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Professor CHRISTOPHER GERADA's Outputs (188)

High Frequency Harmonic Current Generator for More Electric Aircraft Based on GaN HFETs (2018)
Presentation / Conference Contribution
Wang, M., Fan, B., Xu, L., Kuiwang, K., Zheng, Z., Li, Y., Gerada, C., Zhang, H., & Li, J. (2018, November). High Frequency Harmonic Current Generator for More Electric Aircraft Based on GaN HFETs. Presented at 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC), Nottingham

© 2018 IEEE. With the development of more electric aircraft (MEA), the number of power electronic equipment and variable frequency electrical loads are increasing rapidly, which leads to challenges in terms of power quality of aircraft power system.... Read More about High Frequency Harmonic Current Generator for More Electric Aircraft Based on GaN HFETs.

State of the Art of Electric Taxiing Systems (2018)
Presentation / Conference Contribution
Lukic, M., Hebala, A., Giangrande, P., Klumpner, C., Nuzzo, S., Chen, G., Gerada, C., Eastwick, C., & Galea, M. (2018, November). State of the Art of Electric Taxiing Systems. Presented at 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC), Nottingham, UK

The aviation industry represents an ever-expanding economy and the aircraft market forecast reveals an optimistic growth for the coming decades. New requirements and guidelines call for a more efficient, reliable, and environment friendly aircraft op... Read More about State of the Art of Electric Taxiing Systems.

Performance Analysis of PMSM for High-Speed Starter-Generator System (2018)
Presentation / Conference Contribution
Diab, A., Gerada, C., Rashed, M., Bozhko, S., & Li, J. (2018, November). Performance Analysis of PMSM for High-Speed Starter-Generator System. Presented at 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC), Nottingham, UK

© 2018 IEEE. This paper presents the operating characteristics of surface-mounted permanent magnet synchronous machine taking into account the influence of stator resistance and inductance variation at high frequencies, whose effect are always neglec... Read More about Performance Analysis of PMSM for High-Speed Starter-Generator System.

A Holistic Electrical Machine Design Tool for More-Electric and Hybrid-Electric Aircraft (2018)
Presentation / Conference Contribution
Golovanov, D., Xu, Z., Gerada, D., Gerada, C., & Papini, L. (2018, November). A Holistic Electrical Machine Design Tool for More-Electric and Hybrid-Electric Aircraft. Presented at 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC), Nottingham, UK

The power density of electrical machines required for more-electric and hybrid-electric aircraft has become a critical aspect and target of optimization. This paper looks at the development aspects of a multi-domain tool to aid for system-level optim... Read More about A Holistic Electrical Machine Design Tool for More-Electric and Hybrid-Electric Aircraft.

A Novel Thermal Network Model Used for Temperature Calculation and Analysis on Brushless Doubly-Fed Generator With Winding Encapsulating Structure (2018)
Journal Article
Jiang, X., Zhang, Y., Jin, S., Zhang, F., & Gerada, C. (2019). A Novel Thermal Network Model Used for Temperature Calculation and Analysis on Brushless Doubly-Fed Generator With Winding Encapsulating Structure. IEEE Transactions on Industry Applications, 55(2), 1473-1483. https://doi.org/10.1109/tia.2018.2883542

© 1972-2012 IEEE. In recent years, magnetic-barrier rotor has been put forward for brushless doubly-fed generator (BDFG) application owing to its desirable performance, such as high power density and strong magnetic coupling ability. However, it also... Read More about A Novel Thermal Network Model Used for Temperature Calculation and Analysis on Brushless Doubly-Fed Generator With Winding Encapsulating Structure.

A Novel Newton-Raphson-Based Searching Method for the MTPA Control of Pmasynrm Considering Magnetic and Cross Saturation (2018)
Presentation / Conference Contribution
Wang, S., Degano, M., Kang, J., Galassini, A., & Gerada, C. (2018, September). A Novel Newton-Raphson-Based Searching Method for the MTPA Control of Pmasynrm Considering Magnetic and Cross Saturation. Presented at 2018 XIII International Conference on Electrical Machines (ICEM), Alexandroupoli, Greece

Maximum torque per ampere control (MTPA) takes full advantage of the reluctance torque aiming at the minimum copper loss, which can increase the torque output under the minimum current conditions. The traditional MTPA method makes use of equations wi... Read More about A Novel Newton-Raphson-Based Searching Method for the MTPA Control of Pmasynrm Considering Magnetic and Cross Saturation.

