Deteksi Kerusakan Batang Rotor Pada Motor Induksi Tiga-Fasa Menggunakan Analisis Bi-Spectrum

Rabbani, Insan (2016) Deteksi Kerusakan Batang Rotor Pada Motor Induksi Tiga-Fasa Menggunakan Analisis Bi-Spectrum. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tugas Akhir ini membahas teknik deteksi kerusakan batang rotor pada motor induksi yang berbasis bi-spectrum. Metode Bi-spectrum diaplikasikan pada sinyal arus stator dengan tingkat pembebanan yang bervariasi. Bi-spectrum termasuk ke dalam Higher Order Spectral (HOS), khusunya orde tiga yang diuraikan dengan Transformasi Fourier dengan hasil output berupa contour bi-specrum dari sinyal arus stator dan spectrum bicoherence. Deteksi kerusakan batang rotor (BRB) pada motor induksi berbasis bi-spectrum lebih akurat dibandingkan dengan teknik lain karena bi-spectrum memiliki sensivitas yang lebih tinggi terutama saat motor induksi dioperasikan dalam pembebanan yang rendah sehingga dapat membedakan secara jelas antara batang rotor yang sehat dengan batang rotor yang rusak. Deteksi BRB berdasarkan contour bi-spectrum kurang efektif sehingga diperlukan normalisasi bi-spectrum (bicoherence). Deteksi BRB berdasarkan spectrum bicoherence mampu mendeteksi frekuensi baru yang timbul akibat BRB yang disebut dengan fenomena quadratic phase coupling. ================================================================================== This thesis focuses on broken rotor bar detection by using bispectrum. Bi-spectrum method is applied on stator current signal with various load condition. Bi-spectrum is included in Higher Order Spectral (HOS) class, specifically is the third order which is described by Fourier Transform and it results bi-spectrum contour of stator current signals and bicoherence spectrum. Broken rotor bar detection in induction motor by using bi-spectrum is more accurate than other techniques, because bispectrum has higher sensitivity especially when induction motor is operating at low load levels. Hence, bi-spectrum can distinguish between healthy and broken rotor bar evidently. BRB detection based on contour bi-spectrum is less effective so bi-spectrum normalization (bicoherence) is needed. BRB detection based on spectrum bicoherence is able to detect new frequencies that generated because BRB which is called quadratic phase coupling phenomenon.

Item Type: Thesis (Undergraduate)
Additional Information: RSE 621.313 6 Rab d
Uncontrolled Keywords: Motor Induksi; Kerusakan Batang Rotor; BRB; Bispectrum; Bicoherence; Higher Order Spectra (HOS); Quadratic Phase Coupling; Induction motor; Broken Rotor Bar; Bi-spectrum
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions: Faculty of Industrial Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User: Mrs Anis Wulandari
Date Deposited: 09 Jun 2017 03:45
Last Modified: 27 Dec 2018 06:37
URI: https://repository.its.ac.id/id/eprint/41558

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