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Air Pressure Impact on the Avalanche Size for Turn-to-Turn Insulation of Inverter-Fed Motors (2023)
Journal Article
Naderiallaf, H., Ji, Y., Giangrande, P., & Galea, M. (2024). Air Pressure Impact on the Avalanche Size for Turn-to-Turn Insulation of Inverter-Fed Motors. IEEE Transactions on Dielectrics and Electrical Insulation, 31(1), 85-94. https://doi.org/10.1109/TDEI.2023.3324287

This paper endeavours to illuminate the variations of various streamer inception parameters (SIPs) with respect to air pressure based on Schumann’s streamer inception criterion (SCSIC). The results based on measured PDIV values and using electric fie... Read More about Air Pressure Impact on the Avalanche Size for Turn-to-Turn Insulation of Inverter-Fed Motors.

Temperature Impact on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors: from Ground Level to Cruising Altitude (2023)
Journal Article
Naderiallaf, H., Ji, Y., Giangrande, P., & Galea, M. (2023). Temperature Impact on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors: from Ground Level to Cruising Altitude. IEEE Transactions on Dielectrics and Electrical Insulation, https://doi.org/10.1109/TDEI.2023.3313569

Considering the turn-to-turn insulation as the most susceptible part to the failure of the electrical machine’s insulation system in inverter-fed motors, this paper aims to elucidate the effect of temperature ( T ) on the streamer inception parameter... Read More about Temperature Impact on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors: from Ground Level to Cruising Altitude.

Characterization of PDIV, PDEV and RPDIV in Insulated Wires under Unipolar Repetitive Square Wave Excitations for Inverter-Fed Motors (2023)
Journal Article
Naderiallaf, H., Giangrande, P., & Galea, M. (2023). Characterization of PDIV, PDEV and RPDIV in Insulated Wires under Unipolar Repetitive Square Wave Excitations for Inverter-Fed Motors. IEEE Access, 11, 51047-51063. https://doi.org/10.1109/ACCESS.2023.3279886

The behaviour of partial discharge inception voltage (PDIV), partial discharge extinction voltage (PDEV) and repetitive partial discharge inception voltage (RPDIV) as a function of exposure/poling time under unipolar repetitive square wave excitation... Read More about Characterization of PDIV, PDEV and RPDIV in Insulated Wires under Unipolar Repetitive Square Wave Excitations for Inverter-Fed Motors.

Cosmic Radiation Reliability Analysis for Aircraft Power Electronics (2023)
Journal Article
Dobynde, M., Harikumaran, J., Guo, J., Wheeler, P., Galea, M., & Buticchi, G. (2023). Cosmic Radiation Reliability Analysis for Aircraft Power Electronics. IEEE Transactions on Transportation Electrification, https://doi.org/10.1109/tte.2023.3278319

Cosmic Ray induced failures are a major concern for the electronic system reliability of airborne and space systems. Power system voltages on aerospace platforms are on a steady upward trend. High voltage power converters suffer from Single Event Bur... Read More about Cosmic Radiation Reliability Analysis for Aircraft Power Electronics.

Concept and Demonstration of a Coaxial Magnetic Coupling with Electromagnetic Disconnection for Aircraft Permanent Magnet Generators (2023)
Journal Article
Tweedy, O. R., Akcay, Y., Giangrande, P., & Galea, M. (2023). Concept and Demonstration of a Coaxial Magnetic Coupling with Electromagnetic Disconnection for Aircraft Permanent Magnet Generators. IEEE Transactions on Transportation Electrification, 9(3), 4094-4103. https://doi.org/10.1109/tte.2022.3233538

The application of more electrified systems in aircraft is required to achieve the target of a more sustainable aviation industry. This in turn relies on the development of new electro-mechanical devices to ensure reliability of critical aircraft fun... Read More about Concept and Demonstration of a Coaxial Magnetic Coupling with Electromagnetic Disconnection for Aircraft Permanent Magnet Generators.

Performance Analysis of Complex Vector Discrete Current Controller for High-Speed Permanent Magnet Machines (2022)
Conference Proceeding
Diab, A. M., Aboelhassan, A., Wang, S., Guo, F., Yeoh, S. S., Bozhko, S., …Galea, M. (2022). Performance Analysis of Complex Vector Discrete Current Controller for High-Speed Permanent Magnet Machines. In Proceedings of IEEE 17th Conference on Industrial Electronics and Applications (ICIEA) (590-595). https://doi.org/10.1109/ICIEA54703.2022.10005975

Discrete synchronous reference frame proportional integral Current Controller (CC) delivers superior control performance for high-speed drives due to its ability to accurately compensate for cross-coupling terms. Complete compensation can only be ach... Read More about Performance Analysis of Complex Vector Discrete Current Controller for High-Speed Permanent Magnet Machines.

