A Novel Theory of Three Phases to Eleven Phases

Abstract

More than three-phase electric power is called multiphase .multiphase electric drive system is very important in research in the last decade. Multiphase power transmission system is also investigated in the literature survey, because multiphase transformers are needed at the input of rectifiers. In the multiphase power transmission and multiphase rectifier systems, the number of phases investigated is a multiple of three. However, the variable speed multiphase drive system are mostly of five, seven, nine, eleven, twelve, and fifteen phases. Multiphase is supplied from power electronic devices (converters). This paper proposes technique to obtain Eleven-phase output from three-phase supply system using novel transformer with special connections. Thus, with the special transformer, a pure eleven phase sine-wave voltage/current is obtained, which can be used for load testing purposes. Complete design of the proposed solution is presented. Analytical analysis is presented in the paper.