Dr GAURANG VAKIL's Outputs (81)

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.

Rotor UMP characteristics and vibration properties in synchronous generator due to 3D static air-gap eccentricity faults (2020)
Journal Article
He, Y. L., Sun, Y. X., Xu, M. X., Wang, X. L., Wu, Y. C., Vakil, G., Gerada, D., & Gerada, C. (2020). Rotor UMP characteristics and vibration properties in synchronous generator due to 3D static air-gap eccentricity faults. IET Electric Power Applications, 14(6), 961-971. https://doi.org/10.1049/iet-epa.2019.0844

In this article, the qualitative theoretical derivation, together with finite element analysis and experimental studies are presented to investigate the unbalanced magnetic pull (UMP) as well as the rotor vibration characteristics. Differently from p... Read More about Rotor UMP characteristics and vibration properties in synchronous generator due to 3D static air-gap eccentricity faults.

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.

Electric drive systems with long feeder cables (2020)
Journal Article
Xie, P., Vakil, G., & Gerada, C. (2020). Electric drive systems with long feeder cables. IET Electric Power Applications, 14(1), 16-30. https://doi.org/10.1049/iet-epa.2018.5507

Electric drive systems with long feeder cables connecting inverter and machine are used for oil exploration, mining, remote operated vehicles, industrial, and aerospace applications. Though this topology has the advantage of providing a better operat... Read More about Electric drive systems with long feeder cables.

Impact of Single and Combined Faults Composed of Rotor Eccentricity and Stator Interturn Short Circuit on Electromagnetic Torque Ripples in Synchronous Generator (2020)
Journal Article
He, Y. L., Zhang, Z. J., Wang, X. L., Gao, P., Gerada, D., Gerada, C., & Vakil, G. (2020). Impact of Single and Combined Faults Composed of Rotor Eccentricity and Stator Interturn Short Circuit on Electromagnetic Torque Ripples in Synchronous Generator. Complexity, 2020, Article 535421. https://doi.org/10.1155/2020/8535421

In order to comprehensively study and identify the electromagnetic torque (EMT) difference among the single static air-gap eccentricity (SAGE) fault, the single stator interturn short circuit fault (SISC), and the combined fault composed of these two... Read More about Impact of Single and Combined Faults Composed of Rotor Eccentricity and Stator Interturn Short Circuit on Electromagnetic Torque Ripples in Synchronous Generator.

A Framework for Optimization of Hybrid Aircraft (2019)
Presentation / Conference Contribution
Zhao, X., Sahoo, S., Kyprianidis, K., Sumsurooah, S., Valente, G., Rashed, M., Vakil, G., Hill, C. I., Jacob, C., Gobbin, A., Bardenhagen, A., Prölss, K., Sielemann, M., Rantzer, J., & Ekstedt, E. (2019, June). A Framework for Optimization of Hybrid Aircraft. Presented at ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, Phoenix, Arizona, USA

To achieve the goals of substantial improvements in efficiency and emissions set by Flightpath 2050, fundamentally different concepts are required. As one of the most promising solutions, electrification of the aircraft primary propulsion is currentl... Read More about A Framework for Optimization of Hybrid Aircraft.

Enhancing the Torque Density of Conventional PM-SynRel Machine with Hybrid Flux Barrier (2019)
Presentation / Conference Contribution
Kumar, R. M. R., Vakil, G., Gerada, D., Walker, A., La Rocca, S., Al-Ani, M., Gerada, C., Paciura, K., McQueen, A., & Fernandes, B. G. (2019, October). Enhancing the Torque Density of Conventional PM-SynRel Machine with Hybrid Flux Barrier. Presented at 45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019), Lisbon, Portugal

Electrical machines with high torque density are required for traction application. Availability of bonded magnets with complex shapes and magnetization pattern can significantly extend the design space of electrical machines. This paper introduces a... Read More about Enhancing the Torque Density of Conventional PM-SynRel Machine with Hybrid Flux Barrier.

