Professor Antonio Griffo
PhD, MSc
School of Electrical and Electronic Engineering
Professor of Power Electronics and Electric Drives
a.griffo@sheffield.ac.uk
+44 114 222 5050
+44 114 222 5050
Full contact details
Professor Antonio Griffo
School of Electrical and Electronic Engineering
School of Electrical and Electronic Engineering
- Profile
-
I received my MSc in Electronic Engineering and PhD in Electrical Engineering from the University of Naples in Italy in 2003 and 2007, respectively.
After completing my PhD on power systems stability and power quality improvement using power electronics based controllers in Flexible AC Transmission Systems (FACTS), I moved to the UK.
Here I worked as researcher at the Universities Bristol and Sheffield, where I was appointed Lecturer in 2013.
I have worked on a large number of projects involving the modelling, design, optimisation and control of power electronics and motor drives for applications including automotive, aerospace and renewables.
I developed modeling methods to analyse the dynamics of hybrid AC/DC power systems such as those proposed for the “More electric aircraft”, designed advanced control methods for motor drives including novel sensor-less techniques for aircraft starter/generators and developed methods for Hardware and Power-Hardware-in-the-Loop real-time simulation and testing of electrical drives.
I am actively researching the use of SiC-based converters for aerospace and renewables applications.
As electrical technologies become more widespread in novel applications where reliability is a primary concern, such as future more and all-electric aircrafts, I’ve become involved in several projects related to the modelling and detection of faults in permanent magnet machines and power converters.
In particular, I am interested in the development of signal acquisition and processing techniques for real-time monitoring of the state of health of machine insulation, bearings and power electronics converters, with the aim of detecting degradation and faults and predicting the lifetime of components.
- Qualifications
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- PhD (Electrical Engineering), University of Naples, 2007
- MSc (Electronic Engineering), University of Naples, 2003
- Research interests
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- Advanced control of electric drives and power electronics converters
- SiC power electronics converters in transportation and renewable applications
- Reliability, fault modelling and fault detection in permanent magnet machines and power converters
- On-line monitoring of the state of health of machines and converters, diagnosis and prognosis of faults
- Sensorless control of permanent magnet brushless dc and ac drives
- Modelling and stability analysis of AC and hybrid AC/DC power systems
- Power management in microgrids
- Power electronics and systems for vehicular applications
- More electric aircraft technologies
- Thermal modelling and thermal monitoring of electric machines and converters
- Parameters estimation in electric drives
- Real time modelling and hardware in the loop testing methodologies
- Publications
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Journal articles
- PWM-based speed and position estimations for permanent magnet synchronous machines. Applied Sciences, 15(18). View this article in WRRO
- Cyber-physical real-time digital simulation for cybersecurity analysis in microgrids. IEEE Transactions on Industrial Cyber-Physical Systems, 3, 429-441. View this article in WRRO
- A passive filter for mitigating neutral-point voltage stress in inverter-fed drives. IEEE Transactions on Energy Conversion, 40(2), 1388-1399. View this article in WRRO
- Partial discharge in silicone gel on power module substrates in high-humidity conditions. IEEE Transactions on Dielectrics and Electrical Insulation, 32(1), 484-493. View this article in WRRO
- Impact of close proximity pulse width modulation switching events on electric machine terminal voltages. IET Electric Power Applications, 18(11), 1458-1468. View this article in WRRO
- Novel stator slot opening to reduce electrical machine bearing currents. IEEE Transactions on Magnetics, 59(11). View this article in WRRO
- Experimental ball bearing impedance analysis under different speed and electrical conditions. IEEE Transactions on Dielectrics and Electrical Insulation, 30(3), 1312-1321. View this article in WRRO
- High frequency modelling of electric machines using finite element analysis derived data. IEEE Transactions on Industrial Electronics.
