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Home > About Us >People > Faculty

Prasad Enjeti
Texas Instruments Professor, IEEE Fellow
Power Electronic & Clean Power Research Laboratory
&  Fuel Cell Power Systems Laboratory
Office: 216K, Zachry Engineering Center
Phone: (979) 845-7466
Fax: (979) 845-6259

Web Page: http://enjeti.tamu.edu/


Education

Areas Of Research

His primary research interests are: Advance converters for power supplies, motor drives; power quality issues, active power filter development; utility interface issues,  advancing switching power supply designs and solutions to complex power management issues in the context of analog mixed-signal applications; exploring alternative designs to meet the demands of high slew rate load currents at low output voltages; power conditioning systems for fuel cells, wind and solar energy systems; and design of high temperature power conversion systems with wide band-gap semiconductor devices. He holds four US patent and has licensed two new technologies to the industry so far. He was the recipient of the IEEE-IAS Second & third best paper award in 1993, 1998, 1999, 2001 & 1996 respectively; second best IEEE-IA transaction paper published in mid-year 1994 to mid-year 1995 and, IEEE-IAS Magazine Prize Article Award in the year 1996. In year 2000, he was elected to Fellow grade by the IEEE Fellow Committee for "Contributions to solutions of utility interface problems in power electronic systems and harmonic mitigation”. He is also the recipient of the select title “Class of 2001 Texas A&M University Faculty Fellow” Award for demonstrated achievement of excellence in research, scholarship and leadership in the field. He directed a team of students to design and build a low cost fuel cell inverter for residential applications, which won the 2001 future energy challenge award, grand prize, from the department of energy (DOE).

He is the lead developer of the Power Electronics / Power Quality & Fuel Cell Power Conditioning Laboratories at Texas A&M University and is actively involved in many projects with industries while engaged in teaching, research and consulting in the area of power electronics, motor drives, power quality and clean power utility interface issues. He is a registered professional engineer in the state of Texas.

Recent Distinctions And Awards

Publications And Research

Patents:

Research Theses Supervised:

Short Courses And Tutorials:

