Interested to Buy Any Domain ? << Click Here >> for more details...
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/
- 5 Answers
- 11202 Views
- EEE, TCS, I also Faced
- E-Mail Answers
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 |
Post New Answer View All Answers
what is model question rrb junior engineer electrical gr.II
Why collecting electrode of ESP to be earthed
armature winding of dc machine produce alternating emf then it convert in to dc by using commutator.But only we consider armature resistance why don't we consider inductive reactane effect?
How relay coordination has to be done? what are the inputs are required for this? Please explain this with calculation method?
whatare the disadvantages occur,if the form factor of transmission will not be equal to 1.11
What is the temperature PROFILE OF A FLUID W. R. T. Distance from a sphere to which it is IN CONTACT which is at constant temp.?
IF TVM OF TRANSFORMER SHOWS POWER FACTOR ON 33 KV SIDE AS 0.97 LAGGING AND ON 132 KV SIDE IS 0.75 LEADING.IS THIS CORRECT.WHERE IS PROBLEM.
How to calculate the fuse rating depend upon the DC circuit?
if there are six generators (3 gas CATT, one Jenbacher o1 MW each, and two nos Diesel 01 no 01 mw other 0.65mw EDGs ( say), 3 CAtt gas set have identical pole pitch,01mw EDG and Jenbacher gas Set have different pole pitch, how their power connection can be done to connect a common bus bar during installation. in short, how different pole pitched generators power connection can be done to connect a common busbar system through generators incomer ACBs.
What are the conditions to be satisfied for parallel operation of dc generators?
what is meaning of sympathetic tripping with respect to relays and give the values for current carrying capacities for copper and aluminium cables from 16sq mm to 500sq mm
1. What is the exact formula for one weber? for example,(one ampere = one coulomb electron of electrons crossing a point of conductor at one second. i.e, 1A=1Q/1sec)
what is inter connected dc generator?
How to calculate or formula to calculate rhe power in 2 phase system ??
how to i get B licence,i am completed BE electircal and electronics engineering.i want to konw the proceduure to get b licence
