SU1193792A1 - Pulse-phase device for thyristor converter control - Google Patents

Description

1 The invention relates to a pulse technique and is intended for the execution of pulse-phase devices of a thyristor converter control system of variable-voltage direct-current and alternating-current drives. The purpose of the invention is to improve the accuracy of conversion while improving noise immunity. . . Figure 1 presents the block diagram of the device; figure 2 - timing charts of the device. The pulse-phase thyristor converter control device contains a filter 1 with an input for connecting to the source 2 a synchronizing voltage connected in series with the first driver 3 pulses, a delay unit 4 with two control inputs 5 and 6, two elements AND 7 and 8, output the first of which is connected to the inputs of the first 9 and second 10 amplifiers, and the output of the second to the inputs of the third 11 and. the fourth 12 amplifiers, the outputs of the first 9, second 10 third 11 and fourth 12 amplifiers are connected to the corresponding output buses 13-16 of the device, the second inputs of the first 9 and second 10 amplifiers and the third 11 and fourth 12 amplifiers are connected respectively to the second 17 and third 18 input bushes, setter 19 for the duration of a pulse pulse, regulator 20 of the reference voltage, setter 21 for the amplitude of the reference voltage, shaper 22 of the discharge pulses and the second driver 23 of the control pulses, the first input of the shaper 22 pulses of the connection It is connected to the shaper of 3 pulses, the second input is connected to the setting device 19 of the pulse-to-reset duration, and the first and second outputs are connected to the first inputs of logic elements I 7 and 8, the third output is connected to the nepBbiM input of block 4, the second and third inputs are connected with input codes, respectively, of the reference voltage amplitude setting device 21 and reference voltage regulator 20, the fifth input of the delay unit 4 is connected to the first synchronization bus 24, the output of the pulse former 23 is connected to the second inputs of the first 7 and second 8, respectively, and third and the inputs of which are connected to the second 25 and third 26 tires sinhronizasch1i and second inputs - the fourth 27 and fifth 28 synchronization tires at ztom output unit 4 is connected to a control pulse shaper 23. The device works as follows. The synchronization voltage is fed to the input of the filter (Fig. 2o) and then to the input of the first driver 3 pulses. From the output of the latter, the signal (Fig. 25) is fed to the input of the pulse generator 22, the first, second and third outputs of which generate rectangular pulses (Fig. 2d, d, e), and the delay 4 block is prepared at the second and third output to work. The setting device 19 of the duration of the reset pulses is essentially (Fig. 2c) a driver of the duration of the pulses forming a linearly varying voltage of the delay unit 4. The regulator 20 of the reference voltage stabilizes the linearly varying voltage (Fig. 2), and the setting unit 21 of the amplitude of the reference voltage sets the amplitude of the reference voltage of the unit 4 of the controlled delay. Depending on the magnitude of the control signal, the delay time changes (Fig. 2 p of the delay unit 4. From the output of the 4 delay block, the signal goes to the third pulse generator 23 and then (Fig. 2i) to logic gates And 7 and 8, where the synchronization pulses go from shaper 22, from busbars 25, 26 and bushes 27, 28 channels working together with elements I and other devices operating in parallel, from the first shaper 3. pulses are separated according to their signals. four pairwise connected amplifier 9-12, equipped with buses 17 and 18 for connecting barring signals. If the ban signal has the form shown in fig. 2m; then the signals shown in (fig. 2n, o) appear at the output.

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Claims (1)

PULSE-PHASE THYRISTOR CONVERTER CONTROL DEVICE, containing a filter with an input for connecting to a synchronizing voltage source, connected in series with a pulse shaper, a controlled delay unit, two And elements, the output of the first of which is connected to the first inputs of the first and second amplifiers, the output of the second element And connected to the first inputs of the third and fourth amplifiers, the outputs of the first, second, third and fourth amplifiers are connected to the corresponding output buses of the device, w The first inputs of the first and second amplifiers and the third and fourth amplifiers are connected to the second and third input buses, respectively, distinguished by the fact that, in order to increase the conversion accuracy while increasing the noise immunity, a reset pulse width adjuster, a regulator are introduced into it reference voltage, reference voltage amplitude adjuster, reset pulse shaper, control pulse shaper, the first input of the reset pulse shaper is connected to the output of the pulse shaper, sec the first input is connected to the reset pulse width adjuster, the first and second outputs of the reset pulse shaper are connected to the first inputs of AND elements, the third output is connected to the first input of the controlled delay unit, the second and third inputs of which are connected to the outputs of the reference voltage amplitude regulator and reference regulator voltage, the fifth input of the controlled delay unit is connected to the first synchronization bus, the sixth and seventh inputs are control inputs, the output of the control pulse shaper is connected with the second inputs of AND elements, the third inputs of which are connected to the second and third synchronization buses, the second input signals of the And elements are connected to the fourth and fifth synchronization buses, and the output of the controlled delay unit is connected to the control pulse generator. "> S.U. L193792 1 193792