CN203481015U - High-power medium-frequency isolation transformer - Google Patents
High-power medium-frequency isolation transformer Download PDFInfo
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- CN203481015U CN203481015U CN201320570497.1U CN201320570497U CN203481015U CN 203481015 U CN203481015 U CN 203481015U CN 201320570497 U CN201320570497 U CN 201320570497U CN 203481015 U CN203481015 U CN 203481015U
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Abstract
The utility model discloses a high-power medium-frequency isolation transformer. The high-power medium-frequency isolation transformer comprises a transformer unit at least, wherein the transformation ratio of the transformer unit is 1:1; the transformer unit comprises a primary winding, a secondary winding, a first vertical plate, a second vertical plate, a first insulating support, a second insulating support and annular magnetic cores; the primary winding is fixed between the two vertical plates; the secondary winding is fixed between the two insulating supports, and the secondary winding and the primary winding are arranged coaxially; the annular magnetic cores are fixed to the outer side of the primary winding; the primary winding and the secondary winding achieve magnetic coupling through the annular magnetic cores. The high-power medium-frequency isolation transformer is compact in overall structure, achieves modularized design and the adjustable transformation ratio, is flexible to adjust, and saves cost; by means of the coaxial structure of the primary winding and the secondary winding, and the annular magnetic cores on the secondary winding, leakage inductance is small, loss is small, and the magnetic cores do not need to be cooled independently. According to different power requirements, the number of the magnetic cores can be adjusted flexibly, saturation of the magnetic core is avoided, temperature rise is controlled, and power transfer requirements are met.
Description
Technical field
The utility model belongs to field transformer, more specifically, relates to a kind of high-power intermediate frequency isolating transformer.
Background technology
Isolating transformer refers to the transformer that input winding and output winding are isolated from each other on electric, and its principle is identical with common dry-type transformer, is also to utilize electromagnetic induction principle, makes secondary circuit floating sky over the ground, to guarantee Electrical Safety.
Intermediate-freuqncy signal refers to that frequency range is 300kHz～3MHz radio frequency electromagnetic signal, is used to AM radio station, induction heating, plasma device etc. more.Due to " skin effect " of radio frequency, the traditional transformer that the silicon steel sheet of take is magnetic core cannot be used in intermediate frequency range.
At present, the scheme that intermediate frequency transformer adopts mainly contains coaxial line transformer, air-core transformer, conventional iron ferrite core transformer.Coaxial line transformer is used in intermediate frequency power amplification circuit and plays impedance transformation effect, have certain voltage buffer action, but power capacity is not high, is generally no more than 1kW.During air-core transformer intermediate frequency power delivery, leakage inductance is larger, and efficiency of transmission is low, applies less.Conventional iron ferrite core transformer mainly contains two kinds of versions, a kind of is in pillar FERRITE CORE, to be wound around first and second side winding, another kind is in closed FERRITE CORE, to be wound around first and second winding, their shortcoming is that transformer leakage inductance is relatively large, efficiency of transmission is relatively low, particularly when high-power (tens kilowatts to up to a hundred kilowatts) transmit, loss is larger, and FERRITE CORE heating is serious, can not work long hours.And wire required when high power transmission is thicker, if will meet high-voltage isolating between winding, the insulating barrier of wire just requires thicker, and Transformer Winding is difficult to manufacture.Therefore, adopt traditional intermediate frequency transformer scheme to have the problem that is difficult to simultaneously take into account high power capacity, high-efficiency transfer and intermediate frequency high-voltage isolating.
Utility model content
Above defect or Improvement requirement for prior art, the utility model provides a kind of high-power intermediate frequency isolating transformer, its object is to propose a kind of no-load voltage ratio, power capacity flexible adjustment, can either high efficiency of transmission intermediate frequency power, possess again the transformer solution of high-voltage isolating function; Solve existing tradition and solved the problem that is difficult to simultaneously take into account high power capacity, high-efficiency transfer and intermediate frequency high-voltage isolating that traditional transformer scheme exists.
