berger.h
Member level 5
I have a welding inverter for TIG, in essence it is a switched current source DC 5-160A.
An AC inverter is required for aluminum welding, or the polarity of the electrodes must be changed.
Expensive inverters also allow pulse welding with adjustable pulse length and frequency, etc.
I don't want to spend $ 2,000 on an inverter that can do it all
My idea
Add a full H bridge to the output of the DC inverter. With 8pcs 80V 300A MOSFETS 1.2m Ohm it is possible to build a bridge with a resistance of 1.2mOhm.
8x IPT012N08N5 15$
4x driver for exmaple TC4452VOA 5$
2x Digital isolator for HS MOSFET any as SI8620BB 3$
2X DV/DV for HS MOSFET 5$
1z STM32F334 5$
Sum 35$ + ALU PCB
DC TIG+
DC TIG-
DC Pulse 0-500 Hz frequency control, etc.
AC frequency control etc.
Am I missing something?
An AC inverter is required for aluminum welding, or the polarity of the electrodes must be changed.
Expensive inverters also allow pulse welding with adjustable pulse length and frequency, etc.
I don't want to spend $ 2,000 on an inverter that can do it all
My idea
Add a full H bridge to the output of the DC inverter. With 8pcs 80V 300A MOSFETS 1.2m Ohm it is possible to build a bridge with a resistance of 1.2mOhm.
8x IPT012N08N5 15$
4x driver for exmaple TC4452VOA 5$
2x Digital isolator for HS MOSFET any as SI8620BB 3$
2X DV/DV for HS MOSFET 5$
1z STM32F334 5$
Sum 35$ + ALU PCB
DC TIG+
DC TIG-
DC Pulse 0-500 Hz frequency control, etc.
AC frequency control etc.
Am I missing something?