Synchronous reluctance motor iron losses analytical model and optimization (2018)
Conference Proceeding
Mahmoud, H., Degano, M., Bacco, G., Bianchi, N., & Gerada, C. (2018). Synchronous reluctance motor iron losses analytical model and optimization

The complex rotor structure of synchronous reluctance machines causes a high harmonic content in the air-gap flux density and then flux density fluctuations in different iron parts. The importance of determining accurately the total iron losses in th... Read More

A holistic electrical machine design tool for more-electric and hybrid-electric aircraft (2018)
Conference Proceeding
Golovanov, D., Xu, Z., Gerada, D., Gerada, C., & Papini, L. (2018). A holistic electrical machine design tool for more-electric and hybrid-electric aircraft. In 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC)

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

Open-circuit fault tolerant study of bearingless multi-sector permanent magnet machines (2018)
Conference Proceeding
Valente, G., Papini, L., Formentini, A., Gerada, C., & Zanchetta, P. (2018). Open-circuit fault tolerant study of bearingless multi-sector permanent magnet machines. doi:10.23919/IPEC.2018.8507470

This paper presents a fault tolerant study of a multiphase sectored permanent magnet synchronous machine involving a tripel three-phase winding. The machine electromagnetic model is written in a general way so that it can be extended and applied to a... Read More

Study of a Silicon Carbide MOSFET power module to establish the benefits of adding anti-parallel Schottky diodes (2018)
Conference Proceeding
Trentin, A., Hind, D., Degano, M., Tighe, C., Arevalo, S. L., Yang, L., …Packwood, M. (2018). Study of a Silicon Carbide MOSFET power module to establish the benefits of adding anti-parallel Schottky diodes. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE)doi:10.1109/ecce.2018.8557415

The majority of commercial Silicon Carbide (SiC) MOSFET based power modules available on the market today also include SiC Schottky diodes placed in anti-parallel with the MOSFETs. Using an accurate electrical and thermal simulation model this paper... Read More

Thermal analysis of fault-tolerant electrical machines for aerospace actuators (2018)
Journal Article
Madonna, V., Giangrande, P., Galea, M., & Gerada, C. (2018). Thermal analysis of fault-tolerant electrical machines for aerospace actuators. IET Electric Power Applications, doi:10.1049/iet-epa.2018.5153. ISSN 1751-8660

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

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. (2018). Improved thermal management and analysis for stator end-windings of electrical machines. IEEE Transactions on Industrial Electronics, doi:10.1109/tie.2018.2868288. ISSN 0278-0046

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

Enhanced power sharing transient with droop controllers for multi-three-phase synchronous electrical machines (2018)
Journal Article
Galassini, A., Costabeber, A., Degano, M., Gerada, C., Tessarolo, A., & Menis, R. (2018). Enhanced power sharing transient with droop controllers for multi-three-phase synchronous electrical machines. IEEE Transactions on Industrial Electronics, doi:10.1109/tie.2018.2868029

This paper presents a droop-based dis- tributed control strategy for multi-three-phase machines that provides augmented controllability during power shar- ing transients. The proposed strategy is able to mitigate the mutual interactions among differe... Read More

Investigation of AC copper and iron losses in high-speed high-power density PMSM (2018)
Conference Proceeding
Al-Timimy, A., Giangrande, P., Degano, M., Galea, M., & Gerada, C. (2018). Investigation of AC copper and iron losses in high-speed high-power density PMSM. doi:10.1109/ICELMACH.2018.8507166

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

A novel Newton-Raphson-based searching method for the MTPA control of PMaSynRM considering magnetic and cross saturation (2018)
Conference Proceeding
Wang, S., Degano, M., Kang, J., Galassini, A., & Gerada, C. (2018). A novel Newton-Raphson-based searching method for the MTPA control of PMaSynRM considering magnetic and cross saturation. In Proceedings 2018 XIII International Conference on Electrical Machines (ICEM)doi:10.1109/icelmach.2018.8506853

