SU758522A1 - Thyristor-based distributor - Google Patents

Description

(54) THIRIST DISTRIBUTOR

one

The invention relates to a pulse technique and can be used in multi-position discrete regulation.

Known pulse counters on thyristors, containing cascades of series-connected load resistor, thyristor and diode, communication elements of series-connected diode and resistor, connected between the anode and -cathode of thyristors of adjacent cascades and switching capacitors, one terminal connected to the thyristor anodes, and others their findings are interconnected 1.

A disadvantage of the known pulse counter on thyristors is the lack of possibility of reverse movement.

The aim of the invention is to enhance the functionality of the device by providing reverse movement.

The goal is achieved by the fact that in the distributor on thyristors containing cascades of series-connected load resistor, thyristor and diode, communication elements of series-connected resistor and diode connected between the anode and cathode of the thyristors of adjacent cascades are inserted a two-position key associated with a two-channel a source of triggering pulses, with the inputs of the keys on the positive side of the power source combined and connected to a common point

5 connections of the switching capacitors, and outputs through the isolating diodes to the minus of the power source and additionally introduced the connection between the anode of the isolating diode of the newly introduced key and the cathode of the interstage connection element.

10 The drawing shows a circuit diagram of the distributor on the thyristors.

The distributor contains three identical stages. A separate cascade is a series-connected 15-load resistor I, a single-operation thyristor 2, and a diode 3. A resistor 4 is connected between the control e, the electrode of the thyristor 2, and the total thickness of the power source. Each cascade has two symmetric intercascade circuits; direct - with the subsequent cascade and reverse - with the previous cascade. The direct connection between the anode of the thyristor 2 and the cathode of the subsequent thyristor is made with a chain of series-connected resistor 5 and diode 6. The reverse connection between the anode of the thyristor 2 and the cathode of the previous thyristor is made with a chain of series-connected resistor 7 and diode 8. K The points of connection of these elements are connected to the switching diodes 9 and 10, connected to two input keys, respectively, of the forward AND and reverse 12 directions, which are connected to a two-channel source of triggering pulses 13. O The main element of both types of intercascade circuits is a capacitor 14, which is connected between the anode of thyristor 2 and the common connection point of keys 11 and 12, which is connected via a resistor 15 to a power source. Keys 11 and 12 are connected to a common power source with diodes 16 and 17, respectively.

Consider the operation of the circuit, setting open the second stage. The capacitor 14 is charged through a resistor 15 to the voltage of the power source. In order to carry out a direct movement, the triggering pulse must cause the closure of the key 11. The voltage on the capacitor 14 is applied through the key 11 and the diode 16 to the thyristor 2, causing it to lock. The capacitor 14 begins to discharge in two circuits: switch-diode 16-resistor 18-transition control electrode-cathode of the thyristor 19-diode 6-resistor 5; Key 11 diode 9-resistor 7.

As a result of current passing through the first circuit, the thyristor 19 is unlocked. In the second circuit, the switching diode 9 shunts the circuit passing through the control electrode-cathode transition of the thyristor 20 and the similar circuit (1). In order to carry out reverse movement, the triggering pulse must cause the closure of key 12. In this case, the circuit, similar to circuit (1), passes through the control electrode-cathode of the thyristor 20, and the circuit, similar to circuit (2), passes through the switching diode 10. As a result the thyristor is unlocked

20, and, therefore, the cascade states shift to the left.

Resistors 5 and 7, in addition to the noted function of providing switching (bypassing) action of diodes 9, 10, are designed to eliminate the parasitic connection between the opening thyristor and the next (given direction). For this purpose, it is necessary that the anode current of the opening thyristor causes compensation of the negative potential at its cathode from the action of a circuit of type (1), i.e. simplified Rj Rr Ri.

Claims (1)

Invention Formula The distributor on the thyristors, containing cascades connected in parallel between the supply wires, each of which consists of a series-connected load resistor, a thyristor and a diode, communication elements of a series-connected resistor and a diode, connected between the anode and cathode of the thyristors of adjacent stages, and switching capacitors, alone from the conclusions of which are connected to the anodes of the corresponding thyristors, and their other conclusions are interconnected, characterized in that, in order to expand the functional possibilities by providing reverse movement, a two-position key connected to a two-channel source of triggering pulses is inserted into it, the inputs of the keys on the plus side of the power supply are combined and connected to the common connection point of the switching capacitors, and through the isolating diodes to the source minus power, and the outputs of the keys and the cathodes of the diodes interstage communication elements are connected by means of diodes. Sources of information taken into account in the examination 1. USSR author's certificate 0 No. 465739, cl. H 03 K 23/08, 1975 (prototype).