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
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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.
Note to Practitioners
—LSPMSM usually are connected directly to the 3-phase supply. But it is important to note that they have both the qualities of IM and PMSM. The motivation for this research is to investigate how we can utilize the LSPMSM for the variable speed drive operation. Since, PMSM requires sophisticated startup mechanism, but produces similar steady-state performance to LSPMSM, this research helps evaluate the performance of the predictive control for LSPMSM without the speed sensor.