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Electrical and Computer EngineeringConcordia University, Montreal, QC, Canada
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Akshay Kumar Rathore received the M.Tech. degree in Electrical Machines and Drives from the Indian Institute of Technology (BHU), Varanasi, India, in 2003 and Ph.D. degree in Power Electronics from University of Victoria, Victoria, BC, Canada, in 2008. He had two Postdoctoral Research Appointments with the University of Wuppertal, Germany, and University of Illinois at Chicago, IL, USA. He was an Assistant Professor in Electrical and Computer Engineering, National University of Singapore. He is currently an Associate Professor at in Electrical and Computer Engineering, Concordia University, Canada.
He has published more than 200 research papers in international journals and conferences including 73 IEEE Transactions. His research is mainly focused on current-fed converters and multilevel inverters.
He received the Gold Medal during his M.Tech. degree for securing highest academic standing among all electrical engineering specializations. He received the 2013 IEEE IAS Andrew W. Smith Outstanding Young Member Achievement Award, 2014 Isao Takahashi Power Electronics Award, and 2017 IEEE IES Davin Irwin Early Career Award.
He is an Associate Editor of IEEE Transactions on Industrial Electronics, IEEE Transactions on Industry Applications, IEEE Transactions on Transportation Electrification, IEEE Journal of Emerging Selected Topics in Power Electronics and an Editor of IEEE Transactions on Sustainable Energy and IEEE Transactions on Vehicular Technology. He served as paper review chair for Industrial Automation and Control in IEEE Transactions on Industry Applications. He is currently Prominent Lecturer and Executive Board Member-at-Large of IEEE Industry Applications Society and was Distinguished Lecturer for 2017-18. He has served and has been serving several technical committees and conference organizing committees in various roles.
Snubberless Naturally-Clamped Soft-Switching Current-fed DC-DC Converters
Bidirectional dc/dc converters are required for energy storage and dc microgrid applications. Current-fed converters offer inherent voltage gain, short circuit protection and current limiting features, and are suitable for such applications. However traditional drawback of voltage spike at turn-off across the semiconductor devices has limited the use the current-fed topologies. Conventionally, dissipative/passive snubbers or active-clamping circuits have been adopted to address this problem. However, such circuits introduce complexity, reduce efficiency, and compromise on original boost capacity of the converters. Low peak and circulating current through the devices are limited than conventional current-fed and voltage-fed PWM and resonant converters. It, therefore, delivers higher efficiency. Snubberless Naturally Clamped Current-fed Converters refer to a new class of converters with a newly developed modulation scheme that solves this traditional problem without any additional snubber or auxiliary clamp circuit while preserving the boost capacity and circuit originality. This newly invented modulation technique has been implemented on single-phase, three-phase, and interleaved topologies and demonstrated the attributes of natural voltage clamping and zero current commutation of semiconductor devices along with soft-switching. This class of converters will open scope for current-fed converters in industries. It is a fixed frequency duty cycle modulation and only a series inductance value between source and load needs to be designed. The attributes are maintained with variation in source voltage and load current.