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In this paper, a sensorless control scheme using improved stator flux estimator for high speed induction motors has been proposed to compensate a Programmable Low Pass Filter. This paper has analyzed the affect between the estimated speed error and the phase error of the stator flux in high speed range. The estimated speed error compensation scheme has also proposed. The validity of the proposed schemes...
In this paper, the improved stator flux estimator has been proposed to ensure a Programmable Low Pass Filter (PLPF) to act as a pure integrator for sensorless control of induction motors. In a conventional PLPF, the estimated synchronous angular speed is used as a cutoff frequency of a PLPF whose gain and phase compensator is determined on the assumption of the estimated synchronous angular speed...
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