Kaushik Rajashekara

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—Fuzzy logic-based on-line efficiency optimization control has been described in the literature [1] for an indirect vector-controlled induction motor drive. The purpose of this paper is to extend the same control to a stator flux-oriented electric vehicle induction motor drive and then implement the fuzzy controller by a dynamic back propagation neural(More)
Preface The results presented in this thesis have been elaborated during my time at the " Laboratoire d'Electronique Industrielle " directed by Prof. A. Rufer. The project was financed through support from the Swiss Federal Office of Energy. I would like to take this opportunity to express my gratitude to everyone who contributed to making it all possible.(More)
Efficient power conversion technologies are strategic to the advancement of fuel cell vehicles (FCVs). This paper presents an overview of power conditioning system (PCS) architectures for an FCV propulsion system. Two new power conversion topologies to obtain variable ac from the fuel cell system are proposed. The switching of the power devices are based on(More)
THE MARKET FOR INTEGRATED power systems for more electric aircrafts and, in particular, for unmanned air vehicles (UAVs) is rapidly developing [1]. Due to space constraints, a practical solution for UAVs is to employ electric-starter generators (ESGs) embedded in gas turbine engines to facilitate electric engine crank, assist the engine in reaching the(More)
This paper presents a novel hybrid packaging structure for high-temperature SiC power modules that combines the benefits of the wirebond packaging structure and the planar packaging structure. With the proposed hybrid structure, the power modules can achieve the same footprint and similar parasitic to planar structures but with a much easier fabrication(More)
Of all the electric machine types, conventional automotive belt-driven Lundell generators, and electrically-excited or hybrid permanent magnet-electrically excited synchronous salient pole generators are the only types that can utilize inexpensive control electronics consisting of a passive three-phase diode bridge and a simple, one power switch voltage(More)