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Dr PETER CONNOR's Outputs (27)

A Holistic Analysis and Experimental Testing of a Passive Heat Path for Electric Motors Slots (2025)
Journal Article
Hebala, A., Connor, P. H., Nuzzo, S., Gerada, C., & Galea, M. (2025). A Holistic Analysis and Experimental Testing of a Passive Heat Path for Electric Motors Slots. IEEE Transactions on Transportation Electrification, https://doi.org/10.1109/tte.2025.3537161

This paper presents a thorough and broad analysis of the passive slot heat path concept. Six heat path shapes are proposed and compared in terms of their combined thermal and electrical performance. Through an extensive search pool that covers a wide... Read More about A Holistic Analysis and Experimental Testing of a Passive Heat Path for Electric Motors Slots.

Passive In-Slot Heat Path Realisation for Extending the Operating Limits of an Aircraft Propulsion Motor (2024)
Journal Article
Hebala, A., Nuzzo, S., H. Connor, P., Gerada, C., & Galea, M. (2024). Passive In-Slot Heat Path Realisation for Extending the Operating Limits of an Aircraft Propulsion Motor. IEEE Transactions on Transportation Electrification, https://doi.org/10.1109/TTE.2024.3520380

This paper studies the combined thermal and electrical characteristics of different in-slot conductive heat path materials and shapes to reduce the winding hotspot temperature and improve electrical motors’ output power and performance. Combinations... Read More about Passive In-Slot Heat Path Realisation for Extending the Operating Limits of an Aircraft Propulsion Motor.

High Pole Number Outer-Rotor SPM Machine for Sustainable 150kW High-Speed EV Traction (2024)
Presentation / Conference Contribution
Walker, A., Zou, T., Mifsud, L. P., Connor, P., Huang, H., Ren, X., Batho, G., Tweedy, O., Gerada, C., & Kaloun, A. (2024, October). High Pole Number Outer-Rotor SPM Machine for Sustainable 150kW High-Speed EV Traction. Presented at 2024 IEEE Vehicle Power and Propulsion Conference, VPPC 2024, Washington, DC, USA

The ambitious roadmaps of electric vehicle (EV) powertrains are pushing traction motors to achieve step-change performance improvements in power density, efficiency, and cost by 2035. Limited by technology bricks such as materials, manufacturing and... Read More about High Pole Number Outer-Rotor SPM Machine for Sustainable 150kW High-Speed EV Traction.

All-Inorganic Electrical Insulation Systems for High-Power Density Electrical Machines (2024)
Presentation / Conference Contribution
Kudrynskyi, Z., Connor, P. H., Cooper, T. P., Wadge, M. D., Kerfoot, J., Zheng, X., Felfel, R., Korolkov, V., Kubal, M., Gerada, C., & Grant, D. M. (2024, June). All-Inorganic Electrical Insulation Systems for High-Power Density Electrical Machines. Presented at 2024 IEEE 5th International Conference on Dielectrics (ICD), Toulouse, France

This paper introduces the concept of ‘All-Inorganic Electrical Insulation (EI) System’ to enable the next generation of high-power-density electrical machines (EMs) that can operate at extreme conditions, namely high voltages (V) up to 1 kV DC and hi... Read More about All-Inorganic Electrical Insulation Systems for High-Power Density Electrical Machines.

All-Inorganic Electrical Insulation Systems for High-Power Density Electrical Machines (2024)
Presentation / Conference Contribution
Kudrynskyi, Z. R., Connor, P. H., Cooper, T. P., Wadge, M. D., Kerfoot, J., Zheng, X., Felfel, R. M., Korolkov, V. V., Kubal, M., Gerada, C., & Grant, D. M. (2024, June). All-Inorganic Electrical Insulation Systems for High-Power Density Electrical Machines. Presented at 2024 IEEE 5th International Conference on Dielectrics (ICD), Toulouse, France

This paper introduces the concept of ‘All-Inorganic Electrical Insulation (EI) System’ to enable the next generation of high-power-density electrical machines (EMs) that can operate at extreme conditions, namely high voltages (V) up to 1 kV DC and hi... Read More about All-Inorganic Electrical Insulation Systems for High-Power Density Electrical Machines.

Cooling System Sizing using LPTN Analysis and Multiphysics Modelling for an Axial Flux Machine and Integrated Drive (2022)
Presentation / Conference Contribution
Jeffrey, A. J., Connor, P. H., Vakil, G., Evans, P., Wheeler, P., & Hart, S. (2022, September). Cooling System Sizing using LPTN Analysis and Multiphysics Modelling for an Axial Flux Machine and Integrated Drive. Presented at 2022 International Conference on Electrical Machines (ICEM), Valencia, Spain

In this paper a Lumped Parameter Thermal Network (LPTN) is proposed for a Yokeless and Segmented Armature (YASA) axial flux permanent magnet (AFPM) machine. A simulation model is used to examine the machine in isolation, with an Integrated Motor Driv... Read More about Cooling System Sizing using LPTN Analysis and Multiphysics Modelling for an Axial Flux Machine and Integrated Drive.

