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Professor CHRISTOPHER GERADA's Outputs (13)

Permanent Magnet Reduction by Current Harmonics Injection for Surface Permanent Magnet Machines (2021)
Presentation / Conference Contribution
De Gaetano, D., Sala, G., Degano, M., & Gerada, C. (2021, April). Permanent Magnet Reduction by Current Harmonics Injection for Surface Permanent Magnet Machines. Presented at 2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD 2021), Modena, Italy

This paper presents the analysis of multi-harmonic current injection in multi-three phase surface permanent magnet (SPM) machines. An analytical model, extended to a generic harmonic order, is used to describe and determine the no load flux density,... Read More about Permanent Magnet Reduction by Current Harmonics Injection for Surface Permanent Magnet Machines.

Influence of Airgap Length on Performance of High Power PM-Assisted Syn-Rel Machines (2020)
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.

Optimized Magnet wire size and Slot winding height for minimum AC losses in a Traction Machine (2020)
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.

Analysis and Modelling of High Frequency Effects on Synchronous Generator’s Armature Conductors (2020)
Presentation / Conference Contribution
Quadri, Q. H., Nuzzo, S., Gerada, C., & Galea, M. (2020, June). Analysis and Modelling of High Frequency Effects on Synchronous Generator’s Armature Conductors. Presented at IEEE 29th International Symposium on Industrial Electronics (ISIE 2020), Delft, Netherlands

This paper investigates the accuracy of the subdomain modelling technique for high frequency copper loss calculation in stator windings of synchronous generators. The methodology's accuracy is studied at a slot level up to 10 kHz against FE model wit... Read More about Analysis and Modelling of High Frequency Effects on Synchronous Generator’s Armature Conductors.

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.

A Hybrid Computational Tool to Analyze the Performance of Electric Machines with Reduced Content of Permanent Magnet (2020)
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.

Sensitivity Analysis of Machine Components Thermal Properties Effects on Winding Temperature (2019)
Presentation / Conference Contribution
Zhang, F., Gerada, D., Xu, Z., Zhang, H., & Gerada, C. (2019, August). Sensitivity Analysis of Machine Components Thermal Properties Effects on Winding Temperature. Presented at 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), Harbin, China

This paper investigates the sensitivity analysis of winding temperature to key parameters in electrical machine thermal design. With a validated 3D thermal model based on an existing 75kW traction machine for an electric vehicle, the methodology of t... Read More about Sensitivity Analysis of Machine Components Thermal Properties Effects on Winding Temperature.

Simplified Lumped Parameter Thermal Network for Short-Duty Dual Three-Phase Permanent Magnet Machines (2019)
Presentation / Conference Contribution
Giangrande, P., Madonna, V., Zhao, W., Wang, Y., Gerada, C., & Galea, M. (2019, August). Simplified Lumped Parameter Thermal Network for Short-Duty Dual Three-Phase Permanent Magnet Machines. Presented at 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), Harbin, China

© 2019 IEEE. Electrical machines are progressively being employed in an ever-increasing number of safety-critical applications (e.g. aerospace and automotive), which demand high performance as well as reliability features. The modular structure and t... Read More about Simplified Lumped Parameter Thermal Network for Short-Duty Dual Three-Phase Permanent Magnet Machines.

Equivalent Slot Thermal Conductivity and Back-iron Extension Effects on Machine Cooling (2019)
Presentation / Conference Contribution
Zhang, F., Gerada, D., Xu, Z., Zhang, H., & Gerada, C. (2019, August). Equivalent Slot Thermal Conductivity and Back-iron Extension Effects on Machine Cooling. Presented at 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), Harbin, China

Back-iron Extension (BIE) is an effective thermal management technique which reduces the winding temperatures by projecting part of the back iron into the center of slot, thereby shortening the heat transfer path between the coil and back iron. Based... Read More about Equivalent Slot Thermal Conductivity and Back-iron Extension Effects on Machine Cooling.

Reduced Order Lumped Parameter Thermal Network for Dual Three-Phase Permanent Magnet Machines (2019)
Presentation / Conference Contribution
Giangrande, P., Madonna, V., Nuzzo, S., Spagnolo, C., Gerada, C., & Galea, M. (2019, April). Reduced Order Lumped Parameter Thermal Network for Dual Three-Phase Permanent Magnet Machines. Presented at 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD), Athens, Greece

© 2019 IEEE. In recent years, electrical machines are employed in an ever-increasing number of safety-critical applications, which require high power density, along with a demanding level of reliability and/or fault-tolerance capability. Multi-phase... Read More about Reduced Order Lumped Parameter Thermal Network for Dual Three-Phase Permanent Magnet Machines.