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Abstrak :
Dalam rangka meningkatkan efisiensi energi, PT. KPI RU II Dumai melaksanakan Proyek Penggantian 2 (dua) Unit Driver Engine Pompa S. Rokan dengan motor listrik serta penambahan Variable Speed Drive (VSD). Dengan perubahan sistem driver tersebut, maka perlu dilakukan penyambungan listrik ke PLN 20 kV. Efisiensi yang berhasil dilakukan setara dengan nilai Rp31.941.504.000 / tahun atau total Rp766.596.096.000 selama 24 tahun dari usia proyek yang direncanakan. Berdasarkan Cost Benefit Analysis (CBA), proyek ini sangat layak dengan nilai keekonomian berdasarkan NPV sebesar USD 11.497.979 (Positif), IRR 76,51% (IRR>11,03%), PBT hanya dalam waktu 1,5 Tahun dan BCR sebesar 6,37 kali. Penerapan K3L dalam praktik keinsinyuran terdiri dari analisis bahaya dan dampak resiko serta bagaimana mengurangi dampak resiko tersebut. Penerapan kode etik, etika profesi dan profesionalisme dilakukan merujuk kepada Kode Etik Insinyur 2021 yang ditetapkan oleh Sidang Khusus Majelis Kehormatan Etik pada tanggal 18 Desember 2021 di Bali. ......In order to improve energy efficiency, PT. KPI RU II Dumai is carrying out the Replacement of 2 (two) Units of S. Rokan Pump Engine Driver Project with electric motor and the addition of Variable Speed Drive (VSD). By changing the driver system, it is necessary to connect electricity to PLN 20 kV. The efficiency that was successfully carried out is equivalent to a value of IDR 31,941,504,000 / year or a total of IDR 766,596,096,000 for 24 years from the planned project life. Based on the Cost Benefit Analysis (CBA), the project is very feasible with an economic value based on NPV of USD 11,497,979 (Positive), IRR of 76.51% (IRR> 11.03%), PBT only in 1.5 years and BCR of 6.37 times. The application of HSE in engineering practice consists of an analysis of hazards and the impact of risks and how to reduce the impacts of these risks. The application of the code of ethics, professional ethics and professionalism is carried out referring to the 2021 Engineer Code of Ethics which was determined by the Special Assembly of the Ethics Honorary Council on December 18, 2021 in Bali.

Abstrak :
Universitas Indonesia mengkonversi sebuah bus listrik (EV-BUS) dengan sumber energi dari baterai utama 384 VDC 300 AH dan baterai sekunder 25,8 VDC 100 AH. Tenaga diteruskan untuk penggerak utama 200 kW dengan motor BLDC, AC 15 kW, sistem kemudi hidrolik 7,5 kW, kompresor 4 kW untuk sistem pengereman, masing-masing dengan motor induksi, dan 2,4 kW untuk aksesori lainnya. Diharapkan daya listrik 7,5 kW ini dapat direduksi oleh sistem kemudi listrik hingga 20%. Penelitian ini dalam rangka konversi sistem kemudi hidrolik (HPS) menjadi sistem tenaga listrik (EPS). Sistem kemudi elektrik dipilih karena pengoperasiannya yang ringan dan kemudahan dalam pengontrolannya. Sistem kemudi elektrik ini menggunakan motor booster sebagai penggerak bantu pengemudi dalam menggerakkan batang kemudi. Posisi booster motor akan mempengaruhi bentuk gerak dinamis secara keseluruhan dari sistem EPS. Penelitian ini dimulai dengan pengumpulan data sistem kemudi pada kendaraan skala besar, untuk menijau perkembangan sistem kemudi elektrik khususnya pada jenis bus. Bus yang akan didata meliputi jenis bus dengan mesin pembakaran dalam dan juga bus listrik yang ada saat ini. Saat ini EV-Bus Molina UI menggunakan jenis hydraulic power steering yang akan dikonversi menjadi electric power steering. Perbedaan nyata antara kendaran ukuran kecil (city car) dan bus besar adalah jarak yang jauh dari kolom kemudi dan sumbu roda depan, yaitu sejauh 2380 mm, sekitar dua kali lipat dari kendaraan ukuran kecil. Struktur yang terlibat dalam sistem ini adalah wheel drive, steering column, lower steering column, rack and pinion gear, assist motor, drop link, drag link, drop link extension, drag link extension, tie rod, knuckle, kingpin, tyre, axle beam dan beberapa lainnya. Hubungan antar komponen-komponen ini dari roda kemudi sampai roda akan dijadikan sebagai