## 2007-2008 Publications and Patents

## Publications

M. Amrhein and P.T. Krein, “Magnetic equivalent circuit modeling of induction machines – Design-oriented approach with extension to 3-D,” in *IEEE Int’l. Electric Machines and Drives Conf.*, 2007, pp. 1557-1563.

M. Amrhein and P. T. Krein, “Magnetic equivalent circuit simulations of electrical machines for design purposes,” in *Proc. IEEE Electric Ship Technologies Symposium, *2007, pp. 254-260.

M. Amrhein and P. T. Krein, P. L. Chapman, B. I. Fierro, “Field weakening alternative,” *IEEE Industry Applications Magazine, *vol. 13, no. 6, pp. 28-37, Nov.-Dec. 2007.

R. S. Balog and P. T. Krein, “Bus selection in multibus dc power systems,” in *Proc. IEEE Electric Ship Technologies Symposium, *2007, pp. 281 – 287.

A. Banerjee, “Behavioral analysis of insulated gate bipolar transistors during hard and soft turn-off,” UILU-ENG-2007-2512, CEME-TR-2007-10, November 2007.

A. M. Bazzi and P. T. Krein, “Input Power Minimization of an Induction Motor Operating from an Electronic Drive Under Ripple Correlation Control,” in *Proc. 39th IEEE Power Electronics Specialists Conf., *2008, pp.4675-4681.

N. Benavides, “Mass minimization of dc-dc converters in portable electrical energy sources,” UILU-ENG-2007-2513, CEME-TR-2007-11, November 2007.

N. D. Benavides and P. L. Chapman, “Mass-optimal design methodology for dc-dc converters in low-power, portable fuel cell applications,” *IEEE Transactions on Power Electronics, *vol. 23, pp. 1545–1555, May 2008.

Y. Chen, “Dynamic modeling of multiple-input buck-boost converters,” UILU-ENG-2007-2505, CEME-TR-07-04, July 2007.

Y. Chen, A. Davoudi, and P. L. Chapman, “Multifrequency modeling of a multiple-input dc-dc converter,” in *Proc. Power Electronics Specialist Conference, *2008, pp., 4604-4610.

C. M. Davis, J. E. Tate, T. J. Overbye, “Wide area phasor data visualization,” in *Proc. of 2007 North American Power Symposium, *Las Cruces, NM, October 2007, pp. 246-252.

A. Davoudi, J. J. Jatskevich, and P. L. Chapman, “Averaged modeling of switched-inductor cells considering conduction losses in discontinuous mode,” *IET Electric Power Applications, *vol. 1, p. 402, 2007.

A. Davoudi and J. J. Jatskevich, “Parasitics realization in state-space average-value modeling of PWM Dc-Dc converters using an equal area method,” *IEEE Transactions on Circuit and System I, *vol. 54, pp. 1960-1967, Sep 2007.

A. Davoudi, J. J. Jatskevich, and P. L. Chapman, “State-space average-value modeling of capacitor-based switching stages: Including conduction losses,” *IEE Electronics Letters, *vol. 43, pp. 893-895, Aug. 2007. 36

A. Davoudi and P. L. Chapman, “A general framework for automated physics-based reduced-order modeling of electromechanical systems,” in *Proc. Summer Computer Simulation Conference (SCSC’07), *July 2007, pp. 221-228.

A. Davoudi, P. L. Chapman, and J. J. Jatskevich, “Nonlinear order reduction in dynamics magnetic equivalent circuits of electromagnetic actuators: Incorporating relative motion and back EMF,” in *Proc. Power Electronics Specialist Conference, *2008, pp. 3992-3995.

A. Davoudi, J. J. Jatskevich, P. L. Chapman, and A. Khaligh, “Averaged-switch modeling of fourth-order PWM DC-DC converters considering conduction losses in discontinuous mode,” *IEEE Transactions on Power Electronics, *vol. 22, pp. 2410-2415, Nov. 2007.

