PhD student Dipanjan Das with advisor P. Krein Power delivery to multi-core processors continues to be challenging as transistor sizes and their operating voltages decrease. While core numbers in each processor increase, power requirements remain the same with each new microprocessor generation, and handling transient performance requirements along with efficiency is especially difficult at lower […]
Hardware-in-Loop Implementation of Frequency Regulation Architectures for Islanded Inertia-Less AC Microgrids
PhD student Siddhartha Nigam with advisors A. Domínguez-García and P. Sauer Any collection of interconnected generators and loads capable of islanded operation is generally considered a microgrid. In a prototypical example, a neighborhood comprising homes with rooftop-mounted photovoltaic (PV) arrays, microgrids are typically envisaged to consist entirely of generators that are interfaced through power electronics. […]
Developing a Time-Resolution Based Hierarchy of Models for Distributed Energy Resources
Post-doc Olaoluwapo Ajala with advisor A. Domínguez-García As adoption of distributed energy resources (DERs) has accelerated, so has the need for comprehensive mathematical tools to model such systems. These models are utilized to analyze and control tasks necessary to develop innovative control and coordination technologies. For example, to design and test frequency controllers, models are […]
Solar Variability Reduction Using Off-MPP Tracking and Energy Storage Systems
PhD student Jason Galtieri with advisor P. Krein Maximum power point (MPP) tracking is the standard control scheme for photovoltaic (PV) arrays of all sizes. Inverter tracking algorithms work on second to sub-second time scales and can track most naturally occurring irradiance changes, such as moving cloud coverage. Fast response tracking imposes large power swings […]
Motor Integrated as the Front Wheel of an Electric Motorcycle
MS student Leslie Cheng with advisor K. Haran This project involves sizing and packaging a motor designed to be integrated as the front wheel of an electric motorcycle, as shown in Figure 3. Benefits include enabling all-wheel drive and independent wheel control. The outer-rotor design, sized to minimize weight, uses a Halbach array for the […]
Development of Control Algorithms for an Integrated Generator-Rectifier System
Pd D student Phuc Huynh with advisor A. Banerjee Ac-to-dc power conversion is essential in many emerging applications, including electrified transportation and wind-power generation. For example, an intermediate dc bus is often necessary to connect a variable-speed wind-powered generator to the fixed-frequency ac grid. Similarly, future electric ships are envisioned to have a medium-voltage dc […]
PM-Assisted Synchronous Reluctance Motor as a Compressor Application
MS student Byung Hoon (BH) Min with advisor K. Haran The Grainger Center for Electric Machinery and Electromechanics at the University of Illinois has been collaborating with Prof. Jian-Xin Shen of Zhejiang University (ZJU) on high-speed compressor motor research. BH Min spent one summer month at ZJU to interact with the ZJU team. During this […]
Position Estimation of Outer Rotor PMSM Using Hall-Effect Sensors and Neural Networks
MS student Yuyao Wang with advisor K. Haran Driving and controlling a permanent magnet synchronous machine requires precise knowledge of the rotor’s angular position, such that the voltages and currents can be applied with the right phase difference to extract maximum torque and efficiency from the machine. Conventional sensored methods required attachment of a position […]
High-Efficiency, High-Speed Motor for Compressor Applications
MS student Samith Sirimanna with advisor K. Haran Typically, HVAC systems consume 36% of the total energy requirement for commercial buildings in the USA. Since the major power consumption in an HVAC system lies in the compressor motor, the requirement for having a high-efficiency motor is significant. This project, funded by Johnson Controls International PLC, […]
Mechanical Design of High-Frequency, High Power Density Electric Machines
CEME Collaborator Bulent Sarlioglu with Research Assistant William Sixel, University of Wisconsin-Madison Increasing the power density of electric machines operating in high ambient temperatures is a challenge, as all the materials involved must be rated for operation at those temperatures. To improve cooling in electric machines exposed to temperatures greater than 400°C, a direct winding […]