-voltage coil, two sides are fixedly connected with core insulation above high-voltage coil and low-voltage coil, side core insulation is fixedly connected with high pressure upper clamping piece, high pressure upper clamping piece is fixedly connected with high-voltage conducting wires folder, other side core insulation is fixedly connected with low pressure upper clamping piece, low pressure upper clamping piece is fixedly connected with primary cable folder, two sides are fixedly connected with lower clamping piece below high-voltage coil and low-voltage coil , lower clamping piece both ends are fixedly connected with feet cushion block, are fixedly connected below feet cushion block with feet insulation.
Description
Technical field
The utility model relates to transformer technology field more particularly to a kind of pumping unit frequency conversion power transformer specials.
Background technique
With the development of science and technology, pumping-unit motor frequency converter adjusts ginseng convenient, energy saving due to having, realization is facilitated to adopt
Control operation etc. is increasingly widely used.But higher hamonic wave can be led to the problem of using converter plant, will cause harmonic wave in this way
Treatment cost is high, and effect is had a greatly reduced quality, and to reduce harmonic pollution, frequency converter end of incoming cables would generally install the three of about 3% reactance amount
Phase reactor will cause frequency converter cost increase about 20% in this way.The effect for reducing harmonic wave is also ideal not to the utmost, the change that oil well is equipped with
Depressor, a usual motor are equipped with a transformer.
Utility model content
Purpose of the utility model is to solve converter plants used at present can lead to the problem of higher hamonic wave, in this way meeting
Cause harmonic wave control at high cost, effect is had a greatly reduced quality, and to reduce harmonic pollution, frequency converter end of incoming cables would generally install about 3% electricity
The three-phase reactor of anti-amount will cause frequency converter cost increase about 20% in this way.The effect for reducing harmonic wave is also preferably asked not to the utmost
Topic, and propose a kind of pumping unit frequency conversion power transformer special.
To achieve the goals above, the utility model adopts the technical scheme that
A kind of pumping unit frequency conversion power transformer special, including cabinet, the cabinet top is fixedly connected with case lid, described
Case lid upper end is equipped with high pressure inlet wire binding post, and the cabinet is fixedly arranged at the front end with transformer case, consolidates in the transformer case
Surely there is low-pressure line-outgoing binding post, gasket be fixed in the transformer case, is fixed with rectification module on the inside of the gasket,
It is fixed with outlet terminal on the outside of the gasket, high-voltage coil and low-voltage coil is equipped in the cabinet, is equipped with inside the high-voltage coil and low-voltage coil
Iron core, high-voltage coil and low-voltage coil top two sides are fixedly connected with core insulation, the side core insulation and high pressure upper clamping piece
It is fixedly connected, the high pressure upper clamping piece is fixedly connected with high-voltage conducting wires folder, and the other side core insulation and low pressure upper clamping piece are solid
Fixed connection, the low pressure upper clamping piece are fixedly connected with primary cable folder, and the high pressure upper clamping piece and the low pressure upper clamping piece are worn
It crosses case lid and is fixed on case lid, two sides are fixedly connected with lower clamping piece below the high-voltage coil and low-voltage coil, the lower clamping piece both ends
It is fixedly connected with feet cushion block, is fixedly connected below the feet cushion block with feet insulation, the feet insulation and feet are solid
Fixed connection.
Further, the body side is equipped with access hole.
Further, three face of cabinet is equipped with numerous outer cooling fins.
Further, interior cooling fin is fixed in the cabinet
Further, transformer oil is equipped in the cabinet.
Further, the gasket is fixed on inside transformer case by fixing bolt.
The usefulness of the utility model:
(1) transformer own loss is horizontal up to 13 series of country.
(2) control of harmonic current total content is within 5%, more conventional six impulse commutation 35% or so of three-phase decline 5 times with
On.Equivalent Power Factor rises to 0.95 or so by 0.65.
(3) system saving electricity improves 10% or so, and harmonic pollution problems substantially reduce.
(4) every mouthful of oil well reduces by 1000 yuan of cost or so, frequency converter reliability mentions due to that can save inlet wire filter reactor
It is high.
