Dr Maeve Duffy (MIEEE)

Lecturer
Course Director BE Electronic Engineering/BE Electrical & Electronic Engineering

Contact Information

Phone: 353 91 493972 (Ext: 3972)
Fax: 353 91 494588
Location: Engineering Building, 3rd floor, Room 3046 
Email: maeve.duffynuigalway.ie

Research Interests

Magnetic component design, Wearable power generators, Wireless powering, Sensors

Biography

Dr. Maeve Duffy graduated from NUI Galway with a B.E. in Electronic Engineering in 1992, and with a PhD in 1997. The title of her PhD thesis was Modelling and Analysis of Planar Magnetic Devices. From 1997 - 2001, she was employed as a research officer with PEI Technologies in NMRC, Cork where she was involved in the design of magnetic components for fabrication in different interconnect technologies, including PCB, thick film and thin film on silicon. Since then, she has been lecturing in the Electrical & Electronic Engineering in NUI Galway. She currently has four postgraduate students working in the areas of magnetic component design for VRM applications and electromagnetic generator design for power harvesting. She has spoken at several industry seminars on the topics of magnetic component design and magnetic sensors.

Supervised Researchers

Christina Collins, Damien Carroll, Ana Cimpian, Ciaran Feeney, Sean Kelly, Migle Makelyte, David Newell, Furqan Noor 

Projects

• Wearable, Wireless Neurostimulator (2013-
• Power conversion & energy management for DSSC powered wireless sensors (2013-
• Energy Harvesting for Portable Home Health Applications (2011-
• Development of Distributed Inductors on Silicon for Power Supply on a Chip (PSoC) Applications (2011-
• Optimisation of Commercial Buildings: Power Electronics (2011)
• Investigation of Piezoelectric Based Power Harvesting Systems for Integration in the Road (2010)
• Electroplated Magnetic Materials for Shielding in PCB (2009-
• Development of a Leadless Cardiac Pacing Device (2008-
• Capacitive Sensor for Detecting Cough (2007-2009)
• Industry Led Research Programme in Power Electronics - Magnetics (2006-2008)
• Integration of Wearable Power Generator Structures (2004-2007)
• Miniaturised Electromagnetic Generators for Portable Applications (2002-2013)
• Planar Inductor Design (2002-2010)