The utility model transmits a kind of feasible program is provided for the powerful isolation of intermediate frequency, also can optimize intermediate frequency impedance matching network structure and parameter simultaneously.The utility model provides a kind of high-power intermediate frequency isolating transformer, comprises that at least one no-load voltage ratio is the transformer unit of 1:1; Described transformer unit comprises winding, secondary winding, the first riser, the second riser, the first insulated support, the second insulated support and toroidal core one time; A described winding is fixedly connected with the second riser with the first riser that is positioned at described winding both sides; Described secondary winding is separately fixed between described the first riser and described the second riser by the first insulated support at secondary winding two ends and the second insulated support, and described secondary winding and a described winding coaxially arrange; Described toroidal core is fixed on described winding outside; A described winding and described secondary winding realize magnetic coupling by described toroidal core.
The utility model also provides a kind of high-power intermediate frequency isolating transformer, comprises the transformer unit that n no-load voltage ratio is 1:1, a windings in series in the transformer unit that n no-load voltage ratio is 1:1, and secondary winding parallel connection forms the transformer that a no-load voltage ratio is n:1 afterwards; Described transformer unit comprises winding, secondary winding, the first riser, the second riser, the first insulated support, the second insulated support and toroidal core one time; A described winding is fixedly connected with the second riser with the first riser that is positioned at described winding both sides; Described secondary winding is separately fixed between described the first riser and described the second riser by the first insulated support at secondary winding two ends and the second insulated support, and described secondary winding and a described winding coaxially arrange; Described toroidal core is fixed on described winding outside; A described winding and described secondary winding realize magnetic coupling by described toroidal core; N is greater than 1 positive integer.
The utility model also provides a kind of high-power intermediate frequency isolating transformer, comprises the transformer unit that n*m no-load voltage ratio is 1:1, and at primary side, n*m winding is divided into n group, and every group m in parallel, then the series connection of n group; At secondary side, n*m winding is divided into m group, and every group n in parallel, then the series connection of m group; Form a transformer unit that no-load voltage ratio is n:m; Described transformer unit comprises winding, secondary winding, the first riser, the second riser, the first insulated support, the second insulated support and toroidal core one time; A described winding is fixedly connected with the second riser with the first riser that is positioned at described winding both sides; Described secondary winding is separately fixed on described the first riser and described the second riser by being positioned at the first insulated support and second insulated support at secondary winding two ends, and described secondary winding and a described winding coaxially arrange; Described toroidal core is fixed on described winding outside; A described winding and described secondary winding realize magnetic coupling by described toroidal core; N, m are the positive integer that is greater than 1, and n and m are unequal.
Still more preferably, between a described winding and described toroidal core, fill certain thickness megohmite insulant, guarantee that toroidal core is coaxial with a described winding.
Still more preferably, a described winding adopts metal tube, and described secondary winding adopts metal tube or high voltage insulation cable.
Still more preferably, empty metal tube in described secondary winding adopts, and logical cooling water heat radiation in metal tube.
Still more preferably, described toroidal core adopts annular ferrite core, is formed by stacking, and is socketed on a described winding by a plurality of circular ferrites.
The compact overall structure of the high-power intermediate frequency isolating transformer that the utility model provides, modularized design, adjusts flexible, cost-saving; The coaxial configuration of first and second winding, the ring core structure outside secondary winding, leakage inductance is little, and heating is few, needn't, separately for magnetic core provides cooling, can meet large power high efficiency transmission requirement.For different power condition, can adjust flexibly magnetic core number, avoid magnetic core saturated, control temperature rise, high-power to realize, efficient power delivery.Adopt RF isolation material, improved insulation property, can realize the electrical isolation under high voltage condition.
