High Speed Permanent Magnet Assisted Synchronous Reluctance Machine - Part II: Performance Boundaries

Di Nardo, Mauro; Gallicchio, Gianvito; Palmieri, Marco; Marfoli, Alessandro; Degano, Michele; Gerada, Chris; Cupertino, Francesco

Abstract

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 synchronous reluctance machine (PMaSyRM) can be optimized to satisfy all the electromagnetic and structural constraints arising as the maximum operating speed increases. This is done considering a variety PMs material. This work, the second of two companion papers, briefly recalls the novel systematic design approach proposed in Part I, and then describes the characteristics of the optimal machines achieved considering a maximum speed ranging from 1 to 140 krpm with and without the assistance of ferrite and neodymium based PMs. The reasons behind the performance deterioration as the speed increases are all investigated along with the geometrical variations of the optimal designs. The selection of the design solution to be manufactured is justified as well as the final structural and electromagnetic refinement stages leading to the final prototype. All the reported considerations are experimentally validated testing an 8.5kW at 80krpm PMaSyRM, comparing the measured and expected performance in terms of torque and internal power factor.

Citation

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

• Journal Article Type: Article
• Acceptance Date: May 14, 2022
• Online Publication Date: May 20, 2022
• Publication Date: 2022-12
• Deposit Date: Jul 7, 2022
• Publicly Available Date: May 21, 2024
• Journal: IEEE Transactions on Energy Conversion
• Print ISSN: 0885-8969
• Electronic ISSN: 1558-0059
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• Peer Reviewed: Peer Reviewed
• Volume: 37
• Issue: 4
• Pages: 2567-2577
• DOI: https://doi.org/10.1109/tec.2022.3176383
• Keywords: Electrical and Electronic Engineering; Energy Engineering and Power Technology
• Public URL: https://nottingham-repository.worktribe.com/output/8853911
• Publisher URL: https://ieeexplore.ieee.org/document/9779436