SU495020A2 - Device for firing gas discharge impulse lamp with duty arc - Google Patents

Abstract

1. DEVICE FOR HEAVING A PULSE GAS-DISCHARGE LAMP DURING ARC pov. St. NO 352420, characterized in that, in order to increase the reliability of the device. A stabilizer is shunted with a transistor switch controlled by a signal with pulse ~ 2, the device according to claim 1, characterized in that, in order to obtain the specified signal, inter-racial inductivity included on the side of the impulse gate. and the input of the transistor switch are connected afterwards, consistently, a matching transformer and a coaxially interconnected rectifier and integrating PC ^ -chain ^ ka.A1ShD | D ^ teaiaaa

Description

According to the main auth. № 35242O known device CPU power the impulse of gazorazr tsnyh lamps, comprising a charging circuit consisting IE posletsovatelno connected charging thyristor choke and accumulating ijOHaeHcaTopa a discharge circuit consisting blow out successively coupled discharge thyristors forming the inductor and the current source comprising a smoothing choke and shunting zener diode, with the current source connected in parallel with the output of the discharge circuit through the anode, which is connected with respect to the current source in the forward direction.

A disadvantage of the known device is that the power of segmentation at the zener diode sharply increases with increasing discharge frequency, with increasing duration of discharge pulses and using gas discharge lamps as pressure, as a load, and in the latter the voltage of the lamp increases standby mode.

In order to increase the reliability in the proposed device, it is stabilized by a transistor, controlled by its signal from the pulse input of the lamp, and to form the specified signal between the discharge inductance; included in the circuit of the lamp from the side of the pulse input and the input of the transistor switch, included after the center of the transformer ™ but a matching transformer and connected between each other in parallel to the recorder and the integrating RC-chain.

Fig. 1 is a schematic diagram of the proposed device; in fig. 2c pulse diagram on discharge inductance | in fig. 2 6. pulse diagram on the output of the s-combining PC-chain; in fig. 2 b pulse diagrams at the output of the “mitel”; Fig. 2, t is a pulse diagram at the output of the coincidence circuit.

The pulsed power supply of the device is carried out from a source of constant voltage. Pulsed power

the gas discharge lamp on duty arc is supplied from the current source 2 through the smoothing choke 3 and diode 4. The ignition circuit of the pulsed gas discharge lamp in the drawing is not shown to simplify the understanding of the operation of the circuit. When a triggering pulse is applied to the control electr

The charging thyristor 5 starts the oscillating charge of the capacitive storage 6 through the choke 7. After the charging current passes through the zero charge, the thyristor closes and the storage capacitor turns out to be charged with the source voltage double voltage. At the moment when the triggering pulse is applied to the control electrode of the discharge thyristor 8, a capacitive accumulator is discharged through the discharge noise 9 to the burning pulsed lamp 10. At the time of discharge of the capacitive accumulator onto the lamp, the voltage on the last one increases sharply, and the diode 4 is closed, since the voltage at the output of the current source is limited by the stabilization voltage of Zener diode 11. For the duration of the action of the power pulse, the current of the current source and throttle 3 is closed to the Zener diode. During a time equal to the duration of the discharge pulse, the voltage on the lamp decreases to the value of the stabilization voltage of the Zener diode, while the latter leaves the stabilization mode and the entire current of the current source switches to the lamp. The processes are then repeated in the order described above.

Elimination of the overload of the Zener diode power is suppressed by installing the transistor switch 12 parallel to the Zener diode. The key is controlled by pulses (Fig. 2), which through the matching transformer 1 arrive at the input of the integrating RC chain 14, 15 and the input of the rectifier 16. The output pulses of the integrating RC chain through the dioce 17 arrive at the input of the coincidence circuit 18. The same input of the coincidence circuit receives pulses from the output of the rectifier. At the output of the coincidence circuit, an impulse is formed, the shape of which is represented in FIG. 2g.

The pulse formed by the coincidence circuit is fed to the base of the transistor switch 12 connected in accordance with the common emitter circuit. When this happens, the transistor opens and shorts the output of the current source. Shifting the Zener diode by a transistor eliminates overheating of the Stabilizer at the moment of the action of a current power pulse on the lamp. The shunting of the current source by the transistor reduces the ripple of the current of the pilot arc, and therefore increases the reliability of burning the gas-supply lamp in the pauses between the power pulses.

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Claims (2)

1. A DEVICE FOR IGNITION OF A PULSE GAS DISCHARGE LAMP BY AN ACCESSORIES on aut. St. No. 352420, characterized in that, in order to increase the reliability of the device, the zener diode is shunted by a transistor switch, controlled by a signal from the pulse input of the lamp ,, 2. The device according to π. 1, characterized in that, in order to obtain the specified signal, between the discharge inductance included on the pulse input side and the input of the transistor switch, a series-matching transformer and a rectifier and an integrating RC circuit connected in parallel are connected.