A. Davoudi, A. Khaligh, Marco Amrhein, P. L. Chapman, and J. J. Jatskevich, “Low-order dynamic magnetic equivalent c ircuits of saturated steel laminations,” in *Vehicular Power and Propulsion Conf., *2007, pp. 725-729.

A. D. Domínguez-García and P. T. Krein, “Integrating reliability into the design of fault-tolerant power electronics systems,” in *Proc. IEEE Power Electronics Specialists Conf, *Rhodes, Greece, June 2008 pp. 2665-2671.

G. Gallo, J. Popovic, and P.L. Chapman, “Basis and applications of GMR sensors for reinforced concrete elements,” presented at the Spring 2008 American Concrete Institute Conference.

S. R. Harper, D. L. Thurston, P. T. Krein, “The effects of dynamic residential load participation: penetration levels for operational impact on reliability,” *Int. J. Critical Infrastructures, *vol. 3, no. 1, pp. 221-234, 2007.

G. T. Heydt and P. W. Sauer, “Probabilistic Methods for Planning and Operational Analysis,” in *The Electric Power Engineering Handbook, *Vol. 4, Chapter 20, L. L. Grigsby, J. H. Harlow, and J. D. McDonald, Eds. Boca Raton, FL: CRC Press, 2007.

J. D. Glover, M. S. Sarma, and T. J. Overbye, *Power System Analysis and Design, *4th ed. London: Thompson Learning, 2007.

A. Khaligh, “Stability criteria for the energy storage bi-directional dc/dc converter in the Toyaota Hybrid System II,” in *Proc. IEEE Vehicular Power and Propulsion Conference, *September 9-12, 2007, Arlington, TX, pp. 348-352.

A. Khaligh and P. L. Chapman; “Reduction of output capacitance in dc-dc converters using anticipated load transients,” in *Proc. IEEE Applied Power Electronics Conference, *February 24-28, 2008, Austin, Texas, pp. 818-823.

A. Khaligh, P. L. Chapman, A. Davoudi, and J. J. Jatskevich, “Realization of parasitics in the stability of dc-dc converters loaded by constant-power loads in discontinuous conduction mode,” in *Proc. Vehicular Power and Propulsion Conf., *2007, pp. 31-35.

A. Khaligh, A.P. Friedl, P. Chapman,.and A. Emadi, “Anticipatory control of voltage regulator modules,” in *Proc. of the IEEE Industrial Electronics Society, *2007, pp. 1542–1547.

A. Khaligh, J. R. Wells, P. L. Chapman, and P. T. Krein, “Dead-time distortion in generalized selective harmonic control,” *IEEE Trans. Power Electronics, *vol. 23, no. 3, pp. 1511-1517, May 2008.37

J. Kimball, “Digital control techniques for switching power converters,” UILU-ENG-2007-2514, CEME-TR-2007-12, November 2007.

J. W. Kimball, B. T. Kuhn, and P. T. Krein, “Increased performance of battery packs by active equalization,” in *Proc. IEEE Vehicle Propulsion Power Conf., *2007, pp. 323– 327.

J. W. Kimball and P. T. Krein, “A current-sensorless digital controller for active power factor correction based on Kalman filters,” in *Proc. IEEE Applied Power Electronics Conference, *February 24-28, 2008, Austin, Texas, p. 1328-1333.

J. W. Kimball, J. T. Mossoba, and P. T. Krein, “A stabilizing, high-performance controller for input series-output parallel converters,” *IEEE Trans. Power Electronics, *vol. 23, no. 3, pp. 1416-1427, May 2008.

P. T. Krein, “Battery management for maximum performance in plug-in electric and hybrid vehicles,” in *Proc. IEEE Vehicle Propulsion Power Conf., *2007, pp. 2-5.