  1. Tutorial on “Power Conditioning Systems for Fuel Cells”, March 7,8,9, 2007, Tubitak Mam, Energy Research Institute, Istanbul, Turkey
  2. Tutorial on “Fuel Cell Power Conditioning”, Fuel Cell Seminar, 2005, November 2005, Palm Springs, CA
  3. Tutorial on “Fuel Cell Power Conditioning”, Fuel Cell Seminar, 2004, November 2004, San Antonio, TX
  4. Tutorial on “Fuel Cell Power Conditioning”, Fuel Cell Seminar 2003, November 2003, Miami Beach, FL
  5. Advanced Fuel Cell Power Conditioning Systems, National Technology University, Sponsored by US Department of Energy, March 25th to March 27th, 2002, Course Link
  6. Tutorial on “Power Electronics for Distributed Energy Systems: Fuel Cells and Microturbines”, CIEP’02 Seminar on October 20th 2002, Guadalajara, Mexico,
  7. An Overview of Single Phase and Three Phase Power Factor Correction Methods for Switching Converters, IEEE Applied Power Electronics Conference, March 10th, 2002, with Oscar Garcia
  8. Low Cost Approaches for Mitigation of Harmonics and Ensure Power Quality Compliance of Adjustable Speed Drive Systems, ICPE’01 Conference, Seoul, Korea, October 15th, 2001
  9. Utility interface issues of Power Electronic Equipment, IEEE Industry Application Society Annual Conference, October, 1999, Tutorial topic presenter.
  10. Design of three-phase rectifier system with Clean input power characteristics, IEEE Power Electronics Specialists Conference, June 1999, with Ira. J. Pitel
  11. How to select and apply an adjustable speed ac drive, IEEE Applied Power Electronics Conference, March, 1999, with V.R. Stefanovic
  12. Assessment of ride-through alternatives for adjustable speed drives, PCIM98 Conference, November 1998, with A. von Jouanne
  13. Fundamentals of Brush-less motor control, Tutorial topic presenter at Motor College, Small Motors Manufacturing Association, April, 2000, 1999 & 1998, with Dal Ohm
  14. “Motor Drive/Power System Interaction”, IEEE Industry Application Society Annual Conference, October, 1997, Tutorial topic presenter
  15. “Adjustable speed ac motor drives: Application problems”, European Power Electronics Conference, September 6th, 1997, Trondheim, Norway, with F. Blaabjerg and J. Pederson
  16. “Power Electronics Simulation with Pspice”, Presented to Baldor Motors & drives design engineers”, April 1997
  17. “Power Quality considerations of power electronic systems and the application of Active Filters” Presented at the University of Concepcion, Concepcion, Chile, March 1997
  18. “Electronic ballast’s for fluorescent and high intensity discharge lamps”, PCIM 1996 Conference.
  19. “Utility interface issues of power electronic converters”, Tutorial topic presenter on - case studies of harmonics in low voltage three phase four wire electric distribution systems, IEEE Industry Application Society Annual Conference, 1995 and 1996.
  20. “Application of adjustable speed ac motor drives - problems and some low cost solutions”, PCIM95 & PCIM 96 Conference and IEEE APEC 1996 Conference.
  21. “Introduction to Power System Harmonics and Active Harmonic Filtering”, to IEEE Houston section IAS/PES members, April 20-21, 1994
  22. “Power Electronics Simulation” - Tutorial, Presented at CIEP94 3rd International power electronics conference, Puebla, Mexico, August, 1994 and PCIM Conference, October, 1994.
  23. “Simulation of high power electronic systems and motor drives”, Toshiba industrial division, Houston, TX, Oct. 1994 and Allen Bradley Industrial division, Milwaukee, WI, March 1995
  24. “Simulation of Power Electronic Circuits with PSPICE”, AT&T Power Supply Group, Mesquite, TX, April 6,7 and November 29, 30 1994.
  25. “Advanced Pulse width Modulation (PWM) Techniques”, IEEE APEC Conference Seminar, Dallas, TX, 1991.

Publications

  Books & Book Chapters

  1. Book: “Power Conditioning Systems for Fuel Cells” Under preparation.
  2. Book Chapter: “Chapter # 9: Power Conditioning Systems for Fuel Cell Systems”, US Department of Energy Fuel Cell Handbook, Sixth Edition, 2002 and Seventh Edition 2004.
  3. Book Chapter: “Chap-26: Remedies for neutral current harmonics”, in Power Quality Solutions, Case Studies for trouble shooters, Edited by: J. Porter, Van Sciver, The Fairmont Press, Prentice Hall, 1998, ISBN: 0-88173-279-6 FP or 0-13-020730-6 PH
  4. Book Chapter: “Over Voltage Protection of Switching Power Supplies” Encyclopedia of Electrical and Electronics Engineering, Wiley & Sons, Inc. 1998
  5. Book Chapter: “Application Problems in Modern IGBT Inverter Motor Drives”, PCIM Publications, 1997
  6. Book Chapter: “Power Quality, “Power Electronics Technologies & Applications”, IEEE Technologies Update Series, IEEE Press Publication, 1997.
  7. Book Chapter: “New Power Converters, Power Factor Correction and High Power Converters”,  Industrial Electronics Handbook, CRC Press, Inc. Publication, 1996,     ISBN: 0-8493-8343-9

Technical Reports:

  1. P. Enjeti, “Vehicle systems and subsystems interactions with power electronics for FreedomCar”, Technical report, ORNL-DOE, July 2004
  2. A. von Jouanne and P. Enjeti, “Adjustable Speed Drive (ASD) Ride-through technology – Alternatives and development”, EPRI Report TR-109903, December 1997.
  3. A. von Jouanne and P. Enjeti, “Medium voltage adjustable speed drive (ASD) ride-through options and implementation methods”, EPRI Report TR-111760, November 1998
  4. A. von Jouanne and P. Enjeti, “DC drive ride-through technology alternatives and development”, EPRI Report TR-111759, December 1998.

