IGBT and MOSFET help

if any one could tell me how these work to switch power electronickly it would be apreacited

google "IGBT"

here is one link:
http://www.elec.gla.ac.uk/groups/dev_mod/papers/igbt/igbt.html

i dont understand what the thresh hold voltage is and how you figure out what it is

You don't figure out the threshold voltage, you find the data sheet and it tells you. The MOSFET or IGBT conducts current from drain to source, depending on the gate voltage. They are off with zero gate voltage relative to the source and start drawing current at the threshold voltage. At higher gate voltage, the MOSFET or IGBT draws more current.

So the data sheet of the component tells you the thresh old voltage and the higher the gate voltage compared to the thresh hold voltage the more power the igbt conducts

dstich said:

So the data sheet of the component tells you the thresh old voltage and the higher the gate voltage compared to the thresh hold voltage the more power the igbt conducts

Click to expand...

mmm

Just a quick MOS/IGBT write.

An IGBT is a PNP power transistor with and N-type MOSFET on the front-end. Basically an attempt to merge the charateristics of a MOSFET (fast switching) with a BJT (low on-state voltage and high conduction current)

With that done another note. IGBT were designed to act as electronic switches NOT electronic linear amplifiers. It really isnt a good idea to run them in the active region as a linear amplifiers there is alot better devices out there for that job. Im not saying you cant.

IGBT's are designed to be switched with +/-15V gate supply to ensure that they are held-on and also held-off.