Open AccessA 5‐degrees of freedom hybrid excitation bearingless motor for vehicle flywheel battery
Author(s) -
Yang Fan,
Sun Yukun,
Yuan Ye,
Huang Yonghong
Publication year - 2021
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12308
Subject(s) - flywheel , suspension (topology) , decoupling (probability) , control theory (sociology) , excitation , flywheel energy storage , battery (electricity) , magnet , automotive engineering , degrees of freedom (physics and chemistry) , torque , coupling (piping) , power (physics) , computer science , engineering , physics , electrical engineering , mechanical engineering , control engineering , energy storage , mathematics , control (management) , quantum mechanics , artificial intelligence , homotopy , pure mathematics , thermodynamics
To deal with the restriction of vehicle space on a flywheel battery, a 5‐degrees of freedom (DOF) hybrid excitation bearingless motor (HEBM) was proposed. The 5‐DOF suspension force required for the flywheel battery is provided by HEBM. The use of a permanent magnet to provide a suspension bias magnetic field reduces power consumption. The relationship between the torque and suspension systems is weak coupling, which is beneficial to the decoupling control. To verify the aforementioned advantages of HEBM, its topology and principle are introduced, and its electromagnetic characteristics are analysed by finite element method. The HEBM is compared with the single‐winding bearingless switch reluctance motor by focusing on suspension loss and force density.