EE6503 POWER ELECTRONICS IMPORtANT QUESTIONS
Unit I
- V - I characteristics and switching characteristics of SCR
- V - I characteristics and switching characteristics of MOSFET
- V - I characteristics and switching characteristics of IGBT
- Commutation circuits of SCR — Class A, Class B, Class E,
Unit II
- Working of single phase half controlled converter with various loads
- Working of single phase full controlled converter with various loads
- Working of three phase half controlled converter with various loads
- Working of three phase full controlled converter with various loads
- Working of dual converter.
Unit III
- Working principle of step down and step-up choppers
- Derivation for buck regulator Derivation for boost regulator
- Derivation for buck-boost regulator
Unit IV
Working of three phase inverter in both 120 and 180 mode with heat waveforms.- Working of single phase inverter
- Working of series inverters.
- Sinusoidal PWM and modified sin PWM techniques
- Space vector modulation .
Unit V
- Working of single phase AC voltage control arlous loads.
- Working of step down Cycloconverter.
- Working of step up Cycloconverter.
- Three phase to single phase Cycloconverter.
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