Performance analysis of rare-earth and rare-earth free external rotor motors under eccentricity faults

Bonthu, Sai Sudheer Reddy; Tarek, Tawhid Bin; Islam, Md. Zakirul; Choi, Seungdeog

doi:10.1109/apec.2018.8341437

Cited by 2 publications

(1 citation statement)

References 14 publications

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“…Induction motor malfunctions are classified into two types-mechanical malfunctions include eccentric rotor shafts, rotor cracks, and bearing cracks, while electrical malfunctions include shorted stator coils and unstable motor voltage. Statistically, malfunctions are most commonly due to [1][2][3] bearing faults (40%), followed by stator winding faults (38%), rotor faults (10%), and other parts (12%) [4][5][6]. The data reveal that problems frequently occur in the bearing because the structure of the rotor motor is designed to directly bear the load from the motor shaft.…”

Section: Introductionmentioning

confidence: 99%

Testing and Analysis Fault of Induction Motor for Case Study Misalignment Installation Using Current Signal with Energy Coefficient

Prainetr¹,

Tunyasrirut²,

Wangnipparnto³

2021

WEVJ

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An induction motor is a key device for an industrial machine. The installation misalignment of the motor will result in derating problems and energy consumption that is generally used to analyze signal faults using the fast Fourier transform (FFT) method. Problems with the rotor affect the non-stationary signal and FFT can be utilized to analyze this problem inefficiently. This paper proposed the testing and analysis of faults in an eccentric rotor at different levels using the stator current detection technique and the calculation of the energy signal coefficient via the wavelet decomposition (WD) method. The experimental results showed that an increase in eccentricity had a linear relation with the energy signal, where R2 was 80.81%. Moreover, the test results illustrated that the proposed method was more efficient than FFT and applicable to motor fault analysis and application in the industrial.

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