Professor Geraint Jewell
PhD, BEng
Department of Electronic and Electrical Engineering
Professor
Electrical Machines and Drives Research Group
Lecturer for Aerospace Engineering
g.jewell@sheffield.ac.uk
+44 114 222 5845
+44 114 222 5845
Full contact details
Professor Geraint Jewell
Department of Electronic and Electrical Engineering
Department of Electronic and Electrical Engineering
- Profile
-
I am a graduate of the Department (BEng 1988, PhD 1992) and have been a member of the academic staff since 1994. During my time on the academic staff I held an EPSRC Advanced Research Fellowship (2000-2005) and a Royal Society Industry Fellowship at Rolls-Royce (2006-2008).
I have been Director of the Rolls-Royce University Technology Centre in Advanced Electrical Machines since 2006 and Director of the EPSRC Future Electrical Machines Manufacturing Hub since 2019.
Alongside my mainstream academic roles within the Department, I served as the Faculty of Engineering’s first Faculty Director of Research and Innovation from 2008-2011 and as Head of the Department from 2013 to 2019.
My PhD research was concerned with the electromagnetic modelling and design of capacitor- discharge multipole magnetizing fixtures for NdFeB magnets, which at that time were a relatively recent development that posed many magnetization challenges.
I then applied the underpinning transient modelling to the problem of eddy currents in pulsed magnetometry for permanent magnet characterisation.
Since becoming a member of academic staff my interests have broadened to cover many aspects of electromechanical devices including electrical machines (permanent magnet, switched reluctance, synchronous reluctance) and linear actuators.
Much of this research has been directed towards aero-engine applications in collaboration with Rolls-Royce. This research has included high temperature devices (many around 400℃ but with one up to 800℃) and several demonstrator starter-generators for aero-engines.
I have also had a long-standing interest in core loss calculation methods for electrical machines. I have supervised ~20 PhD students to completion across a wide range of electromagnetic and electro-mechanical topics.
- Research interests
-
- Power dense electrical machines for aerospace applications
- Linear electromagnetic actuators
- Electromagnetic modelling of novel devices
My PhD research was concerned with the electromagnetic modelling and design of capacitor- discharge multipole magnetizing fixtures for NdFeB magnets, which at that time were a relatively recent development that posed many magnetization challenges.
I then applied the underpinning transient modelling to the problem of eddy currents in pulsed magnetometry for permanent magnet characterisation.
- Publications
-
Journal articles
- Geometrical control of eddy currents in additively manufactured Fe-Si. Materials & Design, 112002-112002.
- Cracking of soft magnetic FeSi to reduce eddy current losses in stator cores. Additive Manufacturing, 103555-103555.
- Influence of slot/pole number combinations and pole shaping on electromagnetic performance of permanent magnet machines with unbalanced north and south poles. IET Electric Power Applications.
- Novel Stator Slot Opening to Reduce Electrical Machine Bearing Currents. IEEE Transactions on Magnetics, 1-1.
- A manufacturing driven design methodology to lightweighting of the structural elements of a permanent magnet electrical machine rotor. IEEE Access, 1-1.
- Augmented classification for electrical coil winding defects. The International Journal of Advanced Manufacturing Technology. View this article in WRRO
- A Novel Asymmetric Interior Permanent Magnet Synchronous Machine. IEEE Transactions on Industry Applications, 1-1.
- Effect of Pole Shaping on Torque Characteristics of Consequent Pole PM Machines. IEEE Transactions on Industry Applications, 1-1.
- Suppression of Torque Ripple for Consequent Pole PM Machine by Asymmetric Pole Shaping Method. IEEE Transactions on Industry Applications, 1-1.
- Analytical Analysis of Cogging Torque in Permanent Magnet Machines With Unequal North and South Poles, with Particular Reference to Consequent Pole Machines. IEEE Transactions on Energy Conversion, 1-15.
- A Review of Modelling and Mitigation Techniques for Bearing Currents in Electrical Machines with Variable-frequency Drives. IEEE Access, 1-1.
- In-process monitoring in electrical machine manufacturing: A review of state of the art and future directions. Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture. View this article in WRRO
- A review on conductive common-mode EMI suppression methods in inverter fed motor drives. IEEE Access, 9, 18345-18360.
- A Novel Asymmetric Interior Permanent Magnet Machine for Electric Vehicles. IEEE Transactions on Energy Conversion.
- A Novel Spoke-type Asymmetric Rotor Interior Permanent Magnet Machine. IEEE Transactions on Industry Applications, 1-1.
- A Novel Asymmetric Rotor Interior Permanent Magnet Machine with Hybrid-layer Permanent Magnets. IEEE Transactions on Industry Applications, 1-1.
- Influence of Armature Reaction on Magnetic-field-shifting Effect in Asymmetric Interior Permanent Magnet Machines. IEEE Transactions on Energy Conversion, 1-1.
- Performance and operability of an electrically driven propulsor. International Journal of Engine Research.
