SU767932A1 - Single-channel device for pulse and phase control of thyristor converter - Google Patents

Description

ШШ5 а№ра is connected to the input of the pulse distributor.

FIG. 1 shows a block diagram of a single-channel device for pulse-phase control; in fig. 2 - time diagrams of the scheme;

The zero-organ 1, the input pulse shaper 2 and the phase shifter 3 are connected in series, the output of the phase shifter 3 is connected to the first input of the switch. 4, consisting of two series-connected elements OR NOT, the output of which is connected to the input of the distributor 5 pulses. The zero output of the distributor 5 pulses is PED connected to the third input of the switch 4 and to the input of the controlled oscillator 6 of stabilized frequency, its output is connected to the second input of the switch 4. The output of the distributor 5 pulses is connected to the input of the high-power amplifier-formers unit 7

The device works as follows.

The zero-organ 1 at the time of the network voltage passing through zero produces a pulse of a certain duration, which is fed to the input shaper 2 of pulses, which is a one-shot, which produces a pulse of duration equal to the range of the thyristors unlocking. Next, the iKTpulse enters the phase-shifting device 3, where its leading edge shifts to the value of the thyristors and is simultaneously formed a pulse-comaid that passes through the switch 4 to the distributor 5 pulses. One of the distributor triggers 5 мп ул роки с О оп оп overturns, resulting in a signal at the zero output of the distributor 5 pulses, which turns on a controlled frequency controlled oscillator 6 and prohibits the signal from the phase shifter 3 through the switch 4. Pulses from the controlled generator output 6 stabilized Frequencies are fed through the switch 4 to the distributor 5 pulses, which distributes them across the control channels. Next, the pulses go to the block of output amplifiers-formers 7, from the output of which they are fed directly to the control electrodes of the thyristors. When the pulse passes through the last control channel at the zero output of the distributor 5 pulses, the signal disappears, which

It leads to the termination of the controlled oscillator L of the stabilized frequency and the resolution of the command signal from the phase-shifting unit 3. A new cycle of the device operation takes place.

The proposed solution allows to significantly simplify the input pulse shaper, improve the symmetry of the trigger pulses by introducing a controlled oscillator of a stabilized frequency, and also improve the stability

operation of the control system, since the signal from the network is initiating to perform one cycle of operation of the circuit.

Claims (2)

1. USSR author's certificate number 349072, cl. H 02 R 13/16, 1971. 2. Sitnik N. Kh. / Shurupov G. N. Power silicon valve blocks. M., “Energie, 1972. p. 30 fig. 1-21.