2019•Unpublished venueRequires access

A 5-Level Inverter Topology Using a Single DC-Link with Reduced Switch Count for Open-End Induction Motor Drives

Mriganka Ghosh Majumder, Apurv Yadav, K. Gopakumar, L. Umanand, Krishna Raj R, Leopoldo G. Franquelo

Abstract

A multilevel inverter scheme with reduced number of switches using a single DC-link for open-end induction motor drive (OEIM) is presented in this paper. The total inverter system with OEIM yields voltage Space Vector Locations (SVL) alike to a 5-Level inverter. This proposed system is obtained by supplying OEIM with 3-Level inverter from one side and capacitor fed 2-Level inverter from another side. The capacitor of the 2-Level inverter is balanced by Space Vector (SV) redundancy to its nominal voltage of Vdc/4 where Vdcis the DC-link voltage and the flying capacitors in 3-Level inverter is balanced by pole voltage redundancy to its nominal voltage of Vdc/2. The simulation and hardware results for steady and transient state operation are also presented in this paper.

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Key concepts: Inverter, Capacitor, Redundancy (engineering), Topology (electrical circuits), Induction motor, Voltage, Computer science, Transient (computer programming)