This paper presents design and implementation of scalar control for 3 phase induction motor. This method leads to be able to adjust the speed of the motor by control the frequency and amplitude of the stator voltage of 3 phase induction motor, the ratio of stator voltage to frequency should be kept constant, which is called as V/F or scalar control of 3 phase induction motor drive. The proposed control system is used to generate control signals to overcome the nonlinear dynamics of 3 phase induction motor. Simulation results show that the 3 phase induction motor is able to track the frequency input shift via inverter with 50 Hz frequency get speed 2090.8 rpm. ABSTRAKMakalah ini menyajikan desain dan implementasi kontrol skalar untuk motor induksi 3 fasa. Metode ini dapat menyesuaikan kecepatan motor melalui pengendalian frekuensi dan amplitudo tegangan stator motor induksi 3 fasa, rasio tegangan stator terhadap frekuensi harus dijaga konstan, yang disebut sebagai kontrol V/F atau kontrol skalar motor induksi 3 fasa. Sistem kontrol yang diusulkan digunakan untuk menghasilkan sinyal kontrol yang dapat mengatasi dinamika nonlinier motor induksi 3 fasa. Hasil simulasi menunjukkan bahwa induksi motor induksi 3 fasa mampu melacak pergeseran masukan frekuensi via inverter dengan frekuensi 50 Hz mendapatkan kecepatan 2090,8 rpm.Kata kunci: kontrol skalar, 3 fasa, kontrol kecepatan, frekuensi, motor induksi
Information and Communication Technology (ICT) can improve the speed of information delivery, efficiency, global reach and transparency. One of the efforts to realize good corporate governance (GCG) governance in the era of regional autonomy is to use information and communication technology or popularly called e-Government. The implementation of e-Government the need for master plan information technology as a guide in the integration of information technology in Local Government, e-Government implementation is expected to help improve interaction between government, community and business, so as to encourage political and economic development. In this paper presents the determination of e-Government policy strategy using SWOT analysis method which is considered capable to analyze the relationship or interaction between internal elements, namely strengths and weaknesses, as well as against the external elements of opportunities and threats. The results of the analysis are: (1) The use of SWOT Analysis and Ideal Service Matrix in e-Government Policy Plan in local government is expected to give maximum support to accountability and transparency of bureaucracy towards Good Corporate Government; (2) This research resulted in the analysis of the preparation of e-Government master plan on the Regional Government of Tana Tidung Regency; and (3) A plan to utilize information technology in terms of marketing, production, product development and finance can be made. These results can be followed up with the use of information technology containing SWOT analysis in the development of e-Government in the Regional Government of Tana Tidung Regency.
Air merupakan salah satu elemen utama kehidupan makhluk hidup, sehingga semua mahluk hidup sangat memerlukan air. Untuk mencukupi kebutuhan air bersih pada masyarakat dapat menggunakan air hujan, air tanah dan lain-lain, penggunaan sumber air tanah perlu diketahui potensi jumlah maupun mutunya. Penyebaran air tanah dideskripsikan secara vertikal dan horizontal, deskripsi air secara horizontal dapat dilihat melalui penyebaran formasi geologi yang bertindak sebagai akuifer. Untuk mendapatkan kondisi hidrogeologi dan geologi perlu dilakukan kajian dengan menggunakan metode geolistrik melalui resistivity meter. Berdasarkan latar belakang tersebut, peneliti menerapkan keunggulan boost converter pada desain resistivity meter yang diusulkan. Konfigurasi Elektroda yang diterapkan dalam penelitian ini menggunakan metode Schlumberger dengan parameter yang terukur ialah arus listrik (I), beda potensial (V) dan spasi elektroda, sedangkan parameter yang dihitung adalah tahanan jenis ( ). Data hasil pengukuran diolah untuk didapatkan penampang model resistivity 1 dimensi (1D) bawah permukaan. Berdasarkan hasil eksplorasi geolistrik dan perhitungan-perhitungannya menunjukkan keberadaan akuifer air tanah pada kedalaman 6.54 -56.67 m dengan tahanan jenis 36.98 Ωm dan perkiraan litologi adalah pasir.
Seawater in Indonesia has considerable potential when used as a source of renewable energy. As it is known that sea water generally contains elements or levels of salt dissolved in it. Due to the presence of these elements or levels of salt, seawater has the potential to produce electrical energy. This is the reason why researchers want to do more in-depth research on this seawater battery. As it is known that several previous studies have conducted experiments using different methods in each research conducted. In this study, we will use several methods that have been there previously aimed at getting an increase in electrical energy that will be generated from marine batteries. This study uses a cross-section of electrodes in the form of copper and zinc by comparing several methods to get a seawater battery design that suits your needs. In this study, the seawater battery used pure seawater and without using an amplifier circuit or voltage booster. With a voltage that can be generated in each 1 cell, which is between 0.78 V and 0.82 V. Overall, this seawater battery has 10 cells arranged in series with each 1 cell consisting of 5 pairs of copper and zinc electrodes arranged in parallel.
