SU1317611A1 - Multichannel device for phase control of thyristor converter - Google Patents

Abstract

The invention relates to electrical engineering and can be used in control devices, etc.,. The aim of the invention is to expand its functionality. The elements 21 16 select the control pulses of the thyristors-1B according to the synchronization signals 5 received from the line filters 7. When there is a high level of the operating mode signal at the first inputs of the elements 2 and 20, the synchronization pulses from the outputs of the drivers 8 pass to the inputs of the elements 2ISH1 21 and further to the amplifiers-formers 17, which ensures the operation of the converter in the mode of a symmetrically controlled circuit with double switching of the thyristors during a cycle, i.e. zero circuit for rectifier} current, 1 sludge. 1C

Description

113

The invention relates to electrical technology J, in particular, to a multichannel 1m phase switch thyristor m-5 devices and can be used, for example, in traction exclusion systems: -:: synchronous diesel generator generators.

The purpose of the invention is to expand the functionality of the converter by organizing a 1-loop contour in the power circuit for a rectifier section; press-converting the gel due to exclusion from the SCB;

The drawing shows the structure of the SCB of the device for phase control of the thyristor converter.

The device contains a three-time transformer with the first 1 and the second 2 groups of secondary windings, diode, td, 1 3. resistors 4-6; network fltLTbTpbi 7 synchronization gadgets (fs) devices 8 synchronization pulses, the first 9 and second 10 ZShGK elements, II and second 2 generators, sawdust voltage, the first 13 and second 14 elements compared, element 2IL- Н 155 six elements 2И 1п and six amplifiers-formers G impulse:, - ow control thyristorum ,,

Three-phase transformer 1, 2, diodes Bj resistors 4-6 ,, network filters 7, drivers 8 sync.) Onions and ZILI elements form a synchronization unit 18, distribute. 19 pulses are formed by elec. 2I 16, 2I 20 and 2IL 21.

Circuits from the secondary pitch: diode (5v 3j resistors 4 and resistor 5 for one group and resistor 6 for friendsEt group of windings composition, l: are e; - one elements of the comparison. In circuit 1: each on the resistor 4 across It appears that the voltage at the moments of equality of phase voltages for the period of displacement when the magnitude of the voltage in this phase is greater than the voltage of the other. The voltages generated in resistivity 4. coincide with the interbalance of the operation of the power thyristors of the converter,.

Thus, the circuit for switching on the secondary windings with the circuits from diode 3 and resistors 4-6 simultaneously with the generation of the synchronization signals is carried out by their distribution over time j corresponding to the periods of thyristors operation in

Device;: cnH phase control thyristor transducer ragtgget as follows.

When a device t - ;, is supplied to the input, the phase voltage on the secondary windings of the first 1 and second 2 g, upp, due to the 11th, negative phase, creates a voltage in the terminal phase with respect to each other. On the first three resistors 4, connected to the first I pyrine secondary I-10TOK 1, the synchronization voltage of one ELECTRICALLY voltage network voltage is formed; on the remaining three resistors, x 4 - the synchronization voltage of the opposite polarity of the synchronization voltage, formed on the resistors 4j is supplied iir; Line filters 7 channels of synchronization in which from the input signal, the rectangular pulses of cm and of signals are normalized, is signaled by impedance: strong interference, created in the thyristor network.

From the output of the filter, s 7 signal; synchronization is applied to synchronization impregnator drivers, in which Fx1p: g-a-; the cortex of the impulses is corresponding to 1 1; tsm vu100; ni, the start of each input pulse, C 1 output of the first three forg-givers 8, the synchronization signals are sent to the first T ZILI 9, from B1; the course of the second three shapers are 8 sig. element ZI.GGK 10.

The output of the first element of the ZILI 9 forg is {the total signal from the first three drivers 8 is output, the output of the BTC ijoro of the ZIIH element 10 is the total signal from the second three drivers 8. The signals from the outputs of the ZILI elements 9 and 10 are fed to the generators AND and 12, respectively april, the bride and their outlets to the first elements 13 and 14 of the comparison On the BTOpbse Bxopjji of the comparison elements 13 and 14, a control voltage is applied. On the comparison elements 13 and 14, the output voltage of the 1st voltage generators 1 I and 12 of the sawtooth voltage is compared with the control voltage from the external unit, B the moments of equality of these voltages at the outputs of the matching elements 13 and 14 are formed ig pulses 5 which are fed to the input of the element 2 41 l-HE 13 5 from the output of which the total signal e is the main control pulses spaced 60 degrees apart from each other, are fed to the second inputs of the six elements, the distributor 2 and 16 pulses on the second inputs of these logically elements synchronized signals are supplied, tion of network synchronization filt.rov 7.

