CN103852657A - Lightening electric field simulation device based on parallel plate transmission line - Google Patents

Abstract

The invention discloses a lightening electric field simulation device used for electromagnetic environment effect tests. The lightening electric field simulation device comprises an impulse wave generator, a field forming device and a terminal load. The impulse wave generator comprises a charging power supply, high-voltage pulse capacitors C1 and C2, a non-inductive high-voltage resistor R1 and a spherical peaking switch S. Discharge of the impulse wave generator is controlled by the spherical peaking switch S. U1 is the charging voltage of the main capacitor C1, and U2 is the voltage across the two ends of the peaking capacitor C2, namely the output voltage. A parallel plate transmission line is used as the field forming device. The terminal load is a non-inductive high-voltage resistor R2. The time t1 to crest of a simulated lightening electromagnetic field can be regulated by regulating the high-voltage resistor R1, and the half-peak value time t2 of the lightening electric field can be regulated by replacing the terminal load resistor R2. The lightening electric field simulation device has the advantage of being capable of regulating parameters conveniently, high in reliability, low in cost and the like.

Description

A kind of thunder and lightning electric field simulation device based on parallel-plate transmission line

Technical field

The present invention relates to a kind of thunder and lightning electric field radiation environment analogue means.

Background technology

Thunder and lightning is a kind of common spontaneous phenomenon.According to statistics, there are about 1000 thunderstorms and 200 lightnings average p.s. in earth surface.Thunder discharge is large-scale.While there is lightning, in lightning channel, have the pulse current up to the transient pulse voltage of millions of volts, the training of a little Wan An, current-rising-rate can reach several ten thousand A/ μ s, so the space around lightning channel can produce strong Lightning electromagnetic radiation, can bring harm to the mankind.Thunder and lightning causes disaster to mainly contain two kinds of approach, and the firstth, direct lightning strike, the secondth, induction thunder.Induction thunder is mainly to cause disaster by Lightning Electromagnetic Fields, not only can severe jamming radio communication and the normal work of equipment, and bring huge economic loss to various hi-tech industries; And can cause very large threat to various electronic electric equipments.Along with the fast development of electronics science and infotech, the loss being caused by Lightning Electromagnetic Fields is more and more heavier, endangers increasing.Because the generation of thunder and lightning has very strong randomness, so be difficult to be directly used in experimental study.Therefore, simulate Lightning Electromagnetic Fields with experimental technique and have very important significance, can be for carrying out the safety and reliability research of electronic information equipment under Lightning Electromagnetic Fields effect.

Carry out at present lightning current immunity experiment both at home and abroad many, the waveform of the lightning current providing as IEC62305-1 etc. according to existing standard is carried out electric current injection test, such as fighting back first waveform 10/350 μ s, follow-up counterattack 0.25/100 μ s etc.GJB3567-99 military aircraft lightning protection design test method, the mode that regulation adopts impulse voltage generator directly to discharge to aircraft is identified the thunder-lightning ability of military aircraft.Because the technical characterictic of Lightning Electromagnetic Pulse field, space does not also have clear and definite standard, so carry out the little of simulation Lightning electromagnetic radiation field test.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of small-sized Lightning Electromagnetic Pulse field stimulation device based on transmission line theory, it not only can realize the simulation of Lightning Electromagnetic Pulse field, according to the needs of equipment effect test, regulate arbitrarily its wavefront time and half peak time, and there is higher efficiency, be applicable to the Lightning electromagnetic radiation effect test of small-sized equipment and electronic unit.

For solving the problems of the technologies described above, the present invention is for Lightning electromagnetic radiation field stimulation.Device comprises that surge waveform apparatus for converting, radiation of lightening discharge field form device and terminator, amount to three parts as shown in Figure 1.

Described surge waveform apparatus for converting structure, as Fig. 2, comprises power supply, two capacitor C ₁, C ₂with wavefront high-tension resistive R ₁and ball type switch S composition; Wavefront resistance R ₁one end be connected with the output terminal of ball type switch, the other end and peaking capacitor C ₂high-pressure side be connected, peaking capacitor C ₂another termination the earth, ball type switch S one end and wavefront resistance R ₁, the other end and charging capacitor C ₁be connected.

Described forms device employing parallel-plate transmission line, and its high-pressure polar plate is connected with ball type switch S, and another pole plate connects the earth, in the mode of electromagnetic transmission, capacitor C ₂the pumping signal providing is converted to electromagnetic field, for the test of equipment electromagnetic environmental effects provides uniform field test space.

Affiliated terminator is resistance R ₂, be connected between the high-pressure polar plate and the earth that form device, match for the electromagnetic pulse field characteristic impedance that guarantees its impedance and simulation, avoid producing reflection, the Lightning electromagnetic radiation environment that impact is simulated.

Advantage of the present invention is:

1. the conversion usefulness of electric energy and electromagnetic energy is higher, can reach 80%.

2. the circuit of design has higher dirigibility.With the principal character of two exponential waveform simulations Lightning Electromagnetic Pulse field, realize the laboratory simulation of thunder and lightning electromagnetic environment; By changing wavefront resistance, terminator resistance, can the independent regulation wavefront time, half time to peak, meet the needs of equipment thunder and lightning electromagnetic environmental effects experimental study;

3. can produce the field of radiation of lightening discharge relatively uniformly environment, can be for thunder and lightning electric field radiation effect test.