- A novel embedded sensor for partial discharge detection in inverter-fed machines. IEEE Transactions on Industry Applications, 58(4), 4698-4707. View this article in WRRO
- Evaluation of waste heat recovery of electrical powertrain with electro-thermally coupled models for electric vehicle applications. Chinese Journal of Electrical Engineering, 7(3), 88-99. View this article in WRRO
- Holistic modeling of high frequency behavior of inverter-fed machine winding, considering mutual couplings in time domain. IEEE Transactions on Industry Applications, 57(6), 6044-6057. View this article in WRRO
- Anti-resonance phenomenon and peak voltage stress within PWM inverter fed stator winding. IEEE Transactions on Industrial Electronics, 68(12), 11826-11836.
- Reduced-order thermal observer for power modules temperature estimation. IEEE Transactions on Industrial Electronics, 67(12), 10085-10094. View this article in WRRO
- Online thermal parameter identification for permanent magnet synchronous machines. IET Power Electronics, 14(12), 2340-2347. View this article in WRRO
- PWM-based flux linkage and rotor temperature estimations for permanent magnet synchronous machines. IEEE Transactions on Power Electronics, 35(6), 6061-6069.
- Scaling effect on electromagnetic performance of surface mounted permanent magnet Vernier machine. IEEE Transactions on Magnetics, 56(5). View this article in WRRO
- A turn fault mitigation strategy based on current injection technique for a triple 3-phase PMA SynRM. IEEE Transactions on Industrial Electronics, 67(4), 2511-2522. View this article in WRRO
- Thermal modeling of hollow conductors for direct cooling of electrical machines. IEEE Transactions on Industrial Electronics, 67(2), 895-905. View this article in WRRO
- Multi-parameter model order reduction for thermal modelling of power electronics. IEEE Transactions on Power Electronics, 35(8), 8550-8558. View this article in WRRO
- Effective turn fault mitigation by creating zero sequence current path for a triple redundant 3x3-phase PMA SynRM. IEEE Transactions on Power Electronics, 34(11), 11080-11089. View this article in WRRO
- Stator turn fault modelling for a triple redundant 3x3-phase PMA SynRM. IEEE Transactions on Industrial Electronics, 66(6), 4220-4230. View this article in WRRO
- Investigation into Fault Tolerant Capability of a Triple Redundant PMA SynRM Drive. IEEE Transactions on Power Electronics, 34(2), 1611-1621. View this article in WRRO
- Permanent magnet synchronous machine stator windings fault detection by Hilbert–Huang transform. The Journal of Engineering, 2019(17), 3505-3509.
- Universal droop controller for DC–DC converter interfaces onto a modular multi‐tiered DC microgrid. The Journal of Engineering, 2019(17), 3469-3473.
- Detection of humidity ingress using online common‐mode insulation impedance‐monitoring system. The Journal of Engineering, 2019(17), 4411-4414.
- Experimental assessments of a triple redundant 9-phase fault tolerant PMA SynRM drive. IEEE Transactions on Industrial Electronics, 66(1), 772-783. View this article in WRRO
- On-line condition monitoring for diagnosis and prognosis of insulation degradation of inverter-fed machines. IEEE Transactions on Industrial Electronics, 66(10), 8126-8135. View this article in WRRO
- A general modelling technique for a triple redundant 3x3-phase PMA SynRM. IEEE Transactions on Industrial Electronics, 65(11), 9068-9078. View this article in WRRO
- Active thermal management for Interior Permanent Magnet Synchronous Machine (IPMSM) drives based on model predictive control. IEEE Transactions on Industry Applications, 54(5), 4506-4514. View this article in WRRO
- Stator turn fault detection by 2nd harmonic in instantaneous power for a triple redundant fault-tolerant PM drive. IEEE Transactions on Industrial Electronics, 65(9), 7279-7289. View this article in WRRO
- A fault tolerant machine drive based on permanent magnet assisted synchronous reluctance machine. IEEE Transactions on Industry Applications, 54(2), 1349-1359. View this article in WRRO
- Real-time Measurement of Temperature Sensitive Electrical Parameters in SiC Power MOSFETs. IEEE Transactions on Industrial Electronics, 65(3), 2663-2671. View this article in WRRO
- Real-Time Hardware-in-the-Loop Simulation of Permanent Magnet Synchronous Motor Drives under Stator Faults. IEEE Transactions on Industrial Electronics, 64(9), 6960-6969. View this article in WRRO
- A controller for single-phase parallel inverters in a variable-head pico-hydropower off-grid network. Sustainable Energy, Grids and Networks, 5, 114-124. View this article in WRRO
- A High-Fidelity and Computationally Efficient Electro-thermally Coupled Model for Interior Permanent-Magnet Machines in Electric Vehicle Traction Applications. IEEE Transactions on Transportation Electrification, 1(4), 336-347. View this article in WRRO
- Design and characterization of a three-phase brushless exciter for aircraft starter/generator. IEEE Transactions on Industry Applications, 49(5), 2106-2115.
