Deviation Control in Comparison with DTC and FOC for SynRM Drives

Abstract

Essentially in electric drives, control issues deal with the deviation of variables introducing dynamical behaviors. Hence, a deviation model could be effective as an approach to the issues. In addition, dynamical analyses have some complexities by using nonlinear and multi-variables modeling. In this paper, a deviation modelling approach is discussed to analyze and control a synchronous reluctance motor (SynRM) drive. Normalization as a tool supports the deviation modeling to simplify the model. A deviation model-based control (DevC) provides some facilities in terms of parameter independency, simplicity, flux and torque decoupling, and fast dynamics. DevC is compared with Field-oriented control (FOC) and Direct Torque Control (DTC) methods in aspects of torque ripples, switching features, and dynamic responses. Both experimental and simulation results support the theoretical findings. The proposed approach not only could be extended for other electric drives but also it could be adopted for other dynamic systems.