Yingying Kuai with advisor P.L. Chapman This work develops a comprehensive optimization approach for DC-DC converter under several competing performance demands. The emphasis is to achieve practical design solutions within a short processing time in order to minimize prototyping efforts and eliminate iterative procedure. The study is presented through the context of voltage regulator (VR) […]
AlGaN/GaN metal-oxide-semiconductor high-electron-mobility-transistor with high-quality gate oxide
PhD student Liang Pang with Advisor K. Kim, Thin Film and Charged Particle Research Laboratory AlGaN/GaN metal–oxide–semiconductor high-electron-mobility-transistors (MOSHEMTs) have been extensively investigated for high power microwave and switching applications. Recently, we originated an oxide deposition scheme to deposit high-quality SiO2 on GaN. The fabricated AlGaN/GaN MOSHEMT exhibited a record high breakdown voltage per gate-drain […]
Observer Based Fault Detection for D-STATCOM Systems
Xiangyu Ding with advisor A. Dominguez-Garcia The two-level inverter (six-pulse) circuit is one of the most widely used power electronics circuits for three-phase rectification or inversion. Applications range from inverter systems and motor drives to high voltage direct current (HVDC) systems and flexible ac transmission systems (FACTS). One application is in D-STATCOM systems. D-STATCOM is […]
Observer-Based Fault Diagnosis of Power Electronics Systems
Kieran Levin with advisor A. Dominguez-Garcia Power electronics for automobile drive systems and solar systems may fail before the critical systems that depend on them. To help mitigate the effects of power electronics-caused system failures, a fault detection filter has been implemented to detect both hard and soft faults in the power supply. This filter […]
Power Draw Scheduling of Electric and Plug-in Hybrid Electric Vehicles with Unidirectional Vehicle-to-Grid Benefits
McDavis Fasugba with adviser P. T. Krein Electric vehicles and plug-in hybrid electric vehicles have the potential to offer benefits such as reactive power support and other ancillary services to the power system. This V2G interaction can provide economic benefits for both vehicle owners and utilities. In the V2G concept, information about prevailing system conditions […]
Charging and Chargers for Electric Vehicles/Plug-in Electric Vehicles and their Utility Grid Interaction
Murat Yilmaz, visiting postdoc working with P. T. Krein This study reviews the current status of charging and chargers for electric vehicles (EVs)/plug-in hybrid electric vehicles (PHEVs) and their utility grid interaction. PHEVs and EVs are an area of much interest for researchers because of their attractive properties of reducing gasoline usage and lower greenhouse […]
Direct Torque Control Stability Conditions and Compensation Methods
Veysel T. Buyukdegirmenci with advisor P. T. Krein Our research goal is to obtain a highperformance, well-conditioned induction machine control with wide operating speed ranges. Direct torque control (DTC) gives the least parameter dependency but exhibits erratic behavior under high-speed and highload operation. Algorithms to correct this introduce parameter sensitivity and mismatch. A robust asymptotic […]
Observer-Based Fault Detection of Three-Phase Motor-Drive Systems
Jarod Delhotal with advisor A. Domínguez-García Model-based methods have been applied to fault detection and isolation of linear systems. As switched-linear models can be used for dc-ac converters, we are using these models to develop an observer-based fault detection strategy for inverter-fed drives. A block diagram model of the system is shown in Figure 13. […]
Hardware Validation of Modeling and Design Tools for a Wound-Rotor Sychronous Machine and a Novel Asymmetrical Reluctance Machine
M. Bash, C. Harianto, and Professors S. Pekarek, S. Sudhoff, Purdue University Over the past several years, Purdue has developed design tools for several electric machines, including wound-rotor synchronous machines (WRSMs) and asymmetrical reluctance machines (ARMs). The WRSM design tool has been applied to the electrical sub-system of a 2 kW man-portable power system (MPPS). […]
An Investigation of Active Thermal Capacitance in Electrical Machine Thermal-Mechanical Design
Professors J. Rhett Mayor, School of Mechanical Engineering, and Ron Harley, School of Electrical and Computer Engineering, Georgia Institute of Technology This research considered applying advanced heat transfer techniques to the thermal- mechanical design of high-power density, variable loading electrical machines in order to increase thermal capacitance. The machine thermal capacitance provides a passive ability […]