Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor (2021)
Conference Proceeding
Raqib, A., Jahanger, H., Sumner, M., Cox, T., Klumpner, C., Agha, I., …Lonsdale, P. (2021). Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor. In 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020) (621 – 626). https://doi.org/10.1049/icp.2021.1169

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)
Conference Proceeding
Zhu, S., Cox, T., Xu, Z., & Gerada, C. (2020). A PM-Assisted Synchronous Reluctance Motor with Two Slot-Pitch Winding. . https://doi.org/10.23919/icems50442.2020.9291090

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)
Conference Proceeding
Zhu, S., Cox, T., Xu, Z., & Gerada, C. (2020). Analysis of a Five-Phase PM Vernier Machine Topology with Two-Slot Pitch Winding. . https://doi.org/10.1109/ecce44975.2020.9235833

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)
Conference Proceeding
Zhu, S., Cox, T., Xu, Z., Gerada, C., & Li, C. (2018). Design Considerations of Fault-Tolerant Electromechanical Actuator Systems for More Electric Aircraft (MEA). https://doi.org/10.1109/ECCE.2018.8557426

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)
Conference Proceeding
Hunter, N., Cox, T., Zanchetta, P., Odhano, S. A., & Rovere, L. (2018). Non-Intrusive Online Stator Temperature Estimation for Open-End Winding PMSM. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE) (6845-6851). https://doi.org/10.1109/ECCE.2018.8558475

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)
Conference Proceeding
Hunter, N., Cox, T., Zanchetta, P., Odhano, S. A., & Rovere, L. (2018). Torque Quality Improvement of an Open-End Winding PMSM. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE) (4254-4261). https://doi.org/10.1109/ECCE.2018.8558051

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.