Comparative Analysis of the Effect of Rotor Faults in the Performance of Low-Speed High-Torque Machines
Source abstract
Abstract
Several studies have focused on modeling and analyzing the impact of rotor faults in conventional low-pole-count machines, while related research on low-speed high-torque (LSHT) machines with a high pole count remains limited. In these machines, the combination of low speed, high inertia, and high torque levels presents a critical application for advanced diagnosis techniques. The present paper aims to describe and quantify the impact of rotor faults on the performance of LSHT machine types during the design stage. Specifically, 10-pole and 16-pole synchronous reluctance machines (SynRMs), permanent magnet synchronous machines (PMSMs), and squirrel-cage induction machines (SCIMs) are assessed by means of detailed 2D simulations. The effects of eccentricity, broken rotor bars, and partial demagnetization are studied, with a focus on performance variations. The results show that LSHT PMSMs are not significantly affected by the partial demagnetization of a few magnets, and the same holds true for common faults in SynRMs and SCIMs. Nonetheless, a significant increase in torque ripple was observed for all evaluated faults, with different origins and diverse effects on the torque waveform, which could be hard or invasive to analyze. Furthermore, it was concluded that specialized diagnosis techniques are effectively required for detecting the usual faults in LSHT machines, as their effect on major performance indicators is mostly minimal.
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Research context
OpenAlex topics: Engineering Diagnostics and Reliability · Engineering Technology and Methodologies · Mechanical Systems and Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Electrical Engineering, University of Concepcion, Concepcion 4070386, Chile
Power Electronics, Machines, and Control Research Institute, University of Nottingham, Nottingham NG7 2RD, UK
Instituto Tecnológico de la Energía, Universitat Politècnica de València, 46022 Valencia, Spain
Funding
AGENCIA NACIONAL DE INVESTIGACION Y DESARROLLO · Spanish ‘Ministerio de Ciencia e Innovación’ · Agencia Estatal de Investigación and FEDER program · “Plan Estatal de Investigación Científica, Técnica e Innovación 2021-2023”
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