dasar untuk mengembangkan model dinamik sistem kemudi pada EV-Bus ini. Nilai kekakuan, inersia, dan redaman setiap link akan mempengaruhi torsi pengemudi dan motor bantu sebagai fungsi kecepatan roda pada bus listrik ini. Struktur kemudi EV-Bus terdiri dari struktur truss dan struktur frame dengan mekanisme kinematik yang terdiri dari dua hubungan empat batang yang disatukan. Dalam keadan statik, roda depan menerima beban vertikal 60000 N, dengan koefisien gesek 0,7, diperlukan gaya pada tie rod sebesar 29.000 N. Pemilihan material S45C JIS 4051 ekivalen dengan KS 1045 aman untuk struktur kemudi ini. Tegangan von misses paling besar terjadi drop link extension sebesar 190,72 MPa dengan faktor keamanan terkecil sebesar 3. Dengan kecepatan belok roda depan sebesar sekitar 0,548 m/s, maka diperlukan minimal daya sebesar 3,3 kW. Jenis motor listrik sebagai assist motor adalah motor AC asynchronous dengan peletakkan motor pada tie rod ......University of Indonesia converted an electric bus (EV-BUS) with an energy source from a 384 VDC 300 AH main battery and a 25.8 VDC 100 AH secondary battery. Power is transmitted to the 200 kW prime mover with BLDC motor, 15 kW AC, 7.5 kW hydraulic steering system, 4 kW compressor for braking system, each with induction motor, and 2.4 kW for other accessories. It is expected that this 7.5 kW electric power can be reduced by an electric steering system by up to 20%. This research is in the context of converting a hydraulic steering system (HPS) into an electric power system (EPS). The electric steering system was chosen because of its light operation and ease of control. This electric steering system uses a booster motor as a driving force to assist the driver in moving the steering rod. The position of the booster motor will affect the overall dynamic form of the EPS system. This research begins with collecting steering system data on large-scale vehicles, to review the development of the electric steering system, especially on the type of bus. The buses that will be recorded include the types of buses with internal combustion engines as well as the current electric buses. Currently, the Molina UI EV-Bus uses a hydraulic power steering type which will be converted to electric power steering. The real difference between a city car and a big bus is the distance from the steering column and the front axle, which is 2380 mm, about twice that of a small vehicle. The structures involved in this system are wheel drive, steering column, lower steering column, rack and pinion gear, motor assist, drop link, drag link, drop link extension, drag link extension, tie rod, knuckle, kingpin, tire, axle beam. and some others. The structures involved in this system are wheel drive, steering column, lower steering column, rack and pinion gear, motor assist, drop link, drag link, drop link extension, drag link extension, tie rod, knuckle, kingpin, tire, axle beam. and several others. The relationship between these components from the steering wheel to the wheels will be used as the basis for developing a dynamic model of the steering system on this EV-Bus. The value of stiffness, inertia, and damping of each link will affect the torque of the driver and auxiliary motor as a function of wheel speed on this electric bus. The steering structure of the EV-Bus consists of a truss structure and a frame structure with a kinematic mechanism consisting of two four-bar linkages joined together. In the static state, the front wheel receives a vertical load of 60000 N, with a coefficient of friction of 0.7, the required force on the tie rod is 29,000 N. The material selection of S45C JIS 4051 equivalent to KS 1045 is safe for this steering structure. The greatest von misses stress occurs in drop link extension of 190.72 MPa with the smallest safety factor of 3. With a front wheel turning speed of about 0.548 m/s, a minimum power of 3.3 kW is required. The type of electric motor as an assist motor is an asynchronous AC motor with the motor placed on the tie rod.

