Power-Sharing Control in Bearingless Multi-Sector and Multi-Three-Phase Permanent Magnet Machines

Sala, Giacomo; Valente, Giorgio; Nardo, Mauro Di; Degano, Michele; Zanchetta, Pericle; Gerada, Chris

Abstract

This paper deals with the power-sharing control of bearingless multi-sector and multi-three-phase permanent magnet machines. The proposed control strategy allows to distribute the power flows among the three-phase inverters supplying the machine during bearingless operation of the drive. The control technique is based on the extension of the vector space decomposition modeling approach. The components producing the electromagnetic torque, i.e. the q-axis currents, are controlled independently from the d-axis ones, also with the aim of managing the power flows among the three-phase systems. Conversely, the d-axis currents are exploited for the generation of the radial forces needed to levitate the rotor, while considering the compensation of the forces caused by the q-axis currents in case of unbalanced power sharing strategy. The validity of the proposed method is confirmed by simulations and experimental tests on a prototyped bearingless multi-sector permanent magnet synchronous machine. The proposed approach is a contribution to the development of advanced control systems employing multiphase drives in the field of bearingless and multiport applications.

• Journal Article Type: Article
• Acceptance Date: Sep 8, 2020
• Online Publication Date: Sep 29, 2020
• Publication Date: 2021-10
• Deposit Date: Sep 16, 2020
• Publicly Available Date: Sep 29, 2020
• Journal: IEEE Transactions on Industrial Electronics
• Print ISSN: 0278-0046
• Electronic ISSN: 1557-9948
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 68
• Issue: 10
• Pages: 9070-9080
• DOI: https://doi.org/10.1109/tie.2020.3026273
• Keywords: Electrical and Electronic Engineering; Control and Systems Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/4906281
• Publisher URL: https://ieeexplore.ieee.org/document/9209168
• Additional Information: © 2020 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.