Professor CHRISTOPHER GERADA's Outputs (460)

Experimental Investigation of Oil Jet Cooling in Electrical Machines with Hairpin Windings (2022)
Journal Article
Liu, C., Xu, Z., Gerada, D., Zhang, F., Chong, Y. C., Michon, M., Goss, J., Gerada, C., & Zhang, H. (2023). Experimental Investigation of Oil Jet Cooling in Electrical Machines with Hairpin Windings. IEEE Transactions on Transportation Electrification, 9(1), 598-608. https://doi.org/10.1109/TTE.2022.3186947

Oil jet cooling and hairpin windings have become popular in electrical machine design for modern electric vehicles. In recent years, these two technologies are often combined and can be found in many commercial products. The highly effective cooling... Read More about Experimental Investigation of Oil Jet Cooling in Electrical Machines with Hairpin Windings.

Analytical Model for the Open Circuit Field due to Different Magnetization Patterns of the rotor in the Slotless Machines (2022)
Presentation / Conference Contribution
Dave, N., Gerada, D., Vakil, G., Zhang, H., Li, J., & Gerada, C. (2022, September). Analytical Model for the Open Circuit Field due to Different Magnetization Patterns of the rotor in the Slotless Machines. Presented at ICEM 2022 XXV International Conference on Electrical Machines, Valencia, Spain

From the existing literature, the open circuit field due to different magnetisations of the rotor magnets is known. This includes field due to parallel, radial and Halbach magnetisation. This paper presents the generalised analytical model to represe... Read More about Analytical Model for the Open Circuit Field due to Different Magnetization Patterns of the rotor in the Slotless Machines.

Electromechanical Characteristics Analysis under DSISC Fault in Synchronous Generators (2022)
Journal Article
He, Y.-L., Qiu, M.-H., Yuan, X.-H., He, X.-L., Wang, H.-P., Jiang, M.-Y., Gerada, C., & Wan, S.-T. (2022). Electromechanical Characteristics Analysis under DSISC Fault in Synchronous Generators. Machines, 10(6), Article 432. https://doi.org/10.3390/machines10060432

This paper studies the electromechanical characteristics of synchronous generators under dynamic stator interturn short circuit (DSISC). First, the air gap magnetic flux density (MFD) of the generator under normal and DSISC fault was obtained. Then,... Read More about Electromechanical Characteristics Analysis under DSISC Fault in Synchronous Generators.

A multi-roller static model of the planetary roller screw mechanism considering load sharing (2022)
Journal Article
Fu, X., Li, X., Ma, S., Gerada, D., Liu, G., & Gerada, C. (2022). A multi-roller static model of the planetary roller screw mechanism considering load sharing. Tribology International, 173, Article 107648. https://doi.org/10.1016/j.triboint.2022.107648

A multi-roller static model is proposed to calculate load sharing and load distribution in a planetary roller screw mechanism (PRSM) with axial loads and errors. Taking into the actual positions of rollers, the PRSM is discretized into a multi-roller... Read More about A multi-roller static model of the planetary roller screw mechanism considering load sharing.

High Speed Permanent Magnet Assisted Synchronous Reluctance Machines - Part I: A General Design Approach (2022)
Journal Article
Gallicchio, G., Di Nardo, M., Palmieri, M., Marfoli, A., Degano, M., Gerada, C., & Cupertino, F. (2022). High Speed Permanent Magnet Assisted Synchronous Reluctance Machines - Part I: A General Design Approach. IEEE Transactions on Energy Conversion, 37(4), 1-1. https://doi.org/10.1109/tec.2022.3176382

The design of synchronous reluctance machines with and without permanent magnets assistance constitutes a challenging engineering task due to the numerous design variables and performance indexes to be considered. The design complexity increases even... Read More about High Speed Permanent Magnet Assisted Synchronous Reluctance Machines - Part I: A General Design Approach.

High Speed Permanent Magnet Assisted Synchronous Reluctance Machine - Part II: Performance Boundaries (2022)
Journal Article
Di Nardo, M., Gallicchio, G., Palmieri, M., Marfoli, A., Degano, M., Gerada, C., & Cupertino, F. (2022). High Speed Permanent Magnet Assisted Synchronous Reluctance Machine - Part II: Performance Boundaries. IEEE Transactions on Energy Conversion, 37(4), 2567-2577. https://doi.org/10.1109/tec.2022.3176383

The insertion of permanent magnets (PMs) within the rotor slots of Synchronous Reluctance Machines (SyRM) is the most common design strategy used to increase significantly their performance. In this paper it is shown how a permanent magnet assisted s... Read More about High Speed Permanent Magnet Assisted Synchronous Reluctance Machine - Part II: Performance Boundaries.

