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

Identify the processes involved in fabrication, The first three elements of...

The first three elements of the task are: 1. To critically examine a selection of the components used on this design 2. To recommend materials to be used in making the board

Ive some applications of hall effect, Give some applications of Hall Effect...

Give some applications of Hall Effect. Applications of Hall Effect: 1. This is used for finding whether a semi-conductor is N-type or P-type. 2. This is used in finding

Full wave bridge rectifier circuit , Construct a full wave bridge rectifier...

Construct a full wave bridge rectifier circuit and connect it to the transformer output. What is the Output Voltage and Frequency?

What is the importance of rs232-c in serial communication, What is the impo...

What is the importance of RS232-C in serial communication? RS-232 that is Recommend Standard number 232 and C is the new revision of the standard. The serial ports on main comp

Flush plate in residential circuitry, When sizing wire, one of the most dif...

When sizing wire, one of the most difficult tasks is to calculate the electrical load that will be present on the conductors. How do you decide what size wire to use? What two fact

Explain instruction sets of 8085, Explain instruction sets of 8085. a) ...

Explain instruction sets of 8085. a)  Data transfer group - MOV, MVI, LXI. b)  Arithmetic group - ADD, SUB, INR. c)  Branch group - JMP, JNZ, CALL. d)  Logical group -

Permeability and b-h curve for different magnetic materials, Permeability a...

Permeability and B-H curve for different magnetic materials Permeability is the ability of a magnetic circuit to create magnetic flux lines in a material or substance that prod

Regenerative braking control - motor control , Regenerative Braking Control...

Regenerative Braking Control In this  methods  motor  behaves like a  generator  and the kinetic energy of the  motor  and connected load is  returned to the supply. If means

Explain classification of amplifiers on biasing conditions, Q. Explain the ...

Q. Explain the classification of amplifiers on the biasing conditions? Based on the amount of transistor bias and amplitude of the input signal, amplifiers can be classified as

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