Phd Thesis Matrix Converter

Phd Thesis Matrix Converter-50
The converted DC power is then stored in DC link capacitor.In the second stage a PWM-VSI operating at a high switching frequency generates AC signals with arbitrary amplitude and frequency.This paper presents the harmonic compensation of linear loads fed by matrix converter and the performance of two types of controllers(namely, Adaptive Fuzzy control and Adaptive Neural Fuzzy Inference system) are compared, during balanced supply and abnormal grid conditions.

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The matrix converter was firstly introduced in the year 1976 by Venturini and Alesina with their intensive research on MC's and they proposed a generalised highfrequency switching strategy with huge mathematical background in 1980.

They have represented the power circuit of the converter as a matrix.

The main theme of this control strategy is to design an ideal electronic transformer which is capable of varying the current, voltage, power factor and frequency. 1, is the most important from a practical point of view because it connects a threephase source to a three-phase load.

The electrical power from source to load is controlled by power and control circuit of matrix converter.

In order to obtain maximum voltage transformation ratio, gate signals are used to driven the bidirectional switches by using optimum amplitude venturini method.

The matrix converter is a single-stage converter with m × n bidirectional semiconductor power switches that mainly connects each m-phase voltage source to an n-phase load.

Static power frequency converters can be divided in to two main categories.

The first type called indirect AC/DC/AC power frequency converter consists of two or more stages of conversion with an intermediate DC link.

Although this type of AC/AC converter is very cost-effective and reliable, it has lots of drawbacks.

Due to the uncontrolled operation of diode bridge rectifier, the input AC currents drawn by the rectifier contain a large amount of harmonics that produces distortion of the input line voltages, having a negative impact on the performance of sensitive loads and equipment connected to the same supply.


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