A new method for determining the magnetic properties of solid materials employed in unconventional magnetic circuits

Mohammed, A.; Cox, Tom; Galea, Michael; Gerada, C.

doi:10.1109/TIE.2016.2587859

Position control study of a bearingless multi-sector permanent magnet machine (2017)
Presentation / Conference Contribution
Valente, G., Formentini, A., Papini, L., Zanchetta, P., & Gerada, C. (2017, October). Position control study of a bearingless multi-sector permanent magnet machine. Presented at IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, Beijing, China

Bearingless motors combine in the same structure the characteristics of conventional motors and magnetic bearings. Traditional bearingless machines rely on two independent sets of winding for suspension force and torque production, respectively. The... Read More about Position control study of a bearingless multi-sector permanent magnet machine.

A semi-flooded cooling for a high speed machine: Concept, design and practice of an oil sleeve (2017)
Presentation / Conference Contribution
Xu, Z., La Rocca, A., Arumugam, P., Pickering, S. J., Gerada, C., Bozhko, S., Gerada, D., & Zhang, H. (2017, October). A semi-flooded cooling for a high speed machine: Concept, design and practice of an oil sleeve. Presented at IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, Beijing, China

This paper proposes a semi-flooded cooling concept for a high speed machine design. The electrical machine considered is for an aircraft starter-generator system where power density and efficiency are crucial. In order to achieve the high power densi... Read More about A semi-flooded cooling for a high speed machine: Concept, design and practice of an oil sleeve.

Radial force control of multi-sector permanent magnet machines for vibration suppression (2017)
Journal Article
Valente, G., Papini, L., Formentini, A., Gerada, C., & Zanchetta, P. (2018). Radial force control of multi-sector permanent magnet machines for vibration suppression. IEEE Transactions on Industrial Electronics, 65(7), 5395-5405. https://doi.org/10.1109/TIE.2017.2780039

Radial force control in electrical machines has been widely investigated for a variety of bearingless machines, as well as for the conventional structures featuring mechanical bearings. This paper takes advantage of the spatial distribution of the wi... Read More about Radial force control of multi-sector permanent magnet machines for vibration suppression.

Multi-domain optimization of high power-density PM electrical machines for system architecture selection (2017)
Journal Article
Golovanov, D., Papini, L., Gerada, D., Xu, Z., & Gerada, C. (2018). Multi-domain optimization of high power-density PM electrical machines for system architecture selection. IEEE Transactions on Industrial Electronics, 65(7), 5302-5312. https://doi.org/10.1109/TIE.2017.2772188

The power density of electrical machines for transport applications has become a critical aspect and target of optimization. This paper looks at the development of an intelligent, rapid, flexible, and multidomain tool to aid for system-level optimiza... Read More about Multi-domain optimization of high power-density PM electrical machines for system architecture selection.

A Novel Space Vector Modulation Technique For Three Level NPC Converters Within Aircraft Starter Generator Systems (2017)
Presentation / Conference Contribution
Li, C., Lo Calzo, G., Bozhko, S., Gerada, C., Wheeler, P., & Yang, T. (2017, November). A Novel Space Vector Modulation Technique For Three Level NPC Converters Within Aircraft Starter Generator Systems. Presented at 4th International Symposium on More Electric Aircraft (MEA 2017), Beijing, China

The neutral point voltage balancing issue for three level Neutral point clamped (NPC) converter has been extensively investigated recently. Different solutions to balance the neutral point have been proposed. However the proposed solutions so far eit... Read More about A Novel Space Vector Modulation Technique For Three Level NPC Converters Within Aircraft Starter Generator Systems.

Performance improvement of simplified synchronous generators using an active power filter (2017)
Presentation / Conference Contribution
Abu-Jalala, A.-H., Cox, T., Gerada, C., & Rashed, M. Performance improvement of simplified synchronous generators using an active power filter. Presented at Energy Conversion Congress and Exposition (ECCE) 2017

Active power filters (APF) are used to improve power quality and are commonly connected in parallel with the load at the point of common coupling (PCC). They are used to compensate for harmonics from nonlinear loads, for reactive power compensation a... Read More about Performance improvement of simplified synchronous generators using an active power filter.