Glass Fibre Insulated Wire Assessment Under Partial Discharges Activity via Dielectric Dissipation Factor Measurements (2022)
Conference Proceeding
Naderiallaf, H., Giangrande, P., & Galea, M. (2022). Glass Fibre Insulated Wire Assessment Under Partial Discharges Activity via Dielectric Dissipation Factor Measurements. In 2022 9th International Conference on Condition Monitoring and Diagnosis (CMD 2022) (98-102). https://doi.org/10.23919/CMD54214.2022.9991482

This experimental study evaluates the ageing rate associated with partial discharges (PD) activity for a Type-II insulated wire (i.e., Glass fibre), relying on the dielectric dissipation factor (DDF) and capacitance tip-up measurements. The employed... Read More about Glass Fibre Insulated Wire Assessment Under Partial Discharges Activity via Dielectric Dissipation Factor Measurements.

Comparative Stability Analysis of Synchronous Reference Frame Current Controllers Operated at High Fundamental Frequency (2022)
Journal Article
Diab, A. M., Guo, F., Yeoh, S. S., Bozhko, S., Gerada, C., & Galea, M. (2022). Comparative Stability Analysis of Synchronous Reference Frame Current Controllers Operated at High Fundamental Frequency. IEEE Transactions on Transportation Electrification, https://doi.org/10.1109/TTE.2022.3208825

Synchronous reference frame (SRF) proportional-integral (PI) current controller (CC) is the most well-established solution for current regulation in AC machine drives and grid-connected voltage source converters. The design of high dynamic performanc... Read More about Comparative Stability Analysis of Synchronous Reference Frame Current Controllers Operated at High Fundamental Frequency.

On the Fault Tolerance and PM Demagnetisation of a High-Performance Aircraft Propulsion Motor (2022)
Conference Proceeding
Hebala, A., Nuzzo, S., Connor, P. H., Gerada, C., & Galea, M. (2022). On the Fault Tolerance and PM Demagnetisation of a High-Performance Aircraft Propulsion Motor. . https://doi.org/10.1109/icem51905.2022.9910866

In this paper, a study of the fault-tolerance and demagnetisation of a high-performance aircraft propulsion motor is investigated. The motor is proposed with either three or four sets of three-phase windings, while maintaining the same magnetic and t... Read More about On the Fault Tolerance and PM Demagnetisation of a High-Performance Aircraft Propulsion Motor.

Electromechanical Analysis of Low Voltage Faults in a Magnetically Coupled Synchronous Generator Set (2022)
Conference Proceeding
Tweedy, O. R., Akcay, Y., Giangrande, P., Galea, M., & Garvey, S. D. (2022). Electromechanical Analysis of Low Voltage Faults in a Magnetically Coupled Synchronous Generator Set. In 2022 International Conference on Electrical Machines (ICEM 2022) (143-149). https://doi.org/10.1109/icem51905.2022.9910689

This paper investigates the magneto-mechanical performance of a magnetically coupled, engine driven synchronous generator set exposed to a severe low voltage grid fault. A multi-physics model of a generator, coaxial magnetic coupling and diesel engin... Read More about Electromechanical Analysis of Low Voltage Faults in a Magnetically Coupled Synchronous Generator Set.

Investigating the Effect of Waveform Characteristics on PDEV, PDIV and RPDIV for Glass Fibre Insulated Wire (2022)
Conference Proceeding
Naderiallaf, H., Giangrande, P., & Galea, M. (2022). Investigating the Effect of Waveform Characteristics on PDEV, PDIV and RPDIV for Glass Fibre Insulated Wire. In 2022 International Conference on Electrical Machines (ICEM 2022) (1327-1333). https://doi.org/10.1109/icem51905.2022.9910752

The trends of partial discharge extinction voltage (PDEV), partial discharge inception voltage (PDIV) and repetitive partial discharge inception voltage (RPDIV) as a function of duty cycle, frequency, and rise time are experimentally investigated in... Read More about Investigating the Effect of Waveform Characteristics on PDEV, PDIV and RPDIV for Glass Fibre Insulated Wire.

Analysis and Mitigation of AC Losses in High Performance Propulsion Motors (2022)
Journal Article
Hebala, A., Nuzzo, S., Connor, P. H., Volpe, G., Gerada, C., & Galea, M. (2022). Analysis and Mitigation of AC Losses in High Performance Propulsion Motors. Machines, 10(9), Article 780. https://doi.org/10.3390/machines10090780

In this paper, the AC copper losses in classical random windings are investigated and mitigated using several techniques across a range of permanent magnet synchronous motor designs. At high operating frequencies, AC copper losses can represent a sub... Read More about Analysis and Mitigation of AC Losses in High Performance Propulsion Motors.

