Professor CHRISTOPHER GERADA's Outputs (265)

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.

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.

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.

Rotor Slot Design of Squirrel Cage Induction Motors with Improved Rated Efficiency and Starting Capability (2022)
Journal Article
Di Nardo, M., Marfoli, A., Degano, M., & Gerada, C. (2022). Rotor Slot Design of Squirrel Cage Induction Motors with Improved Rated Efficiency and Starting Capability. IEEE Transactions on Industry Applications, 58(3), 3383-3393. https://doi.org/10.1109/TIA.2022.3147156

Among the electro-mechanical devices transforming energy from electrical to mechanical, the squirrel cage induction motor can be surely considered a workhorse of the industry due to its robustness, low cost and good performance when directly fed by t... Read More about Rotor Slot Design of Squirrel Cage Induction Motors with Improved Rated Efficiency and Starting Capability.

Performance Entitlement by Using Novel High Strength Electrical Steels and Copper Alloys for High-Speed Laminated Rotor Induction Machines (2022)
Journal Article
Zhang, F., Gerada, D., Xu, Z., He, Y., Zhang, H., Hua, W., & Gerada, C. (2022). Performance Entitlement by Using Novel High Strength Electrical Steels and Copper Alloys for High-Speed Laminated Rotor Induction Machines. Electronics, 11(2), 210. https://doi.org/10.3390/electronics11020210

The laminated rotor Induction Machine (IM), with its simple construction and manufacturing, robustness, ease of control and comparatively lower cost remains by far the most utilized electromechanical energy converter. At very high speeds, traditional... Read More about Performance Entitlement by Using Novel High Strength Electrical Steels and Copper Alloys for High-Speed Laminated Rotor Induction Machines.

Integrated Damper Cage for THD Improvements of Variable Speed Salient-Pole Synchronous Generators for the More Electric Aircraft (2021)
Journal Article
Wang, Y., Nuzzo, S., Gerada, C., Zhang, H., Zhao, W., & Galea, M. (2022). Integrated Damper Cage for THD Improvements of Variable Speed Salient-Pole Synchronous Generators for the More Electric Aircraft. IEEE Transactions on Transportation Electrification, 8(3), 3618-3629. https://doi.org/10.1109/tte.2021.3139366

Wound field synchronous generators (WFSGs) have been implemented as aircraft main ac power generation for decades. The trend of moving toward more electric aircraft (MEA) made dc and variable-frequency ac buses favorable for the next-generation power... Read More about Integrated Damper Cage for THD Improvements of Variable Speed Salient-Pole Synchronous Generators for the More Electric Aircraft.

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.

Impact of Static Air-Gap Eccentricity on Thermal Responses of Stator Winding Insulation in Synchronous Generators (2021)
Journal Article
He, Y.-L., Sun, K., Wu, Y., Zhao, H.-S., Wang, X.-L., Gerada, C., & Gerada, D. (2022). Impact of Static Air-Gap Eccentricity on Thermal Responses of Stator Winding Insulation in Synchronous Generators. IEEE Transactions on Industrial Electronics, 69(12), 13544-13554. https://doi.org/10.1109/TIE.2021.3135627

In this article, we present a comprehensive analysis on the thermal response characteristics of the stator winding insulation under static air-gap eccentricity (SAGE) conditions in synchronous generators. Different from previous studies, this article... Read More about Impact of Static Air-Gap Eccentricity on Thermal Responses of Stator Winding Insulation in Synchronous Generators.

Carbon Emission Analysis of Electrical Machines (2021)
Presentation / Conference Contribution
Zhang, X., Xu, Z., Gerada, C., & Gerada, D. (2021, October). Carbon Emission Analysis of Electrical Machines. Presented at 24th International Conference on Electrical Machines and Systems (ICEMS 2021), Gyeongju, Korea, Republic of

The industry places increased importance on carbon reduction. Many are focused on lowering the fuel consumption of electrical machines, however, carbon emissions from the acquisition of raw materials and the energy consumption of manufacturing proces... Read More about Carbon Emission Analysis of Electrical Machines.

