MATLAB Implementation of Speed Sensorless Control for Three-Phase Induction Motors

In this article, we provide a detailed MATLAB implementation of speed sensorless control for three-phase induction motors, utilizing the MarsMATLAB version 7.4 speed identification algorithm. Three-phase induction motors serve as fundamental components in various industrial applications, playing critical roles in modern automation systems. We will explore the underlying principles and practical applications through MATLAB simulations, examining motor components, operational mechanisms, and associated technical aspects. The implementation includes model-based estimation techniques that calculate rotor speed without physical sensors by analyzing stator voltage and current measurements. Our MATLAB implementation demonstrates how to structure the simulation environment, configure motor parameters, and implement adaptive observers for real-time speed estimation. Key functions include signal processing routines for current/voltage sampling, flux observers based on voltage models, and recursive algorithms for parameter adaptation. Through this study, you will gain comprehensive understanding of sensorless control methodologies and develop essential skills for implementing advanced motor control systems, establishing a solid foundation for future research and industrial applications.