UNIT - IV
AC - AC CONVERTERS (AC VOLTAGE CONTROLLERS) & FREQUENCY
CHANGERS (CYCLO-CONVERTERS):
AC voltage controllers
–
Single
phase two
SCR’s in anti
-parallel
–
With
R and RL loads
–
modes of operation
–
Derivation
of RMS
load voltage, current and power factor wave forms -Numerical problems - Cyclo converters
–
Types- R and RL loads (Principle of operation only)
–
Bridge configuration of single phase
cyclo converter (Principle of operation only)
–
Waveforms.
UNIT - V:
DC - AC CONVERTERS (INVERTERS):
Inverters
–
Single phase inverter
–
Basic series
inverter - operation and waveforms - Three phase inverters (120, 180 degrees conduction
modes of operation) - Voltage control
techniques for inverters, Pulse width modulation
techniques - Numerical problems.
TEXT BOOKS:
1.
Power Electronics, Dr. P. S. Bimbhra, Khanna Publishers
2.
Power Electronics, M. D. Singh & K. B. Kanchandhani, Tata Mc Graw - Hill Publishing
Company.
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