Hello
I have this problem as mentioned in the subject, which happens when I connect the transformer to a " 3-phase full wave controlled bridge rectifier ".
I have a fully controlled bridge rectifier board of (TYN812RG) thyristors, and I want to trigger it through some firing board which I am sure it's functioning properly.
I am using 400V to 90V/45V center-tapped transformer, which capable of 1.5A supposedly.
There is no protection other than a fuse on the primary windings, and a 3-pole magneto-thermal switch.
Two identical transformers were tested with different rectifier boards and the same is happening..
Here’s the schematic (i don’t have snubber circuits on thyristors):
I have tried several Y and D combinations of the secondary windings.
I tested with these loads:
https://qph.cf2.quoracdn.net/main-qimg-e6d3f8806e169aa1aaea76136d0edac8
I am connecting the thyristors together in the bridge with a real tiny gauge solid core wires.
The signal I am getting out of the bridge but with longer dead zone.
https://qph.cf2.quoracdn.net/main-qimg-49c4475c6616c5dbc550473aac4c17e1
Firing board datasheet:
https://www.docdroid.net/uMz93Hj/document
I have this problem as mentioned in the subject, which happens when I connect the transformer to a " 3-phase full wave controlled bridge rectifier ".
I have a fully controlled bridge rectifier board of (TYN812RG) thyristors, and I want to trigger it through some firing board which I am sure it's functioning properly.
I am using 400V to 90V/45V center-tapped transformer, which capable of 1.5A supposedly.
There is no protection other than a fuse on the primary windings, and a 3-pole magneto-thermal switch.
Two identical transformers were tested with different rectifier boards and the same is happening..
Here’s the schematic (i don’t have snubber circuits on thyristors):
I have tried several Y and D combinations of the secondary windings.
I tested with these loads:
https://qph.cf2.quoracdn.net/main-qimg-e6d3f8806e169aa1aaea76136d0edac8
I am connecting the thyristors together in the bridge with a real tiny gauge solid core wires.
The signal I am getting out of the bridge but with longer dead zone.
https://qph.cf2.quoracdn.net/main-qimg-49c4475c6616c5dbc550473aac4c17e1
Firing board datasheet:
https://www.docdroid.net/uMz93Hj/document