Professor CHRISTOPHER GERADA's Outputs (39)

Modeling of Classical Synchronous Generators Using Size-Efficient Lookup Tables With Skewing Effect (2019)
Journal Article
Quadri, Q. H., Nuzzo, S., Rashed, M., Gerada, C., & Galea, M. (2019). Modeling of Classical Synchronous Generators Using Size-Efficient Lookup Tables With Skewing Effect. IEEE Access, 7, 174551-174561. https://doi.org/10.1109/access.2019.2957102

In this paper, an analytical model aimed at reducing computational times for the analysis of classical synchronous generators is proposed and validated. While the proposed model's attractiveness comes from its simple and fast nature, however, it also... Read More about Modeling of Classical Synchronous Generators Using Size-Efficient Lookup Tables With Skewing Effect.

An Analytical Subdomain Model for Dual-Rotor Permanent Magnet Motor With Halbach Array (2019)
Journal Article
Golovanov, D., & Gerada, C. (2019). An Analytical Subdomain Model for Dual-Rotor Permanent Magnet Motor With Halbach Array. IEEE Transactions on Magnetics, 55(12), Article 8205216. https://doi.org/10.1109/tmag.2019.2941699

© 1965-2012 IEEE. This article describes the development of an exact analytical model for predicting magnetic field distribution within active parts of a dual-rotor (DR) permanent magnet (PM) synchronous machine with a Halbach array. The model is bas... Read More about An Analytical Subdomain Model for Dual-Rotor Permanent Magnet Motor With Halbach Array.

Analytical Tool to Generate Torque-Speed Characteristics for Surface Mounted PM Machines in Constant Torque and Field Weakening Regions (2019)
Presentation / Conference Contribution
Khowja, M. R., Vakil, G., & Gerada, C. (2019, October). Analytical Tool to Generate Torque-Speed Characteristics for Surface Mounted PM Machines in Constant Torque and Field Weakening Regions. Presented at IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, Lisbon, Portugal

This paper presents an analytical tool to generate torque vs speed characteristics of the surface-mounted permanent magnet machines to minimize the computation time and efforts. The paper also derives an expression of d-axis current in the field weak... Read More about Analytical Tool to Generate Torque-Speed Characteristics for Surface Mounted PM Machines in Constant Torque and Field Weakening Regions.

Multi-physics Design Optimisation of PM-assisted Synchronous Reluctance Motor for Traction Application (2019)
Presentation / Conference Contribution
Al-Ani, M., Walker, A., Vakil, G., Ramanathan, R., Zou, T., La Rocca, S., La Rocca, A., Gerada, D., Gerada, C., Paciura, K., & McQueen, A. (2019, October). Multi-physics Design Optimisation of PM-assisted Synchronous Reluctance Motor for Traction Application. Presented at IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, Lisbon, Portugal

Recently, the synchronous reluctance machine limits have been pushed toward meeting the requirements of traction applications. A skilled electromagnetic architecture of a synchronous reluctance machine with the help of permanent magnets can push the... Read More about Multi-physics Design Optimisation of PM-assisted Synchronous Reluctance Motor for Traction Application.

Fault-Tolerant Electrical Machines for Transport Applications (2019)
Presentation / Conference Contribution
Ismagilov, F., Gerada, C., Degano, M., Gurevich, O., Guliyenko, A., Vavilov, V., & Gusakov, D. (2019, October). Fault-Tolerant Electrical Machines for Transport Applications. Presented at 2019 International Conference on Electrotechnical Complexes and Systems (ICOECS), Ufa, Russia

This paper provides an overview of-fault-Tolerant electric machine for transport applications. A number of motor failure cases and methods to prevent or minimize their impact on the drive system are considered. The fault tolerance of bearings, stator... Read More about Fault-Tolerant Electrical Machines for Transport Applications.

Reduction of Winding AC Losses by Accurate Conductor Placement in High Frequency Electrical Machines (2019)
Journal Article
Bardalai, A., Gerada, D., Golovanov, D., Xu, Z., Zhang, X., Li, J., Zhang, H., & Gerada, C. (2020). Reduction of Winding AC Losses by Accurate Conductor Placement in High Frequency Electrical Machines. IEEE Transactions on Industry Applications, 56(1), 183-193. https://doi.org/10.1109/TIA.2019.2947552

© 1972-2012 IEEE. In the design of electrical machines, the increase in power density has become one of the main research themes. With most of the power loss in high power density electrical machines often being generated in the stator winding assemb... Read More about Reduction of Winding AC Losses by Accurate Conductor Placement in High Frequency Electrical Machines.

Thermal Barrier for High-Voltage Permanent Magnet Synchronous Motor with Air-cooling Hybrid Ventilation Systems (2019)
Presentation / Conference Contribution
Zhang, X., Zhang, H., Li, W., Gerada, C., Gerada, D., & Li, J. (2019, August). Thermal Barrier for High-Voltage Permanent Magnet Synchronous Motor with Air-cooling Hybrid Ventilation Systems. Presented at 2019 22nd International Conference on Electrical Machines and Systems (ICEMS), Harbin, China

This paper addresses the thermal network improvement in a 315 kW high-voltage solid rotor permanent magnet synchronous motor, with a hybrid air-cooling system, by the proposed thermal barrier. The multi-coupled fields, as electromagnetic fields, flui... Read More about Thermal Barrier for High-Voltage Permanent Magnet Synchronous Motor with Air-cooling Hybrid Ventilation Systems.

