Two-thyristor modular block for welding machines
  • Two-thyristor modular block for welding machines

Photos are for informational purposes only. View product specification

please use latin characters

Manufacturer: DACPOL SERVICE

Two-thyristor modular block for welding machines

Two-thyristor modular block for welding machines


In resistance welding machines, replacement of the ignitron contactors with thyristor contactors is performed. If we consider electrical connections, the thyristor contactor circuit (a suitable module block) only requires a circuit for matching the ignitron triggering pulses to the level of pulses necessary for triggering the thyristors, so there are no technical contraindications here. The appropriate matching circuit is shown in Fig. 3. The output of Z1 circuit should be connected to the tip removed from the ignitron starter, while B1 and K1 points should be connected to the gate and cathode of T1 thyristors. Mechanical mounting of thyristor contactor does not cause any changes in construction of the welding machine. The existing water cooling system of the ignitrons is also used. To ensure proper operation of the module block in the thyristor contactor system in the welder, it is necessary to maintain the existing water block in the ignitron system.



Technical data

Modular block type Range VDRM
[V]
ITSM
[A]
I2t
[A2s]
IGT
[mA]
A2Q6W - 125 - ... 1200-2200 3000 45000 150
A2Q6W - 200 - ... 1200-2200 3600 65000  
A2Q6W - 300 - ... 1200-1600 5000 125000  
A2Q7W - 350 - ... 1200-2200 6300 200000 300
A2Q7W - 450 - ... 1200-2200 7600 290000  
A2Q7W - 550 - ... 1200-1800 9100 290000  


Fig. 1. Table of connections of welding modules - block type A2Q.W


Fig. 2. Two-thyristor block for welding machines
„6" - thyristor thickness approx. 15 mm 
„7" - thyristor thickness approx. 26 mm



Fig. 3. The principle of using a two-thyristor modular block as a replacement for an ignitor contactor in a welding machine

a) ignitron system,
b) thyristor contactor system,
c) matching system.




Fig. 4. Internal diagram of the matching circuit

Send an inquiry

Are you interested in this product? Do you need additional information or individual pricing?

Contact us

ASK FOR THE PRODUCT close
Message sent successfully.
ASK FOR THE PRODUCT close
Browse

Add to Wishlist

You must be logged in

Two-thyristor modular block for welding machines


In resistance welding machines, replacement of the ignitron contactors with thyristor contactors is performed. If we consider electrical connections, the thyristor contactor circuit (a suitable module block) only requires a circuit for matching the ignitron triggering pulses to the level of pulses necessary for triggering the thyristors, so there are no technical contraindications here. The appropriate matching circuit is shown in Fig. 3. The output of Z1 circuit should be connected to the tip removed from the ignitron starter, while B1 and K1 points should be connected to the gate and cathode of T1 thyristors. Mechanical mounting of thyristor contactor does not cause any changes in construction of the welding machine. The existing water cooling system of the ignitrons is also used. To ensure proper operation of the module block in the thyristor contactor system in the welder, it is necessary to maintain the existing water block in the ignitron system.



Technical data

Modular block type Range VDRM
[V]
ITSM
[A]
I2t
[A2s]
IGT
[mA]
A2Q6W - 125 - ... 1200-2200 3000 45000 150
A2Q6W - 200 - ... 1200-2200 3600 65000  
A2Q6W - 300 - ... 1200-1600 5000 125000  
A2Q7W - 350 - ... 1200-2200 6300 200000 300
A2Q7W - 450 - ... 1200-2200 7600 290000  
A2Q7W - 550 - ... 1200-1800 9100 290000  


Fig. 1. Table of connections of welding modules - block type A2Q.W


Fig. 2. Two-thyristor block for welding machines
„6" - thyristor thickness approx. 15 mm 
„7" - thyristor thickness approx. 26 mm



Fig. 3. The principle of using a two-thyristor modular block as a replacement for an ignitor contactor in a welding machine

a) ignitron system,
b) thyristor contactor system,
c) matching system.




Fig. 4. Internal diagram of the matching circuit