Static v- i characteristics, Electrical Engineering

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.

 

Posted Date: 4/2/2013 12:53:24 AM | Location : United States







Related Discussions:- Static v- i characteristics, Assignment Help, Ask Question on Static v- i characteristics, Get Answer, Expert's Help, Static v- i characteristics Discussions

Write discussion on Static v- i characteristics
Your posts are moderated
Related Questions
Automatic Meter Reading and Remote Meter Reading Automatic Meter Reading (AMR) and Remote Meter Reading (RMR) elaborate several systems which permit meters to be checked with

Transmission Through a LiNb0 3 Plate Examine the transmission of an unpolarized He-Ne laser beam (?o= 633 nm) normally incident on a LiNb0 3 plate (ne = 2.29, no = 2.20) of thickn

Active-mode PNP transistors in circuits: In the figure, the arrows showing current point in the direction of conventional current - the flow of electrons is in the opposite di

what component will be use for making or logic gates.

Starting Methods for Polyphase Induction Motors When high starting torques are required, a wound-rotor induction motor, with external resistances inserted in its rotor circuits

Future scope on MATLAB in India

how thyristor work in speed control??

Define HRQ? The hold demand output requests the access of the system bus. In non- cascaded 8257 systems, this is linked with HOLD pin of CPU. In cascade mode, this pin of a sla

how does this circuit work and what are th electrical components in it do?

Q. Explain about Differentiator? Shown in Figure is a differentiator which is obtained by replacing R1 in the inverting amplifier of Figure by a capacitor C. Assuming ideal op-