SU828411A1 - Device for control of switching apparatus - Google Patents

Description

The invention relates to electrical engineering, in particular, to electronic switch control systems used in electron-beam process plants.

Known devices are regulated: 1 electron electron gun with the help of an electron} of the 1st lamp, which contains current sensing voltage, reference sources, comparison units and performers; 1 element.

A disadvantage of the known control device is that the method used to stabilize the current i.cpOTXGro behind the amps as protection against KopOTKJix circuits is suitable only for low-power installations (a few kW), as in the short-circuit lamp ;; power source pitash. In addition, the short-circuit arc current 3 my1, its installation (tens and hundreds of kW) cannot be extinguished by its stabilization, this requires a complete current shutdown, i.e. closing the lamp. Therefore, lime devices have insufficient reliability and are not 1: -: l: 1 .m for high-power installations.

It is known a device 2, included in an iitani electronic circuit, which contains current and voltage sensors, threshold n switching cells, thyristors, and dual-operation thyristors. In the event of a short circuit, a signal is generated in the electronic trigger.

on locking the lamp. The device has an automatic reclosing unit (AR), consisting of the time of the master KS-1; a dynistor that performs the relay of a threshold element and a key. Block

The ALV turns on the lamps again) at a predetermined time interval after a short time in Puikka.

The disadvantage of this device is the absence of a limitation to recruit: the automatic recloser block, which, with a stable short circuit, causes an overload of all elements of the power supply system and deterioration of the characteristics; the bar around the device.

The aim of the invention is to simplify:; e and increase the reliability of the device.

(The goal is achieved by the fact that the device for controlling the electronic switchboard included in the power supply circuit of the electronic igniter is equipped with a tip. 1 pulses, consisting of consequently connected time specifying the RCi: eno4K i, the threshold element and the executive element, moreover, the input is the time specifying the RC connection of the accumulator eo-edien with the trigger output and the input of the l-iter conditioner, and the output of the actuating element is connected to another trigger input.

FIG. 1 shows a block diagram of a device for controlling an electromine switch; in fig. 2 is a timing diagram of the operation of the electronic switch control device.

An eder to 1t source / l-iti device with a series-connected current sensor 1, an electron beam detector 5, in parallel with which a voltage sensor 4 is connected, and an electronic commentator 5, made in the form of an electron beam valve, to the control electrode of which through the terminal amplifier 6 control device 7 is connected, consisting of a threshold element S, switching trigger 9 with inputs R & S, outputs I and Q amplifier 10, unit // automatic restarting, Hiero connection, sequentially setting time RC chain 12, pulse capacitance 13 of the capacitance, the norm element 14, the accumulator 15 and the pulses, consisting of RC zaduchadi 6 chain sequentially connected, the threshold 77 n Executive 18 elements.

The installation works as follows.

A signal about the breakdown in the electron gun, from current sensors 2 and voltage 4 is applied to the corresponding input of element 8, and from it the input R of trigger R 9, which is triggered through amplifier 10, sends an elastic signal U to amplifier 6 and locks the valve 5. The signal from the P output of the flip-flop 9 triggers the timing of the RC-chain 12, and 16, the latter having a long time constant. Upon reaching the voltage at the output of the chain 12 of the operation of the ba of element 14, the latter outputs a lateral-shifted LB cha input signal 5 of the trigger 9, which translates into the initial state. The duration of the signal U is determined by the discharge time of the capacitive chain 12 through the discharge chain 13 triggered by the output of the Q output of the trigger 9. Thus, the electronic switch is automatically restarted after a time determined by the charging time of the capacitance of the chain 12, which can regulate within the required limits (10--3 + 10 s).

The drive 15 operates in principle similarly. The triggering moment of the element // (C / d signal) depends on the time of automatic re-activation of the frequency and the frequency of occurrence of a breakdown in the electron gun 3. After the element 17 triggers, the signal through element 18 is applied to the input R of trigger 9 and blocks the block // . Upon termination and

The breakdown of the eMiKOiCTb chain 16 is discharged from a given time constant: which can be controlled by the value, the drive 15 is brought to a state close to the initial state si. Thus, if there are breakdowns in the station 3, even if frequent, but separated in time, block 11 will operate without interference by the operator. li at the same time, a stable short-circuit switch after a specified number of pulses, the automatic reclosing device will operate.

The operation diagrams of the control unit of the electronic switch illustrate the relationship between the character and frequency of the technical frequency. in the spot and the logic of the control circuit. On the chart

(a) rectangular pulses obtained from the pn probe x trigger in the gun;

and - it goes to the amplifier 10, after amplification it goes to the amplifier 6, the II output signal from the nj last locks the valve 5 (ELV).

At the same time, the signal Lj is applied to the wake-up chains 12 and / 6.

and - the signal received from the time of the master circuit (12): i - Time interval of time before the signal is applied to the AR;

and - the signal from element 14 arriving at the trigger point input P; LV is the signal received after the time of the driving chain 16 of the accumulator (75);

Le - sigal, incoming; : from the Q output of the trigger 9 to the discharge of the dzju chain (13) n from the element 18 to the R input of the trigger 9.

FIG. The dotted line shows the trigger levels of the threshold devices. The positive effect from the use of this invention is due to the increased reliability of the electronic switch due to the automatic registration of the nature and frequency of Q. 3. (short circuit) and the corresponding selection of the ARC mode.

Claims (2)

1. US patent number 3400207, cl. 13-31, 1968. 2. US patent N "3546606, cl. 328-267, 1970.