Publications

Journals
D. Carroll, M. Duffy, " Modelling, Design, and Testing of an Electromagnetic Power Generator Optimized for Integration into Shoes", Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, vol. 226, no. 2, pp 256–270. February 2012.
M. Duffy, S. Kulkarni, S. Roy, " Improved Shielding Performance Using High Permeability Electroplated Thin Films in Printed Circuit Boards", IEEE Transactions on Magnetics, vol. 47, no. 10, pp. 4282–4285, October 2011. .
C. Collins, M. Duffy, " Limits and Opportunities for Distributed Inductors in High Current, High Frequency Applications", IEEE Transactions on Power Electronics, vol. 25, no. 11, pp. 2710–2721, November 2010.
C. Collins, M. Duffy, " Distributed (Parallel) Inductor Design for VRM Applications", IEEE Trans. on Magnetics, vol. 41, no. 10, pp. 4000-4002, October 2005.
M. C. Duffy, S. C. Tang, P. Ripka, " Application of Fluxgate Excitation Circuit with Saturable Inductor to Magnetic Sensing", Sensors and Actuators A: Physical, vol. 123-124, pp. 430-437, September 2005.
P. Ripka, J. Kubik, M. Duffy, W. G. Hurley, S. O'Reilly, " Current Sensor in PCB Technology", IEEE Sensors Journal, vol. 5 no. 3, pp. 433-438, June 2005.
S. C. Ó Mathúna, P. Byrne, G. Duffy, W. Chen, M. Ludwig, T. O'Donnell, P. McCloskey, M. Duffy, " Packaging and Integration Technologies for Future High-Frequency Power Supplies", IEEE Trans. on Industrial Electronics, vol. 51, no. 6, pp. 1305-1312, December 2004.
S.C. Tang, M. Duffy, P. Ripka, W. G. Hurley, " Excitation Circuit for Fluxgate Sensor Using Saturable Inductor", Sensors and Actuators A:Physical, vol. 113, no. 2, pp. 156-165, July 2004.
V. Leonavicius, M. Duffy, U. Boeke, S. C. Ó Mathúna, " Comparison of Realization Techniques for PFC Inductor Operating in Discontinuous Conduction Mode", IEEE Trans. on Power Electronics, vol. 19, No. 2, pp. 531-541, March 2004.
M. Ludwig, M. Duffy, T. O'Donnell, P. McCloskey, S. C. Ó Mathúna, " Design Study for Ultraflat PCB-integrated Inductors for Low-power Conversion Application’s”, IEEE Trans. on Magnetics, vol. 39, no. 5, pp. 3193-3195, September 2003.
M. Ludwig, M. Duffy, T. O'Donnell, P. McCloskey, S. C. Ó Mathúna, " PCB Integrated Inductors for Low Power dc/dc Converter", IEEE Trans. on Power Electronics, vol. 18, no. 4, pp. 937-945, July 2003.
D. de Bhailis, C. Murray, M. Duffy, J. Alderman, G. Kelly, S. C. Ó Mathúna, " Modelling and Analysis of a Magnetic Microactuator", Sensors and Actuators A-Physical, vol. 81, no. 1-3, pp. 285-289, April 2000.
S. O'Reilly, M. Duffy, T. Ott, T. O'Donnell, P. McCloskey, C. Ó Mathúna, " Characterisation of Embedded Filters in Advanced Printed Wiring Boards", Microelectronics Reliability, vol. 41, no. 6, pp. 781-788, June 2001.
S. O'Reilly, M. Duffy, T. O'Donnell, S. C. Ó Mathúna, " New Integrated Planar Magnetic Cores for Inductors and Transformers Fabricated in MCM-L Technology", International Journal of Microcircuits and Electronic Packaging, vol. 1, no.1, pp 62-69, 1st Quarter, 2000.
W. G. Hurley, M. C. Duffy, S. O'Reilly, S. C. Ó Mathúna, " Impedance Formulas for Planar Magnetic Structures with Spiral Windings", IEEE Trans. on Industrial Electronics, vol. 46, no. 2, pp. 271-278, April 1999.
S. O'Reilly, S. C. Ó Mathúna, M. C. Duffy, W. G. Hurley, " A Comparative Analysis of Interconnection Technologies for Integrated Multilayer Inductors", Microelectronics International: Journal of the International Society for Hybrid Microelectronics, vol. 15, no. 1, pp. 6-10, January 1998.
W. G. Hurley, M. C. Duffy, " Calculation of Self and Mutual Impedances in Planar Sandwich Structures", IEEE Trans. on Magnetics, vol. 33, no. 3, pp. 2282-2290, May 1997.
W. G. Hurley, M. C. Duffy, " Calculation of Self and Mutual Impedances in Planar Magnetic Structures", IEEE Trans. on Magnetics, vol. 31, no. 4, pp. 2416-2422, July 1995.

Patents
M. Duffy, W. G. Hurley, P. Ripka, S. C. Tang, "Excitation Circuit for a Fluxgate Sensor", NAT101/C/US, Patent No 6,867,587, March 2005.
S. O’Reilly, M. Duffy, T. O’Donnell, S. C. Ó Mathúna, "Magnetic Components and their Production", US Patent No. 6,150,915, November 2000.

