Showing papers by "Juan Carlos Balda published in 2000"

Sizing a switched reluctance motor for electric vehicles

Abstract: This paper proposes a methodology to determine the peak and continuous power ratings of a switched reluctance motor (SRM) used for the electric propulsion of an Electric Vehicle (EV). The input data consist of the EV main specifications (e.g., rated and maximum velocities, vehicle mass, city and highway driving schedules, etc.). Estimation of the variations of copper and core losses with vehicle speed and motor output power is necessary to calculate the SRM continuous power rating. These loss variations are estimated by taking into account the operation principles of SRMs and assumed (or known) loss values at only one operating point. Using the obtained expressions, the SRM efficiency contours can be then estimated before the SRM is actually designed and built. This paper shows that the thermal duty of the SRM can be reduced by appropriate choice of the individual loss components in the design process.

Modeling Switched Reluctance Motors under Multi-Phase Excitation, Part 1

Abstract: : Part 1 of 3 of the Second Annual Report covers "modeling" activities performed under task (b) - "Design of the SRM" of this ONR Grant. This Part 1 has been divided into three sections. Section A evaluates different modeling techniques for Switched Reluctance Motors (SRM) operating under single-phase excitation. Section B analyzes two specific techniques for single-phase excitation; namely, the gage curve and look-up-table' modeling techniques. Finally, Section C addresses two specific techniques for multi-phase excitation of SRM; one technique is based on the look-up-table' used for single-phase excitation, and the other implements an Artificial Neural Network to predict the flux linkage and electromagnetic torque.

Curriculum restructure to answer critical needs in packaging for energy efficiency/renewable energy systems, wireless, and mixed-signal systems areas

Abstract: The Electrical Engineering Department at University of Arkansas has been building considerable strength in Energy Efficiency/Renewable Energy Systems, Mixed-Signal, and Wireless Packaging areas. This effort is in coordination with critical other Departments within the College of Engineering; specifically Industrial Engineering and Mechanical Engineering Departments, in addition to the Physics Department within the College of Arts and Science. The High Density Electronics Center (HiDEC), established in 1992 with DARPA funds to conduct research on advanced electronic packaging technologies, enables the educators to interact within the various disciplines to achieve the set objectives of packaging in these areas. The paper will outline the mission of each area, the vision and objectives of the administration, the technical issues to be addressed, the technological challenges and barriers for the Department to face and overcome to make this vision a true reality, and the curriculum restructure. The paper will also outline how critical these strategic areas are for a national academic institution recognition and fulfillment of critical needs for our nation's global competitiveness.