An Integrated Method for Three-Phase AC Excitation and High-Frequency Voltage Signal Injection for Sensorless Starting of Aircraft Starter/Generator (2018)
Journal Article
Wei, J., Xu, H., Zhou, B., Zhang, Z., & Gerada, C. (2019). An Integrated Method for Three-Phase AC Excitation and High-Frequency Voltage Signal Injection for Sensorless Starting of Aircraft Starter/Generator. IEEE Transactions on Industrial Electronics, 66(7), 5611-5622. https://doi.org/10.1109/tie.2018.2871795

© 1982-2012 IEEE. This paper proposes an integrated method of three-phase ac excitation and high-frequency voltage signal injection (HFVSI) for sensorless controlled starting of brushless synchronous machines (BSM) used as starter/generator in variab... Read More about An Integrated Method for Three-Phase AC Excitation and High-Frequency Voltage Signal Injection for Sensorless Starting of Aircraft Starter/Generator.

Thermal analysis of fault-tolerant electrical machines for aerospace actuators (2018)
Journal Article
Madonna, V., Giangrande, P., Galea, M., & Gerada, C. (2019). Thermal analysis of fault-tolerant electrical machines for aerospace actuators. IET Electric Power Applications, 13(7), 843 – 852. https://doi.org/10.1049/iet-epa.2018.5153

For safety critical applications, electrical machines need to satisfy several constraints, in order to be considered fault-tolerant. In fact, if specific design choices and appropriate control strategies are embraced, fault-tolerant machines can oper... Read More about Thermal analysis of fault-tolerant electrical machines for aerospace actuators.

Improved thermal management and analysis for stator end-windings of electrical machines (2018)
Journal Article
Madonna, V., Walker, A., Giangrande, P., Serra, G., Gerada, C., & Galea, M. (2019). Improved thermal management and analysis for stator end-windings of electrical machines. IEEE Transactions on Industrial Electronics, 66(7), 5057-5069. https://doi.org/10.1109/tie.2018.2868288

In electrical machine design, thermal management plays a key role in improving performance and reducing size. End-windings are commonly identified as the machine hot-spot. Hence, lowering and predicting end-windings temperature are crucial tasks in t... Read More about Improved thermal management and analysis for stator end-windings of electrical machines.

Investigation of AC Copper and Iron Losses in High-Speed High-Power Density PMSM (2018)
Presentation / Conference Contribution
Al-Timimy, A., Giangrande, P., Degano, M., Galea, M., & Gerada, C. (2018, September). Investigation of AC Copper and Iron Losses in High-Speed High-Power Density PMSM. Presented at 23rd International Conference on Electrical Machines (ICEM 2018), Alexandroupoli, Greece

This paper presents a detailed investigation of AC copper losses in high-speed high-power density permanent magnet synchronous machine. For parallel strands winding, it is not easy to accurately estimate the AC copper losses using finite element mode... Read More about Investigation of AC Copper and Iron Losses in High-Speed High-Power Density PMSM.

Electrical Machine Rotor Shielding for Low Cost Electrical Drive (2018)
Presentation / Conference Contribution
Al-Ani, M., Vakil, G., & Gerada, C. (2018, June). Electrical Machine Rotor Shielding for Low Cost Electrical Drive. Presented at 2018 IEEE Transportation and Electrification Conference and Expo, ITEC 2018, Long Beach, California, USA

Electrical machine rotor shielding has been proposed for high-speed electrical machines, i.e. ≥50krpm, where a smooth current waveform becomes difficult and costly to generate due to the required high switching frequency. The rotor shielding is used... Read More about Electrical Machine Rotor Shielding for Low Cost Electrical Drive.

Design of an Integrated Inductor for 45kW Aerospace Starter-Generator (2018)
Presentation / Conference Contribution
Raza Khowja, M., Gerada, C., Vakil, G., Quadri, S. Q., Wheeler, P., & Patel, C. (2018, June). Design of an Integrated Inductor for 45kW Aerospace Starter-Generator. Presented at 2018 IEEE Transportation and Electrification Conference and Expo (ITEC), Long, CA, USA

A close physical and functional integration of passive components is required to make an efficient and power dense overall system. Such power dense systems are a prerequisite in aerospace and marine applications. This paper presents a design of an in... Read More about Design of an Integrated Inductor for 45kW Aerospace Starter-Generator.

