Exact Solution of ZVS Boundaries and AC-Port Currents in Dual Active Bridge Type DC-DC Converters

This letter presents an approach to develop an exact, unified model of zero voltage switching (ZVS) regions and ac-port currents (peak and RMS) in dual active bridge type dc-dc converters for all its operating modes and modulation strategies. It is executed for a single-phase system, where the metho...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2019-06, Vol.34 (6), p.5043-5047
Main Authors: Shah, Suyash Sushilkumar, Iyer, Vishnu Mahadeva, Bhattacharya, Subhashish
Format: Article
Language:English
Subjects:
AC current
Alternating current
bidirectional dc–dc converter
Bridge circuits
Computer simulation
dual active bridge (DAB)
Electric bridges
Electric converters
Legged locomotion
Modeling
Modulation
peak current
Power transfer
RMS current
Semiconductor devices
soft switching
Switches
Switching
Zero voltage switching
zero voltage switching (ZVS)
ZVS boundaries
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Summary:This letter presents an approach to develop an exact, unified model of zero voltage switching (ZVS) regions and ac-port currents (peak and RMS) in dual active bridge type dc-dc converters for all its operating modes and modulation strategies. It is executed for a single-phase system, where the method is used to compute closed-form expressions of ac current at switching instants. Then, exact formulae of ZVS regions for all devices, system peak, and RMS currents are derived. Simulation and hardware results for forward and reverse power transfer are reported to validate the proposed approach.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2018.2884294