Improving Inductive Welding System Performance with Soft Magnetic Composites

Inductive welding systems used to make metal tubes often incorporate a ferrite impeder to limit induced electrical current on the ID of the tube under the induction coil. This paper assesses the improvement that can be achieved through the use of soft magnetic composites, instead of ferrite, and the addition of an external magnetic controller or bridge. The authors explain how they simulated the potential impact of the two design modifications and experimentally verified the results.