Kaushik Rajashekara

Kaushik RajashekaraKaushik Rajashekara received his PhD (1984) degree in Electrical Engineering from Indian Institute of Science. In 1989, he joined Delphi division of General Motors Corporation in Indianapolis, IN, USA as a staff project engineer. In Delphi and General Motors, he held various lead technical and managerial positions, and was the chief scientist for developing electric machines, controllers, and power electronics systems for electric, hybrid, and fuel cell vehicle systems. In 2006, he joined Rolls-Royce Corporation as a Chief Technologist for More Electric Aircraft architectures and power conversion/control technologies for gas turbines in aero, marine, defense, and energy applications. Since August 2012, he is a Distinguished Professor and Endowed Chair in Erik Jonsson School of Engineering and Computer Science at the University of Texas at Dallas. He also holds honorary Qiushi Chair Professor in Zhejiang University, China.

Prof. Rajashekara has published more than 140 papers in international journals and conferences, and has over 40 patents. He has given more than 100 invited presentations in international conferences and universities. He has co-authored one IEEE Press book on sensorless control of ac motor drives and contributed individual chapters to six published books.

Prof. Rajashekara was elected as Member of the U.S. National Academy of Engineering for contributions to electric power conversion systems in transportation. He was also elected as Fellow of the National Academy of Inventors. He is the recepient of the IEEE Richard Harold Kaufmann award for outstanding contributions to the advancement of electrical systems in transportation; IEEE Industry Applications Society Outstanding Achievement Award, and IEEE IAS Gerald Kliman award (2006) for contributions to the advancement of power conversion technologies through innovations and their applications to industry. He is a Fellow of IEEE and a Fellow of SAE International.

 

Title 1: Flying Cars – Challenges and Propulsion Strategies

The technology and interest in the flying cars is as old as airplanes and automobiles. However with the rapid advancement and commercialization of airplanes and automobiles, and with many technical challenges associated with flying cars, the interest in flying cars declined. In recent years, with the advances in technology of engines, electric motors, power converters, and communications, there is an increasing interest in flying vehicles and more electrification of these vehicles. Several companies are already developing these vehicles with the intent of commercialization. In this presentation, the history of flying cars including some of the on-going developments will be presented. The technical challenges, particularly related to lift and propulsion, and the problems related to making it a wide scale adoption will be discussed. The challenges, requirements of developing a hybrid or a pure electric flying car, and propulsion strategies for operating like an automobile, airplane with vertical take-off and landing will also be presented.

 

Title 2:Converging Technologies for Electric/Hybrid Vehicles and More Electric Aircraft Systems

The aerospace industry is facing challenges similar to those of the automotive industry in terms of improving emissions, fuel economy, and cost. Another similarity is the move toward replacing mechanical and pneumatic systems with electrical systems, thus transitioning toward “more electric” architectures. To meet these challenges in the automotive industry, significant work has been done in the areas of electric, hybrid, and fuel cell vehicles. In the case of airplanes, more electric architecture is the emerging trend. The intent is to move as many aircraft loads as possible to electrical power, resulting in simpler aircraft systems leading to the potential for lower fuel consumption, reduced emissions, reduced maintenance, and possibly lower costs. Electric-powered environment control systems (ECS), electrical actuators, electric de-icing, etc. are some examples of aircraft systems under consideration. Electric starting of the engine and the conversion of all the pneumatic and hydraulic units on the accessory gearbox (AGB) to an electric system are also being investigated. This presentation examines the synergies between the electrical components for electric/hybrid vehicles and more electric aircrafts systems and how the technology of the components being developed for these systems are converging to be modular, more efficient, smaller size, lower weight, and capable of operating over a wide temperature range. Also, fuel cells for APU applications will also be discussed.

 

Title 3:Fuel Cell Systems for Transportation

With the requirements for reducing the emissions and improving the fuel economy, the automotive companies are developing electric, hybrid, and fuel cell vehicles. Fuel cell based vehicles are already in demonstration phase. Fuel cells are also being considered for on-board power generation in, trucks, airplanes, and ships. In this presentation, different fuel cell technologies are examined for transportation and for on-board power generation applications. The proton exchange membrane (PEM) fuel cell based propulsion system architectures for fuel cell vehicles will be presented in detail and the control characteristics will be discussed. The operating strategies of fuel cell vehicles with the associated power conversion, control architectures, and integration with the battery will also be explained. The status of fuel cell systems, specifications of few of the existing fuel cell vehicles, and the future strategies will be presented.

 

Title 4:Power Conversion for More Electric and Hybrid Aircraft

The More Electric Aircraft (MEA) and Hybrid Electric Aircraft technologies are continually evolving and are being widely considered as the future technology for the aerospace industry. The main objectives are to obtain high power and volume density, high efficiency, reliability, and ability to withstand harsh environments. The pneumatic and hydraulic systems are being replaced by electrical systems. Power Electronics and efficient electric machines are enabling technologies for the advancement of these new generation electric aircraft systems. This presentation provides a brief description of the electrical power generation, conversion, and distribution in conventional aircrafts and in more electric aircrafts such as Airbus 380 and Boeing 787. More electric architectures, power distribution strategies, more electric engine concepts, and the effect of high voltage operation at high altitudes will also be discussed.

 

Title 5:Current and Future trends in Transportation Electrification- Automotive and Aerospace Systems

The transportation industry is facing challenges in terms of reducing emissions, improving fuel economy, meeting the demand of increasing electrical loads, and reducing the cost. Almost every auto manufacturer is working on the development of new generation of electric/hybrid and fuel cell vehicles. In the case of airplanes, more electric architecture is the emerging trend, and in a long term even electric/hybrid airplanes are being examined Also, there will be an exponential growth in electrical power demands in transportation systems. “More electric” is a technology enabler for power generation, energy storage, conversion systems, and other technologies. In this presentation, the current trends in the technologies of electrification of automobiles and airplanes will be discussed, and the future strategies for improving the efficiency and lowering the emissions will be presented. The synergies between the electrical components for different modes of transportation and how the technology of the components being developed for these systems are converging to be modular, more efficient, smaller size, lower weight, and capable of operating over a wide temperature range will also be examined.

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