Advanced Power Electronics (3170906) MCQs

MCQs of Multi-level Converters

Showing 21 to 30 out of 47 Questions
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21.

How many switches are always on simultaneously to produce a level in 5 level DCMLI?

(a)

2
(b)

4
(c)

6
(d)

8
Answer:

Option (b)

22.

For supply voltage Edc in m Level DCMLI, Each Switching device is required to block a voltage of ____ (m is no. of level)

(a)

Edc x (m-1)
(b)

Edc/m
(c)

(m-1)/Edc
(d)

Edc/(m-1)
Answer:

Option (d)

23.

True or False. When the number of levels is high enough, the harmonic content is low enough to avoid need of filters

(a)

True
(b)

False
Answer:

Option (a)

24.

No. of flying capacitor required to construct m level FCMLI is

(a)

(m-1)/2
(b)

(m-2)/2
(c)

[(m-1)(m-2)]/2
(d)

[(m-1)(m-2)]x2
Answer:

Option (c)

25.

3 level FCMLI needs _____________ dc bus capacitor/s.

(a)

1
(b)

2
(c)

3
(d)

4
Answer:

Option (b)

26.

How many IGBTs required to produce complete cycle waveform using 3 level FCMLI?

(a)

4
(b)

8
(c)

12
(d)

16
Answer:

Option (b)

27.

If Vdc is the supply given to 5 level FCMLI then what are the 5 levels can be produced by it?

(a)

0, -Vdc, Vdc, 3Vdc/4, Vdc/2
(b)

0, Vdc/4, Vdc/2, 3Vdc/4, Vdc
(c)

0, Vdc/4, Vdc/3, 3Vdc/4, Vdc
(d)

0, -Vdc/2, Vdc/2, 3Vdc/4, Vdc
Answer:

Option (b)

28.

In working of FCMLI, the switching devices  have unequal turn on time.

(a)

True
(b)

False
Answer:

Option (a)

29.

FCMLI has redundancy at ____________

(a)

Inner voltage levels
(b)

Outer voltage levels
(c)

For all voltage levels
(d)

none of these
Answer:

Option (a)

30.

Which of the following types of inverter does  provide modular structure?

(a)

DCMLI
(b)

FCMLI
(c)

Modified DCMLI
(d)

CHB
Answer:

Option (d)

Showing 21 to 30 out of 47 Questions
1 2 3 4 5