RU1623088C - Discharger of static electricity - Google Patents

Abstract

The invention relates to the protection of aircraft against static electricity discharges. The purpose of the invention is to increase the efficiency of the discharge during the power supply system to increase the discharge current and reduce the amount of damage created by the static radio frequency converter, containing two or more replicating voltage sensors, each year 1, each of which is connected to the air vessel by a transformer resistor 2, and I have a resistor - The electrode allows suppressing pulses of the discharge current or increasing their amplitude. The distance between the ridge of adjacent corona electrodes is selected no more than 3 mm. that obgtyuchmveet r-CHAIMMPR VLIGCHMP GOG D H / -protiv Ppl-i section and prevents the total current flowing through the discharge 1 il

Description

FIELD OF THE INVENTION This invention relates to the protection of aircraft against static electricity discharges using discharges.

The aim of the invention is to increase the efficiency of the discharge by increasing the discharge current and reducing the level of interference generated.

The drawing shows the electrical circuit of the slug.

Two or more corona electrodes 1 (three in the drawing) have the shape of needles. Each of the corona electrodes is connected through one of the resistors 2 to the body of the aircraft. The distance between the points of the adjacent needles is chosen not more than 3 mm and not less than the value of R, mm, where R is the value of the resistor. Ohm The value of the resistor R is selected from the condition of suppressing the current pulse during the discharge and amounts to several MΩ

The discharge process proceeds as follows.

Let a current pulse And occur at one of the corona electrodes 1, for example, on the average, while a certain average direct current I flows through the extreme currents (in the particular case I - 0) In the middle circuit, the voltage Ui RH drops. in the extreme 1) 2 RI2 circuit, between the middle and each extreme tip, a potential difference U - Rli Rl2 Rli (1 - l2 / h) Rli (since the current in the pulse is much larger than the average current) and the corresponding electric field are the lines of force shown in the drawing arrows As a result, the resulting field at the middle tip decreases, at the extreme increases, as a result of which the current pulse at the middle tip is suppressed, and on the other tips there are conditions for igniting the discharge or some increase in the current, partially compensating for the decrease in the average current and.

In those conditions when the discharge is stable and through the tip all flows

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a constant current of equal magnitude, a potential difference between the tips is absent, a blocking field does not occur, and the current-voltage characteristic of the discharge does not deteriorate. The distance d between the points is significant. At distances x d 3 mm, the effect of mutual interference of the electrodes is weakly expressed. The minimum distance between the electrodes is selected from the condition that there is no breakdown between the needles at current pulse amplitudes of up to 100 µA and a breakdown average potential gradient between the tips of 10 kV / cm and is R (mm). The value of the resistance R (Ω) is selected from the condition for suppressing the pulse current of the VFOO μA discharge.

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Claims (1)

SUMMARY OF THE INVENTION A static electricity discharge comprising corona electrodes having the shape of a needle and galvanically coupled to the housing of a protected object, characterized in that, in order to increase the discharge efficiency by increasing the discharge current and reducing the level of generated interference, each of them has a corona the electrode is connected to the body of the protected object through a separate resistor, and the distance between the tips of adjacent corona electrodes is not more than 3 mm and not less than 10 R (mm), where R is otivlenie resistor (ohm), which is selected from conditions suppressing pulsed current discharge.