CN203826188U - Filtering transformer for transforming three phases into single phase - Google Patents
Filtering transformer for transforming three phases into single phase Download PDFInfo
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- CN203826188U CN203826188U CN201420122377.XU CN201420122377U CN203826188U CN 203826188 U CN203826188 U CN 203826188U CN 201420122377 U CN201420122377 U CN 201420122377U CN 203826188 U CN203826188 U CN 203826188U
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- transformer
- yoke
- reactor
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- 238000001914 filtration Methods 0.000 title abstract 5
- 230000001131 transforming effect Effects 0.000 title abstract 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910052742 iron Inorganic materials 0.000 claims abstract description 16
- 230000009466 transformation Effects 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000000844 transformation Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910000976 Electrical steel Inorganic materials 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Coils Of Transformers For General Uses (AREA)
Abstract
The utility model relates to a filtering transformer for transforming three phases into a single phase. The filtering transformer for transforming the three phases into the single phase, provided by the utility model, has the advantages that the degree of unbalance of a three-phase load can be reduced, and the function of filtering can be realized. The filtering transformer for transforming the three phases into the single phase comprises a transformer upper iron yoke, a transformer lower iron yoke, three transformer iron core columns, an electric reactor upper iron yoke, an electric reactor lower iron yoke and three electric reactor iron core columns, wherein two electric reactor iron core columns, which are arranged at the two sides, of the three electric reactor iron core columns are provided with air gaps, and the electric reactor iron core column arranged in the middle is not provided with air gaps.
Description
Technical field
The utility model relates to a kind of power equipment, specifically, relates to the single-phase filter transformer of a kind of three phase transformation.
Background technology
Along with the development of power electronic technology, power electronic equipment capacity increases, and single-phase transformer capacity also increases thereupon.When power supply is three phase mains, the use of single-phase transformer can make the load on three phase mains become uneven.If single-phase transformer confession be rectified load, or the larger load of harmonic content, also can be by harmonic propagation to electrical network.
During three phase supply, each load capacity that can carry is mutually generally identical.If use common three to become single phase transformers (such as Scott, Wood bridge etc.), although the degree of unbalance of three-phase current is little, its complex structure, cost are high; And do not possess filter function.And if use conventional single-phase transformer, transformer input side can only be connected in the two-phase in three phase mains, can make the load capacity of this two-phase increase, and the degree of unbalance of three-phase current is larger, the Voltage unbalance degree of electric power system end also can be larger, and power supply quality is reduced; When wherein the load of two-phase reaches rated capacity, although third phase does not also reach rated capacity, the equipment of other need access three phase mains can not access power supply again, because can make like this two-phase overload wherein.
Utility model content
The purpose of this utility model is to provide the single-phase filter transformer of a kind of three phase transformation, can reduce on the one hand the degree of unbalance of threephase load, also can realize filter function on the other hand.
The purpose of this utility model is achieved in that
The single-phase filter transformer of three phase transformations, comprising: an iron yoke on transformer, a transformer lower yoke, three legs; A reactor upper yoke, a reactor lower yoke, three iron core of electric reactor posts; In described three iron core of electric reactor posts, the two iron core of electric reactor posts that are arranged on both sides are provided with air gap, and the iron core of electric reactor post in the middle of being arranged on is not established air gap.
Wherein, on described leg, air gap can be provided with, also air gap can be do not established; As air gap is set, in the middle of can being located at, described gap position also can be arranged on the junction of core limb and iron yoke; The material of core limb can be orientation silicon steel, non-orientation silicon steel, amorphous core, can be also the dustcores such as ferrite.
Further, the single-phase filter transformer of the utility model three phase transformation also comprises two loading coils and a magnet exciting coil; Described each loading coil comprises an inner coil and an outer coil, and described inner coil is on described leg, and described outer coil is around described inner coil and being provided with on the iron core of electric reactor post of air gap; Described magnet exciting coil is around being positioned on middle leg.Due to the outer coil of reactor common transformer, without reactor winding is set separately, can save reactor winding material, reduced machine volume simultaneously.
Wherein, the heating current of described loading coil is pressed output current design; The heating current of described magnet exciting coil is pressed no-load current design; Magnet exciting coil is separately on a core limb of transformer, and this phase coil only flows through elementary exciting current (medium and small transformer magnetizing current is about 5% left and right of load current), can design by exciting current, saves this phase coil material.
Described two loading coils and a magnet exciting coil are set up in parallel between described iron yoke on transformer, transformer lower yoke and reactor upper yoke, reactor lower yoke.
