TY - JOUR
T1 - A dynamic model for the frictional power loss analysis of a synchronous motor rotor-bearing system
AU - Xu, Yajun
AU - Yang, Yang
AU - Liu, Jing
AU - Li, Xinbin
AU - Zhang, Yu
N1 - Publisher Copyright:
© IMechE 2025
PY - 2026/1
Y1 - 2026/1
N2 - Permanent magnet synchronous motors (PMSMs) are broadly adopted as the power sources of the electric underwater vehicles. However, the frictional forces of supporting bearings for PMSMs result in power loss, which can significantly affect the sail range and duration of the vehicle. This work presents a novel approach to quantitatively evaluate the frictional power loss of a PMSM by developing an electromechanical dynamic model. The model considers the lateral and rotational degrees of freedom of inner raceway and rolling balls in supporting angular contact ball bearings (ACBBs). The external loads on the PMSM rotor, including unbalanced magnetic pull (UMP), electromagnetic torque, nonlinear supporting forces, and mixed elastohydrodynamic lubrication (EHL) friction forces of ACBBs, are also considered. The dynamic modelling method is validated by Simpack and JMAG. Based on the simulation results, the mechanisms of the bearing clearance and raceway surface roughness influencing the frictional power loss of the PMSM are investigated. This study can provide effective guidance for the design of high-efficiency PMSMs for underwater vehicles.
AB - Permanent magnet synchronous motors (PMSMs) are broadly adopted as the power sources of the electric underwater vehicles. However, the frictional forces of supporting bearings for PMSMs result in power loss, which can significantly affect the sail range and duration of the vehicle. This work presents a novel approach to quantitatively evaluate the frictional power loss of a PMSM by developing an electromechanical dynamic model. The model considers the lateral and rotational degrees of freedom of inner raceway and rolling balls in supporting angular contact ball bearings (ACBBs). The external loads on the PMSM rotor, including unbalanced magnetic pull (UMP), electromagnetic torque, nonlinear supporting forces, and mixed elastohydrodynamic lubrication (EHL) friction forces of ACBBs, are also considered. The dynamic modelling method is validated by Simpack and JMAG. Based on the simulation results, the mechanisms of the bearing clearance and raceway surface roughness influencing the frictional power loss of the PMSM are investigated. This study can provide effective guidance for the design of high-efficiency PMSMs for underwater vehicles.
KW - Power loss calculation
KW - friction torque
KW - permanent magnet synchronous motor
KW - roughness surface
KW - slip behavior
UR - https://www.scopus.com/pages/publications/105003158241
U2 - 10.1177/13506501251334703
DO - 10.1177/13506501251334703
M3 - 文章
AN - SCOPUS:105003158241
SN - 1350-6501
VL - 240
SP - 57
EP - 72
JO - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
JF - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
IS - 1
ER -