Induction machine current space vector features to effectively discern and quantify rotor faults and external torque ripple

Concari, Carlo; Franceschini, G.; Tassoni, C.

doi:10.1049/iet-epa.2011.0217

Cited by 35 publications

(40 citation statements)

References 19 publications

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“…For example, rotor asymmetries (such as broken bar breakages, broken end-rings, etc) generate oscillations of frequency [25]:…”

Section: Physical Bases Of the Proposed Approachmentioning

confidence: 99%

“…If the machine has rotor asymmetry, a series of new components associated to the fault appear in the stator current [25]. They can be modelled as an amplitude modulation of the healthy generator's current, with frequencies given by (1),…”

Section: Harmonic Order Tracking Analysis Of Generators Faultsmentioning

confidence: 99%

“…5) The spectrum of the projected current is computed (24). 6) The frequency axis of this spectrum is re-scaled using (25), so that each harmonic associated to the machine's fault in this harmonic order spectrum appear exactly at an integer harmonic order index (26). 7) The harmonic order spectrum is reduced by keeping only the amplitudes of the components with integer harmonic order.…”

Section: Harmonic Order Tracking Analysis Of Generators Faultsmentioning

confidence: 99%

See 2 more Smart Citations

Harmonic order tracking analysis: A novel method for the diagnosis of induction generators

Sapena-Bañó

Pérez-Cruz

Pineda-Sánchez

et al. 2014

2014 International Conference on Electrical Machines (ICEM)

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Improved fault diagnostic techniques in wind turbines is a field of growing interest, given the negative impact that unexpected breakdowns have on the profitability of wind farms. New diagnostic techniques based on generator currents monitoring have recently been developed, but their use is still irrelevant despite the advantages that current monitoring presents versus monitoring vibrations. In part, this situation can be due to the needs of relatively high computing power not available in the wind-groups and also, to the use of signals that generate volumes of data difficult to transfer to control centers, where they could be processed. This paper introduces a methodology that aims to solve these problems.In this paper a novel diagnostic method based on monitoring the generator currents is proposed. This approach is based on the tracking analysis of the fault components using the harmonic order as independent variable. This approach can be implemented in low cost digital devices; the resultant patterns are very simple, since their shape is the same no matter the changes in the fundamental frequency and thus, are easily interpretable even by non-qualified persons. Moreover these patterns are characterized by a very low number of parameters, which make easy their transmission to remote control centers. This new approach is theoretically justified and validated by laboratory tests.

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“…For example, rotor asymmetries (such as broken bar breakages, broken end-rings, etc) generate oscillations of frequency [25]:…”

Section: Physical Bases Of the Proposed Approachmentioning

confidence: 99%

Section: Harmonic Order Tracking Analysis Of Generators Faultsmentioning

confidence: 99%

Section: Harmonic Order Tracking Analysis Of Generators Faultsmentioning

confidence: 99%

See 1 more Smart Citation

Harmonic order tracking analysis: A novel method for the diagnosis of induction generators

Sapena-Bañó

Pérez-Cruz

Pineda-Sánchez

et al. 2014

2014 International Conference on Electrical Machines (ICEM)

View full text Add to dashboard Cite

show abstract

“…In recent years, several techniques have been proposed for discriminating these two effects from each other [3][4][5][6][7][8][9][10]. In [3], by observing space harmonics, broken rotor failures and low-frequency load fluctuations are discerned from each other.…”

Section: Introductionmentioning

confidence: 99%

“…Using reactive Park's vector spectrum, broken rotor bar failure is detected. In [7], broken rotor bar failures and load torque oscillation are separated by considering the angular displacement of active and reactive parts of the current space vector. A method based on combined analysis of the amplitude and phase spectra of the instantaneous active and reactive powers is suggested in [8].…”

Section: Introductionmentioning

confidence: 99%

Detection of rotor fault in three-phase induction motor in case of low-frequency load oscillation

2015

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This paper proposes a method for the separation of broken rotor bar failure and low-frequency load fluctuation in line-fed three-phase induction motor. In practice, the presence of load fluctuation at 2s f s has the same effect on a stator current of induction motor as a broken rotor bar fault. In such cases, the detection of broken rotor bar failure becomes difficult. To discern rotor fault and load oscillations, the analytical signal angular fluctuation (ASAF) method, which is a combination of Hilbert transform and the space vector angular fluctuation method, is used. The presented experimental results prove that low-frequency load oscillation and rotor fault can reliably be discriminated using the ASAF signal spectrum.

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An analytical model for squirrel cage induction machine with broken rotor bars derived based on the multiple coupled circuit theory and the winding function approach

Guo

Zhang

et al. 2021

Circuit Theory & Apps

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In this paper, a squirrel cage induction machine (SCIM) with broken rotor bars is modeled by using the multiple coupled circuit theory and the winding function approach. This analytical model includes all the spatial harmonic components of air gap magnetomotive force and is applicable to the study of transient machine behaviors. Equivalent circuits that are consistent with the topologies of healthy and faulty cage rotors are developed. The equivalent circuit for the healthy rotor of a SCIM having an integer number of rotor bars per pole is simplified further by exploiting the symmetry of the winding functions of the stator. In the equivalent circuit for a healthy rotor, inserting an independent current source in the bar that breaks in the damaged rotor, whose current

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Induction machine current space vector features to effectively discern and quantify rotor faults and external torque ripple

Cited by 35 publications

References 19 publications

Harmonic order tracking analysis: A novel method for the diagnosis of induction generators

Harmonic order tracking analysis: A novel method for the diagnosis of induction generators

Detection of rotor fault in three-phase induction motor in case of low-frequency load oscillation

An analytical model for squirrel cage induction machine with broken rotor bars derived based on the multiple coupled circuit theory and the winding function approach

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