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Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors (2024)
Journal Article
Naderiallaf, H., Degano, M., Gerada, C., & Gerada, D. (2024). Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors. IEEE Transactions on Dielectrics and Electrical Insulation, 1-1. https://doi.org/10.1109/tdei.2024.3355032

This contribution elucidates the impact of the fillet radius, a geometric feature of rectangular insulated wires not commonly considered, on the partial discharge inception voltage (PDIV) in low-voltage machine turn-to-turn winding insulation. Initia... Read More about Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors.

Assessment of Edgewise Insulated Wire Bend Radius Impact on Dielectric Properties of Turn-to-Turn Insulation through Thermal Ageing (2023)
Journal Article
Naderiallaf, H., Degano, M., & Gerada, C. (2023). Assessment of Edgewise Insulated Wire Bend Radius Impact on Dielectric Properties of Turn-to-Turn Insulation through Thermal Ageing. IEEE Transactions on Dielectrics and Electrical Insulation, https://doi.org/10.1109/TDEI.2023.3309780

This study aims to evaluate the impact of the bending radius of edgewise insulated wires on dielectric properties such as partial discharge inception voltage (PDIV), partial discharge extinction voltage (PDEV), dielectric dissipation factor (DDF), an... Read More about Assessment of Edgewise Insulated Wire Bend Radius Impact on Dielectric Properties of Turn-to-Turn Insulation through Thermal Ageing.

PDIV Modelling for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors through Thermal Ageing (2023)
Journal Article
Naderiallaf, H., Degano, M., & Gerada, C. (2023). PDIV Modelling for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors through Thermal Ageing. IEEE Transactions on Dielectrics and Electrical Insulation, 1-10. https://doi.org/10.1109/tdei.2023.3307048

This contribution develops the partial discharge inception voltage (PDIV)-FEM-based model based on Schumann’s streamer inception criterion (SCSIC) with respect to thermal ageing time (TAGT) or the insulation lifetime for the turn-to-turn insulation o... Read More about PDIV Modelling for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors through Thermal Ageing.

Amorphous-crystalline nanostructured Nd-Fe-B permanent magnets using laser powder bed fusion: Metallurgy and magnetic properties (2023)
Journal Article
Wu, J., Aboulkhair, N. T., Robertson, S., Zhou, Z., Bagot, P. A., Moody, M. P., …Hague, R. J. (2023). Amorphous-crystalline nanostructured Nd-Fe-B permanent magnets using laser powder bed fusion: Metallurgy and magnetic properties. Acta Materialia, 259, 119239. https://doi.org/10.1016/j.actamat.2023.119239

Laser powder-bed fusion (PBF-LB), a class of additive manufacturing (AM), has attracted wide interest in the production of Nd-Fe-B permanent magnets, benefiting from the minimisation of waste of rare-earth elements and the post-processing requirement... Read More about Amorphous-crystalline nanostructured Nd-Fe-B permanent magnets using laser powder bed fusion: Metallurgy and magnetic properties.

Fast Assessment of Rotor Barrier Dimensional Allowances in Synchronous Reluctance Machines (2023)
Journal Article
Madariaga, C., Gallardo, C., Tapia, J. A., Jara, W., Escobar, A., & Degano, M. (2023). Fast Assessment of Rotor Barrier Dimensional Allowances in Synchronous Reluctance Machines. IEEE Access, 11, 58349-58358. https://doi.org/10.1109/access.2023.3284753

Tolerance analysis on synchronous reluctance machines (SynRM) is mandatory if accurate refinements of the rotor structure are adopted, a must for low-ripple applications However, the impact of manufacturing/dimensional tolerances or material degradat... Read More about Fast Assessment of Rotor Barrier Dimensional Allowances in Synchronous Reluctance Machines.

Rotor Vibration Control using Multi-Three-Phase Permanent Magnet Synchronous Machines (2023)
Conference Proceeding
Di Nardo, M., Ilkhani, M. R., Wang, M., Degano, M., Gerada, C., Sala, G., …Hoppert, M. (2023). Rotor Vibration Control using Multi-Three-Phase Permanent Magnet Synchronous Machines. In 2023 IEEE International Electric Machines & Drives Conference (IEMDC). https://doi.org/10.1109/IEMDC55163.2023.10238954

This paper investigates the possibility to control the radial displacements of the shaft of an electrical machine equipped with a multi-three-phase winding arrangement with the aim of reducing the related vibrations. A comprehensive dynamic modeling... Read More about Rotor Vibration Control using Multi-Three-Phase Permanent Magnet Synchronous Machines.

Design of an aircraft generator with radial force control. (2023)
Journal Article
Brecher, C., Neus, S., Gärtner, M., Eckel, H., Hoppert, M., James, B., …Di Nardo, M. (2023). Design of an aircraft generator with radial force control. Open Research Europe, 2, Article 73. https://doi.org/10.12688/openreseurope.14684.3

With the increasing electrical energy demands in aviation propulsion systems, the increase in the onboard generators’ power density is inevitable. During the flight, forces coming from the gearbox or gyroscopic forces generated by flight manoeuvres l... Read More about Design of an aircraft generator with radial force control..

Radical technology innovations for high‐speed transport; ePlanes to replace rail? (2023)
Journal Article
Riley, P. H., Degano, M., & Gerada, C. (2023). Radical technology innovations for high‐speed transport; ePlanes to replace rail?. IET Electrical Systems in Transportation, 13(1), Article 12061. https://doi.org/10.1049/els2.12061

This paper evaluates various modes of transport against the dual requirements of Net-Zero carbon emissions and user convenience, in particular, speed of travel and cost of transportation. Results show that when operated across a whole country, batter... Read More about Radical technology innovations for high‐speed transport; ePlanes to replace rail?.

Surface Permanent Magnet Synchronous Machines: High Speed Design and Limits (2022)
Journal Article
Gallicchio, G., Nardo, M. D., Palmieri, M., Ilkhani, M. R., Degano, M., Gerada, C., & Cupertino, F. (2023). Surface Permanent Magnet Synchronous Machines: High Speed Design and Limits. IEEE Transactions on Energy Conversion, 38(2), 1311-1324. https://doi.org/10.1109/tec.2022.3225224

Surface permanent magnet synchronous machines are one of the most widely adopted machine topologies in high-speed applications where efficiency and power factor cannot be compromised. Although the design of such machine type has been extensively inve... Read More about Surface Permanent Magnet Synchronous Machines: High Speed Design and Limits.

