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

Transistor, can you differentiate the alpha,beta and gamma

can you differentiate the alpha,beta and gamma

Design a circuit using real components, The circuit shown below is a protot...

The circuit shown below is a prototype 4 th - order low-pass filter which is required to meet the specification given. However the specification is not met due to inadequate atten

Illustrate the basic concept of machine cell design, a) Write short notes o...

a) Write short notes on part feeding devices and transfer mechanism. b) Explain with example automation for machining operation with relevant diagrams. c) discuss different p

Explain basic input output system function call, Discuss BIOS function call...

Discuss BIOS function call with one example. BIO stands for Basic Input Output System: This is a set of programs to give most basic low-level services as services keyboard, s

Obtain an expression for b, Q. Consider an in?nitely long, straight wire (i...

Q. Consider an in?nitely long, straight wire (in free space) situated along the z-axis and carrying current of I A in the positive z-direction. Obtain an expression for ¯ B everywh

Transistor, what is bias compensation

what is bias compensation

Composition of mosfet, Composition of MOSFET  In a test pattern the P...

Composition of MOSFET  In a test pattern the Photomicrograph of two metal-gate MOSFETs. Probe pads for two gates and three source or drain nodes are entitled.Generally the se

What is macro, What is macro? A macro is a group of instructions writte...

What is macro? A macro is a group of instructions written within brackets  and recognized  by a name .This is used when a repeated group of instructions is too short or not app

Magnetic ckt''s, what is the difference between statically and dynamically ...

what is the difference between statically and dynamically induced emf''s

Describe what you understand by offset voltage, a. Describe what you unders...

a. Describe what you understand by 'offset voltage' and 'offset current' of op-amp.  Discuss with a neat circuit diagram the method used for minimizing offset voltage and offset cu

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