- Impact of Current Harmonic Injection on Performance of Multi-Phase Synchronous Reluctance Machines. IEEE Transactions on Energy Conversion.
- Analytical modelling of dynamic performance with harmonic current injection for doubly salient SynRMs. IEEE Transactions on Industry Applications. View this article in WRRO
- Systematic design study into the influence of rotational speed on the torque density of surface-mounted permanent magnet machines. The Journal of Engineering, 2019(17), 4595-4600. View this article in WRRO
- Design, construction, and testing of an aero-engine starter-generator for the more-electric aircraft. The Journal of Engineering, 2019(17), 3474-3478. View this article in WRRO
- Investigation on Contribution of Inductance Harmonics to Torque Production in Multiphase Doubly Salient Synchronous Reluctance Machines. IEEE Transactions on Magnetics, 55(4). View this article in WRRO
- Comparative Studies of Torque Performance Improvement for Different Doubly Salient Synchronous Reluctance Machines by Current Harmonic Injection. IEEE Transactions on Energy Conversion. View this article in WRRO
- Quantitative Analysis of Contribution of Air-Gap Field Harmonics to Torque Production in Three-Phase 12-Slot/8-Pole Doubly Salient Synchronous Reluctance Machines. IEEE Transactions on Magnetics, 54(9). View this article in WRRO
- Recent development of reluctance machines with different winding configurations, excitation methods, and machine structures. China Electrotechnical Society Transactions on Electrical Machines and Systems, 2(1), 82-92. View this article in WRRO
- Novel Modular Switched Reluctance Machines for Performance Improvement. IEEE Transactions on Energy Conversion, 33(3), 1255-1265. View this article in WRRO
- Investigation on Synchronous Reluctance Machines with Different Rotor Topologies and Winding Configurations. IET Electric Power Applications. View this article in WRRO
- Influence of Conduction Angles on Single-Layer Switched Reluctance Machines. IEEE Transactions on Magnetics, 52(12). View this article in WRRO
- Comparative Study of Torque Production in Conventional and Mutually Coupled SRMs Using Frozen Permeability. IEEE Transactions on Magnetics, 52(6). View this article in WRRO
- Performance Comparison of Doubly Salient Reluctance Machine Topologies Supplied by Sinewave Currents. IEEE Transactions on Industrial Electronics, 63(7), 4086-4096. View this article in WRRO
- Torque analysis of conventional and mutually coupled switched reluctance machines using frozen permeability. IEEE Transactions on Magnetics. View this article in WRRO
- Performance investigation of hybrid excited switched flux permanent magnet machines using frozen permeability method. IET Electric Power Applications, 9(9), 586-594. View this article in WRRO
- Model Specific Characterization of Soft Magnetic Materials for Core Loss Prediction in Electrical Machines. IEEE Transactions on Magnetics, 50(11), 1-4.
- Comparison of flux switching and surface mounted permanent magnet generators for high-speed applications. IET Electrical Systems in Transportation, 1(3), 111-116.
- Hybrid-excited flux-switching permanent-magnet machines with iron flux bridges. IEEE Transactions on Magnetics, 46(6), 1726-1729.
- Optimal split ratio in fractional-slot interior permanent-magnet machines with non-overlapping windings. IEEE Transactions on Magnetics, 46(5), 1235-1242.
- Alternate poles wound flux-switching permanent-magnet brushless AC machines. IEEE Transactions on Industry Applications, 46(2), 790-797.
- Analytical modeling and finite-element computation of radial vibration force in fractional-slot permanent-magnet brushless machines. IEEE Transactions on Industry Applications, 46(5), 1908-1918.
- Enhanced optimal torque control of fault-tolerant PM machine under flux-weakening operation. IEEE Transactions on Industrial Electronics, 57(1), 344-353.
- Multiphase flux-switching permanent-magnet brushless machine for aerospace application. IEEE Transactions on Industry Applications, 45(6), 1971-1981.
- Cogging torque in flux-switching permanent magnet machines. IEEE Transactions on Magnetics, 45(10), 4708-4711.
- Proximity loss study in high speed flux-switching permanent magnet machine. IEEE Transactions on Magnetics, 45(10), 4748-4751.
- Variable-airgap, cylindrical, linear variable reluctance actuators for high-force, medium-stroke applications. IET Electric Power Applications, 3(4), 352-362.
- An online winding fault detection technique for fault-tolerant PM machines. International Journal of Systems Science, 40(3), 289-296.
- Analytical prediction of the short-circuit current in fault-tolerant permanent-magnet machines. IEEE Transactions on Industrial Electronics, 55(12), 4210-4217.
- Testing of a 250-kilowatt fault-tolerant permanent magnet power generation system for aeroengines. Journal of Propulsion and Power, 24(2), 330-335.
- Flux-switching PM brushless machines with alternative stator and rotor pole combinations. Journal of Asian Electric Vehicles, 6(1), 1103-1110.