On the Fault Tolerance and PM Demagnetisation of a High-Performance Aircraft Propulsion Motor (2022)
Presentation / Conference Contribution
Hebala, A., Nuzzo, S., Connor, P. H., Gerada, C., & Galea, M. (2022, September). On the Fault Tolerance and PM Demagnetisation of a High-Performance Aircraft Propulsion Motor. Presented at 2022 International Conference on Electrical Machines (ICEM), Valencia, Spain

In this paper, a study of the fault-tolerance and demagnetisation of a high-performance aircraft propulsion motor is investigated. The motor is proposed with either three or four sets of three-phase windings, while maintaining the same magnetic and t... Read More about On the Fault Tolerance and PM Demagnetisation of a High-Performance Aircraft Propulsion Motor.

Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark (2022)
Presentation / Conference Contribution
Connor, P. H., Khowja, M., La Rocca, A., La Rocca, S., Zou, T., Vakil, G., Walker, A., Gerada, C., & Paciura, K. (2022, September). Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark. Presented at 2022 International Conference on Electrical Machines (ICEM), Valencia, Spain

This paper investigates the potential benefits for the use of synchronous reluctance machines for traction applications. Permanent magnet machines are often used to generate the highest power densities. However, magnet use has drawbacks including tem... Read More about Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark.

Analysis and Mitigation of AC Losses in High Performance Propulsion Motors (2022)
Journal Article
Hebala, A., Nuzzo, S., Connor, P. H., Volpe, G., Gerada, C., & Galea, M. (2022). Analysis and Mitigation of AC Losses in High Performance Propulsion Motors. Machines, 10(9), Article 780. https://doi.org/10.3390/machines10090780

In this paper, the AC copper losses in classical random windings are investigated and mitigated using several techniques across a range of permanent magnet synchronous motor designs. At high operating frequencies, AC copper losses can represent a sub... Read More about Analysis and Mitigation of AC Losses in High Performance Propulsion Motors.

Practical Implementation and Associated Challenges of Integrated Torque Limiter (2022)
Presentation / Conference Contribution
Ilkhani, M. R., Syed, S. A., Connor, P. H., Vakil, G., Gerada, C., Rashed, M., & Benarous, M. Practical Implementation and Associated Challenges of Integrated Torque Limiter

Evolving of aircraft design towards further electrification requires safe and fault-free operation of all the components. More electric aircraft are increasingly utilizing electro-mechanical actuators (EMA). EMAs are prone to jamming and subsequent f... Read More about Practical Implementation and Associated Challenges of Integrated Torque Limiter.

Improved Propulsion Motor Design for a Twelve Passenger All-Electric Aircraft (2021)
Presentation / Conference Contribution
Hebala, A., Nuzzo, S., Connor, P. H., Giangrande, P., Gerada, C., & Galea, M. (2021, April). Improved Propulsion Motor Design for a Twelve Passenger All-Electric Aircraft. Presented at IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD 2021), Modena, Italy

This paper investigates the design of a 12-seater aircraft electric propulsion motor (ProMo). The design procedures aim to improve the performance of a previously designed motor, while adding further restrictions to the electrical and thermal boundar... Read More about Improved Propulsion Motor Design for a Twelve Passenger All-Electric Aircraft.

4-MW Class High-Power-Density Generator for Future Hybrid-Electric Aircraft (2021)
Journal Article
Golovanov, D., Gerada, D., Sala, G., Degano, M., Trentin, A., Connor, P. H., Xu, Z., Rocca, A. L., Galassini, A., Tarisciotti, L., Eastwick, C. N., Pickering, S. J., Wheeler, P., Clare, J., Filipenko, M., & Gerada, C. (2021). 4-MW Class High-Power-Density Generator for Future Hybrid-Electric Aircraft. IEEE Transactions on Transportation Electrification, 7(4), 2952-2964. https://doi.org/10.1109/TTE.2021.3068928

This article describes the underpinning research, development, construction, and testing of a 4-MW multithree phase generator designed for a hybrid-electric aircraft propulsion system demonstrator. The aim of the work is to demonstrate gravimetric po... Read More about 4-MW Class High-Power-Density Generator for Future Hybrid-Electric Aircraft.

Research and Realization of High-Power Medium-Voltage Active Rectifier Concepts for Future Hybrid-Electric Aircraft Generation (2020)
Journal Article
Trentin, A., Sala, G., Tarisciotti, L., Galassini, A., Degano, M., Connor, P. H., Golovanov, D., Gerada, D., Xu, Z., La Rocca, A., Eastwick, C. N., Pickering, S. J., Wheeler, P., Clare, J. C., & Gerada, C. (2021). Research and Realization of High-Power Medium-Voltage Active Rectifier Concepts for Future Hybrid-Electric Aircraft Generation. IEEE Transactions on Industrial Electronics, 68(12), 11684-11695. https://doi.org/10.1109/TIE.2020.3040692

In this article, we describe the research and development of a 3 kV active rectifier for a 4 MW aerospace generator drive system demonstrator. The converter is fed by a multiphase high-speed/high-frequency permanent magnet generator. The main aim of... Read More about Research and Realization of High-Power Medium-Voltage Active Rectifier Concepts for Future Hybrid-Electric Aircraft Generation.

