Rancang Bangun Simulator Monitoring Getaran untuk Deteksi Kondisi Unbalance pada Motor Induksi 3 Fasa

Faizin, Zainullah Tiarestu Faizin (2026) Rancang Bangun Simulator Monitoring Getaran untuk Deteksi Kondisi Unbalance pada Motor Induksi 3 Fasa. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ketidakseimbangan (unbalance) pada motor induksi dapat meningkatkan getaran dan mempercepat keausan komponen. Proyek akhir ini merancang dan membangun simulator monitoring getaran untuk mendeteksi kondisi unbalance pada motor induksi 3 fasa. Sistem melakukan akuisisi data menggunakan accelerometer ADXL345 untuk mengukur percepatan getaran (m/s2) dan rotary encoder E6B2-CWZ6C untuk mengukur kecepatan putaran (RPM). Pengujian dilakukan dengan pengaturan kecepatan melalui VFD pada kondisi normal serta unbalance dengan variasi massa dan sudut, yaitu 7 g pada 0°, 7 g pada 0° dan 90° (total 14 g), serta 7 g pada 0° dan 180° (total 14 g). Data getaran dianalisis menggunakan Fast Fourier Transform (FFT) untuk mengamati perubahan spektrum frekuensi dan amplitudo. Hasil validasi menunjukkan ADXL345 memiliki error rata-rata 2,48% (akurasi 97,52%), sedangkan rotary encoder E6B2-CWZ6C memiliki error rata-rata 0,04% (akurasi 99,96%). Pada kondisi normal, spektrum FFT tidak menunjukkan puncak amplitudo dominan pada frekuensi 1×RPM. Sedangkan, pada kondisi unbalance muncul puncak dominan pada 1×RPM dan amplitudonya meningkat seiring kenaikan putaran; amplitudo tertinggi diperoleh pada 1506 RPM (25,78 Hz). Konfigurasi 0°–90° menghasilkan amplitudo lebih besar dibanding variasi 0° karena massa total yang lebih besar dan distribusi massa pada dua sudut, sedangkan konfigurasi 0°–180° menghasilkan amplitudo lebih rendah karena gaya sentrifugal cenderung saling meniadakan. Dengan demikian, simulator yang dikembangkan mampu membedakan kondisi normal dan unbalance serta menunjukkan pengaruh variasi massa dan sudut terhadap karakteristik getaran motor induksi.
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Unbalance in induction motors can increase vibration levels and accelerate component wear. This final project designed and built a vibration monitoring simulator to detect imbalance conditions in a three-phase induction motor. The system acquires data using an ADXL345 accelerometer to measure vibration acceleration (m/s²) and an E6B2-CWZ6C rotary encoder to measure rotational speed (RPM). Testing was conducted by controlling motor speed with a VFD under normal conditions and under imbalance conditions with variations in mass and angular position: 7 g at 0°, 7 g at 0° and 90° (total 14 g), and 7 g at 0° and 180° (total 14 g). Vibration data were analyzed using the Fast Fourier Transform (FFT) to observe changes in frequency spectra and amplitude. Validation results show that the ADXL345 has an average error of 2.48% (accuracy 97.52%), while the E6B2-CWZ6C rotary encoder has an average error of 0.04% (accuracy 99.96%). Under normal conditions, the FFT spectrum does not exhibit a dominant amplitude peak at 1×RPM. In contrast, under imbalance conditions, a dominant peak appears at 1×RPM, and its amplitude increases with rotational speed; the highest amplitude was obtained at 1506 RPM (25.78 Hz). The 0°–90° configuration produced a higher amplitude than the 0° variation due to the larger total mass and mass distribution at two angles, whereas the 0°–180° configuration resulted in a lower amplitude because the centrifugal forces tend to cancel each other. Therefore, the developed simulator can distinguish normal and imbalance conditions and demonstrates the effect of mass and angular variations on the vibration characteristics of an induction motor.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Motor induksi 3 fasa, Unbalance, Monitoring getaran, ADXL345, Rotary Rncoder E6B2-CWZ6C, FFT. Three-phase induction motor, Unbalance, Vibration monitoring, ADXL345, Rotary Encoder E6B2-CWZ6C, FFT.
Subjects:	T Technology > T Technology (General) > T57.5 Data Processing T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis T Technology > TA Engineering (General). Civil engineering (General) > TA355 Vibration. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2785 Electric motors, Induction.
Divisions:	Faculty of Vocational > Instrumentation Engineering
Depositing User:	Zainullah Tiarestu Faizin
Date Deposited:	04 Aug 2026 01:40
Last Modified:	04 Aug 2026 01:40
URI:	http://repository.its.ac.id/id/eprint/142739

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