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Abstract— This paper deals with the design and analysis of
Matrix converter for variable frequency using mathematical
equations. The analysis was done using Venturini modulation
algorithm. The PI controller is used for Matrix converter to
reduce Total Harmonic Distortion (THD) in the output current.
The comparative study is done for open loop and closed loop PI
compensation in MATLAB-Simulink. Furthermore, the output
waveforms are produced with significant reduction in the Total
Harmonic Distortion.
Introduction
Matrix converter is the new development ac to ac
converters. It is operated with the bidirectional switch with
on/off control. It is a Forced Commutated Cycloconverter
(FCC). In Matrix converter the output frequency and
amplitude has no limits. There are only nine bidirectional
switches used in Matrix converter. The use of storage
elements is not required, hence the size and weight of the
converter is reduced. Only 9 bidirectional switches are used
for the three phase conversion. It provides sinusoidal
waveforms for input and output currents. The input power
factor is always unity. In Venturini algorithm of Matrix
converter the output voltage is restricted to half of its input
voltage.
I. TOPOLOGY
The Matrix converter is a development of the Forced
Commutated Cycloconverter (FCC), incorporating PWM
voltage control. The switches are controlled in such a way that
the average output voltage is a sinusoidal of desired frequency
with desired amplitude. It consists of 3×3 bidirectional
switches[4]. It connects a three phase voltage source with a
three phase load, typically motor. Potential practical
implementations of the converter have therefore focused on
applications where there is control over the design of the
motor and where the space and weight are at a premium, such
as in integrated motor drives and aerospace and naval
applications.