SU363192A1 - & IBL1-YuGNN lU, i - Google Patents

Description

one

The invention relates to the field of pulsed technology and, in a half-hour, to thyristor relaxation generators of low frequency pulses.

Known thyristor relaxation hederator low-frequency pulses, containing the time setting 7 C-circuit with a charging resistor and a storage capacitor, a t-thyristor with a load in the discharge circuit of the storage capacitor, a neutralizing current element of the thyristor consisting of a resistive divider and a diode, and also an external source of reference pulses.

The purpose of the invention is to increase the stability of the generation frequency.

To achieve the goal, the source of the reference pulses is connected to the control circuit of the thyristor through a diode-transformer valve, the potential input of which is connected to the midpoint of the time of the master C-circuit.

Diagram of the device is given in the drawing.

The generator works as follows.

Before supplying the supply voltage, the storage capacitor 1 is discharged, and the reference pulses from the external source through the transformer 2 arrive at the input of a diode-transformer valve, consisting of diode 5 and transformer 4. The frequency of the reference pulses significantly exceeds the frequency of the generator . When the power supply is turned on, the charge of the capacitor 1 starts through the charging resistor 5. The voltage drop across the resistor 5 from the charge current of the capacitor 1, at the first moment equal to the supply voltage, decreases as the capacitor charges. As long as the voltage across the resistor 5 exceeds the amplitude of the reference pulses on the secondary winding of the transformer 2, the diode transformer valve is locked and the reference pulses do not penetrate the control circuit of the thyristor 6. When the voltage drop on the resistor 5 becomes less than the amplitude of the reference pulses on the secondary winding of transformer 2, the next reference pulse opens diode 5 and a pulse is turned on in the secondary winding of transformer 4 including thyristor 6. The thyristor 6 turns on and discharges capacitor 1 to load 7. le, the capacitor 1 discharges Dietz, the anode current flowing through the thyristor, is insufficient to hold it in the ON state, and the thyristor 6 is turned off It appears circuit in the initial state. In necessary cases, artificial switching can be used to turn off the thyristor. When the thyristor 6 is turned off, the voltage across its anode, created by a divider of resistors 8 and 9, must exceed the voltage to which the capacitor / is charged.

by the time the thyristor is turned on. In this case, the diode 10 is locked — the time of charging the capacitor / and the leakage current of the thyristor 6 does not affect the process of its charging.

Subject invention

Thyristor relaxation generator (low-frequency pulses, containing the time of the master / C-circuit with a charging resistor and a storage capacitor, a thyristor with

a load in the discharge capacitor discharge circuit, a thyristor leakage neutralization element consisting of a resistive divider with a diode, and an external source of reference pulses, characterized in that, in order to increase the stability of the generation frequency, this source of pulses is connected to the thyristor control circuit through the diode-transformer valve, the potential input of which is connected to the midpoint of the time of the master / C-circuit.

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