The outer coil of described loading coil and described magnet exciting coil are done delta connection, and the described inner coil of single-phase outlet side is made V-connection, and a pair of Same Name of Ends of two inner coils is bound up, and from another, Same Name of Ends is drawn to lead-out terminal.Outer coil Left-wing Federation when knot of described loading coil, the outlet row sectional area of A phase is other two-phase 2 times; During the right connection of described outer coil, the outlet row sectional area of C phase is other two-phase 2 times.
Further, between described inner coil and outer coil, can be provided with screen, also provided with shielding layer not.Be provided with screen, can further reduce to be capacitively coupled to the harmonic wave of outlet side through between input, outlet side coil.If screen is set, described screen is the metal forming of layer of copper or aluminium.
The utility model is owing to having adopted technique scheme, compared with prior art there is following beneficial effect: when common single-phase transformer is connected on three phase mains, three-phase current unbalance degree is about 50%, and use the three-phase current unbalance degree of the single-phase filter transformer of the utility model three phase transformation to be reduced to 25%, thereby the capacity of the load that expansion power supply (power transmission line) carries, improve the quality of voltage of electric power system end, access after the transformer of equal capacity, also accessible a certain amount of threephase load, the degree of unbalance of threephase load reduces, also can make the Voltage unbalance degree of electric power system end reduce simultaneously, thereby can improve power supply quality, by realizing filter function at transformer input side built-in reactor, effectively reduce the harmonic content of mains side on the other hand, the utility model is simple in structure, economizes on material, and volume is little, lightweight, without configuring separately filter reactor, thereby dwindles installing space again.
Accompanying drawing explanation
By following embodiment of the present utility model description taken together with the accompanying drawings, other advantage of the present utility model and feature are shown, this embodiment provides with the form of example, but is not limited to this, wherein:
Fig. 1 is the structural representation of the preferred embodiment of the single-phase filter transformer of the utility model three phase transformation;
Fig. 2 is left side view direction structure schematic diagram embodiment illustrated in fig. 1;
Fig. 3 is the structural representation of middle reactor iron yoke embodiment illustrated in fig. 1, core limb;
Fig. 4 is the structural representation of middle transformer yoke embodiment illustrated in fig. 1, core limb;
Fig. 5 is the winding schematic diagram of the loading coil of the single-phase filter transformer of the utility model three phase transformation;
Fig. 6 is the winding schematic diagram of the magnet exciting coil of the single-phase filter transformer of the utility model three phase transformation;
Fig. 7 is the schematic diagram in outer coil Left-wing Federation when knot of the loading coil of the single-phase filter transformer of the utility model three phase transformation;
The schematic diagram of the outer coil of the loading coil of the single-phase filter transformer of Fig. 8 the utility model three phase transformation during right connection;
Fig. 9 is the structural representation of another preferred embodiment of the single-phase filter transformer of the utility model three phase transformation;
Figure 10 is left side view direction structure schematic diagram embodiment illustrated in fig. 9;
Figure 11 is the structural representation of middle reactor iron yoke embodiment illustrated in fig. 9, core limb;
Figure 12 is the structural representation of middle transformer yoke embodiment illustrated in fig. 9, core limb.
Embodiment
A preferred embodiment of the single-phase filter transformer of the utility model three phase transformation as shown in the figure, comprises an iron yoke on transformer 11, transformer lower yoke 13, three legs 12; Reactor upper yoke 21, reactor lower yoke 23, three iron core of electric reactor posts 22; Shown in Fig. 3, two iron core of electric reactor posts 22 that are arranged on both sides are provided with air gap 220, and be arranged on middle iron core of electric reactor post 22, do not establish air gap.In the present embodiment, the single-phase filter transformer of three phase transformations also comprises two loading coils 14 and a magnet exciting coil 15.Shown in Fig. 5, Fig. 6, loading coil 14 comprises inner coil 141 and outer coil 142, two inner coils 141 are respectively on two legs 12, and two outer coils 142 are provided with on the iron core of electric reactor post 22 of air gap 220 around two inner coils 141 and two respectively; Magnet exciting coil 15 is around being positioned on the 3rd middle leg 12.Two loading coils 14 and magnet exciting coil 15 are set up in parallel between iron yoke on transformer 11, transformer lower yoke 13 and reactor upper yoke 21, reactor lower yoke 23.
Wherein, the heating current of loading coil 14 is pressed output current design; The heating current of magnet exciting coil 15 is pressed no-load current design.
Outer coil 141 and the magnet exciting coil 24 of loading coil 14 are done delta connection, and the inner coil 142 of single-phase outlet side is made V-connection, and a pair of Same Name of Ends of two inner coils 142 is bound up, and from another, Same Name of Ends is drawn to lead-out terminal.Outer coil 141 Left-wing Federations' when knot (as shown in Figure 7) of loading coil 14, the outlet row sectional area of A phase is other two-phase 2 times; During the right connection of outer coil 141 (as shown in Figure 8), the outlet row sectional area of C phase is other two-phase 2 times.
