SU1455395A1 - Gas-discharge lamp igniting device - Google Patents

Abstract

The invention relates to electrical engineering. The aim of the invention is to improve the reliability of the ignition of the gas discharge lamp. The device contains a pulse transformer 4, a thyristor 1, diodes 6-10, 17-19, a storage capacitor 2, a choke 14 and a threshold element 11. The device ensures that high voltage pulses coinciding with the supply voltage across the polarity parameters, and the magnitude of the energy of the ignition pulses increases, which makes it possible to shorten the duration and increase the reliability of the ignition of the lamps. 1 il.

Description

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The invention relates to electrical engineering and can be used in lighting equipment for the ignition of gas discharge lamps.

The aim of the invention is to increase the reliability of ignition of gas discharge lamps.

The drawing shows a diagram of the device.

A device for firing gas discharge lamps contains a thyristor 1 connected in series, a storage capacitor 2 and a primary winding 3 of a pulse transformer 4, a resistor 5, diodes 6-10, a threshold element .11, a voltage divider 12, a secondary winding 13 of a pulse transformer 4, with one output connected via choke 14 to one of the terminals 15 for connecting the supply network, and the other terminal to one of the terminals 16 for connecting the gas discharge, we will accept the input of the threshold element 11 connected to the output of the voltage divider 12, and the output connected to the thyristor electrode 1, diodes 17-19, second storage capacitor 20, switch: pulse transformer 4 is provided with a second primary winding 21, diodes 6-9, form a single-phase rectifying bridge, the diagonal of the alternating current of which is connected between the combined drops. 14 and the secondary winding 13 of the pulse transformer 4 and the combined second terminals 22 and 23, respectively, for connecting the power supply network and the gas discharge lamp, the voltage divider 12 is connected to the DC diagonal, the positive voltage One single-phase emergency bridge is connected to the first supply terminal of the threshold element 11, the second supply terminal, which is connected to the combined terminals of the first storage capacitor 2 and the thyristor cathode t and one of the input terminals of the second storage capacitor 20, and through a resistor 5 made variable - with a negative output of a single-phase rectifying bridge, the anode of diodes 10 and 17 are connected, respectively, with the combined 1 AND terminals of the drossel 14 and the secondary winding 13 of the pulse transformer 4 and the combined torymi terminals 22 and 23 for Con Cheney supply and gas discharge

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lamps, and the cathode of diode 10 - with a different output of the second storage capacitor 20 and through the second primary / winding 21 of the pulse transformer 4 and the diode 18 connected with the diode 10 - with the anode of the thyristor 1 and the cathode of the diode 19, the anode of which is connected to the free output of the first the primary winding 3 of the pulse transformer 4, another output connected to the cathode of the diode 17.

The device works as follows.

After supplying the supply voltage to the device, alternating charge and discharge of capacitors 20 to 2, respectively, occur in the positive and negative half-periods of the supply voltage. The parameters of the divider 12 are selected in such a way that the opening voltage of the thyristor 1 exceeds the voltage on the lamp after its breakdown.

By varying the resistance of the resistor 5, due to the variation in the charging time of the capacitors 20 and 2, it is possible to achieve that during one half-period of the supply mains these capacitors will be discharged through the corresponding primary windings of the pulse transformer 4 several times, producing a high-voltage pulse packet. in the secondary winding 13 of the pulse transformer 4.

The primary windings 3 and 21 of the pulse transformer are identical and identical, and the capacitors 2 and 20 have the same capacitance. This ensures high polarity and my high voltage coinciding with the supply voltage with the same parameters, thus increasing the energy of the ignition pulses averaging over a period, which made it possible to shorten the duration and increase the reliability of the ignition of the lamps.

Claims (1)

Invention Formula A device for igniting a gas discharge lamp, comprising a thyristor connected in series, a storage capacitor and a primary winding of a pulse transformer, a resistor, five diodes, a threshold element, a voltage divider, a secondary winding of a pulse transformer, connected via one output terminal a choke with one of the leads for connecting the power supply network and another with one of the leads for connecting the gas discharge lamp, the input of the threshold element connected to the output voltage dividers, and the output connected to a thyristor control electrode, that, in order to increase the reliability of ignition of gas-discharge lamps, three diodes were additionally introduced into it, the second storage capacitor, the pulse transformer is equipped with a secondary element, the second power output of which is connected to the combined outputs of the storage capacitor and the cathode of the thyristor and with one of the terminals of the second storage capacitor, and through a resistor made variable, with the negative output of the single-phase rectifying bridge, the anodes of the fifth and sixth diodes are connected respectively with the combined outputs of the throttles and the secondary winding of the pulse transformer and combined second primary winding, the first four g outlets for connecting the power supply the diode form a single phase high voltage bridge, the diagonal of the alternating current of which is connected between the combined cables of the throttles and the secondary winding of the pulse transformer and the combined second terminals for connecting the power supply network and the discharge lamp, the voltage divider is connected to the diagonal of the direct current, the positive voltage of the single phase of the bridge is connected to the first supply terminal network and gas discharge lamp, and the cathode of the fifth diode - with a different output of the second storage capacitor and through the second primary winding of the pulse transformer and connected according to the fifth diode, the seventh diode - with the thyristor anode and cathode of the eighth diode, the anode of which is connected to the free output of the first the primary winding of a pulse transformer, another connected to the cathode of the sixth diode.