Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
V-I Characteristics
In the normal mode of operation of an IGBT a positive voltage is applied to the collector relative to emitter. When the gate is at zero potential with respect to E no collector current IC flows for collector voltage VCE below the breakdown level VB. When VC < VB and the gate voltage exceeds the threshold value VGT, electrons pass into the N- region ( base of the P-N-p transistor).
Figure V- I characteristics of IGBT
These electrons lower the potential of the N region biasing the P+ - N_ junction thereby causing holes to be injected from the P+ substrate into the N_ epi-layer region. The excess electrons and holes modulate the conductivity N+ region which dramatically reduces the on resistance of the device. With zero gate bins the forward characteristic of IGBT shows very low current (<1bA) where it breaks up sharply to much larger current levels with only a slight increase in voltage. The VI characteristics of IGBT is shown in figure it show the relation between collector current tc and collector to emitter voltage VCE for different values of gate to emitter voltage VGE.
The junction J1 blocks reverse voltage. An IGBT without N+ buffer layer has higher reverse blocking capability. Therefore an IGBT required for blocking high reverse voltage does not have N+ buffer layer. The reverse blocking voltage is shown as the VRM on the VI characteristics. The junction J2 blocks the forward voltage when the IGBT is off.
Q. Show NPN Common Base Amplifier? This configuration is used for high frequency applications because the base separates the input and output, minimizing oscillations at h
The Electrical Circuit sign convention Notice that current leaves a source at its high potential (positive) terminal but enters a load at its high potential (positive) ter
what is neutral point
A balanced three phase, four wire, WYE connect load consisting of per phase resistenance of A ohms and inductive reactance of D ohms/phase is connected to a B000 V three phase sour
Q. What is the basic difference between the weighted resistor and the R-2 R ladder D/A converters?
Gis Applications So far, you have learnt how GIS can help utilities to obtain snapshots of the locations of substations, lines and cables in relation to their geographical bea
What are the causes of sparking in the commutator? Explain the methods to reduce the sparking in the commutator?
Q. Counting to moduli other than 2 n is a frequent requirement, the most common being to count through the binary-coded decimal (BCD) 8421 sequence. All that is required is a four
cpopy 16 bit data Register pair Example : Copy 16 bit data 3 E 21H in register pair BC Solution :The statement is LXI B 3E 21H 16 bit data 3E 21H in reg
how to implement monostable delay in matlab simulink environment? [email protected]
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd