More Like this

1. Electric Forces in the Charged SYK Model

   Susskind, Leonard (December 2020, ArXivorg)

   null (Ed.)
2. Multiharmonic Force Vector Model for Bearingless Electric Motors

   https://doi.org/10.1109/TIA.2024.3481210  

   Khamitov, Anvar; Severson, Eric L (October 2024, IEEE Transactions on Industry Applications)

   This paper proposes and develops a new analytic bearingless machine model that incorporates multiple airgap harmonic field interactions and has several advantages. The model can be used to address levitation performance requirements by developing force/torque regulation methods to precisely calculate commands to current regulators. This allows relaxing constraints during the design stage and has the potential to enable consideration of higher performance bearingless machines. Furthermore, analogous to torque enhancement in conventional electric machines, the proposed model can be used to identify options for suspension force enhancement in bearingless motors by controlling multiple magnetic field harmonics. This paper provides a detailed derivation of the model and shows how it can be used to improve force regulation accuracy and enhance force capacity. The paper finds that by controlling four airgap harmonic fields, instead of the typical two harmonics, force capacity can be increased by approximately 40%. Hardware measurements using a 10-phase bearingless induction machine validate the proposed model and force capacity increase. 

   more » « less
3. Exact Torque and Force Model of Bearingless Electric Machines

   https://doi.org/10.1109/ECCE50734.2022.9947827  

   Khamitov, Anvar; Severson, Eric L. (October 2022, 2022 IEEE Energy Conversion Congress and Exposition (ECCE))

   This paper proposes and develops a new and exact analytic electric machine model that has several potential advantages. The model can be used to address levitation performance requirements by developing exact force/torque regulation methods to precisely calculate commands to current regulators. This allows relaxing constraints during the design stage and has the potential to enable consideration of higher performance bearingless machines. Furthermore, analogous to torque enhancement in conventional electric machines, the proposed model can be used to identify options for suspension force enhancement by controlling multiple magnetic field harmonics. This paper provides a detailed derivation of the model and shows how it can be used to improve force regulation accuracy and enhance force density. 

   more » « less
4. A multiscale model for charge inversion in electric double layers

   https://doi.org/10.1063/1.5026975  

   Mashayak, S. Y.; Aluru, N. R. (June 2018, The Journal of Chemical Physics)
5. Global trends of the electric dipole polarizability from shell-model calculations

   https://doi.org/10.1103/PhysRevC.108.044309  

   Orce, José Nicolás; Ngwetsheni, Cebo; Brown, B Alex (October 2023, Physical Review C)