Implications of the Sensorless Predictive Control for Line-Start Permanent Magnet Synchronous Machine

This article intends to demonstrate a real-time sensorless predictive control for a Line-Start Permanent Magnet Synchronous Machine (LSPMSM) with a speed observer based on the Model Reference Adaptive System (MRAS). The investigated control approach is evaluated under diverse scenarios in simulation and experimental studies to give an in-depth analysis. The LSPMSM's dynamic and steady-state performance characteristics are thoroughly examined. A step speed case was investigated. Similarly, the low and high-speed responses were assessed. The LSPMSM's capacity to handle sudden load increases in synchronous mode was also evaluated. When compared to sensor-equipped predictive control, the real-time implementation via the dSPACE dS1103 digital controller applied to a 1.5 kW LSPMSM drive system indicates that the proposed design strategy achieves sensorless control without degrading machine performance in terms of operational speed, dynamic torque and flux responses, steady-state torque and flux ripples, current total harmonic distortion, and converter switching frequency.