- High temperature permanent magnet actuator for fail-safe applications. IEEJ Transactions on Industry Applications, 128(10).
- Effect of axial segmentation of permanent magnets on rotor loss in modular permanent-magnet brushless machines. IEEE Transactions on Industry Applications, 43(5), 1207-1213.
- Static performance of a polarized permanent-magnet reluctance actuator for internal combustion engine valve actuation. IEEE Transactions on Magnetics, 42(8), 2063-2070.
- Full-field pulsed magnetophotoelasticity - experimental implementation. Journal of Strain Analysis for Engineering Design, 41(2), 171-182. View this article in WRRO
- Full-field pulsed magnetophotoelasticity - a description of the instrument. Journal of Strain Analysis for Engineering Design, 41(2), 161-170. View this article in WRRO
- Prediction and measurement of core losses in a high-speed switched-reluctance machine. IEEE Transactions on Magnetics, 41(11), 4288-4298.
- Design of a miniature permanent-magnet generator and energy storage system. IEEE Transactions on Industrial Electronics, 52(5), 1383-1390. View this article in WRRO
- Enhancing the force capability of permanent magnet latching actuators for electromechanical valve actuation systems. Journal of Applied Physics, 97(10).
- Design features for enhancing the performance of electromagnetic valve actuation systems. IEEE Transactions on Magnetics, 41(3), 1163-1168.
- An integrated starter-generator for a large civil aero-engine. Collection of Technical Papers - 3rd International Energy Conversion Engineering Conference, 1, 384-391.
- Iron loss in a modular rotor switched reluctance machine for the 'more-electric' aero-engine. INTERMAG ASIA 2005: Digests of the IEEE International Magnetics Conference, 42.
- An evaluation of alternative stator lamination materials for a high-speed, 1.5 MW, permanent magnet generator. IEEE Transactions on Magnetics, 40(4 II), 2041-2043.
- Analysis and design optimization of an improved axially magnetized tubular permanent-magnet machine. IEEE Transactions on Energy Conversion, 19(2), 289-295. View this article in WRRO
- Electromagnetic design optimization of a powder aligning fixture for a compression-molded anisotropie NdFeB ring magnet. IEEE Transactions on Magnetics, 40(3), 1702-1707.
- A spherical permanent magnet actuator for a high-fidelity force-feedback joystick. Mechatronics, 14(3), 327-339.
- Design and control of a novel spherical permanent magnet actuator with three degrees of freedom. IEEE/ASME Transactions on Mechatronics, 8(4), 457-468.
- Fringing in tubular permanent-magnet machines: Part I. Magnetic field distribution, flux linkage, and thrust force. IEEE Transactions on Magnetics, 39(6), 3507-3516.
- Fringing in tubular permanent-magnet machines: Part II. Cogging force and its minimization. IEEE Transactions on Magnetics, 39(6), 3517-3522. View this article in WRRO
- Comparison of Halbach magnetized brushless motors equipped with air-cored and iron-cored rotors. Journal of Applied Physics, 93(10), 8692-8694.
- Dynamic modeling of tubular moving-magnet linear actuators. Journal of Applied Physics, 93(10), 8787-8789.
- Rotor topologies for a switched-reluctance machine for the 'more-electric' aircraft engine. IEE Proceedings: Electric Power Applications, 150(3), 311-318.
- Calculation of centrifugal stress in four-pole switched-reluctance rotors. IEE Proceedings: Electric Power Applications, 150(1), 97-105.
- Influence of an aperture on the performance of a two-degree-of-freedom iron-coded spherical permanent-magnet actuator. IEEE Transactions on Magnetics, 38(6), 3650-3653.
- Transient performance of a short-stroke linear solenoid actuator. IEE Proceedings - Electric Power Applications, 149(5), 379-384.
- Tailoring force-displacement characteristics in medium-stroke linear variable reluctance actuators. IEEE Transactions on Magnetics, 38(5), 3267-3269.
- A low-power, linear, permanent-magnet generator/energy storage system. IEEE Transactions on Industrial Electronics, 49(3), 640-648. View this article in WRRO
- Design of powder aligning systems for the compression molding of radially anisotropic permanent magnet rings. Journal of Applied Physics, 91(10), 8837-8839.
- Design optimisation and comparison of tubular permanent magnet machine topologies. IEE Proceedings: Electric Power Applications, 148(5), 456-464.
- Aerodynamic losses in switched reluctance machines. IEE Proceedings: Electric Power Applications, 147(6), 443-448.
- Design of impulse magnetizing fixtures for the radial homopolar magnetization of isotropic NdFeB ring magnets. IEEE Transactions on Magnetics, 36(5), 3846-3857.
