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Title: Soft Switching Over the Entire Line Cycle for a Quadruple Active Bridge DCX in a DC to Three-Phase AC Module: Preprint

Abstract

This paper is focused on a dc to 3-phase ac module consisting of a transformer-isolated quadruple active bridge (QAB) dc-dc converter, followed by three full-bridge dc-ac inverters. The QAB outputs provide time-varying power at twice the line frequency, which presents challenges in maintaining zero voltage switching (ZVS) on the secondary side during low-power intervals. It is shown how ZVS can be maintained even at zero power transfer using a relatively small circulating current provided by the magnetizing inductances of the high frequency transformers. The approach is particularly effective in high-voltage applications using SiC MOSFETs, where the reductions in switching losses outweigh conduction losses due to the circulating currents. A detailed analysis is presented to address optimum sizing of the magnetizing inductance and determination of QAB dead-times including nonlinear device capacitance effects. The approach is verified by experimental results on a 600V, 5kW prototype where a 50% reduction in total loss is demonstrated, resulting in 98.4% measured full-load efficiency.

Authors:
 [1];  [1];  [2];  [2];  [3];  [2];  [1]
  1. University of Colorado
  2. University of Washington
  3. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); USDOE National Renewable Energy Laboratory (NREL), Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1583089
Report Number(s):
NREL/CP-5D00-74449
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 2020 IEEE Applied Power Electronics Conference and Exposition (IEEE APEC), 15-19 March 2020, New Orleans, Louisiana
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 24 POWER TRANSMISSION AND DISTRIBUTION; C2; soft switching; zero voltage switching; quadruple active bridge

Citation Formats

Majmunovic, Branko, Mukherjee, Satyaki, Mallik, Rahul, Dutta, Soham, Seo, Gabsu, Johnson, Brian, and Maksimovic, Dragan. Soft Switching Over the Entire Line Cycle for a Quadruple Active Bridge DCX in a DC to Three-Phase AC Module: Preprint. United States: N. p., 2020. Web.
Majmunovic, Branko, Mukherjee, Satyaki, Mallik, Rahul, Dutta, Soham, Seo, Gabsu, Johnson, Brian, & Maksimovic, Dragan. Soft Switching Over the Entire Line Cycle for a Quadruple Active Bridge DCX in a DC to Three-Phase AC Module: Preprint. United States.
Majmunovic, Branko, Mukherjee, Satyaki, Mallik, Rahul, Dutta, Soham, Seo, Gabsu, Johnson, Brian, and Maksimovic, Dragan. Wed . "Soft Switching Over the Entire Line Cycle for a Quadruple Active Bridge DCX in a DC to Three-Phase AC Module: Preprint". United States. https://www.osti.gov/servlets/purl/1583089.
@article{osti_1583089,
title = {Soft Switching Over the Entire Line Cycle for a Quadruple Active Bridge DCX in a DC to Three-Phase AC Module: Preprint},
author = {Majmunovic, Branko and Mukherjee, Satyaki and Mallik, Rahul and Dutta, Soham and Seo, Gabsu and Johnson, Brian and Maksimovic, Dragan},
abstractNote = {This paper is focused on a dc to 3-phase ac module consisting of a transformer-isolated quadruple active bridge (QAB) dc-dc converter, followed by three full-bridge dc-ac inverters. The QAB outputs provide time-varying power at twice the line frequency, which presents challenges in maintaining zero voltage switching (ZVS) on the secondary side during low-power intervals. It is shown how ZVS can be maintained even at zero power transfer using a relatively small circulating current provided by the magnetizing inductances of the high frequency transformers. The approach is particularly effective in high-voltage applications using SiC MOSFETs, where the reductions in switching losses outweigh conduction losses due to the circulating currents. A detailed analysis is presented to address optimum sizing of the magnetizing inductance and determination of QAB dead-times including nonlinear device capacitance effects. The approach is verified by experimental results on a 600V, 5kW prototype where a 50% reduction in total loss is demonstrated, resulting in 98.4% measured full-load efficiency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {1}
}

Conference:
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