Hi:
I'm working on a Solar wire feed welder. The control circuit board is always on high wire speed and high voltage setting. I found a replacement board for $200. It has one component that looks burnt. It is a TO 220 package semiconductor. I can't read the number due to the damage. Is there a way to guess what component as a replacement? I can get more model info but I doubt there is a schematic available for this particular board.
I am familiar with very basic electrical systems but lacking in constant voltage / constant current supplies work. This small circuit board controls a solid state relay to energize the transformer. It also controls wire speed (easy enough) and welder output voltage. How does a low wattage tiny pot control the voltage and the circuit board stabilize the voltage while it is welding? The secondaries go to a bridge diode rectifier then to the load. It does have an inductor coil. I do not see how any of them are variable. How does it work?
Thank you, hoader
I'm working on a Solar wire feed welder. The control circuit board is always on high wire speed and high voltage setting. I found a replacement board for $200. It has one component that looks burnt. It is a TO 220 package semiconductor. I can't read the number due to the damage. Is there a way to guess what component as a replacement? I can get more model info but I doubt there is a schematic available for this particular board.
I am familiar with very basic electrical systems but lacking in constant voltage / constant current supplies work. This small circuit board controls a solid state relay to energize the transformer. It also controls wire speed (easy enough) and welder output voltage. How does a low wattage tiny pot control the voltage and the circuit board stabilize the voltage while it is welding? The secondaries go to a bridge diode rectifier then to the load. It does have an inductor coil. I do not see how any of them are variable. How does it work?
Thank you, hoader