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.

A methodology to remove stator skew in small-medium size synchronous generators via innovative damper cage designs (2018)
Journal Article
Nuzzo, S., Bolognesi, P., Vakil, G., Fallows, D., Gerada, C., Brown, N. L., & Galea, M. (2019). A methodology to remove stator skew in small-medium size synchronous generators via innovative damper cage designs. IEEE Transactions on Industrial Electronics, 66(6), 4926-4307. https://doi.org/10.1109/tie.2018.2864699

This paper proposes and investigates an innovative methodology that can have a significant impact on the market potential of wound field, small-medium size synchronous generators. The technique proposed here is aimed at removing the need for the trad... Read More about A methodology to remove stator skew in small-medium size synchronous generators via innovative damper cage designs.

Development of aircraft electric starter-generator system based-on active rectification technology (2018)
Journal Article
Bozhko, S., Yang, T., Le Peuvedic, J.-M., Arumugam, P., Degano, M., La Rocca, A., Xu, Z., Rashed, M., Fernando, W., Hill, C. I., Eastwick, C., Pickering, S., Gerada, C., & Wheeler, P. (2018). Development of aircraft electric starter-generator system based-on active rectification technology. IEEE Transactions on Transportation Electrification, 4(4), 985-996. https://doi.org/10.1109/TTE.2018.2863031

More-electric aircraft (MEA) has become a dominant trend for modern aircraft. On-board MEA, many functions, which are conventionally driven by pneumatic and hydraulic power, are replaced with electrical subsystems. Starting aircraft engines with an e... Read More about Development of aircraft electric starter-generator system based-on active rectification technology.

Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle (2018)
Presentation / Conference Contribution
Talha, A., Vakil, G., Cox, T., & Gerada, C. (2018, April). Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle. Presented at PEMD 2018 - 9th International Conference on Power Electronics, Machines and Drives

A switched reluctance machine (SRM) is very robust and capable to perform well under harsh conditions. It is simple in construction and avoids the use of magnets so it is cheap to manufacture. The powertrain of a hybrid vehicle presents challenging c... Read More about Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle.

Performance Improvement of Bearingless Multisector PMSM With Optimal Robust Position Control (2018)
Journal Article
Valente, G., Formentini, A., Papini, L., Gerada, C., & Zanchetta, P. (2019). Performance Improvement of Bearingless Multisector PMSM With Optimal Robust Position Control. IEEE Transactions on Power Electronics, 34(4), 3575-3585. https://doi.org/10.1109/TPEL.2018.2853038

© 2018 IEEE. Bearingless machines are relatively new devices that consent to suspend and spin the rotor at the same time. They commonly rely on two independent sets of three-phase windings to achieve a decoupled torque and suspension force control. I... Read More about Performance Improvement of Bearingless Multisector PMSM With Optimal Robust Position Control.

Space Weather Prediction to Enhance the Reliability of the More Electric Aircraft (2018)
Presentation / Conference Contribution
Guo, J., Buticchi, G., & Gerada, C. (2018, June). Space Weather Prediction to Enhance the Reliability of the More Electric Aircraft. Presented at IEEE 27th International Symposium on Industrial Electronics (ISIE 2018 ), Cairns, Queensland, Australia

Power devices manufacturers know that electronic devices are susceptible to radiation events. Galactic Cosmic Rays (GCR) coming from space can interact with the earth atmosphere, generating secondary particles (electrons, neutrons, protons) that can... Read More about Space Weather Prediction to Enhance the Reliability of the More Electric Aircraft.

Eccentric reluctance and permanent magnets synchronous machines comparison (2018)
Journal Article
Mahmoud, H., Bianchi, N., Degano, M., Al-Ani, M., & Gerada, C. (2018). Eccentric reluctance and permanent magnets synchronous machines comparison. IEEE Transactions on Industry Applications, 54(6), 5760-5771. https://doi.org/10.1109/TIA.2018.2848278

This paper deals with a comparative study between reluctance (REL), permanent magnet assisted reluctance (PMAREL), and surface mounted permanent magnet synchronous machines with rotor eccentricity. Static, dynamic, and combined eccentricity cases are... Read More about Eccentric reluctance and permanent magnets synchronous machines comparison.