2-DOF Decoupled Discrete Current Control for AC Drives at Low Sampling-to-Fundamental Frequency Ratios (2022)
Journal Article
Wang, M., Buticchi, G., Li, J., Gu, C., Gerada, D., Degano, M., …Gerada, C. (2023). 2-DOF Decoupled Discrete Current Control for AC Drives at Low Sampling-to-Fundamental Frequency Ratios. IEEE Transactions on Transportation Electrification, 9(2), 2048-2058. https://doi.org/10.1109/TTE.2022.3210909

In high performance drive systems, wide bandwidth and reference tracking accuracy of current control loop are fundamental requirements. The conventional PI controller provides robustness against the machine parameter mismatching and zero steady-state... Read More about 2-DOF Decoupled Discrete Current Control for AC Drives at Low Sampling-to-Fundamental Frequency Ratios.

Power Loss and Performance Analysis of a Permanent Magnet Synchronous Motor for Actuator Applications (2022)
Conference Proceeding
Tameemi, A., Degano, M., Di Nardo, M., Murataliyev, M., Gerada, D., Xu, Z., & Gerada, C. (2022). Power Loss and Performance Analysis of a Permanent Magnet Synchronous Motor for Actuator Applications. In 2022 International Conference on Electrical Machines (ICEM) (807-813). https://doi.org/10.1109/icem51905.2022.9910911

Permanent magnet synchronous motors are very suitable in applications demanding high power density with high performance requirements, such as in aerospace actuators. Achieving high performance targets while keeping the total weight of the electrical... Read More about Power Loss and Performance Analysis of a Permanent Magnet Synchronous Motor for Actuator Applications.

Comparison of AC Losses in the Winding of Electrical Machines with Fixed Strands Positions, Fixed Conductor Shapes and Random Winding (2022)
Journal Article
Bardalai, A., Gerada, D., Zou, T., Degano, M., Zhang, C., & Gerada, C. (2022). Comparison of AC Losses in the Winding of Electrical Machines with Fixed Strands Positions, Fixed Conductor Shapes and Random Winding. Energies, 15(15), Article 5701. https://doi.org/10.3390/en15155701

In high performance electric machines, the increase of fundamental frequency leads to additional losses in the winding due to parasitic effects such as the associated skin and proximity effects. In the first part, this paper presents an investigation... Read More about Comparison of AC Losses in the Winding of Electrical Machines with Fixed Strands Positions, Fixed Conductor Shapes and Random Winding.

Decoupled Discrete Current Control for AC Drives at Low Sampling-to-Fundamental Frequency Ratios (2022)
Journal Article
Wang, M., Buticchi, G., Li, J., Gu, C., Gerada, D., Degano, M., …Geradab, C. (2022). Decoupled Discrete Current Control for AC Drives at Low Sampling-to-Fundamental Frequency Ratios. IEEE Journal of Emerging and Selected Topics in Power Electronics, https://doi.org/10.1109/jestpe.2022.3179184

Implementation of proportional-integral (PI) controllers in synchronous reference frame (SRF) is a well-established current control solution for electric drives. It is a general and effective method in digital control as long as the ratio of Sampling... Read More about Decoupled Discrete Current Control for AC Drives at Low Sampling-to-Fundamental Frequency Ratios.

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, 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.

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.

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.

Influence of the Magnetic Load on High Speed Synchronous Reluctance Machines Design (2021)
Conference Proceeding
Gallicchio, G., Palmieri, M., Cupertino, F., Di Nardo, M., Degano, M., & Gerada, C. (2021). Influence of the Magnetic Load on High Speed Synchronous Reluctance Machines Design. In IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society. https://doi.org/10.1109/IECON48115.2021.9589972

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)
Conference Proceeding
Marfoli, A., Nardo, M. D., Garvey, S., Degano, M., Vashisht, R., Turnbull, R., & Gerada, C. (2021). Modelling, Analysis and Design Considerations of Multi-Phase Bearingless Permanent Magnet Synchronous Machine. In 2021 IEEE Energy Conversion Congress and Exposition (ECCE) (4646-4653). https://doi.org/10.1109/ECCE47101.2021.9595524

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.

High-Speed Synchronous Reluctance Machines: Materials Selection and Performance Boundaries (2021)
Journal Article
Di Nardo, M., Gallicchio, G., Palmieri, M., Marfoli, A., Lo Calzo, G., Degano, M., …Cupertino, F. (2022). High-Speed Synchronous Reluctance Machines: Materials Selection and Performance Boundaries. IEEE Transactions on Transportation Electrification, 8(1), 1228-1241. https://doi.org/10.1109/TTE.2021.3109452

This article presents a comprehensive comparative design exercise of synchronous reluctance (SyR) machines considering different soft magnetic materials and a wide range of speeds. First, a general design methodology able to consider all the conseque... Read More about High-Speed Synchronous Reluctance Machines: Materials Selection and Performance Boundaries.

Improved Thermal Modeling and Experimental Validation of Oil-Flooded High-Performance Machines with Slot-Channel Cooling (2021)
Journal Article
Zhang, F., Gerada, D., Xu, Z., Zhang, X., Zhang, H., Gerada, C., …Degano, M. (2022). Improved Thermal Modeling and Experimental Validation of Oil-Flooded High-Performance Machines with Slot-Channel Cooling. IEEE Transactions on Transportation Electrification, 8(1), 312-324. https://doi.org/10.1109/TTE.2021.3106819

Thermal management is often considered a bottleneck in the pursuit of the next-generation electrical machines for electrified transportation with a step change in power density. Slot-channel cooling is considered to be an effective cooling technique,... Read More about Improved Thermal Modeling and Experimental Validation of Oil-Flooded High-Performance Machines with Slot-Channel Cooling.

A Novel Flux Barrier Parametrization for Synchronous Reluctance Machines (2021)
Journal Article
Korman, O., Di Nardo, M., Degano, M., & Gerada, C. (2021). A Novel Flux Barrier Parametrization for Synchronous Reluctance Machines. IEEE Transactions on Energy Conversion, 37(1), 675-684. https://doi.org/10.1109/TEC.2021.3099628

This paper presents a novel parametrization for the flux barrier profiles of synchronous reluctance and permanent magnet assisted reluctance machines. In literature there are several methods used to design rotor flux barriers of various types, howeve... Read More about A Novel Flux Barrier Parametrization for Synchronous Reluctance Machines.

