Pulse width modulation (PWM) technique is
developed for a three to seven-phase matrix converter
configuration for both linear and overmodulation region. The
developed modulation technique is based the carrier-based
technique. The concept of carrier based scheme of a three to
three phase matrix converter is extended in this paper for
controlling a three-phase to seven-phase matrix converter. Two
techniques are proposed, one outputs 0.75 of the input
magnitude and the output reaches 0.7694 of the input with the
other method. This is the maximum value of the output voltage
in the linear range that can be achieved in this configuration of
the matrix converter. Input side over-modulation strategy of
three to seven phase matrix converter is also analyzed resulting
in the increase of 4.9% of the output voltage at the expense of
introduction of low order harmonics in the input currents and
output voltages. The viability of the proposed control
techniques is proved using analytical, simulation and
experimental approach.