Recent Journal Papers:

  1. M.H. Todorovic, L. Palma, P. Enjeti "Design of a Wide Input Range DC-DC Converter with a Robust Power Control Scheme Suitable for Fuel Cell Power Conversion", IEEE Transactions on Industrial Electronics, Accepted for publication
  2. S. Ratanapanachote, H. J. Cha, P. Enjeti, “A digitally controlled switched mode power supply based on Matrix Converter”, IEEE Power Electronics Transactions, Vol. 21, NO. 1, January 2006, pp 124 to 130
  3. L. Palma, R. Morrison, P. Enjeti, J. Howze, “Use of Web-Based Materials to Teach Electric Circuit Theory” IEEE Transactions on Education, Volume 48,  Issue 4,  Nov. 2005 Page(s):729 - 734
  4. Choi, W.; Enjeti, P.; Howze, J.W. “Fuel cell powered UPS systems: design considerations”, Journal of Power Sources. Volume 157, Issue 1, 19 June 2006, Pages 311-317, Published by Elsevier. www.elsevier.com/locate/jpowsour
  5. Choi, W.1, Joung, G., Howze, J., Enjeti, P., “Development Of An Equivalent Circuit Model For A Fuel Cell Stack To Evaluate The Effects Of Inverter Ripple Current”, IEEE Applied Power Electronics Conference 2004. Also: Journal of Power Sources, Volume 158, Issue 2, 25 August 2006, Pages 1324-1332
  6. Oscar Montero, P. Enjeti, “A fast detection algorithm suitable for mitigation of numerous power quality disturbances”, IEEE Transactions on Industry Applications, Volume 41,  Issue 6,  Nov.-Dec. 2005 Page(s):1684 - 1690
  7. Jeraputra, C., Enjeti, P., Hwang, I., “Development Of A Robust Anti-Islanding Algorithm For Utility Interconnection Of Distributed Fuel Cell Powered Generation”, In IEEE Transactions on Power Electronics, Vol. 19, Number 5, September 2004, pp 1163-1170
  8. H. Cha, P. Enjeti, “A new ride-through approach for Matrix Converter fed Adjustable Speed Drives”, IEEE IAS Annual Meeting Conference, October 2002, IEEE IAS Magazine July/August 2004, Vol. 10, No 4, ISSN 107-2618, pp: 33-39.
  9. W. Choi, P. Enjeti, “An Experimental Evaluation of the Effects of Ripple Current Generated by the Power Conditioning Stage on a Proton Exchange Membrane Fuel Cell Stack, “In Journal of Materials Engineering and Performance, Volume 13, No. 3, June 2004, pp: 257-264 (www.asminternational.org)
  10. S.K. Chung, Y. Song, P. Enjeti, “Current-fed high-frequency link inverter with active input filter”, IEE Electronic Letters, Vol. 40, No. 7, 1st April 2004.
  11. R. Gopinath, S.S. Kim, J.H. Hahn, P. Enjeti, M.B. Yeary and J.W. Howze, “Development of a low cost fuel cell inverter system with DSP control”, In IEEE Transactions on Power Electronics, Vol. 19, Number 5, September 2004, pp 1256-1262
  12. E. Aeloiza, O. Montero, P. Enjeti and L. Moran, “Analysis and design of a new voltage sag compensator for critical loads in electric power distribution systems”, IEEE Transactions on Industry Applications, Vol. 39, No. 4, July/August 2003, pp: 1143-1150. First Prize paper Award, IEEE IAS (IPCC) in 2002.
  13. H.J. Cha, P. Enjeti, “An approach to reduce common mode voltage in Matrix Converters”, IEEE Transactions on Industry Applications, Vol. 39, No. 4, July/August 2003, pp: 1151-1159
  14. S.S. Kim, P. Enjeti, “A modular single phase power factor correction scheme with a harmonic filtering function”, IEEE Transactions on Industrial Electronics, Vol. 50, No. 2, April 2003, pp 328-335  
  15. S.S. Kim, P. Enjeti, “A Parallel-Connected Single Phase Power Factor Correction Approach with Improved Efficiency”, IEEE Transactions on Power Electronics, Volume: 19 , Issue: 1 , Jan. 2004
    Pages: 87 - 93
