This paper presents a comprehensive analysis of the 5-phase induction motor driven by voltage-source inverter drives and particularly its steady-state performance evaluation. The performance of various modulation methods are analyzed with insightful look into their harmonic content and torque ripple. Three separate methods are proposed to reduce the torque ripple for low, middle and high modulation index regions while eliminating or controlling the non-torque-producing harmonics within the current machine rating. A complete set of simulations are carried out to verify the concepts and proposed methods. The multi-level multiphase topology is introduced and it is compared to the two-level system. The modification of switching sequence for reduction of torque ripple is applied to the three-level 5-phase motor drive. Application of the multilevel multi-phase concept to high power motor drives (as well as motor design and selection) is discussed.

Meeting Name

IEEE Electric Ship Technologies Symposium, 2005


Electrical and Computer Engineering

Keywords and Phrases

5-Phase Induction Motor; Electric Propulsion; Harmonic Content; High Power Motor Drives; Induction Motor Drives; Invertors; Modulation Index; Multilevel Multiphase Propulsion Drives; Multilevel Multiphase Topology; Switching Sequence; Three-Level 5-Phase Motor Drive; Torque Ripple Reduction; Voltage-Source Inverter Drives

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2005 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jul 2005