PhD student Peter Xiao with Advisor K. Haran Superconducting machines have great advantages in specific power in high power applications. A major challenge lies in thermal management of the rotational cryogenic region, as traditional liquid-cryogen is limited by the transfer-coupler. The Stirling-cycle cryocooler is an ideal cooling device for lightweight superconducting rotors due to its […]
The Solution to 90% of Passenger EV Charging Needs
MS student Raya Mahony with Advisor P. Krein When addressing the challenges of electric vehicle (EV) charging infrastructure, it’s critical that we don’t force the solution to dwell on edge cases. Level 1 charging is more than adequate for almost all drivers almost all the time. According to the US department of Transportation, the average […]
Variable-Pole Induction Machines Drives for Electric Vehicles
PhD Student Elie Libbos with Advisor A. Banerjee Induction machines (IM) are an attractive permanent magnet-free solution for electric vehicle drivetrains with distinct advantages such as low cost, reliability, and capability to withstand high short-term overload. Induction machines can operate at a much higher temperature when compared to permanent-magnet-based machines without the risk of demagnetization. […]
Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
PhD student Shivang with Advisor Prof. Arijit Banerjee A brushless doubly-fed machine (BDFM) is an attractive option for megawatt-scale turbo-electric propulsion systems due to use of a partially-rated power converter, reduced maintenance, and absence of permanent magnets. However, BDFRMs have inherently poor torque density and high torque ripple because of using a sub-optimal rotor. We […]
Handheld MRI Rotational Spatial Encoding and Deep-Learning Priors
MS student Yaokun Shi with Advisor K.Haran Funded by the Grainger CEME, the handheld MRI device utilizes a novel approach compared to other portable MRI devices by replacing the conventional C-shaped or solenoid magnet with two diametrically magnetized cylindrical magnets that are capable of individually rotating. This unique spatial encoding creates a non-homogeneous magnetic field […]
Computational tools for differentiable multi-physics electric machine models
Andrés Beltrán-Pulido, Sihun Kim, Dionysios Aliprantis (Elmore Family School of Electrical & Computer Engineering, Purdue University) Ilias Bilionis (School of Mechanical Engineering, Purdue University) This research project aims to develop a computational framework for differentiable multi-physics electric machine (EM) models, which can enable more efficient and accurate modeling, analysis, and design for various applications (e.g., […]
On-state resistance characterization for SiC MOSFETs
Silicon Carbide (SiC) MOSFETs are being widely adopted in the industry as a viable substitute for conventional power transistors, due to their superior figure-of-merit and compact, efficient power conversion. However, the relatively novel manufacturing technology of these devices raises further questions regarding long-term reliability, as SiC devices have been known to suffer from degradation over […]
Hybrid Switched-Capacitor Converter for Data-Center Power Delivery
PhD student Aria Delmar with Advisor Dr. Andrew Stillwell Delivering power to processors in data centers presents the challenge of completing a high-conversion step-down to a low voltage (1 or 2V) for a given power demand (100-200W). It is desirable to design a power converter capable of delivering high-current power, while being very close physically […]
Improved Motor Performance and Longevity with Ceramic Insulation
MS student Brain Wolhaupter with Advisor K. Haran This research is focused on boosting the longevity and performance of high-power density motors by enhancing heat extraction from the stator windings through increasing use of ceramics in the stator. The two largest thermal barriers in the stator are the potting compound (typically an epoxy) and the […]
Control architecture for LLC resonant converter
PhD student Anuj Maheshwari with Advisor K. Haran An LLC series resonant dc-dc converter is an attractive solution for the dc-dc conversion stage in many applications, including battery charging, solar energy harvesting, and LED driver, due to its high efficiency and power density, and low electromagnetic interference over a wide load range. The controller design […]