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Electronics and Communication Engineering - Power Electronics

Exercise : Power Electronics - Section 3
21.
In the below figure the rms voltage across each half of secondary is 200 V. The peak inverse voltage across each of thyristor is
200 V
2(200) V
2(400) V
800 V
Answer: Option
Explanation:

PIV = 2(2 x 200).

22.

Assertion (A): A GTO circuit is more compact than SCR circuit

Reason (R): A GTO can be turned off by negative gate pulse.

Both A and R are correct and R is correct explanation of A
Both A and R correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Answer: Option
Explanation:

Since commutation circuit is not required, GTO circuit is compact.

23.
In a single phase full wave ac regulator, the firing angles in the two half cycles
are always equal
are sometimes equal
are never equal
may be equal or unequal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
In a single phase full bridge converter (B - 2 connection), the input voltage is v = Vm sin ωt. The output dc voltage for resistive load
Answer: Option
Explanation:

SCRs conduct from a to p in each half cycle.

25.
As regards single phase dual converter
the change in operation from one quadrant to the other is faster in non-circulating current mode
the change in operation from one quadrant to the other is faster in circulating current mode
the time response to change in operation from one quadrant to other is the same in both the modes
the time response to change in operation from one quadrant to the other may be faster in any of the two modes
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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