P. T. Krein, “Digital control generations — Digital controls for power electronics through the third generation,” in *Proc. IEEE Power Electronics and Drive Systems, *2007.

P. T. Krein, “Hybrid and electric automotive systems: Combined electrical, mechanical, and fuel cell opportunities for personal transportation,” *Asian Power Electronics Journal, *vol. 1, no. 1, pp. 21-24, 2007. Invited paper in inaugural issue.

P. T. Krein, “Introduction to power electronics,” in *Power Electronics: Devices, Circuits, and Applications Handbook, *2nd ed., M. Rashid, Ed. New York: Academic Press, Chapter 1, 2007.

R. Kroeze and P. T. Krein, “Electrical battery model for use in dynamic electric vehicle simulations,” in *Proc. IEEE Power Electronics Specialists Conf., *Rhodes, Greece, pp. 1336-1342.

A. Kwasinski, “A microgrid architecture with multiple-input dc/dc converters: Applications, reliability, operation, and control,” UILU-ENG-2007-2508, CEME-TR-2007-06, August 2007.

A. Kwasinski and P. T. Krein, “Passivity-based control of buck converters with constant-power loads,” in *Proc. IEEE Power Electronics Specialists Conf., *2007, pp. 259-265.

A. Kwasinski and P. T. Krein, “Stabilization of constant power loads in dc-dc converters using passivity-based control,” in *Proc. IEEE Int. Telecommunications Energy Conf., *2007, pp. 867-874.

A. Kwasinski and P. T. Krein, “Telecom power planning for natural and man-made disasters,” in *Proc. IEEE Int. Telecommunications Energy Conference, *2007, pp. 216-222. Best paper award.

S. Liu, P. W. Sauer, and N. Sri Namachchivaya, “Techniques for dynamic state estimation of machines in power systems,” in *Proc. 7th WSEAS International Conference on Power Systems, *Beijing, China, pp. 1-6, Sept. 15-17, 2007.

B. Nee, “Integration of filter elements in electric drives,” UILU-ENG-2007-2510, CEME-TR-2007-08, October 2007.

B. Nee and P. L. Chapman, “Integrated filter components in electric drives,” in *Proc. IEEE Vehicular Power and Propulsion Conference, *9-12 Sept. 2007, pp. 148-153.38

P. Niu, “Biomechanical energy conversion,” UILU-ENG-2007-2509, CEME-TR-2007-07, September 2007.

P. Niu, P. L. Chapman, L. DiBerardino, and E. H.-Wecksler, “Design and optimization of a biomechanical energy harvesting device,” in *Proc. PESC, *Rhodes, Greece, June 2008, pp. 4062-4069.

T. C. O’Connell and P. T. Krein, “Calculating the induced currents in induction machines using Schwarz-Christoffel mapping,” in *Proc. of the Electrical Insulation Conference, *Nashville, TN, Oct. 2007.

T. J. Overbye, E. M. Rantanen, and S. Judd, “Electric power control center visualizations using geographic data views,” in *Bulk Power System Dynamics and Control—VII. Revitalizing Operational Reliability — 2007 IREP Symposium, *Charleston, SC, August 2007, pp. 1-8.

G. Pitel and P. T. Krein, “Real-time system identification for load monitoring and transit handling of dc-dc supplies,” in *IEEE Power Electronics Specialists Conf, *Rhodes, Greece, pp. 3807-3813.

J. S. Popovics, G. Gallo, M. D. Shelton, and P. L. Chapman, “A magnetic sensing approach to characterize corrosion in reinforced concrete,” in *Proc. SPIE Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, *vol. 6529(2), pp. 65291A.1-65291A.7.

L. Qu, “Reduction of dynamic nonlinear models of magnetic devices,” UILU-ENG-2007-2506, CEME-TR-07-05, August 2007.

L. Qu, and P. L. Chapman, “Extraction of Dynamic Low Order Models for Multiwinding Magnetic Devices Based on Finite Element Analysis,” in *IEEE Power Electronics Specialists Conf, *Rhodes, Greece, pp 4611-4616.

