Model reference adaptive system and pseudo-sliding mode control with exponential reaching law for sensorless-speed...

Area of Science:

• Electrical Engineering
• Control Systems
• Motor Drives

Background:

• Sensorless speed control is crucial for Permanent Magnet Synchronous Motors (PMSMs) to reduce costs and improve reliability.
• Conventional sliding mode control methods often suffer from chattering, impacting system longevity and performance.

Purpose of the Study:

• To propose a hybrid sensorless speed control technique for PMSMs.
• To address limitations of existing methods by integrating advanced control strategies.
• To enhance the robustness and efficiency of PMSM drives.

Main Methods:

• A hybrid control technique combining Model Reference Adaptive System (MRAS) and pseudo-sliding mode control with an Approach Reaching Law (ARL).
• MRAS used for robust sensorless observation, adapting to dynamic conditions.
• Pseudo-sliding mode control with Continuous Approximation (CA) to mitigate chattering.
• Exponential Reaching Law (ERL) for fast and precise convergence.

Main Results:

• Simulations demonstrated the proposed hybrid approach's effectiveness under various uncertainties and disturbances.
• The technique showed improved performance compared to classical Exponential Reaching Law-Sliding Mode Control (ERL-SMC) and pseudo-sliding mode ERL-SMC schemes.
• Robustness against parameter variations, load torque, and speed changes was verified.

Conclusions:

• The proposed hybrid sensorless control technique offers a reliable and efficient solution for PMSM drives.
• Integration of MRAS, pseudo-sliding mode control, and ARL effectively overcomes chattering and enhances dynamic performance.
• This approach provides a foundation for more advanced and robust motor control systems.