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.
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