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.

Fig. 1 is that thunder and lightning electric field simulation device of the present invention forms block diagram.

Fig. 2 is the circuit theory diagrams of thunder and lightning electric field simulation device of the present invention.

Embodiment

Fig. 2 is the circuit theory diagrams of thunder and lightning electric field simulation device of the present invention: charge power supply adopts high-voltage ac power.

To circuit shown in Fig. 2:

U ₁＝U ₂+I ₁R ₁ (1)

U ₂＝I ₂R ₂ (2)

${\mathrm{<figure-callout\; id="1"\; label="I"\; filenames="HSA00000816797800011.png"\; state="\{\{state\}\}">I</figure-callout>}}_1=-{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000816797800011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1\frac{{\mathrm{<figure-callout\; id="1"\; label="dU"\; filenames="HSA00000816797800011.png"\; state="\{\{state\}\}">dU</figure-callout>}}_1}{\mathrm{dt}}---\left(3\right)$

$I_1-{\mathrm{<figure-callout\; id="2"\; label="I"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">I</figure-callout>}}_2={\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">C</figure-callout>}}_2\frac{{\mathrm{<figure-callout\; id="2"\; label="dU"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">dU</figure-callout>}}_2}{\mathrm{dt}}---\left(4\right)$

Arranging above-mentioned 4 equations obtains:

$R_1{R}_2{C}_1{C}_2\frac{d^2{\mathrm{<figure-callout\; id="2"\; label="U"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">U</figure-callout>}}_2}{{\mathrm{<figure-callout\; id="2"\; label="dt"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">dt</figure-callout>}}^2}+(R_2{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+R_1{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000816797800011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+C_1{R}_2)\frac{{\mathrm{<figure-callout\; id="2"\; label="dU"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">dU</figure-callout>}}_2}{\mathrm{dt}}+{\mathrm{<figure-callout\; id="2"\; label="U"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">U</figure-callout>}}_2=0---\left(5\right)$

For improving transfer efficiency, require C ₁> > C ₂, R ₁< < R ₂.Now, the electromagnetic pulse field wavefront time t that simulation system produces ₁, half time to peak t ₂be respectively:

${\mathrm{<figure-callout\; id="1"\; label="t"\; filenames="HSA00000816797800011.png"\; state="\{\{state\}\}">t</figure-callout>}}_1\&ap;2.33\frac{R_1{R}_2}{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000816797800011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}\&times;\frac{C_1{C}_2}{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000816797800011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000816797800011.png,HSA00000816797800012.png"\; state="\{\{state\}\}">C</figure-callout>}}_2}\&ap;2.33R_1{C}_2---\left(6\right)$

t ₂≈0.72×(C ₁+C ₂)×(R ₁+R ₂)≈0.72C ₁R ₂ (7)

By regulating R ₁, C ₂value, i.e. capable of regulating wavefront time t ₁; And adjusting C ₁, R ₂capable of regulating half time to peak t ₂.When harmonic, be according to measured waveform regulating circuit parameter, to obtain reference waveform, as strengthened R ₁or C ₂can increase the rise time, strengthen C ₁or R ₂can increase half band-width.In the time determining circuit parameter, should first determine the lightning wave parameter of simulating, then determine the value of electric capacity according to mentioned above principle, finally can draw the value of resistance.In engineering practice, electric capacity ratio of transformation is changed resistance and is wanted difficult, thus mainly regulate the radiation of lightening discharge field wave shape of simulation by changing resistance value, to meet the needs of equipment electromagnetic environmental effects test.

Claims (2)

1. the Lightning Electromagnetic Pulse field stimulation device for electromagnetic environmental effects test, comprise surge generator, formation device and terminator, this device can be simulated by regulating resistance the electromagnetic pulse field of the multiple thunder and lightning waveform generation by national Specification, it is characterized in that:

Described surge generator comprises charge power supply, high-voltage pulse capacitor C ₁, C ₂with noninductive high-tension resistive R ₁and spherical peaking switch S composition, its electric discharge is by the control of spherical peaking switch S, U ₁main capacitor C ₁charging voltage, U ₂high-voltage pulse peaking capacitor C ₂the voltage at two ends, i.e. output voltage, for the pulse excitation source that provides is provided electromagnetic pulse field, can be by regulating wavefront high-tension resistive R ₁adjust lightning wave wavefront time t ₁, by regulating terminator resistance R ₂adjust lightning wave half time to peak t ₂, to meet the needs of simulation various criterion lightning wave electromagnetic environmental effects test;

Described forms device is a parallel-plate transmission line, its high-pressure polar plate and high-voltage pulse peaking capacitor C ₂be connected, for many parallel copper conductors, another pole plate is rectangle aluminium sheet, be connected with the earth, the pulse voltage pumping signal that surge generator is produced is converted to the Lightning Electromagnetic Pulse field producing between two parallel plate electrodes, provides test space for carrying out the test of electromagnetic susceptibility installation electromagnetical environmental effect;

Described terminator is a noninductive high-tension resistive, is connected between the high-pressure polar plate and the earth of parallel-plate transmission line, and the electromagnetic wave wave impedance of transmitting with parallel-plate transmission line matches.

2. the simulation for other electromagnetic pulse fields by above-mentioned design philosophy, is also subject to the protection of this patent.

Images