Speed Control System of Permanent Magnet Synchronous Motor Based on Sliding Mode Observer

The simulation study of the speed control system for permanent magnet synchronous motors (PMSM) utilizing sliding mode observers represents a significant research area in electrical engineering. This topic has gained substantial attention due to its widespread applications across various industries including automotive, aerospace, and robotics. A key advantage of PMSM lies in its high efficiency, achieved through maintaining consistent speed performance under varying load conditions. To realize this efficiency, the speed control system must accurately estimate rotor position and precisely regulate motor current. The sliding mode observer approach has demonstrated exceptional effectiveness for these tasks, offering robust performance and high estimation accuracy even when facing system disturbances and parameter uncertainties. From an implementation perspective, the sliding mode observer typically involves designing a discontinuous control law that forces system trajectories to slide along a predefined surface, ensuring convergence of estimation errors. Key implementation aspects include proper selection of sliding surface coefficients, chattering reduction techniques, and integration with field-oriented control algorithms for comprehensive motor drive solutions.