- Analysis of anisotropic bonded NdFeB Halbach cylinders accounting for partial powder alignment. IEEE Transactions on Magnetics, 36(5), 3575-3577. View this article in WRRO
- Powder alignment system for anisotropic bonded NdFeB Halbach cylinders. IEEE Transactions on Magnetics, 36(5), 3349-3352. View this article in WRRO
- Short-stroke, bidirectional linear actuator for high temperature applications. IEE Proceedings: Electric Power Applications, 147(3), 175-180.
- A general framework for the analysis and design of tubular linear permanent magnet machines. IEEE Transactions on Magnetics, 35(3), 1986-2000. View this article in WRRO
- The design and construction of a high temperature linear electromagnetic actuator. Journal of Applied Physics, 85(8), 4901-4903.
- Design of a high speed switched reluctance machine for automotive turbo-generator applications. SAE Technical Papers.
- Case studies on electromagnetic finite element coupled problems. IEE Colloquium (Digest)(14), 29-31.
- Design and experimental characterisation of a linear reciprocating generator. IEE Proceedings: Electric Power Applications, 145(6), 509-518.
- The design and analysis of axial field multipole impulse magnetizing fixtures. Journal of Applied Physics, 83(11), 7112-7114.
- A novel spherical permanent magnet actuator with three degrees-of-freedom. IEEE Transactions on Magnetics, 34(4(1)), 2075-2077.
- Analysis, design and control of a novel spherical permanent-magnet actuator. IEE Proceedings: Electric Power Applications, 145(1), 61-71.
- A novel spherical actuator: Design and control. IEEE Transactions on Magnetics, 33(5(2)), 4209-4211. View this article in WRRO
- Analysis of a spherical permanent magnet actuator. Journal of Applied Physics, 81(8(2a)), 4266-4268.
- The design of radial-field multipole impulse magnetizing fixtures for isotropie ndfeb magnets. IEEE Transactions on Magnetics, 33(1(2)), 708-722.
- Finite element modeling of powder aligning and multipole magnetizing systems for anisotropic bonded permanent magnets. Journal of Applied Physics, 79(8(2b)), 6342-6344.
- Design considerations for permanent magnet polarized electromagnetically actuated brakes. IEEE Transactions on Magnetics, 31(6(2)), 3743-3745.
- An accurate pulsed field hystersograph. Physica B: Physics of Condensed Matter, 211(1-4), 348-350.
- Pulsed-field magnetometry. IEEE Transactions on Magnetics, 29(6), 2980-2982.
- Computer-aided-design of magnetizing fixtures for the post-assembly magnetization of rare-earth permanent-magnet brushless DC motors. IEEE Transactions on Magnetics, 28(5), 3036-3038.
- A method for assessing eddy-current effects in pulsed magnetometry. IEEE Transactions on Magnetics, 28(5), 3114-3116.
- Design, analysis, and simulation of impulse magnetization systems based on solenoid magnetizing fixtures. COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 11(1), 225-228.
- A CAD package for solenoid impulse magnetizing fixtures. IEEE Transactions on Magnetics, 28(2), 255-257.
- Simulation of Capacitor Discharge Magnetisation. IEEE Transactions on Magnetics, 26(5), 1638-1640.
- A probe to measure rheological variations in slurry. Biological Wastes, 24, 47-56.
- Combined Electromagnetic and Mechanical Design Optimization of Interior Permanent Magnet Rotors for Electric Vehicle Drivetrains. World Electric Vehicle Journal, 15(1), 4-4.
- A model to account for magnetic permeability changes resulting from edge damage caused by laser cutting in a high performance cobalt-iron alloy. Journal of Magnetism and Magnetic Materials.
- Experimental ball bearing impedance analysis under different speed and electrical conditions. IEEE Transactions on Dielectrics and Electrical Insulation.
- Inspection of Enamel Removal Using Infrared Thermal Imaging and Machine Learning Techniques. Sensors, 23(8), 3977-3977.
- Influence of Armature Reaction on Electromagnetic Performance and Pole Shaping Effect in Consequent Pole Pm Machines. Energies, 16(4), 1982-1982.
- A Review of Circular Economy Research for Electric Motors and the Role of Industry 4.0 Technologies. Sustainability, 13(17), 9668-9668.
Chapters
- Contributor contact details, Functional Materials for Sustainable Energy Applications (pp. xiii-xvii). Elsevier
- Rare-earth magnets: Properties, processing and applications, Functional Materials for Sustainable Energy Applications (pp. 600-639).
Conference proceedings papers
- Manufacturing processes for 2.5D laminated stacks. 2023 13th International Electric Drives Production Conference (EDPC), 29 November 2023 - 30 November 2023.
- Flexible Manufacturing of High-value Low-volume Electrical Machines through Robotic Coil Winding. 2023 13th International Electric Drives Production Conference (EDPC), 29 November 2023 - 30 November 2023.
- Fibre Bragg Grating Sensor Based Winding Strain Monitoring and Insulation Lifetime Prediction. 2023 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific), 28 November 2023 - 1 December 2023.
