All Outputs (15)

Active noise control by means of high frequency injection in electric motors (2024)
Journal Article
Skoulaxinos, S., Wheeler, P., & Vakil, G. (in press). Active noise control by means of high frequency injection in electric motors. IET Electric Power Applications, https://doi.org/10.1049/elp2.12442

Machine acoustics is an important area of research impacting the quality and comfort of human life. With increased levels of electrification and the wider use of electric motors, the contribution of motor drives towards quieter acoustic systems becom... Read More about Active noise control by means of high frequency injection in electric motors.

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.

Airgap Length Analysis of a 350kW PM-Assisted Syn-Rel Machine for Heavy Duty EV Traction (2022)
Journal Article
Zou, T., Gerada, D., La Rocca, S., La Rocca, A., Walker, A., Vakil, G., …Gerada, C. (2023). Airgap Length Analysis of a 350kW PM-Assisted Syn-Rel Machine for Heavy Duty EV Traction. IEEE Transactions on Industry Applications, 59(2), 1557-1570. https://doi.org/10.1109/TIA.2022.3225255

Synchronous reluctance (Syn-Rel) machines with embedded permanent magnets (PMs) are research hotspots in variable speed motor drives due to their robust rotor structure and wide constant power speed range (CPSR). In this paper, the potential of PM-as... Read More about Airgap Length Analysis of a 350kW PM-Assisted Syn-Rel Machine for Heavy Duty EV Traction.

Torque Limiters for Aerospace Actuator Application (2022)
Journal Article
Shahjahan Ahmad, S., Tom, L., La Rocca, A., La Rocca, S., Vakil, G., Gerada, C., & Benarous, M. (2022). Torque Limiters for Aerospace Actuator Application. Energies, 15(4), Article 1467. https://doi.org/10.3390/en15041467

Safety and reliability of electrical actuators are essential for success of all electric and more electric aircrafts (MEA). Torque limiters improve the reliability of electromechanical actuators (EMA) by restricting the amount of force experienced by... Read More about Torque Limiters for Aerospace Actuator Application.

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., …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.

How non-conventional machining affects the surface integrity and magnetic properties of non-oriented electrical steel (2021)
Journal Article
Winter, K., Liao, Z., Ramanathan, R., Axinte, D., Vakil, G., & Gerada, C. (2021). How non-conventional machining affects the surface integrity and magnetic properties of non-oriented electrical steel. Materials and Design, 210, Article 110051. https://doi.org/10.1016/j.matdes.2021.110051

Non-oriented electrical steel (NOES) laminations are commonly used to manufacture the rotor and stator core of electric machines. To achieve high machine efficiencies, it is desirable for these NOES laminations to be able to achieve a high saturation... Read More about How non-conventional machining affects the surface integrity and magnetic properties of non-oriented electrical steel.

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.

Optimization and Analysis of a High Power Density and Fault Tolerant Starter–Generator for Aircraft Application (2020)
Journal Article
Wang, B., Vakil, G., Liu, Y., Yang, T., Zhang, Z., & Gerada, C. (2021). Optimization and Analysis of a High Power Density and Fault Tolerant Starter–Generator for Aircraft Application. Energies, 14(1), Article 113. https://doi.org/10.3390/en14010113

Permanent magnet synchronous machines provide many dramatic electromagnetic performances such as high efficiency and high power density, which make them more competitive in aircraft electrification, whereas, designing a permanent magnet starter–gener... Read More about Optimization and Analysis of a High Power Density and Fault Tolerant Starter–Generator for Aircraft Application.

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.

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.

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.

Considerations on the effects that core material machining has on an electrical machine's performance (2018)
Journal Article
Al-Timimy, A., Vakil, G., Degano, M., Giangrande, P., Gerada, C., & Galea, M. (2018). Considerations on the effects that core material machining has on an electrical machine's performance. IEEE Transactions on Energy Conversion, 33(3), 1154-1163. https://doi.org/10.1109/TEC.2018.2808041

An often-overlooked aspect during the development process of electrical machines, is the validity and accuracy of the machine material properties being used at the design stage. Designers usually consider the data provided by the materials supplier,... Read More about Considerations on the effects that core material machining has on an electrical machine's performance.

Impact of Soft Magnetic Material on Design of High-Speed Permanent-Magnet Machines (2016)
Journal Article
Fernando, N., Vakil, G., Arumugam, P., Amankwah, E. K., Gerada, C., & Bozhko, S. (2017). Impact of Soft Magnetic Material on Design of High-Speed Permanent-Magnet Machines. IEEE Transactions on Industrial Electronics, 64(3), 2415-2423. https://doi.org/10.1109/TIE.2016.2587815

© 2016 IEEE. This paper investigates the effect of two soft magnetic materials on a high-speed machine design, namely, 6.5% silicon steel and cobalt-iron alloy. The effect of design parameters on the machine performance as an aircraft starter-generat... Read More about Impact of Soft Magnetic Material on Design of High-Speed Permanent-Magnet Machines.

Integrated motor drives: state of the art and future trends (2016)
Journal Article
Abebe, R., Vakil, G., Lo Calzo, G., Cox, T., Lambert, S., Johnson, C. M., …Mecrow, B. (2016). Integrated motor drives: state of the art and future trends. IET Electric Power Applications, 10(8), 757-771. https://doi.org/10.1049/iet-epa.2015.0506

With increased need for high power density, high efficiency and high temperature capabilities in aerospace and automotive applications, integrated motor drives (IMD) offers a potential solution. However, close physical integration of the converter an... Read More about Integrated motor drives: state of the art and future trends.

Methods of torque ripple reduction for flux reversal motor (2009)
Journal Article
Vakil, G., Sheth, N. K., & Miller, D. (2009). Methods of torque ripple reduction for flux reversal motor. Journal of Applied Physics, 105(7), Article 07F122. https://doi.org/10.1063/1.3076149

This paper presents two-dimensional finite element based results for various methods of torque ripple reduction in flux-reversal motors. The effects of variation in magnet and rotor pole heights, rotor pole skewing, and multiple teeth per rotor pole... Read More about Methods of torque ripple reduction for flux reversal motor.