Sensorless control of synchronous motor drives: Accurate torque estimation and control under parameter errors

Anantaram Varatharajan*, Gianmario Pellegrino, Eric Armando, Marko Hinkkanen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Accurate torque control is of interest in traction and other industrial applications, whose realization is challenged by parameters errors and temperature-induced variations. This article proposes a sensorless technique for resilient torque control in salient synchronous machines. The position observer is driven by the adaptive projection vector for the position error estimation (APP) scheme. A second projection vector, orthogonal to APP for noninterference, serves for flux adaptation. Based on the torque estimation, a model-based optimal current reference generation for maximum torque per ampere (MTPA) condition is designed to realize accurate torque control. The proposed scheme is validated experimentally on a 1.1-kW synchronous reluctance (SyR) machine test bench.

Original languageEnglish
Pages (from-to)5367-5376
Number of pages10
JournalIEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
Volume9
Issue number5
Early online date13 Nov 2020
DOIs
Publication statusPublished - Oct 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Sensorless control
  • Adaptive projection vector
  • Flux adaptation
  • Torque control
  • Optimal current reference

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