A unified model for low-cost high-performance AC drives: the Equivalent Flux concept

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

Conference: The Third International Conference on Electrical, Electronics, Computer Engineering and their Applications (EECEA2016), Apr 2016, Beirut, Lebanon.

DOI: 10.1109/EECEA.2016.7470768

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Abstract: This paper presents a unified modeling approach of alternating current (AC) machines for low-cost high-performance drives. The Equivalent Flux concept is introduced. Using this concept , all AC machines can be seen as a non-salient synchronous machine with modified (equivalent) rotor flux. Therefore, complex salient-rotor machines models are simplified, and unified shaft-sensorless AC drives can be sought. For this purpose, a unified observer-based structure for rotor-flux position and speed estimation is proposed. The equivalent flux concept generalizes the existing concepts, such as the extended back-electromotive force, the fictitious flux and the active flux.

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