SU1261089A1 - Single pulse generator - Google Patents

Abstract

The invention can be used to control breakdown voltages of arresters as valve voltages. and spark in a wide range of operating frequencies. The purpose of the invention is to simplify the design by reducing the number of elements. The device contains a thyristor 1, load 2, power supply buses 3 and 4 of the AC network, diodes 6, 11 and 13, resistors 9 and 10, start contact 7, distor 8, capacitors 5 and 12. Thyristor 1 and diode 6 are connected to one the same bus 3 with opposite electrodes, and diodes 6, 11 and 13 and dynistor 8 are connected in the same direction with respect to the voltage on buses 3 and 4. 1 sludge. / V W d tS5 o: 00: o

Description

The invention relates to a pulse technique and can be used to control the breakdown voltage of both valve and spark dischargers in a wide range of operating frequencies. The device can also be used for pulsed magnetization of permanent magnets in a pitanin from a direct current network.

The aim of the invention is simpler. construction by reducing the number of elements.

The drawing shows a circuit diagram of the device.

A single pulse shaper contains a thyristor 1 connected in series with load 2 between the supply buses 3 and 4 of the AC network, the first capacitor 5 connected to buses 3 and 4 through the first diode 6 and the starting contact 7, distor 8 connected in series with the first resistor 9 between the plates of the capacitor 5 and the anode connected to the cathode of the thyristor -1. The connection point of the dynistor 8 with the resistor 9 is connected to the control electrode of the thyristor 1 through a second resistor Yu connected in series, shunted by the second diode 11, and the second capacitor 12. The third diode 13 is switched counter-parallel to the control transition of the thyristor 1.

Thyristor 1 and diode 6 are connected to the same bus 3 by different electrodes, while diodes 6, 10, 13 and dynistor 8 are connected in the same direction with respect to the voltage on pshnakh 3 and A.

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The device works as follows.

In the first negative half-period of the supply voltage, after closing the starting contact 7, the capacitor 5 is charged through pin 7 and diode 6. On the circuit: bus 3, pin 7, diode 6, resistor 9, diode 11, capacitor 12, diode 13, bus 4, The capacitor 12 is charged to turn on the voltage of the dynistor 8. After turning on the dynistor 8, the capacitor 12 begins to discharge in the circuit: capacitor 12, the control electrode-cathode transition of the thyristor 1, distor 8, resistor 10, capacitor 12, causing the spur current to flow through thyristor control transition 1,

the most thyristor 1 is prepared for discovery. The next positive semi-; The period of the supply voltage, the direct current flowing through the control transition of the thyristor 1, opens it when the supply voltage is close to zero, and a positive half-wave of the supply voltage is generated at the load 2. When the polarity of the supply voltage is changed, thyristor 1 is turned off. The constant discharge time of the capacitor 12 is selected within one half period of the supply network.

Due to the inclusion of the dynistor 8, the charge of the capacitor 5 is further excluded, and hence the formation of subsequent pulses at a given closure of contact 7, the constant discharge time of the capacitor 5 is selected within one period of the supply voltage.

After closing the contact 7, the capacitor 5 through the period of the supply

the voltage is discharged and the circuit returns to its original state. If in this negative half-period after the closure of contact 7, dynistor 8 cannot turn on

the inclusion of the thyristor 1 in the positive half-period will not occur. Thyristor 1 is turned on only after turning on the dynistor 8,

Claims (1)

Invention Formula A single pulse shaper containing a thyristor connected by a noc-f next to the load between the supply lines of the AC network, the first capacitor connected to the supply buses through the starting contact and the first diode, the dynistor, two resistors, the second capacitor, the second and the third diodes, the first the diode and the thyristor are connected to the same supply bus with opposite electrodes, and the dynistor and the first diode are connected in the same direction with respect to the supply voltage, which is different in that In this case, the dynistor is connected in series with the first resistor between the plates of the first capacitor and is connected to the thyristor cathode, the junction point of the - dynistor with the first resistor is connected to the control electrode of the Thyristor through a series connection the second capacitor and the second transition thyristor and in the same resistor ,. shunted by the second direction with the second and the first diode diode, and the third diode is turned on with respect to the supply voltage of the control unit opposite to the parallel one.