In a 3 phase full converter the average load current is 150 A. The average thyri

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Question
In a 3 phase full converter the average load current is 150 A. The average thyristor current is
Options
A. 150 A
B. 75A
C. 50 A
D. 25 A

Correct Answer

50 A

Explanation

Each thyristor conducts for one-third of one cycle.

Power Electronics problems

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1. A thyristor is reverse biased. A positive gate pulse is applied. The thyristor
Options
A. will be turned on
B. may or may not turn on
C. will not turn on
D. will turn on after sometime

3. A static induction thyristor
Options
A. is a majority carrier device
B. is a minority carrier device
C. either a majority carrier or minority carrier device
D. has a total number of 2 leads

5. The rated current of a thyristor is 40 A. The holding current will be about :
Options
A. 20 A
B. 1 A
C. 100 mA
D. 10 mA

8. In a 3 phase full wave regulator feeding resistance load connected in star, the possible range of firing angle a is
Options
A. 0 ? a ? 180�
B. 0 ? a ? 150�
C. 0 ? a ? 120�
D. 0 ? a ? 90�

9. In a single phase full wave converter (M - 2 connection), the rms transformer voltage is 300 V across each half of secondary. The PIV for each thyristor is
Options
A. 300 V
B.
C. 6002 V
D.

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