Do-it-yourself welding inverter. Encyclopedia of radio electronics and electrical engineering

Encyclopedia of radio electronics and electrical engineering / welding equipment

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Your attention is presented with a diagram of a welding inverter, which you can assemble with your own hands. The maximum current consumption is 32 amperes, 220 volts. The welding current is about 250 amperes, which makes it possible to weld without problems with a 5th electrode, the arc length is 1 cm, which passes more than 1 cm into a low-temperature plasma. The efficiency of the source is at the store level, or maybe better (meaning inverter).

Figure 1 shows a diagram of a power supply for welding.

Rice. 1 Schematic diagram of the power supply (click to enlarge)

The transformer is wound on a core Ш8х8 2000nm. Gap 0.05mm - newspaper. Primary winding - 125 turns of wire 0.35mm. Secondary windings - 11 turns with 0.35mm wire, and 1mm for 0.5 ampere.
The weight of the power supply turned out to be about 350 grams

Rice. 2 Schematic diagram of the welding inverter (click to enlarge)

Figure 2 is a diagram of a welder. Frequency - 41 kHz, but you can try 55 kHz. The transformer is then 9 turns by 3 turns. To increase the PV of the transformer.
L2 is wound on a W20x2 core, 5 turns, gap 0.2mm (two layers of paper from the printer).
Current sensor - transformer - two sets of W20x28 2000nm, gap 0.5mm, newspaper gasket, 12vit x 4vit, 10kv x 30kv, copper tape (tin) in paper. Thickness 0.25mm, width 40mm.

Download printed circuit boards in LAY format and other files

If you have any questions when assembling a welder, write to E-Mail.

Author: Evgeny Rodikov, evgen100777 [dog] rambler.ru; Publication: cxem.net

See other articles Section welding equipment.

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