Eliminating Load Oscillation Effects for Rotor Eccentricity Detection in Closed-Loop Drive-Connected Induction Motors

Detection of Eccentricity Faults in Induction Machines Based on Nameplate Parameters

“…Such knowledge will help reduce machine downtime and labor cost in terms of isolating the cause of the fault. Additionally, these components are also influenced by time-or position-varying load [8], [9]. Also, it will be shown later in Section IV that the low-frequency sidebands cannot always predict eccentricity reliably if the nonpredominant eccentricity is low.…”

“…Although substantial research has been conducted in this area with regard to the effect of load on low-frequency sidebands with mixed eccentricity [8], [9]; pure dynamic eccentricity [10]; a thorough FE study of mixed eccentricity [11]; stray flux [12]; increase in transient leakage reactance [13]; detection of mixed eccentricity using complex apparent power for utility [14] and inverter-fed drives [15]; Hilbert transform and motor current demodulation analysis [16], [17]; fuzzy logic [18]; spectrum analysis of stator current, voltage, and stator direct-axis current of a dual stator induction motor for eccentricity faults [19]; discrete-wavelet-transform-based MCSA of mixed eccentricity [20]; reluctance mesh modeling of induction motor with eccentricity [21]; noise reduction in mixed eccentricity fault detection using autocorrelation [22]; and their detection in motors driven from voltage source inverter-pulse width modulated inverters [23], [24], this basic issue is yet to be resolved. More literature surveys in the area of eccentricity-fault diagnosis of brushless dc motors using analytic wavelet ridge [25] and using FE analysis of permanent-magnet synchronous motors [26] and regular synchronous machines [27], [28] also did not reveal anything significant.…”

Cage-rotor induction motor inter-turn short circuit fault detection with and without saturation effect by MEC model

“…In several papers [13][14][15][16][17][18][19], WFA and FEM was vastly employed to compute the inductance and to diagnose the faults and also to monitor the electrical machine behavior. In other papers, WFA was utilized to study the unbalanced magnetic pull (UMP) [20] and also FEM was used to perform the spectral analysis of machine parameters to diagnose the fault [21,22]. In [23], the closed-slot effect on the harmonics of the electrical machines has been studied and in [24], the stator current signatures were studied for cage rotor induction machines.…”

Slot Numbering and Distributed Winding Effects Analysis on the Torque/Current Spectrum of Three-phase Wound-rotor Induction Machine Using Discrete Modeling Method

“…Inductance computation [13] and fault diagnosis [14,15] are two possible outcomes of applying the mentioned methods; furthermore, monitoring the condition of electrical machines by the WFA and FEM were investigated in many works [16][17][18][19]. In other work, unbalanced magnetic pull (UMP) was addressed by the WFA [20], and spectral analysis of machine parameters were considered for fault diagnosis based on FEM analysis [21,22]. In [23], the closed-slot effect was studied on electrical machines harmonics, and stator current signatures were studied for cage rotor induction machines in [24].…”