Parameter Sensitivity of MRAS-Based sensorless control for PMSM considering speed accuracy and dynamic response at low stator frequencies

Abstract

This paper reports a sensorless control strategy for permanent magnet synchronous motors (PMSM) based on the model reference adaptive system (MRAS) method, which is being analyzed at low stator frequencies. The method was designed for medium and high stator frequencies, where some well per-formance solutions already exist and later on this designed method was implemented for low stator frequencies to operate the machine with less dynamic. In order to investigate the effects of parameter variation, a model-based system engineering (MBSE) approach was used to compare the simulative and practical results. The simulative study of the control strategy was performed using MATLAB®/Sim-ulink®. Further, on the MRAS based method was implemented on a target system directly from the simulations models by using code generation software. The performance evaluation of the parameter sensitivity of the control method was focused on accuracy of the flux-oriented angle and its dynamic response. Thus, results justify a resource-efficient MRAS implementation on a microprocessor (μC) suitable for low stator frequency operation.