Computationally efficient Anisotropy-Identification based on a Square-Shaped Injection Pattern

Konferenz: PCIM Europe 2016 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
10.05.2016 - 12.05.2016 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2016

Seiten: 8Sprache: EnglischTyp: PDF

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Landsmann, Peter; Paulus, Dirk; Kuehl, Sascha; Kennel, Ralph (Technische Universität München, Germany)

This paper proposes a discrete-time anisotropy-based sensorless control approach that compared to literature causes only a fraction of the computational load. While all known methods consist of two computation stages with vector transformations and/or matrix inversions, the proposed method identifies the anisotropy in a single stage with only 6 subtractions. The basis for this simple evaluation is a square-shaped injection pattern and a current control cycle of two PWM periods. The paper provides the mathematical derivation, a comparison to other methods and the experimental validation of the proposed approach.