A generator is an electrical machine that converts mechanical/motion energi into electrical energi. The performance of the generator is strongly influenced by the load, so when the load exceeds the generator limit, it is called overload disturbance. In this study, the author makes a generator load regulation sistem based on Internally Triggered TRIAC which functions to reduce the voltage value to the load automatically so that the current value can always be at the set point, which is 0.50 A. In this study, a resistive load in the form of an incandescent lamp with specifications of 100 W is used. As many as two and one 5 W incandescent lamp. For one 100 W incandescent lamp, the current value is 0.40 A and for one 5 W incandescent lamp, the current value is 0.06 A. When all loads are on, the current value ready by the sensor is 0.86 A so that the sistem responds to a load. More because the current value exceeds the set point. The sistem lowers the voltage value to 17.67 V so that the current value can always be at the set point of 0.50 A.
AbstrakTelah dibuat Dye Sensitized Solar Cell (DSSC) yang dapat mengkonversi cahaya menjadi energi listrik denan memanfaatkan Black Dye N-749 sebagai dye sensitizer dan bahan semikonduktor TiO2 sebagai penyusun photoelektroda yang terdeposisi pada kaca ITO dengan luasan 1 cm2. Variasi dilakukan pada proses pembuatan photoelektroda, dimana proses dimulai dari photoelektroda yang dibuat menjadi single/double layer TiO2 yang terdiri dari lapisan nanopartikel pada lapisan dasar, sedangkan lapisan atas tersusun atas partikel berukuran sub-mikro. Proses selanjutnya adalah kompresi mekanik pada lapisan semikonduktor dengan beban 25 kg/satuan luas. Proses diakhiri dengan perendaman photoelektroda dengan tujuan mengadsorpsi partikel dye pada lapisan TiO2. Perendaman dilakukan menggunakan proses ultrasonik dengan waktu 20 detik. Hasilnya menunjukan bahwa setelah dilakukan kombinasi dari ketiga treatment maka efesiensi DSSC mampu meningkat dari 0,028% menjadi 0,040%.Kata Kunci: Dye Sensitized Solar Cell (DSSC); Photoelektroda, Double Layer; Kompresi Mekanik;Perendapam Ultrasonik; Efesiensi Solar SellAbstractDye Sensitized Solar Cell (DSSC) which is able to convert light into electrical energy by using Black Dye N-749 as a dye sensitizer and TiO2 semiconductor material as a photoelectrode has been conducted on 1 cm2 ITO glass area. In the process, photoelectrodes made by variations of single layer and double layer TiO2 which nanoparticles TiO2 as main/base layer and top/second layer is sub-microparticles. In the next process, photoelectrodes was given mechanical compression with a load of 25 kg/unit area. The last process, photoelectrode was dipping in N-749 extracts with ultrasonic process for 20 seconds. The results show that combination of variation DSSC can increase produces efficiency from 0.028% to 0.040%.Keywords: Dye Sensitized Solar Cell (DSSC); Photoelectrode, Double Layer; Mechanical Compresion;Ultrasonic Dipping; Solar Cell efficiency
Kebutuhan dan permintaan masyarakat terhadap energi listrik sebagai penunjang untuk meningkatkan potensi dan daya tarik Sebuku sangat tinggi, sehingga terjadi krisis pasokan listrik dan sering dilakukan pemadaman listrik. Selama pemadaman listrik banyak aktivitas masyarakat Sebuku menjadi terhambat. Ketika terjadi pemadaman listrik di malam hari atau tidak adanya cahaya penerangan membuat pelajar menjadi sulit untuk mengerjakan pekerjaan rumahnya. Pedagang kaki lima mengalami hambatan dikarenakan susah dalam melakukan aktivitas, produksi dan kunjungan pelanggan ke toko menurun. Masyarakat biasanya menggunakan lilin sebagai pengganti alternatif lampu ketika terjadi pemadaman listrik. Namun, penggunaan lilin sangat beresiko mengakibatkan terjadinya kebakaran. Untuk itu kami memberikan sentuhan teknologi berupa pembuatan low cost inverter yang dapat dimanfaatkan sebagai mini inverter untuk menyalakan lampu sebagai solusi penerangan rumah huni saat terjadi pemadaman listrik. Low cost inverter dapat digunakan untuk menyalakan lampu atau alat elektronik lainnya dengan hanya menggunakan sumber baterai yang mempunyai tegangan 3.5 Volt. Hasil pelaksanaan kegiatan pembuatan alat pada daerah perbatasan menunjukkan dengan adanya low cost inverter masyarakat Sebuku sangat terbantu dalam bidang penerangan. Masyarakat mempunyai alat penerangan yang aman, sehingga tidak menimbulkan rasa khawatir terhadap bahaya kebakaran. Masyarakat dapat menjalankan aktivitas sehari-hari tanpa terganggu dengan pemadaman listrik.
This paper presents design and implementation of SMS Gateway utilization in water level monitoring system. The system used to determine the water level at the reservoir. Background of this research is many used manually water level monitoring system. Manual water level monitoring is considered to be less effective, because it uses water level measurements with a line and checks are required regularly. The proposed system of this research uses ultrasonic sensors to detect water heights and SMS Gateway module as a communication with its users. The results showed ultrasonic sensors can read the distance well done and accordance with the measurements have been done. Water level level monitoring system works well with water reservoir 15 cm then indicator system show full water.
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