Monday, 1 July 2013
Tiwari Receives Outstanding Graduate Teaching Assistant Award
Devesh Tiwari
Devesh Tiwari, a teaching assistant and PhD student in the Department of Electrical and Computer Engineering at NC State University, has received an Outstanding Graduate Teaching Assistant Award.
The Outstanding Graduate Teaching Assistant Awards serves as the primary university-level forum for recognizing exceptional contributions made by Graduate Teaching Assistants to the educational excellence of the University. This annual event is a celebration of excellence in graduate student teaching in the laboratory and classroom. The UGSA Teaching Effectiveness Committee invites the Directors of Graduate Programs (DGPs) to nominate a small number of TAs that exemplify outstanding teaching and mentoring and go beyond what is required of them. All departments are encouraged to participate so that their students receive the recognition they deserve.
Tiwari taught a section of ECE 209 in Fall 2012 and was mentored by Dr. Greg Byrd.
The award ceremony was held on March 18, 2013 at the McKimmon Center.
Mikail Wins 2nd Place at Graduate Student Research Symposium
Rajib Mikail
Rajib Mikail, a 5th year doctoral student in the Department of Electrical and Computer Engineering at NC State University, won 2nd place in the 8th Annual Graduate Student Research Symposium. The symposium was held on March 19 at the McKimmon Center and was open to any graduate student from NC State. This year's symposium featured over 200 posters.
Mikail is a part of the Future Renewable Electric Energy Delivery and Management (FREEDM) Systems Center and is being advised by Dr. Iqbal Husain.
This research project was funded by Nexteer Automotive, Saginaw, MI.
Rajib's research was on "Switched Reluctance Machine (SRM) for Electric Power Steering Application".
Rajib Mikail's Poster
Abstract: Power steering creates the necessary torque assist for the driver while rotating the steering wheel. Electric motor is recently used in power steering for better steering feel. To meet the torque ripple and noise level according to the standard specification is a challenging step for power steering system design. Non-permanent magnet machines are the key focus of researchers and industries due to the cost and availability issues of rare earth permanent magnet. SRM is the only non-permanent magnet machine which is highly reliable and inherently fault tolerant for steering application. With the current design and control technology, SRM has unsuitable torque ripple and acoustic noise for steering application. In this project the machine was redesigned and a new controller algorithm is proposed and implemented experimentally to achieve the required torque ripple and noise performance. A novel current profiling approach covering the speed range of operation is proposed. In addition to the current profiling method a predictive current control method is analyzed to follow the current profiles with minimum error and desired switching frequency. With the achieved improvement SRM can be used on other torque ripple sensitive high performance applications.