- An Investigation of Substituting Copper with Aluminum Conductors in a High Power, Medium Speed SPM Machine. 2023 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific), 28 November 2023 - 1 December 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), 5 November 2023 - 8 November 2023.
- A New Analytical Model for Voltage Stress Analysis at Neutral Point of Stator Windings. 2023 26th International Conference on Electrical Machines and Systems (ICEMS), 5 November 2023 - 8 November 2023.
- Thermal Degradation Profile of Concentrated Stator Winding Insulation by Impedance Spectroscopy. 2023 IEEE 14th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED), 28 August 2023 - 31 August 2023.
- Novel Stator Slot Opening to Reduce Electrical Machine Bearing Currents. 2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers), 15 May 2023 - 19 May 2023.
- Line-connected permanent magnet generator with adjustable excitation for variable-frequency AC aircraft power systems. 2023 IEEE International Electric Machines & Drives Conference (IEMDC), 15 May 2023 - 18 May 2023.
- Developing requirements for future electrical machine manufacture to achieve a net zero future. Renewable Power Generation and Future Power Systems Conference 2023 (RPG 2023 UK)
- Ex-situ Inspection of Concentrated Stator Coils by Means of Impedance Spectroscopy. 2022 International Conference on Electrical Machines (ICEM), 5 September 2022 - 8 September 2022.
- Survey of Insulation in Electrical Machines for Aerospace: Systems, Materials & Inspection. 2022 International Conference on Electrical Machines (ICEM), 5 September 2022 - 8 September 2022.
- Sensorformer: A Memory-efficient Transformer for Industrial Sensor Fusion. 2022 27th International Conference on Automation and Computing (ICAC), 1 September 2022 - 3 September 2022.
- Impact of compressive mechanical stress from shrink fitting of a casing on the core loss in a Cobalt Iron stator core of a permanent magnet synchronous machine. 11th International Conference on Power Electronics, Machines and Drives (PEMD 2022)
- Effects of the randomness of winding distribution in slot on the bearing voltage and the electric discharge machining bearing current. 11th International Conference on Power Electronics, Machines and Drives (PEMD 2022)
- An investigation into the influence of stator tooth and conductor geometry on AC winding losses in a 365kW permanent magnet machine equipped with rectangular bar conductors. 11th International Conference on Power Electronics, Machines and Drives (PEMD 2022)
- Remote laser cutting of high cobalt content electrical steel: preliminary results and microscopy. 11th International Conference on Power Electronics, Machines and Drives (PEMD 2022)
- Suppression of Torque Ripple for Consequent Pole PM Machine by Asymmetric Pole Shaping Method. 2021 IEEE International Electric Machines & Drives Conference (IEMDC), 17 May 2021 - 20 May 2021.
- Effect of Pole Shaping on Torque Characteristics of Consequent Pole PM Machines. 2021 IEEE International Electric Machines & Drives Conference (IEMDC), 17 May 2021 - 20 May 2021.
- Dynamic Performance Investigation of Doubly Salient Synchronous Reluctance Machines with Current Harmonic Injection. 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 11 August 2019 - 14 August 2019.
- Losses in Different Doubly Salient Synchronous Reluctance Machines with Current Harmonic Injection. 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 11 August 2019 - 14 August 2019.
- Comparison of Magnetically Geared and Surface-mounted PM machines - Influence of Machine Size and Current Density. 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 11 August 2019 - 14 August 2019.
- Torque Performance Improvement of Doubly Salient Synchronous Reluctance Machines by Current Harmonic Injection. 2019 IEEE International Electric Machines & Drives Conference (IEMDC), 12 May 2019 - 15 May 2019.
- Losses in Different Doubly Salient Synchronous Reluctance Machines with Current Harmonic Injection. 2019 22ND INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS 2019) (pp 4860-4865)
- Dynamic Performance Investigation of Doubly Salient Synchronous Reluctance Machines with Current Harmonic Injection. 2019 22ND INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS 2019) (pp 4178-4183)
- Comparison of Magnetically Geared and Surface mounted PM machines - Influence of Machine Size and Current Density. 2019 22ND INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS 2019) (pp 4769-4774)
- Modelling of dynamic machine behavior in peripheral milling operations. 2017 IEEE International Electric Machines and Drives Conference (IEMDC), 21 May 2017 - 24 May 2017.
- Cogging torque reduction in hybrid-excited axial field flux-switching fault-tolerant machines. 2017 IEEE International Electric Machines and Drives Conference (IEMDC), 21 May 2017 - 24 May 2017.
- Comparative study of short-pitched and fully-pitched SRMs supplied by sine wave currents. 2015 IEEE International Conference on Industrial Technology (ICIT), 17 March 2015 - 19 March 2015.