An Extended State Loop Filter With Position Error Observer for Sensorless IPMSM Drives (2021)
Journal Article
Xu, Z., & Gerada, C. (2022). An Extended State Loop Filter With Position Error Observer for Sensorless IPMSM Drives. IEEE Transactions on Industrial Electronics, 69(12), 12213-12224. https://doi.org/10.1109/tie.2021.3134061

Sensorless drives of interior permanent magnet synchronous motors (IPMSMs) find a broad range of applications due to their inherent benefits. In practical electrified propulsions, the IPMSM drives are usually working in highly utilized conditions whe... Read More about An Extended State Loop Filter With Position Error Observer for Sensorless IPMSM Drives.

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.

Significance of Anisotropic Thermal Expansion in High Speed Electric Machines Employing NdFeB Permanent Magnets (2021)
Journal Article
Kumar, R., La Rocca, A., Vakil, G., Gerada, D., Gerada, C., & Fernandes, B. G. (2021). Significance of Anisotropic Thermal Expansion in High Speed Electric Machines Employing NdFeB Permanent Magnets. Energies, 14(22), Article 7558. https://doi.org/10.3390/en14227558

Many high speed applications employ a surface permanent magnet (PM) machine topology with a retaining sleeve due to its robustness and ability to achieve high overall peripheral speeds as well as efficiencies. One often overlooked feature in the mech... Read More about Significance of Anisotropic Thermal Expansion in High Speed Electric Machines Employing NdFeB Permanent Magnets.

Calculation Model of Armature Reaction Magnetic Field of Interior Permanent Magnet Synchronous Motor With Segmented Skewed Poles (2021)
Journal Article
An, Y., Ma, C., Zhang, N., Guo, Y., Degano, M., Gerada, C., Bu, F., Yin, X., Li, Q., & Zhou, S. (2022). Calculation Model of Armature Reaction Magnetic Field of Interior Permanent Magnet Synchronous Motor With Segmented Skewed Poles. IEEE Transactions on Energy Conversion, 37(2), 1115-1123. https://doi.org/10.1109/tec.2021.3123359

In an interior permanent magnet synchronous motor (IPMSM) with segmented skewed poles, the armature reaction magnetic field (AR-MF) changes nonlinearly due to the saturation of the rotor magnetic barrier. Meanwhile, this varies under different excita... Read More about Calculation Model of Armature Reaction Magnetic Field of Interior Permanent Magnet Synchronous Motor With Segmented Skewed Poles.

Influence of the Magnetic Load on High Speed Synchronous Reluctance Machines Design (2021)
Presentation / Conference Contribution
Gallicchio, G., Palmieri, M., Cupertino, F., Di Nardo, M., Degano, M., & Gerada, C. (2021, October). Influence of the Magnetic Load on High Speed Synchronous Reluctance Machines Design. Presented at IECON 2021 - 47th Annual Conference of the IEEE Industrial Electronics Society, Toronto, ON, Canada

Synchronous reluctance machines are becoming a widespread solution in many engineering areas thanks to their simple rotor structure, the absence of rare-earth permanent magnets and high efficiency. The design of such machines is a widely investigated... Read More about Influence of the Magnetic Load on High Speed Synchronous Reluctance Machines Design.

Modelling, Analysis and Design Considerations of Multi-Phase Bearingless Permanent Magnet Synchronous Machine (2021)
Presentation / Conference Contribution
Marfoli, A., Nardo, M. D., Garvey, S., Degano, M., Vashisht, R., Turnbull, R., & Gerada, C. (2021, October). Modelling, Analysis and Design Considerations of Multi-Phase Bearingless Permanent Magnet Synchronous Machine. Presented at IEEE Energy Conversion Congress and Exposition (ECCE 2021), Vancouver, BC, Canada

This paper presents a general multi-harmonics analytical model able to predict both torque and force behaviour of a multi-phase permanent magnet synchronous machine. This machine topology can be adopted in bearingless applications and in application... Read More about Modelling, Analysis and Design Considerations of Multi-Phase Bearingless Permanent Magnet Synchronous Machine.

