Abstract
In the recent years, many speed sensorless control method with adaptive observer of induction motor have been developed. The feedback gain of observer is designed from the responsive viewpoint of the error convergence. When we drive induction motor in the low speed region with each method, the control characteristic is deteriorated. In this paper, we give the design of the speed sensorless adaptive flux observer in the low speed region and propose speed sensorless vector control system with it from the stable viewpoint of the error convergence. And we show experimental results of this method.
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