Computer-aided design of pancake coils for induction heaters

Abstract

Pancake coils are used extensively in induction-heating applications. Closed-form design relationships for pancake coils are not available. Finite-element methods require powerful software. This paper gives a simple and quick numerical way of designing pancake coils. Calculated and measured results are presented. Measured results on asymmetrical coils are also presented. It is possible to relate empirically the predicted results of symmetrical calls to the measured results of asymmetrical coils.