  16. S.S. Kim, P. Enjeti, “Control of multiple single phase PFC modules with a single low-cost DSP”, EEE Transactions on Industry Applications, Volume: 39 , Issue: 5, Sept/Oct 2003, pp: 1379 - 1385
  17. S.S. Kim, M.H. Todorovic, P. Enjeti, “Three Phase Active Harmonic Rectifier (AHR) to Improve Utility Input Current THD in Telecommunication Power Distribution System”, IEEE Transactions on Industry Applications, Volume: 39 , Issue: 5, Sept/Oct 2003, pp: 1414 - 1421
  18. R. Teodorescu, F. Blaabjerg, J.K. Pedersen, E.Cengelci, P. Enjeti, “Multilevel Inverter by Cascading Industrial VSI”, IEEE Transactions on Industrial Electronics, Vol. 49, No. 4, August 2002, pp. 832 to 838, This is a Special Issue on Multilevel Inverters.
  19. Oscar Montero-Hernandez, P. Enjeti, “Ride-through for critical loads. Exploring a low-cost approach to maintaining continuous connections between buildings and/or industrial systems”, IEEE Industry Applications Magazine, Volume: 8, Issue: 6 , Dec. 2002,  pp: 45 - 53
  20. J.L. Durán-Gómez, P. Enjeti, “A new approach to mitigate nuisance tripping of PWM ASDs due to capacitor switching transients (CSTs)”, IEEE Transactions on Power Electronics, Volume: 17 Issue: 5 , Sep 2002 , pp: 799 -806
  21. S.S. Kim, P. Enjeti, “A new hybrid active power filter (APF) topology” IEEE Transaction on Power Electronics, Volume: 17, No. 1, Jan 2002, pp: 48-54
  22. J. L. Durán-Gómez, P. Enjeti and A. von Jouanne, “An Approach to Achieve Ride-Through of an Adjustable Speed Drive with Flyback Converter Modules Powered by Super Capacitors”, IEEE Transactions on Industry Applications, Vol. 38, No. 2, March/April 2002, pp 514-522
  23. S.S. Kim, P. Enjeti, “DSP Corrects switched-mode power factors”, Electronic Design, June 4, 2001, pp 25-26. To read this article on the Web click here
  24. P. Enjeti, J. L. Durán-Gómez, “A new approach to avoid nuisance tripping of ASDs”, Power Quality Magazine, September/October 2001, pp 28-32. To read this article on the Web click here
  25. J.H Hahn, P. Enjeti, “A new three phase power factor (PFC) scheme using two single phase PFC modules”, IEEE Transactions on Industry Applications, Vol. 38, No. 1, Jan./Feb. 2002, pp 123-130
  26. Uffe Borup, F. Blaabjerg, P. Enjeti, “Sharing of nonlinear loads in parallel connected three-phase converters”, in IEEE Transactions on Industry Applications, Nov/Dec 2001, Vol. 37, No.6, pp 1817-1823. (This Paper Received IEEE IAS IPCC Committee Second Best Paper Award, 2001)
  27. Uffe Borup, F. Blaabjerg, P. Enjeti, “A new space vector based control method for UPS systems powering nonlinear and unbalanced loads”, IEEE Transactions on Industry Applications, Vol. 37, No.6, Nov/Dec 2001, pp 1864-1870
  28. E. Cengelci, P. Enjeti, W. Gary, “A new modular motor-modular inverter (MM-MI) concept for medium voltage adjustable speed drive systems”, IEEE Transactions on Industry Applications, Vol. 36, No. 3, May/June 2000, pp. 786-796 (This Paper Received IEEE IAS IDC Committee Second Best Paper Award, 1999)
  29. S. Hansen, P. Enjeti, J.H. Hahn, F. Blaabjerg, “An integrated single-switch approach to improve harmonic performance of standard PWM adjustable speed drives”, IEEE Transactions on Industry Applications, Vol. 36, No. 4, July/August 2000, pp. 1189-1196
  30. D. Rendusara, E. Cengelci, P. Enjeti, “Analysis of common mode voltage – Neutral shift in Medium voltage PWM adjustable speed drive (MV-ASD) system”, IEEE Transactions on Power Electronics, Vol. 15, No. 6, November 2000, pp. 1124-1133

