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Evaluation of the hybrid four-level converter employing half-bridge modules for two different modulation schemes

A novel hybrid three-phase multilevel converter is proposed for medium-voltage applications. The converter employs a conventional three-phase voltage source inverter (VSI) linking series connected half-bridge modules at each phase. With the proposed connection, a large portion of energy can be proce...

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Main Authors:	Batschauer, A.L., Perin, A.J., Mussa, S.A., Heldwein, M.L.
Format:	Conference Proceeding
Language:	English
Subjects:	Circuit topology Frequency Galvanizing Joining processes Leg Medium voltage Power semiconductor switches Power transformer insulation Pulse width modulation Pulse width modulation inverters
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creator	Batschauer, A.L. Perin, A.J. Mussa, S.A. Heldwein, M.L.
description	A novel hybrid three-phase multilevel converter is proposed for medium-voltage applications. The converter employs a conventional three-phase voltage source inverter (VSI) linking series connected half-bridge modules at each phase. With the proposed connection, a large portion of energy can be processed by the VSI without the need for insulation or by employing a single transformer, while smaller power shares are processed within the half-bridge modules. Thus, the requirements for galvanically insulated dc sources are reduced. Modularity is naturally achieved. A modulation scheme for a four-level version is proposed and analyzed in detail. This scheme allows unidirectional power flow in all dc sources and, consequently enables diode bridges to be employed in the rectification input stage for unidirectional applications.
doi_str_mv	10.1109/APEC.2010.5433394
format	conference_proceeding
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issn	1048-2334 2470-6647
language	eng
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source	IEEE Xplore All Conference Series
subjects	Circuit topology Frequency Galvanizing Joining processes Leg Medium voltage Power semiconductor switches Power transformer insulation Pulse width modulation Pulse width modulation inverters
title	Evaluation of the hybrid four-level converter employing half-bridge modules for two different modulation schemes
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