Accompanying drawing explanation
The structure cutaway view of 1:1 transformer unit in the high-power intermediate frequency isolating transformer that Fig. 1 provides for the utility model embodiment;
The core structure schematic diagram of transformer unit in the high-power intermediate frequency isolating transformer that Fig. 2 provides for the utility model embodiment;
Fig. 3 for the no-load voltage ratio that the utility model embodiment provides be 3:1(n:1) transformer electrical schematics;
The transformer device structure outline drawing that the no-load voltage ratio that Fig. 4 provides for the utility model embodiment is 3:1;
Fig. 5 for the utility model embodiment provide a no-load voltage ratio be 3:2(n:m) transformer electrical schematics.
In institute's drawings attached, identical Reference numeral is used for representing identical element or structure, wherein: 1 for secondary winding, 2 be the first riser, 3 be winding, 4 be the first insulated support, 5 for set bolt, 6 be the second riser, 7 for toroidal core, 8 be that the second insulated support, 9 connects, 13 is that pipe joint, 14 is base and 17 outlet pipes for being connected and fixed card, 15 for being connected in series part, 16 for four-way for oral siphon, 12 for the Ban,10Wei branch water cooling tube that is connected in parallel, 11.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.In addition,, in each execution mode of described the utility model, involved technical characterictic just can not combine mutually as long as do not form each other conflict.
The high-power intermediate frequency isolating transformer that the utility model relates at least comprises the transformer unit that a no-load voltage ratio is 1:1, as shown in Figure 1.Transformer unit comprises winding 3, secondary winding 1, the first riser 2, the second riser 6, the first insulated support 4, the second insulated support 8 and toroidal core 7 one time; One time winding 3 is fixedly connected with the second riser 6 with the first riser 2 that is positioned at winding 3 both sides; Secondary winding 1 is separately fixed on the first riser 2 and described the second riser 6 by being positioned at the first insulated support 4 and second insulated support 8 at secondary winding 1 two ends, and secondary winding 1 and a winding 3 coaxially arrange; Toroidal core 7 is fixed on winding 3 outsides one time; Winding 3 and secondary winding 1 realize magnetic coupling by toroidal core 7.
In transformer unit, secondary winding is a winding inside, and toroidal core is enclosed within on a winding outer wall, thereby realizes the magnetic coupling of first and second winding.Structure special character of the present utility model is: secondary winding is along axis through a winding, and first and second winding is realized magnetic coupling by exterior annular magnetic core, forms thus the transformer unit that no-load voltage ratio is 1:1.
The structure of the high-power intermediate frequency isolating transformer of the utility model unit mainly comprises: winding, secondary winding, annular ferrite core, riser, insulated support.In order to reduce the leakage inductance of transformer, the transformer unit that the utility model relates to adopts first and second winding scheme of coaxial configuration, one time winding adopts metal tube (conventionally to adopt copper pipe, but be not limited only to copper pipe), secondary winding adopts metal tube (conventionally adopt copper pipe, but be not limited only to copper pipe) or high voltage insulation cable.
In embodiments of the present invention, insulated support integral body is cylindrical structure, and one time winding is fixed by insulated support outer wall, and secondary winding is fixed by insulated support endoporus.One end of insulated support is umbrella skirt construction, increases creepage distance, improves dielectric strength.The one side of riser has ladder location hole, and one time winding can be fixed between the shoulder hole of two risers.The another side of riser has screwed hole, for fixed insulation, props up chapelet, and then realizes the coaxial of first and second winding.Riser and insulated support all adopt RF isolation material, make it be applicable to intermediate frequency, hyperbaric environment.
Toroidal core is fixed on winding outside one time, and whole magnetic core is by stacked the forming of a plurality of little annular ferrite cores.According to different power request transmissions, increase or reduce the magnetic core number on transformer unit, thus the work of adjustment magnetic flux size, while guaranteeing transformer operation, the temperature rise of magnetic core is within zone of reasonableness, as shown in Figure 2.
