SCR & IGBT
SCR & IGBT
(OP)
SCR, once it turns on ,then we are forced to use cmmutating capacitors and dc reactors to turn it off.
I am wondering , why IGBT's are not used instead of SCR's and to get rid of the commutating components ?
Is there any advantage of using SCR's instead of IGBJT's for high current applications?
Thanks in advance.
I am wondering , why IGBT's are not used instead of SCR's and to get rid of the commutating components ?
Is there any advantage of using SCR's instead of IGBJT's for high current applications?
Thanks in advance.





RE: SCR & IGBT
RE: SCR & IGBT
SCRs are mainly used in DC drives and mains commutated rectifiers where commutation components are not necessary. There are also CSI inverters with SCRs in them. The switching is normally at a low 300 or 360 Hz.
There are also gate turn off thyristors (GTO) that can be turned off via the gate. They need rather high energies to be turned off. But still usable.
The main reason SCRs are used in high-power applications (hundreds to thousands of megawatts in HVDC transmission poles) is that they can be built for higher currents and voltages than IGBTs.
Gunnar Englund
www.gke.org
RE: SCR & IGBT
Now if you going to design inverter,say, 120V/20KVA ac output, what would be the best chice for such application:
SCR / CSI / GTO / IGBT
RE: SCR & IGBT
Gunnar Englund
www.gke.org
RE: SCR & IGBT
RE: SCR & IGBT
You want prices... Don't ask us look them up!
Go to DIGIKEY.com and in the front page search stick in "IGBT".
They have 22 pages of them the range up to $300 bucks or so but this all depends on the package, current, voltage, speed, etc. etc.
RE: SCR & IGBT
RE: SCR & IGBT
RE: SCR & IGBT
You are handling this very well while I was looking in other direction.
How's the heating system, BTW?
Gunnar Englund
www.gke.org
RE: SCR & IGBT
It is soooooOOOoooOOOOooo nice...
I do still need some insulation work, the place chills quickly. And I have never seen a gas bill yet... So you will probably hear my whining soon.
Thanks for asking.