Recent Conference Papers:

  1.   L. Palma, P. Enjeti, “A Modular Fuel Cell, Modular DC-DC Converter Concept for High Performance and Enhanced Reliability”, Accepted for presentation, IEEE PESC 2007 Conference, June 17-21, Orlando, FL
  2. S. Ahmed, P. Harsha, P. Enjeti “A High Density Power Converter for Remotely Operated Loads” Accepted for presentation, IEEE PESC 2007 Conference, June 17-21, Orlando, FL
  3. Hanju Cha, Jungwan Choi and P. Enjeti, “A New Three-phase High power Current-fed DC/DC Converter with Active clamp for Low voltage Fuel cell Applications”, Accepted for presentation, IEEE PESC 2007 Conference, June 17-21, Orlando, FL
  4. L. Palma and P. Enjeti, “Analysis of Common Mode Voltage in Fuel Cell Power Conditioners Connected to Electric Utility”, IEEE ICIT 2006 Conference, Mumbai, India
  5. Asimmoaei, L.; Aeloiza, E.; Kim, J.H.; Enjeti, P.; Blaabjerg, F.; Moran, L.T.; Sul, S.K.; An interleaved active power filter with reduced size of passive components  Applied Power Electronics Conference and Exposition, 2006. APEC '06. Twenty-First Annual IEEE 19-23 March 2006 Page(s):8 pp.
  6. Duran-Gomez, J.L.; Garcia-Cervantes, E.; Lopez-Flores, D.R.; Enjeti, P.N.; Palma, L.;Analysis and evaluation of a series-combined connected boost and buck-boost dc-dc converter for photovoltaic application Applied Power Electronics Conference and Exposition, 2006. APEC '06. Twenty-First Annual IEEE 19-23 March 2006 Page(s):7 pp.
  7. L. Palma; M. Todorovic, P. Enjeti, “Analysis of DC-DC Converter stability in fuel cell powered portable electronic systems”, IEEE PESC 2006 Conference, June 2006
  8. M. Todorovic, L. Palma, P. Enjeti, “Hybrid DC-DC converter for fuel cell powered laptop computers”, IEEE PESC 2006 Conference, June 2006
  9. L. Palma.; M. Todorovic,; P. Enjeti; “Design considerations for a fuel cell powered dc-dc converter for portable applications”, Applied Power Electronics Conference and Exposition, 2006. APEC '06. Twenty-First Annual IEEE 19-23 March 2006 Page(s):6 pp.
  10. L. Palma, M. Todorovic and P. Enjeti, “Design Considerations for a Fuel Cell Powered DC-DC Converter for Portable Applications”, Small Fuel Cells Conference, April 2006.
  11. L. Palma, M. Todorovic and P. Enjeti, “New Power Distribution System for Laptop Computers with Small Fuel Cells”, Small Fuel Cells Conference, April 2005.
  12. Harfman Todorovic, M.; Palma, L.; Enjeti, P.;, “Development of new web-based materials to teach power electronics courses, Power Electronics Education, 2005. IEEE Workshop, June 16-17, 2005 Page(s):9 - 14
  13. A carrier-based PWM method with optimal switching sequence for a multi-level four-leg VSI Jang-Hwan Kim; Seung-Ki Sul; Enjeti, P.N.; Industry Applications Conference, 2005. Fourtieth IAS Annual Meeting. Conference Record of the 2005, Volume 1,  2-6 Oct. 2005 Page(s):99 - 105 Vol. 1
  14. Aeloiza, E.; Durrani, Y.; Rayner, M.; Gopinath, R.; Enjeti, P.; “A robust 18-pulse rectifier for adjustable speed drive systems, Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE, Volume 1,  6-10 March 2005 Page(s):665 - 669 Vol. 1