On the basis of the transformer unit of 1:1, according to different no-load voltage ratio demands, the mode of taking respectively series, parallel or connection in series-parallel to mix first and second winding of a plurality of transformer units couples together to realize required no-load voltage ratio.
The high-power intermediate frequency isolating transformer of the utility model can be realized n:1 no-load voltage ratio.In the utility model embodiment, high-power intermediate frequency isolating transformer comprises the transformer unit that n no-load voltage ratio is 1:1, a windings in series in the transformer unit that n no-load voltage ratio is 1:1, and secondary winding parallel connection forms the transformer that a no-load voltage ratio is n:1 afterwards; Transformer unit comprises winding 3, secondary winding 1, the first riser 2, the second riser 6, the first insulated support 4, the second insulated support 8 and toroidal core 7 one time; One time winding 3 is fixedly connected with the second riser 6 with the first riser 2 that is positioned at described winding 3 both sides; Secondary winding 1 is separately fixed on the first riser 2 and described the second riser 6 by being positioned at the first insulated support 4 and second insulated support 8 at secondary winding 1 two ends, and secondary winding 1 and a winding 3 coaxially arrange; Described toroidal core 7 is fixed on winding 3 outsides one time; Winding 3 and described secondary winding 1 realize magnetic coupling by toroidal core 7; N is greater than 1 positive integer.
For convenient narration, the high-power intermediate frequency isolating transformer of take 3:1 no-load voltage ratio at this is example, and as shown in Figure 3, its transformer unit by three 1:1 forms in electrical connection, and each winding intercoupling represents a transformer unit.A winding of three transformer units is connected successively, and secondary winding is simultaneously in parallel, can realize the no-load voltage ratio of 3:1.By parity of reasoning, a windings in series of n group transformer unit, and secondary winding is in parallel, can realize the no-load voltage ratio of n:1.
As shown in Figure 4, the primary structure of the high-power intermediate frequency isolating transformer of 3:1 no-load voltage ratio comprises winding 3, secondary winding 1, toroidal core 7, riser 2,6, insulated support 4,8, a base 16, is connected and fixed card 14, is connected in series part 15, plate 9 is connected in parallel.Wherein, first and second winding, toroidal core, riser and insulating supporting minor structure are as hereinbefore.Be connected and fixed card as the lead terminal of a winding, by two scale coppers that are clipped on a winding outer wall, formed.Being connected in series part can be by a windings in series, and its structure is one section of copper pipe, and its two ends folder is flat, and at two ends, stays two apertures, for being connected in series part and being connected and fixed the fixing of card.The plate that is connected in parallel is in parallel by secondary winding, and its structure is three sides processing semi-circular recesses at copper coin, for fixing secondary winding.Base is for fixed board, as the integrally-built bottom support of transformer.
The mechanical structure of the high-power intermediate frequency isolating transformer of 3:1 no-load voltage ratio as shown in Figure 4, the transformer unit of three 1:1 is fixed on base 16, what be fixed on winding 3 outsides is connected and fixed card 14 as the lead terminal of a winding 3, and two are connected in series part 15 three windings 3 of primary side are connected successively.Be connected in parallel plate 9 as the lead terminal of secondary winding 1, and two blocks of plates 9 that are connected in parallel are by three secondary winding 1 parallel connections of secondary side.Meanwhile, be connected and fixed card 14, the plate 9 that is connected in parallel also can be used as external lead terminal, transformer can be linked in power equipment.
