In dual converter, the circulating current A) Allows smooth reversal of load current B) Improves speed of response Which of the options is true?

In dual converter, the circulating current A) Allows smooth reversal of load current B) Improves speed of response Which of the options is true? Correct Answer Both A and B are true

• In a dual converter without circulating current operating mode, the flow of circulating current is completely inhibited through automatic control of the firing pulses.
• Only that converter which carries the load current is in conduction and the other converter is temporarily blocked.

[ alt="F1 U.B Madhu 06.04.20 D5" src="//storage.googleapis.com/tb-img/production/20/04/F1_U.B_Madhu_06.04.20_D5.png" style="width: 362px; height: 101px;">

• There is an instantaneous voltage difference at the DC terminals of the two converters
• It produces enormous circulating current between the converters and that will flow through the load.
• Therefore, in the practical dual converter, it is necessary to control the circulating current.
• The advantage of this scheme is that we can get smooth operation of the converter at the time of inversion.
• Time response of the scheme is very fast.
• The normal delay period is 10 to 20 ms in the case of circulating current free operation is eliminated.