All Outputs (122)

Analytical Model for the Open Circuit Field due to Different Magnetization Patterns of the rotor in the Slotless Machines
Presentation / Conference Contribution
Dave, N., Gerada, D., Vakil, G., Zhang, H., Li, J., & Gerada, C. (2022, September). Analytical Model for the Open Circuit Field due to Different Magnetization Patterns of the rotor in the Slotless Machines. Presented at ICEM 2022 XXV International Conference on Electrical Machines, Valencia, Spain

From the existing literature, the open circuit field due to different magnetisations of the rotor magnets is known. This includes field due to parallel, radial and Halbach magnetisation. This paper presents the generalised analytical model to represe... Read More about Analytical Model for the Open Circuit Field due to Different Magnetization Patterns of the rotor in the Slotless Machines.

Comparison of Aluminium and Copper Conductors in Hairpin Winding Design for High Power Density Traction Motors
Presentation / Conference Contribution
Petrelli, G., Cui, M., Zou, T., Sala, G., La Rocca, A., Barater, D., Franceschini, G., Gerada, D., Degano, M., & Gerada, C. (2022, September). Comparison of Aluminium and Copper Conductors in Hairpin Winding Design for High Power Density Traction Motors. Presented at International Conference on Electrical Machines (ICEM 2022), Valencia, Spain

Hairpin windings are becoming current/next generation solutions for traction motors of electric vehicles due to inherently reduced DC power losses and improved heat dissipation capability compared with random windings. Copper-based conductor has been... Read More about Comparison of Aluminium and Copper Conductors in Hairpin Winding Design for High Power Density Traction Motors.

Radial Force Analysis and Optimization of Interior Permanent Magnet Traction Motor for Reduction of Electromagnetic Vibration
Presentation / Conference Contribution
Li, H., Cui, M., Zou, T., Zhang, X., Zhang, H., Xu, Z., Gerada, D., & Gerada, C. (2022, September). Radial Force Analysis and Optimization of Interior Permanent Magnet Traction Motor for Reduction of Electromagnetic Vibration. Presented at International Conference on Electrical Machines (ICEM 2022), Valencia, Spain

Interior permanent magnet (IPM) machines are subject to rich harmonics of air-gap magnetic field, which correspond to electromagnetic forces and resulting noise, vibration, and harshness (NVH) issues. In this paper, the NVH issue is evaluated based o... Read More about Radial Force Analysis and Optimization of Interior Permanent Magnet Traction Motor for Reduction of Electromagnetic Vibration.

Power Loss and Performance Analysis of a Permanent Magnet Synchronous Motor for Actuator Applications
Presentation / Conference Contribution
Tameemi, A., Degano, M., Di Nardo, M., Murataliyev, M., Gerada, D., Xu, Z., & Gerada, C. (2022, September). Power Loss and Performance Analysis of a Permanent Magnet Synchronous Motor for Actuator Applications. Presented at 2022 International Conference on Electrical Machines (ICEM), Valencia, Spain

Permanent magnet synchronous motors are very suitable in applications demanding high power density with high performance requirements, such as in aerospace actuators. Achieving high performance targets while keeping the total weight of the electrical... Read More about Power Loss and Performance Analysis of a Permanent Magnet Synchronous Motor for Actuator Applications.

Challenges and Future opportunities of Hairpin Technologies
Presentation / Conference Contribution
Arzillo, A., Braglia, P., Nuzzo, S., Barater, D., Franceschini, G., Gerada, D., & Gerada, C. (2020, June). Challenges and Future opportunities of Hairpin Technologies. Presented at 2020 IEEE 29th International Symposium on Industrial Electronics (ISIE), Delft, Netherlands

Hairpin windings are seeing an ever-increasing application and development in electrical machines designed for high power and torque densities. In fact, due to their inherently high fill factor, they are very attractive in applications, such as trans... Read More about Challenges and Future opportunities of Hairpin Technologies.

Influence of Rotor Design on Electromagnetic Performance in Interior Permanent Magnet Machines
Presentation / Conference Contribution
Transi, T., Murataliyev, M., Degano, M., Preci, E., Gerada, D., & Gerada, C. (2020, October). Influence of Rotor Design on Electromagnetic Performance in Interior Permanent Magnet Machines. Presented at IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society, Singapore, Singapore

Nowadays, Interior Permanent Magnet Synchronous Machines (IPMSM) are widely adopted in various sectors such as automotive, railway or public transportation (e- buses, trams, etc.). Among the benefits that these machines present, they offer a number o... Read More about Influence of Rotor Design on Electromagnetic Performance in Interior Permanent Magnet Machines.

Optimized Magnet wire size and Slot winding height for minimum AC losses in a Traction Machine
Presentation / Conference Contribution
Bardalai, A., Gerada, D., Xu, Z., & Gerada, C. (2020, August). Optimized Magnet wire size and Slot winding height for minimum AC losses in a Traction Machine. Presented at 2020 International Conference on Electrical Machines (ICEM), Gothenburg

The demand for high performance electrical machines that combine high power density (kW/kg or kW/L), light – weighting and high efficiency have become more and more important in recent years. In these machines, mitigation of the parasitic losses asso... Read More about Optimized Magnet wire size and Slot winding height for minimum AC losses in a Traction Machine.

