i am swathi, b.tech 4th year.
In smps(switched mode power supply)we are using
diodes,mosfets,igbts for controling of current.
And my question is why we did not use thyristors(scr)? it
is also act as a switch,then what is the drawback of scr as
compared to above transisters> if we use the scr,then what
is happening ? plz give reply as soon as possible bcoz i
am doing project on smps. plz frnds i want ans for
that. if anybody know the ans plz send to my e-mail
id /swathi.tadakapally@gmail.com/
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Answer Posted / nithi
SCR cannot be used due to the following reason.
1.we have to design commutation circuit for SCR.(this will
increase the complexity of the circuit)
2.cost of SCR is higher than MOSFET,TRANSISTOR & IGBT.
3.SCR is current controlled device .This will increase the
load on the triggering circuit.
4.The voltage drop & power loss in SCR is somewhat higher
than mosfet,igbt & transistor.
5.moreover,the switching frequency of the SCR is very low
(around 1khz).
so,I think it is better to use MOSFET,IGBT & TRANSISTOR as
a switching device in SMPS.OK............
| Is This Answer Correct ? | 19 Yes | 3 No |
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