A Closed Loop Speed Control of Induction Motor Fed by a Quasi Z-Source Inverter Based on V/F Control
Publish place: 2nd Conference on Electrical and Computer Engineering Distributed Systems and Smart Grids
Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ELECONFK02_093
تاریخ نمایه سازی: 26 شهریور 1395
Abstract:
This paper proposes a new closed loop speed control of an induction motor fed by a quasi Z-source inverter (qZSI), the speed control is based on V/F control. Quasi Z-source inverter is a recently developed topology derived from Z-source inverter (ZSI). qZSI is a one-stage power conditioner that employs a capacitor-inductor network for connecting inverter to the DC source. In this paper, through addressing detailed dynamic modeling of qZSI , qZSI is used for connecting the DC source to a induction motor. A closed loop controller is designed to control the peak dc link voltage of the qZSI, where the peak dc-link voltage is estimated by measuring the input and the capacitor voltages. By using the dynamic model of qZSI, the proper controller for the DC side is designed. The proposed speed control system compared with the standard adjustable speed drives (ASD), are able to change the motor speed from zero to the rated speed with the rated load torque. Also the qZSI inverter system provides ride-through capability during voltage sags, reduces line harmonics, improves power factor and reliability, and extends output voltage range. Simulation results are provided to demonstrate the competence of the system.
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Authors
Ali Reza Mosaddeghian
Electrical Department Iranian Offshore Oil Company Tehran, Iran
seyyed mohammad Shariatmadar
Electrical Department Naragh Branch Azad University Naragh, Iran
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