Dr werner wölfle

Adjunct Professor

Contact Information

Phone: 353 53 9170110
Fax: 353 53 9170101
Location: Convertec Ltd
                Whitemill Industrial Estate
                Wexford
Email:  wwolfleconvertec.ie   

Biography

Prof. Werner Hugo Wölfle was born in Bad Schussenried, Germany. He graduated from the University of Stuttgart in Germany in 1981 as a Diplom-Ingenieur in Electrical Engineering. He completed a PhD degree in Electrical Engineering at the National University of Ireland, Galway in 2003.  
He was a lecturer and lead researcher from 1981 to 1982 at the "Institut for Leistungselektronik und Anlagentechnik" at the University of Stuttgart, where he developed the first 20kW switch mode power converter with high voltage bipolar transistor technology for thin blade welding applications.  
He worked from 1982 to 1985 for Dornier Systems GmbH, where he adapted this technology for space applications. He was power systems and project manager for the high power conversion and control units for two payload experiments (MEDEA) for the SPACELAB  D1 Mission of the European Space Agency (ESA) and he also was the leading design engineer for the primary satellite power system for the X-Ray Observatory Satellite (ROSAT). 
From 1986 to 1989 he worked as a Research and Development Manager of industrial AC and DC power converters with Riester GmbH.  Since 1989 he is Managing Director of Convertec Ltd. in Ireland. Convertec develops high reliability power converters for industrial applications and renewable energy systems.

Supervised Researchers

Malhar Bhatt, Yuk Sum Wong

Projects

• High Efficiency and Power Density Inverter
• High Frequency Resonant Converters with Planar Magnetics
• Battery Charge Control for Emergency Back Up Systems
• Quasi-active Power Factor Correction: The Role of Variable Inductance
• Development of Parameter System for Battery Monitoring and Control

Publications

Books
W.G. Hurley, W.H. Wölfle, Transformers and Inductors for Power Electronics: Theory, Design and Applications, Wiley, Chichester, 2013.

Journals
L. Zhang, W.G. Hurley, W.H. Wölfle, “ A New Approach to Achieve Maximum Power Point Tracking for PV System with a Variable Inductor”, IEEE Trans. on Power Electronics (Special Issue on Microgrids), vol.  26, no. 4, pp. 1031–1037, April 2011.
W.G. Hurley, Y.S. Wong, W.H. Wölfle, “ Self-Equalization of Cell Voltages to Prolong the Life of VRLA Batteries in Standby Applications”, IEEE Trans. on Industrial Electronics, vol. 56, no 6, pp. 2115–2120, June 2009.
Y.S. Wong, W.G. Hurley, W. H. Wölfle, “ Charge Regimes for Valve-Regulated Lead-Acid Batteries: Performance Overview Inclusive of Temperature Compensation”, Journal of Power Sources, vol. 183, no. 2, pp. 783–791, September 2008.
M. Bhatt, W.G. Hurley, W. Wölfle, " A New Approach to Intermittent Charging of Valve-Regulated Lead-Acid Batteries in Standby Applications", IEEE Trans. on Industrial Electronics, vol. 52, no. 5, pp. 1337–1342, October 2005.
W.G. Hurley, M. Hynes, W. Wölfle, " PWM Control of a Magnetic Suspension System", IEEE Trans. on Education, vol. 47, no. 2, pp. 165–173, May 2004.
W. Wölfle, W.G. Hurley, " Quasi-Active Power Factor Correction with a Variable Inductive Filter: Theory, Design and Practice", IEEE Trans. on Power Electronics, vol. 18, no. 1, pp. 248–255, January 2003.
W.G. Hurley, W. Wölfle, J. Breslin, " Optimized Transformer Design: Inclusive of High Frequency Effects", IEEE Trans. on Power Electronics, vol. 13, no. 4, pp. 651–659, July 1998.
W.G. Hurley, W. Wölfle, " Electromagnetic Design of a Magnetic Suspension System", IEEE Trans. on Education, vol. 40, no. 2, pp. 124–130, May 1997.
J. Rapp, W. Wölfle, "Erdströme als Ursache von Setzlingsverlusten in einer Forellenzucht", Tierärtzliche Prax. vol.14, no. 4, pp. 535–542, 1986. Trans.: "Earth Currents as a Cause of Fry Losses in a Trout Breed"
W. Wölfle, R. Veigel, "Die Konstruktion von zuverlässigen Streomversorgungen" Elektronik Praxis, 1987. Transl.: "The Construction of Reliable Power Supplies".
W. Wölfle, " Vermeidung des akustischen Rückkoppungspfeiffens", Fermeldepraxis, 1969. Transl.: "How to Avoid Acoustic Feedback Noise". 

