A Novel Current Limitation Technique Exploiting the Maximum Capability of Power Electronic Inverter and Bearingless Machine

Zhuang Wen, Giorgio Valente, Andrea Formentini, Luca Papini, Chris Gerada, Pericle Zanchetta

Research output: Journal PublicationArticlepeer-review

Abstract

This article presents a current limitation technique for a multiphase bearingless machine featuring a combined winding system. This winding structure allows the machine to produce both suspension force and motoring torque. The main challenges with the combined winding configuration consist of decoupling the suspension force and torque generation and designing a proper current limitation algorithm. The former topic has been already tackled and presented in previous publications, while the latter will be addressed in this article. In particular, the proposed suspension force control technique will allow to prioritize either suspension force or torque generation. In this article, the priority is given to the rotor levitation, hence the suspension force rather than the torque is essential. Finally, simulation results and experiment validation on a $\text{1.5}\,\text{kW}/3000\,\text{r/min}$ prototype machine are provided.

Original languageEnglish
Pages (from-to)7012-7023
Number of pages12
JournalIEEE Transactions on Industry Applications
Volume57
Issue number6
DOIs
Publication statusPublished - 2021
Externally publishedYes

Keywords

  • Bearingless machines
  • current limitation
  • fault tolerance
  • multiphase machines
  • permanent magnet synchronous machines

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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