A Ten-Level Inverter Fed Drive Scheme with Extended Linear Modulation Range

Pal, S and Ghosh Majumder, M and Resalayyan, R and Gopakumar, K and Umanand, L and Malinowski, M and Zielinski, D (2022) A Ten-Level Inverter Fed Drive Scheme with Extended Linear Modulation Range. In: IEEE Transactions on Industrial Electronics, 69 (12). pp. 12261-12269.

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Abstract

In this work, a ten-level inverter scheme is presented to extend the linear modulation range (LMR) by using a unique space vector pulsewidth modulation (SVPWM) technique, such that no lower order harmonics (such as 5th, 7th, 11th, and 13th, etc.) are present in the phase voltage as compared to six-step mode operation. The proposed scheme can increase the peak phase fundamental voltage of the inverter from 0.577 to 0.637 Vdc (maximum possible peak phase fundamental voltage of a conventional hexagonal space vector structure (SVS) voltage source inverters while operating in six-step mode), irrespective of the load power factor (p.f), where Vdc is the dc link voltage of the inverter. The ten-level inverter structure is formed using a two-level inverter and an H-bridge (HB) in cascade from one end and a floating capacitor-based two-level inverter cascaded with an HB from the other end to drive an open-end winding induction motor (OEWIM). All the HB capacitor voltages are balanced by using space vector redundancy. The claim of balancing the capacitor voltages throughout the whole modulation range is verified experimentally in this article. Experimental results at different steady-state and transient conditions are shown to validate the proposed inverter scheme's efficacy in increasing the LMR. © 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 the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Bandpass filters; Bridge circuits; Electric inverters; Harmonic analysis; Pulse width modulation; Vector spaces; Voltage control, 10-level inverte; Induction motor drive; Inductions motors; Inverter; Linear modulations; Power harmonic filters; Pulsewidth modulations (PWM); Space Vector; Space vector structure; Vector structures, Induction motors
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	06 Oct 2022 09:26
Last Modified:	06 Oct 2022 09:26
URI:	https://eprints.iisc.ac.in/id/eprint/77176

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