Professor CHRISTOPHER GERADA's Outputs (460)

Design Optimization of Spoke-type Flux-intensifying PM Motor with Asymmetric Rotor Configuration for Improved Performance (2024)
Journal Article
Hsieh, M.-F., Huynh, A. T., Do, V.-V., Gerada, D., & Gerada, C. (2024). Design Optimization of Spoke-type Flux-intensifying PM Motor with Asymmetric Rotor Configuration for Improved Performance. IEEE Transactions on Magnetics, 60(9), Article 8203905. https://doi.org/10.1109/tmag.2024.3428416

This article explores enhancing spoke-type flux-intensifying permanent magnet (SFI-PM) motor performance by strategically placing flux barriers (FBs) in the asymmetric rotor. Integrating multi-FBs into the conventional spoke-type PM (CSPM) rotor topo... Read More about Design Optimization of Spoke-type Flux-intensifying PM Motor with Asymmetric Rotor Configuration for Improved Performance.

AFPM Machines Equipped with Multilayer Magnets (2024)
Journal Article
Darmani, M. A., Pošković, E., Franchini, F., Ferraris, L., Cavagnino, A., & Gerada, C. (2024). AFPM Machines Equipped with Multilayer Magnets. IEEE Transactions on Energy Conversion, https://doi.org/10.1109/tec.2024.3420133

This article investigates the manufacturability and applicability of unified multilayer magnets, comprising two different magnetic materials with distinct characteristics, for use in electrical machines. In particular, the self-produced multilayer ma... Read More about AFPM Machines Equipped with Multilayer Magnets.

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.

Humidity Impact on Streamer Inception Parameters for Turn-to-Turn Insulation of Inverter-Fed Motors (2024)
Presentation / Conference Contribution
Naderiallaf, H., Ji, Y., Giangrande, P., Galea, M., Degano, M., & Gerada, C. (2024, June). Humidity Impact on Streamer Inception Parameters for Turn-to-Turn Insulation of Inverter-Fed Motors. Presented at 2024 IEEE 5th International Conference on Dielectrics (ICD), Toulouse, France

This study explores the impact of varying relative humidity (RH) levels (30%-90%) at 90°C on streamer inception parameters (SIPs) compared to those at 25°C. Schumann's streamer inception criterion (SCSIC) is used to assess the vulnerability of turn-t... Read More about Humidity Impact on Streamer Inception Parameters for Turn-to-Turn Insulation of Inverter-Fed Motors.

Investigation on the Torsional–Flexural Instability Phenomena during the Bending Process of Hairpin Windings: Experimental Tests and FE Model Validation (2024)
Journal Article
Mangeruga, V., Barbieri, S. G., Giacopini, M., Giuradei, F., Vai, P., & Gerada, C. (2024). Investigation on the Torsional–Flexural Instability Phenomena during the Bending Process of Hairpin Windings: Experimental Tests and FE Model Validation. Machines, 12(6), Article 396. https://doi.org/10.3390/machines12060396

Modern electric motors developed for the automotive industry have an ever higher power density with a relatively compact size. Among the various existing solutions to improve torque and power density, a reduction in the dimensions of the end-windings... Read More about Investigation on the Torsional–Flexural Instability Phenomena during the Bending Process of Hairpin Windings: Experimental Tests and FE Model Validation.

Fast Flux Maps Computation of Synchronous Reluctance Machines With and Without Permanent Magnets Assistance (2024)
Journal Article
Gallicchio, G., Nardo, M. D., Cupertino, F., Varvolik, V., Buticchi, G., Degano, M., & Gerada, C. (2024). Fast Flux Maps Computation of Synchronous Reluctance Machines With and Without Permanent Magnets Assistance. IEEE Transactions on Industry Applications, 60(5), 6725-6735. https://doi.org/10.1109/TIA.2024.3403967

This paper proposes a computational efficient and accurate hybrid analytical-finite element (FE) performance prediction methodology for synchronous reluctance (SyR) machines. The hybrid procedure consists in solving the d- and q-axis magnetic equival... Read More about Fast Flux Maps Computation of Synchronous Reluctance Machines With and Without Permanent Magnets Assistance.

Investigation on the torsional property of hybrid composite/metal shafts at different service temperatures: Experimental and analytical study (2024)
Journal Article
Qi, W., Xu, Z., Wan, Y., Gerada, D., & Gerada, C. (2024). Investigation on the torsional property of hybrid composite/metal shafts at different service temperatures: Experimental and analytical study. Polymer Composites, 45(12), 11266-11275. https://doi.org/10.1002/pc.28564

Torsional tests were conducted to investigate the influence of service temperature on torsional property of composite/steel hybrid structures. In the experiment, two types of lightweight hybrid composite‐metal shafts were tested at both room temperat... Read More about Investigation on the torsional property of hybrid composite/metal shafts at different service temperatures: Experimental and analytical study.

