Grainger CEME

Center for Electric Machinery and Electromechanics

Illini Solar Car

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Illini Solar Car is a multidisciplinary student team who design and build solar cars to race in cross-country solar races such as the World Solar Challenge and the American Solar Challenge. The cross-country races allow students to apply their technical knowledge to build a road-worthy car and provide opportunities for them to learn soft skills […]

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A Four-Level Flying Capacitor Multi-Level Converter for Hybrid Rail and Electric Vehicle Applications

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Andrew Stillwell with advisor R.Pilawa-Podgurski This research explores a bidirectional 4-level flying capacitor multi-level (FCML) converter for high voltage (> 1 kV) step-down/step-up conversion needed in hybrid rail and electric vehicle applications. Previous work achieved similar input voltage requirements through increasing the number of levels in the FCML, at the cost of additional transistors, flying capacitors […]

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Parasitic Parameters Simulation and Measurement for Electric Machine Windings

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CEME Collaborator Professor Julia Zhang and Yanyan Xie – The Ohio State University This project is jointly funded by the Grainger Center for Electric Machinery and Electromechanics (CEME) and Ford Motor Company. The objective is to understand how to calculate and measure the parasitic parameters of electric machine windings in order to model the voltage stress […]

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Distributed and Scalable Electromechanical Actuation for Agile Systems

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Bonhyun Ku with Advisor A. Banerjee Animal-like robots, such as a cheetah robot, require agile movements including running and jumping. Although many animal-like robots have been developed, most have stiff bodies or a passive spine. A stiff body structure limits the robot’s balance and agile movements. Actual cheetahs have a flexible spine structure, which allows […]

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Integrated Motor Drive Using Paralleled GaN HEMTs on Extreme Copper Printed Circuit Boards for High Temperature Operation

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CEME Collaborator Professor Bulent Sarlioglu with Research Assistant Woongkul Lee – University of Wisconsin-Madison Compact and energy-efficient integrated motor drive (IMD) applications require a high-power-density inverter. A gallium nitride (GaN) high electron mobility transistor (HEMT) has a lateral device structure with a land-grid array or ball-grid array package for minimum parasitic inductance and resistance, as well […]

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Developing a Standardized Method for Measuring and Quantifying Dynamic On-State Resistance via a Survey of Low Voltage GaN HEMTs

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Thomas Foulkes with advisers Prof. Nenad Miljkovic and Prof. Robert Pilawa-Podgurski Designing and optimizing high frequency, ultra-efficient converters requires detailed knowledge of the behavior and parasitic parameters for both active and passive components. Recently, wide-bandgap transistors have enabled simultaneous expansion in both switching frequency and efficiency due to higher maximum operating junction temperature limits, lower […]

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Differential Power Processing for Voltage Regulation of Series-Stacked Processor Cores

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Dipanjan Das with advisor P. Krein Power delivery to multi-core processors is becoming increasingly challenging with decreasing transistor sizes and, thereby, their operating voltages. With the increase in core number in each processor, the power requirements tend to remain the same with each new generation of microprocessors, and handling transient performance requirements along with efficiency […]

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Quantifying Uncertainties in Electric Machine Design

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CEME Collaborators Dionysios Aliprantis (ECE) and Ilias Bilionis (ME) ­– Purdue University The uncertainty in the magnetic properties of steel, as exhibited by the B-H curve, is induced by variations in the manufacturing process and/or the supply chain. This uncertainty affects the rotor and stator of permanent magnet synchronous machines (PMSM) and consequently the output […]

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Investigation of Switched Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems

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Shivang with Advisor Prof. Arijit Banerjee Turboelectric propulsion systems are considered a critical enabler for low-carbon emission in the aircraft industry. Unlike hybrid-electric and all-electric systems, these use no batteries for propulsive energy during any flight phase. Since batteries with high power capacity and specific power required for commercial aircraft are unlikely to be developed […]

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Aircraft Electrification

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Aaron Anderson with adviser K. Haran This research, funded by Rolls-Royce, considered the challenges of integrating an electric machine into a concept gas-turbine engine. Results were presented at the AIAA/IEEE Electric Aircraft Technologies Symposium (EATS) in July. The presentation included an analysis of how components besides the motor influence the drive-system performance. The conclusion is that […]

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