High Frequency Multiphase Travelling Field Configuration For Direction Controlled EM Forces Production

Abstract : Some EPM applications require travelling field inductors able to create stirring or pumping forces whose direction can be inverted if necessary. These inductor configurations are multiphased and come from the well known 50 Hz (or 60 Hz) 3-phase asynchronous motor. But in the middle or high frequency area the problem is that most of the induction generators are single phase self resonant oscillating generators. This paper shows how it is possible to transform this kind of single phase inductor into a double phase one made of two oscillating circuits whose one is feed by the single phase generator and the other is coupling on it by mutual inductance. This double phase inductor, which is based on the “single phase asynchronous motor” is then able to produce a middle or high frequency travelling field. In a first part the design of such inductor is presented. Then in a second part the electrical working of this double oscillating circuit with several possible resonance frequencies is explained. At last some induction applications using this principle and which have been experienced on lab scale prototypes are shown.
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https://hal.archives-ouvertes.fr/hal-01336392
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Submitted on : Thursday, June 23, 2016 - 9:45:33 AM
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R Ernst, Cédric Garnier. High Frequency Multiphase Travelling Field Configuration For Direction Controlled EM Forces Production. 8th International Conference on Electromagnetic Processing of Materials, Oct 2015, Cannes, France. ⟨hal-01336392⟩

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