SU1066029A1 - Device for rectifier unit control - Google Patents

Abstract

A DEVICE FOR CONTROLLING A STRAINER, containing a synchronizer, whose input is intended to connect to the power supply phase, the output through the phase-shifting unit is connected to a distributor platoon, whose outputs are intended to be connected to the output blocks of the device, characterized in that, in order to improve reliability, it is equipped generator of clock pulses, and the distributor is made on R5-triggers and (n-1j elements AND (n is the number of channels of the distributor), and S is the input of the first RS flip-flop being the input of the distributor, One of the RS triggers are the outputs of the j distributor, the output of each RS -Tpjirrepa, except the last one, is connected to the first input of the corresponding I element, the output of which is connected to the S input of the next RS trigger, R input of each RS trigger, is connected to the output (L C of the following RS trigger, the second inputs of the elements I are connected to the output of the clock generator, the permissions of which are connected to the output of the last 8-trigger pac-G limiter.

Description

The invention relates to converter technology and is intended to control multiphase pickups that can be used in various industries.

A single-channel device for controlling a rectifier is known, comprising a synchronization unit connected in series, a phase-shifting unit, a pulse distributor and output units tn.

The disadvantage of this device is its complexity due to the difficulty of synchronization with the network and the implementation of the phase shift in a wide range of variation of the control angle.

The closest to the proposed is a device for controlling a rectifier containing a synchronizer, the input of which is intended to be connected to the phase of the mains supply, the output through phase shifting of the unit is connected to the input of the distributor, the outputs of which are intended to connect to the output blocks of the device 21.

The disadvantage of the known device is. is its complexity and the associated reduced reliability. The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that the device for controlling the rectifier is equipped with a clock pulse generator, and the distributor is made on RS triggers and (n-1) AND elements (o is the number of distributor channels), with the .5 input of the first RS Trigger being in X . the distributor's house, the outputs of the RS flip-flops are the outputs of the distributor, the output of each RS trigger, except the last, is connected to the first input of the corresponding AND element whose output is connected to the S input of the next RS trigger, R is the output of each RS trigger, connected to the output of the next RS trigger, the second inputs of the elements And is connected to the output of the clock generator, allowing the 1st input of which is connected to the code of the last RS trigger trigger. .

Figure 1 shows the functional diagram of the device; figure 2 - temporary diagmyma, on-his work.

The device for controlling the rectifier contains a synchronizer 1, a phase-shifting unit 2, a distributor 3, a generator A of sync pulses with a frequency mf with an input of generation. Distributor 3 contains RS-triggers 5-7, elements and 8 and 9. 5 The device operates as follows.

The synchronizer 1 generates a sequence of pulses and (Fig. 2 with a frequency equal to the frequency of the feeding network. The angle of control is adjusted

unit 2 and can vary from 0 to 2f,. those. until the next pulse U appears. The pulse from the output of block 2 is fed to the input

5 of the distributor 3 (the input of the S-trigger 5, the output of which is an L / g signal, which is amplified and fed to the power valve of the corresponding phase of the rectifier. At the same time, the same signal goes to the P-1 trigger input 7 and to the element input 8. The signal from the output of the trigger 7 controls the start of generation of the generator 4. After the arrival of the pulse from the output of the generator 4 to the inputs of the element 8, a signal arrives at the S-input of the trigger 6, at the output of which a control pulse appears Ug, simultaneously arriving at the R-input tr iger 5 and to the input element 9 / and

the time of arrival of the next pulse generator 4 at the output of the element 9. the forg / i pulse is applied to the S input of the trigger 7. A third control pulse, the third 1/7 pulse, simultaneously arrives at the S input of the trigger 6 and the razor input; it doesn’t generate the generator 4 or stop its operation.

0 With the arrival of the next pulse from the synchronizer output, the cycle repeats.

The proposed device differs from the known simplicity and high

5 reliability while maintaining the high symmetry of the control pulses inherent in single-device devices for controlling rectifiers, speed and a wide range of adjustment of the ignition angle.

The asymmetry of the control pulses through the channels determines g only by the instability of the frequency of the supply network and is about 0.72, 5 which is 4 times less than that of the multichannel control systems, and only,. slightly exceeds the asymmetry of single-channel systems.

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Claims (1)

A RECTIFIER CONTROL DEVICE, comprising a synchronizer, the input of which is intended to be connected to the phase of the supply network, the output through the phase-shifting unit is connected to the input of the distributor _{f, the} outputs of which are intended to be connected to the output of the device, characterized in that, in order to increase reliability, it equipped with a clock generator, and the distributor is made on RS-triggers and elements And (And is the number of channels of the distributor), and the S-input of the first PS-trigger is the input of the distributor, the outputs of the RS-triggers are the outputs of the distributor ^ the output of each RS-trigger, except the last one, is connected to the first input of the corresponding element And, the output of which is connected to the S-input of the next RS-flip-flop, the R-input of each RS-flip-flop is connected to the output of the next RS-flip-flop, the second inputs of the elements And are connected to the output of the clock generator, the permitting input of which is connected to the output of the last BS-flip-flop. FIG 1> SU ,,. 1066029>