TY - GEN
T1 - On-Load Electromagnetic Force Analysis of a 160kW Interior PM Traction Motor Based on Frozen Permeability Method
AU - Li, Hua
AU - Zhang, He
AU - Xu, Zeyuan
AU - Zou, Tianjie
AU - Huang, Hailin
AU - Gerada, Chris
AU - Zhang, Xiaochen
AU - Gerada, David
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Interior permanent magnet (IPM) machines are widely adopted as traction motors in electric vehicles (EVs), with their vibration and noise issues obtaining more and more research attentions. The radial magnetic force harmonics applied on the stator, are the main factor of electromagnetic (EM) vibration in electric machines. Relationship between open-circuit magnetic field and corresponding EM force behavior of IPM machines have been extensively investigated and well revealed, while the contribution of armature reaction field to EM force is still not well understood. In this paper, onload magnetic field harmonics in a typical 160kW, 48-slot, 8-pole IPM motor, are analyzed by analytical method and finite element tools, to investigate their contributions to radial EM force harmonics, respectively. Frozen permeability (FP) technique is utilized to extract and highlight the influence of armature reaction on EM force. The zeroth-mode EM force harmonics of three typical peak operating conditions of the motor are analyzed and corresponding radial acceleration responses are calculated. It is interesting to find that the armature field not only can increase the amplitude of the zeroth-mode vibration via generating EM force harmonics with existing time order compared with that of PM field, but also inducing additional zeroth-mode force harmonics with different time orders. The analyses results indicate clearly that armature reaction is more influential than open-circuit PM field in terms of inducing 0th mode EM vibration under peak operations with high current loading in IPM traction motors.
AB - Interior permanent magnet (IPM) machines are widely adopted as traction motors in electric vehicles (EVs), with their vibration and noise issues obtaining more and more research attentions. The radial magnetic force harmonics applied on the stator, are the main factor of electromagnetic (EM) vibration in electric machines. Relationship between open-circuit magnetic field and corresponding EM force behavior of IPM machines have been extensively investigated and well revealed, while the contribution of armature reaction field to EM force is still not well understood. In this paper, onload magnetic field harmonics in a typical 160kW, 48-slot, 8-pole IPM motor, are analyzed by analytical method and finite element tools, to investigate their contributions to radial EM force harmonics, respectively. Frozen permeability (FP) technique is utilized to extract and highlight the influence of armature reaction on EM force. The zeroth-mode EM force harmonics of three typical peak operating conditions of the motor are analyzed and corresponding radial acceleration responses are calculated. It is interesting to find that the armature field not only can increase the amplitude of the zeroth-mode vibration via generating EM force harmonics with existing time order compared with that of PM field, but also inducing additional zeroth-mode force harmonics with different time orders. The analyses results indicate clearly that armature reaction is more influential than open-circuit PM field in terms of inducing 0th mode EM vibration under peak operations with high current loading in IPM traction motors.
KW - Armature reaction field
KW - Electric vehicles
KW - Frozen permeability
KW - PM machine
KW - Radial force
KW - Vibration
UR - http://www.scopus.com/inward/record.url?scp=85172721663&partnerID=8YFLogxK
U2 - 10.1109/IEMDC55163.2023.10238940
DO - 10.1109/IEMDC55163.2023.10238940
M3 - Conference contribution
AN - SCOPUS:85172721663
T3 - 2023 IEEE International Electric Machines and Drives Conference, IEMDC 2023
BT - 2023 IEEE International Electric Machines and Drives Conference, IEMDC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE International Electric Machines and Drives Conference, IEMDC 2023
Y2 - 15 May 2023 through 18 May 2023
ER -