## Past Motor Design, Operation, and Control Projects

Motor design today can be performed at the system level, taking into account particular operating requirements, the load, and control opportunities. At the CEME, we seek answers to fundamental questions about the best use of materials, opportunities for new control concepts, and innovations in manufacturing. Improved steels, superconducting materials, permanent magnets, cooling technologies, insulation materials, manufacturing processes, modeling and simulation, and control methods are at the heart of revolutionary changes in electric machinery. Motors designed to operate specifically with electronic controls are opening new possibilities. We are developing ways to make motors more efficient, more powerful, smaller, easier to build, and well matched to their applications.

## 2023-2024

- A 7-Level Interleaved Hybrid Active-Neutral-Point Clamped Converter for High-Frequency Low-Inductance Motors
- AC Loss Modeling and Active Shielding of Superconducting Machines
- Assessing Reliability of a SiC MOSFET During Converter Operation
- Current-Sourced Hybrid Switched Capacitor Converter for Data Center Power Delivery
- Modeling and Dynamic Control of a Novel Converter for Data Center Power Delivery

## 2022-2023

- Analysis of magnet losses due to slot harmonics in surface-mount permanent magnet synchronous motor
- Control architecture for LLC resonant converter
- Hybrid Switched-Capacitor Converter for Data-Center Power Delivery
- Improved Motor Performance and Longevity with Ceramic Insulation
- On-state resistance characterization for SiC MOSFETs

## 2021-2022 Interim

- Ac Loss Measurement Test Bench for Measuring ac Losses in Superconducting Cables Under Transverse Rotating Magnetic Field (20-K, ¬1-T, 0–150 Hz)
- Additive Manufacturing for Rapid Prototyping and Active Cooling
- Analysis & Optimization of Electric Propulsion Systems for Aircraft Applications
- Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
- Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
- Component Tests of a Cryogenic, Liquid Hydrogen Based Heat Exchanger for a Superconducting Motor
- Electromagnetic Modeling and Optimization of Inverter-Driven, High-Frequency, Slotless Permanent Magnet Synchronous Machines
- Investigation of magnet loss in an interior Permanent magnet motor
- Low-Cost Rapid Wide-range Adaptive Drives Using Arduino and FPGA
- Superconducting rotor torque-transfer mechanism with low thermal conductivity

## 2021-2022

- Ac Loss Measurement Test Bench for Measuring ac Losses in Superconducting Cables Under Transverse Rotating Magnetic Field (20-K, ¬1-T, 0–150 Hz)
- Additive Manufacturing for Rapid Prototyping and Active Cooling
- Analysis & Optimization of Electric Propulsion Systems for Aircraft Applications
- Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
- Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
- Component Tests of a Cryogenic, Liquid Hydrogen Based Heat Exchanger for a Superconducting Motor
- Electromagnetic Modeling and Optimization of Inverter-Driven, High-Frequency, Slotless Permanent Magnet Synchronous Machines
- Investigation of magnet loss in an interior Permanent magnet motor
- Low-Cost Rapid Wide-range Adaptive Drives Using Arduino and FPGA
- Superconducting rotor torque-transfer mechanism with low thermal conductivity

## 2020-2021 Interim

## 2020-2021

## 2019-2020 Interim

## 2019-2020

- Analysis and Experimental Validation of Superconducting-Machine Technologies for Hydrogen-Powered Electric Aircraft Propulsion
- Co-design of an Integrated Direct-Drive Electric Motor and Ducted Propeller for Aircraft Propulsion
- Design of a Hydrogen-Based Cooling System
- Design of Low-Inductance Generator for Large-Scale Wind Turbines
- Electromagnetic Losses Modeling in a High Power, High Frequency Permanent Magnet Machine Considering Power Electronics Drive Switching Harmonics
- Hydrogen-Based Cooling System for a Fully Superconducting Machine
- Maximum Power-Point Tracking for an Integrated Generator-Rectifier System
- Structural Design and Validation of a 10 MW Off-Shore Wind Turbine
- Superconducting Machine for Hydrogen-Powered Electric Aircraft Propulsion