PM Halbach Arrays in Motors: Loss Reduction and Performance Improvements (2020)
Presentation / Conference Contribution
Hebala, A., Nuzzo, S., Connor, P. H., Giangrande, P., Gerada, C., & Galea, M. (2020, November). PM Halbach Arrays in Motors: Loss Reduction and Performance Improvements. Presented at 2020 23rd International Conference on Electrical Machines and Systems (ICEMS), Hamamatsu, Japan

© 2020 The Institute of Electrical Engineers of Japan. Halbach array configurations represent a common choice in high-performance electrical machines, since a stronger magnetic field is generated for the same Permanent Magnet (PM) volume. Hence, high... Read More about PM Halbach Arrays in Motors: Loss Reduction and Performance Improvements.

Energy Storage System Selection for Optimal Fuel Consumption of Aircraft Hybrid Electric Taxiing Systems (2020)
Journal Article
Recalde, A., Lukic, M., Hebala, A., Giangrande, P., Klumpner, C., Nuzzo, S., Connor, P. H., Atkin, J., Bozhko, S., & Galea, M. (2021). Energy Storage System Selection for Optimal Fuel Consumption of Aircraft Hybrid Electric Taxiing Systems. IEEE Transactions on Transportation Electrification, 7(3), 1870-1887. https://doi.org/10.1109/TTE.2020.3039759

IEEE Aircraft taxiing is conventionally performed using the main engines’ inefficient idle thrust. Therefore, in line with greener aviation, the electrification of taxiing is the most viable option to reduce emissions, noise, and fossil fuel consumpt... Read More about Energy Storage System Selection for Optimal Fuel Consumption of Aircraft Hybrid Electric Taxiing Systems.

Feasibility Design Study of High-Performance, High-Power-Density Propulsion Motor for Middle-Range Electric Aircraft (2020)
Presentation / Conference Contribution
Hebala, A., Nuzzo, S., Volpe, G., Connor, P. H., Giangrande, P., Gerada, C., & Galea, M. (2020, June). Feasibility Design Study of High-Performance, High-Power-Density Propulsion Motor for Middle-Range Electric Aircraft. Presented at 2020 IEEE 29th International Symposium on Industrial Electronics (ISIE), Delft, Netherlands

This paper deals with the design of a high power-density, high efficiency and low torque ripple propulsion motor for electric aircraft. The proposed design procedure resulted in a high-performance propulsion motor intended for a direct-drive solution... Read More about Feasibility Design Study of High-Performance, High-Power-Density Propulsion Motor for Middle-Range Electric Aircraft.

Thermal and Electromagnetic Stator Vent Design Optimisation for Synchronous Generators (2020)
Journal Article
Bersch, K., Nuzzo, S., Connor, P. H., Eastwick, C. N., Rolston, R., & Galea, M. (2021). Thermal and Electromagnetic Stator Vent Design Optimisation for Synchronous Generators. IEEE Transactions on Energy Conversion, 36(1), 207-217. https://doi.org/10.1109/tec.2020.3004393

© 2020 Institute of Electrical and Electronics Engineers Inc.. All rights reserved. This paper deals with the stator cooling of an air-cooled, synchronous generator with a power rating of 400 kVA, which has been improved by adding two radial vents to... Read More about Thermal and Electromagnetic Stator Vent Design Optimisation for Synchronous Generators.

Air-Cooling of a Hollow High-Speed Permanent Magnet Rotor (2019)
Presentation / Conference Contribution
Connor, P. H., La Rocca, A., Xu, Z., Degano, M., Eastwick, C. N., Pickering, S. J., & Gerada, C. (2019, May). Air-Cooling of a Hollow High-Speed Permanent Magnet Rotor. Presented at 2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019, San Diego, USA

This paper presents a computational fluid dynamics conjugate heat transfer analysis of internal and external cooling paths for a hollow high-speed permanent magnet rotor. Extracting magnet losses from high-speed permanent magnet rotors is challenging... Read More about Air-Cooling of a Hollow High-Speed Permanent Magnet Rotor.

Numerical investigations of convective phenomena of oil impingement on end-windings (2019)
Presentation / Conference Contribution
Connor, P. H., La Rocca, A., Xu, Z., Eastwick, C. N., Pickering, S. J., & Gerada, C. (2018, April). Numerical investigations of convective phenomena of oil impingement on end-windings. Presented at 9th International Conference on Power Electronics, Machines and Drives (PEMD 2018), Liverpool

A novel experimental rig for analysing intensive liquid cooling of highly power-dense electrical machine components has been developed. Coupled fluid flow and heat transfer have been modelled, using computational fluid dynamics (CFD), to inform the d... Read More about Numerical investigations of convective phenomena of oil impingement on end-windings.