A Generalized Space Vector Modulation Algorithm for Multilevel Inverters - Induction Motor Fed

In this paper a new Space Vector Pulse Width Modulation (SVPWM) algorithm is proposed for multilevel voltage source inverters. The proposed algorithm directly identifies the two-level subhexagon in which the reference voltage vector lies. The switching sequence corresponding to a two-level inverter is determined. The proposed method can be extended to any m-level inverter and a generalized algorithm is proposed. Based on the mathematical model presented, a five-level inverter, induction motor" system is investigated in steady state and transient responses. The induction motor is controlled using Field Oriented Control (F.O.C.). The improvement of the control scheme is achieved using Mamdani's fuzzy logic controller for both rotor speed and inverter current. The electric drive system is simulated in case of a five-level inverter and the presented results verify the good performance of the proposed SVPWM algorithm. Copyright (C) 2012 Praise Worthy Prize S.r.l. - All rights reserved.