SU813668A1 - Device for control of thyristorized converter - Google Patents

Description

(54) A DEVICE FOR CONTROLLING A THYRISTOR TRANSMITTER The goal is achieved in that the device for controlling a thyristor converter is equipped with a low-pass filter with linear characteristic, a comparator and a fiber with a two-input filter, and a connector through a divider. rectifier, output filter turn the comparator is connected to the first input of the phase actuator, the output of which is connected to the input of the driver for controlling the reverse control of the H) JM bridge, and the second input of the phase shifter is connected to the output master oscillator house. On fi1. 1 shows a functional diagram of the device for controlling the converter in FIG. 2 is a variant of the phase shifter flowchart; in fig. 3 - time diagrams of the control device; figure 4 is a timing diagram of the work of the world. The device for controlling the power supply contains a generator 1, dividers and 3 frequencies, shapers 4, 5 pulses of amplification, high-frequency inverters b and 7f rectifier 8, forms of control valve 9, reversing bridge 10, load And, divider 12 of the input signal, ( () low pass (LPF,) 13, comparator 14, phase shifter 15, inverting amplifier 16, linear variable voltage generators 17, 18 (CLAY) block 19 adding output signals GLIN 2 and 3, comparator 20, frequency detector 21 ., inverting amplifier 22, LC trigger 23, cxeky 24 shaping van mougolnoh of alternating voltage. The signal at the low-pass filter input is shown in FIG. 3 a-f signal on the output fsach on. fig.Zb ;, the signal at the output of the comparator - on fig.Z; The signal at the output of the phase shifter in FIG. 3 d of FIG. 3 D, E — the control pulses of the thyristors of the reversing bridge — in Fig. 3 d, the e-f signal applied to the load — on FIG. 3 g. The signal at the input of the phase shifter is presented in figure 4 and the signal at the output of GLINE 2 is shown in figure 4; 6; the signal at the output of GLINE 3 is shown in figure 4; the signal at the input of the comparator (Vj, is the reference voltage) in Fig. 4 g; the signal-al at the output of the comparator is in FIG. 4, the D5 signal at the output of the inverting amplifier in figure 4 e; the signal at the output of the phase shifter is in FIG. 4 g. The device works on time. Pulses from generator 1, using frequency dividers 2 and 3 and 4 n 5 pulse formers, control thyristor RF inverters 6 and 7, which generate sinusoidal signals of close frequencies. The signal of the beats of two high-frequency oscillations is fed to the output of the rectifier U. From its output, a signal of positive polarity (Fig. 3 L) is fed to the input of the reversing bridge 10, which causes a change in the polarity of the signal with a half-difference frequency of two RF oscillations, and through a divider 12 - to the input of the low-pass filter 13 (figure 1). The low-pass filter selects a sine-wave signal (Fig. 3B) with a frequency equal to twice the frequency of the output signal from the converter} the phase shift of the signal at the output of the low-pass filter changes linearly when the frequency of the converter is tuned. From the output of the comparator 14, the square-shaped signal Sfig.Z enters the phase shifter 15, where the phase shift Φ introduced by the low-pass filter is compensated (Fig. 3 g). The phase shift of the output signal of the phase shifter (Fig. 4 g) varies linearly from 0 ° to 180 ° with control of the magnitude of the reference voltage UQ (Fig. 4 g). By selecting the reference voltage DO, one can compensate for the phase shift H introduced by the low-pass filter at the center frequency of the band. In order to compensate the phase shift of the low-pass filter in the entire frequency control band of the converter simultaneously with its restructuring, frequency detector 6 ,, is connected to the reference alternating voltage 9 with the master oscillator as a source of the reference voltage UQ phase shifter (Fig. 2} Thus When adjusting the frequency of the converter, the polarity change of the signal applied to the load by a reversible bridge will always occur at the moments of the transition of the envelope of this signal through zero (Fig. 3 g) .. This allows you to improve the spectrum of the output signal of the converter during frequency tuning. invention Formula A device for controlling a thyristor converter on two inverters with a rectifier and a reversing bridge, containing a master oscillator connected via a frequency divider to the driver inverter control pulses, the control pulse former is reversible by a 1-1 bridge, characterized in that, in order to improve the spectral composition of the output signal of the converter, frequency tuning, it is equipped with a low-pass filter with a linear phase characteristic, a comparator and a phaser with two inputs, the filter input through a divider connecting to the rectifier output, Fiptra output through a comparator connected to the first input of the phase shifter, the output of which is connected to the driver input control pulses of the reversing bridge, and the second input of the phase shifter is connected to the output of the master oscillator.

Sources of information taken into account in the examination

1. Melnichuk L.P. Single phase low frequency generator. Sat Problems of technical electrodynamics Kiev, Naukova Dumka, 1974, 45, p. 70-73

2. USSR author's certificate

No. 543124, cl. And 02 P 13/16, 1975.

Phage 7

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Claims (1)

Claim A device for controlling a thyristor 'converter on two inverters with a rectifier and a reversing bridge, containing a master oscillator connected via frequency dividers to the inverter control pulse shapers, a reverse bridge control pulse generator, characterized in that, in order to improve the spectral composition of the converter output signal when tuning the frequency, it is equipped with a low-pass filter with a linear phase response, a comparator and a phase shifter with two inputs, and in filter stroke through the connection divider 81 '36 6 8 i-th <<rectifier output, the filter output through the comparator is connected to the first input of the phase shifter, the output of which is connected to the input of the pulse shaper to control the reverse bridge, and the second input of the phase shifter is connected to the output of the master oscillator.