CN2318700Y - Interlink coupling high-voltage impact isolation transformer - Google Patents
Interlink coupling high-voltage impact isolation transformer Download PDFInfo
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- CN2318700Y CN2318700Y CN 97226880 CN97226880U CN2318700Y CN 2318700 Y CN2318700 Y CN 2318700Y CN 97226880 CN97226880 CN 97226880 CN 97226880 U CN97226880 U CN 97226880U CN 2318700 Y CN2318700 Y CN 2318700Y
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- former
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Abstract
The utility model relates to the technical field of an isolation transformer. A primary side winding uniformly winds on an annular iron core to form a primary side iron core coil; an auxiliary side winding is wound into a compact fascicular annular ring by a loose coupling to form an auxiliary side air-core coil. The two annular coils with approximate diameters respectively pass through the position of the center of circle of themselves to form an interlink-shaped appearance, an air medium gap between the two coils forms main insulation which is used as the main insulation of the isolation transformer, and the main insulation can effectively isolate and attenuate high frequency or pulse high voltages and high potential, so a frangible complex electronic monitoring device which can not bear impact by high voltage can be reliably protected.
Description
The utility model relates to a kind of isolating transformer technical field, and it is used to protect the electric power system on-Line Monitor Device.
High voltage isolation transformer is to be used for to electronics or electric testing instrument, when instrument system provides AC supply voltage, makes it one of the high potential avoiding being associated in the particular range or common equipment of high voltage injury.It can block from the former limit that is connected or secondary system conduction and the direct current that comes, industrial frequency AC, high-frequency ac, continuously or transient pulse high potential, high voltage to the issuable infringement of monitoring device; Or may produce the dangerous high potential of infringement, high-tension strength retrogression to the safe range that allows with interior and do not injure protected monitoring device.
Existing various high voltage isolation transformer all is to adopt solid insulating material as Main Insulation Structure of Electric basically.Because the dielectric constant of solid insulating material is bigger, the main insulation of this structure often has the sizable parasitic capacitance of numerical value, and its capacitive reactances value under high-frequency ac or transient pulse high voltage is lower; And equivalent frequency or voltage change ratio are high more, and equivalent capacitive reactance is just low more.Under high frequency, the main insulation of existing various isolating transformers will form low capacitive reactance conductive channel, and when high frequency or the high-tension intensity of arteries and veins surpass certain limit, it will lose the protective capability to protected object, and it is come to harm, and isolating transformer performs practically no function! Though they can play protective action to stable state high potential, the high voltage of direct current, low frequency or industrial frequency AC, this class voltage also tends to produce the transition transient process, thereby might produce high-intensity high-frequency and high-voltage component, causes protected equipment to come to harm.Can't well and effectively finish critical Quarantine Tasks: high frequency or the high voltage pulse that produces in the electric transient process carried out effective isolation, with protection be unable to undergo the electronics of the fragility that high voltage slightly impacts or electric testing instrument, instrument, monitoring system is not encroached on.
Weak point at above-mentioned existing technology existence; the utility model proposes a kind of a chain of coupling high voltage and impact isolating transformer; it adopts the main insulation of air dielectric gap as isolating transformer; can be effectively to high-frequency or pulse high-voltage, high potential is isolated or decay, protection is unable to undergo the sophisticated electronic monitoring equipment of the fragility that high voltage slightly impacts reliably.
The utility model reaches by following technical measures: this isolating transformer comprises that former and deputy sideline circle and the fixing skeleton of supporting thereof constitute supplementary insulation, former limit winding is wound on equably and constitutes former limit iron-core coil on the annular iron core, the secondary winding turns to a pencil annulus formation secondary air core coil closely with loose coupling, the position, the center of circle that above-mentioned two close making toroidal coils of diameter pass separately constitutes a chain of shape outward appearance, and the air dielectric gap between them constitutes main insulation.
Main insulation air gap minimum between the circle of former and deputy sideline is no less than 5 centimetres, and between the nearest each point of former and deputy sideline circle identical air gap distance is arranged; Transformer case adopts high-intensity nonmetal insulating sheet material to make.
Advantage of the present utility model and good effect thereof: adopt the air dielectric gap as the main insulation between the circle of former and deputy sideline, because the dielectric constant of air is very little, the parasitic capacitance numerical value that has under comparable size is also little.When product design allow that the isolation voltage value increases the time, main insulation air dielectric gap also increases thereupon, corresponding parasitic capacitance value also reduces.This insulation system; isolation and attenuation to high-frequency or pulse high-voltage high potential are very favourable; make its actual isolation effect that the very significant raising of essence be arranged, can protect reliably and be unable to undergo the sophisticated electronic monitoring equipment of the fragility of high voltage impact slightly.
