| NIM | H1A015036 |
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| Namamhs | RAIHAN FARIS AHADYA |
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| Judul Artikel | Analisis Pengaruh Overlap Time Pada Unjuk Kerja Variable Speed Drive Motor Induksi Tiga Fase |
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| Abstrak (Bhs. Indonesia) | Motor induksi tiga fasa digunakan sebagai penggerak utama mesin-mesin di dunia industri. Dikarenakan motor induksi mempunyai beberapa keuntungan. Namun yang menjadi pertimbangannya adalah sistem pengaturan kecepatannya sangat mempengaruhi efisiensinya. Sebagian besar alat yang digunakan sebagai pengatur kecepatan putaran motor induksi tiga fasa adalah Variable Speed Drive (VSD). Variable speed drive menggunakan rangkaian Inverter. Salah satu jenis inverter yaitu current source inverter (CSI) lima tingkat yang dihubungkan pada motor induksi tiga fasa. Untuk menghindari keadaan open circuit perlu dilakukan penambahan rangkaian overlap guna memberikan waktu tunda outgoing saklar ketika beralih dari posisi ON ke OFF sehingga akan terjadi overlap, untuk memastikan bahwa saklar yang akan aktif telah ON ketika outgoing saklar dalam posisi OFF. Pada penelitian ini, dilakukan variasi overlap time pada inverter sumber arus lima tingkat tiga fase. Dalam penelitian ini akan dijelaskan bagaimana meminimalisir efek negatif dari penambahan overlap time pada inverter. Pada pengujian overlap time CSI lima tingkat diberikan variasi overlap time dari 0 µs hingga 6 µs. Pada pengujian ini didapat bahwa semakin besar waktu overlap, semakin besar nilai THD dari arus keluaran inverter dan tentunya juga berpengaruh pada ripple torsi motor induksi tersebut. Adapun untuk meminimalisir efek negatif dari overlap time, diberikan suatu kompensasi overlap time. Metode kompensasi yang digunakan adalah dengan menggunakan 2 sinyal carrier segitiga. Pada salah satu puncak bawah dari segitiga, diperpanjang sesuai besar kompensasi. Sehingga puncak bawah dari segitiga tersebut melewati DC offset semula dan mengcross-over segitiga dibawahnya. Metode kompensasi ini sangat efektif dalam meminimalisir efek negatif dari pemberian overlap time yakni dapat menurunkan nilai THD dari arus keluran inverter dan ripple pada torsi sehingga arus dapat mengalir secara maksimal karena inverter disini berfungsi sebagai stator pada motor induksi. |
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| Abtrak (Bhs. Inggris) | Three phase induction motor is used as the main driver of engines in the industries. Because an induction motor has several advantages. But the consideration is that the speed regulation system greatly affects its efficiency. Most of the tools used as three-phase induction motor speed regulators are Variable Speed Drives. Variable speed drives use an inverter circuit. One type of inverter is a five-level current source inverter which connected to a three phase induction motor. To avoid the open circuit, an overlap circuit is needed to give the switch outgoing delay when switching from the ON position to OFF so that there will be an overlap, to ensure that the switch that is active is ON when the outgoing switch is OFF. In this study, overlap time variations were carried out on five-stage three-phase current source inverters. In this study, it will be explained how to minimize the negative effects of adding overlap time to the inverter. In the overlap time test CSI five levels were given overlap time variations from 0 us to 6 us. In this test it is found that the greater the overlap time, the greater the THD value of the inverter output current and of course also affects the induction torque ripple. As for minimizing the negative effects of overlapping time, a compensation for overlap time is given. The compensation method used is to use 2 triangular carrier signals. On one of the lower peaks of the triangle, extended according to the amount of compensation. So that the bottom peak of the triangle passes through the original DC offset and crosses the triangle below it. This compensation method is very effective in minimizing the negative effects of overlapping time which can reduce the THD value of the inverter and ripple flow currents at torque so that the current can flow optimally because the inverter here functions as a stator on the induction motor |
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| Kata kunci | variable speed drive, current source inverter, motor induksi, overlap time |
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| Pembimbing 1 | Dr. Eng. Suroso, S.T., M.T. |
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| Pembimbing 2 | Eko Murdyantoro AM, S.T., M.T. |
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| Pembimbing 3 | |
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| Tahun | 2019 |
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| Jumlah Halaman | 12 |
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| Tgl. Entri | 2019-02-26 22:59:48.737686 |
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