Generalised Model of Multiphase Tesla’s Egg of Columbus and Practical Analysis of 3-Phase Design

Abstract

“Tesla’s Egg of Columbus” is the project of Nikola Teslathat proved the existence of rotating field produced by two-phase AC winding in1893. Here in this study, generalised mathematical magnetic field model form-phase “Tesla’s Egg of Columbus” is established with its details. 3-phasemodel of “Tesla’s Egg of Columbus” that is non-existing in the literature isdesigned analytically by means of generalised expressions. Electrical andgeometric quantities are calculated and the system is analysed by Finite ElementsAnalysis (FEA). The designed system is manufactured and tested at rated currentfor constant and variable frequency with eggs made of different materials.Optimised frequency for materials and geometries are obtained and compared.