انجام پروژه متلب | متلبی

کد مقاله g135
عنوان مقاله:

A Single-Input Single-Output Approach by using Minor-Loop Voltage Feedback Compensation with Modified SPWM Technique for Three-Phase AC–DC Buck Converter

سال ارائه:  2013       نوع مقاله: ژورنال                            گزارش فارسی: دارد
کلید واژه :MATLAB-Simulink, Minor-loop feedback compensator, Modified SPWM, Three-phase AC–DC buck converter, پروژه متلب , شبیه سازی با متلب ,

Abstract
The modified sinusoidal pulse-width modulation (SPWM) is one of the PWM techniques used in three-phase AC–DC buck
converters. The modified SPWM works without the current sensor (the converter is current sensorless), improves production of
sinusoidal AC current, enables obtainment of near-unity power factor, and controls output voltage through modulation gain
(ranging from 0 to 1). The main problem of the modified SPWM is the huge starting current and voltage (during transient) that
results from a large step change from the reference voltage. When the load changes, the output voltage significantly drops
(through switching losses and non-ideal converter elements). The single-input single-output (SISO) approach with minor-loop
voltage feedback controller presented here overcomes this problem. This approach is created on a theoretical linear model and
verified by discrete-model simulation on MATLAB/Simulink. The capability and effectiveness of the SISO approach in
compensating start-up current/voltage and in achieving zero steady-state error were tested for transient cases with step-changed
load and step-changed reference voltage for linear and non-linear loads. Tests were done to analyze the transient performance
against various controller gains. An experiment prototype was also developed for verification.
Key words: MATLAB-Simulink, Minor-loop feedback compensator, Modified SPWM, Three-phase AC–DC buck converter

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