(5) although transformer influences within 2% frequency changer direct current bus loaded pressure drop using leakage reactance design is become,
Fully meet national standard.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic view of the front view of the utility model Fig. 1；
Fig. 3 is that the utility model Fig. 1 removes the overlooking structure diagram after case lid；
Fig. 4 is the cabinet external structure schematic diagram of the utility model Fig. 1；
Fig. 5 is the top structure schematic diagram of structure in the cabinet of the utility model Fig. 1；
Fig. 6 is the top structure schematic diagram of structure in the cabinet of the utility model Fig. 6；
Fig. 7 is the bottom substance schematic diagram of the box inner structure of the utility model Fig. 6；
Fig. 8 is the principles of the present invention schematic diagram.
In figure: 1, cabinet, 2, case lid, 3, outer cooling fin, 4, high-voltage coil and low-voltage coil, 5, iron core, 6, high pressure upper clamping piece, 7, low pressure
Upper clamping piece, 8, high-voltage conducting wires folder, 9, primary cable folder, 10, core insulation, 11, lower clamping piece, 12, feet, 13, feet cushion block,
14, feet insulate, 15, access hole, 16 high pressure inlet wire binding posts, 17 low-pressure line-outgoing binding posts, 18, interior cooling fin, 19, rectification mould
Block, 20, outlet terminal, 21, gasket, 22, fastening bolt, 23, transformer case, 24, transformer oil.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "top", "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
Referring to Fig.1-5, a kind of pumping unit frequency conversion power transformer special, including cabinet 1,1 top of cabinet and case lid 2
It being fixedly connected, 2 upper end of case lid is equipped with high pressure inlet wire binding post 16, and the cabinet 1 is fixedly arranged at the front end with transformer case 23,
It is fixed with low-pressure line-outgoing binding post 17 in the transformer case 23, gasket 21, institute are fixed in the transformer case 23
It states and is fixed with rectification module 19 on the inside of gasket 21, outlet terminal 20 is fixed on the outside of the gasket 21, is set in the cabinet 1
There is high-voltage coil and low-voltage coil 4, is equipped with iron core 5 inside the high-voltage coil and low-voltage coil 4, the 4 top two sides of high-voltage coil and low-voltage coil are exhausted with iron yoke
Edge 10 is fixedly connected, and the side core insulation 10 is fixedly connected with high pressure upper clamping piece 6, and the high pressure upper clamping piece 6 is led with high pressure
Wire clamp 8 is fixedly connected, and the other side core insulation 10 is fixedly connected with low pressure upper clamping piece 7, the low pressure upper clamping piece 7 and low pressure
Conductor grip 9 is fixedly connected, and the high pressure upper clamping piece 6 and the low pressure upper clamping piece 7 both pass through case lid 2 and be fixed on case lid 2, institute
It states 4 lower section two sides of high-voltage coil and low-voltage coil to be fixedly connected with lower clamping piece 11,11 both ends of lower clamping piece are fixed with feet cushion block 13
Connection, 13 lower section of feet cushion block are fixedly connected with feet insulation 14, and the feet insulation 14 is fixedly connected with feet 12.Institute
1 side of cabinet is stated equipped with access hole 15.1 three face of cabinet is equipped with numerous outer cooling fins 3.It is fixed in the cabinet 1
Transformer oil 24 is equipped in cabinet 1 described in interior cooling fin 18.The gasket 21 is fixed on outside transformer by fastening bolt 22
Inside shell 23.
Working principle: 12 impulse commutations are applied to oil well transformer by dedicated transformer, and the mode of connection is Y/Y/ △, secondary
Flanking phase of line difference is 30 °, outlet side electric current:
As can be seen from the above equation, dedicated transformer output current harmonics number is 12K ± 1,
Amplitude is inversely proportional with overtone order, and increases and reduce with overtone order.Make grid side 5
Secondary, 7 subharmonic currents greatly reduce.The transformer device structure feature is as follows:
(1) secondary side is three-phase Δ/identical three-phase windings of the line voltage of Y two, and every group of line voltage is 180V, and winding is using high
Induction reactance special designing, up to 10% or more；
(2) two windings have do not control or half control full-bridge rectification series connection output；
(3) two rectification modules 19 are arranged in transformer output wiring box, transport to frequency changer direct current bus end by two lines,
Radiator face is contacted with insulating oil in transformer body.
