A5074066680- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- HVDC Systems and Fault Protection
- Microgrid Control and Optimization
- Silicon Carbide Semiconductor Technologies
- Nuclear Materials and Properties
- Nuclear materials and radiation effects
- Electric Motor Design and Analysis
- Radioactive element chemistry and processing
- High-Voltage Power Transmission Systems
- Fusion materials and technologies
- Sensorless Control of Electric Motors
- Cardiac Structural Anomalies and Repair
- Wireless Power Transfer Systems
- Induction Heating and Inverter Technology
- Plasma Diagnostics and Applications
- Electromagnetic Compatibility and Noise Suppression
- Social Robot Interaction and HRI
- Advanced Wireless Network Optimization
- Engineering Education and Pedagogy
- Sleep and Wakefulness Research
- Focus Groups and Qualitative Methods
- Environmental Engineering and Cultural Studies
- AI in Service Interactions
- Industrial Vision Systems and Defect Detection
University of Wisconsin–Madison
2013-2024
Portland State University
2021-2024
Vellore Institute of Technology University
2017-2023
Teachers Development Group
2023
Concordia University
2023
Eskom (South Africa)
2023
University of Nottingham
2023
DuPont (United States)
2023
S&C Electric Company (United States)
2023
University of Calgary
2023
Empathy is the ability to share someone else’s feelings or experiences; it influences how people interact and relate. Socially assistive robots (SAR) are a promising means of conveying eliciting empathy toward facilitating human-robot interaction. This work examines factors that influence amount elicited by SAR storyteller users’ perceptions robot. We conducted an empirical mixed-design study (N=46) using autonomous told three stories, each with different human robot target empathy. The used...
Three-phase voltage-source inverters typically feature a significant amount of dc energy storage to maintain stiff bus. In these cases, the dc-link capacitor is sized store enough several tens cycles ac output at rated power. this paper, we propose reduce size dramatically provide just one high-frequency switching cycle The bus no longer stiff, and hence, classical sinusoidal pulse-width modulation cannot be used. However, stored (SEM) proposed herein synthesizes high-quality voltage...
Background: Human trafficking for sexual exploitation (referred to as sex trafficking) is a complex global challenge that causes harm and violates human rights. Most research has focused on victim-level harms experiences, with limited understanding of the networks business functions operations. Empirical evidence lacking how disrupt operations because it difficult study; hidden dangerous, spans academic disciplinary boundaries, necessitates ways knowing include lived experience....
The operation and maintenance activity of off‐shore wind turbines (WTs) increases the cost generated energy. Although significant efforts have been made to improve reliability mechanical subassemblies, electrical electronic subassemblies fail more frequently, causing undesirable downtimes loss revenues. Since WTs wave energy converters (WECs) share WECs is expected be affected by same causes. This study presents a robust model predictive control for WEC consisting an oscillating water column...
Cascaded dc voltage link power converters typically employ a significant amount of energy storage at the intermediate link. The bus is assumed to be stiff enough provide decoupling between source and load, allowing dynamic regulation functions implemented load terminals independently. In these cases, size capacitance dictated by requirements steady-state ripple voltage, current rating, ride-through considerations, and, more importantly, overshoot during transients. Design tradeoffs in...
During IGBT breakdowns, the grid side converter (GSC) of a renewable power plant must be disconnected from grid. In recent past, topological modifications propose faulty phase to connected midpoint dc bus as solution. this configuration, can generate only four vectors. Moreover, since capacitor voltages carry voltage ripple at frequency, magnitude and angle vectors become variable during post-fault scenarios. The model predictive control (MPC) approaches select used in cost function based on...
To gain an understanding of gas bubble transport in oxide nuclear fuel, this paper uses polycrystalline CeO2, composed both nanograins and micrograins, as a surrogate material for UO2. The CeO2 was implanted with 150-keV Kr ions up to dose 1 × 1016 ions/cm2 at 600°C. Transmission electron microscopy characterizations small bubbles nanograin micrograin regions were compared. grain boundary acted efficient defect sink, evidenced by smaller lower density the region compared region.
Oscillating Water Column (OWC) is one of the most well-known wave energy converter (WEC). Typically, OWCs are installed in rocky shores or custom-built breakwaters. However, since profile more favorable an open sea, it can also be a point absorber order to increase extraction. This paper presents development new dual Multivector Model Predictive Control (MMPC) for power converters floating OWC WEC. The fast dynamic response featured by proposed MMPC has proven very suitable deal with highly...
Three phase voltage source inverters typically feature a significant amount of dc energy storage to maintain stiff bus. In these cases, the link capacitor is sized store enough several tens cycles ac output at rated power. this paper, we propose reduce size dramatically, provide just one high frequency switching cycle The bus no longer and hence classical sinusoidal pulse width modulation cannot be used. But, stored (SEM) concept that herein synthesizes quality waveforms even with such tiny...
Today's semiconductor devices are accompanied by high switching frequencies ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$>$</tex-math></inline-formula> kilo-hertz) and small transition times notation="LaTeX">$< $</tex-math></inline-formula> micro-seconds). Such fast undesirable effects such as voltage overshoots at the load terminals, ground leakage currents, wide-band electromagnetic noise, etc....
Three-phase DC/AC power converters enable several applications including photovoltaic systems, electric traction inverters, uninterruptible supplies, and utility systems. The classical three-phase voltage source inverter (VSI) topology featuring a single-pole double throw switch per-phase, which forms the workhorse of these applications, can operate in only buck mode operation. Increasing number transformer-less battery cells, fuel motors require wide range input output range. Hence,...
High-Voltage Direct-Current (HVDC) systems are an attractive solution for long distance power transmission. Among the various types of converters, Modular Multilevel Converter (MMC) has been identified as a modern converter choice HVDC systems. Also, have used widely and it is essential to conduct studies on field DC-side faults which considered big challenges in technology. Not only impacted DC side but also AC system's stability entirely affected. In this paper, novel protective scheme...
Adjustable speed drives for induction motors that operate with V/Hz control are commonly used high efficiency fan and pump applications where accurate torque is not critical. While most of these use a passive rectifier to interface the three phase ac line, active front end converters improve power quality input waveforms increasingly common. In applications, dc link capacitor typically realized using electrolytic capacitors form bulk converter volume. The sized store enough energy maintain...
Modular Multilevel Converters (MMC) are traditionally used in high‐power applications although their field of application has lately widened to lower powers. In medium and low‐power such as electric drives, a fast control system is usually required model‐based predictive approaches (MPC) highly suitable obtain superior performance. Unfortunately, MPC widely with two‐level three‐phase power converters, typically motor generator applications, it been barely developed for MMC. Recent studies...
While the past decade has seen a widespread adoption of power electronics curriculum at various university electrical engineering programs, authentic laboratory experiences for students remains to be challenge inclusion in programs. This paper discusses modular learning platform called PEGO. PEGO consists self-contained two terminal building blocks converters which may cascaded stage by achieve an overall functional objective. The system been developed complement lecture based design...