Experimental considerations on the possible impact of space charge accumulation on partial discharges activity for wire insulations (2022)
Conference Proceeding
Naderiallaf, H., Giangrande, P., & Galea, M. (2022). Experimental considerations on the possible impact of space charge accumulation on partial discharges activity for wire insulations. In 2022 IEEE 4th International Conference on Dielectrics (ICD 2022) (82-85). https://doi.org/10.1109/icd53806.2022.9863223

The impact of space charge accumulation caused by unipolar square waveform excitation on partial discharge inception voltage (PDIV) and partial discharge extinction voltage (PDEV) for one Type-II insulated wire, i.e., Glass fibre and one Type-I insul... Read More about Experimental considerations on the possible impact of space charge accumulation on partial discharges activity for wire insulations.

Design and Development of an Axial Magnetic Coupling for Reliable Aircraft Power Generation (2022)
Conference Proceeding
Akcay, Y., Tweedy, O., Giangrande, P., & Galea, M. (2022). Design and Development of an Axial Magnetic Coupling for Reliable Aircraft Power Generation. In 2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM 2022) (877-882). https://doi.org/10.1109/speedam53979.2022.9842202

This paper introduces an axial magnetic coupling (AMC) that can be employed between the engine and the constant speed drive unit (CSDU) or generator in most commercial aircrafts to transfer torque/speed safely and ensure overload torque protection ca... Read More about Design and Development of an Axial Magnetic Coupling for Reliable Aircraft Power Generation.

A Contribution to Thermal Ageing Assessment of Glass Fiber Insulated Wire Based on Partial Discharges Activity (2022)
Journal Article
Naderiallaf, H., Giangrande, P., & Galea, M. (2022). A Contribution to Thermal Ageing Assessment of Glass Fiber Insulated Wire Based on Partial Discharges Activity. IEEE Access, 10, 41186-41200. https://doi.org/10.1109/ACCESS.2022.3167698

This paper aims to evaluate a Type-II insulated wire (i.e., Glass fibre insulated wire) as a function of thermal ageing time based on partial discharges (PD) activity. Partial discharge inception voltage (PDIV), partial discharge extinction voltage (... Read More about A Contribution to Thermal Ageing Assessment of Glass Fiber Insulated Wire Based on Partial Discharges Activity.

Design and Analysis of a Double Coaxial Magnetic Coupling to Improve Torque Density (2021)
Conference Proceeding
Akcay, Y., Tweedy, O., Giangrande, P., & Galea, M. (2021). Design and Analysis of a Double Coaxial Magnetic Coupling to Improve Torque Density. In IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society 13-16 Oct. 2021. https://doi.org/10.1109/iecon48115.2021.9589169

Coaxial magnetic couplings are an attractive alternative to traditional mechanical machine couplings which bring several desirable advantages but are limited by their relatively low torque density and torque to mass ratio. The optimum magnetic design... Read More about Design and Analysis of a Double Coaxial Magnetic Coupling to Improve Torque Density.

Technical Review of Dual Inverter Topologies for More Electric Aircraft Applications (2021)
Journal Article
Huang, Z., Yang, T., Giangrande, P., Galea, M., & Wheeler, P. (2021). Technical Review of Dual Inverter Topologies for More Electric Aircraft Applications. IEEE Transactions on Transportation Electrification, https://doi.org/10.1109/tte.2021.3113606

Electric drives are an essential part of more electric aircraft (MEA) applications with ever-growing demands for high power density, high performance, and high fault-tolerant capability. High-speed motor drives can fulfil those needs, but their speed... Read More about Technical Review of Dual Inverter Topologies for More Electric Aircraft Applications.

Fault Tolerant Control Strategy Based On Model Predictive Control And Unscented Kalman Filter For Permanent Magnet Synchronous Motor (2021)
Conference Proceeding
Aboelhassan, A., El Sayed, W., Hebala, A., Galea, M., & Bozhko, S. (2021). Fault Tolerant Control Strategy Based On Model Predictive Control And Unscented Kalman Filter For Permanent Magnet Synchronous Motor. In 2021 16th IEEE Conference on Industrial Electronics and Applications (ICIEA) (153-159). https://doi.org/10.1109/ICIEA51954.2021.9516257

Permanent Magnet Synchronous Motors (PMSMs) are now extensively used in many critical applications. There is an increasing need for the motor and control system to have fault tolerant capabilities. This paper presents a fault tolerant control strateg... Read More about Fault Tolerant Control Strategy Based On Model Predictive Control And Unscented Kalman Filter For Permanent Magnet Synchronous Motor.

Fast and Accurate 2D Analytical Subdomain Method for Coaxial Magnetic Coupling Analysis (2021)
Journal Article
Akcay, Y., Giangrande, P., Tweedy, O., & Galea, M. (2021). Fast and Accurate 2D Analytical Subdomain Method for Coaxial Magnetic Coupling Analysis. Energies, 14(15), Article 4656. https://doi.org/10.3390/en14154656

Magnetic couplings (MCs) enable contactless speed/torque transmission via interactions between the magnetic fields of permanent magnets (PMs) rather than a physical mechanical connection. The contactless transmission of mechanical power leads to impr... Read More about Fast and Accurate 2D Analytical Subdomain Method for Coaxial Magnetic Coupling Analysis.