The converter is supplied from a three$-$phase Y$-$connected secondary side

of the transformer with $208$V at $50$Hz $.$ The load consists of a resistance

of Ro $=10$ and large inductance Lo $=150$mH$.$ If it is required to obtain

an average output voltage of $50\%$ of the maximum possible output voltage,

calculate

$($a$)$ the maximum possible output voltage and average output voltage;

$($b$)$ the delay angle $\backslash$alpha ;

$($c$)$ the rms and average output currents;

$($d$)$ the average and rms thyristor currents;

$($e$)$ the rectification efficiency;

$($f$)$ the transformer utilization factor $($TUF$)$;

$($g$)$ displacement factor;

$($h$)$ distortion factor;

$($i$)$ the input power factor; and

$($j$)$ reactive power input