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Dynamic load impedance matching for induction heater systems

By H I Sewell, D A Stone and Chris Bingham

Abstract

It is not normally possible to heat a static steel work-piece past the Curie temperature without incurring reduced inverter utilisation. Since the inverter cost increases with rated power, reduced utilisation implies an increase in investment costs for a given performance. The paper shows that third-order resonant work-head circuits can intrinsically allow better utilisation of the\ud inverter for variable-load heating operations. A further refinement is then shown to allow control of the load impedance, thereby allowing the utilisation to approach 100 percent over the heating cycles

Topics: H600 Electronic and Electrical Engineering
Publisher: MCB UP limited / Emerald
Year: 2003
DOI identifier: 10.1108/03321640310451999
OAI identifier: oai:eprints.lincoln.ac.uk:2675
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