Modular Power Sharing Control for Bearingless Multi-Three Phase Permanent Magnet Synchronous Machine (2021)
Journal Article
Wen, Z., Di Nardo, M., Sala, G., Valente, G., Marfoli, A., Degano, M., …Gerada, C. (2022). Modular Power Sharing Control for Bearingless Multi-Three Phase Permanent Magnet Synchronous Machine. IEEE Transactions on Industrial Electronics, 69(7), 6600-6610. https://doi.org/10.1109/TIE.2021.3097610

This paper proposes a modular approach to the power sharing control of permanent magnet synchronous bearingless machine. The selected machine topology features a winding layout with phases distributed into non-overlapping three phase groups, a soluti... Read More about Modular Power Sharing Control for Bearingless Multi-Three Phase Permanent Magnet Synchronous Machine.

Process-structure-property relationships in laser powder bed fusion of permanent magnetic Nd-Fe-B (2021)
Journal Article
Wu, J., Aboulkhair, N. T., Degano, M., Ashcroft, I., & Hague, R. J. (2021). Process-structure-property relationships in laser powder bed fusion of permanent magnetic Nd-Fe-B. Materials and Design, 209, Article 109992. https://doi.org/10.1016/j.matdes.2021.109992

Laser powder-bed fusion (L-PBF), as an additive manufacturing (AM) technique, has demonstrated excellent capabilities in achieving degrees of freedom in manufacturing that are otherwise unattainable. The potential of combining Nd-Fe-B as a permanent... Read More about Process-structure-property relationships in laser powder bed fusion of permanent magnetic Nd-Fe-B.

High Speed Synchronous Reluctance Machines: Modeling, Design and Limits (2021)
Journal Article
Gallicchio, G., Di Nardo, M., Palmieri, M., Marfoli, A., Degano, M., Gerada, C., & Cupertino, F. (2022). High Speed Synchronous Reluctance Machines: Modeling, Design and Limits. IEEE Transactions on Energy Conversion, 37(1), 585-597. https://doi.org/10.1109/TEC.2021.3086879

An important barrier to the adoption and acceptance of synchronous reluctance (SyR) machines in different applications lies in their non-standardized design procedure. The conflicting requirements incurring at high speeds among electromagnetic torque... Read More about High Speed Synchronous Reluctance Machines: Modeling, Design and Limits.

Optimised Design of Permanent Magnet Assisted Synchronous Reluctance Machines for Household Appliances (2021)
Journal Article
Degano, M., Murataliyev, M., Shuo, W., Barater, D., Buticchi, G., Jara, W., …Gerada, C. (2021). Optimised Design of Permanent Magnet Assisted Synchronous Reluctance Machines for Household Appliances. IEEE Transactions on Energy Conversion, 36(4), 3084-3095. https://doi.org/10.1109/tec.2021.3076675

This paper is focused on the design, optimisation and control of a permanent magnet assisted synchronous reluctance machine (PMaSynRel) for low cost high efficiency household appliances, in particular a motor for washing machine. The design and optim... Read More about Optimised Design of Permanent Magnet Assisted Synchronous Reluctance Machines for Household Appliances.

Permanent Magnet Reduction by Current Harmonics Injection for Surface Permanent Magnet Machines (2021)
Conference Proceeding
De Gaetano, D., Sala, G., Degano, M., & Gerada, C. (2021). Permanent Magnet Reduction by Current Harmonics Injection for Surface Permanent Magnet Machines. In 2021 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) (137-142). https://doi.org/10.1109/wemdcd51469.2021.9425662

This paper presents the analysis of multi-harmonic current injection in multi-three phase surface permanent magnet (SPM) machines. An analytical model, extended to a generic harmonic order, is used to describe and determine the no load flux density,... Read More about Permanent Magnet Reduction by Current Harmonics Injection for Surface Permanent Magnet Machines.

4-MW Class High-Power-Density Generator for Future Hybrid-Electric Aircraft (2021)
Journal Article
Golovanov, D., Gerada, D., Sala, G., Degano, M., Trentin, A., Connor, P. H., …Gerada, C. (2021). 4-MW Class High-Power-Density Generator for Future Hybrid-Electric Aircraft. IEEE Transactions on Transportation Electrification, 7(4), 2952-2964. https://doi.org/10.1109/TTE.2021.3068928

This article describes the underpinning research, development, construction, and testing of a 4-MW multithree phase generator designed for a hybrid-electric aircraft propulsion system demonstrator. The aim of the work is to demonstrate gravimetric po... Read More about 4-MW Class High-Power-Density Generator for Future Hybrid-Electric Aircraft.

Research and Realization of High-Power Medium-Voltage Active Rectifier Concepts for Future Hybrid-Electric Aircraft Generation (2020)
Journal Article
Trentin, A., Sala, G., Tarisciotti, L., Galassini, A., Degano, M., Connor, P. H., …Gerada, C. (2021). Research and Realization of High-Power Medium-Voltage Active Rectifier Concepts for Future Hybrid-Electric Aircraft Generation. IEEE Transactions on Industrial Electronics, 68(12), 11684-11695. https://doi.org/10.1109/TIE.2020.3040692

In this article, we describe the research and development of a 3 kV active rectifier for a 4 MW aerospace generator drive system demonstrator. The converter is fed by a multiphase high-speed/high-frequency permanent magnet generator. The main aim of... Read More about Research and Realization of High-Power Medium-Voltage Active Rectifier Concepts for Future Hybrid-Electric Aircraft Generation.

Homothetic Design in Synchronous Reluctance Machines and Effects on Torque Ripple (2020)
Journal Article
Murataliyev, M., Degano, M., Di Nardo, M., Bianchi, N., Tessarolo, A., Jara, W., …Gerada, C. (2021). Homothetic Design in Synchronous Reluctance Machines and Effects on Torque Ripple. IEEE Transactions on Energy Conversion, 36(3), 2195-2205. https://doi.org/10.1109/TEC.2020.3042441

This paper presents a novel design concept for Synchronous Reluctance (SynRel) machines aimed at reducing the torque ripple. Two general sizing approaches based on the homothetic scaling principle are defined and compared. An in depth analysis on the... Read More about Homothetic Design in Synchronous Reluctance Machines and Effects on Torque Ripple.

Experimental Statistical Method Predicting AC Losses on Random Windings and PWM Effect Evaluation (2020)
Journal Article
Preci, E., Valente, G., Galassini, A., Yuan, X., Degano, M., Gerada, D., …Gerada, C. (2021). Experimental Statistical Method Predicting AC Losses on Random Windings and PWM Effect Evaluation. IEEE Transactions on Energy Conversion, 36(3), 2287-2296. https://doi.org/10.1109/TEC.2020.3040265

Nowadays, one of the challenges in transport electrification is the reduction of the components' size and weight in order to improve the power density. This is often achieved by designing electrical machines with higher rotational speeds and excitati... Read More about Experimental Statistical Method Predicting AC Losses on Random Windings and PWM Effect Evaluation.

