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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.

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.

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.

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.

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.

Trade-off Analysis of Energy Storage Systems for Helicopter Landing Gear Electromechanical Actuator (2021)
Conference Proceeding
Lukic, M., Giangrande, P., Klumpner, C., & Galea, M. (2021). Trade-off Analysis of Energy Storage Systems for Helicopter Landing Gear Electromechanical Actuator. . https://doi.org/10.1109/ISIE45552.2021.9576403

The aerospace industry is rapidly changing towards more electric aircraft initiative, trying to alleviate pollution problems and obey the authority bodies' strict rules. Not only should aircraft comply with this initiative but also helicopters (i.e.,... Read More about Trade-off Analysis of Energy Storage Systems for Helicopter Landing Gear Electromechanical Actuator.

Magneto-mechanical Design and Development of a Coaxial Magnetic Coupling with Optimization of Torque to Mass Ratio (2021)
Conference Proceeding
Tweedy, O., Akcay, Y., Giangrande, P., & Galea, M. (2021). Magneto-mechanical Design and Development of a Coaxial Magnetic Coupling with Optimization of Torque to Mass Ratio. . https://doi.org/10.1109/IEMDC47953.2021.9449544

This work covers the design and analysis of a coaxial magnetic coupling with the aim to optimize the torque to mass ratio. Magnetic couplings provide several unique benefits over standard mechanical couplings that are made possible via magnetic torqu... Read More about Magneto-mechanical Design and Development of a Coaxial Magnetic Coupling with Optimization of Torque to Mass Ratio.

Improved Propulsion Motor Design for a Twelve Passenger All-Electric Aircraft (2021)
Conference Proceeding
Hebala, A., Nuzzo, S., Connor, P. H., Giangrande, P., Gerada, C., & Galea, M. (2021). Improved Propulsion Motor Design for a Twelve Passenger All-Electric Aircraft. In 2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) (343-348). https://doi.org/10.1109/wemdcd51469.2021.9425667

This paper investigates the design of a 12-seater aircraft electric propulsion motor (ProMo). The design procedures aim to improve the performance of a previously designed motor, while adding further restrictions to the electrical and thermal boundar... Read More about Improved Propulsion Motor Design for a Twelve Passenger All-Electric Aircraft.

Development and Testing of Soft Magnetic Rotor for a Switched Reluctance Motor Built Through Additive Manufacturing Technology (2020)
Conference Proceeding
Gargalis, L., Madonna, V., Giangrande, P., Rocca, R., Ashcroft, I., Hague, R., & Galea, M. (2020). Development and Testing of Soft Magnetic Rotor for a Switched Reluctance Motor Built Through Additive Manufacturing Technology. In 2020 23rd International Conference on Electrical Machines and Systems (ICEMS) (263-268). https://doi.org/10.23919/icems50442.2020.9290893

Additive manufacturing, commonly known as 3D printing, is an emerging technology that is gaining considerable research interest in recent years. In particular, metal printing methodologies might be successfully employed in developing lightweight and... Read More about Development and Testing of Soft Magnetic Rotor for a Switched Reluctance Motor Built Through Additive Manufacturing Technology.

3D Printing as a Technology Enabler for Electrical Machines: Manufacturing and Testing of a Salient Pole Rotor for SRM (2020)
Conference Proceeding
Gargalis, L., Madonna, V., Giangrande, P., Hardy, M., Ashcroft, I., Galea, M., & Hague, R. (2020). 3D Printing as a Technology Enabler for Electrical Machines: Manufacturing and Testing of a Salient Pole Rotor for SRM. In 2020 International Conference on Electrical Machines (ICEM) (12-18). https://doi.org/10.1109/icem49940.2020.9270737

Among the various technology enablers for modern electrical machines, additive manufacturing plays a key role. The advantage of having a precise control of the shape of ferromagnetic structures, whilst achieving good electromagnetic performance, fits... Read More about 3D Printing as a Technology Enabler for Electrical Machines: Manufacturing and Testing of a Salient Pole Rotor for SRM.

On the Capability of Heat Dissipation in Thermally Aged Electrical Machines (2020)
Conference Proceeding
Madonna, V., Giangrande, P., & Galea, M. (2020). On the Capability of Heat Dissipation in Thermally Aged Electrical Machines. In 2020 International Conference on Electrical Machines (ICEM) (954-960). https://doi.org/10.1109/icem49940.2020.9270744

Thermal aging is one of the main causes of progressive deterioration of the insulation system in electrical machines. This because the thermo-physical properties of dielectric materials can undergo severe changes when exposed to high temperature. Acc... Read More about On the Capability of Heat Dissipation in Thermally Aged Electrical Machines.

Novel Parameter Identification Method for Lithium-Ion Batteries Based on Curve Fitting (2020)
Conference Proceeding
Lukic, M., Giangrande, P., Klumpner, C., & Galea, M. (2020). Novel Parameter Identification Method for Lithium-Ion Batteries Based on Curve Fitting. In 2020 IEEE Vehicle Power and Propulsion Conference (VPPC). https://doi.org/10.1109/vppc49601.2020.9330955

This paper describes a new curve-fitting lithium-ion battery parameter identification method for equivalent circuit models. The current pulse/relaxation test is carried out and the corresponding terminal voltage is used for extracting the battery mod... Read More about Novel Parameter Identification Method for Lithium-Ion Batteries Based on Curve Fitting.