Conferences
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.
C. Feeney, N. Wang, S.C. O’Mathuna, M. Duffy, "Advantages of Paralleling Inductors-on-Silicon in High Frequency Power Converters", Proceedings of the 28th IEEE Applied Power Electronics Conference, APEC'13, Long Beach, California, March 2013.
A. Cimpian, B. Granier, G. O’Laighin, M. Duffy, "Comparison of Energy Harvesting Techniques for Wearable Activity Monitoring Devices", Proceedings of the Biodevices 2013 Conference, Barcelona, January 2013.
C. Feeney, M. Duffy, N. Wang, S. Roy, S. Kulkarni, J. Hannon, K. McCarthy, S.C. O’Mathuna, "Advantages of Paralleling Inductors-on-Silicon in High Frequency Buck Converters", Poster presentation, PowerSoc 2012, San Francisco, November 2012. M. Duffy, S. Kulkarni, S. Roy, W.M. Ng, R. Hui, "Investigating the Scope for Electroplated Magnetic Alloys in Shielding of PCBs", Proceedings of the IEEE Energy Conversion Congress and Expo., ECCE 2012, Rayleigh, North Carolina, September 2012.
C. Feeney, M. Duffy, "Comparison of Light-load Improvement Techniques for Low Power Buck Converters", Proceedings of UPEC 2012, London, September 2012.
M. Duffy, S. Kulkarni, S. Roy, ’Improved shielding performance using high permeability electroplated thin films in Printed Circuit Boards’, Proceedings of Intermag 2011, Taipei, April 2011.
F. Noor, M. Duffy, "Optimum core-winding ratio for a receiver coil in a biomedical inductive power system", Proceedings of Biodevices 2011, Rome, January 2011.
C. Collins, M. Duffy, "Improving the light-load efficiency of VRMs using parallel inductors", IEEE Energy Conversion Congress and Expo, Atlanta, September 2010.
F. Noor, M. Duffy, "Amplifier design of a biomedical inductive power system", IET Irish Signals and Systems Conference, ISSC, Cork, June 2010.
F. Noor, M. Duffy, "Effect of a magnetic core in the receiver coil of a biomedical inductive power system", IEEE Engineering in Medicine and Biology Conference, EMBC 2009, Minneapolis, September 2009.
M. Duffy, C. Collins, F. M. F. Rhen, P. McCloskey, S. Roy, “High Current Inductor Design for MHz Switching”, 38th IEEE Power Electronics Specialists Conference, PESC’08, Rhodes, Greece, pp. 2672–2677, June 2008.
S. Kelly, C. Collins, M. Duffy, F. Rhen, S. Roy, "Core Materials for High Frequency VRM Inductors", 38th IEEE Power Electronics Specialists Conference, PESC’07, Orlando, Florida, USA, 1767–1772, June 2007.
D. Carroll, M. Duffy, "Demonstration of Wearable Power Generator", 11th European Conference on Power Electronics and Applications, EPE’05 Dresden, Germany, paper no. 884, CD ROM, September 2005.
D. Carroll, M. Duffy, "Maximising Power from Wearable Electromagnetic Generators", 40th Universities Power Engineering Conference, UPEC'05, University College Cork, paper no. 268, CD ROM, pp. 475–479, September 2005.
N. Popa, M. Duffy, "Design of a Wearable Generator with a Magnetic Core", 40th Universities Power Engineering Conference, UPEC'05, University College Cork, paper no. 193, CD ROM, pp. 745–749, September 2005.
C. Collins, M. Duffy, "Custom Core Design for Distribute (parallel) Inductor Design for VRM applications", 40th Universities Power Engineering Conference, UPEC'05, University College Cork, paper no. 192, CD ROM, pp. 1141–1145, September 2005.
C. Collins, M. Duffy, "Distributed Inductor Design for VRM Applications", Intermag 2005, Nagoya, Japan, May 2005.
