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Electronics and Communication Engineering - Power Electronics

Exercise : Power Electronics - Section 5
36.
In a single phase full wave ac regulator using two thyristors only, the gate circuits of the two thyristors
must be isolated
may or may not be isolated
should be preferably, isolated
should not be isolated
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
The circuit in figure is for
resonant commutation
line commutation
auxiliary commutation
complementary commutation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
A fully controlled bridge converter is feeding an RLE load. For some circuit conditions firing angle is 47°. If connections of battery are reversed, the firing angle is likely to be
47°
less than 47°
more than 47°
either more or less than 47°
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
In a single phase half wave converter feeding resistive load and full wave converter (M - 2 connection) feeding a resistive load the circuit conditions are similar. The firing angle is a. Then the waveshapes of voltages across thyristors
are similar
are not similar
may be similar or dissimilar
are similar only for some values of a
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
In a 3 phase full converter feeding a highly inductive load, the average load current is 150 A. The peak current through thyristor is
150 A
75 A
50 A
300 A
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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