Characteristics and modeling of motor load on partial motor stalled conditions

Summary form only given. This paper analyzes the dynamic characteristics of motor load on partial motor stalled conditions and illustrates the describing drawbacks of the traditional “3-order induction motor + ZIP (constant impedance, constant current or constant power)” load model in these situations. Based on the characteristics of motor load slip trace, the paper proposes a slip trace equivalent load model. The slip coherency approach is utilized for load modeling and the Levenberg-Marquardt-Fletcher (LMF) method is exploited for load parameter identification. The proposed model can display the dynamic performance of motor load in all kinds of disturbances including the partial motor stalled conditions. The new model also provides an observation tool for partial motor stalled situations. Simulation results are presented in this paper to validate the proposed load model as well.