Sensorless Control of the Permanent Magnet Synchronous Motor

Area of Science:

• Electrical Engineering
• Control Systems
• Robotics

Background:

• Precise control of permanent magnet synchronous motors (PMSM) is crucial for high-performance drive applications.
• Traditional sensor-based control methods add cost, complexity, and potential failure points.
• Sensorless control techniques aim to estimate motor states without physical sensors, offering advantages in robustness and cost-effectiveness.

Purpose of the Study:

• To experimentally verify the performance of two novel sensorless control methods for PMSM.
• To evaluate the effectiveness of these methods, particularly in the challenging near-zero speed region.
• To compare the estimation accuracy of a modified Luenberger observer and an unscented Kalman filter.

Main Methods:

• Implementation and detailed algorithmic description of a modified Luenberger observer for sensorless PMSM control.
• Implementation and detailed algorithmic description of an unscented Kalman filter for sensorless PMSM control.
• Comparative experimental testing across a full range of reference speeds, with a focus on near-zero speed performance.

Main Results:

• Both the modified Luenberger observer and the unscented Kalman filter demonstrated capability in tracking actual motor speed and position.
• The estimation methods achieved small deviations, suitable for high-precision drive applications.
• Experimental validation confirmed the effectiveness of the sensorless approaches across diverse operating conditions.

Conclusions:

• The proposed novel estimation methods provide a viable solution for high-precision sensorless control of PMSM.
• The experimental verification confirms the practical applicability and accuracy of these techniques.
• Sensorless control using these advanced observers offers a robust and precise alternative for motor drive systems.