Matching Networks

It is necessary to accurately match the amplifier to the load with solid-state amplifiers the starting point is that they are designed for use with a fixed 50W non-reactive load. Applications such as plastics welding represent a highly dynamic load that must be accurately matched to the amplifier throughout the weld cycle. We achieve this by utilising a purpose designed automatic matching network, which acts to transform the real part and cancel the reactive elements in the system thus ensuring that the amplifier only ever sees a 50W non-reactive load.

This requirement has the benefit that the amplifier is matched throughout the weld cycle rather than for just a brief part of it. The end result can be a significant reduction in weld time or to permit larger areas to be welded per kW. In certain applications our systems have realised a 50% reduction in the power required, delivering significant energy cost savings.

The ability to separate the amplifier and matching system has further advantages given that it allows the amplifier to be mounted remotely from the machine. The primary benefit being that only the physically smaller and lighter matching network needs to be mounted at the weld station. The RF power interconnection between matching network and amplifier is a simple proprietary flexible coaxial cable and connectors. Although fully automatic all control and monitoring functions of both the amplifier and matching system may be duplicated at the machine operator panel.