Turning on a Thyristor

Discussion in 'General Electronics Chat' started by ActivePower, May 28, 2012.

  1. ActivePower

    Thread Starter Active Member

    Mar 15, 2012
    155
    23
    Well, I've recently started reading about thyristors and I have been stuck by something my instructor said about the turn-on process.

    During the forward-biased state of the thyristor the junctions J2 is reverse-biased, which is essentially responsible for the forward "blocking" mode. However, after the break-over voltage, J2 starts conducting magically.

    How does this change come about? Is this due to the breakdown or avalanche process?
    If so, how can a device recover from it and turn-off?
    I mean, we say diodes are destroyed if the reverse voltage exceeds the breakdown voltage but how come the same process not destroy the thyristor junction?
     
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