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A Novel model reference adaptive system (MRAS) based speed estimation technique is presented in this paper. The speed estimator utilizes instantaneous and steady state values of V⃗* × I⃗ in the reference and adjustable models of the MRAS respectively. The major advantages of this method are: (i) flux estimation is not required and (ii) the method is stable in all the 4-quadrants of operation. The...
This paper presents a novel strategy for the vector control of IPMSM, without signal injection. The overall performance of the motion-sensorless control depends strongly on the accuracy of the rotor position and speed estimation. The proposed state observer is based on the concept of the ldquoactive fluxrdquo (or ldquotorque producing fluxrdquo), which ldquoturns all the salient-pole rotor ac machines...
It is knownthatmechanical sensorless control of PMSM is sensitive to the stator resistance uncertainties. In this paper, the influence of these uncertainties on the sensorless control is studied and a simple method improving the control performances is proposed. This method consists in imposing a proportional relationship between the stator current components. It makes the sensorless control law...
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