The high-power intermediate frequency isolating transformer of the utility model can be realized n:m no-load voltage ratio.In the utility model embodiment, high-power intermediate frequency isolating transformer comprises the transformer unit that n*m no-load voltage ratio is 1:1, and at primary side, n*m winding is divided into n group, and every group m in parallel, then the series connection of n group; At secondary side, n*m winding is divided into m group, and every group n in parallel, then the series connection of m group; Form a transformer unit that no-load voltage ratio is n:m; Transformer unit comprises winding 3, secondary winding 1, the first riser 2, the second riser 6, the first insulated support 4, the second insulated support 8, set bolt 5 and toroidal core 7 one time; One time winding 3 is fixedly connected with the second riser 6 with the first riser 2 that is positioned at winding 3 both sides; Secondary winding 1 is separately fixed on the first riser 2 and the second riser 6 by being positioned at the first insulated support 4 and second insulated support 8 at secondary winding 1 two ends, and secondary winding 1 and a winding 3 coaxially arrange; Toroidal core 7 is fixed on winding 3 outsides one time; Winding 3 and secondary winding 1 realize magnetic coupling by toroidal core 7; N, m are the positive integer that is greater than 1, and n and m are unequal.
For convenient narration, the high-power intermediate frequency isolating transformer of take 3:2 no-load voltage ratio at this is example.As shown in Figure 5, its transformer unit by six 1:1 forms, and every two windings that intercouple represent a transformer unit.Primary side, six windings are divided into three groups, every group of two parallel connections, then three groups of series connection.Secondary side, six windings are divided into two groups, every group of three parallel connections, then two groups of parallel connections.First and second side winding is through toroidal core coupling, and realizing no-load voltage ratio is the high-power intermediate frequency isolating transformer of 3:2.Thus, calculating under the condition of no-load voltage ratio, the transformer unit of n*m 1:1 can be realized the high-power intermediate frequency isolating transformer of n:m.
In the utility model embodiment, first and second winding spacing of transformer unit can require to change according to different dielectric strengths.By changing the inside/outside diameter size of first and second winding of transformer unit, change the spacing between first and second winding, can adapt to different dielectric strength requirements.
Preferably, one time winding adopts copper pipe, introduces the dry internal surface radiating of high pressure draught, makes it be applicable to large-power occasions.Secondary winding adopts copper pipe, introduces cooling water circulation and plays thermolysis, makes it be applicable to large-power occasions.Secondary winding copper pipe outer wall sintering has the insulating barrier of polyimides and glass tape, increases substantially dielectric strength.Riser and insulated support adopt polytetrafluoroethylmaterial material.Toroidal core adopts a plurality of annular ferrite cores to be formed by stacking, and integral ring-shaped magnetic core is enclosed within on a winding, concentric with a winding.When the secondary winding of transformer unit adopts metal tube, can be at the sintering insulated material of its outer surface, with a winding inwall insulation, insulating material is polyimides and glass tape composite bed.The toroidal core of transformer unit by the fixed card on a winding by magnetic core from two side compressions.The secondary winding of transformer unit can adopt the copper pipe of interior sky, logical cooling water heat radiation in copper pipe.
The high-power intermediate frequency isolating transformer of the utility model new structure, has solved the little problem of coaxial line transformer efficiency capacity on the one hand, has solved on the other hand air-core transformer, large, the inefficient problem of conventional transformer structure leakage reactance.
The advantage of the high-power intermediate frequency isolating transformer of the utility model new structure is compact overall structure, and modularized design is adjusted flexible, cost-saving.The coaxial configuration of first and second winding, the annular ferrite core structure outside secondary winding, leakage inductance is little, and heating is few, needn't be separately for magnetic core provides cooling.For different power requirements, can adjust flexibly magnetic core number, to avoid, magnetic core is saturated, control temperature rise, meets power delivery requirement.
Now lift the transformer specific embodiment that a no-load voltage ratio is 3:1 the utility model is described, this embodiment is that 1:1 transformer unit is formed by connecting by three no-load voltage ratios.Now referring to Fig. 1, one time winding 3 is fixing by the riser 2,6 of both sides, and secondary winding 1 is fixed on riser by the insulated support 4,8 at two ends, coaxial with a winding, and axiality is ± 0.05mm, to reduce transformer loss.Toroidal core 7 is fixed on winding 3 outsides one time.Between winding and magnetic core, can fill certain thickness megohmite insulant, guarantee that toroidal core is coaxial with a winding, reduction transformer loss.
