All Outputs (42)

Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor (2021)
Presentation / Conference Contribution
Raqib, A., Jahanger, H., Sumner, M., Cox, T., Klumpner, C., Agha, I., Kenney, R., Aguilar, F., & Lonsdale, P. (2020, December). Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor. Presented at 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020), Online Conference

Electrolytic capacitors continue to be used for the DC-link in motor drive systems due to their high specific capacitance. The degradation of electrolytic capacitors can lead to increased equivalent series resistances (ESR) and reduction in capacitan... Read More about Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor.

A PM-Assisted Synchronous Reluctance Motor with Two Slot-Pitch Winding (2020)
Presentation / Conference Contribution
Zhu, S., Cox, T., Xu, Z., & Gerada, C. (2020, November). A PM-Assisted Synchronous Reluctance Motor with Two Slot-Pitch Winding. Presented at 2020 23rd International Conference on Electrical Machines and Systems (ICEMS), Hamamatsu, Japan

This paper presents a novel electric motor solution to tackle the increasing demand on the traction motor for electric vehicles. The proposed electric motor has a 24 slots 10 poles fractional slot two-slot pitch winding and a PM-assisted synchronous... Read More about A PM-Assisted Synchronous Reluctance Motor with Two Slot-Pitch Winding.

Analysis of a Five-Phase PM Vernier Machine Topology with Two-Slot Pitch Winding (2020)
Presentation / Conference Contribution
Zhu, S., Cox, T., Xu, Z., & Gerada, C. (2020, October). Analysis of a Five-Phase PM Vernier Machine Topology with Two-Slot Pitch Winding. Presented at 2020 IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI, USA

This paper presents a five-phase permanent magnet (PM) vernier machine topology equipped with a two-slot pitch winding. The two-slot pitch winding provides a trade-off between fractional slots concentrated winding (FSCW) and integrated slot distribut... Read More about Analysis of a Five-Phase PM Vernier Machine Topology with Two-Slot Pitch Winding.

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.

Zero-Sequence Voltage Elimination for Dual-Fed Common DC-Link Open-End Winding PMSM High-Speed Starter-Generator - Part I: Modulation (2019)
Journal Article
Rovere, L., Formentini, A., Calzo, G. L., Zanchetta, P., & Cox, T. (2019). Zero-Sequence Voltage Elimination for Dual-Fed Common DC-Link Open-End Winding PMSM High-Speed Starter-Generator - Part I: Modulation. IEEE Transactions on Industry Applications, 55(6), 7804-7812. https://doi.org/10.1109/TIA.2019.2907073

© 1972-2012 IEEE. In this paper, a dual-fed (DF) common dc-link topology open-end winding permanent magnet synchronous motor for aircraft high-speed starter-generator application is considered. While on one hand the common dc bus configuration signif... Read More about Zero-Sequence Voltage Elimination for Dual-Fed Common DC-Link Open-End Winding PMSM High-Speed Starter-Generator - Part I: Modulation.

Zero-sequence voltage elimination for dual fed common dc-link open-end winding PMSM high speed starter-generator, part II: dead time hysteresis control of zero sequence current (2019)
Journal Article
Rovere, L., Formentini, A., Lo Calzo, G., Zanchetta, P., & Cox, T. (2019). Zero-sequence voltage elimination for dual fed common dc-link open-end winding PMSM high speed starter-generator, part II: dead time hysteresis control of zero sequence current. IEEE Transactions on Industry Applications, 55(6), 7813-7821. https://doi.org/10.1109/tia.2019.2907095

In a common dc link dual-fed Open-End Winding Permanent Magnet Synchronous Motor (OEW-PMSM) topology it is well known how the additional flow of a Zero-Sequence Current (ZSC) is permitted. The low Zero-Sequence Impedance (ZSI) characteristic of high... Read More about Zero-sequence voltage elimination for dual fed common dc-link open-end winding PMSM high speed starter-generator, part II: dead time hysteresis control of zero sequence current.

Design Considerations of Fault-Tolerant Electromechanical Actuator Systems for More Electric Aircraft (MEA) (2018)
Presentation / Conference Contribution
Zhu, S., Cox, T., Xu, Z., Gerada, C., & Li, C. (2018, September). Design Considerations of Fault-Tolerant Electromechanical Actuator Systems for More Electric Aircraft (MEA). Presented at IEEE Energy Conversion Congress and Exposition ( ECCE 2018), Portland, OR

This paper studies the concerns such as architecture and reliability in the deployment of electromechanical actuator (EMA) in the actuation system for more electric aircraft (MEA). First, the reliability of the actuation system architecture such as c... Read More about Design Considerations of Fault-Tolerant Electromechanical Actuator Systems for More Electric Aircraft (MEA).

Consideration on Eddy Current Reduction Techniques for Solid Materials Used in Unconventional Magnetic Circuits (2018)
Journal Article
Mohammed, A. M., Galea, M., Cox, T., & Gerada, C. (2019). Consideration on Eddy Current Reduction Techniques for Solid Materials Used in Unconventional Magnetic Circuits. IEEE Transactions on Industrial Electronics, 66(6), 4870-4879. https://doi.org/10.1109/TIE.2018.2875641

The use of solid materials in tubular, linear machines has significant manufacturing benefits, as this removes the need for an axially laminated stator. However, this comes at the cost of extra eddy current losses. In this paper, a detailed analysis... Read More about Consideration on Eddy Current Reduction Techniques for Solid Materials Used in Unconventional Magnetic Circuits.

