Slip and Thermal Response in a 1 HP Three-Phase Motor Under Progressive Mechanical Load at 220 V
DOI:
https://doi.org/10.61236/wa0vty13Keywords:
Electrical machines, three-phase induction motorsthree-phase induction motors, slip, heat transfer, thermal regimeAbstract
This study examined the slip and thermal response of a 1 hp, 12-lead, three-phase induction motor operated at 220 V and subjected to a progressive mechanical loading program. The experimental test was designed in five stages, ranging from no-load operation to operation near the rated current, with each stage lasting 120 min and rotational speed and surface temperature of the motor housing recorded every 10 min. Slip was calculated from the measured speed, while housing temperature was used as an indicator of the motor’s thermal evolution. The results showed that, as the applied load increased, the average current progressively increased, rotational speed decreased, slip increased, and temperature rose steadily. Within the experimental range analyzed, slip allowed the operating conditions to be distinguished more clearly than average speed considered in isolation, whereas temperature exhibited a progressive and cumulative response dependent on load level and exposure time. Overall, the results showed a consistent relationship between changes in the motor’s mechanical operating state and its thermal evolution, confirming the usefulness of jointly analyzing both variables for the operational characterization of three-phase induction motors under progressive loading
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