20.500.12556/RUL-167729 Detection of broken rotor bars in presence of load oscillations In industrial applications, the reliable performance of induction motors (IM) is essential. This paper proposes an improved method to distinguish between broken rotor bar (BRB) faults and load oscillations (LO) by analyzing stator current components in the rotor-flux reference frame. The approach employs a diagnostic fault indicator based on the amplitude ratio of current oscillations in the direct and quadrature axes, with a threshold established through simulation data and a support vector classifier (SVC). If the detected spectral peak pair corresponds to a BRB, the fault indicator exceeds the threshold. Conversely, peaks caused by LO result in an indicator value significantly below this threshold. The explicit and unambiguous separation between BRB and LO effects allows for the practical recommendation of a unity threshold. Simulations and experimental results validate the method’s robustness, demonstrating accurate fault identification even under challenging conditions, such as lightly loaded motors with a single BRB. The method relies solely on current and voltage measurements, avoiding the need for speed sensors. With low computational demands, it integrates seamlessly into existing motor drive systems. These features make it a practical and cost-effective tool for real-time fault detection and predictive maintenance in industrial settings. broken rotor bars fault detection induction machine motor current signature analysis support vector machine classification rotors bars mathematical models oscillators monitoring voltage measurement time-frequency analysis steady-state amplitude modulation voltage zlomljene rotorske palice detekcija napake asinhronski stroj metoda podpornih vektorjev true false true Angleški jezik Slovenski jezik Članek v reviji 2025-03-10 10:08:24 2025-03-10 10:08:24 2026-01-27 13:56:14 0000-00-00 00:00:00 2025 0 0 Str. 40012-40027 Vol. 13 2025 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 621.313/.314 2169-3536 10.1109/ACCESS.2025.3546705 228049411 Detection_of_Broken_Rotor_Bars_in_Presence_of_Load_Oscillations.pdf Detection_of_Broken_Rotor_Bars_in_Presence_of_Load_Oscillations.pdf 1 F3170D47B14C1F280E127DED23B460FC 535924ff84070b9638d3820dd47cb85938c8ae2a07287960b1aa30fd83160a1a 635eae5f-fd8e-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200454 https://ieeexplore.ieee.org/document/10908227 1 41458ef4-fd8e-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200453 Fakulteta za elektrotehniko 0 0 0