Foil Winding Machine – High-Current Coils with Foil Conductors
Foil Winding Machine – High-Current Coils with Foil Conductors
Traditional round wires suffer skin effect in high-current applications. Shandong Bolt's foil winder uses aluminum/copper foil for low-loss coils.
Foil Control
5-50N tension system with laser alignment (±0.05mm):
Maintains flatness for 0.1-0.5mm×1000mm foil.
Controls 0.5-5mm overlap via servo.
5m/min speed handles 2m max diameter coils.
Insulation & Welding
Synchronous DMD/Nomex wrapping (≤0.2mm error).
TIG welding joins leads to foil (≥80% strength).
Robot trims ends to ≤0.5mm flatness.
Optional cleaning removes aluminum oxide.
Advantages
2MW PV inverter coils: 40% lower loss (9W/kg), 60% more 散热 area, 30% smaller volume. Passes State Grid tests for wind/SVG applications.
