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what are the disadvantages of thyristor?

what are the disadvantages of thyristor?

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asked Dec 6, 2017 by anonymous

2 Answers

Answer :

It require exta trigger ckt
In dc it is forced commutated,so xtraa ckt is required
It require R-C shunt for protection during switching

answered Dec 6, 2017 by jihadio k jeeja

commented Dec 22, 2017 by Subbu

Thyristor has high switching losses that's y it is not used in choppers (fixed DC to variable DC)

Answer :

The silicon controlled rectifier (SCR) is unidirectional devices, so it can control power only in DC power during positive half cycle of AC supply. Thus only DC power is controlled with the help of SCR.
In AC circuit, it needs to be turned on each cycle.
It cannot be used at higher frequencies.
The gate current cannot be negative

answered May 22, 2018 by Neha8235

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