Investigation of a Variable Flux PMSM with Mechanical Modulators between the Rotor Poles

Gabriel Weissitsch; Thomas Krainer; Edmund Marth; Gerd Bramerdorfer; Markus Peer

doi:10.1109/IEMDC60492.2025.11061048

Investigation of a Variable Flux PMSM with Mechanical Modulators between the Rotor Poles

Gabriel Weissitsch^*
, Thomas Krainer^*
, Edmund Marth^*
, Gerd Bramerdorfer^*
, Markus Peer^*

^*Corresponding author for this work

Institute of Electrical Drives and Power Electronics

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings › peer-review

Abstract

This work aims to investigate the characteristics and potential of a permanent magnet synchronous machine (PMSM) utilizing movable elements in the rotor core between the magnets to vary the rotor flux linkage. The geometry of the machine under investigation is presented, and the flux reduction principle is described in detail. The characteristics of the variable flux machine (VFM) is compared to a conventional PMSM with internal magnets to identify the benefits and drawbacks in terms of efficiency. An analytical approach demonstrates the
dependency of the flux reduction on specific machine parameters. A mechanical stress simulation is performed to show that the machine can withstand the forces acting on it. Lastly, an option to apply the flux reduction concept to a surface-mounted permanent magnet (SPM) machine is presented.

Original language	English
Title of host publication	2025 IEEE International Electric Machines & Drives Conference (IEMDC)
Subtitle of host publication	IEMDC, Houston, Texas, May 18-21, 2025
Pages	16-21
Number of pages	6
Edition	1
ISBN (Electronic)	9798350376593
DOIs	https://doi.org/10.1109/IEMDC60492.2025.11061048
Publication status	Published - 2025

Publication series

Name	International Electric Machines and Drives Conference, IEMDC 2025

Fields of science

202027 Mechatronics
202011 Electrical machines
202 Electrical Engineering, Electronics, Information Engineering
202025 Power electronics
202009 Electrical drive engineering

JKU Focus areas

Sustainable Development: Responsible Technologies and Management
Digital Transformation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1109/IEMDC60492.2025.11061048

Cite this

Weissitsch, G., Krainer, T., Marth, E., Bramerdorfer, G., & Peer, M. (2025). Investigation of a Variable Flux PMSM with Mechanical Modulators between the Rotor Poles. In 2025 IEEE International Electric Machines & Drives Conference (IEMDC): IEMDC, Houston, Texas, May 18-21, 2025 (1 ed., pp. 16-21). (International Electric Machines and Drives Conference, IEMDC 2025). https://doi.org/10.1109/IEMDC60492.2025.11061048

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title = "Investigation of a Variable Flux PMSM with Mechanical Modulators between the Rotor Poles",

abstract = "This work aims to investigate the characteristics and potential of a permanent magnet synchronous machine (PMSM) utilizing movable elements in the rotor core between the magnets to vary the rotor flux linkage. The geometry of the machine under investigation is presented, and the flux reduction principle is described in detail. The characteristics of the variable flux machine (VFM) is compared to a conventional PMSM with internal magnets to identify the benefits and drawbacks in terms of efficiency. An analytical approach demonstrates the dependency of the flux reduction on specific machine parameters. A mechanical stress simulation is performed to show that the machine can withstand the forces acting on it. Lastly, an option to apply the flux reduction concept to a surface-mounted permanent magnet (SPM) machine is presented.",

author = "Gabriel Weissitsch and Thomas Krainer and Edmund Marth and Gerd Bramerdorfer and Markus Peer",

year = "2025",

doi = "10.1109/IEMDC60492.2025.11061048",

language = "English",

series = "International Electric Machines and Drives Conference, IEMDC 2025",

pages = "16--21",

booktitle = "2025 IEEE International Electric Machines \& Drives Conference (IEMDC)",

edition = "1",

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Weissitsch, G , Krainer, T , Marth, E , Bramerdorfer, G & Peer, M 2025, Investigation of a Variable Flux PMSM with Mechanical Modulators between the Rotor Poles. in 2025 IEEE International Electric Machines & Drives Conference (IEMDC): IEMDC, Houston, Texas, May 18-21, 2025 . 1 edn, International Electric Machines and Drives Conference, IEMDC 2025, pp. 16-21. https://doi.org/10.1109/IEMDC60492.2025.11061048

Investigation of a Variable Flux PMSM with Mechanical Modulators between the Rotor Poles. / Weissitsch, Gabriel ; Krainer, Thomas ; Marth, Edmund et al.
2025 IEEE International Electric Machines & Drives Conference (IEMDC): IEMDC, Houston, Texas, May 18-21, 2025 . 1. ed. 2025. p. 16-21 (International Electric Machines and Drives Conference, IEMDC 2025).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceedings › peer-review

TY - GEN

T1 - Investigation of a Variable Flux PMSM with Mechanical Modulators between the Rotor Poles

AU - Weissitsch, Gabriel

AU - Krainer, Thomas

AU - Marth, Edmund

AU - Bramerdorfer, Gerd

AU - Peer, Markus

PY - 2025

Y1 - 2025

N2 - This work aims to investigate the characteristics and potential of a permanent magnet synchronous machine (PMSM) utilizing movable elements in the rotor core between the magnets to vary the rotor flux linkage. The geometry of the machine under investigation is presented, and the flux reduction principle is described in detail. The characteristics of the variable flux machine (VFM) is compared to a conventional PMSM with internal magnets to identify the benefits and drawbacks in terms of efficiency. An analytical approach demonstrates the dependency of the flux reduction on specific machine parameters. A mechanical stress simulation is performed to show that the machine can withstand the forces acting on it. Lastly, an option to apply the flux reduction concept to a surface-mounted permanent magnet (SPM) machine is presented.

AB - This work aims to investigate the characteristics and potential of a permanent magnet synchronous machine (PMSM) utilizing movable elements in the rotor core between the magnets to vary the rotor flux linkage. The geometry of the machine under investigation is presented, and the flux reduction principle is described in detail. The characteristics of the variable flux machine (VFM) is compared to a conventional PMSM with internal magnets to identify the benefits and drawbacks in terms of efficiency. An analytical approach demonstrates the dependency of the flux reduction on specific machine parameters. A mechanical stress simulation is performed to show that the machine can withstand the forces acting on it. Lastly, an option to apply the flux reduction concept to a surface-mounted permanent magnet (SPM) machine is presented.

UR - https://www.scopus.com/pages/publications/105010758542

U2 - 10.1109/IEMDC60492.2025.11061048

DO - 10.1109/IEMDC60492.2025.11061048

M3 - Conference proceedings

T3 - International Electric Machines and Drives Conference, IEMDC 2025

SP - 16

EP - 21

BT - 2025 IEEE International Electric Machines & Drives Conference (IEMDC)

ER -

Weissitsch G , Krainer T , Marth E , Bramerdorfer G , Peer M. Investigation of a Variable Flux PMSM with Mechanical Modulators between the Rotor Poles. In 2025 IEEE International Electric Machines & Drives Conference (IEMDC): IEMDC, Houston, Texas, May 18-21, 2025 . 1 ed. 2025. p. 16-21. (International Electric Machines and Drives Conference, IEMDC 2025). doi: 10.1109/IEMDC60492.2025.11061048

Investigation of a Variable Flux PMSM with Mechanical Modulators between the Rotor Poles

Abstract

Publication series

Fields of science

JKU Focus areas

UN SDGs

Access to Document

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Electric Machines with Inherent Speed-Dependent Characteristics for More Sustainable and Efficient Energy Conversion