Jian Sun Photo                Dr. Jian Sun

                        Associate Professor
                        Electrical, Computer, and Systems Engineering (ECSE)
                        Rensselaer Polytechnic Institute

                   Contact Information

                        Electrical, Computer, and Systems Engineering Department
                        Rensselaer  Polytechnic Institute
                        110 8th Street, Troy, NY 12180-3590
                        Phone: (518) 276-8297, Fax: (518) 276-6226
                        E-Mail: jsun@rpi.edu

Research Areas

Power electronics and electric energy conversion; Specific research interests include

  • High-performance ac-dc converters with active power factor correction
  • Power management, power IC, and integrated power for microelectronics applications
  • EMI and EMC
  • Renewable energy systems integration
  • Modeling, analysis, and control of power electronic circuits and systems
  • Aircraft, micro grids, and other self-contained power systems; system stability, power quality, and control

Teaching

  • ECSE/EPOW 4080 – Semiconductor Power Electronics (offered every fall semester)
  • EPOW 6820 – Power Quality (offered in the spring semester of odd-numbered years)
  • EPOW 6090 – Advanced Power Electronics Lab (offered in the spring semester of even-numbered years)

Education and Industry Experience

  • Ph.D. in Electrical Engineering, University of Paderborn , Paderborn, Germany, 1995
  • MS in Electrical Engineering, Beijing University of Aeronautics and Astronautics , China, 1989
  • BS in Electrical Engineering, Nanjing University of Aeronautics and Astronautics , China, 1984
  • Post-Doctoral Fellow, School of Electrical and Computer Engineering , Georgia Institute of Technology , 1996-1997
  • Senior Engineer, Advanced Technology Center , Rockwell Collins , 1997-1999
  • Principal Engineer, Advanced Technology Center , Rockwell Collins , 2000-2002

Professional Services

·        Vice Chair, IEEE PELS Technical Committee on Modeling, Simulation, and Control

·        Associate Editor, IEEE Transactions on Power Electronics

·        General Chair, 2006 IEEE Workshop on Computers in Power Electronics

Patents

·        “Bi-directional dc-to-dc converters for energy storage applications,” US Patent # 6,243,277.

·        “Integrated magnetic converter circuit and method with improved filtering,” US Patent # 6549436.

·        “Switching power converter circuits providing main and auxiliary output voltages,” US Patent # 6775159.

·        “Composite core design for matrix integrated magnetics in high power interleaved dc-dc converters,” US Patent #6980077.

·        “Vertically packaged switched-mode power converter,” US Patent #7012414.

·        “Core structure and interleaved dc-dc converter topology,” US Patent #7046523.

Publications

·       Selected Journal Papers

1.      J. Sun, S. Beineke, and H. Grotstollen, “Optimal PWM based on real-time solution of harmonic elimination equations,” IEEE Transactions on Power Electronics, vol 11, no. 4, July 1996, pp. 612-621.

2.      J. Sun and H. Grotstollen, “Symbolic analysis methods for averaged modeling of switching power converters,” IEEE Transactions on Power Electronics, vol. 12, no. 3, 1997, pp. 537-546.

3.      J. Sun and H. Grotstollen, “Fast time-domain simulation by waveform-relaxation methods,” IEEE Transactions on Circuits and Systems – I: Fundamental Theory and Applications, vol. 44, no. 8, August 1997, pp. 660-666.

4.      J. Sun, et al., “Averaged modeling of PWM converters operating in discontinuous conduction mode,” IEEE Transactions on Power Electronics, vol. 6, no. 4, pp. 482-4922, 2001.

5.      J. Sun, “Small-signal modeling of variable-frequency pulse-width modulators,” IEEE Transactions on Aerospace and Electronics Systems, vol. 38, no.3, pp. 1104-1108, July 2002.

6.      V. Rajasekaran, J. Sun, and B. Heck, “Bilinear discrete-time modeling for enhanced stability prediction and control design,” IEEE Transactions on Power Electronics, vol. 18, no. 1, pp. 381-389, 2003.

7.      J. Sun et al., “Integrated magnetics for current-doubler rectifiers,” IEEE Transactions on Power Electronics, vol. 19, no. 3, pp. 582-590, 2004.

8.      J. Sun, “On the zero-crossing distortion in single-phase PFC converters,” IEEE Transactions on Power Electronics, vol. 19, no. 3, pp. 685-692, 2004.

9.      J. Sun, “Input impedance analysis of single-phase PFC converters,” IEEE Transactions on Power Electronics, vol. 20, no. 2, pp. 308-314, March 2005.

10.  J. Sun, “Characterization and performance comparison of ripple-based control for voltage regulator modules,” IEEE Transactions on Power Electronics, vol. 21, no. 2, pp. 346-353, 2006.

11.  M. Chen and J. Sun, “Feedforward current control of boost single-phase PFC converters,” IEEE Transactions on Power Electronics, vol. 21, no. 2, pp. 338-345, 2006.

