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The paper presents results of studies on the sensorless drive with permanent magnet synchronous motor (PMSM) supplied through the motor choke. The position is estimated using a modified Luenberger observer. Its modification consists in using a PII 2 correction function instead a proportional one, which gives smaller estimation errors. The advantages of that… (More)
The paper deals with the problem of sensorless control of SRM drives. A speed control system using back EMF and position estimator is presented. The shaft position is estimated using a "global" current error. That observer robustness on motor parameter accuracy estimation is verified by simulation results.
The paper presents results of a research on the sensorless drive with PMSM supplied through the sinusoidal filter. The back electromotive force based observer is used to the shaft position estimation. Used in the study, the observer's correction function, contains multi integrators in the path, which improves the position estimation. Otherwise than in a… (More)
A new control structure is presented for use at the sensorless control of speed for low speed range. That method uses an observer for position estimation. Such structure does not require the calculation of the speed value from the estimated back EMF, thus such drive can work even in a case of non-sinusoidal shape of estimated back EMF. Such structure is… (More)