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Abstract
A fully soft-switched bidirectional converter to interface an ultra-capacitor (UC) and a battery is proposed. The proposed converter acts as a buck zero current transition (ZCT) to charge the UC and acts as a boost zero voltage transition (ZVT) to discharge the UC. The ZVT and ZCT techniques guarantee soft-switching condition for all power switches. The proposed converter has high efficiency (above 95%), requires fewer components and has a small footprint. The analysis of the switching technique is validated by simulation. In addition, a 100 W experimental converter is constructed. The results from simulation and experiment are in good agreement with each other.
Additional information
Notes on contributors
A.M. Noghlbary
Amin Mirzaei Noghlbary received his BS degree in electrical engineering from the Power and Water University of Technology, Tehran, Iran, in 2005 and MS degree in electrical engineering from the Isfahan University of Technology, Isfahan, Iran, in 2008. He is currently working toward his PhD degree in electrical engineering in Universiti Teknologi Malaysia, Johor Bahru, Malaysia. His current research interests include soft switching techniques in DC-DC converters.
H. Farzanehfard
Zainal Salam obtained his BSc, MEE and PhD degrees from the University of California, Universiti Teknologi Malaysia (UTM) and University of Birmingham, UK, in 1985, 1989 and 1997, respectively. He has been a lecturer at UTM for 24 years and is now a Professor in Power Electronics at the Faculty of Electrical Engineering. He has been working in several research and consulting works on battery powered converters, solar energy and machine control. Currently he is the Director of the Inverter Quality Control Center (IQCC) at UTM, which is responsible for testing photovoltaic inverters that are to be connected to the local utility grid. His research interests include all areas of power electronics and renewable energy.