Skip to main content

Research Repository

Advanced Search

Position control study of a bearingless multi-sector permanent magnet machine

Valente, Giorgio; Formentini, Andrea; Papini, Luca; Zanchetta, Pericle; Gerada, C.


Giorgio Valente

Andrea Formentini

Luca Papini


Bearingless motors combine in the same structure the characteristics of conventional motors and magnetic bearings. Traditional bearingless machines rely on two independent sets of winding for suspension force and torque production, respectively. The proposed Multi-Sector Permanent Magnet (MSPM) motor exploits the spatial distribution of the multi-three-phase windings within the stator circumference in order to produce a controllable suspension force. Therefore, force and torque generation are embedded in the same winding setting. In this paper the force and torque generation principles are investigated and a mathematical model is presented considering the rotor displacement. A two Degree of freedom (DOF) position controller is designed taking into consideration the rotor overall dynamic system and a controller gains selection strategy is suggested. A simulation study of the bearingless system in different operating conditions is presented and the suspension force and torque produced are validated through Finite Element Analysis (FEA).


Valente, G., Formentini, A., Papini, L., Zanchetta, P., & Gerada, C. (2017). Position control study of a bearingless multi-sector permanent magnet machine. .

Conference Name IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society
End Date Nov 1, 2017
Acceptance Date Jul 15, 2017
Publication Date Dec 18, 2017
Deposit Date Jun 7, 2018
Publicly Available Date Jun 7, 2018
Peer Reviewed Peer Reviewed
Keywords Bearingless machines, Multi-Sector Permanent
Magnet machines, Radial Force Control
Public URL
Publisher URL
Related Public URLs
Additional Information © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.


You might also like

Downloadable Citations