All Outputs (25)

Fault-Tolerant Dual Channels Three-Phase PMSM for Aerospace Applications (2024)
Journal Article
Khowja, M. R., Singh, K., Rocca, A. L., Vakil, G., Ramnathan, R., & Gerada, C. (2024). Fault-Tolerant Dual Channels Three-Phase PMSM for Aerospace Applications. IEEE Access, 12, 126845-126857. https://doi.org/10.1109/access.2024.3451705

In safety-critical applications such as aerospace and marine, electrical machines are limited to meet several stringent requirements such as physical, electrical, magnetic and thermal isolation between two three-phase channels, in order to be conside... Read More about Fault-Tolerant Dual Channels Three-Phase PMSM for Aerospace Applications.

Life Characterization of PEEK and Nanofilled Enamel Insulated Wires Under Thermal Ageing (2024)
Journal Article
Khowja, M. R., Vakil, G., Ahmad, S. S., Ramanathan, R., Gerada, C., & Benarous, M. (2024). Life Characterization of PEEK and Nanofilled Enamel Insulated Wires Under Thermal Ageing. IEEE Access, 12, 39470- 39483. https://doi.org/10.1109/access.2024.3374637

This paper characterizes and develops life models for two different wire insulating materials: Poly-ether-ketone (PEEK) and nanofilled enamel (Allotherm wire). The article focuses on predicting the lifespan of PEEK and Allotherm wire insulating mater... Read More about Life Characterization of PEEK and Nanofilled Enamel Insulated Wires Under Thermal Ageing.

Correction: Khowja et al. Integrated Motor Drive: Mass and Volume Optimization of the Motor with an Integrated Filter Inductor. Energies 2021, 14, 4564 (2022)
Journal Article
Khowja, M. R., Vakil, G., Gerada, C., Patel, C., Odhano, S., & Wheeler, P. (in press). Correction: Khowja et al. Integrated Motor Drive: Mass and Volume Optimization of the Motor with an Integrated Filter Inductor. Energies 2021, 14, 4564. Energies, 15(19), 6972. https://doi.org/10.3390/en15196972

Comparative Analysis of Synchronous Reluctance Machine against Conventional Induction Machine for Railway Traction (2022)
Presentation / Conference Contribution
Tom, L., Khowja, M. R., Ramanathan, R., Vakil, G., & Gerada, C. (2022, September). Comparative Analysis of Synchronous Reluctance Machine against Conventional Induction Machine for Railway Traction. Presented at 2022 International Conference on Electrical Machines, ICEM 2022, Valencia, Spain

Electrification in railway industry offers better performing trains with reduced pollution and maximised capacity. SynREL is gaining more interest as a candidate for traction application in place of IM due to its simple and robust structure. Conseque... Read More about Comparative Analysis of Synchronous Reluctance Machine against Conventional Induction Machine for Railway Traction.

Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark (2022)
Presentation / Conference Contribution
Connor, P. H., Khowja, M., La Rocca, A., La Rocca, S., Zou, T., Vakil, G., Walker, A., Gerada, C., & Paciura, K. (2022, September). Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark. Presented at 2022 International Conference on Electrical Machines (ICEM), Valencia, Spain

This paper investigates the potential benefits for the use of synchronous reluctance machines for traction applications. Permanent magnet machines are often used to generate the highest power densities. However, magnet use has drawbacks including tem... Read More about Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark.

Mild hybridisation of turboprop engine with high-power-density integrated electric drives (2022)
Journal Article
Cossart, G., Chen, Y., Yang, T., Khowja, M., La Rocca, A., Nasir, U., Chowdhury, S., Evans, D., Kember, D., Klonowski, T., Arnaud, Y., Apostin, L., Liger, T., Cossart, G., Vakil, G., Gerada, C., Bozhko, S., Detry, S., Diette, C., & Wheeler, P. (2022). Mild hybridisation of turboprop engine with high-power-density integrated electric drives. IEEE Transactions on Transportation Electrification, 8(4), 4148-4162. https://doi.org/10.1109/TTE.2022.3160153

This paper shares with the aerospace community a case study of turboprop mild hybridisation using a recently developed integrated drive system in the University of Nottingham, UK, within the ACHIEVE project under EU H2020 CleanSky 2 program (project... Read More about Mild hybridisation of turboprop engine with high-power-density integrated electric drives.

Mild Hybridization of Turboprop Engine With High-Power-Density Integrated Electric Drives (2022)
Journal Article
Chen, Y., Yang, T., Khowja, M. R., La Rocca, A., Nasir, U., Chowdhury, S., Evans, D., Kember, D., Klonowski, T., Arnaud, Y., Apostin, L., Liger, T., Cossart, G., Vakil, G., Gerada, C., Bozhko, S., Detry, S., Diette, C., & Wheeler, P. (2022). Mild Hybridization of Turboprop Engine With High-Power-Density Integrated Electric Drives. IEEE Transactions on Transportation Electrification, 8(4), 4148-4162. https://doi.org/10.1109/TTE.2022.3160153

This article shares with the aerospace community a case study of turboprop mild hybridization using a recently developed integrated drive system in the University of Nottingham, U.K., within the ACHIEVE project under EU H2020 CleanSky 2 program (proj... Read More about Mild Hybridization of Turboprop Engine With High-Power-Density Integrated Electric Drives.

