A Hybrid Multilevel Inverter System Based on Dodecagonal Space Vectors for Medium Voltage IM Drives

Mathew, Jaison and Mathew, K and Azeez, Najath Abdul and Rajeevan, PP and Gopakumar, K (2013) A Hybrid Multilevel Inverter System Based on Dodecagonal Space Vectors for Medium Voltage IM Drives. In: IEEE TRANSACTIONS ON POWER ELECTRONICS, 28 (8). pp. 3723-3732.

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Abstract

Dodecagonal (12-sided) space vector pulsewidth modulation (PWM) schemes are characterized by the complete absence of (6n +/- 1)th-order harmonics (for odd n) in the phase voltages, within the linear modulation range and beyond, including over-modulation. This paper presents a new topology suitable for the realization of such multilevel inverter schemes for induction motor (IM) drives, by cascading two-level inverters with flying-capacitor-inverter fed floating H-bridge cells. Now, any standard IM may be used to get the dodecagonal operation which hitherto was possible only with open-end winding IM. To minimize the current total harmonic distortion (THD), a strategy for synchronous PWM is also proposed. It is shown that the proposed method is capable of obtaining better THD figures, compared to conventional dodecagonal schemes. The topology and the PWM strategy are validated through analysis and subsequently verified experimentally.

Item Type:	Journal Article
Publication:	IEEE TRANSACTIONS ON POWER ELECTRONICS
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	Copyright for this article belongs to IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, USA
Keywords:	Dodecagonal space vector;flying capacitor (FC);induction motor drive;multilevel inverters;space vector modulation;total harmonic distortion (THD)
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	14 Mar 2013 09:45
Last Modified:	14 Mar 2013 09:45
URI:	http://eprints.iisc.ac.in/id/eprint/45983

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