- Derivation and Scaling of AC Copper Loss in Thermal Modeling of Electrical Machines. IEEE Transactions on Industrial Electronics, 61(8), 4412-4420.
- Large signal stability analysis of 'more electric' aircraft power systems with constant power loads. IEEE Transactions on Aerospace and Electronic Systems, 48(1), 477-489.
- Modeling and stability analysis of hybrid power systems for the more electric aircraft. Electric Power Systems Research, 82(1), 59-67.
- Sensorless starting of a wound-field synchronous starter/generator for aerospace applications. IEEE Transactions on Industrial Electronics, 59(9), 3579-3587.
- Compensation of inverter nonlinear distortion effects for signal-injection-based sensorless control. IEEE Transactions on Industry Applications, 47(5), 2084-2092.
- Control Lyapunov function for series and parallel compensators with energy storage capabilities. International Journal of Emerging Electric Power Systems, 9(5).
- Two-leg three-phase inverter control for STATCOM and SSSC applications. IEEE Transactions on Power Delivery, 23(1), 361-370.
- An optimal control strategy for power quality enhancement in a competitive environment. International Journal of Electrical Power and Energy Systems, 29(7), 514-525.
- Phasor dynamics influence on electric power system performances. International Journal of Emerging Electric Power Systems, 7(1), 1-19.
- Superconducting magnetic energy storage control strategy for power system stability improvement. International Journal of Emerging Electric Power Systems, 4(1).
- Optimal reclosure time for improving power-system dynamic behaviour. IEE Proceedings Generation Transmission and Distribution, 152(6), 939-944.
- RF power silicon-on-glass VDMOSFETs. IEEE Electron Device Letters, 25(6), 424-426.
- PWM-based Flux linkage estimation for permanent magnet synchronous machines. The Journal of Engineering. View this article in WRRO
- Fast simulation of transient temperature distributions in power modules using multi-parameter model reduction. The Journal of Engineering. View this article in WRRO
Book chapters
- Modeling and simulation of a pico-hydropower off-grid network, Modeling and Dynamic Behaviour of Hydropower Plants (pp. 225-253). Institution of Engineering and Technology
Conference proceedings
- A Novel 1D-CNN Open Circuit Fault Diagnosis for PMSM Drives Using Normalized Current Space Vector Sorting. 2024 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 6478-6483), 20 October 2024 - 24 October 2024.
- Fast Algorithm for Eliminating Common Mode Voltage in Dual Three-phase Inverter. 2024 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 3895-3901), 20 October 2024 - 24 October 2024.
- A versatile and low-cost approach to power electronics practical training. IET Conference Proceedings, Vol. 2024(3) (pp 653-658). Nottingham, United Kingdom, 10 June 2024 - 10 June 2024. View this article in WRRO
- A compact and modular remote access platform for enhanced practical education in power electronics, machines, and drives. IET Conference Proceedings, Vol. 2024(3) (pp 646-652). Nottingham, United Kingdom, 10 June 2024 - 10 June 2024. View this article in WRRO
- Image based, bearing fault diagnosis, using convolutional neural networks. IET Conference Proceedings, Vol. 2024(3) (pp 560-567)
- A New Analytical Model for Voltage Stress Analysis at Neutral Point of Stator Windings. 2023 26th International Conference on Electrical Machines and Systems (ICEMS) (pp 1364-1369), 5 November 2023 - 8 November 2023.
