TY - GEN
T1 - Fault-Tolerant Performance in Multi-Unit PMSMs Through Slot Geometry and Magnetic Decoupling
AU - Wang, Yingnan
AU - Zhang, Chengming
AU - Liu, Yingzhen
AU - Gerada, David
AU - Zhang, Fengyu
AU - Xu, Zeyuan
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - To enhance the fault tolerance of modular multi-unit three-phase PMSMs, this paper investigates the influence of pole-slot combinations and stator slot geometries on inter-phase magnetic coupling. A novel open-slot structure with fault-tolerant teeth (FTT) is proposed to improve magnetic decoupling and unit-level independence.Two configurations - 40p48s and 40p36s - combined with three slot types are analyzed via finite element simulation. Flux distribution and inductance matrices are obtained to quantify magnetic coupling, and a coupling coefficient is defined for comparison.To evaluate short-circuit performance, turn-to-turn faults of varying severity are introduced via an external circuit model. Results show that the 40p36s structure with FTT provides superior decoupling and fault containment, enabling continued operation of healthy units without control intervention.
AB - To enhance the fault tolerance of modular multi-unit three-phase PMSMs, this paper investigates the influence of pole-slot combinations and stator slot geometries on inter-phase magnetic coupling. A novel open-slot structure with fault-tolerant teeth (FTT) is proposed to improve magnetic decoupling and unit-level independence.Two configurations - 40p48s and 40p36s - combined with three slot types are analyzed via finite element simulation. Flux distribution and inductance matrices are obtained to quantify magnetic coupling, and a coupling coefficient is defined for comparison.To evaluate short-circuit performance, turn-to-turn faults of varying severity are introduced via an external circuit model. Results show that the 40p36s structure with FTT provides superior decoupling and fault containment, enabling continued operation of healthy units without control intervention.
KW - fault-tolerant teeth
KW - magnetic decoupling
KW - magnetic field distribution
KW - Multi-unit modular PMSM
KW - turn-to-turn SC
UR - https://www.scopus.com/pages/publications/105024678016
U2 - 10.1109/IECON58223.2025.11221744
DO - 10.1109/IECON58223.2025.11221744
M3 - Conference contribution
AN - SCOPUS:105024678016
T3 - IECON Proceedings (Industrial Electronics Conference)
BT - IECON 2025 - 51st Annual Conference of the IEEE Industrial Electronics Society
PB - IEEE Computer Society
T2 - 51st Annual Conference of the IEEE Industrial Electronics Society, IECON 2025
Y2 - 14 October 2025 through 17 October 2025
ER -