| Abstract |
The presented paper deals with the matrix
converter induction motor drive with emphasis on the PWM
modulation strategies design. Matrix converters provide an
all-silicon solution to the problem of converting AC power
from one frequency to another, offering almost all the
features required of an ideal static frequency changer. They
possess many advantages compared to the conventional
voltage or current source inverters. A matrix converter does
not require energy storage components as a bulky capacitor
or an inductance in the DC-link, and enables the bidirectional
power flow between the power supply and load.
The most of the contemporary modulation strategies are
able to provide practically sinusoidal waveforms of the
input and output currents with negligible low order
harmonics, and to control the input displacement factor.
Sophisticated pulse width modulation strategies in terms of
various optimization criteria are known in case of indirect
frequency converters, whereas both the inverter and the
rectifier can be operated with pulse width modulation. The
instantaneous state of both the output and the input
converter waveforms depend at any time on the switch state
of the converter power switches. Suitable switch states
sequence of the nine matrix converter switches can be
indirectly derived from the given switch states sequence of
the twelve switchers of the indirect frequency converter. |