Non-Intrusive Online Stator Temperature Estimation for Open-End Winding PMSM (2018)
Presentation / Conference Contribution
Hunter, N., Cox, T., Zanchetta, P., Odhano, S. A., & Rovere, L. (2018, September). Non-Intrusive Online Stator Temperature Estimation for Open-End Winding PMSM. Presented at 2018 IEEE Energy Conversion Congress and Exposition (ECCE), Portland, OR

This paper proposes a new method for online identification of stator winding temperature for an open-end winding (OEW) permanent magnet synchronous motor (PMSM). The method exploits the zero sequence current (ZSC) due to the third harmonic back elect... Read More about Non-Intrusive Online Stator Temperature Estimation for Open-End Winding PMSM.

Torque Quality Improvement of an Open-End Winding PMSM (2018)
Presentation / Conference Contribution
Hunter, N., Cox, T., Zanchetta, P., Odhano, S. A., & Rovere, L. (2018, September). Torque Quality Improvement of an Open-End Winding PMSM. Presented at 2018 IEEE Energy Conversion Congress and Exposition (ECCE), Portland, OR

This paper proposes a new closed-loop control strategy which improves the quality of the torque output of an open-end winding (OEW) permanent magnet synchronous motor (PMSM) with common DC bus. Such a configuration provides a path for the zero sequen... Read More about Torque Quality Improvement of an Open-End Winding PMSM.

Mass Production Costing of Induction Machines for Automotive Applications (2018)
Presentation / Conference Contribution
Hundak, V., Cox, T., Vakil, G., & Gerada, C. (2018, June). Mass Production Costing of Induction Machines for Automotive Applications. Presented at 2018 IEEE Transportation and Electrification Conference and Expo (ITEC), Long Beach, CA, USA

Cost is one of the key parameters of electric machines designed for automotive applications. In order to keep manufacturing cost low, it is desirable to estimate the manufacturing cost of the machine in the early stages of the design process. For thi... Read More about Mass Production Costing of Induction Machines for Automotive Applications.

Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle (2018)
Presentation / Conference Contribution
Talha, A., Vakil, G., Cox, T., & Gerada, C. (2018, April). Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle. Presented at PEMD 2018 - 9th International Conference on Power Electronics, Machines and Drives

A switched reluctance machine (SRM) is very robust and capable to perform well under harsh conditions. It is simple in construction and avoids the use of magnets so it is cheap to manufacture. The powertrain of a hybrid vehicle presents challenging c... Read More about Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle.

Power quality improvement of synchronous generators using an active power filter (2018)
Journal Article
Abu-Jalala, A.-H., Cox, T., Gerada, C., Rashed, M., Hamiti, T., & Brown, N. (2018). Power quality improvement of synchronous generators using an active power filter. IEEE Transactions on Industry Applications, 54(5), 4080-4090. https://doi.org/10.1109/TIA.2018.2828789

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 Power quality improvement of synchronous generators using an active power filter.

A novel 24-slots14-poles fractional-slot concentrated winding topology with low space harmonics for electrical machines (2018)
Presentation / Conference Contribution
Zhu, S., Cox, T., Xu, Z., & Gerada, C. (2018, April). A novel 24-slots14-poles fractional-slot concentrated winding topology with low space harmonics for electrical machines. Presented at PEMD 2018 - 9th International Conference on Power Electronics, Machines and Drives

This paper proposes a novel winding layout for the machines with fractional-slot concentrated windings (FSCW) using a stator shifting concept and non-overlapping windings, with which all the non-working harmonics will be completely cancelled or signi... Read More about A novel 24-slots14-poles fractional-slot concentrated winding topology with low space harmonics for electrical machines.

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.

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.

Improving magnetic gear overload torque with cage rotor bars (2017)
Presentation / Conference Contribution
Ackay, Y., Cox, T., & Costabeber, A. (2017, August). Improving magnetic gear overload torque with cage rotor bars. Presented at 2017 20th International Conference on Electrical Machines and Systems (ICEMS), Sydney, NSW, Australia

This paper introduces a coaxial magnetic gearbox with a new high-speed rotor configuration. The proposed configuration optimizes magnet volume and employs cage rotor bars in the high-speed rotor. The resulting proposed gear improves torque performanc... Read More about Improving magnetic gear overload torque with cage rotor bars.

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.

IGBT-SiC dual fed open end winding PMSM drive (2017)
Presentation / Conference Contribution
Rovere, L., Formentini, A., Lo Calzo, G., Cox, T., & Zanchetta, P. IGBT-SiC dual fed open end winding PMSM drive. Presented at IEEE International Electric Machines and Drives Conference (IEMDC 2017)

This paper proposes a dual fed common dc link inverter Open End Winding-Permanent Magnet Synchronous Motor (OEW-PMSM) Drive. In order to increase the system efficiency a dual technology converter is used, with one inverter composed of standard IGBT d... Read More about IGBT-SiC dual fed open end winding PMSM drive.

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.