4 avg. rating (80% score) - 1 votes
Are you looking for a job for future perspective and that interest you the most? Look around, and see wisdom jobs online portal for better prospects?Thyristor is a solid state semiconductor device with four layers of alternating P and N type materials. It is a unidirectional device that will only conduct current in one direction only, but unlike diode a thyristor can be made to operate as either an open circuit switch or as a rectifying diode depending upon how thyristor gate is triggered. This job requires good communication skills and good exposure on products like indicators or transmitters etc. So, candidates have a glance over the thyristor job interview questions and answers below and rock the show.
Various protection of SCR is
It is defined as the power electronics converter which converts the fixed AC voltage into a variable AC voltage without change in the frequency.
A device which converts dc power into ac power at desired output voltage and frequency is called as Inverter.
Inverters are broadly classified into
It is equivalent to a dc transformer in ac circuit. The Chopper is a static switch which is used to get the variable dc output voltage from a constant dc input voltage.
Step down chopper:
In this circuit, the average output voltage [VO = D. VS] is less than the input supply voltage. It is also known as Buck converter.
Step up chopper:
It is also known as Boost converter. Here the average output voltage [VO = VS / 1 – D] is more than the input supply voltage.
In load commutation, the load current flowing through the thyristor either becomes zero or is transferred to another device from the conducting SCR.
As the name indicates, to trigger these devices just a pulse is sufficient. Continuous gate voltage of entire on time is not required. The advantage of pulse triggering is, it will avoid the hard triggering.
Ex. Thyristor, GTO
Some of the level sensitive devices are
In order to keep these devices in the ON state condition, we have to apply gate current/voltage continuously to these devices.
In general, AC voltages and currents are mentioned in RMS values only. It is sensible to compare with steady DC voltages and currents.
For example 230V AC supply means, 230Vrms AC Supply.
To meet the high current demand we will connect the SCRs in a parallel manner.
Similarly to meet the high voltage demand we have to connect the SCRs in series.
The gate charge is defined as the amount of charge required for the device during turn-on and turn-off time. It is the most important parameter we have to consider while selecting the MOSFET. The switching speed of the MOSFET depends on the speed at which the gate driver can charge or discharge the input gate charge.
Thyristor Related Tutorials
|Power Electronics Tutorial|
Thyristor Related Interview Questions
|Electronic Circuits Interview Questions||Digital Electronics Interview Questions|
|Electrical Engineering Interview Questions||Power Electronics Interview Questions|
|Electronic Communications Interview Questions||EDI (electronic data Interchange) Interview Questions|
|Electrician Interview Questions||Electrical Machines Interview Questions|
|Electrical Power System Interview Questions||Electric Power Generation Interview Questions|
All rights reserved © 2018 Wisdom IT Services India Pvt. Ltd
Wisdomjobs.com is one of the best job search sites in India.