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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.

Open and Short Circuit Post-Fault Control Strategies for Multi-Three-Phase Interior Permanent Magnet Machines (2021)
Journal Article
Abdul Rahman, A., Galassini, A., Degano, M., Buticchi, G., Cristian Pesce, G., Gerada, C., Bozhko, S., & Almurib, H. A. (2022). Open and Short Circuit Post-Fault Control Strategies for Multi-Three-Phase Interior Permanent Magnet Machines. IEEE Transactions on Energy Conversion, 37(1), 163-174. https://doi.org/10.1109/tec.2021.3090982

This paper presents a post-fault current control strategy for dual three-phase Interior Permanent Magnet (IPM) synchronous machines. The current controllers are designed based on the Vector Space Decomposition (VSD) algorithm. This take into account... Read More about Open and Short Circuit Post-Fault Control Strategies for Multi-Three-Phase Interior Permanent Magnet Machines.

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., Bianchi, N., Galea, M., & 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.

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., Xu, Z., Rocca, A. L., Galassini, A., Tarisciotti, L., Eastwick, C. N., Pickering, S. J., Wheeler, P., Clare, J., Filipenko, M., & 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.

Analysis and Performance of Five-Phase Piecewise-Random-Switching-Frequency Space Vector Pulse Width Modulation (2020)
Journal Article
Bu, F., Liu, Q., Pu, T., Zhao, Y., Ma, B., Ma, C., Degano, M., & Gerada, C. (2021). Analysis and Performance of Five-Phase Piecewise-Random-Switching-Frequency Space Vector Pulse Width Modulation. IEEE Transactions on Energy Conversion, 36(3), 2339-2347. https://doi.org/10.1109/tec.2020.3046835

In order to better address the problem of many high-order harmonics' concentration in the output voltage, a novel five-phase piecewise-random-switching-frequency space vector pulse width modulation (PRSF-SVPWM) strategy is proposed for a five-phase v... Read More about Analysis and Performance of Five-Phase Piecewise-Random-Switching-Frequency Space Vector Pulse Width Modulation.

Analysis and Design of Dual-Rotor Synchronous Reluctance Machine (2020)
Journal Article
Alani, M., Degano, M., Bianchi, N., Mahmoud, H., & Gerada, C. (2021). Analysis and Design of Dual-Rotor Synchronous Reluctance Machine. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(4), 4376-4383. https://doi.org/10.1109/jestpe.2020.3047404

To push the synchronous reluctance machine toward higher power densities to meet the requirement of automotive applications, a double-rotor (DR) synchronous reluctance topology has been thoroughly analyzed, designed, and investigated by means of fini... Read More about Analysis and Design of Dual-Rotor Synchronous Reluctance Machine.

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., Galea, M., & 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.

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., Golovanov, D., Gerada, D., Xu, Z., La Rocca, A., Eastwick, C. N., Pickering, S. J., Wheeler, P., Clare, J. C., & 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.

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., Buticchi, G., & 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.

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.

Rotor Design Optimization of Squirrel Cage Induction Motor - Part II: Results Discussion (2020)
Journal Article
Nardo, M. D., Marfoli, A., Degano, M., Gerada, C., & Chen, W. (2021). Rotor Design Optimization of Squirrel Cage Induction Motor - Part II: Results Discussion. IEEE Transactions on Energy Conversion, 36(2), 1280-1288. https://doi.org/10.1109/tec.2020.3020263

The rotor slot geometry of a squirrel cage induction motor plays the most important role in defining the torque-speed characteristic when the power supply is directly provided by the main grid. In this article it is shown how the rotor slot geometry... Read More about Rotor Design Optimization of Squirrel Cage Induction Motor - Part II: Results Discussion.

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., Galassini, A., Degano, M., Zhang, 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.

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.

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., Zhang, H., Gerada, C., & 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.

Four-Degree-of-Freedom Overmodulation Strategy for Five-Phase Space Vector Pulsewidth Modulation (2020)
Journal Article
Bu, F., Pu, T., Liu, Q., Ma, B., Degano, M., & Gerada, C. (2021). Four-Degree-of-Freedom Overmodulation Strategy for Five-Phase Space Vector Pulsewidth Modulation. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(2), 1578-1590. https://doi.org/10.1109/jestpe.2020.2992659

This article proposes a four-degree-of-freedom overmodulation strategy for five-phase space vector pulsewidth modulation (SVPWM) in order to reduce the low-order harmonics of the output voltage during overmodulation. Based on the nearest-four-vector... Read More about Four-Degree-of-Freedom Overmodulation Strategy for Five-Phase Space Vector Pulsewidth Modulation.