A system level comparison of drive topologies for high speed electrical machines (2017)
Presentation / Conference Contribution
Savi, F., Barater, D., Di Nardo, M., Degano, M., & Gerada, C. A system level comparison of drive topologies for high speed electrical machines. Presented at 43rd Annual Conference of the IEEE Industrial Electronics Society (IECON 2017)

This paper presents a comprehensive comparative study among five different converter topologies all designed to drive a 8.5kW-120krpm surface permanent magnet synchronous machine. The study aims at comparing the considered systems in terms of convert... Read More about A system level comparison of drive topologies for high speed electrical machines.

Speed control with load sharing capabilities for multi-three phase synchronous motors (2017)
Presentation / Conference Contribution
Galassini, A., Costabeber, A., Gerada, C., Tessarolo, A., & Menis, R. (2017, October). Speed control with load sharing capabilities for multi-three phase synchronous motors. Presented at IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, Beijing, China

The on-going electrification transportation system revolution has already started and the continuous evolution of power electronics allows new and more reliable system layouts and control strategies to be investigated. Mainly, this revolution is driv... Read More about Speed control with load sharing capabilities for multi-three phase synchronous motors.

A two degrees of freedom system for wheel traction applications (2017)
Journal Article
Roggia, S., Cupertino, F., Gerada, C., & Galea, M. (2018). A two degrees of freedom system for wheel traction applications. IEEE Transactions on Industrial Electronics, 65(6), 4483-4491. https://doi.org/10.1109/TIE.2017.2767554

In this paper, the use of conical induction machines is proposed for an in-wheel traction application. Such machines offer a rotational movement combined with a translational motion of the rotor. The horizontal movement is essential when active engag... Read More about A two degrees of freedom system for wheel traction applications.

Axial eccentric SynRel and SPM motors analytical models validation using 3D finite element (2017)
Presentation / Conference Contribution
Mahmoud, H., Al-Timimy, A., Degano, M., Di Nardo, M., Bianchi, N., & Gerada, C. (2017, August). Axial eccentric SynRel and SPM motors analytical models validation using 3D finite element. Presented at SDEMPED 2017 - IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, Tinos, Greece

This paper deals with the uniform and non-uniform axial eccentricity analyses of the surface mounted permanent magnet and synchronous reluctance machines. The analyses are carried out using an analytical model for each considered machine. Being the a... Read More about Axial eccentric SynRel and SPM motors analytical models validation using 3D finite element.

Comparative study and optimal design of alternative PM configuration transverse flux linear machine (2017)
Presentation / Conference Contribution
Zhu, S., Cox, T., Gerada, C., & Xu, Z. Comparative study and optimal design of alternative PM configuration transverse flux linear machine. Presented at 20th International Conference on Electrical Machines and Systems (ICEMS)

This paper presents the comparative study and optimal design of a transverse flux linear machine with different PM configurations, viz. surface-mounted and consequent-pole, in which the consequent-pole version is firstly proposed. Firstly, the effect... Read More about Comparative study and optimal design of alternative PM configuration transverse flux linear machine.

Distributed speed control for multi-three phase electrical motors with improved power sharing capability (2017)
Presentation / Conference Contribution
Galassini, A., Costabeber, A., Gerada, C., & Tessarolo, A. Distributed speed control for multi-three phase electrical motors with improved power sharing capability. Presented at 2017 IEEE Energy Conversion Congress and Exposition (ECCE)

This paper proposes a distributed speed control with improved power sharing capability for multi-three phase synchronous machines. This control technique allows the speed to be precisely regulated during power sharing transients among different drive... Read More about Distributed speed control for multi-three phase electrical motors with improved power sharing capability.

Comparative study of novel tubular flux-reversal transverse flux permanent magnet linear machine (2017)
Presentation / Conference Contribution
Zhu, S., Cox, T., & Gerada, C. Comparative study of novel tubular flux-reversal transverse flux permanent magnet linear machine. Presented at 2017 IEEE Energy Conversion Congress and Exposition (ECCE)

This paper presents a novel tubular flux-reversal transverse flux permanent magnet linear machine (FR-TFPMLM), in which both magnet and armature winding are located at the short primary side whereas the secondary side is composed of only magnetic ste... Read More about Comparative study of novel tubular flux-reversal transverse flux permanent magnet linear machine.

