Stiefel Induction Heaters: Energy-Efficient Solutions Since 2013

Induction heating of copper presents unique challenges due to the metal's extremely high electrical conductivity. High conductivity means copper tends to reflect a significant portion of the electromagnetic field rather than absorbing it as heat, especially at lower frequencies. Therefore, successful induction heating of copper requires specialized equipment operating at very high frequencies, typically in the ultrasonic range (above 50 kHz). At these high frequencies, the skin effect is more pronounced, forcing the current into a thinner layer and increasing the electrical resistance, which in turn generates heat more effectively. Key industrial applications for copper induction heating include brazing copper pipes and fittings in HVAC&R systems, annealing copper wires and cables to restore malleability after drawing, and heating copper billets for forging. The process is fast, clean, and provides excellent control, preventing the oxidation that can occur with flame heating. Stiefel Combustion has developed expertise in designing high-frequency induction systems specifically optimized for non-ferrous metals like copper. Our systems are calibrated to deliver the precise energy density required for efficient and controlled heating of copper components. If your manufacturing process involves heating copper and you seek a reliable, high-quality solution, we encourage you to contact our application engineers to discuss your specific requirements.