## 2018-2019 Interim

- Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
- High-Efficiency, High-Speed Motor for Compressor Applications
- Insulation Design and Qualification for Form-Wound Air-Core Armature Windings in High-Frequency Machines
- Mechanical Design of High-Frequency, High Power Density Electric Machines
- PM-Assisted Synchronous Reluctance Motor as a Compressor Application
- Position Estimation of Outer Rotor PMSM Using Hall-Effect Sensors and Neural Networks
- Trunnion Effect on a PMSM with External Rotor Designs

## 2018-2019

- A Fully Superconducting Air-Core Machine for Hydrogen-Powered Electric Aircraft Propulsion
- Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
- Ceramic 3D Printed Direct Winding Heat Exchanger for High Ambient Temperature Operation of Electric Machines
- Data Driven Approaches to Fault Tolerant Operation of Electric Machines
- Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
- High-Efficiency, High-Speed Motor for Compressor Applications
- Insulation Design and Qualification for Form-Wound Air-Core Armature Windings in High-Frequency Machines
- Magnetic Gears for Aerospace Applications
- Mechanical Design of High-Frequency, High Power Density Electric Machines
- Multi-Physics Optimization of High-Frequency Air-Core Permanent-Magnet Motor for Aircraft Applications
- PM-Assisted Synchronous Reluctance Motor as a Compressor Application
- Position Estimation of Outer Rotor PMSM Using Hall-Effect Sensors and Neural Networks
- Trunnion Effect on a PMSM with External Rotor Designs

## 2017-2018

- Aircraft Electrification
- Current-control dynamic response and stability analysis in high-speed permanent magnet synchronous machines based on complex state variables
- Investigation of Switched Brushless Doubly-Fed Reluctance Machines for Turboelectric Distributed Propulsion Systems
- Multi-Physics optimization of high-frequency air core permanent magnet motor for aircraft applications
- Quantifying Uncertainties in Electric Machine Design
- Stator assembly and qualification of 1MW high speed permanent magnet synchronous motor

## 2016-2017 Interim

- A Five-Level Flying Capacitor Multi-Level Converter with Integrated Auxiliary Supply
- AC Loss in Fully Superconducting Electric Machines
- Active Power Decoupling in High Power Density Single-Phase DC-AC and AC-DC Converters
- Analysis of Volts per Hertz Scalar Control as Governor of High Pole Count, High Frequency Permanent Magnet Synchronous Machine
- Electric Field Jumping Droplet Condensation for Active Hot-Spot Cooling of High-Power-Density Electronics
- GaN-Based Flying-Capacitor Multilevel Boost Converter for High Step-Up Conversion
- High Power Density Flexible Power Electronics
- High Power Density Grid-Tied Single-Phase Converters
- High Torque Density Cycloid Electric Machines for Robotic Applications
- High-Speed, High Frequency Air-Core Machine and Drive
- IC Compatible Power Supply Circuitry for Gate Driver of Flying Capacitor Multi-Level Converters
- Mechanical Development of a High-Power-Density Rotor
- Mitigating Power Systems Variability in More Electric Aircraft Utilizing Power Electronics Implemented Dynamic Thermal Storage

## 2016-2017

- A Five-Level Flying Capacitor Multi-Level Converter with Integrated Auxiliary Supply
- AC Loss in Fully Superconducting Electric Machines
- Active Power Decoupling in High Power Density Single-Phase DC-AC and AC-DC Converters
- Analysis of Volts per Hertz Scalar Control as Governor of High Pole Count, High Frequency Permanent Magnet Synchronous Machine
- Cycloid Electric Machines for Robotic Applications
- Demagnetization Analysis on High Power Permanent Magnet Machine
- Design of Modular and Robust Control Systems for High-Specific-Power Electric Machines
- Development of Form-Wound Air-Core Armature Windings for High-Frequency Electric Machines
- Electric Field Jumping Droplet Condensation for Active Hot-Spot Cooling of High-Power-Density Electronics
- Electrical Qualification of Form-Wound Air-Core Armature Windings for High Speed Electrical Machines
- GaN-Based Flying-Capacitor Multilevel Boost Converter for High Step-Up Conversion
- High Power Density Flexible Power Electronics
- High Power Density Grid-Tied Single-Phase Converters
- High Torque Density Cycloid Electric Machines for Robotic Applications
- High-Frequency Air-Core Permanent-Magnet Motor
- High-Frequency, High-Pole-Count Design for Improving Specific Power of Electric Machines
- High-Speed, High Frequency Air-Core Machine and Drive
- IC Compatible Power Supply Circuitry for Gate Driver of Flying Capacitor Multi-Level Converters
- Mechanical Analysis of a high-speed motor
- Mechanical Development of a High-Power-Density Rotor
- Mitigating Power Systems Variability in More Electric Aircraft Utilizing Power Electronics Implemented Dynamic Thermal Storage
- Multi-Physics Optimization of High-Frequency Air-Core Permanent-Magnet Motor for Aircraft Application