On the Use of Topology Optimization for Synchronous Reluctance Machines Design (2022)
Journal Article
Korman, O., Di Nardo, M., Degano, M., & Gerada, C. (2022). On the Use of Topology Optimization for Synchronous Reluctance Machines Design. Energies, 15(10), Article 3719. https://doi.org/10.3390/en15103719

Synchronous reluctance (SynRel) machines are considered one of the promising and cost-effective solutions to many industrial and mobility applications. Nonetheless, achieving an optimal design is challenging due to the complex correlation between geo... Read More about On the Use of Topology Optimization for Synchronous Reluctance Machines Design.

Electromagnetic Torque Fluctuating Properties under Dynamic RISC Fault in Turbogenerators (2022)
Journal Article
He, Y., Qiu, M., Yuan, X., Wang, H., Jiang, M., Gerada, C., & Wan, S. (2022). Electromagnetic Torque Fluctuating Properties under Dynamic RISC Fault in Turbogenerators. Energies, 15(10), Article 3821. https://doi.org/10.3390/en15103821

This paper analyzes the electromagnetic torque (EMT) fluctuation characteristics in synchronous generators under rotor interturn short-circuit (DRISC) fault. The novelty of this paper is that the DRISC fault is proposed based on the intermittent inte... Read More about Electromagnetic Torque Fluctuating Properties under Dynamic RISC Fault in Turbogenerators.

Analytical Methodology for Eddy Current Loss Simulation in Armature Windings of Synchronous Electrical Machines With Permanent Magnets (2022)
Journal Article
Golovanov, D., Galassini, A., Transi, T., & Gerada, C. (2022). Analytical Methodology for Eddy Current Loss Simulation in Armature Windings of Synchronous Electrical Machines With Permanent Magnets. IEEE Transactions on Industrial Electronics, 69(10), 9761-9770. https://doi.org/10.1109/tie.2022.3161818

This article describes a novel analytical methodology for eddy current losses simulation in the windings of permanent magnet synchronous machines. The methodology is based on subdomain modeling technique in conjunction with solving of ordinary differ... Read More about Analytical Methodology for Eddy Current Loss Simulation in Armature Windings of Synchronous Electrical Machines With Permanent Magnets.

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.

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.

Impact of Stator Segmentation on the Performance of Aerospace Propulsion Machines (2022)
Presentation / Conference Contribution
Ramanathan Mathavan Jeyabalan, R. K., Vakil, G., Gerada, D., Gerada, C., & Minshull, J. Impact of Stator Segmentation on the Performance of Aerospace Propulsion Machines. Presented at AeroTech, Pasadena California, United States

Electric machines offering a high power density are required for aerospace applications. Soft magnetic material with a high saturation flux density is one of the key component which is required to realize these power density targets. The need for a h... Read More about Impact of Stator Segmentation on the Performance of Aerospace Propulsion Machines.

Design Optimization of Modular Permanent Magnet Machine with Triple Three-Phase for Aircraft Starter Generator (2022)
Presentation / Conference Contribution
Wang, B., Rocca, A., Vakil, G., Yang, T., & Gerada, C. Design Optimization of Modular Permanent Magnet Machine with Triple Three-Phase for Aircraft Starter Generator. Presented at AeroTech

Permanent magnet (PM) electrical machine has far-reaching impacts in aviation electrification due to the continuous development in high power density and high efficiency electrical drives. The primary barrier to acceptance of permanent magnet machine... Read More about Design Optimization of Modular Permanent Magnet Machine with Triple Three-Phase for Aircraft Starter Generator.

Practical Implementation and Associated Challenges of Integrated Torque Limiter (2022)
Presentation / Conference Contribution
Ilkhani, M. R., Syed, S. A., Connor, P. H., Vakil, G., Gerada, C., Rashed, M., & Benarous, M. Practical Implementation and Associated Challenges of Integrated Torque Limiter

Evolving of aircraft design towards further electrification requires safe and fault-free operation of all the components. More electric aircraft are increasingly utilizing electro-mechanical actuators (EMA). EMAs are prone to jamming and subsequent f... Read More about Practical Implementation and Associated Challenges of Integrated Torque Limiter.