- Effects of load conditions on rotor eddy current loss in modular permanent magnet machines. IEEE International Electric Machines and Drives Conference, IEMDC 2011 (pp 1328-1333)
- Comparison of radial vibration forces in 10-pole/12-slot fractional-slot surface-mounted and interior PM brushless AC machines. 19th International Conference on Electrical Machines, ICEM 2010
- Comparison of flux switching and surface mounted permanent magnet generators for aerospace applications. IET Conference Publications, Vol. 2010(563 CP)
- Analytical modelling and finite element computation of radial vibration force in fractional-slot permanent magnet brushless machines. Proceedings of the IEEE International Electric Machines and Drives Conference (pp 144-151). Miami, USA
- Development of a versatile pulsed magneto-polariscope. Society for Experimental Mechanics - SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2009, Vol. 3 (pp 1767-1775)
- Influence of slot and pole number combination on radial force and vibration modes in fractional slot PM brushless machines having single- and double-layer windings. IEEE Energy Conversion Congress and Exposition, ECCE 2009 (pp 3443-3450)
- Optimal split ratio in fractional-slot interior permanent magnet machines with non-overlapping windings. IEEE International Electric Machines and Drives Conference, IEMDC '09 (pp 1721-1728)
- Analytical modelling and finite element computation of radial vibration force in fractional-slot permanent magnet brushless machines. 2009 IEEE International Electric Machines and Drives Conference, IEMDC '09, Vol. 1-3 (pp 144-151)
- Hybrid excited flux-switching permanent magnet machines. 13th European Conference on Power Electronics and Applications, EPE '09, Vol. 1-9 (pp 1526-1535)
- Mult-phase flux-switching permanent magnet brushless machine for aerospace application. IEEE Industry Applications Society Annual Meeting (pp 1949-1956). Alberta, Canada
- Advances in the characterization of the residual stress distribution in thermally toughened glass - using pulsed magneto-photoelasticity. Society for Experimental Mechanics - 11th International Congress and Exhibition on Experimental and Applied Mechanics, Vol. 4 (pp 1837-1845)
- Enhanced optimal torque control of fault-tolerant PM machine under flux weakening operation. Proceedings of the 2008 International Conference on Electrical Machines, ICEM'08, Vol. 1-4 (pp 1608-1613)
- Analysis of switching loss of an AC fed direct converter for a switched reluctance machine. Proceedings of the 2008 International Conference on Electrical Machines, ICEM'08, Vol. 1-4 (pp 1931-1936)
- Flux-switching PM brushless machines with alternative stator and rotor pole combinations. Proceedings of the 11th International Conference on Electrical Machines and Systems, ICEMS 2008 (pp 2986-2991)
- Fault-tolerant flux-switching permanent magnet brushless AC machines. Conference Record - IAS Annual Meeting (IEEE Industry Applications Society), Vol. 1-5 (pp 1965-1972)
- Multi-phase flux-switching permanent magnet brushless machine for aerospace application. Conference Record - IAS Annual Meeting (IEEE Industry Applications Society), Vol. 1-5 (pp 1949-1956)
- The development and application of magnetophotoelasticity. Proceedings of 13th International Conference on Experimental Mechanics. The Netherlands, 1 July 2007 - 6 July 2007.
- High temperature permanent magnet actuator for fail-safe applications. Proceedings of the 6th International Symposium on Linear Drives for Industry Applications. Lille, France
- Improvements in the application of pulsed magnetophotoelasticity. Proceedings of the SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2007, Vol. 3 (pp 2006-2013)
- Experimental testing of a 250 kW fault-tolerant permanent magnet power generation system for large civil aero-engines. Collection of Technical Papers - 5th International Energy Conversion Engineering Conference, Vol. 2 (pp 1076-1083)
- Thermal modeling of flooded rotor electrical machines for electro-hydrostatic actuators. Proceedings of IEEE International Electric Machines and Drives Conference, IEMDC 2007, Vol. 2 (pp 1632-1637)
- Analysis of an AC fed direct converter for a switched reluctance machine in aerospace applications. Conference Proceedings - IPEMC 2006: CES/IEEE 5th International Power Electronics and Motion Control Conference, Vol. 2 (pp 977-982)
- Analysis of an AC fed direct converter for a switched reluctance machine in aerospace applications. 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference, 14 August 2006 - 16 August 2006.
- Current ripple minimisation in switched reluctance (SR) machines for aerospace applications. INTERMAG 2006 - IEEE International Magnetics Conference (pp 768)
- Iron loss in a modular rotor switched reluctance machine for the "more-electric" aero-engine. IEEE Transactions on Magnetics, Vol. 41(10) (pp 3934-3936)
- Design and analysis of permanent magnet latching actuators for electromechanical valve actuation systems for a wide operating temperature range. Proceedings of the 5th International Symposium on Linear Drives for Industry Applications (pp 544-547). Kobe-Awaji, Japan
- Resistance estimation for temperature determination in PMSMs through signal injection. 2005 IEEE International Conference on Electric Machines and Drives (pp 735-740)
- Design of a 250kW, fault-tolerant PM generator for the more-electric aircraft. Collection of Technical Papers - 3rd International Energy Conversion Engineering Conference, Vol. 2 (pp 1173-1182)
- High performance electrical machines. Proceedings of the 18th International Workshop on High Performance Magnets and their Applications (pp 341-351). Annecy, France
- Pulsed magnetophotoelasticity - a novel instrument. Proceedings of the SEM Annual Conference on Experimental and Applied Mechanics. Costa Mesa, USA, 5 June 2004 - 7 June 2004.
