A Simple Carrier-Based Implementation for a General 3-level Inverter Using Nearest Three Space Vector PWM Approach

Dholakia, A and Paul, S and Ghotgalkar, S and Basu, K (2020) A Simple Carrier-Based Implementation for a General 3-level Inverter Using Nearest Three Space Vector PWM Approach. In: ECCE 2020 - IEEE Energy Conversion Congress and Exposition, 11 - 15 October 2020, Virtual, Detroit, pp. 4349-4355.

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Abstract

This paper proposes a novel carrier-based implementation strategy of a standard space-vector pulse-width modulation (SVPWM) technique of three-phase (3f) three-level inverter (TLI). To synthesize the reference voltage vector, the selected SVPWM technique uses nearest three voltage space-vectors in order to reduce output voltage THD and partially balance the neutral point voltage. The implementation complexity of this SVPWM technique is reduced by introducing the concept of common-mode signal in duty-ratio calculation of 3f-TLI. Following the modulation strategy of the selected SVPWM technique, general expression of common-mode signal has been derived in terms of maximum, middle and minimum values of input 3f modulation signals. It is shown in the paper that six duty ratios of 3f-TLI can be directly calculated from the input 3f modulation signals and the derived common-mode signal. Thus, calculation-intensive steps of SVPWM technique, like, identification of reference voltage vector location, calculation of dwell-times of individual vectors, are avoided. The proposed algorithm is validated through simulation in MATLAB and experiment on 1.5 kW hardware prototype. © 2020 IEEE.

Item Type:	Conference Paper
Publication:	ECCE 2020 - IEEE Energy Conversion Congress and Exposition
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:	Electric inverters; Energy conversion; MATLAB; Pulse width modulation; Vectors; Voltage control, Implementation complexity; Implementation strategies; Modulation strategy; Neutral-point voltages; Simulation in matlabs; Space vector pulse width modulation; Three-level inverters; Voltage space vectors, Vector spaces
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	11 Feb 2023 04:29
Last Modified:	11 Feb 2023 04:29
URI:	https://eprints.iisc.ac.in/id/eprint/80188

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