Review on the Traditional and Integrated Passives: State-of-the-Art Design and Technologies (2021)
Journal Article
Khowja, M. R., Abebe, R., Vakil, G., Walker, A., Patel, C., Gerada, C., Bobba, P. B., & Cascella, G. L. (2021). Review on the Traditional and Integrated Passives: State-of-the-Art Design and Technologies. Energies, 15(1), Article 88. https://doi.org/10.3390/en15010088

With the increased necessity of a high power density and efficient system in aerospace and marine industries, integrated motor drives provide an excellent solution in the modern era. Therefore, a close structural and functional integration of passive... Read More about Review on the Traditional and Integrated Passives: State-of-the-Art Design and Technologies.

Commercial Aircraft Electrification—Current State and Future Scope (2021)
Journal Article
Tom, L., Khowja, M., Vakil, G., & Gerada, C. (2021). Commercial Aircraft Electrification—Current State and Future Scope. Energies, 14(24), Article 8381. https://doi.org/10.3390/en14248381

Electric and hybrid-electric aircraft propulsion are rapidly revolutionising mobility technologies. Air travel has become a major focus point with respect to reducing greenhouse gas emissions. The electrification of aircraft components can bring seve... Read More about Commercial Aircraft Electrification—Current State and Future Scope.

Integrated motor drive: Mass and volume optimization of the motor with an integrated filter inductor (2021)
Journal Article
Khowja, M. R., Vakil, G., Gerada, C., Patel, C., Odhano, S., & Wheeler, P. (2021). Integrated motor drive: Mass and volume optimization of the motor with an integrated filter inductor. Energies, 14(15), Article 4564. https://doi.org/10.3390/en14154564

The present trend of aerospace industries is being shifted towards a “More Electric Aircraft” system which needs to be high power dense. For this purpose, the integration technologies have gained massive interest, providing the benefits of reduced lo... Read More about Integrated motor drive: Mass and volume optimization of the motor with an integrated filter inductor.

Lifetime Estimation of Enameled Wires Under Accelerated Thermal Aging Using Curve Fitting Methods (2021)
Journal Article
Khowja, M. R., Turabee, G., Giangrande, P., Madonna, V., Cosma, G., Vakil, G., Gerada, C., & Galea, M. (2021). Lifetime Estimation of Enameled Wires Under Accelerated Thermal Aging Using Curve Fitting Methods. IEEE Access, 9, 18993-19003. https://doi.org/10.1109/access.2021.3052058

Estimating the lifetime of enameled wires using the conventional/standard test method requires a significant amount of time that can endure up to thousands of testing hours, which could considerably delay the time-to-market of a new product. This pap... Read More about Lifetime Estimation of Enameled Wires Under Accelerated Thermal Aging Using Curve Fitting Methods.

Predicting Insulation Resistance of Enamelled Wire using Neural Network and Curve Fit Methods Under Thermal Aging (2020)
Presentation / Conference Contribution
Turabee, G., Cosma, G., Madonna, V., Giangrande, P., Khowja, M. R., Vakil, G., Gerada, C., & Galea, M. (2020, July). Predicting Insulation Resistance of Enamelled Wire using Neural Network and Curve Fit Methods Under Thermal Aging. Presented at 2020 International Joint Conference on Neural Networks (IJCNN), Glasgow, United Kingdom

© 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.

Thermal Lifetime Evaluation of Electrical Machines Using Neural Network (2020)
Presentation / Conference Contribution
Turabee, G., Khowja, M. R., Madonna, V., Giangrande, P., Vakil, G., Gerada, C., & Galea, M. (2020, June). Thermal Lifetime Evaluation of Electrical Machines Using Neural Network. Presented at 2020 IEEE Transportation Electrification Conference & Expo (ITEC), Chicago, IL, USA

© 2020 IEEE. This paper proposes a surrogate approach which utilises an supervised neural network to significantly shorten the time required for thermal qualification of electrical machines' insulation. The proposed approach is based on a feedforward... Read More about Thermal Lifetime Evaluation of Electrical Machines Using Neural Network.

A Hybrid Computational Tool to Analyze the Performance of Electric Machines with Reduced Content of Permanent Magnet (2020)
Presentation / Conference Contribution
Ram Kumar, R. M., Khowja, M. R., Vakil, G., Gerada, D., Gerada, C., Paciura, K., & Fernandes, B. G. (2020, June). A Hybrid Computational Tool to Analyze the Performance of Electric Machines with Reduced Content of Permanent Magnet. Presented at IEEE Transportation Electrification Conference & Expo (ITEC 2020), Chicago, IL, USA

Electric vehicles (EVs) are equipped with interior permanent magnet (IPM) or permanent magnet assisted synchronous reluctance (PM-SynRel) machines because of their superior performance in field weakening region. The effect of saturation is more prono... Read More about A Hybrid Computational Tool to Analyze the Performance of Electric Machines with Reduced Content of Permanent Magnet.

