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Sensorless field oriented control (SFOC) of induction motor (IM) drives estimate the mechanical position of the rotor and the field orientation by means of the motor voltage and current measures. In many cases, the motor voltages measures are substituted by the inverter commands, and the flux estimation is based on the stator model of the machine, i.e. the integration of back EMF voltages. With closed...
The PMSM is inherently electronically controlled and requires rotor position information for proper drives. However, the problems of the space, cost, and reliability of rotor position sensors have motivated research in the area of position sensorless PMSM drives. Numerous rotor position sensorless control techniques have been proposed for PMSM drives, but most rely directly or indirectly on the estimation...
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