Simulation and experimental study of observer-based robust speed control of a self-controlled synchronous motor

The authors study the suitability and practicality of using nonadaptive and adaptive state observer-based methods to achieve robust (parameter-insensitive) speed control characteristics for a self-controlled synchronous motor drive system. The sliding mode speed control technique is employed to provide the robust property of the drive system. Design methods for various state observers that can be used to estimate the acceleration signal are discussed. A fast reduced-order observer is shown to be most suitable for sliding mode speed control applications. Both digital simulation and experimental results for a 3 hp drive system are presented to substantiate the theoretical design and analysis