Design of Digital Twin System for DC Contactor Condition Monitoring

Digital twin technology provides insight to solve the problems of state monitoring and life evaluation of electromagnetic devices. When performing digital twin system design, it is necessary to face the challenges of multi-physical field and multi-scale modeling, dynamic time-varying parameters, and data interaction. In this paper, a digital twin system design scheme for DC contactors is proposed. The modeling approach describes and defines the model at three levels: geometric, mechanistic, and data. Based on the constructed model, the knowledge acquisition and data mapping processes of the contactor operation process are investigated. In addition, the fidelity assessment method of the digital twin model is given in order to evaluate the validity of the constructed model. The empirical validation shows that the proposed digital twin high-fidelity modeling method is effective and the model can be evaluated.