Optimized linear contactless power transmission systems for different applications

Linear contactless power transmission systems are proposed as alternative power supplies to mobile loads used in harsh environments. Such systems comprise a core with a secondary winding sliding along an extended primary winding. In long applications the transformer primary winding is the most limiting component in the system whereas in short applications the transformer core size is usually the detrimental factor. Formulas to optimize and design sliding transformers for different applications are given. The implementation of these formulas are then illustrated by designs for three different applications. Experimental waveforms for a 5 m, 15 kVA sliding transformer are presented.