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Numerical Investigation and Experimental Modal Analysis Validation to Mitigate Vibration of Induction Machine Caused due to Electrical and Mechanical Faults

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Abstract

This paper presents the resonance issue of an aged induction motor to restrict the vibrations of the machine to a permissible limit. To mitigate the resonance problem, forced vibration analysis (FVA), natural frequency test (NFT), and experimental modal analysis (EMA) are implemented on an induction motor. FVA and NFT are performed to predict the prime cause of resonance and identify the mechanical fault in the motor casing which is not within the permissible limit. The resonance in the machine leads to an electrical fault. EMA is executed on the stator windings by considering 12 test points that help to determine the looseness of the windings. Using the numerical method and experimental methods, the problem of resonance is identified and resolved. As per ISO standards 10,816, the vibration velocity of the induction motor must be within 5 mm/s. In the induction motor under test, it is observed that the vibration velocity is 15.3 mm/s using numerical analysis which violates the ISO standards. Remodeling and redesign of induction motor are done numerically using ANSYS. These results yield the vibration velocity to be 4.4 mm/s which resolves the resonance.

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Abbreviations

FVA:

Forced vibration analysis

NFT:

Natural frequency test

EMA:

Experimental modal analysis

FEM:

Finite element method

ISO:

International organization for standardization

ODS:

Operational deflection shape

FRF:

Frequency response function data set

EDM:

Engineering data management

MDE:

Motor drive end

FFT:

Fast Fourier transform

MAC:

Modal assurance criteria

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Acknowledgements

The authors would like to thank “Flamboyant Solutions” for their valuable advice and significant support in performing the experimental work.

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  1. Department of Electrical Engineering, National Institute of Technology Raipur, Raipur, Chhattisgarh, India

    Kapu V Sri Ram Prasad & Varsha Singh

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  1. Kapu V Sri Ram Prasad
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  2. Varsha Singh
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Correspondence to Kapu V Sri Ram Prasad.

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Prasad, K.V.S.R., Singh, V. Numerical Investigation and Experimental Modal Analysis Validation to Mitigate Vibration of Induction Machine Caused due to Electrical and Mechanical Faults. J. Electr. Eng. Technol. 17, 2259–2273 (2022). https://doi.org/10.1007/s42835-022-01049-8

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  • DOI: https://doi.org/10.1007/s42835-022-01049-8

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