All Outputs (147)

Self-excitation and energy recovery of air-core compulsators (2017)
Journal Article
Zhao, W., Wu, S., Cui, S., Gerada, C., Zhang, H., & Xu, Z. (2017). Self-excitation and energy recovery of air-core compulsators. IEEE Transactions on Plasma Science, 45(7), 1168-1174. https://doi.org/10.1109/TPS.2017.2700027

As power supplies, compulsators are popular choices for high-end railgun power supplies. In order to increase power and energy density, air-core compulsators are proposed by using composite materials instead of traditional iron-core compulsators. Due... Read More about Self-excitation and energy recovery of air-core compulsators.

Controlling DC permeability in cast steels (2017)
Journal Article
Sumner, A., Gerada, C., Brown, N., & Clare, A. (2017). Controlling DC permeability in cast steels. Journal of Magnetism and Magnetic Materials, 429, 79-85. https://doi.org/10.1016/j.jmmm.2016.12.137

Annealing (at multiple cooling rates) and quenching (with tempering) was performed on specimens of cast steel of varying composition. The aim was to devise a method for selecting the steel with the highest permeability, from any given range of steels... Read More about Controlling DC permeability in cast steels.

History and recent advancements of electric propulsion and integrated electrical power systems for commercial & naval vessels (2016)
Presentation / Conference Contribution
Yang, T., Cox, T., Degano, M., Bozhko, S., & Gerada, C. (2016). History and recent advancements of electric propulsion and integrated electrical power systems for commercial & naval vessels.

Due to developments in power electronics, electric machines, energy storage and control, electric propulsion and integrated electrical power systems have become major trends for commercial and naval vessels. This is mainly due to the fact that the us... Read More about History and recent advancements of electric propulsion and integrated electrical power systems for commercial & naval vessels.

Assessment of cooling methods for increased power density in electrical machines (2016)
Presentation / Conference Contribution
Tighe, C., Gerada, C., & Pickering, S. (in press). Assessment of cooling methods for increased power density in electrical machines.

A comprehensive thermal analysis of three different electrical machines is presented, with a view of identifying design aspects that can be exploited to achieve higher power density. A review of some novel cooling methods is initially made. Following... Read More about Assessment of cooling methods for increased power density in electrical machines.

Novel integrative options for passive filter inductor in high speed AC drives (2016)
Presentation / Conference Contribution
Raza Khowja, M., Gerada, C., Vakil, G., Wheeler, P., & Patel, C. (2016). Novel integrative options for passive filter inductor in high speed AC drives. In IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society. https://doi.org/10.1109/IECON.2016.7793661

This paper presents novel integration options for passive inductor which include: motor-shaped rotational and motor-shaped rotor-less inductor for high speed motor drive system. The novel options have been designed and their performance is compared w... Read More about Novel integrative options for passive filter inductor in high speed AC drives.

Design optimization of Halbach array permanent magnet motor to achieve sensorless performance using genetic algorithm (2016)
Journal Article
Caner, M., Gerada, C., Asher, G., & Özer, T. (2016). Design optimization of Halbach array permanent magnet motor to achieve sensorless performance using genetic algorithm. COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 35(5), https://doi.org/10.1108/COMPEL-06-2015-0218

Purpose The purpose of this paper is to investigate Halbach array effects in surface mounted permanent magnet machine (SMPM) in terms of both self-sensing and torque capabilities. A comparison between a conventional SMPM, which has radially magnet... Read More about Design optimization of Halbach array permanent magnet motor to achieve sensorless performance using genetic algorithm.

Stator and rotor vent modelling in a MVA rated synchronous machine (2016)
Presentation / Conference Contribution
Connor, P. H., Eastwick, C., Pickering, S. J., Gerada, C., & Rolston, R. (2016). Stator and rotor vent modelling in a MVA rated synchronous machine. In 2016 XXII International Conference on Electrical Machines (ICEM) (571-577). https://doi.org/10.1109/ICELMACH.2016.7732583

An investigation into the solution dependence of a conjugate heat transfer computational fluid dynamics (CFD) model of a synchronous generator, with respect to meshing, has been carried out. Utilising CFD as a tool for investigating the airflow and t... Read More about Stator and rotor vent modelling in a MVA rated synchronous machine.

