B. Singh,∗ B.P. Singh,∗ and S. Dwivedi∗∗
PMSM, sensor reduction, sensorless control
In permanent magnet synchronous motor (PMSM) drives, sensors are used to sense the position/speed of the rotor and to sense current and voltage of the drive. These sensors are susceptible to atmospheric change and less reliable due to fragile nature. The cost of the drive is also increased to great extent with these sensors, therefore sensor elimination is very important for greater reliability and cost effectiveness of the drive. For improving the closed loop performance of this drive, it is utmost necessary to estimate the position and speed, voltage, current in the drive correctly so that high level of performance for closed loop control can be implemented. This paper presents a comprehensive review of different mechanical and electrical sensor reduction techniques. It is aimed to provide in-depth coverage of the status of different position, speed, voltage and current sensorless techniques. A classified list of more than 200 research publications on the status of mechanical sensor elimination and reduced electrical sensor operation is included for a quick reference.
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