- Effect of Load on Impedance Characteristics of High Frequency Circulating Bearing Current Path in Stator Laminations for an Inverter Fed AC Machine. 2023 26th International Conference on Electrical Machines and Systems (ICEMS) (pp 952-957), 5 November 2023 - 8 November 2023.
- A novel modified archimedes spiral antenna for partial discharge detection in inverter-fed electrical machines. 2023 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) Proceedings. Newcastle upon Tyne, United Kingdom, 13 April 2023 - 13 April 2023. View this article in WRRO
- Insulation monitoring in ungrounded electrical system for more electric aircrafts. 2023 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) Proceedings. Newcastle upon Tyne, United Kingdom, 13 April 2023 - 13 April 2023. View this article in WRRO
- Novel Stator Slot Opening to Reduce Electrical Machine Bearing Currents. 2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers) (pp 1-2), 15 May 2023 - 19 May 2023.
- Multilevel SiC power module for 100 kW motor drive for aircraft application. IPOWER 4 – POWERING THE FUTURE
- An experimental assessment of the impact of high dv/dt SiC converters on insulation lifetime of electrical machines. 2022 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 1-8). Detroit, MI, USA, 9 October 2022 - 9 October 2022. View this article in WRRO
- Detection of partial discharge activity in thermally aged SiC inverter fed stator winding samples and impact of partial discharges on their lifetime. 11th International Conference on Power Electronics, Machines and Drives (PEMD 2022) (pp 271-277). Newcastle, UK (hybrid conference), 21 June 2022 - 21 June 2022. View this article in WRRO
- Modular design of a three-level SiC MOSFET power module for more-electric aircraft applications. 11th International Conference on Power Electronics, Machines and Drives (PEMD 2022) (pp 58-63). Newcastle, UK (hybrid conference), 21 June 2022 - 21 June 2022. View this article in WRRO
- Investigation of the impact of temperature and humidity on the capacitance of dielectric gel used for power electronics. 11th International Conference on Power Electronics, Machines and Drives (PEMD 2022) (pp 91-96). Newcastle, UK (hybrid conference), 21 June 2022 - 21 June 2022. View this article in WRRO
- A novel ring-shaped fractal antenna for partial discharge detection. Proceedings of the 2021 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 5111-5117). Vancouver, Canada, 10 October 2021 - 10 October 2021. View this article in WRRO
- IMPACT OF MAGNETIC COUPLING IN TRANSVERSE FLUX PERMANENT MAGNET MACHINE FOR WIND POWER APPLICATION. IET Conference Proceedings, Vol. 2020(7) (pp 759-764)
- SENSORLESS CONTROL FOR PERMANENT MAGNET SYNCHRONOUS MACHINE DRIVES CONSIDERING RESISTANCE ASYMMETRY. IET Conference Proceedings, Vol. 2020(7) (pp 914-919)
- Multivariable Generalized Predictive Speed Control for Permanent Magnet Synchronous Machine with Enhanced Luenberger Speed Observer. IET Conference Proceedings, Vol. 2020(7) (pp 1048-1053)
- Online Monitoring of Ground-wall Insulation Impedance under Cyclic Load Operation. IET Conference Proceedings, Vol. 2020(7) (pp 110-115)
- Prediction of Transient Voltage Distribution in Inverter-fed Stator Winding, Considering Mutual Couplings in Time Domain. 2020 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 517-524), 11 October 2020 - 15 October 2020.
- Frequency-domain based windings voltage distribution modelling for converter-fed electrical machines. 2020 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 525-532), 11 October 2020 - 15 October 2020.
- Design of Experiments for Stator Windings Insulation Degradation under High dv/dt and High Switching Frequency. 2020 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 789-795), 11 October 2020 - 15 October 2020.