Thermal Design of an Integrated Inductor for 45kW Aerospace Starter-Generator (2020)
Presentation / Conference Contribution
La Rocca, A., Khowja, M. R., Vakil, G., Gerada, C., Wheeler, P., & Yan, L. (2020, June). Thermal Design of an Integrated Inductor for 45kW Aerospace Starter-Generator. Presented at ITEC 2020 IEEE Transportation Electrification Conference and Expo, Chicago, Illinois, USA (held online)

This paper presents a combined electromagnetic and thermal design of integrated inductor, for the application of a 45kW aircraft starter-generator. The inductor is designed at high current density by using the apporach ofarea product, followed by the... Read More about Thermal Design of an Integrated Inductor for 45kW Aerospace Starter-Generator.

Novel Permanent Magnet Synchronous Motor with Integrated Filter Inductor Using Motor's Inherent Magnetics (2020)
Journal Article
Khowja, M. R., Gerada, C., Vakil, G., Patel, C., Odhano, S. A., Walker, A., & Wheeler, P. (2021). Novel Permanent Magnet Synchronous Motor with Integrated Filter Inductor Using Motor's Inherent Magnetics. IEEE Transactions on Industrial Electronics, 68(7), 5638-5649. https://doi.org/10.1109/tie.2020.3000110

A close functional and structural integration of passive elements is required to improve the power density of motor drives. Such power-dense motor drives are prerequisites in aerospace and automotive applications. This article presents a permanent ma... Read More about Novel Permanent Magnet Synchronous Motor with Integrated Filter Inductor Using Motor's Inherent Magnetics.

The Role of Neural Networks in Predicting the Thermal Life of Electrical Machines (2020)
Journal Article
Turabee, G., Khowja, M. R., Giangrande, P., Madonna, V., Cosma, G., Vakil, G., Gerada, C., & Galea, M. (2020). The Role of Neural Networks in Predicting the Thermal Life of Electrical Machines. IEEE Access, 8, 40283-40297. https://doi.org/10.1109/ACCESS.2020.2975985

© 2013 IEEE. For a continuous mode of operation, insulating material in an electrical machine is subject to constant thermal, electrical, mechanical and environmental stresses where thermal stress is a major cause of gradual insulation deterioration,... Read More about The Role of Neural Networks in Predicting the Thermal Life of Electrical Machines.

Trade-off Study of a High Power Density Starter-Generator for Turboprop Aircraft System (2019)
Presentation / Conference Contribution
Khowja, M. R., Vakil, G., Gerada, C., Yang, T., Bozhko, S., & Wheeler, P. (2019, October). Trade-off Study of a High Power Density Starter-Generator for Turboprop Aircraft System. Presented at 45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019), Lisbon, Portugal

Mechanically-driven actuators, compressors and pumps are being replaced by the aircraft manufacturers that shift the trend towards 'More Electric Aircraft' and hence reducing the mechanical linkages within the aircraft system. This elevates the depen... Read More about Trade-off Study of a High Power Density Starter-Generator for Turboprop Aircraft System.

Analytical Tool to Generate Torque-Speed Characteristics for Surface Mounted PM Machines in Constant Torque and Field Weakening Regions (2019)
Presentation / Conference Contribution
Khowja, M. R., Vakil, G., & Gerada, C. (2019, October). Analytical Tool to Generate Torque-Speed Characteristics for Surface Mounted PM Machines in Constant Torque and Field Weakening Regions. Presented at IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, Lisbon, Portugal

This paper presents an analytical tool to generate torque vs speed characteristics of the surface-mounted permanent magnet machines to minimize the computation time and efforts. The paper also derives an expression of d-axis current in the field weak... Read More about Analytical Tool to Generate Torque-Speed Characteristics for Surface Mounted PM Machines in Constant Torque and Field Weakening Regions.

Decoupled Model for Asymmetrical Dual Three Phase Permanent Magnet Synchronous Machine (2019)
Presentation / Conference Contribution
Chen, Y., Bozhko, S., Fan, L., Yang, T., & Khowja, M. R. (2019, May). Decoupled Model for Asymmetrical Dual Three Phase Permanent Magnet Synchronous Machine. Presented at IEMDC 2019 - International Electric Machines & Drives Conference, San Diego, CA, USA

This paper presents a decoupled modeling method for asymmetrical dual three phase (DTP) permanent magnet synchronous machine (PMSM). Due to the special structure of this machine, traditional decoupled method cannot be applied on it. This paper propos... Read More about Decoupled Model for Asymmetrical Dual Three Phase Permanent Magnet Synchronous Machine.