Designing an Advanced Electrical Motor for Propulsion of Electric Aircraft (2019)
Presentation / Conference Contribution
Golovanov, D., Xu, Z., Gerada, D., Page, A., Gerada, C., & Sawata, T. (2019, August). Designing an Advanced Electrical Motor for Propulsion of Electric Aircraft. Presented at AIAA Propulsion and Energy Forum and Exposition, 2019, Indianapolis, IN

A prototype motor rated for 500 kW 3,000 rpm has been developed for aircraft electric propulsion. The design of the motor was optimized using a coupled parameter problem of electromagnetic, mechanical and thermal performances. A high power density of... Read More about Designing an Advanced Electrical Motor for Propulsion of Electric Aircraft.

Vibration Analysis of Permanent-Magnet-Assisted Synchronous Reluctance Machines (2019)
Presentation / Conference Contribution
Li, J., Mahmoud, H., Degano, M., & Gerada, C. (2019, August). Vibration Analysis of Permanent-Magnet-Assisted Synchronous Reluctance Machines. Presented at 2019 22nd International Conference on Electrical Machines and Systems, ICEMS 2019, Harbin, China

paper focuses on the NVH response analyses of Permanent Magnet Assisted Synchronous Reluctance (PMaSynRel) machines. This kind of motors has a complex rotor geometry which leads to have high harmonic contents in the electromagnetic excitation. As an... Read More about Vibration Analysis of Permanent-Magnet-Assisted Synchronous Reluctance Machines.

Torque Ripple Reduction in Sectored Multi Three-Phase Machines Based on PWM Carrier Phase Shift (2019)
Journal Article
Wang, X., Sala, G., Zhang, H., Gu, C., Buticchi, G., Formentini, A., Gerada, C., & Wheeler, P. (2020). Torque Ripple Reduction in Sectored Multi Three-Phase Machines Based on PWM Carrier Phase Shift. IEEE Transactions on Industrial Electronics, 67(6), 4315-4325. https://doi.org/10.1109/TIE.2019.2931239

The interest in multiphase machines for high power and reliable drives has been growing, and many control algorithms have been proposed to improve their torque performance. This work presents a new approach to the modeling of a multi three-phase driv... Read More about Torque Ripple Reduction in Sectored Multi Three-Phase Machines Based on PWM Carrier Phase Shift.

A SiC based 2-Level Power Converter for Shape-and-Space-Restricted Aerospace Applications (2019)
Presentation / Conference Contribution
Nasir, U., Chowdhury, S., La Rocca, A., Chen, Y., Yang, T., Wheeler, P., Gerada, C., & Bozhko, S. (2019, July). A SiC based 2-Level Power Converter for Shape-and-Space-Restricted Aerospace Applications. Presented at 2019 IEEE 13th International Conference on Power Electronics and Drive Systems (PEDS), Toulouse, France

Recent advancements in the power electronic device technologies, such as wide-band-gap devices including Silicon-Carbide (SiC) and Galium-Nitride (GaN), are acting as an enabling factor in development of compact power electronic systems. More specifi... Read More about A SiC based 2-Level Power Converter for Shape-and-Space-Restricted Aerospace Applications.

Internal Current Return Path for Ground Leakage Current Mitigation in Current Source Inverters (2019)
Journal Article
Lorenzani, E., Migliazza, G., Immovilli, F., Gerada, C., Zhang, H., & Buticchi, G. (2019). Internal Current Return Path for Ground Leakage Current Mitigation in Current Source Inverters. IEEE Access, 7, 96540-96548. https://doi.org/10.1109/access.2019.2929062

This paper analyzes in detail the effect of a simple solution for ground leakage current mitigation applicable to transformerless three-phase current source inverter (CSI). The circuit modification solution is assessed for both traditional CSI topolo... Read More about Internal Current Return Path for Ground Leakage Current Mitigation in Current Source Inverters.

Comparative study on two modular spoke-type PM machines for in-wheel traction applications (2019)
Journal Article
Zhang, H., Hua, W., Gerada, D., Gerada, C., Li, Y., & Zhang, G. (2019). Comparative study on two modular spoke-type PM machines for in-wheel traction applications. IEEE Transactions on Energy Conversion, 34(4), 2137-2147. https://doi.org/10.1109/tec.2019.2927872

This paper focuses on the comparative analysis of modular spoke-type permanent magnet machines with two magnetization modes, which are referred to as M-I and M-II types. The analytical models of the proposed machines are built based on the simple mag... Read More about Comparative study on two modular spoke-type PM machines for in-wheel traction applications.