- The development of a pulsed full-field magnetopolariscope. CD ROM Proceedings of the 12th International Conference on Experimental Mechanics. Politecnico di Bari, Italy, 29 August 2004 - 2 September 2004.
- Effect of axial segmentation of permanent magnets on rotor loss of modular brushless machines. Conference Record - IAS Annual Meeting (IEEE Industry Applications Society), Vol. 3 (pp 1703-1708)
- Tailoring force-stroke characteristics in medium-stroke linear reluctance actuators. Digests of the Intermag Conference
- An investigation into the corrosion behaviour of Zn coated NdFeB powder. INTERMAG Europe 2002 - IEEE International Magnetics Conference
- Comparison and repeatability characteristics of genetically tuned current and position controllers on a permanent magnet linear actuator. The 4th International Symposium on Linear Drives for Industry Applications (pp 363-366). Birmingham, UK
- Linear reluctance actuator for variable-geometry turbocharger. Proceedings of the 4th International Symposium on Linear Drives for Industry Applications (pp 564-568). Birmingham, UK
- Analytical prediction and minimisation of cogging force in tubular permanent magnet machines. International Conference on Electrical Machines. Bruges, Belgium
- An investigation into the corrosion behaviour of Zn coated NdFeB powder. Digests of the Intermag Conference
- Analysis of rare-earth magnet devices. Rare Earth Magnets and their Applications (pp 86-99)
- An improved axially magnetised tubular permanent magnet machine topology. International Conference on Power Electronics, Machines and Drives(487) (pp 303-308)
- Controllability analysis of multi objective control systems.. IEEE International Symposium on Computer Aided Control System Design Proceedings (pp 74-79)
- Analysis and design optimisation of slotless tubular permanent magnet linear motors. Proceedings of the 3rd Linear Drives for Industry Applications Conference. Nagano, Japan
- Design and dynamic analysis of linear moving magnet actuators. Proceedings of the 3rd Linear Drives for Industry Applications Conference (pp 375-380). Nagano, Japan
- Multi-degree-of-freedom spherical permanent magnet motors. ICRA (pp 1798-1805)
- The influence of magnetization pattern on the performance of a cylindrical moving-magnet linear actuator. IEEE Transactions on Magnetics, Vol. 36(5) (pp 3571-3574)
- Finite element analysis of short-stroke linear motors and actuators. IEE Colloquium (Digest)(13) (pp 41-46)
- Design and analysis of a reciprocating moving magnet actuator employing bonded NdFeB magnets. Proceedings of the 16th International Workshop on Rare-Earth Magnets and their Applications (pp 1021-1030). Sendai, Japan
- Finite element analysis in the design of permanent magnet machines. IEE Colloquium (Digest)(13) (pp 1-7)
- Design of powder alignment system for anisotropic bonded NdFeB Halbach cylinders. Digests of the Intermag Conference
- Analysis of anisotropic bonded NdFeB halbach cylinders accounting for partial powder alignment. Digests of the Intermag Conference
- Novel permanent magnet machines using Halbach cylinders. Proceedings of the 3rd International Power Electronics and Motion Control Conference, IPEMC 2000, Vol. 1-3 (pp 903-908)
- Influence of magnetisation pattern on the performance of a cylindrical, moving magnet linear actuator. Digests of the Intermag Conference
- Design optimization of a miniature multi-pole permanent magnet generator. IEE Conference Publication(468) (pp 128-132)
- Design optimisation of a miniature multipole permanent magnet generator. Proceedings of the 9th International Conference on Electrical Machines and Drives (pp 128-132). Canterbury Christ Church College, UK
- A high efficiency, low cost, permanent magnet generator for an electric auxiliary power unit. Proceedings of the 32nd International Symposium on Automotive Technology and Automation (pp 503-509). Vienna, Austria, 14 June 1999 - 18 June 1999.
- Design of a high speed switched reluctance machine for automotive turbo-generator applications. Proceedings of the Society of Automotive Engineers Conference on Future Transportation Technology. Costa Mesa, USA, 19 August 1999 - 21 August 1999.
