SU467458A1 - Pulse modulator - Google Patents

Description

3

The moment when the thyristor start pulse initially arrives at the control electrode of the thyristor 5, although the processes in the circuit remain unchanged even when the control pulse arrives at the thyristor 4.

The thyristor 5 at the time t opens, the charge capacitor 3 is discharged (Fig. 2, d to zero through the lower half of the primary winding 7 of the step-up transformer 6, and the charge capacitor 2 (Fig. 2, d) until the source source is charged. along the circuit: plus power supply 1 - the lower half of the primary winding 7 of step-up transformer 6 - thyristor 5 - minus the power supply source. At the same time, the energy stored in charge capacitors 2 and 3 at the moment of their charging and discharging charges the formation line capacitors 9 (Fig. 2, g). Upon completion of the processes in the scheme and availability In order to maximize the voltage on the capacitors of the formation line, the delayed for this time delay element 12 impulse goes to the submodule 13, the output impulse of which (Fig. 2, e) at time t ignites the thyratron 11, and the impulse appears on the load 10 of the modulator (Fig. 2, h).

Since the charging capacitor 3 is completely discharged, and the flow of the charging current of the charging capacitor 2 is stopped, due to the zero voltage on the anode of the thyristor 5 and the absence of current through it, the latter is turned off. After the deionization of the thyratron 11 is completed and the thyristor 5 is turned off, the circuit is immediately ready for the next triggering pulse.

By this time, the charging capacitor 2 is charged until the full voltage of the power source is full, and the charging capacitor 9 is discharged to 0. From the generator 15 of control pulses, the trigger pulse of the thyristor 4 (Fig. 2, e) at the time / s comes now thyristor 4, which opens, charge capacitor 2 is discharged to zero through thyristor 4 and the upper half of primary winding 7 of step-up transformer 6, and charge capacitor 3 is charged before the voltage of the power source Yacc is

four

plus power supply - thyristor 4 - upper half of the winding 7 of step-up transformer 6 - minus the power supply.

Then the processes are repeated, at the same time the LININ formation is charged to a voltage twice as high as at the moment of the passage of the very first pulse.

This is due to the fact that at the initial moment the capacitors 2 and 3 are charged up to half the voltage of the power source, and at all subsequent pulses to the full 1When the modulator is used in the non-interrupting device when the first pulse is turned on, one of the capacitors is turned off, and the first impulse is applied to the thyristor, which has this capacitance disconnected.

Subject invention

A pulse modulator containing a constant voltage source, a charge capacitor, a step-up transformer, parallel to the secondary winding of which a switch is connected, for example, a thyratron, shaping line and load, a starting pulse generator, a submodulator and a delay element connected between the trigger pulse generator and submodulator, I differ by the fact that, in order to increase the pulse frequency of the modulator, the primary windings of the step-up transformer are connected

thyristors whose control electrodes are connected to a control pulse generator whose start input is connected to a starting impuls generator, the anode of one thyristor connected to the positive pole of the power source and the cathode of the other to its negative pole, while the charge capacitor is formed from two series-connected capacitors, each of which is connected between the middle

the primary point of the step-up transformer and the poles of the power supply.

us /

g

I r

lg

FIG. 2