Analysis of a Three-Level Bidirectional ZVS Resonant Converter

A bidirectional three-level soft switching circuit topology is proposed and implemented for medium voltage applications such as 750 V dc light rail transit, high power converters, or dc microgrid systems. The studied converter is constructed with a three-level diode-clamp circuit topology with the a...

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Main Authors: Bor-Ren Lin, Wei-Po Liu
Format: Article
Language:English
Published: MDPI AG 2020-12-01
Series:Applied Sciences
Subjects:
Online Access:https://www.mdpi.com/2076-3417/10/24/9136
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author Bor-Ren Lin
Wei-Po Liu
author_facet Bor-Ren Lin
Wei-Po Liu
author_sort Bor-Ren Lin
collection DOAJ
description A bidirectional three-level soft switching circuit topology is proposed and implemented for medium voltage applications such as 750 V dc light rail transit, high power converters, or dc microgrid systems. The studied converter is constructed with a three-level diode-clamp circuit topology with the advantage of low voltage rating on the high-voltage side and a full-bridge circuit topology with the advantage of a low current rating on the low-voltage side. Under the forward power flow operation, the three-level converter is operated to regulate load voltage. Under the reverse power flow operation, the full-bridge circuit is operated to control high-side voltage. The proposed <i>LLC</i> resonant circuit is adopted to achieve bidirectional power operation and zero-voltage switching (ZVS). The achievability of the studied bidirectional ZVS converter is established from the experiments.
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spelling doaj.art-1dcbd2c7c53c49618873f4267453cb062023-11-21T01:57:20ZengMDPI AGApplied Sciences2076-34172020-12-011024913610.3390/app10249136Analysis of a Three-Level Bidirectional ZVS Resonant ConverterBor-Ren Lin0Wei-Po Liu1Department of Electrical Engineering, NYUST, 123, Section 3, University Road, Yunlin 640, TaiwanDepartment of Electrical Engineering, NYUST, 123, Section 3, University Road, Yunlin 640, TaiwanA bidirectional three-level soft switching circuit topology is proposed and implemented for medium voltage applications such as 750 V dc light rail transit, high power converters, or dc microgrid systems. The studied converter is constructed with a three-level diode-clamp circuit topology with the advantage of low voltage rating on the high-voltage side and a full-bridge circuit topology with the advantage of a low current rating on the low-voltage side. Under the forward power flow operation, the three-level converter is operated to regulate load voltage. Under the reverse power flow operation, the full-bridge circuit is operated to control high-side voltage. The proposed <i>LLC</i> resonant circuit is adopted to achieve bidirectional power operation and zero-voltage switching (ZVS). The achievability of the studied bidirectional ZVS converter is established from the experiments.https://www.mdpi.com/2076-3417/10/24/9136PWM convertersresonant converterfrequency controlanalog circuit
spellingShingle Bor-Ren Lin
Wei-Po Liu
Analysis of a Three-Level Bidirectional ZVS Resonant Converter
Applied Sciences
PWM converters
resonant converter
frequency control
analog circuit
title Analysis of a Three-Level Bidirectional ZVS Resonant Converter
title_full Analysis of a Three-Level Bidirectional ZVS Resonant Converter
title_fullStr Analysis of a Three-Level Bidirectional ZVS Resonant Converter
title_full_unstemmed Analysis of a Three-Level Bidirectional ZVS Resonant Converter
title_short Analysis of a Three-Level Bidirectional ZVS Resonant Converter
title_sort analysis of a three level bidirectional zvs resonant converter
topic PWM converters
resonant converter
frequency control
analog circuit
url https://www.mdpi.com/2076-3417/10/24/9136
work_keys_str_mv AT borrenlin analysisofathreelevelbidirectionalzvsresonantconverter
AT weipoliu analysisofathreelevelbidirectionalzvsresonantconverter