Influence of Rotor Design on Electromagnetic Performance in Interior Permanent Magnet Machines (2020)
Conference Proceeding
Transi, T., Murataliyev, M., Degano, M., Preci, E., Gerada, D., & Gerada, C. (2020). Influence of Rotor Design on Electromagnetic Performance in Interior Permanent Magnet Machines. . https://doi.org/10.1109/iecon43393.2020.9255237

Nowadays, Interior Permanent Magnet Synchronous Machines (IPMSM) are widely adopted in various sectors such as automotive, railway or public transportation (e- buses, trams, etc.). Among the benefits that these machines present, they offer a number o... Read More about Influence of Rotor Design on Electromagnetic Performance in Interior Permanent Magnet Machines.

Influence of Optimisation Target Functions on Synchronous Reluctance Machines Design (2020)
Conference Proceeding
Korman, O., Nardo, M. D., Degano, M., & Gerada, C. (2020). Influence of Optimisation Target Functions on Synchronous Reluctance Machines Design. . https://doi.org/10.1109/iecon43393.2020.9254529

Synchronous reluctance machines (SynRel) are becoming very attractive for different applications because of their reluctance nature, easy manufacturability and low cost. Their design still represents a challange because of the many degrees of freedom... Read More about Influence of Optimisation Target Functions on Synchronous Reluctance Machines Design.

Rectangular and Random Conductors: AC Losses Evaluations and Manufacturing Considerations (2020)
Conference Proceeding
Preci, E., Valente, G., Bardalai, A., Transi, T., Zou, T., Gerada, D., …Gerada, C. (2020). Rectangular and Random Conductors: AC Losses Evaluations and Manufacturing Considerations. . https://doi.org/10.1109/iecon43393.2020.9254278

This paper presents a comparison between hairpin and random distributed winding in electrical machines for automotive applications. Indeed, the overall performance of an electrical drive system is seriously affected by its winding design. The conside... Read More about Rectangular and Random Conductors: AC Losses Evaluations and Manufacturing Considerations.

Power-Sharing Control in Bearingless Multi-Sector and Multi-Three-Phase Permanent Magnet Machines (2020)
Journal Article
Sala, G., Valente, G., Nardo, M. D., Degano, M., Zanchetta, P., & Gerada, C. (2021). Power-Sharing Control in Bearingless Multi-Sector and Multi-Three-Phase Permanent Magnet Machines. IEEE Transactions on Industrial Electronics, 68(10), 9070-9080. https://doi.org/10.1109/tie.2020.3026273

This paper deals with the power-sharing control of bearingless multi-sector and multi-three-phase permanent magnet machines. The proposed control strategy allows to distribute the power flows among the three-phase inverters supplying the machine duri... Read More about Power-Sharing Control in Bearingless Multi-Sector and Multi-Three-Phase Permanent Magnet Machines.

A Complete Equivalent Circuit for Linear Induction Motors With Laterally Asymmetric Secondary for Urban Railway Transit (2020)
Journal Article
Lv, G., Zeng, D., Zhou, T., & Degano, M. (2021). A Complete Equivalent Circuit for Linear Induction Motors With Laterally Asymmetric Secondary for Urban Railway Transit. IEEE Transactions on Energy Conversion, 36(2), 1014-1022. https://doi.org/10.1109/tec.2020.3026334

Since the linear induction motor commonly work with a laterally asymmetric secondary as it is applied to pull rail vehicles, this paper presents a complete equivalent circuit model considering the asymmetry to predict thrust, vertical and transversal... Read More about A Complete Equivalent Circuit for Linear Induction Motors With Laterally Asymmetric Secondary for Urban Railway Transit.

Impact of Star Connection Layouts on the Control of Multiphase Induction Motor Drives Under Open-Phase Fault (2020)
Journal Article
Sala, G., Mengoni, M., Rizzoli, G., Degano, M., Zarri, L., & Tani, A. (2021). Impact of Star Connection Layouts on the Control of Multiphase Induction Motor Drives Under Open-Phase Fault. IEEE Transactions on Power Electronics, 36(4), 3717-3726. https://doi.org/10.1109/tpel.2020.3024205

This paper presents a post-fault control algorithm that minimizes the stator Joule losses in multiphase induction machines under an open-phase fault and for different star connection layouts. The key novelty is that the algorithm can be applied to an... Read More about Impact of Star Connection Layouts on the Control of Multiphase Induction Motor Drives Under Open-Phase Fault.

A Multiport Power Conversion System for the More Electric Aircraft (2020)
Journal Article
Gu, C., Yan, H., Yang, J., Sala, G., De Gaetano, D., Wang, X., …Buticchi, G. (2020). A Multiport Power Conversion System for the More Electric Aircraft. IEEE Transactions on Transportation Electrification, 6(4), 1707-1720. https://doi.org/10.1109/TTE.2020.3019446

In more electric aircraft (MEA), weight reduction and energy efficiency constitute the key figures. In addition, the safety and continuity of operation of its electrical power distribution system (EPDS) are of critical importance. These sets of desir... Read More about A Multiport Power Conversion System for the More Electric Aircraft.

Rotor Position Tracking Control for Low Speed Operation of Direct-Drive PMSM Servo System (2020)
Journal Article
Bu, F., Xuan, F., Yang, Z., Gao, Y., Pan, Z., Degano, M., & Gerada, C. (2021). Rotor Position Tracking Control for Low Speed Operation of Direct-Drive PMSM Servo System. IEEE/ASME Transactions on Mechatronics, 26(2), 1129-1139. https://doi.org/10.1109/tmech.2020.3019039

In this paper, a rotor position tracking control (RPTC) strategy is proposed to effectively reduce the speed fluctuation for a direct-drive permanent magnet synchronous motor (DD-PMSM) servo system operating at low speed with different torque disturb... Read More about Rotor Position Tracking Control for Low Speed Operation of Direct-Drive PMSM Servo System.

Multi-Sector Windings For Bearing Relief E-Machine: Saturation and Cross Coupling Effects (2020)
Conference Proceeding
Mahmoud, H., Valente, G., Degano, M., Nardo, M. D., Gerada, C., & James, B. (2020). Multi-Sector Windings For Bearing Relief E-Machine: Saturation and Cross Coupling Effects. . https://doi.org/10.1109/icem49940.2020.9270761

The key driving elements for any electrical machine (EM) used in aerospace and other safety critical applications are the reliability, mass, volume, and efficiency. To reduce mass/volume while satisfying the power required, the option is to increase... Read More about Multi-Sector Windings For Bearing Relief E-Machine: Saturation and Cross Coupling Effects.

