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
Q. Write notes on clamping ? When a signal drives an open-ended capacitor the average voltage level on the output terminal of the capacitor is determined by the initial charge

Q. Show Balanced three-phase loads? Three-phase loads can be connected in either wye (also known as star or Y) or delta (otherwise known as mesh or ). If the load impedances i

Q. Present and Future Trends in power systems? According to the Edison Electric Institute, electricity's share of U.S. primary energy was almost 36% in 1989, and it is likely t

To demonstrate a practical method of testing semiconductor diodes.

What is the process of metal removal in electrochemical machining? What are the basic functions of electrolyte in ECM? Illustrate the following key terms in electrochemical mach

The variable resistor Z o in the circuit shown in Fig. 1  is adjusted until maximum average power is delivered to Zo. a)  Find the value of Z o b)  Calculate the maximum av

Redraw the Wheat stone bridge circuit of Figure and show that Equation holds good for the null condition when the meter A reads zero current.

It is required that the current floor position be displayed as a number 1, 2, or 3 on a seven segment LED display on floor 1, which is quite close to the LCU. Data Storage It


how to be prepare for gate....