In the field of industrial equipment maintenance and monitoring, motor health monitoring plays a crucial role. This study conducts a systematic analysis of the current characteristics of three-phase induction motors, utilizing statistical indicators such as mean, median, and range to thoroughly investigate operational characteristic differences between normal and damaged states. The damaged motor's three-phase current range ratio is approximately 4.7 times that of a normal motor, with the average deviation ratio exceeding 10% during specific periods, indicating significant instability. Among the phase current characteristics, the R-phase shows the most pronounced changes with a notable decrease in mean value during later stages, the S-phase exhibits relatively minor effects, while the T-phase demonstrates periodic characteristics and significant fluctuations in later stages, with a damage ratio reaching 5.46%. The research finds that using a 50-data-point sampling method effectively reveals the current characteristics of damaged motors. Median current analysis provides a more stable reflection of damage trends compared to mean values and eliminates extreme value influences. Through bilateral and three-phase current cross-comparisons, the damaged motor's two-phase and three-phase current ranges exhibit distinct variations. The research findings provide crucial reference criteria for motor fault diagnosis and can be applied to the development of predictive maintenance systems. Through real-time monitoring and analysis of three-phase currents, equipment failure can be effectively prevented, thereby enhancing industrial production reliability and efficiency.