Rotor Design Optimization of Squirrel Cage Induction Motor - Part I: Problem Statement (2020)
Journal Article
Marfoli, A., Di Nardo, M., Degano, M., Gerada, C., & Chen, W. (2021). Rotor Design Optimization of Squirrel Cage Induction Motor - Part I: Problem Statement. IEEE Transactions on Energy Conversion, 36(2), 1271-1279. https://doi.org/10.1109/tec.2020.3019934

Squirrel cage induction motor is the most widely adopted electrical machine in applications directly fed by the main grid. The analysis, design and optimization of this machine topology has been addressed by a considerable amount of literature over t... Read More about Rotor Design Optimization of Squirrel Cage Induction Motor - Part I: Problem Statement.

Advantages of a Double Three-Phase Winding Layout for a Dual Rotor E-Bike Motor Considering Third Current Harmonic Injection Technique (2020)
Conference Proceeding
Gaetano, D. D., Golovanov, D., Sala, G., Galassini, A., Degano, M., Mahmoud, H., & Gerada, C. (2020). Advantages of a Double Three-Phase Winding Layout for a Dual Rotor E-Bike Motor Considering Third Current Harmonic Injection Technique. In 2020 IEEE Transportation Electrification Conference & Expo (ITEC) (1159-1164). https://doi.org/10.1109/itec48692.2020.9161620

The transportation electrification process is rapidly demanding for drivers with enhanced performance. Modern systems are moving from fossil fuel technologies toward hybrid and fully electric solutions. Consequently, in automotive and motorcycle sect... Read More about Advantages of a Double Three-Phase Winding Layout for a Dual Rotor E-Bike Motor Considering Third Current Harmonic Injection Technique.

A Homothetic Scaling Criteria for Synchronous Reluctance Machines Design (2020)
Journal Article
Murataliyev, M., Degano, M., Di Nardo, M., Prystupa, D., Shuo, W., Buticchi, G., …Galea, M. (2021). A Homothetic Scaling Criteria for Synchronous Reluctance Machines Design. IEEE Transactions on Energy Conversion, 36(1), 547-559. https://doi.org/10.1109/tec.2020.3011514

This paper proposes a concept for homothetic scaling of Synchronous Reluctance (SynRel) machines with the aim to generate a design for a wide range of power ratings. A generalized modeling approach, based on the saliency ratio, is presented in detail... Read More about A Homothetic Scaling Criteria for Synchronous Reluctance Machines Design.

A Digital Internal Model Current Controller for Salient Machines (2020)
Journal Article
Petric, I. Z., Vukosavic, S. N., DEgano, M., & Galassini, A. (2021). A Digital Internal Model Current Controller for Salient Machines. IEEE Transactions on Industrial Electronics, 68(6), 4703-4717. https://doi.org/10.1109/tie.2020.2988234

The performance of anisotropic electrical machines is strongly dependent on the current loop characteristics. The problems for achieving robustness and fast response, without overshoot and oscillations, are mainly related to different values and beha... Read More about A Digital Internal Model Current Controller for Salient Machines.

A Novel Sizing Approach for Synchronous Reluctance Machines (2020)
Journal Article
Murataliyev, M., Degano, M., & Galea, M. (2021). A Novel Sizing Approach for Synchronous Reluctance Machines. IEEE Transactions on Industrial Electronics, 68(3), 2083-2095. https://doi.org/10.1109/tie.2020.2975461

This paper presents a simple analytical model for the sizing of Synchronous Reluctance (SynRel) machines. The accuracy of the method is achieved by modelling a simple rotor geometry that presents all the characteristics of a real machine. The analyti... Read More about A Novel Sizing Approach for Synchronous Reluctance Machines.

High-Speed Electric Drives: A Step Towards System Design (2020)
Journal Article
Savi, F., Barater, D., Nardo, M. D., Degano, M., Gerada, C., Wheeler, P., & Buticchi, G. (2020). High-Speed Electric Drives: A Step Towards System Design. IEEE Open Journal of the Industrial Electronics Society, 1, 10-21. https://doi.org/10.1109/ojies.2020.2973883

Electric drives applications have been worldwide adopted for the transportation electrification. An electric drive system is constituted by two main components: the power electronics converter and the electrical machine. Traditionally the design work... Read More about High-Speed Electric Drives: A Step Towards System Design.

Speed Ripple Reduction of Direct-Drive PMSM Servo System at Low-Speed Operation Using Virtual Cogging Torque Control Method (2020)
Journal Article
Bu, F., Yang, Z., Gao, Y., Pan, Z., Pu, T., Degano, M., & Gerada, C. (2021). Speed Ripple Reduction of Direct-Drive PMSM Servo System at Low-Speed Operation Using Virtual Cogging Torque Control Method. IEEE Transactions on Industrial Electronics, 68(1), 160-174. https://doi.org/10.1109/tie.2019.2962400

This paper presents a virtual cogging torque (VCT) control method to reduce the speed ripple of direct-drive permanent magnet synchronous machine (DD-PMSM) servo system under low-speed conditions. Compared with other factors, at low speeds, the coggi... Read More about Speed Ripple Reduction of Direct-Drive PMSM Servo System at Low-Speed Operation Using Virtual Cogging Torque Control Method.

SMART: Modular Architecture for Reliable Transportation (2019)
Conference Proceeding
Papadopoulos, S., Galassini, A., Ruksnaitis, L., Farhat, N., Kiselychnyk, O., Midgley, W., & Degano, M. (2019). SMART: Modular Architecture for Reliable Transportation. In IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society (7135-7140). https://doi.org/10.1109/IECON.2019.8926931

This paper proposes a new ultra-reliable architecture for fully electric propulsion primarily aimed at the automotive sector. The system considers a direct drive arrangement, minimizing the number of moving components and is based on a network of mul... Read More about SMART: Modular Architecture for Reliable Transportation.

Advantages of Communication in Double Three-Phase Surface Permanent Magnet Machines Fed by Independent Inverters (2019)
Conference Proceeding
Sala, G., Mengoni, M., Tani, A., Galassini, A., & Degano, M. (2019). Advantages of Communication in Double Three-Phase Surface Permanent Magnet Machines Fed by Independent Inverters. In 2019 21st European Conference on Power Electronics and Applications (EPE '19 ECCE Europe)https://doi.org/10.23919/EPE.2019.8915155

This paper deals with a double three-phase Surface Permanent Magnet (SPM) drive where two independent three-phase inverters are supplying the same electrical machine. This work highlights how the magnetic coupling of the two windings affects the cont... Read More about Advantages of Communication in Double Three-Phase Surface Permanent Magnet Machines Fed by Independent Inverters.

