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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.23707 |
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| _version_ | 1866911623341408256 |
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| author | Hajji, Taha El Nadkin, Aleksandr Skoog, Stefan Sjöberg, Lars Nilsson, Kristoffer Morcos, Anthony C. |
| author_facet | Hajji, Taha El Nadkin, Aleksandr Skoog, Stefan Sjöberg, Lars Nilsson, Kristoffer Morcos, Anthony C. |
| contents | Variable flux memory motors, which employ Low Coercive Force (LCF) magnets, achieve extended high-efficiency operation through controllable magnetization states. To address the need for a unified approach to defining and comparing the magnetization state (MS) across material and motor levels, this paper proposes four MS definitions: two based on intrinsic material properties-magnetic flux density B and magnetic polarization J-and two based on motor-level quantities-fundamental flux linkage and back-EMF components. These definitions are evaluated across the id, iq operating plane using finite element analysis on an interior PMSM with a hybrid magnet configuration (LCF and HCF: High Coercive Force) and a defined circuit setup. The results clarify the relationship between material-level behavior and measurable motor quantities. The proposed framework provides guidance for selecting appropriate MS metrics depending on the application objective, whether for material analysis, control implementation, or condition monitoring in variable flux machines. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_23707 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Defining the Magnetization State of LCF Magnets: From Material Properties to Motor-Level Metrics Hajji, Taha El Nadkin, Aleksandr Skoog, Stefan Sjöberg, Lars Nilsson, Kristoffer Morcos, Anthony C. Systems and Control Mathematical Physics Applied Physics Variable flux memory motors, which employ Low Coercive Force (LCF) magnets, achieve extended high-efficiency operation through controllable magnetization states. To address the need for a unified approach to defining and comparing the magnetization state (MS) across material and motor levels, this paper proposes four MS definitions: two based on intrinsic material properties-magnetic flux density B and magnetic polarization J-and two based on motor-level quantities-fundamental flux linkage and back-EMF components. These definitions are evaluated across the id, iq operating plane using finite element analysis on an interior PMSM with a hybrid magnet configuration (LCF and HCF: High Coercive Force) and a defined circuit setup. The results clarify the relationship between material-level behavior and measurable motor quantities. The proposed framework provides guidance for selecting appropriate MS metrics depending on the application objective, whether for material analysis, control implementation, or condition monitoring in variable flux machines. |
| title | Defining the Magnetization State of LCF Magnets: From Material Properties to Motor-Level Metrics |
| topic | Systems and Control Mathematical Physics Applied Physics |
| url | https://arxiv.org/abs/2604.23707 |