Influence of Thermal Aging on the Winding Thermal Conductivity in Low Voltage Electrical Machines (2020)
Conference Proceeding
Madonna, V., Giangrande, P., & Galea, M. (2020). Influence of Thermal Aging on the Winding Thermal Conductivity in Low Voltage Electrical Machines. . https://doi.org/10.23919/icems50442.2020.9291167

It is widely acknowledged that thermal aging can have a detrimental effect on the reliability and lifetime expectancy of electrical machines. Long exposure times to high temperature can deteriorate the dielectric properties of the electrical insulati... Read More about Influence of Thermal Aging on the Winding Thermal Conductivity in Low Voltage Electrical Machines.

PM Halbach Arrays in Motors: Loss Reduction and Performance Improvements (2020)
Conference Proceeding
Hebala, A., Nuzzo, S., Connor, P. H., Giangrande, P., Gerada, C., & Galea, M. (2020). PM Halbach Arrays in Motors: Loss Reduction and Performance Improvements. . https://doi.org/10.23919/ICEMS50442.2020.9291234

© 2020 The Institute of Electrical Engineers of Japan. Halbach array configurations represent a common choice in high-performance electrical machines, since a stronger magnetic field is generated for the same Permanent Magnet (PM) volume. Hence, high... Read More about PM Halbach Arrays in Motors: Loss Reduction and Performance Improvements.

On single-phase operation of three-phase synchronous generators (2020)
Conference Proceeding
Spagnolo, C., Nuzzo, S., Giangrande, P., Galea, M., & Serra, G. (2020). On single-phase operation of three-phase synchronous generators. In ICEMS2020 Web Remote Conference, The 23rd International Conference on Electrical Machines and Systems, November 24 to 27, 2020 (1994-1999). https://doi.org/10.23919/icems50442.2020.9290872

Classical synchronous generators have been used for decades in the field of power generation. The traditional manner of operation of these systems is the balanced, three phase configuration. However, recently there has been an interest in re-configur... Read More about On single-phase operation of three-phase synchronous generators.

A Novel Magnetic Coupling Configuration for Enhancing the Torque Density (2020)
Conference Proceeding
Akcay, Y., Giangrande, P., & Galea, M. (2020). A Novel Magnetic Coupling Configuration for Enhancing the Torque Density. . https://doi.org/10.23919/icems50442.2020.9291073

This paper introduces a novel magnetic coupling (MC) topology, which is able to achieve significant torque density values by adding a limited amount of extra permanent magnets (PMs). Indeed, the proposed MC architecture, namely enhanced magnetic coup... Read More about A Novel Magnetic Coupling Configuration for Enhancing the Torque Density.

Design, Analysis and Dynamic Performance of Radial Magnetic Coupling (2020)
Conference Proceeding
Akcay, Y., Giangrande, P., & Galea, M. (2020). Design, Analysis and Dynamic Performance of Radial Magnetic Coupling. . https://doi.org/10.23919/icems50442.2020.9291124

Contactless torque/speed transmission is gaining an ever-increasing interest in industry and mobile applications, since the mechanical wear-out is avoided resulting in lower maintenance costs. The radial topology is one possible configuration for mag... Read More about Design, Analysis and Dynamic Performance of Radial Magnetic Coupling.

Weibull Distribution and Geometrical Size Factor for Evaluating the Thermal Life of Electrical Machines' Insulation (2020)
Conference Proceeding
Madonna, V., Giangrande, P., & Galea, M. (2020). Weibull Distribution and Geometrical Size Factor for Evaluating the Thermal Life of Electrical Machines' Insulation. In IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society (1114-1119). https://doi.org/10.1109/IECON43393.2020.9255227

© 2020 IEEE. The thermal lifetime assessment of electrical machines' insulation systems is generally performed at the design and prototyping stages. Hence, the insulation system's thermal endurance curve (or temperature index) can be extrapolated, al... Read More about Weibull Distribution and Geometrical Size Factor for Evaluating the Thermal Life of Electrical Machines' Insulation.

Predicting Insulation Resistance of Enamelled Wire using Neural Network and Curve Fit Methods Under Thermal Aging (2020)
Conference Proceeding
Turabee, G., Cosma, G., Madonna, V., Giangrande, P., Khowja, M. R., Vakil, G., …Galea, M. (2020). Predicting Insulation Resistance of Enamelled Wire using Neural Network and Curve Fit Methods Under Thermal Aging. In 2020 International Joint Conference onNeural Networks (IJCNN): 2020 conference proceedings (1-7). https://doi.org/10.1109/IJCNN48605.2020.9207378

© 2020 IEEE. Health monitoring has gained a massive interest in power systems engineering, as it has the advantage to reduce operating costs, improve reliability of power supply and provide a better service to customers. This paper presents surrogate... Read More about Predicting Insulation Resistance of Enamelled Wire using Neural Network and Curve Fit Methods Under Thermal Aging.