This transformer secondary uses two three-phase windings of Y and △, and two winding line voltages are equal.The former and deputy side of transformer around
Group leakage reactance is designed as 8% -10%.Conventional power transformer primary, vice-side winding leakage reactance are designed as 4% or so, and leakage reactance value is bigger,
Load voltage drop is bigger, and the high leakage reactance design of conventional power transformer does not allow.The high leakage reactance of utility model patent transformer
Mentality of designing be that the higher hamonic wave that frequency converter is generated due to rectification can be effectively reduced.Since the output of the transformer is rectification
Direct current afterwards, high leakage reactance are smaller on DC load voltage influence, control within 2%, meet the requirement of national standard 5%.Two windings
Three phase rectifier module 19 is arranged in transformer outlet terminal box, and rectification module 19 fills on a heat sink, and radiating surface is immersed in transformation
In device oil 24, it is ensured that the heat dissipation effect of rectification module 19, cooling fin are connected by fastening bolt with transformer case 23, cooling fin
It is sealed between transformer case 23 by gasket 21, the side outlet of transformer outlet side, exports as two line direct currents, be two windings
After rectified module 19 rectifies, direct current is connected in series (also can be in parallel), directly into the DC bus side of frequency converter.For being adapted to 380V
Frequency converter is connected in series mode after the rectification of two windings, and every phase winding voltage rating design value is 180V, parallel way 360V,
Schematic diagram is as shown in figure 5, transformer capacity is 20-30KVA, compared with conventional transformer capacity decline 30% or so.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (6)
1. a kind of pumping unit frequency conversion power transformer special, which is characterized in that including cabinet, fixed above the cabinet with case lid
Connection, the case lid upper end are equipped with high pressure inlet wire binding post, and the cabinet is fixedly arranged at the front end with transformer case, the transformer
It is fixed with low-pressure line-outgoing binding post in shell, gasket is fixed in the transformer case, is fixed on the inside of the gasket
Rectification module, the gasket outside are fixed with outlet terminal, are equipped with high-voltage coil and low-voltage coil, the high-voltage coil and low-voltage coil in the cabinet
Inside is equipped with iron core, and two sides are fixedly connected with core insulation above the high-voltage coil and low-voltage coil, the side core insulation and height
Pressure upper clamping piece is fixedly connected, and the high pressure upper clamping piece is fixedly connected with high-voltage conducting wires folder, the other side core insulation and low pressure
Upper clamping piece is fixedly connected, and the low pressure upper clamping piece is fixedly connected with primary cable folder, on the high pressure upper clamping piece and the low pressure
Folder both passes through case lid and is fixed on case lid, and two sides are fixedly connected with lower clamping piece below the high-voltage coil and low-voltage coil, under described
Folder both ends are fixedly connected with feet cushion block, are fixedly connected below the feet cushion block with feet insulation, the feet insulation
It is fixedly connected with feet.
2. a kind of pumping unit frequency conversion power transformer special according to claim 1, which is characterized in that the body side
Equipped with access hole.
3. a kind of pumping unit frequency conversion power transformer special according to claim 1, which is characterized in that three face of cabinet
It is equipped with numerous outer cooling fins.
4. a kind of pumping unit frequency conversion power transformer special according to claim 1, which is characterized in that solid in the cabinet
Surely there is interior cooling fin.
5. a kind of pumping unit frequency conversion power transformer special according to claim 1, which is characterized in that set in the cabinet
There is transformer oil.
6. a kind of pumping unit frequency conversion power transformer special according to claim 1, which is characterized in that the gasket is logical
Fixing bolt is crossed to be fixed on inside transformer case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821280809.4U CN208767137U (en) | 2018-08-09 | 2018-08-09 | A kind of pumping unit frequency conversion power transformer special |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821280809.4U CN208767137U (en) | 2018-08-09 | 2018-08-09 | A kind of pumping unit frequency conversion power transformer special |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208767137U true CN208767137U (en) | 2019-04-19 |
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ID=66130841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821280809.4U Active CN208767137U (en) | 2018-08-09 | 2018-08-09 | A kind of pumping unit frequency conversion power transformer special |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208767137U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284699A (en) * | 2021-03-17 | 2021-08-20 | 常州东芝变压器有限公司 | Transformer for supplying power to 5G communication base station arranged on transmission tower |
-
2018
- 2018-08-09 CN CN201821280809.4U patent/CN208767137U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284699A (en) * | 2021-03-17 | 2021-08-20 | 常州东芝变压器有限公司 | Transformer for supplying power to 5G communication base station arranged on transmission tower |
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