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yzou_ua
Joined: 05 Nov 2008
Posts: 28
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 06 Nov 2009 22:00 Question on ACDC rectifier using thyristor |
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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??
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FvM
Joined: 22 Jan 2008
Posts: 5151
Helped: 766
Location: Bochum, Germany
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06 Nov 2009 22:20 Question on ACDC rectifier using thyristor |
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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
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yzou_ua
Joined: 05 Nov 2008
Posts: 28
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06 Nov 2009 22:45 Re: Question on ACDC rectifier using thyristor |
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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 wrote: |
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 |
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