Short term duty electrical machines (2016)
Presentation / Conference Contribution
Arumugam, P., & Gerada, C. (2016). Short term duty electrical machines.

This paper presents a design of a short term duty electrical machine working in an extreme environment consisting of 80oC ambient temperature and altitudes of over 30,000m. Higher power density is a key factor in the design wherein the machine’s oper... Read More about Short term duty electrical machines.

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.

An investigation into the geometric parameters affecting field uniformity in four pole magnetisers (2015)
Journal Article
Bartolo, J. B., Klimczyk, P., Tiwisina, K., Denke, P., Siebert, S., & Gerada, C. (2015). An investigation into the geometric parameters affecting field uniformity in four pole magnetisers. International Journal of Applied Electromagnetics and Mechanics, 48(2,3), https://doi.org/10.3233/JAE-151992

In recent years, the field-metric method for measuring the joule losses set up in an electrical steel laminate when subjected to a rotating field has gained popularity. The ideal geometry of the magnetiser required to set up such a field is still how... Read More about An investigation into the geometric parameters affecting field uniformity in four pole magnetisers.

Modeling and analysis of eddy current losses in permanent magnet machines with multi-stranded bundle conductors (2015)
Journal Article
Arumugam, P., Dusek, J., Mezani, S., Hamiti, T., & Gerada, C. (in press). Modeling and analysis of eddy current losses in permanent magnet machines with multi-stranded bundle conductors. Mathematics and Computers in Simulation, 130, https://doi.org/10.1016/j.matcom.2015.10.010

This paper investigates the influence of eddy current losses in multi-stranded bundle conductors employed in out-runner permanent magnet machines, by adopting an analytical model. The analytical model is based on a sub-domain field model that solves... Read More about Modeling and analysis of eddy current losses in permanent magnet machines with multi-stranded bundle conductors.

Turn-turn short circuit fault management in permanent magnet machines (2015)
Journal Article
Arumugam, P., Hamiti, T., & Gerada, C. (in press). Turn-turn short circuit fault management in permanent magnet machines. IET Electric Power Applications, 9(9), https://doi.org/10.1049/iet-epa.2015.0020

This paper presents a systematic study on turn-turn short circuit fault and ways to manage them to provide a basis for comparison of the various options available. The possible methods to reduce the likelihood of the winding SC fault and the fault mi... Read More about Turn-turn short circuit fault management in permanent magnet machines.

Computation of wound rotor induction machines based on coupled finite elements and circuit equation under a first space harmonic approximation (2015)
Journal Article
Mezani, S., Hamiti, T., Belguerras, L., Lubin, T., & Gerada, C. (2015). Computation of wound rotor induction machines based on coupled finite elements and circuit equation under a first space harmonic approximation. IEEE Transactions on Magnetics, 52(3), https://doi.org/10.1109/TMAG.2015.2478798

The paper presents a fast method to compute wound rotor induction machines in steady state. Coupled time-harmonic FE-circuit equation are used under a first space harmonic approximation for the air-gap magnetic field. It is shown that only 4 magnetos... Read More about Computation of wound rotor induction machines based on coupled finite elements and circuit equation under a first space harmonic approximation.

Development of an axial flux MEMS BLDC micromotor with increased efficiency and power density (2015)
Journal Article
Ding, X., Liu, G., Du, M., Guo, H., Qiao, H., & Gerada, C. (2015). Development of an axial flux MEMS BLDC micromotor with increased efficiency and power density. Energies, 8(7), https://doi.org/10.3390/en8076608

This paper presents a rigorous design and optimization of an axial flux microelectromechanical systems (MEMS) brushless dc (BLDC) micromotor with dual rotor improving both efficiency and power density with an external diameter of only around 10 mm. T... Read More about Development of an axial flux MEMS BLDC micromotor with increased efficiency and power density.

