In a three-phase-semiconverter
I. For firing angle less than or equal to 60°, freewheeling diode conducts for
zero degree
II. For firing angle equal to 120°, and extinction angle equal to 110° freewheeling diode conducts for 50°.
III. The output SCRs are triggered at intervals of 60°. Combinations:
A. I and II
B. II and III
C. I and III
D. I, II and III
Show Answer
Answer: A
Share your understanding of this question with the correct explanation.