Desain dan Implementasi Z-Source Inverter 3 Fasa dengan Metode Simple Boost Control untuk Suplai Motor Induksi

Rifki Dwisetyo Wicaksono, Dedet Candra Riawan, Daniar Fahmi
Submission Date: 2017-01-16 13:33:11
Accepted Date: 2017-03-17 10:12:42

Abstract


Aplikasi dari energi terbarukan semakin banyak dikembangkan terutama penelitian mengenai photovoltaic dan fuel cell. Namun, kendala utama pada photovoltaic dan fuel cell yaitu memiliki tegangan keluaran yang rendah sehingga diperlukan sebuah konverter peningkat tegangan sebelum dapat diaplikasikan untuk inverter. Penggunaan inverter dengan penambahan topologi peningkat tegangan menyebabkan rugi – rugi konverter semakin besar. Selain itu, kendala utama pada topologi voltage source inverter yaitu tidak dapat beroperasi sebagai buck-boost konverter, diperlukannya dead time pada kontrol gate, dan kondisi shoot through zero state akan menyebabkan kerusakan pada inverter. Oleh karena itu, diperlukan desain topologi inverter yang memiliki kemampuan konversi boost dan tahan terhadap kondisi shoot through zero state. Z-Source inverter merupakan pengembangan dari voltage source inverter dengan penambahan rangkaian sumber impedansi dan kontrol penyalaan menggunakan simple boost control. Efisiensi Z-Source inverter dapat mencapai 88%. Faktor peningkatan tegangan dapat mencapai 2.4 kali dengan menggunakan shoot through duty ratio sebesar 16%. Z-Source inverter mampu mengontrol kecepatan motor induksi berdasarkan v/f konstan dengan cara merubah nilai shoot through duty ratio dan frekuensi fundamental. Jadi inverter ini sangat cocok untuk diaplikasikan sebagai topologi dengan kemampuan meningkatkan tegangan input dan digunakan sebagai kontrol kecepatan motor induksi.

Keywords


Motor Induksi; Simple Boost Control; Voltage Source Inverter; Z-Source Inverter

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