Open AccessPerformance analysis of asymmetrical less‐rare‐earth permanent magnet motor for electric vehicle
Author(s) -
Lv Bingchang,
Shi Liwei,
Li Lintao,
Liu Kaiwen,
Jing Jianning
Publication year - 2022
Publication title -
iet electrical systems in transportation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.588
H-Index - 26
eISSN - 2042-9746
pISSN - 2042-9738
DOI - 10.1049/els2.12036
Subject(s) - cogging torque , magnet , torque ripple , taguchi methods , finite element method , torque , automotive engineering , rare earth , mechanical engineering , engineering , control theory (sociology) , materials science , structural engineering , computer science , physics , direct torque control , electrical engineering , voltage , induction motor , composite material , metallurgy , control (management) , artificial intelligence , thermodynamics
To reduce the manufacturing cost, the cogging torque and the torque ripple of the traditional V‐shaped permanent magnet motor (TPMM), an asymmetrical less‐rare‐earth permanent magnet motor (ALREPMM) is proposed. An equivalent air‐gap flux density model is established, the model is employed to calculate the analytical expression of the no‐load back‐EMF, and the multiple objectives optimisation are carried out for the motor parameters based on the Taguchi algorithm. Electromagnetic performance of the TPMM structure and the ALREPMM structure is compared by finite element method‐based simulation. It is shown that the ALREPMM structure can reduce the amount of rare‐earth materials by 19%, and the cogging torque and the THD values of no‐load back‐EMF are reduced by 77.3% and 26.8%, respectively. Finally, a prototype is manufactured, thus verifying the rationality of the design of the ALREPMM structure through experiments.