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Atmam Atmam
Teknik Elektro Universitas Lancang Kuning
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Analisis Arus Start Dan Torka Motor DC Shunt Saat Berbeban Saprianto Saprianto; Atmam Atmam; Hazra Yuvendius
JURNAL TEKNIK Vol. 16 No. 1 (2022): Edisi April 2022
Publisher : JURNAL TEKNIK UNILAK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/teknik.v16i1.6229

Abstract

Motor DC shunt merupakan salah satu mesin listrik yang berfungsi mengubah energi listrik menjadi energi mekanik. Pada motor DC shunt terdapat kumparan medan pada stator dan kumparan jangkar pada rotor. Kedua kumparan tersebut dihubung paralel dengan sumber tegangan. Pada kedua kumparan tersebut mengalir masing-masing arus medan dan arus jangkar. Pada tugas akhir ini penelitian dilakukan pada motor DC dengan penguatan terpisah diubah menjadi motor DC penguatan sendiri hubungan shunt dengan tujuan untuk mengetahui karakteristik motor saat starting dan saat diberikan pembebanan. Metode pengaturan kecepatan yang digunakan adalah metoda pengaturan fluks (flux control method) yaitu dengan mengatur arus medan menggunakan r rheostat tahanan medan. Pada percobaan tanpa beban dilakukan variasi tegangan 40 Volt – 100 Volt dengan tahanan medan maksimum 80,10 Ohm. Pada percobaan berbeban dilakukan pada tegangan nominal 100 Volt dengan mengkopel motor dengan generator yang diberi beban resistif. Setelah dilakukan penelitian didapatkan hasil efisiensi motor saat generator berbeban 500 Watt adalah sebesar 72,49 % dengan daya input 528 Watt dan torka jangkar 2,35 N.m pada putaran motor 1604 RPM .
Evaluasi Kinerja Motor Coal Feeder Di PLTU Tenayan Raya Terhadap Pengaruh Perubahan Frekuensi Dedi Noviandri; Elvira Zondra; Atmam Atmam
JURNAL TEKNIK Vol. 16 No. 1 (2022): Edisi April 2022
Publisher : JURNAL TEKNIK UNILAK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/teknik.v16i1.6987

Abstract

Induction motor is an AC type motor that works due to the induced stator current as a result of the relative difference between the rotor rotation with the rotating field produced by the stator current. Induction motor is called asynchronous motor because the rotation of the motor shaft is not the same as the rotation of the stator magnetic field. Coal feeder motor is a three-phase induction motor whose speed regulation is regulated by ‘Variable Speed Drive (VSD)’. The coal feeder motor functions as a conduit for the distribution of coal fuel into the combustion chamber in the boiler which aims to process the combustion in heating water in the pipe wall (walltube) which will be used as steam driving the turbine. Before supplying coal, pay attention first to the amount of coal entering the coal feeder, because it will affect coal flow and motor performance. The more coal that enters the coal feeder, the greater the flow of coal, as well as the high speed of the motor will increase the flow of coal into the furnace. From the research results, a frequency of 4 Hz obtained coal feeder motor speed at 115.2 rpm, with an induction torque of 7.89 Nm, coal flow of 17.16 t/h and efficiency of 32.76% and a frequncy of 10 Hz obtained coal feeder motor speed of 288 rpm with induction torque of 4.48 Nm, coal flow of 42.9 t/h and efficiency of 41.7%.
Co-Authors Dedi Noviandri Elvira Zondra Hazra Yuvendius Saprianto Saprianto