Switching characteristics, Electrical Engineering

Assignment Help:

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


Related Discussions:- Switching characteristics

Working of r-2r ladder converter, R-2R LADDER CONVERTER Figure shows a ...

R-2R LADDER CONVERTER Figure shows a 4-bit R-2R ladderD/Aconverter,which contains a reference voltage source, a set of four switches, two resistors per bit, and an op amp. The

Write shorte note on carbon, Write shorte note on Carbon. Carbon: The...

Write shorte note on Carbon. Carbon: The rate of commutator wear in electrical machines is greatly decreased by using brushes made of carbon. Carbon (C) is also used in autom

Repeatability , Reproducibility and repeatability are measures of closeness...

Reproducibility and repeatability are measures of closeness with which a given input may be measured over again. The two terms cause confusion. Therefore, a distinction is made bet

Calculate the e.m.f. generated in armature of a d.c. machine, The armature ...

The armature of a d.c. machine has a resistance of 0.3 and is connected to a 200V supply. Calculate the e.m.f. generated when it is running (a) as a generator giving 80A (b) as a

Discuss about signal distortion in optical waveguides, Discuss about signal...

Discuss about signal distortion in optical waveguides Ans: The major reason for signal distortion within optical waveguide is dispersion. Dispersion of the transmitted

What will the slipring voltage be in this case, A four-pole, three-phase, w...

A four-pole, three-phase, wound-rotor induction machine is to be used as a variable-frequency supply. The frequency of the supply connected to the stator is 60 Hz. (a) Let the r

Introduction to problem based learning, The Problem Based Learning is an ap...

The Problem Based Learning is an approach to learning prepares the students to engage with challenges similar to real world problems.The VEB3001-Problem Based Learning has been an

How can a jfet be used as a voltage controlled resistor, Q. How can a JFET ...

Q. How can a JFET be used as a voltage controlled resistor. Explain from drain characteristics? The region to the left of the pinch off locus is referred to as the ohmic region

Compare memory mapped i/o with i/o mapped i/o, Compare memory mapped I/O wi...

Compare memory mapped I/O with I/O mapped I/O. Memory Mapped I/O Scheme: In this type of scheme there is merely one address space. These address space is explained as all p

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd