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All Journal Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control Lensa Ilmiah: Jurnal Manajemen dan Sumberdaya
Ramadani, Fahri
Unknown Affiliation
Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Social Sciences

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Harmonic Reduction Using THIPWM Switching Technique with Type-2 Fuzzy on 3-Phase Motor Murdianto, Farid Dwi; Wahdjono, Endro; Ramadani, Fahri
Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control Vol. 8, No. 4, November 2023
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/kinetik.v8i4`.1759

Abstract

The development of the increasingly advanced industrial world has increased the need and use of electric motors for various purposes. In the industrial world, many electric motors are found as a driving device to drive various equipment needed, including a three-phase induction motor. The induction motor is expected to operate normally by the desired working characteristics. But it is undeniable that in its use, there are disturbances that can cause damage to the work system of the Induction motor, one of which is harmonic interference. The influence of harmonics on the induction motor causes copper and core losses which will reduce the efficiency motor and cause harmonic torque along with fundamental torque to produce vibration and noise, which considerably affect the operation three-phase induction motor. In this study, a 3-phase inverter was used with the Third Harmonic Injection pulse width modulation (THIPWM) method, with the use THIPWM Switching Method expected to increase the output voltage three-phase inverter and reduce the harmonics caused by the three-phase induction motor. In optimizing a 3-phase induction motor's speed regulation, scalar control or voltage/frequency (v/f) regulation is used. With the use THIPWM switching on this three-phase inverter, it is evident from simulation results that the harmonic value of THDV is 55.62%. THDI is 19.04%, as well the acceleration 3-phase induction motor with a rise time value of 48.547ms with steady-state error of 0.08% at set point 1200 rpm and with rise time value of 52.938ms with steady-state error 0% at set point 1000 rpm.
Pengaruh Pergerakan Harga Bitcoin terhadap Efektivitas Saham Sektor Teknologi di Bursa Efek Indonesia Ramadani, Fahri; Slamet, Rokhmad; Firdaus, Ahmad
Lensa Ilmiah: Jurnal Manajemen dan Sumberdaya Vol. 4 No. 3 (2025): Lensa Ilmiah: Jurnal Manajemen dan Sumberdaya
Publisher : ELRISPESWIL - Lembaga Riset dan Pengembangan Sumberdaya Wilayah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54371/jms.v4i3.1089

Abstract

Penelitian ini mengkaji pengaruh pergerakan harga Bitcoin terhadap kinerja risiko-disesuaikan saham sektor teknologi yang terdaftar di Bursa Efek Indonesia (BEI) selama periode Januari 2021 hingga Desember 2024. Pendekatan kuantitatif dengan regresi linier sederhana digunakan, di mana harga Bitcoin berfungsi sebagai variabel independen dan kinerja saham, yang diukur menggunakan Sharpe ratio, sebagai variabel dependen. Hasil penelitian menunjukkan pengaruh positif yang tidak signifikan secara statistik dari harga Bitcoin terhadap kinerja risiko-disesuaikan saham sektor teknologi, dengan koefisien determinasi (R²) sebesar 0,052. Hal ini menunjukkan bahwa harga Bitcoin hanya menjelaskan 5,2% variasi kinerja saham, sementara faktor lain di luar model mempengaruhi sisanya. Temuan ini menegaskan bahwa meskipun pergerakan harga Bitcoin terkait dengan kinerja saham, faktor ini tidak menjadi penentu dominan. Sebaliknya, harga Bitcoin dapat berfungsi sebagai indikator tambahan dalam analisis pasar modal, yang menekankan pentingnya mempertimbangkan faktor makroekonomi yang lebih luas dalam pengambilan keputusan investasi.
Co-Authors Ahmad Firdaus, Ahmad Farid Dwi Murdianto Slamet, Rokhmad Wahdjono, Endro