An Auxiliary-Capacitor-Based Active Phase Converter With Reduced Device Current Stress

Adapa, Anil K and John, Vinod (2018) An Auxiliary-Capacitor-Based Active Phase Converter With Reduced Device Current Stress. In: IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 66 (9). pp. 6925-6935.

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Abstract

Reduced switch active phase converters (APC) are cost-effective solutions for running three-phase loads from single-phase grids. This paper proposes a novel auxiliary-capacitor-based APC (AC-APC) for this application. The combination of the topological location of the auxiliary capacitor and the control of the AC-APC reduces current stress on the semiconductor devices. In this paper, a selection criterion for the optimal auxiliary capacitor value is formulated to reduce the device currents in such a way that the overall efficiency is enhanced. This paper presents a comparative analysis of converter volt-ampere (VA) rating and device power loss for conventional H-bridge active front-end and inverter-based topology, APC, and AC-APC. To evaluate the efficacy of the proposed AC-APC, an experimental study is conducted on the APC and the AC-APC feeding a 3-hp three-phase induction motor. At a full load of 2.5 kW and 0.8 power factor, the measured maximum efficiency of the AC-APC is 2% higher than that of the APC. Analytical evaluation of converter currents and device power loss are in close agreement with experimental observations.

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
Keywords:	Active phase-converter (APC); auxiliary capacitor; device currents; phasor analysis; power conversion; power loss; power quality; reduced switch count
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	23 May 2019 09:58
Last Modified:	23 May 2019 09:58
URI:	http://eprints.iisc.ac.in/id/eprint/62704

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