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For a cycloconverter, when the displacement angle of the load is 0 degrees, each converter carries the load current when it operates in:  

For a cycloconverter, when the displacement angle of the load is 0 degrees, each converter carries the load current when it operates in:   Correct Answer its rectifying region only

Explanation:

The basic  cyclo-converter is shown below:

[ alt="F1 Shubham.B 10-05-21 Savita D12" src="//storage.googleapis.com/tb-img/production/21/05/F1_Shubham.B_10-05-21_Savita_D12.png" style="width: 440px; height: 178px;">

Principle of operation

  • Each two-quadrant converter (phase-controlled) is represented as an alternating voltage source, which corresponds to the fundamental voltage component obtained at its output terminals.
  • The diodes connected in series with each voltage source, show the unidirectional conduction of each converter, whose output voltage can be either positive or negative, being a two-quadrant one, but the direction of current is in the direction as shown in the circuit, as only thyristors − unidirectional switching devices, are used in the two converters.
  • Normally, the ripple content in the output voltage is neglected.

The control principle used in an ideal cyclo-converter is to continuously modulate the firing angles of the individual converters. So, that each produces the same sinusoidal (ac) voltage at its output terminals.

The output voltage and current waveforms of the cyclo-converter are shown in the fig

[ alt="F1 Shubham.B 10-05-21 Savita D13" src="//storage.googleapis.com/tb-img/production/21/05/F1_Shubham.B_10-05-21_Savita_D13.png" style="width: 286px; height: 396px;">

[ alt="F1 Shubham.B 10-05-21 Savita D14" src="//storage.googleapis.com/tb-img/production/21/05/F1_Shubham.B_10-05-21_Savita_D14.png" style="width: 322px; height: 309px;">

The displacement angle of the load (current) is zero in fig.

In this case, each converter carries the load current only, when it operates in its rectifying region, and it remains idle throughout the whole period in which its terminal voltage is in the inverting region of operation.

Conclusion:

Option 1 is correct.

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