The utility model is compared with all traditional isolating transformers, owing to adopt air main insulation so that parasitic capacitance cuts to bone, thereby obtained the effective buffer action under high frequency or pulse high-voltage, and has the above high dielectric strength of tens thousand of volts, in addition, it also has the repertoire that traditional isolating transformer can be finished, and this is the most basic requirement of transformer isolation high voltage of using electromagnetic induction principle.
The utility model is described further below in conjunction with embodiment and accompanying drawing thereof.
Fig. 1 is fixed on the structural representation of supporting on the skeleton for former and deputy sideline circle; Fig. 2 is that the position between annular former limit iron-core coil and the secondary hollow loop coil concerns schematic diagram; Fig. 3 is a former and deputy sideline circle electromagnetic coupled equivalent circuit diagram, and Fig. 4 is a former and deputy sideline circle power frequency equivalent circuit diagram; Fig. 5 is former secondary coil high frequency equivalent circuit diagram.
As shown in the figure, the support skeleton (4,5,6) of former and deputy sideline circle (2,3) itself is as supplementary insulation, and primary coil (2) uses annular core (1) as magnetic circuit, and former limit winding roughly is wound on the annular core equably.Secondary coil (3) passes the position, the center of circle of former limit its annular iron core of iron-core coil in the mode of loose coupling, turn to another pencil annulus closely, constitute a chain of shape profile, the diameter of two annulus is approximately close, pass position, the center of circle separately mutually, between them with the air dielectric gap as main insulation, because of the dielectric constant of air is very little, so the parasitic capacitance value between former and deputy sideline circle is also very little.The about 30PF of typical products measured value has good high frequency and pulse high-voltage isolation performance.Make the product crystalline substance that has above power frequency of tens thousand of volts and impulse withstand voltage level between the circle of former and deputy sideline by actual needs, about the about 30KV of industrial frequency withstand voltage value that typical products can bear.The withstand voltage level that requires is high more, and the size of product is big more, and the main insulation air gap can be from several centimetres to tens of centimetres.
Its insulation system of isolated transformer device that the application proposes is more special, and the degree of coupling between former and deputy limit is pine, and corresponding leakage inductance value is also bigger, utilize this characteristics, can suitably dispose CSET respectively on former and deputy limit, the two-way high-frenquency current blocking device of structure face is to strengthen isolation effect.The loose coupling structure of this isolating transformer as the power supply of measuring instrument instrument system, can not influence the normal transmission performance of industrial frequency AC electric energy fully, can fully be competent at the power supply task to various electronics or electric monitoring equipment; The power frequency through-put power is when multikilowatt is following, and its bigger leakage reactance is adjusted frequency to normal voltage and be there is no tangible influence.The secondary output voltage U
ScUsually with former limit input power-frequency voltage U
SrIdentical, also can have different voltage tap values simultaneously, or be that secondary is specified output voltage values by actual needs.
The support skeleton of former and deputy sideline circle is to utilize the insulating resin cast of high strength insulation board or epoxy resin to make.Former and deputy sideline circle itself is surperficial with the integrated poured shaping of this resinoid, resin-cast partly is as shell shape support, support that with insulation skeleton is combined into one, as the supplementary insulation structure between the circle of former and deputy sideline, its dielectric strength is also roughly the same, guarantees the rational technical-economic index of insulation system with this.
Prevent that for dustproof reaching foreign matter influences effective dielectric strength of main insulation air gap, this isolating transformer all should install the shell that the high strength insulation board is made additional usually, and this shell must not be made of metal material, in order to avoid increase parasitic capacitance and reduce dielectric strength.
Fig. 3, in 4,5, C
0Be the equivalent parasitic capacitances in air main insulation gap between the circle of former and deputy sideline, they are the of paramount importance parameters of this isolating transformer, have determined the actual isolation effect under high frequency or the pulse high-voltage.General total equivalent electric capacity is tens of picofarads, and the typical products measured value is about 30PF, and the industrial frequency withstand voltage effective value that can bear is more than the 30KV.C
jBe the turn-to-turn or the interlayer parasitic capacitance of winding itself, to not obviously influence of isolation performance.
In the power frequency equivalent circuit diagram: L
mBe magnetizing inductance, L
S1And L '
S1Be former limit equivalence leakage inductance, L
S2And L '
S2Former limit equivalence leakage inductance is all divided the both sides configuration to the scaled value on former limit.U
SrBe former limit power frequency supply input, with input voltage to secondary power-frequency voltage U
ScOutput transmits the equivalent parameters of industrial frequency AC electric energy.The turn-to-turn of each winding and interlayer parasitic capacitance C
j, its effect can be ignored.C
1, C
2Be respectively former and deputy limit CSET separately, use as high pass filter.
