Title :
Efficiency optimized AC charging waveform for GaN bidirectional PHEV Battery Charger
Author :
Lingxiao Xue ; Mattavelli, Paolo ; Boroyevich, Dushan ; Hughes, Brian ; Burgos, Rolando
Author_Institution :
CPES, Virginia Tech, Blacksburg, VA, USA
Abstract :
Sinusoidal charging can boost the power density of GaN-based battery charger with the penalty of dropped efficiency due to hard-switching. In this paper, different AC charging waveforms are investigated to achieve better charger efficiency with slightly increased DC link capacitance. It turns out that PWM-zero-off charging, which shut down DC/DC stage at zero part of the charging current waveform, can greatly reduce converter loss while keeping small DC link voltage ripple. Experiment results from GaN prototype verified the concept and 39% loss saving is demonstrated.
Keywords :
III-V semiconductors; PWM power convertors; battery chargers; battery powered vehicles; gallium compounds; hybrid electric vehicles; optimisation; switching convertors; wide band gap semiconductors; AC charging waveform; DC link capacitance; DC link voltage ripple; GaN; PWM-zero-off charging; bidirectional PHEV battery charger; charging current waveform; converter loss; power density; sinusoidal charging; Batteries; Battery chargers; Capacitance; Capacitors; Gallium nitride; Loss measurement; Power generation; Battery charger; Gallium Nitride (GaN); High power density systems; Single phase system; Wide bandgap devices;
Conference_Titel :
Power Electronics and Applications (EPE'14-ECCE Europe), 2014 16th European Conference on
Conference_Location :
Lappeenranta
DOI :
10.1109/EPE.2014.6910869
