Switching characteristics, Electrical Engineering

Switching Characteristics

The switching  characteristic  of an IGBT  during  turn on and turn off time all  shown  in the sum of delay time  and rise time gives  the total  turn on time  here delay time is the time during which collector to  emitter voltage falls 10% it means from VCE to 90% of VCE  where VCE=  initial collector emitter voltage. The rise time  is the time during  which collector  current  from it initial leakage current  ( ICE)  to 10%  of IC where IC =final  of collector current therefore,

 Ton = T J  + tr

The  on state  forward voltage drop across the  device is also  shown in figure  as VCES.  The turn off  time of IGBT  can be  divide into there intervals delay time Ido initial  and final fall  time therefore  total turn  off times 

Toff = t do + T if + tff

The delay  time during  turn off defined as a time during  which  the gate voltage  falls  from VGE to threshold voltage  VGE. Due  to this collector current  falls from IC  to 90% of IC. At the  end of this  delay  time VCE being  to rise.  During  initial  fall time  tif collector current falls forms 90%  to 20%  of initial  value of IC and VCE rises  from on state  forward drop to 10%  of VCE,. During  final fall  time trf  collector current falls from 20% to 10%  of initial  of IC and VCE rises from  1% of VCE final  value of VCE

Posted Date: 4/2/2013 6:24:45 AM | Location : United States

Related Discussions:- Switching characteristics, Assignment Help, Ask Question on Switching characteristics, Get Answer, Expert's Help, Switching characteristics Discussions

Write discussion on Switching characteristics
Your posts are moderated
Related Questions
Q. Explain stages of attending to Rail fracture? Various stages of attending to Rail fracture / weld failure in a L.W.R. track in field - Equipment required - i) Special

how does a zener diode works.

Mode 1 ( 0 By  applying a positive  output  pulse  of the pulse  width modulator to  the  transistor Q 1 it gets turned on.  An input  current  in flows  through V in   Q 1

What are Shift Register Counters? Two of the main common types of shift register counters are the Ring counter and the Johnson counter and They are basically shift registers wi

Explain In brief about the Robots - Robot is programmed with a series of instructions that enable it to carry out a series of tasks - On the other hand, an operator manually

Future scope on MATLAB in India

Q. Determine the Laplace transform for each of the following functions from the basic de?nition of Equation. (a) f 1 (t) = u(t) (b) f 2 (t) = e-at (c) f 3 (t) = df (t) dt,

Strategy and Customer Relationship Management CRM sometimes considers as only information technology because of availability of quite a good number of software packages in the

Q.   Define and explain the critical field circuit resistance and critical speed of a DC shunt generator.   Ans. The OCC and R - line for a DC shunt generator. As, R f is

Electric current   Electric current is a flow of electrons. Each electron carries a very small amount of negative charge (1.6 x 10 -19 coulombs)   A current