Abstrak :
A fully up-to-date, hands-on guide to electric motorsKeep electric motors running at peak performance! Electric Motor Maintenance and Troubleshooting, Second Edition explains in detail how all types of AC and DC motors work. Essential for anyone who needs to buy, install, troubleshoot, maintain, or repair small to industrial-size electric motors, this practical guide contains new information on three-phase motors along with coverage of the latest test instruments.Drawing on his more than 40 years of experience working with electric motors, expert author Augie Hand provides a wealth of tested procedures to pinpoint and correct any kind of issue. He?ll help you decide whether to replace a motor, take it offline for repair, or repair it in place--decisions that can reduce down time. End-of-chapter questions reinforce the material covered in the book. Quickly and accurately diagnose electric motor problems and find effective solutions with help from this fully updated classic.Electric Motor Maintenance and Troubleshooting, Second Edition covers: Troubleshooting and testing DC machines AC electric motor theory Single-phase motors Three-phase induction motors Troubleshooting less common motors, including synchronous, two-speed one-winding, and multispeed Test instruments and servicesMachine generated contents note: Chapter 1 The DC Machine -- Chapter 2 Troubleshooting and Testing the DC Machine -- Chapter 3 AC Electric Motor Theory -- Chapter 4 The Single-Phase Motor -- Chapter 5 Three-Phase Induction Motor -- Chapter 6 Dual-Voltage Nine-Lead Motor?s Internal Connections -- Chapter 7 Troubleshooting the Nine-Lead Motor -- Chapter 8 Troubleshooting Less Common Motors -- Chapter 9 Test Instruments and Services.

Abstrak :
Dewasa ini jumlah pengguna kendaraan bermotor di Indonesia mengalami peningkatan yang signifikan dari tahun-ketahun. Korps Lalu Lintas Kepolisian Negara Republik Indonesia mencatat banyaknya jumlah kendaraan yang beroperasi pada 2013 mencapai 104,2 juta unit, sebanyak 86,25 juta unit di antaranya merupakan sepeda motor. Jumlah pengguna sepeda motor tersebut naik 12 persen dibanding tahun sebelumnya yang sebanyak 77,75 juta unit. Dengan memanfaatkan kondisi tersebut, para peneliti sudah mulai melakukan penelitian mengenai jenis pembangkit terbarukan yang ramah lingkungan mengacu pada peningkatan jumlah kendaraan di Indonesia dan salah satu penelitian yang sedang dikembangkan adalah marka kejut yang dapat menghasilkan energi listrik. Marka kejut dirancang dengan menggabungkan dua metode penghasil energi listrik yaitu generator listrik dan piezoelektrik. Prinsip kerja dari alat ini adalah memanfaatkan pergerakan tuas yang dapat menggerakan generator dan menekan material piezoelektrik sehingga dapat menghasilkan listrik. Dari hasil pengujian marka kejut yang dilakukan, pada generator listrik dapat menghasilkan daya listrik sebesar 0.43 Watt per sekali tekan, sedangkan material piezoelektrik dapat menghasilkan daya sebesar 22.9 μWatt per sekali tekan dalam waktu yang bersamaan. ...... A number of vehicles in indonesia always seen a significant increase every year. Traffic police corps of the republic of indonesia noted the large number of vehicles operations in 2013 reached 104,2 million units, some 86,25 million units of them are motorcycles . A number of users motorcycle were up 12 percent compared to last year as many as 77,75 million units. By using these conditions, researchers have started to conducted research a renewable power station with environmentally friendly reference to the increase in the number of vehicles and one of research is being developed is speed bump that can produce electrical energy. Speed bump designed by combining two methods of producing electrical energy, that is an electric generator and piezoelectric crystal, The working principle of this instrument is to harness the movement of a lever which can push the generator and pressing piezoelectric material. From the result of testing, electric generator of speed bump can generare power electricity at 0.43 Watt per tap and a piezoelectric of speed bump can produce power 22.9 μWatt per tap at the same time.