High Power High Speed PM-Assisted SynRel Machines with Ferrite and Rare Earth Magnets for Future Electric Commercial Vehicles (2019)
Presentation / Conference Contribution
Kumar, R. M. R., Zou, T., La Rocca, A., Vakil, G., Gerada, D., Walker, A., Gerada, C., Paciura, K., McQueen, A., & Fernandes, B. G. (2019, October). High Power High Speed PM-Assisted SynRel Machines with Ferrite and Rare Earth Magnets for Future Electric Commercial Vehicles. Presented at 45th Annual Conference of the IEEE Industrial Electronics Society (IECON 2019), Lisbon, Portugal

High power density and high torque density are the fundamental requirements for electric machines used in traction application. The former is obtained by potentially increasing the speed of the machine while the latter by using high energy density ra... Read More about High Power High Speed PM-Assisted SynRel Machines with Ferrite and Rare Earth Magnets for Future Electric Commercial Vehicles.

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.

Numerical study of the impact of different cooling arrangements on a high length/diameter ratio motor for electric commercial vehicle (2019)
Presentation / Conference Contribution
La Rocca, S., La Rocca, A., Walker, A., Vakil, G., Gerada, D., Al-Ani, M., Zou, T., Ramanathan, R., Gerada, C., McQueen, A., & Paciura, K. (2019, October). Numerical study of the impact of different cooling arrangements on a high length/diameter ratio motor for electric commercial vehicle. Presented at International Conference on Electrotechnical Complexes and Systems (ICOECS 2019), Ufa, Russia

Computational Fluid Dynamics (CFD) was used to carry out a fluid flow and thermal investigation of a high power dense traction machine for electric commercial vehicle. One of the features of the machine design considered is the high Length/Diameter (... Read More about Numerical study of the impact of different cooling arrangements on a high length/diameter ratio motor for electric commercial vehicle.

Multi-physics Design Optimisation of PM-assisted Synchronous Reluctance Motor for Traction Application (2019)
Presentation / Conference Contribution
Al-Ani, M., Walker, A., Vakil, G., Ramanathan, R., Zou, T., La Rocca, S., La Rocca, A., Gerada, D., Gerada, C., Paciura, K., & McQueen, A. (2019, October). Multi-physics Design Optimisation of PM-assisted Synchronous Reluctance Motor for Traction Application. Presented at IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, Lisbon, Portugal

Recently, the synchronous reluctance machine limits have been pushed toward meeting the requirements of traction applications. A skilled electromagnetic architecture of a synchronous reluctance machine with the help of permanent magnets can push the... Read More about Multi-physics Design Optimisation of PM-assisted Synchronous Reluctance Motor for Traction Application.

Rotor UMP & Mechanical Response in HSPMSM in Typical Running Conditions (2019)
Presentation / Conference Contribution
He, Y.-L., Vakil, G., Zhang, X.-C., Gao, P., Gerada, D., & Gerada, C. (2019, September). Rotor UMP & Mechanical Response in HSPMSM in Typical Running Conditions. Presented at 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019, Baltimore, MD, USA

This paper presents a comprehensive analysis on the rotor unbalanced magnetic pull (UMP) and the consequent mechanical response in 6 typical running conditions in a 20000 rpm high speed permanent magnet synchronous motor (HSPMSM) through finite eleme... Read More about Rotor UMP & Mechanical Response in HSPMSM in Typical Running Conditions.

Effect of 3D Unidirectional and Hybrid SAGE on Electromagnetic Torque Fluctuation Characteristics in Synchronous Generator (2019)
Journal Article
He, Y.-L., Xu, M.-X., Xiong, J., Sun, Y.-X., Wang, X.-L., Gerada, D., & Vakil, G. (2019). Effect of 3D Unidirectional and Hybrid SAGE on Electromagnetic Torque Fluctuation Characteristics in Synchronous Generator. IEEE Access, 7, 100813-100823. https://doi.org/10.1109/access.2019.2929868

This paper presents a comprehensive study on the variation laws of electromagnetic torque (EMT) under static air-gap eccentricity (SAGE) conditions in synchronous generators. Different from other studies, this paper focuses on not only the impact of... Read More about Effect of 3D Unidirectional and Hybrid SAGE on Electromagnetic Torque Fluctuation Characteristics in Synchronous Generator.

