Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Evaluation of sound quality in faults of single-phase induction motors generated in a manufacturing process
Submission Author:
Gabriel Brandão Santos , SC
Co-Authors:
Gabriel Brandão Santos, Erasmo Felipe Vergara, Danilo da Silva Toniato, Henrique Silveira
Presenter: Gabriel Brandão Santos
doi://10.26678/ABCM.COBEM2023.COB2023-1130
Abstract
This study investigated the behavior exhibited by sound quality metrics obtained from single-phase induction motors under four different operating conditions, consisting of motors with three types of commonly found manufacturing faults in end-of-line tests from a manufacturer, as well as non-defective motors. 213 motors spanning the four groups were selected from this manufacturer. For each condition, a sample with a specific number of motors was taken. Sound quality metrics like loudness, sharpness, fluctuation strength, roughness, Aures tonality, and prominence ratio (PR) were calculated. The results were statistically evaluated to characterize the samples from each condition and assess their distribution and dispersion. The metrics responded differently to the conditions, with bracing tape faults showing higher average content of loudness and sharpness, the flawless motor standing out with more expressive quantities of tonality-related metrics, and bearing faults being well characterized by roughness. Most of the metrics calculated for lacing cord faults presented intermediate results. Non-parametric tests were applied to determine if the differences found between the groups are statistically significant and can be generalized to the representative populations of each condition. The study led to the conclusion that the metrics can distinguish the analyzed conditions, making them attractive for application in automated methods for diagnosing faults in the types of motors investigated in this research.
Keywords
sound quality, electric motors, psychoacoustics, Fault Detection
