CS214966B1 - Reversible tyristor rectifier - Google Patents

Description

In the accompanying drawings, an example of a reversible thyristor rectifier according to the invention is shown. 1 shows the circuitry of the power circuits with the ignition units and their common control, and FIG. 2 is an exploded view of one ignition unit.

A pair of antiparallel connected main thyristors 1, 2 are connected to each of the six-phase terminals of the six-phase transformer. The power and control electrodes of these thyristors are connected to ignition units consisting of diodes 3, 8, 13, 17, capacitors 4, 18, resistors 5, 9, 10, 12, 15, 18, auxiliary thyristors 8, 14 and relays 7, 11 connected according to FIG. Second

The rectification of this rectifier is that by switching on the shells of one group relay by the switch 19, six thyristors of common polarity are brought to the conductive state with respect to the common rectifier outlet and the current flows in one direction. By switching on the six relays of the second group by switch 19, the second group of shells of the main thyristors is fed into the conductors and the current flows in the opposite direction. The control electrodes of the main thyristors 1 and 2 receive the control current through the auxiliary thyristors 8 and 14, which are switched by the contacts of the relays 7 and 11. The control current source is therefore the power circuit of the main thyristors.

The reversible thyristor rectifier circuit can be used for a number of phases other than six, even without a mains transformer. Another advantage of this circuit is the possibility of designing all thyristors on a single galvanically coupled heat sink and a simple galvanic isolation of the power and control circuits.

Claims (2)

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 2149BB In the accompanying drawings, an example of a reversing thyristor rectifier according to the invention is illustrated, where in Fig. 1 a circuit diagram of the power circuits with the igniter units and their common control is shown; 2 is an exploded view of a single ignition unit. A pair of antiparallel main thyristors 1, 2 are connected to each of the six outlets of the six-phase transformer. The power and control electrodes of these thyristors are connected to the ignition units, which consist of diodes 3, 8, 13, 17, capacitors 4,18. , resistors 5, 9, 10, 12, 15, 18, auxiliary thyristors 8, 14 and relays 7, 11, respectively. 2. The operation of this rectifier is that by switching on the six relays of one group of switches 19, six thyristors of the same polarity relative to the common outlet of the rectifier are brought into the conductive state and the current flows in one direction. By switching on the six relays of the second group with switch 19, a second group of six main thyristors is fed into the conductivity and the current flows in the opposite direction. The control thyristors 1 and 2 receive control current through auxiliary thyristors 8 and 14, which are coupled by relay contacts 7 and 11. Thus, the control current source is the thyristor power circuit. The mentioned reversing thyristor rectifier can also be used at other times than six, even without a mains transformer. Another not mentioned advantage of this connection is the possibility of placing all thyristors on one galvanically connected cooler and simple galvanic separation of power and control circuits. OBJECTIVE A reversing thyristor rectifier, characterized in that thyristors (1) and (2) are connected to each of the six six-phase transformer terminals, of which the first main thyristor (1) is connected to the terminal by an anode and a second head. cathode thyristor (2) and cathode cathode. the thyristor (1) is connected to the anode of the second head. the thyristors (2) and, together, are connected to a common rectifier outlet along with the other main thyristor twin pairs, with the beacon units connected to all six pairs of main thyristors, consisting of a diode (3) whose anode is connected to a common rectifier lead and cathode is connected to the first condenser terminal (4) and also the first resistor terminal (5), the second condenser terminal (4) is connected to the anode of the first main thyristor (1), the second conductor terminal (5) is connected to the anode the auxiliary pyristor (6), the cathode of which is connected to the terminal (a) of the relay (7j and the control electrode is coupled to the cathode of the diode (8) and the first lead of the resistor (9), whose second terminal is connected to a common rectifier lead and an anode of the diode YNALEZ (8) is connected to the first resistance terminal (10) and terminal (c) of the relay (7), whose terminal (ej is connected to the common rectifier terminal and terminal (d) is connected to the first terminal resistor) u (12), the second terminal of which is connected to the anode current (13) and the terminal (c) of the relay (11), which terminal (d) is connected to the second terminal of the resistance (10) and the terminal (e) is connected to the anode of the first main a thyristor (1) and a first resistor (15) output, the second terminal of which is coupled to a diode cathode (13) and an auxiliary thyristor control electrode (14) whose cathode is coupled to the relay terminal (a) (11) and an indication coupled to the first resistor terminal (1Θ), the second terminal of which is connected to the cathodudiodes (17) and a first condenser terminal (18), the second terminal of which is connected to a common rectifier lead, and the diode anode (17) is connected with the anode of the first main thyristor (1), the control electrode of which is connected to the pin (b) of the relay (7) and the control electrode of the second main thyristor (2) is connected to the terminal (b) of the relay (11). 2