Now, referring to Fig. 2, the toroidal core 7 on transformer adopts annular ferrite core to be layering and forms, for different power delivery requirements, can add and subtract the number of magnetic core, avoids transformer work Flux saturation, adjusts flexibly, cost-saving.
Now, referring to Fig. 3, the transformer that no-load voltage ratio is 3:1 is comprised of three transformer units.One time winding 3 selects thick oxygen-free copper pipe, secondary winding 1 to select thin oxygen-free copper pipe.A winding 3 of 3 transformer units is connected by being connected in series part 15, secondary winding 1 and plate 9 short circuits that are connected in parallel, and the no-load voltage ratio that makes whole transformer is 3:1.On the first riser 2 and the second riser 6, respectively have three circular holes, three windings 3 are fixed between the circular hole of riser.Secondary winding 1 is through a winding 3, fixing by insulated support 4,8, guarantees the be less than ± 0.05mm of axiality of winding 3 and secondary winding 1, has reduced transformer loss.Three windings 3 are by being connected in series part 15 series connection, and three secondary winding 1 are by short-circuit board in parallel 9 parallel connections on both sides.Toroidal core 7 is enclosed within on a winding 3, by two ends, is connected and fixed card 14 fixed positions.Be connected in series part 15 and be bolted on and be connected and fixed on card 14, realize the series connection of a winding 3 of transformer.
Secondary winding 1 outer wall sintering has polyimides and glass tape insulating barrier, has improved dielectric strength, has guaranteed the insulation of secondary winding 1 and a winding 3.In secondary winding 1, pass into deionization cooling water, play the effect of heat radiation.Deionized water is flowed into by oral siphon 11, is divided into three enters branch's water cooling tube 10 by four-way 12.Pipe joint 13 is connected for secondary winding 1 and branch water cooling tube 10.Deionization flows through via secondary winding 1 inside, from opposite side outlet pipe 17, flows out.Riser 2,6, insulated support 4,8 and post insulator all adopt the material of polytetrafluoroethylene, have greatly improved dielectric strength, make the present embodiment be applicable to high pressure insulation request.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (7)
1. a high-power intermediate frequency isolating transformer, is characterized in that, comprises that at least one no-load voltage ratio is the transformer unit of 1:1; Described transformer unit comprises a winding (3), secondary winding (1), the first riser (2), the second riser (6), the first insulated support (4), the second insulated support (8) and toroidal core (7); A described winding (3) is fixedly connected with the second riser (6) with the first riser (2) that is positioned at a described winding (3) both sides; Described secondary winding (1) is separately fixed between described the first riser (2) and described the second riser (6) by being positioned at the first insulated support (4) and second insulated support (8) at secondary winding (1) two ends, and described secondary winding (1) coaxially arranges with a described winding (3); Described toroidal core (7) is fixed on a described winding (3) outside; A described winding (3) and described secondary winding (1) realize magnetic coupling by described toroidal core (7).
2. a high-power intermediate frequency isolating transformer, is characterized in that, comprises the transformer unit that n no-load voltage ratio is 1:1, a windings in series in the transformer unit that n no-load voltage ratio is 1:1, and secondary winding parallel connection forms the transformer that a no-load voltage ratio is n:1 afterwards;
Described transformer unit comprises a winding (3), secondary winding (1), the first riser (2), the second riser (6), the first insulated support (4), the second insulated support (8) and toroidal core (7); A described winding (3) is fixedly connected with the second riser (6) with the first riser (2) that is positioned at a described winding (3) both sides; Described secondary winding (1) is separately fixed on described the first riser (2) and described the second riser (6) by being positioned at the first insulated support (4) and second insulated support (8) at secondary winding (1) two ends, and described secondary winding (1) coaxially arranges with a described winding (3); Described toroidal core (7) is fixed on a described winding (3) outside; A described winding (3) and described secondary winding (1) realize magnetic coupling by described toroidal core (7); N is greater than 1 positive integer.
