Flux Linkage-Based Direct Model Predictive Current Control for Synchronous Machines

Sebastian Wendel, Petros Karamanakos, Philipp Gebhardt, Armin Dietz, Ralph Kennel

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

This paper presents a flux linkage-based direct model predictive current control approach that achieves favorable performance both during steady-state and transient operation. The former is achieved by computing the optimal time instants at which a new switch position is applied to the converter. To this end, the future current behavior is not computed based on the machine inductances or inductance look-up tables; instead, flux linkage maps are utilized to predict the trajectory of the magnetic flux linkage, and subsequently of the current. This is advantageous for electric drives with noticeable magnetic nonlinearity in terms of saturation and/or cross-coupling effects. Hence, by using flux linkage maps in the prediction process, the evolution of the stator current can be calculated more accurately, enabling the controller to make better switching decisions. Moreover, the discussed predictive controller exhibits excellent dynamic performance owing to its direct control nature, i.e., the control and modulation tasks are performed in one computational stage rendering a dedicated modulation stage redundant. Three different drive systems based on permanent magnet synchronous motors (PMSMs) are examined to demonstrate the effectiveness of the presented control approach.

Original languageEnglish
Pages (from-to)14237-14256
Number of pages20
JournalIEEE Transactions on Power Electronics
Volume36
Issue number12
DOIs
Publication statusPublished - 2021
Publication typeA1 Journal article-refereed

Keywords

  • ac drives
  • Computational modeling
  • Control systems
  • Couplings
  • direct control
  • finite control set MPC (FCS-MPC)
  • flux linkage maps
  • implicit modulator
  • Model predictive control (MPC)
  • Modulation
  • Predictive models
  • SoC FPGA
  • Stators
  • Switches
  • synchronous machines

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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