Outputs (11)

Highly Manufacturable Edgewise Winding Design Integrating Cooling Solutions for High Power Density Applications (2024)
Presentation / Conference Contribution
George, E., Walker, A., Zhang, F., Vakil, G., & Gerada, C. (2024, October). Highly Manufacturable Edgewise Winding Design Integrating Cooling Solutions for High Power Density Applications. Presented at 2024 IEEE Vehicle Power and Propulsion Conference, VPPC 2024, Washington, DC, USA

Edgewise winding is reported recently for high-performance electric machines. However, to achieve widespread uptake of electric machines, it is essential to consider the manufacturing time of the complete machine solution. For example, with different... Read More about Highly Manufacturable Edgewise Winding Design Integrating Cooling Solutions for High Power Density Applications.

In-Slot Oil Cooling Arrangement of Hairpin Windings for High Power Density EV Traction Motors (2024)
Presentation / Conference Contribution
Mifsud, L. P., Connor, P. H., Walker, A., Zou, T., Huang, H., Ren, X., Batho, G., Tweedy, O., Gerada, C., & Egger, C. (2024, October). In-Slot Oil Cooling Arrangement of Hairpin Windings for High Power Density EV Traction Motors. Presented at 2024 IEEE Vehicle Power and Propulsion Conference, VPPC 2024, Washington, DC, USA

Ambitious electrification roadmaps for the automotive industry have prompted a revolution in winding technology for traction motors in electric vehicles (EV). Hairpin windings with reduced power losses and improved coolability are overtaking the mark... Read More about In-Slot Oil Cooling Arrangement of Hairpin Windings for High Power Density EV Traction Motors.

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.

Enhancing the Torque Density of Conventional PM-SynRel Machine with Hybrid Flux Barrier (2019)
Presentation / Conference Contribution
Kumar, R. M. R., Vakil, G., Gerada, D., Walker, A., La Rocca, S., Al-Ani, M., Gerada, C., Paciura, K., McQueen, A., & Fernandes, B. G. (2019, October). Enhancing the Torque Density of Conventional PM-SynRel Machine with Hybrid Flux Barrier. Presented at 45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019), Lisbon, Portugal

Electrical machines with high torque density are required for traction application. Availability of bonded magnets with complex shapes and magnetization pattern can significantly extend the design space of electrical machines. This paper introduces a... Read More about Enhancing the Torque Density of Conventional PM-SynRel Machine with Hybrid Flux Barrier.

High Power High Speed PM-Assisted SynRel Machines with Ferrite and Rare Earth Magnets for Future Electric Commercial Vehicles (2019)
Presentation / Conference Contribution
Kumar, R. M. R., Zou, T., La Rocca, A., Vakil, G., Gerada, D., Walker, A., Gerada, C., Paciura, K., McQueen, A., & Fernandes, B. G. (2019, October). High Power High Speed PM-Assisted SynRel Machines with Ferrite and Rare Earth Magnets for Future Electric Commercial Vehicles. Presented at 45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019), Lisbon, Portugal

High power density and high torque density are the fundamental requirements for electric machines used in traction application. The former is obtained by potentially increasing the speed of the machine while the latter by using high energy density ra... Read More about High Power High Speed PM-Assisted SynRel Machines with Ferrite and Rare Earth Magnets for Future Electric Commercial Vehicles.

Numerical study of the impact of different cooling arrangements on a high length/diameter ratio motor for electric commercial vehicle (2019)
Presentation / Conference Contribution
La Rocca, S., La Rocca, A., Walker, A., Vakil, G., Gerada, D., Al-Ani, M., Zou, T., Ramanathan, R., Gerada, C., McQueen, A., & Paciura, K. (2019, October). Numerical study of the impact of different cooling arrangements on a high length/diameter ratio motor for electric commercial vehicle. Presented at International Conference on Electrotechnical Complexes and Systems (ICOECS 2019), Ufa, Russia

Computational Fluid Dynamics (CFD) was used to carry out a fluid flow and thermal investigation of a high power dense traction machine for electric commercial vehicle. One of the features of the machine design considered is the high Length/Diameter (... Read More about Numerical study of the impact of different cooling arrangements on a high length/diameter ratio motor for electric commercial vehicle.

Improved thermal management and analysis for stator end-windings of electrical machines (2018)
Journal Article
Madonna, V., Walker, A., Giangrande, P., Serra, G., Gerada, C., & Galea, M. (2019). Improved thermal management and analysis for stator end-windings of electrical machines. IEEE Transactions on Industrial Electronics, 66(7), 5057-5069. https://doi.org/10.1109/tie.2018.2868288

In electrical machine design, thermal management plays a key role in improving performance and reducing size. End-windings are commonly identified as the machine hot-spot. Hence, lowering and predicting end-windings temperature are crucial tasks in t... Read More about Improved thermal management and analysis for stator end-windings of electrical machines.

Novel core designs to miniaturise passive magnetic components (2018)
Presentation / Conference Contribution
Walker, A., Vakil, G., & Gerada, C. (2018, June). Novel core designs to miniaturise passive magnetic components. Presented at ITEC 2018

Converter sizes are often dominated by passive magnetic components. Passive magnetic component sizes are in turn limited by electromagnetic saturation and thermal limits. This paper covers two modifications to the air gaps of tape wound amorphous mag... Read More about Novel core designs to miniaturise passive magnetic components.

Evaluation of isolated DC/DC converter topologies for future HVDC aerospace microgrids (2017)
Presentation / Conference Contribution
Tarisciotti, L., Costabeber, A., Linglin, C., Walker, A., & Galea, M. (2017, October). Evaluation of isolated DC/DC converter topologies for future HVDC aerospace microgrids. Presented at 2017 IEEE Energy Conversion Congress and Exposition (ECCE), Cincinnati, OH, USA

High performance power conversion equipment is currently gaining an increasing interest for aircraft applications. In particular, isolated bidirectional DC/DC converters are often proposed for modern HVDC aircraft distribution systems. For such reaso... Read More about Evaluation of isolated DC/DC converter topologies for future HVDC aerospace microgrids.

Design optimization of a short-term duty electrical machine for extreme environment (2017)
Journal Article
Arumugam, P., Amankwah, E. K., Walker, A., & Gerada, C. (2017). Design optimization of a short-term duty electrical machine for extreme environment. IEEE Transactions on Industrial Electronics, 64(12), 9784-9794. https://doi.org/10.1109/TIE.2017.2711555

This paper presents design optimisation of a short term duty electrical machine for extreme environments of high temperature and high altitudes. For such extreme environmental conditions of above 80⁰C and altitudes of 30km, thermal loading limits are... Read More about Design optimization of a short-term duty electrical machine for extreme environment.