Design optimization of a high-speed synchronous reluctance machine (2017)
Journal Article
Di Nardo, M., Lo Calzo, G., Galea, M., & Gerada, C. (2018). Design optimization of a high-speed synchronous reluctance machine. IEEE Transactions on Industry Applications, 54(1), 233-243. https://doi.org/10.1109/TIA.2017.2758759

Synchronous reluctance machines, including the per¬manent magnet assisted variants are competitive motor topologies if the application requires high efficiency and a cost effective solution with a high flux weakening capability. However, increas¬ing... Read More about Design optimization of a high-speed synchronous reluctance machine.

Analysis, modelling and design considerations for the excitation systems of synchronous generators (2017)
Journal Article
Nuzzo, S., Galea, M., Gerada, C., & Brown, N. (2018). Analysis, modelling and design considerations for the excitation systems of synchronous generators. IEEE Transactions on Industrial Electronics, 65(4), 2996-3007. https://doi.org/10.1109/TIE.2017.2756592

The traditional generating set is usually comprised of a classical, wound-field, salient-pole or cylindrical rotor synchronous generator, excited by a separate smaller machine, via a rotating, uncontrolled diode rectifier. The effects of the commutat... Read More about Analysis, modelling and design considerations for the excitation systems of synchronous generators.

The Third Workshop on Electrical Machines Design, Control, and Diagnosis: continuing the success, ensuring the quality (2017)
Journal Article
Galea, M., & Gerada, C. (2017). The Third Workshop on Electrical Machines Design, Control, and Diagnosis: continuing the success, ensuring the quality. IEEE Industrial Electronics Magazine, 11(3), 54-55. https://doi.org/10.1109/MIE.2017.2726241

Use of optical fibres for multi-parameter monitoringin electrical AC machines (2017)
Presentation / Conference Contribution
Hind, D. M., Gerada, C., Galea, M., Borg Bartalo, J., Fabian, M., Sun, T., & Grattan, K. T. (2017, August). Use of optical fibres for multi-parameter monitoringin electrical AC machines. Presented at IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED 2017)

This paper describes a new approach to multi-parameter monitoring for electrical AC machines. It is demonstrated that speed, torque and temperature can be measured using optical fibres incorporating sensors in the form of fibre Bragg gratings (FBGs)... Read More about Use of optical fibres for multi-parameter monitoringin electrical AC machines.

Thermal investigation on HSPM with new alloy sleeve (2017)
Presentation / Conference Contribution
Zhang, X., Li, W., Zhang, H., Gerada, C., Gerada, D., & Li, J. (2017, August). Thermal investigation on HSPM with new alloy sleeve. Presented at 2017 20th International Conference on Electrical Machines and Systems, ICEMS 2017, Sydney, NSW, Australia

This paper presents a developed copper-iron alloy which made as the rotor sleeve in a high speed permanent magnetic machine (HSPMG), whist investigating its benefits in improve machine thermal performance. The features of the new alloy is experimenta... Read More about Thermal investigation on HSPM with new alloy sleeve.

Holistic electrical machine optimization for system integration (2017)
Presentation / Conference Contribution
Gerada, D., Golovanov, D., Xu, Z., Papini, L., Degano, M., Zhang, H., & Gerada, C. (2017, June). Holistic electrical machine optimization for system integration. Presented at 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC - ECCE Asia) 2017, Kaohsiung, Taiwan

The power density of electrical machines required for transport applications has become a critical aspect and target of optimization. This paper looks at the development aspects of a multi-domain tool to aid for system-level optimization of electrica... Read More about Holistic electrical machine optimization for system integration.

A new method for determining the magnetic properties of solid materials employed in unconventional magnetic circuits (2017)
Journal Article
Mohammed, A., Cox, T., Galea, M., & Gerada, C. (in press). A new method for determining the magnetic properties of solid materials employed in unconventional magnetic circuits. IEEE Transactions on Industrial Electronics, https://doi.org/10.1109/TIE.2016.2587859

The mechanical and thermal properties of common, solid (non-laminated) ferromagnetic materials are widely available, but the electro-magnetic characteristics of such solid materials are often undefined. Existing characterization procedures such as th... Read More about A new method for determining the magnetic properties of solid materials employed in unconventional magnetic circuits.

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