Integrated gate commutated thyristor
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
computer science crazy
Super Moderator
******

Posts: 3,048
Joined: Dec 2008
#1
20-10-2009, 03:10 PM


The Integrated Gate Commutated Thyristor (IGCT) is a new high-power semiconductor device. IGCT is a special type of thyristor similar to a GTO. They can be turned on and off by a gate signal, have lower conduction loss as compared to GTOs, and withstand higher rates of voltage rise (dv/dt), such that no snubber is required for most applications.The structure of an IGCT is very similar to a GTO thyristor. In an IGCT, the gate turn off current is greater than the anode current. This results in a complete elimination of minority carrier injection from the lower PN junction and faster turn off times. The main difference is a reduction in cell size, plus a much more substantial gate connection with much lower inductance in the gate drive circuit and drive circuit connection. The very high gate currents plus fast dI/dt rise of the gate current means that regular wires can not be used to connect the gate drive to the IGCT. The drive circuit PCB is integrated into the package of the device. The drive circuit surrounds the device and a large circular conductor attaching to the edge of the IGCT die is used. The large contact area and short distance reduces both the inductance and resistance of the connection.The IGCT's much faster turn-off times compared to GTO's allows them to operate at higher frequencies”up to several of kHz for very short periods of time. However, because of high switching losses, typical operating frequency up to 500 Hz.IGCT are available with or without reverse blocking capability. Reverse blocking capability adds to the forward voltage drop because of the need to have a long, low doped P1 region.

IGCT capable of blocking reverse voltage are known as symmetrical IGCT, abbreviated S-IGCT. Usually, the reverse blocking voltage rating and forward blocking voltage rating are the same. The typical application for symmetrical IGCT is in current source inverters.

IGCT incapable of blocking reverse voltage are known as asymmetrical IGCT, abbreviated A-IGCT. They typically have a reverse breakdown rating in the 10's of volts. A-IGCT are used where either a reverse conducting diode is applied in parallel (for example, in voltage source inverters) or where reverse voltage would never occur (for example, in switching power supplies or DC traction choppers).

Asymmetrical IGCT can be fabricated with a reverse conducting diode in the same package. These are known as RC-ICT, for reverse conducting IGCT.

The main applications are in variable frequency inverters, drives and traction.
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Reply
computer science crazy
Super Moderator
******

Posts: 3,048
Joined: Dec 2008
#2
20-10-2009, 03:11 PM

see library.abbGLOBAL/SCOT/scot256.nsf/VerityDisplay/550E50BE84DC65A0C1256B9D00483EB2/$File/Nu97sk.pdf
library.abbglobal/scot/scot256.nsf/veritydisplay/5ebd8221b1282eaec12575a20024f7d3/$File/IGCT-Flyer_0409_Web.pdf
ieeexplore.ieeexpls/abs_all.jsp?arnumber=729042
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
Reply

Important Note..!

If you are not satisfied with above reply ,..Please

ASK HERE

So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page

Quick Reply
Message
Type your reply to this message here.


Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  integrated starter generator jaseelati 0 203 25-02-2015, 01:38 PM
Last Post: jaseelati
  coin based toll gate system jaseelati 0 236 23-01-2015, 03:49 PM
Last Post: jaseelati
  load commutated inverter wiki jaseelati 0 256 10-01-2015, 03:09 PM
Last Post: jaseelati
  GATE Syllabus for Electronics and Communication Engineering (ECE) study tips 0 463 28-08-2013, 04:05 PM
Last Post: study tips
  WIRELESS INTEGRATED NETWORK SENSORS ppt study tips 0 481 27-08-2013, 03:06 PM
Last Post: study tips
  An Integrated Sensor Microsystem for Industrial and Biomedical Applications pdf study tips 0 335 08-06-2013, 03:17 PM
Last Post: study tips
  Field-programmable gate arrays (FPGAs) pdf study tips 0 431 05-06-2013, 04:31 PM
Last Post: study tips
  Seminar Report on Integrated Power Electronics Module mechanical wiki 3 4,776 29-03-2013, 06:46 PM
Last Post: Guest
  DESIGN OF MULTI-SENSOR INTEGRATED NAVIGATION SYSTEM FOR LAND VEHICLE seminar ideas 1 658 05-03-2013, 11:59 PM
Last Post: Guest
  Gate Turn On Turn Off Thyristors PPT study tips 0 560 02-03-2013, 11:47 AM
Last Post: study tips