- Challenges of Common Mode Current and Voltage Acquisition for Stator Winding Insulation Health Monitoring. 2020 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 4452-4459), 11 October 2020 - 15 October 2020.
- Peak Voltage Stress on Stator Winding in PWM Inverter fed Drives. 2020 International Conference on Electrical Machines (ICEM) (pp 1579-1585), 23 August 2020 - 26 August 2020.
- Full-SiC integrated power module based on planar packaging technology for high efficiency power converters in aircraft applications. CIPS 2020 - 11th International Conference on Integrated Power Electronics Systems. Berlin, Germany, 24 March 2020 - 24 March 2020. View this article in WRRO
- On-Line Motor Insulation Capacitance Monitoring Using Low-Cost Sensors. 2019 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 6996-7003), 29 September 2019 - 3 October 2019.
- Lifetime of Machines Undergoing Thermal Cycling Stress. 2019 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 3831-3836), 29 September 2019 - 3 October 2019.
- Influence of Demagnetization on Selecting the Optimum Slot/Pole Number Combination for 3MW Surface Mounted Permanent Magnet Vernier Machine. 2019 22nd International Conference on Electrical Machines and Systems (ICEMS) (pp 1-6), 11 August 2019 - 14 August 2019.
- Modelling framework for parallel SiC power MOSFETs chips in modules developed by planar technology. 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC). Nottingham, United Kingdom, 7 November 2018 - 7 November 2018. View this article in WRRO
- Modeling of inter-turn and inter-phase short-circuit of flux-switching permanent magnet motors. 2018 IEEE Energy Conversion Congress and Exposition (ECCE). Portland, USA, 23 September 2018 - 23 September 2018. View this article in WRRO
- Computationally efficient, electro-thermally coupled model for permanent magnet machines in electric vehicle traction applications. SAE Thermal Management Systems Symposium, TMSS 2017. Plymouth, MI, USA, 10 October 2017 - 10 October 2017. View this article in WRRO
- Comparative Study on Thermal Management Schemes with Waste Heat Recovery from Electric Vehicle Power Train. 2017 SAE Thermal Management Systems Symposium (TMSS), 10-12 Oct 2017.. Plymouth, MI, USA, 10 October 2017 - 10 October 2017. View this article in WRRO
- Active thermal management for Interior Permanent Magnet Synchronous Machine (IPMSM) drives. 2017 IEEE International Electric Machines and Drives Conference (IEMDC) (pp 1-8), 21 May 2017 - 24 May 2017.
- A fault tolerant machine drive based on permanent magnet assisted synchronous reluctance machine. Energy Conversion Congress and Exposition (ECCE), 2016 IEEE. Milwaukee, WI, USA, 18 September 2016 - 18 September 2016. View this article in WRRO
- High-fidelity modelling of permanent magnet synchronous motors for real-time hardware-in-the-loop simulation. 8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016) (pp 6 .-6 .)
- Permanent magnet generator turn fault detection using Kalman filter technique. 2016 IEEE Energy Conversion Congress and Exposition (ECCE) (pp 1-8), 18 September 2016 - 22 September 2016.
- Reliability assessment of fault tolerant permanent magnet AC drives. IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society (pp 002777-002782), 9 November 2015 - 12 November 2015.
- Overall assessments of dual inverter open winding drives. 2015 IEEE International Electric Machines & Drives Conference (IEMDC) (pp 1029-1035), 10 May 2015 - 13 May 2015.
- On-line monitoring of winding insulation health using high frequency common mode voltage from PWM. 2015 IEEE International Electric Machines & Drives Conference (IEMDC) (pp 1433-1439), 10 May 2015 - 13 May 2015.
