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The performance of a speed sensorless variable structure direct torque controlled interior permanent magnet synchronous motor drive is investigated in this paper. The speed is estimated using position information extracted using high frequency signal injection at low speeds and a sliding observer at high speeds. The changeover between these two algorithms is performed using a weighting function which...
The control system for position control of the drive employing PMSM based on the principles of sliding mode control and respecting the principles of vector control is presented. Designed controller is chattering free and complies with demanded control precision. Described control technique divides PMSM into two channels, which enable to control motor flux and torque separately. The controller is of...
In this paper we analyze the asymptotic stability of a vector control system for an induction motor with short-circuited rotor that contains in its loop a Luemberger estimator. The studied control system is based on the direct rotor flux orientation method (DFOC) and the stability study is based upon the linearization theorem around the equilibrium points of the control system, emphasizing the estimated...
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