M. Duffy, S. C. Tang, P. Ripka, "Application of Fluxgate Excitation Circuit to Magnetic Sensing", Eurosensors XVII, Rome, Italy, September 2004.
V. Leonavièius, M. Duffy, S. C. Ó Mathúna, "Planar Controlled-Leakage-Inductance Transformer with Magnetic Shunt – Application in Resonant AC/DC Converter", Proceedings of EPE – PEMC '04, Riga, Latvia, September 2004.
D. Carroll, M. Duffy, "Electromagnetic Generators for Power Harvesting", 35th IEEE Power Electronics Specialists Conference, PESC’04, Aachen, Germany, vol. 3, pp. 2075–2081, June 2004.
C. Collins, M. Duffy, "Investigation of Passive Component Size in VRMs", 35th IEEE Power Electronics Specialists Conference, PESC’04, Aachen, Germany, vol. 6, pp. 4340-4346, June 2004.
C. Collins, M. Duffy, "Analysis of Inductor Performance for VRM Applications", 38th Universities Power Engineering Conference, UPEC'03, Aristotle University, Thessaloniki, Greece, September 2003.
D. Carroll, M. Duffy, "Power Harvesting for Wearable Electronics"; 38th Universities Power Engineering Conference, UPEC'03, Aristotle University, Thessaloniki, Greece, September 2003.
S. C. Ó Mathúna, P. Byrne, G. Duffy, W. Chen, M. Ludwig, T. O’Donnell, P. McCloskey, M. Duffy, “Packaging and Integration Technologies for Future High Frequency Power Supplies”, 28th Annual Conference of the IEEE Industrial Electronics Society, Sevilla, Spain, November 2002.
S. C. Tang, M. C. Duffy, P. Ripka, W. G. Hurley, "Excitation Circuit for Fluxgate Sensor Using Saturable Inductor", 16th European Conference on Solid-State Transducers, Eurosensors XVI, Prague, Czech Republic, MP66, pp. 159–160, September 2002 (Best Poster Prize).
P. Ripka, J. Kubik, M. Duffy, W. G. Hurley, S. O’Reilly, "Current Sensor in PCB Technology", 1st IEEE International Conference on Sensors, IEEE Sensors '02, Kissimmee, FL, vol. 2, pp. 779–784, June 2002.
V. Leonavicius, M. Duffy, S. C. Ó Mathúna, U. Boeke, “Comparison of Different Techniques to Realize PFC Boost Inductor”, IEEE Applied Power Electronics Conference – APEC’02, Dallas, TX, vol. 2, pp. 1183-1189, March 2002.
M. Ludwig, M. Duffy, T. O’Donnell, S. C. Ó Mathúna, “PCB Integrated Inductor for Low Power DC/DC Converter”, IEEE Applied Power Electronics Conference – APEC’02, Dallas, TX, vol. 1, pp. 319-325, March 2002.
M. Duffy, L. Floyd, P. McCloskey, S. C. Ó Mathúna, K. Tellefsen, M. Liberatore, A. Sreeram, “RF Characterisation of No-clean Solder Flux Residues”, IMAPS-US '01, Baltimore, MD, October 2001. [SPIE Proceedings Series, vol. 4587, pp. 138-143, 2001].
C. Quinn, K. Rinne, T. O'Donnell, M. Duffy, S. C. Ó Mathúna, “A Review of Planar Magnetic Techniques and Technologies”, IEEE Applied Power Electronics Conference – APEC’01, Anaheim, CA, vol. 2, pp. 1175-1183, March 2001.
S. O’Reilly, M. Duffy, P. McCloskey, S. C. Ó Mathúna, “Realisation of LC Demonstrators in MCM-L
Technology”, IMAPS-Europe '00, Czech Republic, pp. 7-12, June 2000.
M. Duffy, S. O'Reilly, T. O'Donnell, P. Friesen, P. McCloskey, S. C. Ó Mathúna, “MCM-L Integrated Transformers for Low Power Applications”, IEEE Power Electronics Specialists Conference, PESC’00, Galway, Ireland, vol. 1, pp. 302-307, June 2000.
M. Duffy, T. O'Donnell, S. O'Reilly, S. C. Ó Mathúna, P. McCluskey, W. G. Hurley, "Comparison of Integrated Component Technologies for Power Conversion Applications", 4th International Power Electronics Conference, IPEC'00, Tokyo, Japan, pp. 309–314, April 2000. (Invited Paper)