On elements 2 and 16, the thyristor control pulses are selected from the total sum of the signals in accordance with the synchronization signals from the line filters 7. From the output of elements 2 and 16, the resulting pair of main control signals is fed through the first input of the element 15 2 OR to the amplifiers 17 output thyristor control pulses.

In the presence of a high level (+ 5V) of the operating mode signal at the first inputs of elements 2 and 20, additional control signals, which are synchronization pulses at the outputs of the corresponding shaper 8, fed to the second inputs of elements 2 and 20, pass to the second inputs elements 2ILI 21 and further to the amplifiers-shapers 17 output pulses of thyristor control, which ensures the operation of the AOR converter in the mode of a symmetrically controlled circuit with double switching of the thyristors during the same cycle, i.e. with zero circuit for rectified current. In the presence of a low level (О В) - the signal of the converter operating mode works without a zero circuit and operation in the inverter mode is possible. The proposed device, in comparison with the prototype, simplifies the power circuit of the converter, and its use in the excitation system, , for a locomotive traction synchronous generator, it also simplifies the field driving circuit and, as a result, leads to the reduction of the devices of the power excitation circuit,

Claims (1)

A formula was invented and a Multichannel device for phase control of a thyristor transducer. A converter containing a three-phase transformer with two three-phase secondary windings with opposite phasing, each of which is formed into a star and connected to diodes and resistors connected in series, and the common points of the terminals and resistors are connected to the synch pulses of each of the the two elements are connected to the outputs of three corresponding timers for the chronization impulses associated with the corresponding three-phase secondary circuits, the outputs of the SCRI elements through the corresponding Therefore, the sawtooth generator, the first input of the element, is connected to the inputs of the I1P-1 element, the output of which is connected to the first inputs of the six main elements, the second inputs of which are connected to the moves — the corresponding network footers — the amplifiers — form the outputs that are intended for switching to the control of the riser electrodes, the primary winding of the three transformer is designed to connect to the mains supply, so that, in order to expand the functional capabilities by organizing The contour zero in the converter when rectified is in the rectifier mode, it is equipped with Optional additional elements 2I, six elements 21-W and the first inputs of additional bodies bta of elements 2И are combined and assigned to connect the zero-contour setting to the source, the new inputs are connected with the outputs from the corresponding formers of synchronization impulses, and the outputs from the first inputs of the corresponding 2ILI elements, the second inputs of which are connected to the outputs of the corresponding bases of the 2I elements, and the outputs from the input of the amplifier shapers. Compiled by S. Luzanov Dz: |; ° R. A. OgarTehred M. Khodanych Corrector L. Patay Order 2431 / 32Tirac 660Subscription VNIIPI USSR State Committee Inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. d. (c / 5 Production and printing company, Uzhgorod, st. Project, 4 A distributor containing a three-phase transformer with two three-phase secondary windings with opposite phasing, each of which is connected to a star and connected to the corresponding series-connected diodes and resistors, common points of the diodes and resistors are connected through corresponding network filters with synchronization pulse shaper inputs of each of two elements ZILIs are connected to the outputs of three corresponding sync pulse formers connected to the corresponding three-phase secondary circuits. windings, the outputs of the LCID through the corresponding series-connected sawtooth generator, the first input of the element, the comparison is connected to the inputs of the element I1P-1-HE, the output of which is connected to the first inputs of the six main elements 2I, the second inputs of which are connected to the outputs network filters, the simplicity of the shaper amplifiers, the outputs of which are intended to be connected to the control electrodes of the thyristors, the primary winding of the three-phase transformer is intended to be connected to the power supply network, so that, in order to extend the functionality by organizing the zero circuit in the converter when it is operating in the rectifying mode, it is equipped with F6 additional elements 2I, six elements 21-SHI , the first inputs of the additional elements btaix elements 2I are combined and intended to connect the zero loop reference to the signal source, the second inputs are connected to the outputs of the corresponding synchronization pulse driver, and the outputs are connected to the first inputs of the 2or s, the second inputs of which are connected to the outputs of the respective basic elements 2i, and outputs - to the inputs shaping amplifiers.