Optimized Sizing of IPM Machines for Automotive Traction Application (2019)
Conference Proceeding
Valente, G., Gerada, D., Degano, M., Gerada, C., Foulsham, J., & Beeby, D. (2019). Optimized Sizing of IPM Machines for Automotive Traction Application. In 2019 IEEE International Electric Machines & Drives Conference (IEMDC) (970-975). https://doi.org/10.1109/IEMDC.2019.8785245

This paper presents the implementation of an electrical machine design tool including its overall architecture. The tool is flexible and can be employed for the sizing of any permanent magnet synchronous machine. The case study considered in this wor... Read More about Optimized Sizing of IPM Machines for Automotive Traction Application.

A Novel Concept of Ribless Synchronous Reluctance Motor for Enhanced Torque Capability (2019)
Journal Article
Bao, Y., Degano, M., Wang, S., Chuan, L., Xu, Z., Zhang, H., & Gerada, C. (2020). A Novel Concept of Ribless Synchronous Reluctance Motor for Enhanced Torque Capability. IEEE Transactions on Industrial Electronics, 67(4), 2553-2563. https://doi.org/10.1109/tie.2019.2914616

The rotor structure of synchronous reluctance machines (SynRel) is conventionally retained mechanically by iron ribs. In this paper a novel structure for high speed synchronous reluctance rotor is presented. The novelty of this work is the proof of a... Read More about A Novel Concept of Ribless Synchronous Reluctance Motor for Enhanced Torque Capability.

Control Strategy for Five-Phase Dual-Stator Winding Induction Starter/Generator System (2019)
Journal Article
Liu, H., Bu, F., Huang, W., Liu, L., Hu, Y., Degano, M., & Gerada, C. (2020). Control Strategy for Five-Phase Dual-Stator Winding Induction Starter/Generator System. IEEE Transactions on Industrial Electronics, 67(4), 2607-2617 . https://doi.org/10.1109/TIE.2019.2912767

This paper presents an integrated control strategy for a starter/generator (S/G) system based on five-phase dual-stator winding induction machine (FPDWIM). The FPDWIM has a cage-type rotor and two sets of stator windings. One is a five-phase control... Read More about Control Strategy for Five-Phase Dual-Stator Winding Induction Starter/Generator System.

Post -Fault Compensation Control Strategy for Multi-Three-Phase PMSM under Open-Circuit and Short-Circuit Condition (2019)
Conference Proceeding
Rahman, A. A., Galassini, A., Degano, M., Abbas, H., & Bozhko, S. (2019). Post -Fault Compensation Control Strategy for Multi-Three-Phase PMSM under Open-Circuit and Short-Circuit Condition. In Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) (121-127). https://doi.org/10.1109/WEMDCD.2019.8887854

This paper presents two post-fault compensation strategies for the distributed current control of a nine-phase Permanent-Magnet Synchronous Machine (PMSM). The dynamic performance in faulty condition is guaranteed by keeping the current loop bandwidt... Read More about Post -Fault Compensation Control Strategy for Multi-Three-Phase PMSM under Open-Circuit and Short-Circuit Condition.

An accurate wide-speed range control method of IPMSM considering resistive voltage drop and magnetic saturation (2019)
Journal Article
Gerada, C., Galassini, A., Degano, M., Kang, J., & Wang, S. (2020). An accurate wide-speed range control method of IPMSM considering resistive voltage drop and magnetic saturation. IEEE Transactions on Industrial Electronics, 67(4), 2630-2641 . https://doi.org/10.1109/TIE.2019.2912766

This paper deals with the high accurate current set-points solution for Interior Permanent-Magnet Synchronous Motors (IPMSM) in wide-speed range applications. Considering voltage and current constraints, the operating regions can be divided into Maxi... Read More about An accurate wide-speed range control method of IPMSM considering resistive voltage drop and magnetic saturation.

Asymmetrical Flux Density Distribution in Stator Teeth of Surface Permanent Magnet Machines (2019)
Conference Proceeding
Sala, G., De Gaetano, D., Degano, M., & Gerada, C. (2019). Asymmetrical Flux Density Distribution in Stator Teeth of Surface Permanent Magnet Machines. In Proceedings - 2019 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) (29-33). https://doi.org/10.1109/WEMDCD.2019.8887831

This work is showing in detail the flux density behaviour in the stator teeth of a synchronous machine. A 3-phase Surface Permanent Magnet (SPM) motor is considered. These motors are widely employed in applications where high efficiency and power den... Read More about Asymmetrical Flux Density Distribution in Stator Teeth of Surface Permanent Magnet Machines.

Considerations on the Development of an Electric Drive for a Secondary Flight Control Electromechanical Actuator (2019)
Journal Article
Giangrande, P., Galassini, A., Papadopoulos, S., Al-Timimy, A., Calzo, G. L., Degano, M., …Galea, M. (2019). Considerations on the Development of an Electric Drive for a Secondary Flight Control Electromechanical Actuator. IEEE Transactions on Industry Applications, 55(4), 3544-3554. https://doi.org/10.1109/tia.2019.2907231

The more electric aircraft concept aims to improve the fuel consumption, the weight, and both the maintenance and operating costs of the aircraft, by promoting the use of electric power in actuation systems. According to this scenario, electromechani... Read More about Considerations on the Development of an Electric Drive for a Secondary Flight Control Electromechanical Actuator.

A resolver-to-digital conversion method based on third-order rational fraction polynomial approximation for PMSM control (2018)
Journal Article
Wang, S., Kang, J., Degano, M., & Buticchi, G. (2018). A resolver-to-digital conversion method based on third-order rational fraction polynomial approximation for PMSM control. IEEE Transactions on Industrial Electronics, 66(8), 6383-6392. https://doi.org/10.1109/TIE.2018.2884209

—In this paper, a cost-effective and highly accurate resolver-to-digital conversion (RDC) method is presented. The core of the idea is to apply a third-order rational fraction polynomial approximation (TRFPA) for the conversion of sinusoidal signals... Read More about A resolver-to-digital conversion method based on third-order rational fraction polynomial approximation for PMSM control.

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. In 2018 IEEE Energy Conversion Congress and Exposition (ECCE) (1640-1647). https://doi.org/10.1109/ECCE.2018.8558292

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 about Synchronous Reluctance Motor Iron Losses: Analytical Model and Optimization.