Open-Circuit Air-Gap Magnetic Field Calculation of Interior Permanent Magnet Synchronous Motor With V-Shaped Segmented Skewed Poles Using Hybrid Analytical Method (2021)
Journal Article
An, Y., Ma, C., Zhang, N., Guo, Y., Degano, M., Gerada, C., Li, Q., & Zhou, S. (2021). Open-Circuit Air-Gap Magnetic Field Calculation of Interior Permanent Magnet Synchronous Motor With V-Shaped Segmented Skewed Poles Using Hybrid Analytical Method. IEEE Transactions on Magnetics, 57(12), Article 8108309. https://doi.org/10.1109/tmag.2021.3118222

Due to the local inhomogeneous magnetic saturation of the core of the interior permanent magnet synchronous motor (IPMSM), the magnetic field changes nonlinearly, which makes the analytical calculation of the magnetic field difficult. Therefore, the... Read More about Open-Circuit Air-Gap Magnetic Field Calculation of Interior Permanent Magnet Synchronous Motor With V-Shaped Segmented Skewed Poles Using Hybrid Analytical Method.

Design of Rare-Earth-Free PM-assisted Synchronous Reluctance Machine for Heavy-duty Automotive Application (2021)
Presentation / Conference Contribution
Al-ani, M., La Rocca, S., La Rocca, A., Walker, A., Ramanathan, R., Zou, T., Vakil, G., Gerada, D., Gerada, C., Paciura, K., & McQueen, A. (2020, December). Design of Rare-Earth-Free PM-assisted Synchronous Reluctance Machine for Heavy-duty Automotive Application. Presented at The 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020), Online Conference

Electrical machines designed for automotive applications are characterised by high torque density, wide speed range and low cost. The use of NdFeB magnets in such machines can achieve the required high torque density and wide speed range, however, it... Read More about Design of Rare-Earth-Free PM-assisted Synchronous Reluctance Machine for Heavy-duty Automotive Application.

Hairpin Windings: An Opportunity for Next-Generation E-Motors in Transportation (2021)
Journal Article
Nuzzo, S., Barater, D., Gerada, C., & Vai, P. (2022). Hairpin Windings: An Opportunity for Next-Generation E-Motors in Transportation. IEEE Industrial Electronics Magazine, 16(4), 52-59. https://doi.org/10.1109/mie.2021.3106571

Advances in electrical machines and power electronics (PEs) are helping to achieve the power density and efficiency required by the transportation sector. However, the reliability of components and production processes is a challenge. This is especia... Read More about Hairpin Windings: An Opportunity for Next-Generation E-Motors in Transportation.

Neural Network aided PMSM multi-objective design and optimization for more-electric aircraft applications (2021)
Journal Article
Gao, Y., Yang, T., Bozhko, S., Wheeler, P., Dragicevic, T.-L., & Gerada, C. (2022). Neural Network aided PMSM multi-objective design and optimization for more-electric aircraft applications. Chinese Journal of Aeronautics, 35(10), 233-246. https://doi.org/10.1016/j.cja.2021.08.006

This study uses the Neural Network (NN) technique to optimize design of surface-mounted Permanent Magnet Synchronous Motors (PMSMs) for More-Electric Aircraft (MEA) applications. The key role of NN is to provide dedicated correction factors for the a... Read More about Neural Network aided PMSM multi-objective design and optimization for more-electric aircraft applications.

Femtocore: An Application Specific Processor for Vertically Integrated High Performance Real-Time Controls (2021)
Journal Article
Savi, F., Harikumaran, J., Barater, D., Buticchi, G., Gerada, C., & Wheeler, P. (2021). Femtocore: An Application Specific Processor for Vertically Integrated High Performance Real-Time Controls. IEEE Open Journal of the Industrial Electronics Society, 2, 479-488. https://doi.org/10.1109/OJIES.2021.3112124

In applications that require a high availability and high performance (for example aerospace),modular power electronics and multi-phase machines represent an advantageous choice. In this framework, a control system able to handle a high number of PWM... Read More about Femtocore: An Application Specific Processor for Vertically Integrated High Performance Real-Time Controls.