The analysis and application of residual voltage of AM after AC dump

Residual voltage of AM after AC dump (RVACD) is the universal phenomenon for induction motor. This paper has carried out study on the RVACD. It establishes simulation model for RVACD, then carries out simulation calculation. Based on this, the RVACD's mechanism, affecting factors, the changing rule of magnitude, frequency component and changing rule, etc are analyzed. Under rotor winding fault, induction motor will generate particular frequency component in RVACD. This is analyzed in this paper. The effort to diagnose rotor winding fault based on RVACD is studied in this paper. The experimental measurement is carried out to prove the research conclusions. They are basically in accordance with each other.