daleyd
Member
- Messages
- 9,843
- Location
- Wrexham, North Wales
No, I’m afraid they don’t switch on and off quickly - at least not fast enough to control current in an application like this. I think they are used in this application purely as an on/off device - any fine control will done with some semiconductor deviceWe said that or better I said that because the manufacturer says that
But take a look at the pictures
The rectifier apparently is just a normal rectifier there are not SCR in it
I think that wath they mean with PWM is probably that the output current is controlled by switching it on and off
Contactors can be really fast switching current on and off
Older AC DC Tig set use two contactor and some sort of control to swapping the polarity and varying the frequency
Starting from DC