Exercise: Power Electronics

Questions for: Power Electronics

HVDC systems are preferable for only long distances.
A:
True
B:
False
C:
D:
Answer: A
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In figure, thyristor Th is in off state. When thyristor is turned on, the peak thyristor current can be
A:
5 A
B:
10 A
C:
15 A
D:
20 A
Answer: C
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A 3 phase series inverter has
A:
12 thyristors
B:
6 thyristors
C:
3 thyristors
D:
3 or 6 thyristors
Answer: B
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A bridge type single phase cycloconverter changes the frequency f to f/3. Then one half wave of output contains
A:
3 full waves of input
B:
3 half waves of input
C:
6 full waves of input
D:
6 half waves of input
Answer: B
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The specified maximum junction temperature of thyristors is about
A:
50°C
B:
80°C
C:
120°C
D:
200°C
Answer: C
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