Layered Al2O3-SiO2 and Al2O3-Ta2O5 thin-film composites for high dielectric strength, deposited by pulsed direct current and radio frequency magnetron sputtering (2019)
Journal Article
Hanby, B. V., Stuart, B. W., Gimeno-Fabra, M., Moffat, J., Gerada, C., & Grant, D. M. (2019). Layered Al2O3-SiO2 and Al2O3-Ta2O5 thin-film composites for high dielectric strength, deposited by pulsed direct current and radio frequency magnetron sputtering. Applied Surface Science, 492, 328-336. https://doi.org/10.1016/j.apsusc.2019.06.202

Multilayer thin films have the potential to act as high dielectric strength insulation for wire and microelectronics. In this study, films consisting of 2, 4 or 8 layers, composed of Al2O3 with SiO2 or Ta2O5, were prepared via pulsed direct current a... Read More about Layered Al2O3-SiO2 and Al2O3-Ta2O5 thin-film composites for high dielectric strength, deposited by pulsed direct current and radio frequency magnetron sputtering.

Information Technologies for Distributed Machine Drives: An Overview (2019)
Presentation / Conference Contribution
Savi, F., Buticchi, G., Gerada, C., Wheeler, P., & Barater, D. (2019, May). Information Technologies for Distributed Machine Drives: An Overview. Presented at 2019 IEEE International Electric Machines & Drives Conference (IEMDC), San Diego, CA, USA

The exponential growth experienced by the semiconductor manufacturing field has led to a large proliferation of devices with large amounts computational power, enabling countless technologies and revolutionizing many fields. Control systems and machi... Read More about Information Technologies for Distributed Machine Drives: An Overview.

Single-Phase Open-Circuit Fault Operation of Bearingless Multi-Sector PM Machines (2019)
Presentation / Conference Contribution
Wen, Z., Valente, G., Formentini, A., Papini, L., Zanchetta, P., & Gerada, C. (2019, May). Single-Phase Open-Circuit Fault Operation of Bearingless Multi-Sector PM Machines. Presented at 2019 IEEE International Electric Machines & Drives Conference (IEMDC), San Diego, CA, USA

This paper investigates the single-phase open-circuit fault of a bearingless multi-sector PM synchronous machine. The mathematical model of the suspension force and torque generation is developed for both healthy and faulty conditions. The model is w... Read More about Single-Phase Open-Circuit Fault Operation of Bearingless Multi-Sector PM Machines.

Dual-Rotor Permanent Magnet Motor for Electric Superbike (2019)
Presentation / Conference Contribution
Golovanov, D., Galassini, A., Flanagan, L., Gerada, D., Xu, Z., & Gerada, C. (2019, May). Dual-Rotor Permanent Magnet Motor for Electric Superbike. Presented at 2019 IEEE International Electric Machines & Drives Conference (IEMDC), San Diego, CA, USA

The demand on high-performance electrical machines has significantly increased for aerospace and transportation industries in recent years. A racing electric motorbike is a suitable platform to validate and prove new concepts and machine topologies b... Read More about Dual-Rotor Permanent Magnet Motor for Electric Superbike.

On the design of partial discharge-free low voltage electrical machines (2019)
Presentation / Conference Contribution
Madonna, V., Giangrande, P., Zhao, W., Zhang, H., Gerada, C., & Galea, M. (2019, May). On the design of partial discharge-free low voltage electrical machines. Presented at 2019 IEEE International Electric Machines & Drives Conference (IEMDC), San Diego, California, USA

Modern electrical machines employed in transportation applications are required to provide high performance in terms of power (and torque) density. At the same time, being these applications safety-critical, a significant level of reliability and/or... Read More about On the design of partial discharge-free low voltage electrical machines.

Thermo-Mechanical Modelling of Bearing Chambers of a High-Speed Starter/Generator (2019)
Presentation / Conference Contribution
Rocca, A. L., Connor, P. H., Xu, Z., Eastwick, C. N., Pickering, S. J., & Gerada, C. (2019, May). Thermo-Mechanical Modelling of Bearing Chambers of a High-Speed Starter/Generator. Presented at 2019 IEEE International Electric Machines & Drives Conference (IEMDC), San Diego, CA, USA

This paper describes the thermal-mechanical characterisation methodology for the bearing chambers of a high-speed (32,000 rpm) electrical starter/generator [1]; presenting a low cost analysis approach and design guideline for future machines. The met... Read More about Thermo-Mechanical Modelling of Bearing Chambers of a High-Speed Starter/Generator.

Torque Ripple Investigation in Squirrel Cage Induction Machines (2019)
Presentation / Conference Contribution
Marfoli, A., Sala, G., Papini, L., Bolognesi, P., & Gerada, C. (2019, May). Torque Ripple Investigation in Squirrel Cage Induction Machines. Presented at 2019 IEEE International Electric Machines & Drives Conference (IEMDC), San Diego, CA, USA

Low torque ripple of electrical machines is an important requirement for many different applications. The causes of torque fluctuations in squirrel cage asynchronous induction motors might be a challenging task due to the complex phenomena raised by... Read More about Torque Ripple Investigation in Squirrel Cage Induction Machines.