Delay time - power semiconductor devices , Electrical Engineering

Assignment Help:

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.


Related Discussions:- Delay time - power semiconductor devices

Voltage divider with ac bypasses capacitor, Voltage divider with AC bypasse...

Voltage divider with AC bypasses capacitor: Figure: Voltage divider with capacitor The standard voltage divider circuit that is discussed above faces a drawback - A

Key performance indicators in business, Key Performance Indicators in Busin...

Key Performance Indicators in Business Significance of Key Performance Indicators (KPIs) in the business of power especially within a change environment due to partial deregul

Motor., if load is removed so which motor will run fast? series or shunt?

if load is removed so which motor will run fast? series or shunt?

Finance and accounting in kpi, Finance and Accounting in KPI Every bus...

Finance and Accounting in KPI Every business is completed to earn some profit and it is the underline concept. The main tasks are to manage the finances efficiently to meet th

Write a brief note on common drain amplifier, Q. Write a brief note on comm...

Q. Write a brief note on common drain amplifier Since voltage at the gate-drain is more easily determined than that of the voltage at gate-source, the voltage source in the inp

Material science, advantage and disadvantage of alloying steel with silicon...

advantage and disadvantage of alloying steel with silicon

Describe about digital communication systems, Q. Describe about digital com...

Q. Describe about digital communication systems fl A digital signal can be deflned as having any one of a finite number of discrete amplitudes at any given time. The signal coul

#title. electronic project for invention, I need assistance in building a c...

I need assistance in building a circuit for my invention ,I am a electronic tech with limited knowledge but designing and building a proto model is a little out of my expertise ce

#title.Shockley diode, I want proof of shockley diode equation with all ste...

I want proof of shockley diode equation with all steps

What do you mean by external data bus, What do you mean by external data bu...

What do you mean by external data bus? External Data Bus: A bus which connects a computer to the peripheral devices. The microprocessor-8088 has 16-bit registers, 20-bit add

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