Fast and accurate non-linear time-domain modeling of synchronous machines

Vukotić, Mario (author), Diwoky, Franz (author), Mohr, Martin (author), Miljavec, Damijan (author)

The paper presents a novel method for non-linear 2D magnetic analyses of synchronous electric machines, with the emphasis on permanent magnet and synchronous reluctance AC machines with distributed windings. The foundation of the methodology lies in the air gap magnetic flux being an integral quantity, connecting the two magnetic structures – stator and rotor. The implementation was done through the fixed magnetic permeance configuration. In the method, the rotor and stator sub-models of different complexity were developed, that iteratively exchange the results between each other via the frozen permeability method, until a sufficient accuracy is achieved. Each of the sub-models can have an arbitrary number of nodes for scalar magnetic potentials, in order to accurately describe the magnetic conditions. However, we showed in the paper that only a small number of nodes in both sub-models is sufficient to achieve the accuracy of the results, comparable with the 2D finite element method results. The small number of nodes reflects in the reduced computational efforts of the presented method, giving it a promising forecast for numerous analyses, e.g. for calculations of voltage forms, inductances, armature reaction effects, iron loss estimations, etc. and further, for various optimization procedures.

• Language: English
• Keywords: electromagnetism, electric machines, frozen permeability, magnetic analysis, magnetic equivalent circuit, permeance configuration, synchronous machines, permanent magnets
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: Str. 26289-26303
• Numbering: Vol. 13
• PID: 20.500.12556/RUL-167351
• UDC: 621.313/.314
• ISSN on article: 2169-3536
• DOI: 10.1109/ACCESS.2025.3539780
• COBISS.SI-ID: 226213379
• Publication date in RUL: 17.02.2025

Record is a part of a journal

• Title: IEEE access
• Publisher: Institute of Electrical and Electronics Engineers
• ISSN: 2169-3536
• COBISS.SI-ID: 519839513

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: elektromagnetika, električni stroji, zamrznjena permabilnost, magnetna analiza, magnetno nadomestno vezje, permeančna konfiguracija, sinhronski stroji, trajni magneti

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: L2-50084
• Name: Celostno načrtovanje in eksperimentalno modeliranje električnih motorjev