12.  M. Chen and J. Sun, “Reduced-order averaged modeling of active-clamp converters,” IEEE Transactions on Power Electronics, vol. 21, no. 2, pp. 487-494, 2006.

·       Recent Conference Papers

1.      J. Sun and V. Mehrotra, “Orthogonal winding structures and design for planar integrated magnetics,” Proceedings of 2004 IEEE Applied Power Electronics Conference, pp. 933-938, 2004

2.      M. Chen and J. Sun, “Feedforward current control of boost single-phase PFC converters,” Proceedings of 2004 IEEE Applied Power Electronics Conference, pp. 1187-1193, 2004.

3.      J. Sun, “Characterization and performance comparison of ripple-based control methods for voltage regulator modules,” Records of 2004 IEEE Power Electronics Specialists Conference, pp. 3713-3720, 2004.

4.      J. Sun and M. Chen, “Analysis and mitigation of interactions between PFC converters and the ac source,” Proceedings of 4th International Power Electronics and Motion Control Conference, pp. 99-104, 2004.

5.      P. T. Prathapan, M. Chen, and J. Sun, “Feedforward current control of boost derived single-phase PFC converters,” Proceedings of IEEE 2005 Applied Power Electronics Conference, pp. 1716-1722, 2005.

6.      M. Chen and J. Sun, “A general approach to averaged modeling and analysis of active-clamped converters,” Proceedings of IEEE 2005 Applied Power Electronics Conference, pp. 1359-1365, 2005.

7.      W. Lim, B. Choi, and J. Sun, “Comparative performance evaluation of current-mode controls adapted to asymmetrically-driven bridge-type pulse-width modulated dc-to-dc converters,” Proceedings of IEEE 2005 Applied Power Electronics Conference, pp. 1179-1185, 2005.

8.      D. Kim, D. Lee, B. Choi, and J. Sun, “Analysis of input filter interactions in switching power converters,” Proceedings of IEEE 2005 Applied Power Electronics Conference, pp. 191-198, 2005.

9.      D. Kim, B. Choi, D. Lee, and J. Sun, “Dynamics of current-mode-controlled dc-to-dc converters with input filter stage,” Records of IEEE 2005 Power Electronics Specialists Conference, pp. 2648-2656, 2005.

10.  D. Lee, B. Choi, J. Sun, and B. H. Cho, “Interpretation and prediction of loop gain characteristics for switching power converters loaded with general load subsystem,” Records of IEEE 2005 Power Electronics Specialists Conference, June 2005, pp. 1024-1029, 2005.

11.  J. Sun and B. Choi, “Averaged modeling and switching instability prediction for peak current control,” Records of IEEE 2005 Power Electronics Specialists Conference, pp. 2764-2770, 2005.

12.  M. Chen and J. Sun, “Low-frequency input impedance models for boost single-phase PFC converters,” Records of IEEE 2005 Power Electronics Specialists Conference, pp. 1062-1068, 2005.

13.  M. Chen, Z. Jia, J. Sun, and K. Karimi, “Ac-dc converters modeling for airborne power systems analysis,” in Proceedings of International Energy Conversion Engineering Conference, August 2005

14.  S. Miller and J. Sun, “Comparative study of three-phase PWM rectifiers for wind power conversion,” Proceedings of 2006 IEEE Applied Power Electronics Conference.

15.  M. Chen, A. Mathew, and J. Sun, “Mixed-signal control of single-phase PFC based a nonlinear current control method,” Records of 2006 IEEE Power Electronics Specialists Conference.

16.  M. Chen, A. Mathew, and J. Sun, “Nonlinear current control of single-phase PFC suitable for mixed-signal IC implementation,” Proceedings of IEEE 5th International Power Electronics and Motion Control Conference, pp. 442-448, 2006

SYMAP

SYMAP is the first public-domain software program package for automated modeling and analysis of power electronic circuits. The major functions of the package include

  • Automated averaged model derivations for line-frequency ac/dc and various dc/dc power converters (hard-switching PWM converters, zero current switching and zero voltage switching quasi-resonant converters, as well as soft transition PWM converters);
  • Analytical ripple function derivation for switching variables based on the averaged model;
  • Large-signal transient response simulations based on both averaged and switching models, for both open-loop and closed-loop systems;
  • Small-signal analysis based on the averaged models, transfer function determinations, and frequency-domain response analysis

The package requires Mathematica , a product of Wolfram Research, Inc . If you don't have Mathematica, you can still view the package by using MathReader, which can be downloaded from http://www.mathsource.com/cgi-bin/MathSource/General/MathReader/0208-707

  • Package
  1. Nodal.m
  2. Average.m
  3. KBM.m
  4. Graphic.m

·         Examples

  1. Zero-Voltage Transition Boost Converter
  2. PWM Cuk Converter
  3. PWM SEPIC Converter
  4. PWM Zeta Converter
  5. ZVS Quasi-Resonant Buck Converter