Discussion on "AC Drive Observability Analysis"
Mohamad Koteich, Abdelmalek Maloum, Gilles Duc, Guillaume Sandou
TL;DR
This paper discusses the observability of induction machines and PMSMs in sensorless operation, revisiting assumptions and conditions at standstill to improve understanding of their control and monitoring capabilities.
Contribution
It critically analyzes the observability conditions of PMSMs at standstill and discusses the implications of the slowly varying speed assumption in sensorless control.
Findings
Revisits PMSM observability at standstill
Discusses the impact of the slowly varying speed assumption
Provides insights into sensorless control challenges
Abstract
In the paper by Vaclavek et al. (IEEE Trans. Ind. Electron., vol. 60, no. 8, pp. 3047-3059, Aug. 2013), the local observability of both induction machine and permanent-magnet synchronous machine (PMSM) under motion-sensorless operation is studied. In this letter, the "slowly varying" speed assumption is discussed, and the PMSM observability condition at standstill is revisited.
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