The matrix converter connects any output line to any input line by means of
nine-bidirectional switches constructed in a matrix form, as shown in Figure 2.1.
Note that throughout the thesis,u ppercases ubscripts( A BQ denote the input phases
and lowercase subscripts (a b c) denote the output phases. Only one of the switches
on each output phase can be closed at any particular time. The output voltage
waveforms are therefore reconstructed from chops of the three input voltages