SU1029379A1 - Device for controlling reversive converter - Google Patents

Abstract

A DEVICE FOR CONTROLLING A REVERSIBLE CONVERTER containing a clock generator, the input of which is intended for HQSr. Switching to the power supply converter: network, the output is connected to the counting input of the counter, the output of which is connected to the trigger input, and pulse-phase control units, the outputs of which are intended to be connected to the control electrodes of the thyristors of the converter, in order to improve the accuracy reliability, it is equipped with a current direction adjuster, a time adjuster, and an NAND element, with the trigger outputs being set to the trigger points. current control is combined with the first inputs of pulsed-phase control units, the inputs of the NAND element and the time sensor inputs, the information outputs of which are connected to the installation inputs of the counter, the gate output is connected to the second input of the synchronizer “L pulses” and the second inputs of the pulses phase control, the third in | | DY of which are connected to the output element AND IS NOT. §

Description

Yu

with b:

with

The invention relates to electrical engineering and can be used to control reversing converters and other devices where certain switching times are required.

A device for controlling a reversing transducer is known, comprising two scaling circuits, two master pulse generators, and a mode switch C.

However, in this device, the utilization rate is low, additional measures are required to improve the stability of the time settings, and remote control of the device is not possible.

The closest in technical essence to the proposed is. A device for controlling a reversing converter / containing a clock generator whose output is intended to be connected to the mains, the output is connected to a counter input of the counter whose output is connected to the trigger input, and pulse-phase control blocks whose outputs are intended to be connected to thyristor control electrodes C 2 J converter.

The disadvantages of this device are the difficulty of accurately setting the time and ensuring stability, the impossibility of remote setting the time and mode with electrical signals, the lack of protection against the simultaneous switching on of both thyristor blocks, which reduces the reliability of their operation.

The purpose of the invention is to improve the accuracy and reliability.

The goal is achieved by the device for controlling the reversing converter, which contains a clock generator, whose input is intended for connection to the converter supply network, the output is connected to the counter input of the chip, the output of which is connected to the trigger input, and the pulse-phase control blocks, the outputs of which are intended to be connected to the control electrodes of the thyristors of the converter, is equipped with a current direction setting device, a time setting element and an NAND element, and the trigger outputs through the current direction adjuster is connected to the first inputs of the pulse-phase control units, the inputs of the NAND element and the time setting inputs, the information outputs of which are connected to the installation inputs of the counter; the gate output is connected to the second input of the sync pulse generator and the second inputs of the phase control blocks, the third inputs of which are connected to the output of the item is NOT.

The drawing shows a diagram of a device for controlling a reversible converter.

The device contains a driver

1 sync pulses, counter 2 with setting inputs that allow you to write to the counter Preliminary, information, counting trigger 3 with an additional installation input. Initially, setting device 4 is current direction with setting inputs of the selected direction, setting time setting 5, representing a gate switch. set from outside the code of time settings for the forward and reverse directions of the output current, the element b – AND – NOT, blocks 7 and 8 of the pulse-phase control. The device does not require adjustment and adjustment.

The device works as follows.

Electric signals (the code sets the time settings for the forward and reverse directions of the output current, the selected initial direction of the output current (direct or reverse), the mode of operation (automatic or manual reverse).

In the presence of a reset signal generated by the external devices, the trigger 3 is in a certain state, and the signals at the output of setpoint 4 are determined by the signals at its installation inputs. The output signals of setter 4 prepare setter 5 for writing to the counter 2 the code of the timestamps of the selected level. The installation signal blocks the operation of blocks 7 and 8, counter 2 and driver 1.

In the automatic mode, when the reset signal is reset, the block 7 is turned on, the setpoint generator 5 generates a strobe signal, which writes to the counter

2 codes of a given time setting, Shaper 1 starts operation. Shaper 1 pulses are counted by counter 2 and, when they reach a predetermined number, the signal from the output of counter 2 is shifted to another state trigger3. In this case, the signals at the outputs of the setting device 4 change. This leads to the switching on of the block B (block 7 is turned off) and the setting of the strobe signal by the setting device 5 and writing to the counter 2 of the time setting of the other direction of the output current. The process is repeated. If necessary, there is a pause between the operating modes of the converter, a strobe signal is used, generated by

 1029379

in the unit 5, which blocks If due. either reasons with

blocks 7 and 8 and shaper 1. outputs of the setter of the initial direction. At the beginning of the reversal of the block, the resolving signals are received

Trigger 3 is set, and reverse is implemented to enable both Rocks 7 and 8,

are external time signals at element 6 output

giving device, acting5 a signal that blocks the work of these: blocking device 4.k.

Claims (1)

ί DEVICE FOR CONTROL OF A REVERSE CONVERTER, containing a clock generator, the input of which is intended to be connected to a supply network converter, the output is connected to the counter input of the counter, the output of which is connected to the trigger input, and pulse-phase control units, the outputs of which are designed for connection to thyristor control electrodes Converter, characterized in that, in order to improve accuracy and reliability, it is equipped with e-patch. com direction of the current, the time master and the AND-NOT element, and the trigger outputs through the master. the current controls are connected to the first inputs of the pulse-phase control units, the inputs of the NAND element and the inputs of the time setter, the information outputs of which are connected to the installation inputs of the counter, the strobe output is connected to the second input of the clock generator and the second inputs of the pulse-phase control units, third the inputs of which are connected to the output of the element AND NOT.