Research on Matching Interpolation Functions and Field Calculation Methods in Multi-Material Topology Optimization of Electric Machine (2024)
Presentation / Conference Contribution
He, X., Yan, L., Chen, I., Gerada, C., Liu, X., Du, N., & Yang, X. (2024, May). Research on Matching Interpolation Functions and Field Calculation Methods in Multi-Material Topology Optimization of Electric Machine. Presented at 2024 IEEE 7th International Electrical and Energy Conference (CIEEC), Harbin, China

The Solid Isotropic Material with Penalization (SIMP) method is highly regarded in the field of topology optimization due to its ease of implementation and conceptual clarity. However, in the realm of multi-material topology optimization for electric... Read More about Research on Matching Interpolation Functions and Field Calculation Methods in Multi-Material Topology Optimization of Electric Machine.

A Review of Carbon Emissions from Electrical Machine Materials (2024)
Journal Article
Zhang, X., Gerada, D., Xu, Z., Zhang, F., & Gerada, C. (2024). A Review of Carbon Emissions from Electrical Machine Materials. Electronics, 13(9), Article 1714. https://doi.org/10.3390/electronics13091714

As the world embarks on a global mission to tackle climate change, reducing carbon represents a key challenge given the escalating global warming. The U.K. is among many other nations that are determined to decarbonise all sectors and strive to achie... Read More about A Review of Carbon Emissions from Electrical Machine Materials.

Permanent Magnet Assisted Synchronous Reluctance Machine Design for Light Traction Applications (2024)
Journal Article
Nardo, M. D., Gallicchio, G., Cupertino, F., Korman, O., Wang, M., Gerada, C., Varvolik, V., Wang, S., & Buticchi, G. (2024). Permanent Magnet Assisted Synchronous Reluctance Machine Design for Light Traction Applications. IEEE Transactions on Industry Applications, 60(4), 6079-6091. https://doi.org/10.1109/tia.2024.3384481

This paper presents a systematic comparative design study of permanent magnet assisted synchronous reluctance (PMaSyR) machines for a light traction application aimed at considering an holistic approach for a given outer envelope and cooling system s... Read More about Permanent Magnet Assisted Synchronous Reluctance Machine Design for Light Traction Applications.

Analysis of longitudinal-vertical coupling vibration of four hub motors driven electric vehicle under unsteady condition (2024)
Journal Article
Li, Q., Ma, C., Zhang, N., Guo, Y., Degano, M., Gerada, C., Zhou, S., & An, Y. (2024). Analysis of longitudinal-vertical coupling vibration of four hub motors driven electric vehicle under unsteady condition. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, https://doi.org/10.1177/09544070241230700

The influence of hub motor unbalanced magnetic force (UMF) on the vibration of electric vehicle under steady state conditions has been known, but under unsteady conditions, the hub motor UMF will change with the vehicle operation condition, and there... Read More about Analysis of longitudinal-vertical coupling vibration of four hub motors driven electric vehicle under unsteady condition.

Life Characterization of PEEK and Nanofilled Enamel Insulated Wires Under Thermal Ageing (2024)
Journal Article
Khowja, M. R., Vakil, G., Ahmad, S. S., Ramanathan, R., Gerada, C., & Benarous, M. (2024). Life Characterization of PEEK and Nanofilled Enamel Insulated Wires Under Thermal Ageing. IEEE Access, 12, 39470- 39483. https://doi.org/10.1109/access.2024.3374637

This paper characterizes and develops life models for two different wire insulating materials: Poly-ether-ketone (PEEK) and nanofilled enamel (Allotherm wire). The article focuses on predicting the lifespan of PEEK and Allotherm wire insulating mater... Read More about Life Characterization of PEEK and Nanofilled Enamel Insulated Wires Under Thermal Ageing.

Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors (2024)
Journal Article
Naderiallaf, H., Degano, M., Gerada, C., & Gerada, D. (2024). Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors. IEEE Transactions on Dielectrics and Electrical Insulation, 31(4), 2084-2093. https://doi.org/10.1109/tdei.2024.3355032

This contribution elucidates the impact of the fillet radius, a geometric feature of rectangular insulated wires not commonly considered, on the partial discharge inception voltage (PDIV) in low-voltage machine turn-to-turn winding insulation. Initia... Read More about Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors.

