Power Electronics Important Questions and Answers:
1. Define ” Turn off time” of SCR.
Answer:
Turn off time of SCR composed of three intervals delay time tdf, initial fall time tf1, and final fall time tf2
toff = tdf + tf1 + tf2
2. What is meant by line commutated inverter?
Answer:
Phase Controlled converters when operated in the inverter mode, are called line commutated inverter.
3. What are the advantages of SMPS over factors controlled rectifiers?
Answer:
- Small size and less weight
- High Efficiency
- Less sensitive to input voltage variations.