Reduced-order observer with parameter adaption for fast rotor flux estimation in induction machines

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Abstract
In the paper a new reduced-order observer with parameter adaption is presented. The observer is based on the ‘current’ model in field-oriented co-ordinates. The theoretical principles of the developed algorithm are discussed.Some results of comparative investigations are presented, which illustrate the steady-state and dynamic properties of the speed control system with observer and conventional current models.

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