## 2015-2016

- Development of High-Frequency “Airgap” Windings for High Power Density Electrical Machines
- Diagnosis of Arcing in Retaining Rings of Turbogenerators
- Electric Machine Capability Characterization for Actuators of Disaster Response Robots
- Hardware Validation for Superconducting Electric Machines
- High Power Density Grid-Tied Single-Phase Converters
- High-Frequency, High-Pole-Count Design for Improving Specific Power of Electric Machines
- Interior Permanent Magnet Machine with Simplified Structure and Control for Harsh Environments
- Mechanical Design of High Power Density Machines
- Multi-Physics Optimization of High-Frequency Air-Core Permanent-Magnet Motor for Aircraft Applications
- Power Characterization of Wide Bandgap Power Electronic Devices Across a Range of Environments for Improved System Integration

## 2014-2015

- “Little Box” Challenge
- A Transfer Function Approach to Active Damping of an Induction Motor Drive
- AC Losses in a 1 MW PM Electric Machine Using High-Frequency Air-Core Armature Windings
- Actively Shielded Air-Core Superconducting Machines
- An Investigation of Electronic Pole Changing in High Inverter Count Induction Machines
- Design of high power density, capacitor-based multilevel inverters
- Differential Power Processing for Voltage Regulation of Series-Stacked Processor Cores
- Electrical Battery Model for Use in Dynamic Electric Vehicle Simulations
- Electromagnetic and Mechanical Performance Analysis of Additive Manufactured Electric Machines Using Finite Element Simulations
- Electromagnetic and Mechanical Performance Analysis of Additive Manufactured Electric Machines Using Finite Element Simulations
- Field Containment and Robustness in Design of Air-Core Superconducting Machines
- Fully Integrated AC-AC Modular Machine Drive Based on GaN Devices
- Fully Integrated AC-AC ModularMachine Drive Based on GaN Devices
- High Frequency Airgap Windings for High Power Density Electrical Machines
- High Pole Count, High Fundamental Frequency Design for High Power Density Electric Machines
- High Speed / High Power Density Air-Core Electrical Machine Design – Thermal Management
- High Speed, High Frequency Air-Core Machine and Drive
- High-Efficiency High-Energy-Density Buffer Architecture for Power Pulsation Decoupling in Grid-Tied Applications
- Hybrid Machines for DC Generation Systems
- Induction Motor Drive Design Based on Drive-Cycle Energy Minimization
- Investigation of Electronic Pole-Changing in High Inverter Count Induction Machines
- LEARN – Leading Edge Aeronautics Research and the Fixed Wing Project: NASA-Funded Research Grants Won by Professor Kiruba Haran
- Mechanical Design of High-Speed, High-Frequency Air-Core Machine
- Mechanical Design of High-speed, High Frequency Air-Core Machine
- Mechanical Design of High-Speed, High- Frequency Air-Core Machine
- Numerical Modeling of 3D Printed Electric Machines
- Optimizing Variable DC Link Voltage for an Induction Motor Drive under Dynamic Conditions
- Power Electronic Feasibility and Characterization for Extremely High Temperature Environments
- Toolset to Study Power Flow between Aircraft Systems

## 2013-2014

- Advantages and Opportunities of Highly Parallelized Electric Machines
- Co-Design of Electric Machine and Integrated Modular Motor Drive based GaN Devices
- Design and Control of a 500 kRPM Switched Reluctance Machine with Flux Bridges on the Rotor
- Differential Power Processing for Voltage Regulation of Series-Stacked Processor Cores
- Hybrid Machines for DC Generation
- Induction Motor Drive Design Based on Drive-Cycle Energy Minimization
- Inverter Characterization for Peak Duty
- Self-Limiting Control of Induction Machines

