Hello friends,
I am working on a spot welder for making lithium ion battery
packs for my projects.
The triac gets destroyed whenever I try to weld with it. The two main AC pins
on the traic become internally shorted. When I use a 40 watt incandescent
light (instead of the welding transformer) it all works as planned.
Nothing blows up.
I am thinking it might be inductive spikes across the triac that is
blowing it up.
Another problem is that I cant seem to capture the voltage
across the triac pins to see if it an inductive kickback from the
transformer.
To try to troubleshoot the circuit, the mains voltage is replaced
with a isolated AC 24volt source but I leave the welding transformer in place
as the loac.
I have a 2 channel storage scope both probes are used to measure
the difference between main triac pins. Both probes have an AC signal
such that I can't seem to use either as a trigger.
This leaves me with out a probe to use as a trigger.
Anyone have any ideas on how I can try to capture the voltage across the
triac ?
I am working on a spot welder for making lithium ion battery
packs for my projects.
The triac gets destroyed whenever I try to weld with it. The two main AC pins
on the traic become internally shorted. When I use a 40 watt incandescent
light (instead of the welding transformer) it all works as planned.
Nothing blows up.
I am thinking it might be inductive spikes across the triac that is
blowing it up.
Another problem is that I cant seem to capture the voltage
across the triac pins to see if it an inductive kickback from the
transformer.
To try to troubleshoot the circuit, the mains voltage is replaced
with a isolated AC 24volt source but I leave the welding transformer in place
as the loac.
I have a 2 channel storage scope both probes are used to measure
the difference between main triac pins. Both probes have an AC signal
such that I can't seem to use either as a trigger.
This leaves me with out a probe to use as a trigger.
Anyone have any ideas on how I can try to capture the voltage across the
triac ?