20Khz-arc-welding-inverter

  
The Class A series resonant inverter portrayed is well-known and respected for its high efficiency, low cost, and small size, provided that operating frequency is greater than about 3 kHz.
20Khz-arc-welding-inverter - schematic

The disadvantages are, at least in high power versions, the difficulty in effecting smooth RFI-free output voltage modulation




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