A nine-level inverter topology for medium-voltage induction motor drive with open-end stator winding

Rajeevan, PP and Sivakumar, K and Gopakumar, K and Patel, Chintan and Abu-Rub, Haitham (2013) A nine-level inverter topology for medium-voltage induction motor drive with open-end stator winding. In: IEEE Transactions on Industrial Electronics, 60 (9). pp. 3627-3636.

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Abstract

A new scheme for nine-level voltage space-vector generation for medium-voltage induction motor (IM) drives with open-end stator winding is presented in this paper. The proposed nine-level power converter topology consists of two conventional three-phase two-level voltage source inverters powered by isolated dc sources and six floating-capacitor-connected H-bridges. The H-bridge capacitor voltages are effectively maintained at the required asymmetrical levels by employing a space vector modulation (SVPWM) based control strategy. An interesting feature of this topology is its ability to function in five-or three-level mode, in the entire modulation range, at full-power rating, in the event of any failure in the H-bridges. This feature significantly improves the reliability of the proposed drive system. Each leg of the three-phase two-level inverters used in this topology switches only for a half cycle of the reference voltage waveform. Hence, the effective switching frequency is reduced by half, resulting in switching loss reduction in high-voltage devices. The transient as well as the steady-state performance of the proposed nine-level inverter-fed IM drive system is experimentally verified in the entire modulation range including the overmodulation region.

Item Type:	Journal Article
Publication:	IEEE Transactions on Industrial Electronics
Publisher:	IEEE-Inst Electrical Electronics Engineers Inc
Additional Information:	Copyright of this article belongs to IEEE-Inst Electrical Electronics Engineers Inc.
Keywords:	Induction Motor (IM) Drives; Multilevel Inverters
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	27 Jun 2013 07:54
Last Modified:	27 Jun 2013 07:54
URI:	http://eprints.iisc.ac.in/id/eprint/46742

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