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
(a) Figure shows a circuit containing an amplifier block. Find the open-circuit voltage amplification of the circuit. (b) Let the output terminals be connected to a load resista

a) Define the blending function reparanetrization. b) Four position vectors P1[0 , 0], P2[1 ,1], P3[2 ,-1] ,P4[3, 0] are provided with tangent vectors P1'[1,1] and P4'[1,1]. Cal

RIM Read Interrupt Mask Instruction This  instruction is used  to read the  status  of interrupts  and  read the serial  input  data. The status  byte is loaded  into  the accu

What are Difference Equations? A continuous-time system can be described by differential equations. Likewise, a discrete-time system can be explained by difference equations. T

Q A point charge Q 1 =-5 nC is located at (6, 0, 0). Compute the voltage v ba between two points a(1, 0, 0) and b(5, 0, 0). Comment on whether point a is at a higher potential wi

Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri

KPI for Second Stage Implementation These KPIs deal along with the quality of the relationship among a supplier and a user (customer). They are significant to potential custom

Constant Frequency System In this  system chopping period  T is kept constant but the  on time T om is varied. This  system is also referred to pulse with modulation or time

Q. Show Applications for Synchronous Motors? With constant-speed operation, power factor control, and high operating efficiency, three-phase synchronous motors are employed in

Q. A60-Hz, three-phase transmission line has a total per-phase series impedance of 35+j140 .Ifit delivers 40 MW at 220 kV and 0.9 power factor lagging, find: (a) The voltage, c