SU693527A1 - Device for phase control of power-diode converter - Google Patents

Description

(54) DEVICE FOR THE PHASE CONTROL OF A VENTILATION BY THE PREO THE DEVELOPER

The invention relates to electrical engineering, in particular, to devices for pulsed-phase control of a BtflAi bridge of static and transducers on control valves, and can be used in various electrical installations, for example, in powerful stabilized power sources based on DC converter, in electric direct current. Devices for phase control of a valve converter are known, containing a sawtooth generator, a switch made on a transistor which is controlled by a mains voltage, phased out with a moment of natural voltage of the converter valve, so that the start of the sweep coincides with this moment 1. However, these devices do not provide single-channel formation of antiphase pulses (starting and resetting the sawtooth generator each half of the synchronizing voltage), t As a sawtooth generator, it has a finite turn-on time and does not allow simultaneous resetting and starting at the moment of transition, and synchronizing voltage across zero. The closest in technical essence to the proposed is a device containing an output pulse generator, a synchronizer, the output of which is connected to the control circuit of the reset key of the integrator, the output of which is connected to one short circuit of the xcparator, to the other input of which the control voltage source 2 is connected. This is the mouth The device provides for the formation of shchutivofaennyh control pulses, the launch of the sawtooth generator at time points corresponding to zero crossings of synchronizing voltage, and as a result of this, low asymmetry of the output pulses. The disadvantage of it is the low speed in dynamic modes, due to the impossibility of generating additional pulses with an abrupt change in control voltage.

The aim of the invention is to increase the speed of the device in dingly modes.

This is achieved by the fact that the proposed device for the phase control of the vent valve converts the samples, which synchronizes the synchronous signal, of which the PSD is: sl1tochk to ;; ENOKH, .ugger :: pgdkslyu & n to control the year of the year; zhhsd nptegrats ;;:.

It is connected to the KS zzgodsg -: gkp5-rotoryrka friend gstsrsgs ps -. the keys of the control source gcgppa-pa comparator output is connected to the FS-rknrovatelk control 1SHOSH1-1X pCi pulses: aS jcBHO additional polarizer; and ksto yyko pokhok whom HanpH ASii: iK f podklochenkk. To the short-circuit of the SC is an additional comparator, which is the entry of which is guided to aj

the integrator, and the code - but the Erot-gu input of the RS-flip-flop ..

FIG. 1 is a schematic of the proposed device for the phase control of a vector converter; in fig ". 2 - time diagrams of his work.

The device for phase control of valve converters includes a synchronizer 1 connected to ONE / BEF DfiOM KZ-Trigger 2 to

To the other input of which podchel ache1-5 the output of the comparator 3 is connected. To sa5in from the inputs of the comparator 3 the constant voltage () f is bogged down and the other s-iodine compound1-2 p. ir1 egrasra 4 „

and Bhr of the ingragrator 4 cosgungg stable current Eoo Vshgsy KZ-trigger 2 tt connected to the control nenjj y-l: U1r. Reset 5 of integrator 4 from Vkgod i- jrer ™ of rator 4 is connected to the input of jcobsnapa-Tops 6f to another code of which the control is interlocking; : (yiw). The output of the comparator b podklshchen to the entrance of the forge nrovatel in-nodnkk kg.-gschglsov

The device works on the prompt about ™ once.

In the initial position, the security of eeeha on. There is no synchronizer 1 at the input; there are no micros at its output. CG-trigger 2 finds with a steady state corresponding to the open state of reset key 5 of integrator 4, and the output of integrator 4 p of comparators 3 and 6 and the driver of output pulses 7 are zero. There are no impulses at the device output. When a supply voltage is applied to the input of the synchronizer 1 (Fig. 2a), synchronizing pulses are formed at the output of the output of the network when the network voltage passes through zero (Fig. 26). The frequency of these pulses is equal to twice the frequency of the mains voltage. The first output im11gls synchronizer 1 switches

RS trigger 2 (Fig. 2d), which leads to the opening of the reset key 5 of the integrator 4. A sawtooth voltage is formed at the output of the integrator 4 (Fig. 2c). At the moment of time corresponding to the instantaneous values of the output voltage of the integrated circuit 4 of the mountain 4 and the control voltage, and h,: G: —signal 6 switch the current (FIG, 2y) and On the output Shaper of the output a-shult -.sov 7 for- yurugots ornHDaiortjfe pulses (Figo 2g) At time J, the appropriate paseHCTEy -1GNOvennyh output voltage values ke th integrator 4 and Kenny const voltage-comparator 3 g additional le aklyuchaets (FIGO 2r) that vyzyzget switched trigger 2 n, s EGC key Sledge reset 5 integrator 4 and its reset and return the comparator 3 to the original companion

The amplitude of the voltage selected by the paiOT c. according to Hei i;

 MQkc-o

and

const SC)

Where

- maximum adjustment angle;

- Zo bypass current-gtktegratora 4;

C is the smoothness of the integrator co-sensor 4.

The 3 i / jOfwffiHTH frequencies corresponding to the following transitions of the supply voltage through the null process in the device are repeated. At the output of the device, pulses are formed, the phase shift of which is relative to; 4 the transition voltage of the network through zero is determined by the amplitude of the control voltage, At abruptly. Fig. 1 of the FP drive carries out the generation of an additional pulse, the phase of which corresponds to the HOEONiy value of the control voltage Uy. When controlling a multiphase converter, the number of devices (FIG. 1) is equal to the number of phases of the converter.

If the device is used to control the converter on the triacs, the pulses from the driver 7 output pulses go directly to the triacs of the corresponding Phases. If the device is used to control the converter on the thyristors, the output pulses from the imaging unit 7 are sent to the pulse distributor, where they are distributed along the thyristors, by phase and phase.

Claims (1)

1. Pisarev. “L. to Detkkk, UpryElenkg tkrg.stor-shp-zgg transform. Telkml K., E; Ergn 1975 .. So57. 2nd LETORST-SS: the USSR headset for internal security No. 2434919/07, GlS, .., “02 F, 1976s