Bidirectional Three-phase Current Source Converter based Buck-boost AC/DC System using Bidirectional Switches

Narwal, Ramandeep; Bhattacharya, Subhashish; Baliga, B. Jayant; Hopkins, Douglas C.

doi:10.1109/itec55900.2023.10186945

Bidirectional Three-phase Current Source Converter based Buck-boost AC/DC System using Bidirectional Switches

Conference · Wed Jun 21 04:00:00 EDT 2023 · 2023 IEEE Transportation Electrification Conference & Expo (ITEC)

DOI:https://doi.org/10.1109/itec55900.2023.10186945· OSTI ID:2324746

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North Carolina State University,FREEDM Systems Center,Department of Electrical and Computer Engineering,Raleigh,NC,USA,27695; North Carolina State University
North Carolina State University,FREEDM Systems Center,Department of Electrical and Computer Engineering,Raleigh,NC,USA,27695

The 1.2 kV 4H-SiC BiDirectional Field Effect Transistor (BiDFET) is the first monolithic SiC bidirectional switch, which offers a lower voltage drop and semiconductor devices count alternative to the reverse-voltage-blocking (RB) switch used in the current-source converters (CSC). The bidirectional switch based CSC also allows DC-link current reversal for bidirectional power flow and provides multiple system-level benefits in a buck-boost AC/DC system consisting of buck-type DC/DC converter and CSC. This paper discusses the selection of buck converter duty cycle and CSC modulation index for the system’s buck-boost operation with a wide variation in DC voltage. CSC modulation schemes categorized based on the number of hard-turn-on transitions per switching cycle are also analyzed along with the three-step and four-step commutation schemes that are essential for the CSC commutation cells. Finally, the different schemes are evaluated and compared through the experimental results of a 10 kW, 480 VRMS, LL/ (400 − 800) V AC/DC system.

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Research Organization:: North Carolina State University

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

DOE Contract Number:: EE0008345

OSTI ID:: 2324746

Conference Information:: Journal Name: 2023 IEEE Transportation Electrification Conference & Expo (ITEC)

Country of Publication:: United States

Language:: English

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modulation
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Bidirectional Three-phase Current Source Converter based Buck-boost AC/DC System using Bidirectional Switches

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