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Electronics and Communication Engineering - Power Electronics

Exercise : Power Electronics - Section 5
6.
A bridge type single phase cycloconverter changes the frequency f to f/3. Then one half wave of output contains
3 full waves of input
3 half waves of input
6 full waves of input
6 half waves of input
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
A half bridge inverter
needs a 3 wire dc supply
may use a two wire or 3 wire dc supply
has higher output voltage if fed from 3 wire dc supply
has higher efficiency if fed from 3 wire dc supply
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
A 3 phase series inverter has
12 thyristors
6 thyristors
3 thyristors
3 or 6 thyristors
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
In figure, thyristor Th is in off state. When thyristor is turned on, the peak thyristor current can be
5 A
10 A
15 A
20 A
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
HVDC systems are preferable for only long distances.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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