A Dual-Active-Bridge-Based Single-Phase AC to DC Power Electronic Transformer With Advanced Features

Power electronic transformers (PETs) offer the advantage of size and weight reduction compared to line-frequency transformers by operating at much higher frequencies than line frequency. In this paper, a push-pull-based ac/dc PET has been proposed and analyzed. The PET offers bidirectional power flo...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2018-01, Vol.33 (1), p.313-331
Main Authors: Baranwal, Rohit, Castelino, Gysler F., Iyer, Kartik, Basu, Kaushik, Mohan, Ned
Format: Article
Language:English
Subjects:
AC-DC conversion
Bridge circuits
dual-active bridge (DAB)
Electric bridges
Electric vehicles
Fuel consumption
Hybrid vehicles
Pets
power electronic transformer (PET)
Power factor
power factor correction
Power flow
Power transfer
Pulse width modulation
pulse width modulation (PWM)
push–pull
Soft switching
Switches
Switching
Topology
Transformers
unity power factor
Weight reduction
Windings
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Summary:Power electronic transformers (PETs) offer the advantage of size and weight reduction compared to line-frequency transformers by operating at much higher frequencies than line frequency. In this paper, a push-pull-based ac/dc PET has been proposed and analyzed. The PET offers bidirectional power flow between single-phase ac and dc, using the dual-active bridge principle. Such a system may find applications in interfacing plug-in hybrid and electric vehicles to the grid. The proposed PET offers advantages of open-loop unity power factor operation, soft switching of secondary-side converter power switches for all operating points, high power density owing to use of a high-frequency transformer, and high utilization factor (UF), compared to previous work. Analysis has been done for power transfer, UF, and soft switching. Simulation and experimental results have been provided to demonstrate the operation of the PET.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2017.2669148