Global linear model of Sensorless Vector Control Systems for induction machines

The linear models of Sensorless Vector Control Systems (SVCSs) for induction machines have common and non-common control blocks. The peculiar variables exist in the differential equations of common control blocks. This paper proposes the method eliminating peculiar differential variables from the differential equations of common control blocks. The proposed method and obtained linear models can simplify the calculation process of the linear model of other SVCSs. The linear model is defined as a Global Linear Model (GLM). The GLM can simplify the process of stability analysis to compare between the various SVCSs, since the linear models of other SVCSs can be derived easily by swapping the linear models of non-common parts.