Sizing, design, and modelling of aerospace electric drive system with long feeder cables (2019)
Presentation / Conference Contribution
Xie, P., Vakil, G., & Gerarda, C. (2019, May). Sizing, design, and modelling of aerospace electric drive system with long feeder cables. Presented at IEMDC 2019 - International Electric Machines & Drives Conference, San Diego, California, USA

The aviation industry is tending towards more electric aircraft, replacing conventionally pneumatic, hydraulic, and mechanical systems with electrical solutions. The electrification of actuators is motivated by increased efficiency, reduced maintenan... Read More about Sizing, design, and modelling of aerospace electric drive system with long feeder cables.

Simplified Analytical Machine Sizing for Surface Mounted Permanent Magnet Machines (2019)
Presentation / Conference Contribution
Xie, P., Ramanathan, R., Vakil, G., & Gerada, C. (2019, May). Simplified Analytical Machine Sizing for Surface Mounted Permanent Magnet Machines. Presented at IEMDC 2019 - International Electric Machines & Drives Conference, San Diego, California, USA

This paper proposes a simple analytical machine sizing process for a three-phase surface mounted permanent magnet synchronous machines appropriate for both system level analysis and preliminary machine design. For system-level analysis, the proposed... Read More about Simplified Analytical Machine Sizing for Surface Mounted Permanent Magnet Machines.

Novel Motor-Shaped Rotational Inductor for Motor Drive Applications (2019)
Journal Article
Odhano, S., Khowja, M. R., Gerada, C., Vakil, G., Abebe, R., Odhano, S. A., Patel, C., & Wheeler, P. (2020). Novel Motor-Shaped Rotational Inductor for Motor Drive Applications. IEEE Transactions on Industrial Electronics, 67(3), 1844-1854. https://doi.org/10.1109/tie.2019.2907512

This paper presents a validation of the novel motor-shaped rotational inductor. To validate the concept, 12 slots 2 poles rotational inductor is tested at different supply frequencies and rotor speeds. Experimental results have shown that the iron lo... Read More about Novel Motor-Shaped Rotational Inductor for Motor Drive Applications.

The Influence of Stator Material on the Power Density and Iron Loss of a High-Performace Starter-Generator for More Electric Aircraft (2018)
Presentation / Conference Contribution
Golovanov, D., Xu, Z., Gerada, D., Degano, M., Vakil, G., & Gerada, C. (2018, October). The Influence of Stator Material on the Power Density and Iron Loss of a High-Performace Starter-Generator for More Electric Aircraft. Presented at 2018 21st International Conference on Electrical Machines and Systems (ICEMS), Jeju, South Korea

Maximizing the power density as well as efficiency are two of the main critical aspects for engineers who are designing electrical machines for aerospace applications. Iron losses have a significant impact on the total machine efficiency, thermal sta... Read More about The Influence of Stator Material on the Power Density and Iron Loss of a High-Performace Starter-Generator for More Electric Aircraft.

Combined Thermofluid and Electromagnetic Optimisation of Stator Vent Cooling (2018)
Presentation / Conference Contribution
Bersch, K., Nuzzo, S., Connor, P. H., Eastwick, C. N., Galea, M., Rolston, R., & Vakil, G. (2018, September). Combined Thermofluid and Electromagnetic Optimisation of Stator Vent Cooling. Presented at 2018 XIII International Conference on Electrical Machines (ICEM), Alexandroupoli, Greece

© 2018 IEEE. A combined electromagnetic and thermal modelling approach has been developed to optimise the design of multiple radial stator vents in an air-cooled, synchronous generator with a power rating of several hundred kVA. An experimentally val... Read More about Combined Thermofluid and Electromagnetic Optimisation of Stator Vent Cooling.

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.