A Hybrid Computational Tool to Analyze the Performance of Electric Machines with Reduced Content of Permanent Magnet
Presentation / Conference Contribution
Ram Kumar, R. M., Khowja, M. R., Vakil, G., Gerada, D., Gerada, C., Paciura, K., & Fernandes, B. G. (2020, June). A Hybrid Computational Tool to Analyze the Performance of Electric Machines with Reduced Content of Permanent Magnet. Presented at IEEE Transportation Electrification Conference & Expo (ITEC 2020), Chicago, IL, USA

Electric vehicles (EVs) are equipped with interior permanent magnet (IPM) or permanent magnet assisted synchronous reluctance (PM-SynRel) machines because of their superior performance in field weakening region. The effect of saturation is more prono... Read More about A Hybrid Computational Tool to Analyze the Performance of Electric Machines with Reduced Content of Permanent Magnet.

An Analytical Approach for the Design of Innovative Hairpin Winding Layouts
Presentation / Conference Contribution
Arzillo, A., Nuzzo, S., Braglia, P., Franceschini, G., Barater, D., Gerada, D., & Gerada, C. (2020, August). An Analytical Approach for the Design of Innovative Hairpin Winding Layouts. Presented at 2020 International Conference on Electrical Machines (ICEM), Gothenburg, Sweden

This work deals with an analytical approach aimed at accurately predicting Joule losses in innovative hairpin winding layouts. While hairpin windings are seeing an everincreasing use in automotive and aerospace applications due to their inherently hi... Read More about An Analytical Approach for the Design of Innovative Hairpin Winding Layouts.

Comparison of slotted and slotless PM machines for high kW/kg aerospace applications
Presentation / Conference Contribution
Dave, N., Vakil, G., Xu, Z., Gerada, C., Zhang, H., & Gerada, D. (2020, November). Comparison of slotted and slotless PM machines for high kW/kg aerospace applications. Presented at 2020 23rd International Conference on Electrical Machines and Systems (ICEMS), Hamamatsu, Japan

With the ambitious targeted emissions reduction, the aircraft industry is moving towards drastically different aircraft architectures including hybrid-electric. These in turn require electrical machines with a step change improvement in power-density... Read More about Comparison of slotted and slotless PM machines for high kW/kg aerospace applications.

Rectangular and Random Conductors: AC Losses Evaluations and Manufacturing Considerations
Presentation / Conference Contribution
Preci, E., Valente, G., Bardalai, A., Transi, T., Zou, T., Gerada, D., Degano, M., Buticchi, G., & Gerada, C. (2020, October). Rectangular and Random Conductors: AC Losses Evaluations and Manufacturing Considerations. Presented at IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society, Singapore, Singapore

This paper presents a comparison between hairpin and random distributed winding in electrical machines for automotive applications. Indeed, the overall performance of an electrical drive system is seriously affected by its winding design. The conside... Read More about Rectangular and Random Conductors: AC Losses Evaluations and Manufacturing Considerations.

AC loss Analysis in Winding of Electrical Machines with varying Strands-in-hand and Bundle Shapes
Presentation / Conference Contribution
Bardalai, A., Gerada, D., Xu, Z., & Gerada, C. (2020, November). AC loss Analysis in Winding of Electrical Machines with varying Strands-in-hand and Bundle Shapes. Presented at 2020 23rd International Conference on Electrical Machines and Systems (ICEMS), Hamamatsu, Japan

This paper presents an investigation into the sensitivity of high-frequency AC effects on the winding with varying number of parallel strands. Based on numerical analysis, a methodology to segregate the losses into components is presented. It is show... Read More about AC loss Analysis in Winding of Electrical Machines with varying Strands-in-hand and Bundle Shapes.

Influence of Airgap Length on Performance of High Power PM-Assisted Syn-Rel Machines
Presentation / Conference Contribution
Zou, T., Gerada, D., Walker, A., Vakil, G., La Rocca, S., La Rocca, A., Paciura, K., Barden, R., Ernest, E., Zhu, S., Qayyum, N., McQueen, A., Bardalai, A., Ram Kumar, R. M., Marfoli, A., & Gerada, C. (2020, October). Influence of Airgap Length on Performance of High Power PM-Assisted Syn-Rel Machines. Presented at 2020 IEEE Energy Conversion Congress and Exposition (ECCE 2020), Detroit, MI, USA

In recent years, synchronous reluctance (Syn-Rel) machines are research hotspots in variable speed motor drives due to their robust rotor structure and wide constant power speed range (CPSR). More practically, when kVA limitation is considered, embed... Read More about Influence of Airgap Length on Performance of High Power PM-Assisted Syn-Rel Machines.

