The Grainger Center for Electric Machinery and Electromechanics update, May 2006

1. The Grainger Center for Electric Machinery and Electromechanicsupdate, May 2006 P. Krein, P. Chapman Grainger Center for Electric Machinery and Electromechanics Dept. of Electrical and Computer Engineering University of Illinois at Urbana-Champaign

2. Introduction • The Grainger Center for Electric Machinery and Electromechanics (CEME) a large endowed academic program. • Funds leverage industry and government support. • About 25 graduate students and many additional undergraduates. • Research on machines, drives and drive controls, and advanced energy processing.

3. Highlights • Emphasis this year: enhance national collaboration activities. • A 21st century design initiative with our collaborating universities in preparation. • Expand future-oriented energy conversion efforts – disruptive energy innovations and fundamental advances.

4. 21st Century Electric Machines Initiative • Worldwide, 2/3 of electricity is consumed by electric machines. • Nearly all were designed two generations ago • Before power electronics • Before good permanent magnets • Before computer-basedengineering tools. • The design needs and applications have changed.

5. 21st Century Electric Machines Initiative • A machine today is not just steel and copper. • Add to the mix of choices: • Silicon devices for switching andcontrol. • Advanced steels. • Exotic magnetic materials. • Superconductors. • Nanoengineered materials. • New thermal technologies.

6. 21st Century Electric Machines Initiative • We are collaborating with Purdue and Georgia Tech on a major research initiative to create a 21st century design framework for electric machines and electromechanics. • This combines electrical, mechanical, and materials engineering to create user tools. • Educational aspects: • New “clean slate” textbook. • Short courses and seminars. • Lab methods.

7. 21st Century Electric Machines Initiative • Project examples: • Tim O’Connell, computer methods for exact field analysis • Marco Amrhein, design for high efficiency. • Penglin Niu,designconsiderationsfor humanpower

8. Disruptive Energy Innovations • One-stage grid inverter for alternative energy. • Disruption: direct “plug and play” processing. • Disruption: technology that scales down to small modules for broad use. • Today, solar power costs are split almost equally between semiconductor cells, power conversion, and mounting and installation. • Most outside research emphasizes semiconductor advances instead of a complete energy system.

9. Collaborative Network • University of California (Berkeley) • Georgia Tech • Ohio State • Oregon State • Purdue • University of Wisconsin (Madison)

10. Themes • Best use of technology and hardware • Best performance for power conversion • Best match between power electronic circuits and controls and the applications • Nonlinear controls for both analog and digital implementations of motor controls and power electronics • System-level design and performance • 3rd generation digital controls

11. Fundamental Studies • Mathematical justification and extension of motor control methods. • Harmonic elimination approaches • Identified a more complete (infinite) range of solutions • Implemented in near-real-time algorithms • Hybrid and electricvehicle systems • Digital implementationsof nonlinear controls

12. Boost Converter with “Infinite Bandwidth” • Line step disturbance. • The digital control eliminates the transient.

13. Research Equipment • Power inverters for motor control testing. • Circuit design tools. • Test beds for powerconverters.

14. More Sample Projects • Small-scale converters for microfuel cells. • The power buffer, a method touse power electronics in loadsto mitigate power system dynamics. • Drives for 42 V automotive applications. • Analysis and enhancement of direct torque control methods. • Advanced digital methods for motor control.

15. Area Infrastructure • Rotating and linear machines • Unique instructional lab About 40 students per yearenroll in power electronics. Also about 40 students peryear in machines.