Current Sensorless Direct Predictive Control for Permanent-Magnet Synchronous Motor Drives

Inhalt:
A current sensorless control method is introduced based on current direct predictive control for permanent-magnet synchronous motor drives in order to reduce costs and avoid problems caused by faults of the current sensor. Future values of stator currents are predicted to select the voltage vector which minimizes a given cost function. The current sensor can be omitted by replacing actual feedback stator currents with predicted currents. A simulation study is performed in order to compare performances with and without the current sensor if external disturbances or measurement errors in motor parameters exist.