1
|
What is meaning of
commutation of SCR?
|
Commutation
|
|
2
|
Describe the different
methods of commutation of the SCR.
|
Commutation of the SCR
|
|
3
|
Describe the main
condition necessary to turn off the SCR.
|
The force commutation circuit turn off
time must be greater than the SCR turn off time.
|
|
4
|
Explain : Line commutation
OR
Explain : Natural
commutation
OR
Explain : AC commutation
|
Natural
( Line or AC ) commutation
|
|
4
|
Explain the term : Forced
commutation
|
Forced commutation
|
|
5
|
Explain the term :
Current commutation, Voltage commutation
|
Current
commutation
Voltage
commutation
|
|
6
|
Which commutation method
is known as self commutation?
|
Class A commutation and class B
commutation
|
|
7
|
Which commutation method
is known as resonant commutation? Why?
|
Resonant commutation
|
|
8
|
Give reason : Class A and
Class B commutation is known as current commutation.
|
Current commutation
|
|
9
|
Explain the term : Self
commutation
|
Self
commutation
|
|
10
|
Write the application of
class A commutation
|
Series inverter, Self commutated
inverter
|
|
11
|
Why the class A
commutation is used for high frequency applications?
|
Class A commutation
ω0 = 1 / √ ( LC )
|
|
12
|
Which commutation method
is also known as complementary commutation?
|
Class C
|
|
13
|
Which commutation method
is also known as voltage commutation?
|
Class C
|
|
14
|
Write the application of
Class C commutation.
|
Mcmurray Bedford inverter
|
|
15
|
Why the Class C commutation
is called as complementary commutation?
|
Complementary commutation
|
|
16
|
Which type of force
commutation requires minimum energy?
|
External pulse commutation or Class E
commutation
|
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Thyristors are an integral part of modern day electrical circuits. They are mainly used as switches (automatic or manual) and voltage converters.
ReplyDeleteA thyristor is a high-speed semiconductor device that is stimulated by light, heat, or electric current to turn on and off easily.
It works as a sort of two-way switch. When it's turned on, it can be more easily turned off than when it is off. If a regular diode were in the circuit instead of a thyristor, the current would constantly flow in one direction through the circuit. It would have to be physically disconnected in order to turn it off which can be difficult to do under certain conditions (e.g., with live electricity).