Hey everyone first time posting in a while. Hopefully this is in the right Forum section. Admins feel free to move.
Here's the Story, I have a 250amp transformed DC Mig welder, that i have been using specifically for Aluminium welding. It has very basic stepped voltage control with 6 settings. As such this makes it either too 'hot' or too 'cold'. Here's a pic of the machine, Note the access to positive and negative outlets.
I want to add pulse function to this machine and possibly double pulse, Like many other high end machines have. which will allow me to set: 1.background current, 2.peak current, 3.frequency.
Single Pulse waveform
Double Pulse Waveform
So in short i Have a low voltage (15vdc-20vdc) high current power that i need to Pulse width modulate.
I thought possibly a couple of modular style mosfet's or IGBT's having their gates controlled by a square wave signal generator. I am reasonably comfortable with PIC chips if necessary
Surprisingly there's not a lot of information around about the design of pulse welders.
Thanks
Kind regards, Brent.
Here's the Story, I have a 250amp transformed DC Mig welder, that i have been using specifically for Aluminium welding. It has very basic stepped voltage control with 6 settings. As such this makes it either too 'hot' or too 'cold'. Here's a pic of the machine, Note the access to positive and negative outlets.
I want to add pulse function to this machine and possibly double pulse, Like many other high end machines have. which will allow me to set: 1.background current, 2.peak current, 3.frequency.
Single Pulse waveform
Double Pulse Waveform
So in short i Have a low voltage (15vdc-20vdc) high current power that i need to Pulse width modulate.
I thought possibly a couple of modular style mosfet's or IGBT's having their gates controlled by a square wave signal generator. I am reasonably comfortable with PIC chips if necessary
Surprisingly there's not a lot of information around about the design of pulse welders.
Thanks
Kind regards, Brent.