Profiling the Eddy Current Losses Variations of High-Speed Permanent Magnet Machines in Plug-in Hybrid Electric Vehicles (2022)
Journal Article
Huang, Z., Tang, M., Golovanov, D., Yang, T., Herring, S., Zanchetta, P., & Gerada, C. (2022). Profiling the Eddy Current Losses Variations of High-Speed Permanent Magnet Machines in Plug-in Hybrid Electric Vehicles. IEEE Transactions on Transportation Electrification, 8(3), 3451--3463. https://doi.org/10.1109/TTE.2022.3152845

High-speed permanent magnet (PM) machines have been recognized as a popular choice for plug-in hybrid electric vehicles (PHEVs). Although high-speed operation can enhance the machine power density, more rotor eddy current losses can be expected. Thos... Read More about Profiling the Eddy Current Losses Variations of High-Speed Permanent Magnet Machines in Plug-in Hybrid Electric Vehicles.

A Low-Complexity Modulated Model Predictive Torque and Flux Control Strategy for PMSM Drives Without Weighting Factor (2022)
Journal Article
Nasr, A., Gu, C., Buticchi, G., Bozhko, S., & Gerada, C. (2023). A Low-Complexity Modulated Model Predictive Torque and Flux Control Strategy for PMSM Drives Without Weighting Factor. IEEE Journal of Emerging and Selected Topics in Power Electronics, 11(2), 1305-1316. https://doi.org/10.1109/jestpe.2022.3152652

This article proposes a modulated model predictive torque and flux control (M2PTFC) method with low complexity for a two-level voltage source inverter (2L-VSI)-fed permanent magnet synchronous motor (PMSM). The proposed strategy aims to reduce the co... Read More about A Low-Complexity Modulated Model Predictive Torque and Flux Control Strategy for PMSM Drives Without Weighting Factor.

Synchronous Reluctance Machines: A Comprehensive Review and Technology Comparison (2022)
Journal Article
Murataliyev, M., Degano, M., Nardo, M. D., Bianchi, N., & Gerada, C. (2022). Synchronous Reluctance Machines: A Comprehensive Review and Technology Comparison. Proceedings of the IEEE, 110(3), 382-399. https://doi.org/10.1109/jproc.2022.3145662

In the last decade, the trend toward higher efficiency and higher torque density electrical machines (EMs) without permanent magnets (PMs) for the industrial sector has rapidly increased. This work discusses the latest research and industrial advance... Read More about Synchronous Reluctance Machines: A Comprehensive Review and Technology Comparison.

A Comprehensive Design Guideline of Hairpin Windings for High Power Density Electric Vehicle Traction Motors (2022)
Journal Article
Zou, T., Gerada, D., La Rocca, A., Moslemin, M., Cairns, A., Cui, M., Bardalai, A., Zhang, F., & Gerada, C. (2022). A Comprehensive Design Guideline of Hairpin Windings for High Power Density Electric Vehicle Traction Motors. IEEE Transactions on Transportation Electrification, 8(3), 3578-3593. https://doi.org/10.1109/TTE.2022.3149786

The rapidly increasing demand on power density levels of electric vehicle (EV) drive systems is pushing the boundaries of traction motor performance. Hairpin windings are becoming a popular option for EV motors due to their reduced DC losses and impr... Read More about A Comprehensive Design Guideline of Hairpin Windings for High Power Density Electric Vehicle Traction Motors.

Effect of Multi-Size Magnetic Powder Gradation on Magnetic Properties of Novel Composite Magnetic Materials for HSPMSM (2022)
Journal Article
Yao, J., Zhang, Y., Wang, H., Zhang, F., & Gerada, C. (2022). Effect of Multi-Size Magnetic Powder Gradation on Magnetic Properties of Novel Composite Magnetic Materials for HSPMSM. IEEE Transactions on Transportation Electrification, 8(3), 3594-3605. https://doi.org/10.1109/tte.2022.3149820

The ordinary high-speed permanent magnet synchronous machines (HSPMSMs) have the problems of high rotor temperature rise. In order to solve these problems, a novel composite rotor HSPMSM (NCR-HSPMSM) is proposed in this article. The novel composite r... Read More about Effect of Multi-Size Magnetic Powder Gradation on Magnetic Properties of Novel Composite Magnetic Materials for HSPMSM.

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.