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Question on ACDC rectifier using thyristor

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yzou_ua

yzou_ua

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1) Since the thyristor is semicontrolled switch, by using it in a AC/DC bridge, is there any way to design a close-loop control??

2) Since the output DC voltage depends on the firing angle, how to vary the start angle α for thyristors in circuit design??
 

1) Basically yes. A considerably control process dead-time has to be considered
2) Use a suitable phase controller, e.g. a TCA785 or a processor based controller
 

Thank you.
I agree w. u on the dead time prob. of thyristor cl-loop control. Buz the thyristor cannot be forced to be off by PWM control...


FvM said:
1) Basically yes. A considerably control process dead-time has to be considered
2) Use a suitable phase controller, e.g. a TCA785 or a processor based controller
Click to expand...
 

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