3. a high-power intermediate frequency isolating transformer, is characterized in that, comprises the transformer unit that n*m no-load voltage ratio is 1:1, and at primary side, n*m winding is divided into n group, and every group m in parallel, then the series connection of n group; At secondary side, n*m winding is divided into m group, and every group n in parallel, then the series connection of m group; Form a transformer unit that no-load voltage ratio is n:m;
Described transformer unit comprises a winding (3), secondary winding (1), the first riser (2), the second riser (6), the first insulated support (4), the second insulated support (8) and toroidal core (7); A described winding (3) is fixedly connected with the second riser (6) with the first riser (2) that is positioned at a described winding (3) both sides; Described secondary winding (1) is separately fixed on described the first riser (2) and described the second riser (6) by being positioned at the first insulated support (4) and second insulated support (8) at secondary winding (1) two ends, and described secondary winding (1) coaxially arranges with a described winding (3); Described toroidal core (7) is fixed on a described winding (3) outside; A described winding (3) and described secondary winding (1) realize magnetic coupling by described toroidal core (7); N, m are the positive integer that is greater than 1, and n and m are unequal.
4. the high-power intermediate frequency isolating transformer as described in claim 1-3 any one, it is characterized in that, between a described winding (1) and described toroidal core (7), fill certain thickness megohmite insulant, guarantee that toroidal core (7) is coaxial with a described winding (1).
5. the high-power intermediate frequency isolating transformer as described in claim 1-3 any one, is characterized in that, a described winding adopts metal tube, and described secondary winding adopts metal tube or high voltage insulation cable.
6. high-power intermediate frequency isolating transformer as claimed in claim 5, is characterized in that, empty metal tube in described secondary winding adopts, and logical cooling water heat radiation in metal tube.
7. the high-power intermediate frequency isolating transformer as described in claim 1-3 any one, is characterized in that, described toroidal core (7) adopts annular ferrite core, is formed by stacking, and is socketed on a described winding by a plurality of circular ferrites.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570497.1U CN203481015U (en) | 2013-09-13 | 2013-09-13 | High-power medium-frequency isolation transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320570497.1U CN203481015U (en) | 2013-09-13 | 2013-09-13 | High-power medium-frequency isolation transformer |
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| CN203481015U true CN203481015U (en) | 2014-03-12 |
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| CN201320570497.1U Withdrawn - After Issue CN203481015U (en) | 2013-09-13 | 2013-09-13 | High-power medium-frequency isolation transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700470A (en) * | 2013-09-13 | 2014-04-02 | 华中科技大学 | High-power and medium-frequency isolation transformer |
| CN108463861A (en) * | 2015-12-22 | 2018-08-28 | 超级电力研究所 | Power transformer for remote high-voltage equipment |
| CN110391058A (en) * | 2018-04-20 | 2019-10-29 | 华中科技大学 | A kind of fictitious load of milliohm grade and design method for high power system |
-
2013
- 2013-09-13 CN CN201320570497.1U patent/CN203481015U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700470A (en) * | 2013-09-13 | 2014-04-02 | 华中科技大学 | High-power and medium-frequency isolation transformer |
| CN103700470B (en) * | 2013-09-13 | 2015-12-23 | 华中科技大学 | A kind of high-power medium-frequency isolation transformer |
| CN108463861A (en) * | 2015-12-22 | 2018-08-28 | 超级电力研究所 | Power transformer for remote high-voltage equipment |
| CN110391058A (en) * | 2018-04-20 | 2019-10-29 | 华中科技大学 | A kind of fictitious load of milliohm grade and design method for high power system |
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