Modal analysis and rotor-dynamics of an interior permanent magnet synchronous motor : an experimental and theoretical study

Čorović, Selma (author), Miljavec, Damijan (author)

This paper investigates mechanical vibrations of an interior permanent magnet (IPM) synchronous electrical motor designed for a wide range of speeds by virtue of the modal and rotordynamic theory. Mechanical vibrations of the case study IPM motor components were detected and analyzed via numerical, analytical and experimental investigation. First, a finite element-based model of the stator assembly including windings was set up and validated with experimental and analytical results. Second, the influence of the presence of the motor housing on the natural frequencies of the stator and windings was investigated by virtue of numerical modal analysis. The experimental and numerical modal analyses were further carried out on the IPM rotor configuration. The results show that the natural frequencies of the IPM rotor increase due to the presence of the magnets. Finally, detailed numerical rotordynamic analysis was performed in order to investigate the most critical speeds of the IPM rotor with bearings. Based on the obtained results, the key parameters related to mechanical vibrations response phenomena, which are important when designing electrical motors with interior permanent magnets, are provided. The main findings reported here can be used for experimental and theoretical mechanical vibration analysis of other types of rotating electrical machines.

• Language: English
• Keywords: electrical machines, IPM motor, machine design, mechanical vibrations, gyroscopic effect, critical speed, numerical modeling, finite element method
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 25 str.
• Numbering: Vol. 10, iss. 17, art. 5881
• PID: 20.500.12556/RUL-134232
• UDC: 621.31
• ISSN on article: 2076-3417
• DOI: 10.3390/app10175881
• COBISS.SI-ID: 26164995
• Publication date in RUL: 03.01.2022

Record is a part of a journal

• Title: Applied sciences
• Shortened title: Appl. sci.
• Publisher: MDPI
• ISSN: 2076-3417
• COBISS.SI-ID: 522979353

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 01.09.2020

Secondary language

• Language: Slovenian
• Keywords: električni stroji, električni motor s trajnimi magneti, načrtovanje električnih strojev, mehanske vibracije, žiroskopski učinek, kritične hitrosti, numerično modeliranje, metoda končnih elementov

Projects

• Funder: EC - European Commission
• Funding programme: H2020
• Project number: 769506
• Name: Optimization of scalaBle rEaltime modeLs and functIonal testing for e-drive ConceptS
• Acronym: OBELICS