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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.

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.

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.

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.

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.