Modeling Saturation Saliency with High-Frequency Signal Injection for IM drives

In this paper, an improved saturation model combined with a high frequency signal injection is proposed. The classical model is not able to analyze the interaction between the low frequency main field and the field generated by high frequency signal injection. To remedy this problem, we introduce in this paper a new saturated induction motor model adopts to describe the phenomena produced by adding high frequency signal. This model contains saturation which is considered as the difference between unsaturated and saturated magnetizing flux. The machine is modeled with two different rotor circuits because due to the saturation the air gap flux contains the fundamental and the third harmonic. In order to describe the effects produced by injection of high frequency signal, a rotating voltage signal is added to normal supply of saturated induction motor. To demonstrate the effectiveness of proposed model the simulation tests are used. The results clearly demonstrate the validity of the proposed model specifically in terms of signal injection and saturation.