  15. Aeloiza, E.; Jang-Hwan Kim; Enjeti, P.; Ruminot, P.; “A Real Time Method to Estimate Electrolytic Capacitor Condition in PWM Adjustable Speed Drives and Uninterruptible Power Supplies”, Power Electronics Specialists, 2005 IEEE 36th Conference on, June 12, 2005 Page(s):2867 - 2872
  16. Palma, L.; Todorovic, M.H.; Enjeti, P.; “A High Gain Transformer-Less DC-DC Converter for Fuel-Cell Applications”, Power Electronics Specialists, 2005 IEEE 36th Conference on, June 12, 2005 Page(s):2514 - 2520
  17. Durrani, Y.; Aelioza, E.; Palma, L.; Enjeti, P.; “An Integrated Silicon Carbide (SiC) Based Single Phase Rectifier with Power Factor Correction” Power Electronics Specialists, 2005 IEEE 36th Conference on June 12, 2005, Page(s): 2810 - 2816 
  18. Jeraputra, C.; Aeloiza, E.C.; Enjeti, P.N.; Choi, S.; “An improved anti-islanding algorithm for utility interconnection of multiple distributed fuel cell powered generations” Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE Volume 1,  6-10 March 2005 Page(s):103 - 108 Vol. 1
  19. Woojin Choi; Enjeti, P.N.; Appleby, A.J; “An advanced power converter topology to significantly improve the CO tolerance of the PEM fuel cell power systems”.; Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE Volume 2,  3-7 Oct. 2004 Page(s):1185 - 1191 vol.2
  20. S. Ratanapanachote, H. J. Cha, P. Enjeti, “A digitally controlled switched mode power supply”, IEEE Power Electronics Specialist Conference, PESC 2004, June 2004
  21. Yu Jin Song, P. Enjeti, “A High Frequency Link Direct DC-AC Converter for Residential Fuel Cell Power Systems”, ”, IEEE Power Electronics Specialist Conference, PESC 2004, June 2004
  22. Harfman Todorovic, M., Palma, L, Enjeti, P., “Design Of A Wide Input Range DC-DC Converter With A Robust Power Control Scheme Suitable For Fuel Cell Power Conversion”, IEEE Applied Power Electronics Conference 2004.
  23. P. Acharya, P. Enjeti and I.J. Pitel, “An advanced fuel cell simulator”, IEEE Applied Power Electronics Conference 2004.
  24. M. Abolhassani, P. Niazi, H. Toliyat, P. Enjeti, “A sensorless integrated doubly-fed electric alternator/active filter (IDEA) for variable speed wind energy system”, Industry Applications Conference, 2003. 38th IAS Annual Meeting, Volume:1, Oct. 2003, Pages: 507 - 514
  25. E. Aeloiza.; P. Enjeti.; L. Moran; I. Pitel, “Next generation distribution transformer: to address power quality for critical loads”, IEEE 34th Annual Power Electronics Specialist Conference, 2003. PESC '03. Volume: 3 , June 15-19, 2003, Pages:1266 – 1271
  26. Han Ju Cha; P. Enjeti, “A three-phase AC/AC high-frequency link matrix converter for VSCF applications”, IEEE 34th Annual Power Electronics Specialist Conference, 2003,Volume: 4 , June 15-19, 2003 Pages:1971 – 1976
  27. Palma, L.; Enjeti, P.; Howze, J.W.; “An approach to improve battery run-time in mobile applications with supercapacitors” Power Electronics Specialist, 2003. PESC '03. IEEE 34th Annual Conference on , Volume: 2 , 15-19 June 2003, Pages:918 – 923
  28. Choi, W.; Enjeti, P.; Howze, J.W. “Fuel cell powered UPS systems: design considerations”, Power Electronics Specialist, 2003. PESC '03. IEEE 34th Annual Conference on, Volume: 1 , 15-19 June 2003, Pages: 385 – 390