The material of above-mentioned core limb can be orientation silicon steel, non-orientation silicon steel, amorphous core, can be also the dustcores such as ferrite.
As preferred embodiment of the present utility model, between inner coil 142 and outer coil 141, can be provided with screen (not shown), screen is the metal forming of layer of copper or aluminium, can further reduce to be capacitively coupled to the harmonic wave of outlet side through between input, outlet side coil.
Another preferred embodiment of the single-phase filter transformer of the utility model three phase transformation as shown in Fig. 9-12, the difference of the present embodiment and a upper embodiment is: in the present embodiment, leg 12 is provided with air gap 120, and in last embodiment, on leg 12, does not establish air gap.Gap position can be located at the centre of leg, also can be arranged on the junction of core limb and iron yoke.In the present embodiment, air gap 120 is separately positioned on the junction of core limb 12 and iron yoke on transformer 11 and transformer lower yoke 13.
Claims (10)
1. the single-phase filter transformer of three phase transformations, is characterized in that, comprising:
An iron yoke on transformer, a transformer lower yoke, three legs;
A reactor upper yoke, a reactor lower yoke, three iron core of electric reactor posts;
In described three iron core of electric reactor posts, the two iron core of electric reactor posts that are arranged on both sides are provided with air gap, and the iron core of electric reactor post in the middle of being arranged on is not established air gap.
2. the single-phase filter transformer of three phase transformation as claimed in claim 1, is characterized in that: on described leg, have air gap.
3. the single-phase filter transformer of three phase transformation as claimed in claim 2, is characterized in that: on described leg, set air gap is positioned at the centre of core limb or the junction of core limb and iron yoke.
4. the single-phase filter transformer of three phase transformation as claimed in claim 1, is characterized in that: also comprise two loading coils and a magnet exciting coil; Described each loading coil comprises an inner coil and an outer coil, and described inner coil is on described leg, and described outer coil is around described inner coil and being provided with on the iron core of electric reactor post of air gap; Described magnet exciting coil is around being positioned on middle leg.
5. the single-phase filter transformer of three phase transformation as claimed in claim 4, is characterized in that: the heating current of described loading coil designs by output current; The heating current of described magnet exciting coil is pressed no-load current design.
6. the single-phase filter transformer of three phase transformation as claimed in claim 4, is characterized in that: described two loading coils and a magnet exciting coil are set up in parallel between described iron yoke on transformer, transformer lower yoke and reactor upper yoke, reactor lower yoke.
7. the single-phase filter transformer of three phase transformation as claimed in claim 4, it is characterized in that: the outer coil of described loading coil and described magnet exciting coil are done delta connection, the a pair of Same Name of Ends of the described inner coil of single-phase outlet side is bound up, and from another, Same Name of Ends is drawn to lead-out terminal.
8. the single-phase filter transformer of three phase transformation as claimed in claim 7, is characterized in that: during the outer coil Left-wing Federation knot of described loading coil, the outlet row sectional area of A phase is other two-phase 2 times; During the right connection of described outer coil, the outlet row sectional area of C phase is other two-phase 2 times.
9. the single-phase filter transformer of three phase transformation as claimed in claim 4, is characterized in that: between described inner coil and outer coil, be provided with screen.
10. the single-phase filter transformer of three phase transformation as claimed in claim 9, is characterized in that: described screen is the metal forming of layer of copper or aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420122377.XU CN203826188U (en) | 2014-03-18 | 2014-03-18 | Filtering transformer for transforming three phases into single phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420122377.XU CN203826188U (en) | 2014-03-18 | 2014-03-18 | Filtering transformer for transforming three phases into single phase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826188U true CN203826188U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420122377.XU Expired - Lifetime CN203826188U (en) | 2014-03-18 | 2014-03-18 | Filtering transformer for transforming three phases into single phase |
Country Status (1)
| Country | Link |
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| CN (1) | CN203826188U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824688A (en) * | 2014-03-18 | 2014-05-28 | 上海意兰可电力电子设备有限公司 | Filter transformer with three phases changed into single phase |
-
2014
- 2014-03-18 CN CN201420122377.XU patent/CN203826188U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824688A (en) * | 2014-03-18 | 2014-05-28 | 上海意兰可电力电子设备有限公司 | Filter transformer with three phases changed into single phase |
| CN103824688B (en) * | 2014-03-18 | 2017-02-15 | 上海意兰可电力电子设备有限公司 | Filter transformer with three phases changed into single phase |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |