SU340029A1 - A.-M. A.-M. Abdulaev, V.Yu. Baranovsky and A.A.-Got ZadeG '' ^ G: (^), - ЗЗНДЯОТТ ^ - Google Patents

Description

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Known sources; a stabilized voltage containing a controlled rectifier, a transistor blinking generator, a relaxation generator made on a transistor with a capacitor connected in parallel with an emitter-to-junction transition, a load and a feedback circuit resistor, have a low stabilization response during transients and have low stabilization factor.

In order to improve the stabilization speed during transients, as well as the stabilization factor in the proposed voltage source, one of the load terminals is connected to one of the capacitors of the relaxation generator, the other capacitor lead is connected via a feedback resistor to the series-connected with a different load output. In this case, the emitter of the transistor blocking generator is connected through a capacitor to the base of the transistor of the relaxation generator.

FIG. Figure 1 shows a block diagram of a proposed source of stabilized voltage; in fig. 2 - the principle scheme of the phase-shifting device and the pulse generator; in fig. 3 - stress diagrams showing the operation of a phase shifter.

The stabilized voltage source consists of a controlled thyristor rectifier 1 with a control system 2. The control system, in turn, contains a phase shifter 3, a generator of 4 pulses, a distributor 5 and shapers of 6 high-power pulses. The feedback circuit 7 connects the source output to the phase shifter, 8 - the load.

A phase shifter (Fig. 2), operating according to the principle of "vertical control," contains a relaxation generator consisting of a transistor 9, a capacitor 10 and a resistor 11; and a setting device consisting of a capacitor 12, a diode 13 and a resistor 14. Transistor 15, pulse transformer 16 and DIODE 17 constitute a standby blocking generator circuit that performs the functions of a pulse generator 4.

The synchronizing pulses on the transistor 9 of the relaxation generator are iodine directly from the blocking generator at the time of the zero-organ response. This is accomplished with a capacitor 18 and a resistor 19.

Feedback from the output of the gel rectifier / output to the capacitor 10 of the relapsing generator through a variable resistor 20 and the zener diode 21.

Phase-shifting device works in the following manner.

When the supply voltage is applied, the charge of the capacitor 10 from the source 22 of the reference voltage through the resistor 11 occurs. Met. Feedback coupling is proportional to the output voltage of the rectifier and is opposite to the sign of the voltage of the reference voltage source. The feedback current changes the charge rate of the capacitor 10 and, accordingly, the control angles of the thyristors so that the average value of the rectified rectifier output voltage remains almost unchanged.

In steady state, the thyristor control angle is set to a specific value. The stability of the output voltage of the rectifier depends mainly on the regulating characteristic of the rectifier and the function of changing the voltage of the capacitor 10.

FIG. 3, diagram a corresponds to the output voltage of a single-phase full-wave rectifier when operating on an ac: tinnuyu: load, diagram b - voltage difference (UOU-UB), diagram c - voltage on the capacitor plates 10 (). Iok is the reference voltage of source 22.

The first four half periods in these diagrams correspond to the nominal amplitude of the working voltage of the rectifier (from the third half period there occurs an accidental decrease in the angle of regulation of the thyristor from impulse noise). At the beginning of that half-period, amplitude-U- increases. The unlocking of the thyristor in this half-period occurs depending on the average value of t / in for the previous half-period. Naturally, the control angle in the fifth half-period does not change and the average value of t / in increases.

In accordance with the increase in U stroke.: The charging curve of the capacitor 10 varies (curve A, B, C, D in Fig. 3, c). As a result, the next thyristor is unlocked, i.e., the amplitude of the rectified voltage is compensated.

If an increase in the amplitude t / in occurs at the moment when the thyristor is open, compensation, respectively, occurs during two half periods, i.e. in the first half-period compensation is partial, and in the second - final.

Subject invention

A stabilized voltage source containing a controlled rectifier, a transistor blocking generator, a relaxation generator made on a transistor with a capacitor connected in parallel with an emitter-collector junction, a load and a feedback resistor, characterized in that, in order to improve performance

stabilization in / time transients, as well as the stabilization factor, one of the load terminals is connected to one of the capacitor terminals of the relaxation generator, the other capacitor lead through

said resistor. feedback and in series. connected with. an additional zener diode is connected to another load terminal, the emitter of the transistor blocking the generator. through a capacitor connected

to the base of the transistor of the relaxation generator.

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ABOUT

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