Local Weak Observability Conditions of Sensorless AC Drives

Authors: Mohamad Koteich, Abdelmalek Maloum, Gilles Duc, Guillaume Sandou

Conference: 17th Conference on Power Electronics and Applications-EPE’15-ECCE Europe, Geneva, Switzerland, 8-10 September 2015

DOI: 10.1109/EPE.2015.7309238

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Abstract: Alternating current (AC) electrical drive control without mechanical sensors is an active research topic. This paper studies the observability of both induction machine and synchronous machine sensorless drives. Observer-based sensorless techniques are known for their deteriorated performance in some operating conditions. An observability analysis of the machines helps understanding (and improving) the observer’s behavior in the aforementioned conditions.