Title :
Optimal design of a high-efficiency bidirectional isolated DC-DC converter across a wide range of power transfer
Author :
Tan, Nadia Mei Lin ; Abe, Takashi ; Akagi, Hirofumi
Author_Institution :
Univ. Tenaga Nasional, Kajang, Malaysia
Abstract :
This paper discusses an optimal operating frequency range and optimal switching dead times for a 6-kW, full-bridge, bidirectional isolated dc-dc converter with focus on improving converter efficiency. The optimal frequency of the dc-dc converter is defined by making its frequency-dependent loss equal to its frequency-independent loss. The maximum efficiency of the dc-dc converter operating at 4 kHz is measured at 98.1% during battery charging and at 98.2% during battery discharging. The converter maintains a high efficiency of more than 97% in a wide range of power transfer.
Keywords :
DC-DC power convertors; battery charging; battery discharging; efficiency 98.1 percent; efficiency 98.2 percent; frequency 4 kHz; frequency-dependent loss; frequency-independent loss; full-bridge bidirectional isolated DC-DC converter; high-efficiency bidirectional isolated DC-DC converter; optimal design; optimal frequency; optimal operating frequency range; optimal switching dead times; power 6 kW; power transfer; Batteries; Bridge circuits; Capacitors; Circuit faults; Frequency conversion; Snubbers; Zero voltage switching;
Conference_Titel :
Power and Energy (PECon), 2012 IEEE International Conference on
Conference_Location :
Kota Kinabalu
Print_ISBN :
978-1-4673-5017-4
DOI :
10.1109/PECon.2012.6450213