- Integrated design of magnet powder aligning system and brushless motor using anisotropic Halbach cylinders. 9th International Conference on Electrical Machines and Drives(468) (pp 123-127)
- A novel spherical permanent magnet actuator with three degrees-of-freedom. IEEE Transactions on Magnetics, Vol. 34(4) (pp 2078-2080) View this article in WRRO
- Miniature linear permanent magnet generators. Proceedings of the 15th International Workshop on Rare-Earth Magnets and their Applications. Dresden, Germany
- Analysis and design of a linear reciprocating generator for telemetry based vibration monitoring systems. Proceedings of the International Conference on Electrical Machines (pp 857-862). Istanbul, Turkey
- Experimental validation of a finite element based dynamic simulation technique for fast-acting, short-stroke, linear actuators. Proceedings of the 2nd Linear Drives for Industry Applications Conference. Tokyo, Japan
- A linear reciprocating generator for telemetry based monitoring systems. Proceedings of the 2nd Linear Drives for Industry Applications Conference. Tokyo, Japan
- Spherical actuators with multiple degrees-of-freedom. IEE Colloquium (Digest)(494)
- Modelling of a novel spherical permanent magnet actuator. Proceedings - IEEE International Conference on Robotics and Automation, Vol. 2 (pp 1190-1195)
- Development of a novel spherical permanent magnet actuator. IEE Colloquium (Digest)(90)
- The integrated design of powder aligning and impulse magnetizing systems. Rare-Earth Magnets and their Applications - Proceedings of the 14th International Workshop, Vol. 1-2 (pp A67-A86)
- The design of multipole magnetizing fixtures for axial field permanent magnet machines equipped with isotropic NdFeB magnet rings. Proceedings of the 2nd Chinese International Conference on Electrical Machines. Hangzhou, China
- Effect of multipole magnetization of a permanent magnet ring on the cogging torques and back EMF waveforms of a BLDCM. Proceedings of the 2nd Chinese International Conference on Electrical Machines. Hangzhou, China
- Multipole impulse magnetization strategies for an external rotor brushless DC motor equipped with a sintered NdFeB magnet. Proceedings of the 13th International Workshop on Rare-Earth Magnets and their Application. Birmingham, UK, 11 September 1994 - 14 September 1994.
- Micro-generator for Smart Diskette. Proceedings of the 12th International Workshop on Rare-Earth Magnets and their Application (pp 121-132). Canberra, Australia, 12 July 1992 - 15 July 1992.
- Design, analysis and simulation of multipole impulse magnetizing fixtures for rare-earth magnets. Proceedings of the 27th Universities' Power Engineering Conference
- Design, analysis and simulation of impulse magnetization systems based on solenoid magnetizing fixtures. Proceedings of the International Symposium on Electrical Fields (pp 339-342). Southampton, UK
- Post-assembly impulse magnetization of brushless DC motors equipped with rare-earth magnets. IEE Conference Publication(341) (pp 16-20)
- Capacitor discharge magnetization of fine pole pitch rare-earth magnets. Proceedings of the 25th Universities' Power Engineering Conference (pp 581-584)
- Tailoring force-stroke characteristics in medium-stroke linear reluctance actuators. IEEE International Digest of Technical Papers on Magnetics Conference
- The Design and analysis of axial field multipole impulse magnetizing fixtures. 7th Joint MMM-Intermag Conference. Abstracts (Cat. No.98CH36275)
- Analysis of a Novel Spherical Permanent Magnet Actuator with Three Degrees-of-Freedom. 7th Joint MMM-Intermag Conference. Abstracts (Cat. No.98CH36275)
- A Novel Spherical Actuator Design And Control. 1997 IEEE International Magnetics Conference (INTERMAG'97)
- A method for assessing eddy current effects in pulsed magnetometry. 1992. Digests of Intermag. International Magnetics Conference
- The computer-aided design of magnetizing fixtures for the post-assembly magnetization of rare-earth permanent brushless DC motors. 1992. Digests of Intermag. International Magnetics Conference
Preprints
- Geometrical control of eddy currents in additively manufactured Fe-Si. Materials & Design, 112002-112002.
- Professional activities and memberships
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- Rolls-Royce University Technology Centre in Advanced Electrical Machines
- Research students
I have supervised ~20 PhD students to completion across a wide range of electromagnetic and electro-mechanical topics.
Student
Degree Status Primary/Secondary Balachandran B PhD Graduated Primary Duke A PhD Graduated Primary Forrest S J PhD Graduated Primary Menon K G PhD Graduated Primary Nie C PhD Graduated Primary Pan Q PhD Graduated Primary Rodrigues L K PhD Graduated Primary Shortte M O P PhD Graduated Primary Alwash M A M PhD Graduated Secondary Azar Z PhD Graduated Secondary Chu W PhD Graduated Secondary Conway A R PhD Graduated Secondary Gladwin D T PhD Graduated Secondary Guan Y PhD Graduated Secondary Lee B PhD Graduated Secondary Ma Xiyun PhD Graduated Secondary Owen R L PhD Graduated Secondary Ren Y PhD Graduated Secondary Rogers D J PhD Graduated Secondary Suppharangsan W PhD Graduated Secondary Thomas A S PhD Graduated Secondary Wu Z PhD Graduated Secondary Xue S PhD Graduated Secondary Zheng M PhD Graduated Secondary