Delay time - power semiconductor devices , Electrical Engineering

Delay time ( td)

Initially a thyristor  remains  in forward  blocking  stat when  anode to cathode forward  voltage  is applied  and gate  to cathode circuit is opened. As the gate to cathode voltage  is applied  a small forward  leakage  current flows. Delay time is the time during  which anode  current  rises  form forward  leakage current  to 10% of Ia  when gate  current is  reached 90% of Ig where Ia  and Ig  are the final  value  of anode  and gate  current  respectively. As the anode  voltage falls  from  Va to 90%  of Va where Va is the initial  value of anode  voltage.

Since  the gate  current  has non  uniform  distribution of current  density over the cathode  surface Ig is much  higher  near the gate and its value  decreases rapidly as the  distance from the  increases.

Posted Date: 4/2/2013 3:41:23 AM | Location : United States







Related Discussions:- Delay time - power semiconductor devices , Assignment Help, Ask Question on Delay time - power semiconductor devices , Get Answer, Expert's Help, Delay time - power semiconductor devices Discussions

Write discussion on Delay time - power semiconductor devices
Your posts are moderated
Related Questions
Interpreter- High level language The interpreter is a program  which  translates the high  level  program  into  objects  program  statement wise . it reads one statement of

Thermocouples are used for the measurement of (A)  Humidity.                                   (B) Pressure. (C) Temperature.                               (D) Density.

Q. With the help of circuit diagram explain a Miller Sweep generator Figure given below shows the circuit of a Miller integrator or a sweep circuit. Transistor Q1 acts as a swi

Determine the Service and Backwash Rates The system on site is a pressure sand filter, with a service curve. The filter is backwashed using the feed pump, at a higher flow rate, s

Q. What is the voltage gain of common gate amplifier? The controlled source gmVgs is connected from drain to source with rd in parallel.The resistor is connected Rs is connecte

Draw the circuit of transistor in the common base configuration. Draw the Active, saturation and cut-off region. List the characteristics of Ideal Op-Amp. Sketch the pin diagram

Define some Applications of Digital Counters? Digital counters are extremely useful in many applications. They can be effortlessly found in digital clocks and parallel-to-seri

applications of electronics device (bjt,mosfets) in civil engineering

what is decibel

with the aid of the diagram explain the following rules that can be used to determine the direction of magnetic fields around a current carrying conductor (1)cork screw rule (2)rig