Static v- i characteristics, Electrical Engineering

Assignment Help:

Static V- I Characteristics

The  static V- I  characteristics of power diodes is shown  in figure 1.2  when the  anode is made  positive with  respect to cathode the power  diode  is said  to be forward  biased. In  this condition the power diode behaves as a closed switch. As the anode  voltage  is increased the current will initially be zero  until  the voltage  is less than its threshold  voltage  is the minimum  anode voltage  beyond which the diode current  increases rapidly and diode  starts conducting. A conducting diode has a relatively small  forward voltage drop across. It  the magnitude of the forward voltage  drop depends son the manufacturing  process and temperature.

1909_Static V- I Characteristics.PNG

                                                               Figure Static V- I Characteristics of power diode

When  cathode  of power  diode is made  positive  with respect to anode  the diode  is said  is to be reversed. It  reversed. It  behaves as an  open  circuit. Under reverse biased  condition a small reverse current  flows and this  reverse current  is known as leakage current leakage current increase slowly  in magnitude with the  reverse voltage until the avalanche voltage  is reached. The  avalanche breakdown is a process that occurs  in a diode when high voltage  causes free electrons to travel at high  speeds  colliding with other electrons and  knocking  them out of their  orbits. The  result is  a rapidly increasing amount  of  free electrons  and hence increased current. The  can be  limited by connecting a  resistance in  series  with the  power diode.

 


Related Discussions:- Static v- i characteristics

Satellite Communication, ubmission Deadline: Wednesday, July 7, 2021 Assign...

ubmission Deadline: Wednesday, July 7, 2021 Assignment 2 EE5543 - Satellite Communication Question 1: MEASAT-1 is located at 91.5 o E and operating at the base frequency of 10.982

Calculate the current flowing through the inductor, The circuit is altered ...

The circuit is altered by replacing the capacitor, C1 with an inductor of 150mH and left with the switch in position (a) for a long time. At time t=0, the switch is moved from posi

Equivalent circuits, Modern complex systems are normally constructed by int...

Modern complex systems are normally constructed by interconnecting sub-units. Therefore the systems engineer is often not too concerned about the details of what is inside these

Applications of thermodynamics, what are the applications of thermodynamics...

what are the applications of thermodynamics in Electrical Engineering?

Explain thevenin and norton equivalent circuits, Q. Explain Thevenin and no...

Q. Explain Thevenin and norton equivalent circuits? For a linear portion of a circuit consisting of ideal sources and linear resistors, the volt-ampere (v-i) relationship at an

Introduction to power systems, Q. Introduction to power systems? Thomas...

Q. Introduction to power systems? Thomas A. Edison's work in 1878 on the electric light led to the concept of a centrally located power station with distributed electric power

Project, Design a DC motor control system to run the 48V DC motor at 40rpm ...

Design a DC motor control system to run the 48V DC motor at 40rpm up to max load of the motor. You are responsible for designing the control of a 24V supply along with the speed s

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