## 2012-2013

- A 3-D Finite Element Analysis of Large-Scale Nonlinear Dynamic Electromagnetic Problems by Harmonic Balancing and Domain Decomposition
- A Motor-Generator and Supercapacitor Based System for Microgrid Frequency Stabilization — CEME Collaborative Research Project with Oregon State University
- Inverter Characterization for Intermittent and Peak Duty Motor Drives
- Performance and Efficiency Enhancement of Induction Machine Drives: Duality-Based Control to VSI and CSI Control
- Stator Configuration Constraints on Electric Machine Performance

## 2011-2012

- A Highly Efficient Domain Decomposition Method Applied to 3-D Finite Element Analysis of a Switched Reluctance Motor
- Design Strategies for Inverter-Controlled Induction Machines
- Development of Integrated Design Tool for Optimal Electro-Thermal Mechanical Design of Inverter-Dedicated Induction Machines
- Electric Machine Capabilities: A Thermal Approach
- Performance and Efficiency Enhancement of Induction Machine Drives: Duality-Based Control of VSI and CSI
- System-Based Design of a Grid-Tie Motor/Generator Set and Drive

## 2010-2011

- A Composite Material Approach Towards Induction Machine Design
- A Dual-Primal Finite Element Tearing and Interconnecting Method Combined with Tree-Cotree Splitting for 3-D Eddy Current Problems
- Accelerating Induction Machine Finite-Element Simulation with Parallel Processing
- An Investigation of Active Thermal Capacitance in Electrical Machine Thermal-Mechanical Design
- Direct Torque Control Stability Conditions and Compensation Methods
- Hardware Validation of Modeling and Design Tools for a Wound-Rotor Sychronous Machine and a Novel Asymmetrical Reluctance Machine
- Observer-Based Fault Detection of Three-Phase Motor-Drive Systems
- The Application of Time-Domain Finite Element Method to the Simulation of Three-Dimensional Benchmark Problems

## 2009-2010

- 2MW PM Machine Design for Directâ€“Driven Wind Turbine Generator Application with High Torque and Low Speed
- A Comparative Study of an Exponential Adaptive Perturb and Observe Algorithm and Ripple Correlation Control for Real-Time Optimization
- Comprehensive and Practical Optimization for Point-of-Load Voltage Regulator Design
- Control of Traditional Generation and Energy Storage Systems for Improved Coordination with Wind Farm Applications
- Finite Element Analysis of 3D Electric Machine Problems
- High Performance Control Methods for Induction Machines and Parameter Sensitivity
- Real-Time Loss Minimization in Induction Machines

## 2008-2009

## 2007-2008

- Alternative Algorithms for Automated Electric Machine Design Tool Development
- Induction Motor Power Loss Minimization Using Ripple Correlation Control
- Motor Parameterization for Induction Motor Control
- Optimization of a Synchronous Reluctance Machine for Compressor Applications
- Windings for Surface-Mount PM Machines

## 2006-2007

- Advanced Transverse Flux Permanent Magnet Linear Generator for Ocean Wave Energy Extraction
- Induction Machine Performance Improvements – Design-Oriented Approaches
- Knowledge Based Permanent Magnet Machine Design – Literature Survey
- Mathematical Field Computation as an Analytical Tool for Electric Machines

## 2005-2006

- A Framework for the Analysis and Design of Vector Controllers for Induction Machines
- An Extended Field Reconstruction Technique for Optimization of Permanent Magnet Synchronous Machine Drive Systems
- Hand-Cranked Electric Generator to Poper Remote Off-Grid Villages
- Magnetic Equivalent Circuits Applied to Induction Machine Design
- Mathematical Field Computation as an Analytical Tool for Electric Machines

## 2004-2005

- Applying Conformal Mapping Theory to Design
- Autonomous Local Controls in a Distributed DC Power System
- Design and Development of a Low Cost Hand-Cranked Electic Generator to Power Remote Off-Grid Villages
- Implementation of Torque-Angle-Based Induction Motor Control Scheme
- Multi-Machine, Single Inverter Control of Induction Machines