Improving the Saliency of a High Speed SynRel Rotor by using High Strength Martensitic Sleeve
Presentation / Conference Contribution
Ram Kumar, R. M., Vakil, G., La Rocca, A., Gerada, D., Gerada, C., & Fernandes, B. G. (2021, January). Improving the Saliency of a High Speed SynRel Rotor by using High Strength Martensitic Sleeve. Presented at 2021 International Conference on Sustainable Energy and Future Electric Transportation (SEFET), Hyderabad, India

High strength magnetic steel laminations are the invariable choice to achieve the power density demands of high speed electric machines required in the automotive industry. However, the cost competitive automobile market, favours the use of conventio... Read More about Improving the Saliency of a High Speed SynRel Rotor by using High Strength Martensitic Sleeve.

Impact of Stator Segmentation on the Performance of Aerospace Propulsion Machines
Presentation / Conference Contribution
Ramanathan Mathavan Jeyabalan, R. K., Vakil, G., Gerada, D., Gerada, C., & Minshull, J. Impact of Stator Segmentation on the Performance of Aerospace Propulsion Machines. Presented at AeroTech, Pasadena California, United States

Electric machines offering a high power density are required for aerospace applications. Soft magnetic material with a high saturation flux density is one of the key component which is required to realize these power density targets. The need for a h... Read More about Impact of Stator Segmentation on the Performance of Aerospace Propulsion Machines.

A Novel Airgap Permeance Modeling Approach for Magnetic Field Analysis of Electrical Machines Based on Electrostatic FEA
Presentation / Conference Contribution
Cui, M., Zou, T., Li, D., Gerada, D., Qu, R., & Gerada, C. (2022, October). A Novel Airgap Permeance Modeling Approach for Magnetic Field Analysis of Electrical Machines Based on Electrostatic FEA. Presented at IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific 2022), Haining, China

Detailed airgap permeance information is of great importance for analyzing the operation principle and optimizing the electromagnetic field distribution of an electric machine with unconventional topology. So far, analytical approaches upon calculati... Read More about A Novel Airgap Permeance Modeling Approach for Magnetic Field Analysis of Electrical Machines Based on Electrostatic FEA.

A Taguchi-LHS-RSM Double-Staged Approach for Design Optimization of Self-Ventilated Cooling Systems Utilized in PMSMs
Presentation / Conference Contribution
Zhu, G., Xu, Z., Zhang, F., Gerada, C., & Gerada, D. (2023, November). A Taguchi-LHS-RSM Double-Staged Approach for Design Optimization of Self-Ventilated Cooling Systems Utilized in PMSMs. Presented at 26th International Conference on Electrical Machines and Systems (ICEMS), Zhuhai, China

Thermal management is critical for high-power-density permanent magnet synchronous machines (PMSMs). To realize the efficient and effective design optimization of self-ventilated air cooling systems for PMSMs, in this paper, a Taguchi-preconditioned... Read More about A Taguchi-LHS-RSM Double-Staged Approach for Design Optimization of Self-Ventilated Cooling Systems Utilized in PMSMs.

Comparative Study on Stranded and Hairpin Windings for 350kW EV Traction Motor
Presentation / Conference Contribution
Jiang, J., Zou, T., Rocca, S. L., Gerada, D., & Gerada, C. (2023, November). Comparative Study on Stranded and Hairpin Windings for 350kW EV Traction Motor. Presented at 2023 26th International Conference on Electrical Machines and Systems (ICEMS), Zhuhai, China

Hairpin winding is a key technology for traction motors to meet the step-change requirements on power density and efficiency in electrical vehicle (EV) industry. This winding solution features inherently high slot fill factor and improved heat dissip... Read More about Comparative Study on Stranded and Hairpin Windings for 350kW EV Traction Motor.

Design of Hairpin Winding and Random Winding Stators for High Speed Heavy-Duty Traction Motor
Presentation / Conference Contribution
Jiang, J., Zou, T., La Rocca, A., La Rocca, S., Liu, C., Xu, Z., Gerada, C., Zhu, S., Paciura, K., & Gerada, D. (2023, October). Design of Hairpin Winding and Random Winding Stators for High Speed Heavy-Duty Traction Motor. Presented at 2023 IEEE Vehicle Power and Propulsion Conference (VPPC), Milan, Italy

Hairpin winding with rectangularly shaped conductors are gradually replacing random winding wound with stranded wires in electric vehicle (EV) industry. As the newgeneration winding technology, hairpin winding features high electromagnetic and therma... Read More about Design of Hairpin Winding and Random Winding Stators for High Speed Heavy-Duty Traction Motor.

A topology selection consideration of electrical machines for traction applications: towards the FreedomCar 2020 targets
Presentation / Conference Contribution
Walker, A., Galea, M., Gerada, C., Mebarki, A., & Gerada, D. (2015, March). A topology selection consideration of electrical machines for traction applications: towards the FreedomCar 2020 targets. Presented at 2015 Tenth International Conference on Ecological Vehicles and Renewable Energies (EVER), Monte Carlo

This paper details a qualitative comparison between different types of electrical machine for hybrid electric vehicle traction applications. Targets set by the US Department of Energy for the year 2020 are used as goals. Several types of machine for... Read More about A topology selection consideration of electrical machines for traction applications: towards the FreedomCar 2020 targets.