In the high frequency equivalent circuit diagram: under high frequency or pulse high-voltage effect, the equivalent circuit of transformer will be converted into capacitive character from inductive.The parasitic capacitance C of air main insulation between the circle of former and deputy sideline
0Value is very little and very high dielectric strength is arranged, and buffer action is mainly decided by it, and this is a two-way trap.
The transformer application of making according to the utility model principle has guaranteed the safe and stable operation of the IED that such is complicated fully in on-line overvoltage monitor for electric power system.The condition of work of this device in the operation electrical network is very abominable, it often bears the test of the earth potential rising transient process that various electric pressure grid short circuits of 10～500V and abnormal failure and various thunderbolt cause, and the high frequency or the pulse high-voltage ripple that in the transient process just of electronic installation invasion, produce.
Claims (3)
1. a chain of coupling high voltage impacts isolating transformer, comprise that former and deputy sideline circle and the fixing skeleton of supporting thereof constitute supplementary insulation, it is characterized in that: former limit winding is wound on equably and constitutes former limit iron-core coil on the annular iron core, the secondary winding turns to a pencil annulus formation secondary air core coil closely with loose coupling, the position, the center of circle that above-mentioned two close making toroidal coils of diameter pass separately constitutes a chain of shape outward appearance, and the air dielectric gap between them constitutes main insulation.
2. isolating transformer according to claim 1 is characterized in that: the main insulation air gap minimum between the circle of former and deputy sideline is no less than 5 centimetres, and between the nearest each point of former and deputy sideline circle identical air gap distance is arranged.
3. isolating transformer according to claim 1 is characterized in that: transformer case adopts high-intensity nonmetal insulating sheet material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97226880 CN2318700Y (en) | 1997-09-10 | 1997-09-10 | Interlink coupling high-voltage impact isolation transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97226880 CN2318700Y (en) | 1997-09-10 | 1997-09-10 | Interlink coupling high-voltage impact isolation transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2318700Y true CN2318700Y (en) | 1999-05-12 |
Family
ID=33940461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97226880 Expired - Fee Related CN2318700Y (en) | 1997-09-10 | 1997-09-10 | Interlink coupling high-voltage impact isolation transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2318700Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101268532B (en) * | 2005-09-20 | 2011-07-06 | 斯堪的诺维亚系统公司 | A foil winding pulse transformer |
| CN103187152A (en) * | 2011-12-29 | 2013-07-03 | 大连第一互感器有限责任公司 | Power supply isolation transformer of bow net detecting system |
| CN104089569A (en) * | 2014-07-03 | 2014-10-08 | 重庆大学 | Multifunctional transformer signal sensor based on capacitive coupling and signal acquisition method |
| CN108879983A (en) * | 2018-07-11 | 2018-11-23 | 西安电子科技大学 | The non-contact type apparatus for transmitting electric energy of electromagnetic force can be offset |
| CN112670687A (en) * | 2019-10-16 | 2021-04-16 | 亚德诺半导体国际无限责任公司 | High-frequency electrical isolator |
| US11711894B1 (en) | 2022-02-03 | 2023-07-25 | Analog Devices International Unlimited Company | Capacitively coupled resonators for high frequency galvanic isolators |
-
1997
- 1997-09-10 CN CN 97226880 patent/CN2318700Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101268532B (en) * | 2005-09-20 | 2011-07-06 | 斯堪的诺维亚系统公司 | A foil winding pulse transformer |
| CN103187152A (en) * | 2011-12-29 | 2013-07-03 | 大连第一互感器有限责任公司 | Power supply isolation transformer of bow net detecting system |
| CN103187152B (en) * | 2011-12-29 | 2015-06-24 | 大连第一互感器有限责任公司 | Power supply isolation transformer of bow net detecting system |
| CN104089569A (en) * | 2014-07-03 | 2014-10-08 | 重庆大学 | Multifunctional transformer signal sensor based on capacitive coupling and signal acquisition method |
| CN104089569B (en) * | 2014-07-03 | 2017-05-03 | 重庆大学 | Multifunctional transformer signal sensor based on capacitive coupling and signal acquisition method |
| CN108879983A (en) * | 2018-07-11 | 2018-11-23 | 西安电子科技大学 | The non-contact type apparatus for transmitting electric energy of electromagnetic force can be offset |
| CN112670687A (en) * | 2019-10-16 | 2021-04-16 | 亚德诺半导体国际无限责任公司 | High-frequency electrical isolator |
| US11152975B2 (en) | 2019-10-16 | 2021-10-19 | Analog Devices International Unlimited Company | High frequency galvanic isolators |
| CN112670687B (en) * | 2019-10-16 | 2022-01-14 | 亚德诺半导体国际无限责任公司 | High-frequency electrical isolator |
| US11711894B1 (en) | 2022-02-03 | 2023-07-25 | Analog Devices International Unlimited Company | Capacitively coupled resonators for high frequency galvanic isolators |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |