Title: Control strategies for dual inverter fed vector controlled induction motor drive

Authors: M. Harsha Vardhan Reddy; T. Brahmananda Reddy; B. Ravindranath Reddy; M. Suryakalavathi

Addresses: Department of Electrical and Electronics Engineering, G. Pulla Reddy Engineering College (Autonomous), Kurnool, Andhra Pradesh 518002, India ' Department of Electrical and Electronics Engineering, G. Pulla Reddy Engineering College (Autonomous), Kurnool, Andhra Pradesh 518002, India ' Department of Electrical and Electronics Engineering, JNTUH, Kukatpally, Hyderabad, Andhra Pradesh 50085, India ' Department of Electrical and Electronics Engineering, JNTUH, Kukatpally, Hyderabad, Andhra Pradesh 50085, India

Abstract: This paper presents a comparative study of various control strategies for dual inverter configuration-based vector controlled drive. The proposed inverter is able to operate as two-level inverter and three-level inverter at different modulation index (M). At high modulating index both inverters are in operation and produce three-level output voltage which produces less current ripple. At low modulation index two-level output voltage is obtained by operating one inverter or two inverters. At lower modulation index, the operation of a single inverter results in reduced current ripple, switching losses, common mode voltage, and voltage stress on switching devices when compared with the two inverter operation. To validate the proposed work numerical simulation has been carried out in MALAB/Simulink environment.

Keywords: dual inverters; multilevel inverters; SVPWM; space vector pulse width modulation; PWM; vector control; control strategies; induction motors; current ripple; switching losses; common mode voltage; voltage stress; numerical simulation.

DOI: 10.1504/IJEHV.2014.065726

International Journal of Electric and Hybrid Vehicles, 2014 Vol.6 No.3, pp.195 - 214

Received: 14 Oct 2013
Accepted: 31 May 2014
Published online: 11 Nov 2014 *

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