Power Electronics

Introduction to Solid State Devices:

  1. Characteristics and switching behavior of Diode.
  2. dynamic characteristics of SCR during turn ON and turn OFF,
  3. firing circuits of SCR,
  4. Protection of SCR against over current,
  5. Protection of SCR against over voltage,
  6. Protection of SCR against high dV/dt,
  7. Protection of SCR against high dI/dt,
  8. Protection of SCR against thermal protection,
  9. methods of commutation,
  10. series and parallel operation of SCR.

Single-Phase Converter:

  1. Classification of rectifiers,
  2. uncontrolled and controlled converter,
  3. single phase half wave converter,
  4. 2-pulse mid-point converter,
  5. half controlled and fully controlled bridge converter and their performance parameters,
  6. effect of load and source impedance on the performance of converter,
  7. expression of output voltage,
  8. effect of free-wheeling diode,
  9. triggering circuits.

Dual-Converter:

  1. single-phase Control principle,
  2. circulating current and circulating current free modes of operation of single-phase dual converter,
  3. three phase dual converter.

Three-phase Converter:

  1. half wave,
  2. full wave,
  3. half controlled and fully controlled bridge converters with performance characteristics with R, RL and RLE load.

AC Regulator and Cycloconverter:

  1. Principle of operation and control,
  2. effect of load inductance on single phase AC regulator,
  3. operating principle and control of single phase to single phase cycloconverter,
  4. with resistive load,
  5. three-phase cycloconverter.

Choppers:

  1. Classification of choppers,
  2. principle of operation,
  3. steady state analysis of class- A chopper,
  4. step up chopper,
  5. continuous and discontinuous mode of operation,
  6. expression for average output voltage and current,
  7. Buck, Boost converters,
  8. current commutated and voltage commutated chopper.

Inverter:

  1. single phase half bridge and full bridge inverter,
  2. series and parallel inverter,
  3. modified McMurray inverter,
  4. voltage control in single phase inverters,
  5. PWM inverter,
  6. reduction of harmonics,
  7. current source inverter,
  8. three phase bridge inverter output voltage and current with R and RL Load,
  9. sizing calculation of inverter for large size Renewable energy sources.