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Speed identification for induction motor based on CESO flux observer and MRAS
Author(s): 
Pages: 57-63,77
Year: Issue:  4
Journal: Electric Machines and Control

Keyword:  induction motorsclosed loop extended-state-observermodel reference adaptive systemro-tor flux estimationspeed identification;
Abstract: Flux observer based on closed loop extended-state-observer ( CESO) and model reference a-daptive system ( MRAS) based estimation algorithms were proposed in the thesis,and used in the speed-sensorless vector controlled induction motors ( IMs) system.A modified flux estimation model using CESO and integrated with flux compensate technology is introduced to reduce the uncertainty of the IMs model. Sensitivity of the sensorless drive against parameter and measurement errors is also qualitatively dis-cussed.The speed identification algorithms is less sensitive to integration-related problems such as satura-tion and voltage drop at low speed,and its accuracy is independent the rotor resistance and torque varia-tions as well.Simulations and experimental results proved the validity and practicability of the algorithm by comparing with classic MRAS method.
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