Design of PMSM for EMA Employed in Secondary Flight Control Systems (2018)
Conference Proceeding
Giangrande, P., Al-Timimy, A., Galassini, A., Papadopoulos, S., Degano, M., & Galea, M. (2018). Design of PMSM for EMA Employed in Secondary Flight Control Systems. In Proceedings - 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC) (1-6). https://doi.org/10.1109/ESARS-ITEC.2018.8607467

© 2018 IEEE. The more electric aircraft (MEA) initiative aims to improve weight, fuel consumption and maintenance costs of the aircraft, by increasing the use of electric power in actuation systems. Considering this scenario, electromechanical actuat... Read More about Design of PMSM for EMA Employed in Secondary Flight Control Systems.

The Influence of Stator Material on the Power Density and Iron Loss of a High-Performace Starter-Generator for More Electric Aircraft (2018)
Conference Proceeding
Golovanov, D., Xu, Z., Gerada, D., Degano, M., Vakil, G., & Gerada, C. (2018). The Influence of Stator Material on the Power Density and Iron Loss of a High-Performace Starter-Generator for More Electric Aircraft. In 2018 21st International Conference on Electrical Machines and Systems (ICEMS) (169-173). https://doi.org/10.23919/ICEMS.2018.8549390

Maximizing the power density as well as efficiency are two of the main critical aspects for engineers who are designing electrical machines for aerospace applications. Iron losses have a significant impact on the total machine efficiency, thermal sta... Read More about The Influence of Stator Material on the Power Density and Iron Loss of a High-Performace Starter-Generator for More Electric Aircraft.

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) (1360-1366). https://doi.org/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 about A Novel Newton-Raphson-Based Searching Method for the MTPA Control of Pmasynrm Considering Magnetic and Cross Saturation.

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. (2019). Enhanced power sharing transient with droop controllers for multi-three-phase synchronous electrical machines. IEEE Transactions on Industrial Electronics, 66(7), 5600-5610. https://doi.org/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 about Enhanced power sharing transient with droop controllers for multi-three-phase synchronous electrical machines.

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. In Proceedings - 2018 XIII International Conference on Electrical Machines (ICEM) (263-269). https://doi.org/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 about Investigation of AC Copper and Iron Losses in High-Speed High-Power Density PMSM.

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.

Design and losses analysis of a high power density machine for flooded pump applications (2018)
Journal Article
Al-Timimy, A., Giangrande, P., Degano, M., Zeyuan, X., Galea, M., Gerada, C., …Xia, L. (2019). Design and losses analysis of a high power density machine for flooded pump applications. IEEE Transactions on Industry Applications, 54(4), 3260-3270. https://doi.org/10.1109/TIA.2018.2821623

This paper describes the design process of a 10 kW 19000 rpm high power density surface mounted permanent magnet synchronous machine for a directly coupled pump application. In order to meet the required specifications, a compact machine, with coolin... Read More about Design and losses analysis of a high power density machine for flooded pump applications.

Influence of rotor endcaps on the electromagnetic performance of high speed PM machine (2018)
Journal Article
Al-Timimy, A., Alani, M., Degano, M., Giangrande, P., Gerada, C., & Galea, M. (2018). Influence of rotor endcaps on the electromagnetic performance of high speed PM machine. IET Electric Power Applications, 12(8), 1142–1149. https://doi.org/10.1049/iet-epa.2017.0811

Surface-mounted permanent magnet (SPM) machines are preferred for high-speed aerospace applications over induction and switched reluctance machines, since they combine the advantages of high torque density and efficiency. Also, in aerospace applicati... Read More about Influence of rotor endcaps on the electromagnetic performance of high speed PM machine.

Synchronous reluctance motor iron losses: considering machine non-linearity at MTPA, FW, and MTPV operating conditions (2018)
Journal Article
Mahmoud, H., Bacco, G., Degano, M., Bianchi, N., & Gerada, C. (2018). Synchronous reluctance motor iron losses: considering machine non-linearity at MTPA, FW, and MTPV operating conditions. IEEE Transactions on Energy Conversion, 33(3), 1402-1410. https://doi.org/10.1109/TEC.2018.2811543

Synchronous reluctance machine has high flux density fluctuations in the iron due to the high harmonics results from the rotor anisotropy. Thus, an accurate computation of the iron losses is of paramount importance, especially during the design stage... Read More about Synchronous reluctance motor iron losses: considering machine non-linearity at MTPA, FW, and MTPV operating conditions.

Considerations on the effects that core material machining has on an electrical machine's performance (2018)
Journal Article
Al-Timimy, A., Vakil, G., Degano, M., Giangrande, P., Gerada, C., & Galea, M. (2018). Considerations on the effects that core material machining has on an electrical machine's performance. IEEE Transactions on Energy Conversion, 33(3), 1154-1163. https://doi.org/10.1109/TEC.2018.2808041

An often-overlooked aspect during the development process of electrical machines, is the validity and accuracy of the machine material properties being used at the design stage. Designers usually consider the data provided by the materials supplier,... Read More about Considerations on the effects that core material machining has on an electrical machine's performance.

The impact of impulsive voltage waveforms on the electrical insulation of actuators for more electrical aircraft (MEA) (2017)
Conference Proceeding
Cavallini, A., Lusaurdi, L., & Degano, M. (in press). The impact of impulsive voltage waveforms on the electrical insulation of actuators for more electrical aircraft (MEA).

To reduce the size and weight of aircraft actuators, wide band-gap semiconductor devices (SiC and GaN) are the most promising solution. These devices have switching times well below those of silicon devices. Very short rise times may enhance the elec... Read More about The impact of impulsive voltage waveforms on the electrical insulation of actuators for more electrical aircraft (MEA).

A system level comparison of drive topologies for high speed electrical machines (2017)
Conference Proceeding
Savi, F., Barater, D., Di Nardo, M., Degano, M., & Gerada, C. (2017). A system level comparison of drive topologies for high speed electrical machines.

This paper presents a comprehensive comparative study among five different converter topologies all designed to drive a 8.5kW-120krpm surface permanent magnet synchronous machine. The study aims at comparing the considered systems in terms of convert... Read More about A system level comparison of drive topologies for high speed electrical machines.

Axial eccentric SynRel and SPM motors analytical models validation using 3D finite element (2017)
Conference Proceeding
Mahmoud, H., Al-Timimy, A., Degano, M., Di Nardo, M., Bianchi, N., & Gerada, C. (2017). Axial eccentric SynRel and SPM motors analytical models validation using 3D finite element. In Proceedings of the 2017 - IEEE 11th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives, SDEMPED 2017 (38-44). https://doi.org/10.1109/DEMPED.2017.8062331

This paper deals with the uniform and non-uniform axial eccentricity analyses of the surface mounted permanent magnet and synchronous reluctance machines. The analyses are carried out using an analytical model for each considered machine. Being the a... Read More about Axial eccentric SynRel and SPM motors analytical models validation using 3D finite element.