Modeling Air Pressure Impact on PDIV for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors under Different Voltage Waveform Excitations (2024)
Journal Article
Naderiallaf, H., Degano, M., & Gerada, C. (2024). Modeling Air Pressure Impact on PDIV for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors under Different Voltage Waveform Excitations. IEEE Access, 12, 176232-176246. https://doi.org/10.1109/ACCESS.2024.3506053

This study investigates the partial discharge inception voltage (PDIV) in turn-to-turn insulation of form-wound windings in inverter-fed motors under nine different air pressures, ranging from 1013 mbar to 10 mbar. The research evaluates three voltag... Read More about Modeling Air Pressure Impact on PDIV for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors under Different Voltage Waveform Excitations.

Additive manufacturing of Nd-Fe-B permanent magnets and their application in electrical machines (2024)
Journal Article
Wu, J., Korman, O., Di Nardo, M., Degano, M., Gerada, C., Ashcroft, I., J.M. Hague, R., & T. Aboulkhair, N. (2024). Additive manufacturing of Nd-Fe-B permanent magnets and their application in electrical machines. IEEE Access, 12, 138921-138931. https://doi.org/10.1109/ACCESS.2024.3436643

Powder Bed Fusion - Laser Beam (PBF-LB), a form of additive manufacturing (AM) for Nd-Fe-B permanent magnets, is attracting substantial interest for its ability to process functional magnetic materials while capitalizing on AM's design flexibility an... Read More about Additive manufacturing of Nd-Fe-B permanent magnets and their application in electrical machines.

Design and Controllability Trade-Off in Dual Three-Phase Winding PMSMs (2023)
Presentation / Conference Contribution
Zhu, S., Qayyum, N., Ernest, E., Paciura, K., Zou, T., & Gerada, C. (2023, October). Design and Controllability Trade-Off in Dual Three-Phase Winding PMSMs. Presented at 2023 IEEE Energy Conversion Congress and Exposition (ECCE), Nashville, TN, USA

Designing and controlling dual three-phase motor poses significant challenges. The conventional mathematical model of such motors only considers fundamental components, thereby failing to capture the complete characteristics of the motors. In this st... Read More about Design and Controllability Trade-Off in Dual Three-Phase Winding PMSMs.

Reduced Computational Burden of Modulated Model-Predictive Control for Synchronous Reluctance Motor Drive Applications (2023)
Presentation / Conference Contribution
Riccio, J., Karamanakos, P., Degano, M., Gerada, C., & Zanchetta, P. (2023, October). Reduced Computational Burden of Modulated Model-Predictive Control for Synchronous Reluctance Motor Drive Applications. Presented at 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023, Nashville, TN. USA

This paper introduces a novel geometric approach to significantly reduce the computational burden of modulated predictive controllers while maintaining the same steady-state performance and satisfactory dynamic behavior. The proposed geometric method... Read More about Reduced Computational Burden of Modulated Model-Predictive Control for Synchronous Reluctance Motor Drive Applications.

Accurate FEA Modeling Approach for Calculating AC Copper Loss for Random Windings (2023)
Presentation / Conference Contribution
Dave, N., Gerada, D., Langlois, P., Lawton, A., Patel, R., & Gerada, C. (2023, November). Accurate FEA Modeling Approach for Calculating AC Copper Loss for Random Windings. Presented at 2023 26th International Conference on Electrical Machines and Systems (ICEMS), Zhuhai, China

With increased interest in transportation electrification, the accurate modelling and analysis technique of AC copper loss plays a crucial role in the design. The distributed wound stator is dominant in electric car motors due to their suitable chara... Read More about Accurate FEA Modeling Approach for Calculating AC Copper Loss for Random Windings.

Manufacturable Edgewise Winding Solutions Considering Parallel Slot and Parallel Tooth Stator Structures (2023)
Presentation / Conference Contribution
George, L., Walker, A., Zhang, F., Vakil, G., & Gerada, C. (2023, December). Manufacturable Edgewise Winding Solutions Considering Parallel Slot and Parallel Tooth Stator Structures. Presented at 2023 IEEE 2nd Industrial Electronics Society Annual On-Line Conference (ONCON), SC, USA

Due to climate concerns, the push towards transportation electrification to deliver electric machines capable of high-power density performance is becoming increasingly critical. A key component of this is the structure and manufacture of the winding... Read More about Manufacturable Edgewise Winding Solutions Considering Parallel Slot and Parallel Tooth Stator Structures.

Novel End-Winding Hybrid Flux Machine (2023)
Journal Article
Shi, B., Huang, X., Li, J., Zhang, H., Zhao, H., Zhang, X., Zhang, F., & Gerada, C. (2023). Novel End-Winding Hybrid Flux Machine. IEEE Access, 11, 133781-133791. https://doi.org/10.1109/access.2023.3336675

This paper presents a novel motor topology, called the End-Winding Flux Machine (EWM), which explores the potential function of end-windings in rotating electric machines. By introducing an axial-radial flux stator into the end-windings, a hybrid flu... Read More about Novel End-Winding Hybrid Flux Machine.