Magnetically geared induction machines (2015)
Journal Article
Mezani, S., Hamiti, T., Belguerras, L., Lubin, T., Rashed, M., & Gerada, C. (2015). Magnetically geared induction machines. IEEE Transactions on Magnetics, 51(11), https://doi.org/10.1109/TMAG.2015.2443252

A wound-rotor induction machine is artfully coupled to a magnetic gear to achieve a high-torque-density drive system called magnetically geared induction machine (MaGIM). The high-speed rotor of MaGIM is common to both the machine and gear sides. A r... Read More about Magnetically geared induction machines.

A topology selection consideration of electrical machines for traction applications: towards the FreedomCar 2020 targets (2015)
Presentation / Conference Contribution
Walker, A., Galea, M., Gerada, C., Mebarki, A., & Gerada, D. (2015). A topology selection consideration of electrical machines for traction applications: towards the FreedomCar 2020 targets. . https://doi.org/10.1109/EVER.2015.7112923

This paper details a qualitative comparison between different types of electrical machine for hybrid electric vehicle traction applications. Targets set by the US Department of Energy for the year 2020 are used as goals. Several types of machine for... Read More about A topology selection consideration of electrical machines for traction applications: towards the FreedomCar 2020 targets.

Design considerations for high performance traction machines: Aiming for the FreedomCar 2020 targets (2015)
Presentation / Conference Contribution
Walker, A., Galea, M., Gerada, C., Mebarki, A., & Gerada, D. (2015). Design considerations for high performance traction machines: Aiming for the FreedomCar 2020 targets. . https://doi.org/10.1109/ESARS.2015.7101451

This paper presents considerations for the design of high performance, interior permanent magnet machines for traction applications. These machines will be designed to reach the FreedomCar 2020 targets set by the US Department of Energy for the year... Read More about Design considerations for high performance traction machines: Aiming for the FreedomCar 2020 targets.

Permanent magnet machine design trade-offs to achieve sensorless control at high load (2015)
Journal Article
Caner, M., Gerada, C., & Asher, G. (2015). Permanent magnet machine design trade-offs to achieve sensorless control at high load. COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 34(1), 324-343. https://doi.org/10.1108/compel-02-2014-0039

Purpose The purpose of this paper is to introduce a new design optimization technique for a surface mounted permanent magnet (SMPM) machine to increase sensorless performance at high loadings by compromising with torque capability. Design/meth... Read More about Permanent magnet machine design trade-offs to achieve sensorless control at high load.

Automatic design of Synchronous Reluctance motors focusing on barrier shape optimization (2014)
Journal Article
Pellegrino, G., Cupertino, F., & Gerada, C. (2014). Automatic design of Synchronous Reluctance motors focusing on barrier shape optimization. IEEE Transactions on Industry Applications, 51(2), https://doi.org/10.1109/TIA.2014.2345953

The automated design of Synchronous Reluctance motors based on Multi-Objective, Genetic Optimization and Finite Element Analysis is considered in this paper. Three types of barrier shapes are considered, all described by an effective, limited set of... Read More about Automatic design of Synchronous Reluctance motors focusing on barrier shape optimization.

Design of synchronous reluctance motors with multiobjective optimization algorithms (2014)
Journal Article
Cupertino, F., Pellegrino, G., & Gerada, C. (2014). Design of synchronous reluctance motors with multiobjective optimization algorithms. IEEE Transactions on Industry Applications, 50(6), https://doi.org/10.1109/TIA.2014.2312540

The automatic design of Synchronous Reluctance (SyR) machines is considered in this paper by means of Finite Element Analysis and Multi-Objective Optimization Algorithms (MOOA). The research focuses on the design of the rotor geometry which is the ke... Read More about Design of synchronous reluctance motors with multiobjective optimization algorithms.