A single phase cyclo - converter with mid point configuration is use for obtaining an output frequency of one third times the inputfrequency. Turn ratio from primary to upper secondary is 1/1 and tolower secondary is 1/2 . The SCRs are so triggered as toobtain a symmetrical output voltage waveform . Sketch theoutput voltage and output current waveform for a resistive load forfiring angle α = 0 degree and α =30degree .Indicate the conduction of various thyristers.