Suppression of Lower Order Harmonics for the Full Modulation Range for a Two-Level Inverter-Fed im Drive with a Switched-Capacitive Filter Technique Forming a 42-Sided Voltage Space Vector Structure

Dewani, R and Rakesh, R and Gopakumar, K and Loganathan, U and Zielinski, D and Franquelo, LG (2021) Suppression of Lower Order Harmonics for the Full Modulation Range for a Two-Level Inverter-Fed im Drive with a Switched-Capacitive Filter Technique Forming a 42-Sided Voltage Space Vector Structure. In: IEEE Transactions on Industrial Electronics, 68 (8). pp. 6701-6709.

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Abstract

This article proposes an inverter topology for the first time for suppression of all lower order harmonics (5th, 7th, 11th, 13th, etc.) up to 39th harmonic. The lower order harmonic suppression is achieved by switching the 42-sided polygonal vectors, which eliminates harmonics in phase voltage without using a passive LC filtering technique. The power circuit topology uses a single dc-link supply for the primary inverter. The secondary inverter is fed with a capacitive supply. A novel topology is proposed for the dense six-level secondary inverter. The lower order harmonics in phase voltage are suppressed using the secondary inverter, which acts like a switched-capacitive filter. This article also proposes a novel capacitor voltage-balancing scheme for the first time, which achieves voltage balancing for secondary inverter capacitors. The voltages of secondary inverter capacitors are balanced using the power balance relationship between the primary inverter and the motor load. An experimental study of the topology and the capacitor-balancing scheme is presented for the validation of proposed scheme. © 1982-2012 IEEE.

Item Type:	Journal Article
Publication:	IEEE Transactions on Industrial Electronics
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Balancing; Electric inverters; Harmonic analysis; Modulation; Topology; Vector spaces, Capacitive filters; Capacitor voltage balancing; Filtering technique; Inverter topologies; Lower order harmonics; Power circuit topologies; Two-level inverters; Voltage space vectors, Passive filters
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	03 Aug 2021 10:47
Last Modified:	03 Aug 2021 10:47
URI:	http://eprints.iisc.ac.in/id/eprint/68910

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