Holistic electrical machine optimization for system integration (2017)
Conference Proceeding
Gerada, D., Golovanov, D., Xu, Z., Papini, L., Degano, M., Zhang, H., & Gerada, C. (2017). Holistic electrical machine optimization for system integration. In 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia) (980-985). https://doi.org/10.1109/IFEEC.2017.7992174

The power density of electrical machines required for transport applications 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 optimization of electrica... Read More about Holistic electrical machine optimization for system integration.

Comparative study of permanent magnet-synchronous and permanent magnet-flux switching machines for high torque to inertia applications (2017)
Conference Proceeding
Al-Timimy, A., Giangrande, P., Degano, M., Galea, M., & Gerada, C. (2017). Comparative study of permanent magnet-synchronous and permanent magnet-flux switching machines for high torque to inertia applications. In Proceedings - 2017 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) (45-51). https://doi.org/10.1109/WEMDCD.2017.7947722

This paper investigates the capability of both permanent magnet synchronous machine (PMSM) and permanent magnet flux switching (PMFS) machine to provide high torque to inertia ratio for applications with demanding response in terms of acceleration an... Read More about Comparative study of permanent magnet-synchronous and permanent magnet-flux switching machines for high torque to inertia applications.

Sensitivity analysis for performance and power density improvements in salient-pole synchronous generators (2017)
Conference Proceeding
Wang, Y., Vakil, G., Nuzzo, S., Degano, M., Galea, M., Gerada, C., …Brown, N. (2017). Sensitivity analysis for performance and power density improvements in salient-pole synchronous generators. In Proceedings - 2017 IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD) (163-168). https://doi.org/10.1109/WEMDCD.2017.7947741

Objective of this paper is to provide design recommendations to improve the performance and power density of a 400kVA salient-pole synchronous generator, without exceeding the limitations due to critical parameters such as total harmonic distortion o... Read More about Sensitivity analysis for performance and power density improvements in salient-pole synchronous generators.

History and recent advancements of electric propulsion and integrated electrical power systems for commercial & naval vessels (2016)
Conference Proceeding
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.

Trade-off analysis and design of a high power density PM machine for flooded industrial pump (2016)
Conference Proceeding
Al-Timimy, A., Degano, M., Xu, Z., Lo Calzo, G., Giangrande, P., Galea, M., …Zhang, H. (2016). Trade-off analysis and design of a high power density PM machine for flooded industrial pump.

This paper presents the trade-off analysis and design of a high power-density machine for industrial pump applications. The developed permanent magnet synchronous machine drives an electric, oil flooded pump. Different slot/pole combination and windi... Read More about Trade-off analysis and design of a high power density PM machine for flooded industrial pump.

Improved damper cage design for salient-pole synchronous generators (2016)
Journal Article
Nuzzo, S., Degano, M., Galea, M., Gerada, C., Gerada, D., & Brown, N. (2017). Improved damper cage design for salient-pole synchronous generators. IEEE Transactions on Industrial Electronics, 64(3), 1958-1970. https://doi.org/10.1109/TIE.2016.2619321

© 2016 IEEE. The benefits of implementing a damper winding in salient-pole synchronous generators are widely known and well consolidated. It is also well known that such a winding incurs extra losses in the machine due to a number of reasons. In orde... Read More about Improved damper cage design for salient-pole synchronous generators.

Thermal management of a permanent magnet motor for an directly coupled pump (2016)
Conference Proceeding
Xu, Z., Al-Timimy, A., Degano, M., Giangrande, P., Lo Calzo, G., Zhang, H., …Gerada, C. (2016). Thermal management of a permanent magnet motor for an directly coupled pump.

A high speed permanent magnet motor is designed for a flooded industrial pump. Oil in the pump is used to cool the motor. Due to the limitation of space and mass requirement for the application, thermal management is one of the main challenges. This... Read More about Thermal management of a permanent magnet motor for an directly coupled pump.

Distributed current control for multi-three phase synchronous machines in fault conditions (2016)
Conference Proceeding
Galassini, A., Costabeber, A., Degano, M., Gerada, C., Tessarolo, A., & Castellan, S. (2016). Distributed current control for multi-three phase synchronous machines in fault conditions.

Among challenges and requirements of on-going electrification process and future transportation systems there is demand for arrangements with both increased fault tolerance and reliability. Next aerospace, power-train and automotive systems exploitin... Read More about Distributed current control for multi-three phase synchronous machines in fault conditions.

Design and optimization of a high power density machine for flooded industrial pump (2016)
Conference Proceeding
Al-Timimy, A., Degano, M., Giangrande, P., Lo Calzo, G., Xu, Z., Galea, M., …Xia, L. (2016). Design and optimization of a high power density machine for flooded industrial pump.

This paper presents the design optimization procedure of a high power-density, permanent magnet synchronous machine for industrial pump applications. The designed machine drives an electric, oil flooded pump. In order to achieve higher torque-density... Read More about Design and optimization of a high power density machine for flooded industrial pump.

Selection criteria and robust optimization of a traction PM-Assisted Synchronous Reluctance motor (2015)
Journal Article
Degano, M., Carraro, M., & Bianchi, N. (2015). Selection criteria and robust optimization of a traction PM-Assisted Synchronous Reluctance motor. IEEE Transactions on Industry Applications, 51(6), https://doi.org/10.1109/TIA.2015.2443091

In the coming years, the electrification and the deployment of the electric motors in the urban transports will become a more and more widespread reality. The optimization stage of the electric motors usually does not consider in detail the real driv... Read More about Selection criteria and robust optimization of a traction PM-Assisted Synchronous Reluctance motor.

Sensitivity Analysis of Torque Ripple Reduction of Synchronous Reluctance and Interior PM Motors (2014)
Journal Article
Bianchi, N., Degano, M., & Fornasiero, E. (2015). Sensitivity Analysis of Torque Ripple Reduction of Synchronous Reluctance and Interior PM Motors. IEEE Transactions on Industry Applications, 51(1), 187-195. https://doi.org/10.1109/TIA.2014.2327143

The main drawback of reluctance machines is a high torque ripple, due to the interaction between the stator magnetomotive force and the rotor structure. Adopting a rotor configuration characterized by several flux barriers per pole, there is a high i... Read More about Sensitivity Analysis of Torque Ripple Reduction of Synchronous Reluctance and Interior PM Motors.