B. C. Raczkowski and P. W. Sauer, “Identification of critical cutsets for static collapse analysis,” in *Proc. Bulk Power Systems Dynamic and Control—VII, *Charleston, South Carolina, August 19-24, 2007, pp. 1-7.

P. W. Sauer, K. L. Tomsovic, and V. Vittal, “Dynamic security assessment,” in *The Electric Power Engineering Handbook, *2nd ed., Vol. 5, London: Chapter 15, London: Taylor and Francis, 2007, pp. 15.1-15.10.

P. W. Sauer, “Editorial,” *Int. Journal of Critical Infrastructures, *vol. 3, nos. 1 and 2, pp. 1-2, 2007.

H.-C. Seo, P. Chapman, P. T. Krein, and K. Kim, “Non-alloyed Ohmic contact using selective-area growth by plasma-assisted molecular beam epitaxy,” in *Electronic Materials Conference 2007, *Notre Dame, IN, June 2007, p. 58.

H.-C. Seo, P. Chapman, P. T. Krein, J. -H. Lee, and K. Kim, “DC performance of high-power GaN FET devices with non-alloyed ohmic contacts fabricated by PAMBE-based Selective-area growth,” in *7th International Conference of Nitride Semiconductors, *Las Vegas, Sept. 2007, p. 49.

H.-C. Seo, S. J. Hong, P. Chapman, and K. Kim, “Formation of low-resistance ohmic contact by damage-proof selective-area growth of single-crystal n+-GaN using plasma-assisted molecular beam epitaxy,” *Journal of Electronic Materials,. *vol. 37, pp. 635-640, 2008.39

J. E. Tate, T. J. Overbye, “Contouring for power systems using graphical processing units,” in *Proc. 41st Hawaii International Conference on System Sciences, *Waikoloa, HI, January 2008, p. 168.

L. Wang, A. Davoudi, J. Jatskevich, and P. L. Chapman, “Accelerated state-variable modeling of synchronous machine-converter systems,” in *IEEE International Symposium on Circuit and Systems, *2008, pp. 3037-3040.

L. Wang, S. C. Foroosh, J. Jatskevich, and A. Davoudi, “Physical variable modeling of multiphase induction machines,” in *Proc. 21st IEEE Canadian Conf. on Elec. Comp. Eng. (CCECE08), *2008, pp. 999-1004.

W. Weaver, “Geometric and game-theoretic control of energy assets in small-scale power systems,” UILU-ENG-2007-2511, CEME-TR-2007-09, September 2007.

W. W. Weaver and P. T. Krein, “Analysis and applications of a current-sourced buck converter,” in *Proc. IEEE Applied Power Electronics Conf., *2007, pp. 1664-1670.

W. W. Weaver and P. T. Krein, “Mitigation of voltage collapse through active dynamic buffers,” *Int. J. Critical Infrastructures, *vol. 3, no. 1, pp. 101-123, 2007.

M. Yilmaz, and P. T. Krein, “Capabilities of finite element analysis and magnetic equivalent circuits for electrical machine analysis and design,” in *IEEE Power Electronics Specialists Conf., *Rhodes, Greece, June 2008, pp. 4027-4033.

A. Zachas, Y. Duan, R. G. Harley and T. G. Habetler of Georgia Institute of Technology Electric Power Group, “Knowledge based permanent magnet machine design—literature survey,” UILU-ENG-2007-2515, CEME-TR-2007-13, December 2007.

G. Zhang and P. T. Krein, “Torque-angle-oriented control of induction machines,” in *Proc. IEEE Int’l. Electric Machines and Drives Conf., *2007, pp. 407-412.

## Patents

P. T. Krein, “Methods and Devices for Input Waveform Control in Switching Power Supplies,” U. S. Patent 7,382,112, June 2008.