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

Electrical machine rotor shielding for low cost electrical drive (2018)
Conference Proceeding
Al-Ani, M., Vakil, G., & Gerada, C. (2018). Electrical machine rotor shielding for low cost electrical drive. In 2018 IEEE Transportation Electrification Conference and Expo (ITEC)doi:10.1109/ITEC.2018.8450226

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

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. (2018). A methodology to remove stator skew in small-medium size synchronous generators via innovative damper cage designs. IEEE Transactions on Industrial Electronics, (1-1). doi:10.1109/tie.2018.2864699. ISSN 0278-0046

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

Development of aircraft electric starter-generator system based-on active rectification technology (2018)
Journal Article
Bozhko, S., Yang, T., Le Peuvedic, J., Arumugam, P., Degano, M., La Rocca, A., …Wheeler, P. (2018). Development of aircraft electric starter-generator system based-on active rectification technology. IEEE Transactions on Transportation Electrification, doi: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

Performance analysis of PMSM for high-speed starter-generator system (2018)
Conference Proceeding
Diab, A., Gerada, C., Rashed, M., Bozhko, S., & Li, J. (in press). Performance analysis of PMSM for high-speed starter-generator system

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 neglected in the pr... Read More

Wide bandgap voltage source inverter design for automotive electric drivetrain (2018)
Conference Proceeding
Savi, F., Buticchi, G., Gerada, C., Wheeler, P., & Barater, D. (in press). Wide bandgap voltage source inverter design for automotive electric drivetrain

In this paper a high power, high frequency voltage source inverter for automotive traction application is reviewed. The main objectives of the design process is the maximization of power density, while keeping high efficiency and low weight. In this... Read More

State of the art of electric taxiing systems (2018)
Conference Proceeding
Lukic, M., Hebala, A., Giangrande, P., Klumpner, C., Nuzzo, S., Chen, G., …Galea, M. (in press). State of the art of electric taxiing systems. In NA

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

High frequency harmonic current generator for more electric aircraft based on GaN HFETs (2018)
Conference Proceeding
Wang, M., Fan, B., Xu, L., Kuiwang, K., Zheng, Z., Li, Y., …Zhang, H. (in press). High frequency harmonic current generator for more electric aircraft based on GaN HFETs

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. In this paper... Read More

Performance comparison of doubly salient reluctance generators for high-voltage DC power system of more electric aircraft (2018)
Conference Proceeding
Li, Y., Zhang, Z., Gerada, D., & Gerada, C. (in press). Performance comparison of doubly salient reluctance generators for high-voltage DC power system of more electric aircraft. In NA

The generation performance of the switched reluctance machine (SRM)-based starter/generator (S/G) and the doubly salient electromagnetic machine (DSEM)-based S/G is analyzed and compared in this paper. The topologies, operation principles of the doub... Read More

Response to Discussion of “A modular speed-drooped system for high reliability integrated modular motor drives” (2018)
Journal Article
Galassini, A., Costabeber, A., Degano, M., Gerada, C., Buticchi, G., & Barater, D. (2018). Response to Discussion of “A modular speed-drooped system for high reliability integrated modular motor drives”. IEEE Transactions on Industry Applications, doi:10.1109/tia.2018.2858191. ISSN 0093-9994

Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle (2018)
Conference Proceeding
Talha, A., Vakil, G., Cox, T., & Gerada, C. (2018). Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle. In NA

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

Dielectric breakdown of alumina thin films produced by pulsed direct current magnetron sputtering (2018)
Journal Article
Hanby, B. V., Stuart, B. W., Grant, C., Moffat, J., Blissett, J., Gerada, C., …Grant, D. M. (2018). Dielectric breakdown of alumina thin films produced by pulsed direct current magnetron sputtering. Thin Solid Films, 662, (145-154). doi:10.1016/j.tsf.2018.07.004. ISSN 0040-6090

Alumina films (~2 μm thick) were deposited with a mixed Cu/Al interlayer onto copper. Direct current (DC)/Pulsed DC (PDC) magnetron sputtering techniques were independently compared for reactive alumina sputtering. In DC sputtered films, elemental al... Read More