Low-Frequency DC-Link Capacitor Current Mitigation in Reduced Switch Count Single-Phase to Three-Phase Converter

Adapa, AK and Bhowmick, S and John, V (2020) Low-Frequency DC-Link Capacitor Current Mitigation in Reduced Switch Count Single-Phase to Three-Phase Converter. In: IEEE Transactions on Industrial Electronics, 68 (4). pp. 3058-3068.

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Abstract

This article proposes an approach to mitigate the dc-link double-frequency ripple current in a three-leg single-phase to three-phase converter. This article is based on an economical active phase converter (APC) utilizing a fewer number of switches. The presented approach does not demand either bulky dc side passive ripple filter or additional semiconductor switches typically employed in active dc-link ripple filters. The proposed method introduces an appropriately selected ac capacitor into the APC circuit, also known as auxiliary capacitor-based APC, which mitigates the dc-link double-frequency ripple. Reduction of power loss in the equivalent series resistor of the dc-bus capacitor associated with the dc-link double-frequency ripple current enhances the lifetime of electrolytic capacitor typically employed in the APC. At full load, the dc-link current at double-fundamental frequency is reduced by more than 50% and the temperature rise in the dc-bus electrolytic capacitors is reduced by more than 30%. The proposed method is validated experimentally using a laboratory prototype APC. Theoretical and simulation results of the dc-link double-frequency current are in close agreement with the experimental findings. © 1982-2012 IEEE.

Item Type:	Journal Article
Publication:	IEEE Transactions on Industrial Electronics
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	Copyright to this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Electrolytic capacitors; Switching frequency, Dc link capacitor; Dc link currents; Double frequency; Fundamental frequencies; Number of switches; Phase converters; Temperature rise; Three-phase converter, Power converters
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology) Division of Electrical Sciences > Electrical Engineering
Date Deposited:	15 Feb 2021 08:24
Last Modified:	15 Feb 2021 08:24
URI:	http://eprints.iisc.ac.in/id/eprint/67511

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