D. De Bhailis, T. O'Donnell, P. McCloskey, S. O'Reilly, M. Duffy, S. C. Ó Mathúna, “Use of High Aspect Ratio Coils for RF Inductors”, IMAPS-US '99, Chicago, IL, October 1999. [SPIE Proceedings Series, vol. 3906, pp. 177-182, 1999]
S. O'Reilly, M. Duffy, C. Ó Mathúna, A. Madou, L. Martens, D. Corlatan, E. Raedschelders, P. De Langhe, E. Langkabel, “Mixed Component Integration in MCM-L Technology”, CARTS Europe ’99, Lisbon, Portugal, pp. 113-118, October 1999.
M. Duffy, M. Meinhardt, T. O'Donnell, S. O'Reilly, J. Flannery, S. C. Ó Mathúna, “New Method for Integration of Inductor and Transformer on a Standard Core - Comparison with Equivalent Discrete Parts”, PCIM’99, Nuremberg, Germany, pp. 117-122, June 1999.
S. O'Reilly, M. Duffy, T. O'Donnell, C. Ó Mathúna, M. Scott, N. Young, S. Payne, “Integration of a Range of RF Chip Inductors in Advanced Printed Circuit Board Technology”, IMAPS-Europe ’99, Harrogate, UK, pp. 363-369, June 1999.
M. Duffy, S. O'Reilly, T. O'Donnell, S. C. Ó Mathúna, “Analysis of the Performance of Integrated Inductors (Fabricated in MCM-L Technology) in RF Amplifier Applications”, Electronic Components and Technology Conference, ECTC’99, San Diego, CA, pp. 668-675, June 1999.
M. Meinhardt, M. Duffy, T. O'Donnell, S. O'Reilly, J. Flannery, S. Ó Mathúna, “New Method for Integration of Resonant Inductor and Transformer - Design, Realisation and Measurements”, IEEE Applied Power Electronics Conference - APEC'99, Dallas, TX, pp. 1168-1174, March 1999.
S. O'Reilly, M. Duffy, C. Ó Mathúna, E. Raedschelders, D. Corlatan, A. Madou, L. Martens, “Mixed Component Integration in Advanced Printed Wiring Boards”, EC-MCM '99, London, UK pp. 8-17, February 1999.
D. de Bhailis, C. Murray, M. Duffy, J. Alderman, G. Kelly, S. C. Ó Mathúna, “Modelling and Analysis of a Magnetic Microactuator for use as a Micropump” 9th Micromechanics Europe, MME’98, Ulvik, Norway, pp. 256-259, 1998.
S. O'Reilly, M. Duffy, S. C. Ó Mathúna, S. Payne, “Routes to Embedded Inductors in MCM-L Technology - Design, CAD, and Manufacturing Issues”, IMAPS-US '98, San Diego, CA, November 1998. [SPIE Proceedings Series, vol. 3582, pp. 435-440, 1998].
W. G. Hurley, M. C. Duffy, S. O'Reilly, S. C. Ó Mathúna, "Impedance Formulas for Planar Magnetic Structures with Spiral Windings", IEEE Power Electronics Specialists Conference, PESC'97, St. Louis, MO, pp. 627–633, June 1997.
S. O'Reilly, S. C. Ó Mathúna, M. C. Duffy, W. G. Hurley, "A Comparative Analysis of Interconnection Technologies for Integrated Multilayer Inductors", 11th European Microelectronics Conference, Venice, Italy, pp. 427–435, May 1997.
M. C. Duffy, W. G. Hurley, "High Frequency Effects in Planar Magnetics: Inclusive of Skin Effect", IEEE Power Electronics Specialists Conference, PESC'95, Atlanta GA, pp. 645–650, June 1995.
M. C. Duffy, W. G. Hurley, "High Frequency Effects in Planar Magnetic Structures", 29th Universities Power Engineering Conference, UPEC’94, University College Galway, vol. 1, pp. 244–247, September 1994.
M. C. Duffy, W. G. Hurley, "Inductance Calculations for Planar Magnetics", 28th Universities Power Engineering Conference, UPEC’93, Staffordshire University, vol. 1, pp. 34–37, September 1993.

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