- Experimental and analytical determination of proximity losses in a high-speed PM machine (pp 3504-3511-3504-3511)
- Computationally efficient modelling of permanent magnet synchronous motor drives for real-time Hardware-in-the-Loop simulation (pp 5368-5373-5368-5373)
- Control of parallel single-phase inverters in a low-head pico-hydro off-grid network (pp 1571-1576-1571-1576)
- Hardware in the loop emulation of synchronous generators for aircraft power systems. Electrical Systems for Aircraft Railway and Ship Propulsion Esars
- Hardware in the loop based synchronous generator emulation test rig for more electric aircraft power systems, Vol. 2012
- Scaling of AC copper loss in thermal modeling of electrical machines (pp 1424-1429-1424-1429)
- Design study of a three-phase brushless exciter for aircraft starter/generator. IEEE Energy Conversion Congress and Exposition Energy Conversion Innovation for A Clean Energy Future Ecce 2011 Proceedings (pp 3998-4004)
- The effect of magnetic saturation on sensorless control of a brushless permanent magnet motor under AC and DC excitation. IEEE Energy Conversion Congress and Exposition Energy Conversion Innovation for A Clean Energy Future Ecce 2011 Proceedings (pp 1582-1589)
- The influence of design parameters on sensorless position estimation of PMSM for zero and low speed. UK Magnetic Society Meeting on More Electric Aircraft. Bristol, UK, 2011.
- Stability analysis of "more electric" aircraft hybrid electrical power systems. International Conference on Electrical Machines and Systems, ICEMS 2011
- Design optimization of passive DC filters for aerospace applications. Power Electronics, Machines and Drives - 5th IET Conference(563 CP) (pp 1-6)
- Stability assessment of electric power systems for 'more electric' aircraft. 13th European Conference on Power Electronics and Applications, EPE '09
- A components library for simulation and analysis of aircraft electrical power systems using Modelica. 13th European Conference on Power Electronics and Applications, EPE '09
- State-space average modelling of synchronous generator fed 18-pulse diode rectifier. 13th European Conference on Power Electronics and Applications, EPE '09
- State-space average modeling of 18-pulse diode rectifier. 3rd International Conference 'From Scientific Computing to Computational Engineering'. Athens, Greece, 9 July 2008 - 12 July 2008.
- Stability analysis of electric power systems for 'more electric' aircraft. 3rd International Conference 'From Scientific Computing to Computational Engineering'. Athens, Greece, 9 July 2008 - 12 July 2008.
- Large signal stability analysis of DC power systems with constant power loads. IEEE Vehicle Power and Propulsion Conference, VPPC
- Stability assessment of AC hybrid power systems for 'more electric' aircraft. IEEE Vehicle Power and Propulsion Conference, VPPC
- Input admittance characteristics of permanent magnet brushless AC motor drive systems. Proceedings of the IEEE Vehicle Power and Propulsion Conference, VPPC '07 (pp 191-196)
- Advanced series and parallel converters for power system stability improvement. International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM (pp 803-808)
- Some considerations on power system stability improvement by FACTS devices. International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM (pp 809-813)
- Real-time modeling of electrical machines for hardware-in-the-loop tesing. UK Magnetic Society Meeting. Bristol, UK, April 2005.
- On power quality control strategy for distribution systems in deregulated environment. International Symposium on Power Electronics, Electrical Drives, Automation and Motion. Italy
- Electrothermal characterization of silicon-on-glass VDMOSFETs. Proceedings of the 24th International Conference on Microelectronics, Vol. 1 (pp 145-148)
- Thermal instability in two-finger bipolar transistors. 33rd Conference on European Solid-State Device Research (pp 203-206)
- Permanent magnet synchronous machines inter-turn short circuit fault detection by means of model based residual analysis. Proceedings of IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. Washington DC, USA, 21 October 2018 - 21 October 2018. View this article in WRRO
- State-space average modelling of 18-pulse diode rectifier. 3rd International Conference "From Scientific Computing to Computational Engineering". Athens, Greece, 9 July 2008 - 9 July 2008. View this article in WRRO
Preprints
- PWM-based speed and position estimations for permanent magnet synchronous machines. Applied Sciences, 15(18). View this article in WRRO
- Professional activities and memberships
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- Senior Lecturer, Advanced Control of Electrical Drives
- MSc Projects Coordinator