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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.

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.

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.

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.

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.

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.

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.

Analytical Model for Reluctance and Cage Rotor Bar Magnetic Gear (2020)
Journal Article
Akcay, Y., Cox, T., Costabeber, A., & Sala, G. (2020). Analytical Model for Reluctance and Cage Rotor Bar Magnetic Gear. IEEE Transactions on Industry Applications, 56(3), 2752-2761. https://doi.org/10.1109/TIA.2020.2970861

Magnetic gearboxes are becoming more attractive in gearing areas because of their high torque density and high efficiency. In this article, we proposed a 2-D analytical model in a coaxial magnetic gearbox by considering design aspects that can make t... Read More about Analytical Model for Reluctance and Cage Rotor Bar Magnetic Gear.

Comparative Analysis Between Axial and Coaxial Magnetic Couplings
Conference Proceeding
Akcay, Y., Giangrande, P., Gerada, C., & Galea, M. (2021). Comparative Analysis Between Axial and Coaxial Magnetic Couplings. In The 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020). https://doi.org/10.1049/icp.2021.1147

The adoption of magnetic couplings enables the transmission of mechanical power relying on the magnetic fields interaction rather than a physical mechanical connection. Hence, the contactless speed/torque transmission leads to improvements in terms o... Read More about Comparative Analysis Between Axial and Coaxial Magnetic Couplings.