2026-06-19T13:04:04Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/99482025-01-18T01:05:27Zcom_10259_9931com_10259_4266com_10259.4_106com_10259_2604col_10259_9932

00925njm 22002777a 4500 dc Fernández Cavero, Vanesa author Pons Llinares, Joan author Duque Pérez, Óscar author Morinigo Sotelo, Daniel author 2021-03 The problem of detecting and quantifying bar breakage harmonics in inverter-fed induction motors has not been solved by the time–frequency transforms present in the technical literature. The paper proposes a new transform, called dragon transform, to solve this problem. The dragon atoms are defined with shapes perfectly adapted to the harmonic trajectories in the time–frequency plane, no matter how complex they are, enabling the precise tracing of the harmonics to be detected. A quantification method is also proposed, which obtains for the first time in the technical literature, the time evolutions of the harmonic amplitudes during a complex transient such as the start-up and the steady state of an inverter-fed motor. The transform performance is validated testing the induction motor under different load levels. 0019-0578 http://hdl.handle.net/10259/9948 10.1016/j.isatra.2020.10.020 Time–frequency analysis Transient analysis Fault diagnosis Broken rotor bar Induction motors Inverter Detection and quantification of bar breakage harmonics evolutions in inverter-fed motors through the dragon transform