Patents
W.H. Wölfle, W.G. Hurley, Y.S. Wong, "Battery Charger and Method", European Patent No. 2065997, July 2011, US Patent Application 2009/0140697, June 2009.
W.H. Wölfle, E. Hinterleitner, "Einstufige Stromversorgung mit Sinusförmigem Eingangsstrom", Deutsches Patentamt Reg No: 20 2004 016 174.5/Schaltnetzteil, March 2005. Trans.: "Single Stage Power Supply with Sinusoidal Mains Current".

Confrences
L. Zhang, W.G. Hurley, W.H. Wölfle, M.C. Duffy, “A Optimized Design of LLC Resonant Converters Incorporating Planar Magnetics”, Proceedings of the 28th IEEE Applied Power Electronics Conference, APEC’13, Long Beach, California, pp. 1683–1688, March 2013.
L. Zhang, W.G. Hurley, W.H. Wölfle, “A New Approach to Achieve Maximum Power Point Tracking for PV System with a Variable Inductor”, 2nd International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2010, Hefei, China, June 2010.
Y.S. Wong, W.G. Hurley, W.H. Wölfle, "Temperature Compensation Algorithm for Interrupted Charge Control Regime for a VRLA Battery in Standby Applications", 23rd IEEE Applied Power Electronics Conference, APEC’08, Austin, Texas, pp. 1278–1283, February 2008.
M. Bhatt, W. Wölfle, W.G. Hurley, "Ladung und Ladungserhatung bei Blei Akkumulatoren fuer Standby-Anwendungen durch geregelte Ladeunterbrechung und Pulsstromsteuerung", Desing&Elektronik Entwicklerforum, Batterien, Ladenkonzepte & Stromversorgungsdesign, Munich, Germany, March 2004.
M. Bhatt, W.G. Hurley, W. Wölfle, "A New Approach to Intermittent Charging of Valve-Regulated Lead-Acid Batteries in Standby Applications", 34th IEEE Power Electronics Specialists Conference, PESC’03, Acapulco, Mexico, vol. 2, pp. 895–900, June 2003.
W. Wölfle, W.G. Hurley, "Power Factor Correction and Harmonic Filtering for AC/DC Converters", 28th IEEE Industrial Electronics Conference, IECON'02, Seville, Spain, pp. 3238–3243, (Invited paper), November 2002.
M. Bhatt, W.G. Hurley, W. Wölfle, "Battery Charge Control for Emergency Back-Up Systems", 37th Universities Power Engineering Conference, UPEC 2002, Staffordshire University, pp. 411–415, September 2002.
U. Reghelin, W.G. Hurley, W. Wölfle, "Quasi-Active Power Factor Correction with a Variable Inductive Filter: Finite Element Analysis", 37th Universities Power Engineering Conference, UPEC 2002, Staffordshire University, pp. 431–435, September 2002.
W. Wölfle, W.G. Hurley, S. Lambert, "Quasi-active Power Factor Correction: the Role of Variable Inductance", IEEE Power Electronics Specialists Conference, PESC'01, Vancouver, Canada, vol. 4, pp. 2078–2083, June 2001.
W. Wölfle, W.G. Hurley, S. Arnold, "Power Factor Correction for AC-DC Converters with Cost Effective Inductive Filtering", IEEE Power Electronics Specialists Conference, PESC'00, Galway, Ireland, pp. 332–337, June 2000.
M. Butler, W.G. Hurley, W. Wölfle, "Active Power Factor Correction of a Single Stage AC-DC Converter with Reactive Power Control", 7th European Conference on Power Electronics and Applications, EPE'97, Trondheim, Norway, vol. 1, pp. 176–181, September 1997.
M. Butler, W.G. Hurley, W. Wölfle, "A Novel Scheme for Active Power Factor Correction of a Single-stage AC-DC Converter", 31st Universities Power Engineering Conference, UPEC'96, Crete, vol. 1, pp. 421–424, September 1996.
W.G. Hurley, W. Wölfle, "Optimizing the Design of Transformers at High Frequencies", 27th Universities Power Engineering Conference, UPEC’92, University of Bath, vol. 1, pp. 282–285, September 1992.

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