Characteristics of Power Electronic devices, phase control, bridge converters, choppers and inverters, basic concepts of adjustable speed drives.
Resistive load
Back e.m.f load
Inductive load
Resistive inductive load
Natural
Forced
Depends on power
None of these
1 stage
2 stage
3 stage
None of these
Induction heating
UPS
None of these
Both
Load inductance
Harmonic content of load current
Switching operator in the converter
Source inductance
GTO
MOSFET
TRIAC
THYRISTOR
1-phase full converter
3-phase half wave converter
3-phase semi converter
3-phase full converter
0.1
0.3
0.5
0.7
BJT
IGBT
MOSFET
GTO
High current
High rate of rise of current
High temperature rise
High rate of raise of voltage
1-quadrant chopper
Cyclo converter
Inverter
Bi-directional rectifier
High power,high speed
Low power,low speed
Low power,high speed
High power,low speed
Low power
Medium power
High power
None of these
Static characteristics
Junction capacitance
Current gain
None of these
Thyristor
MOSFET
TRIAC
UJT
Sine wave
Saw-tooth wave
Trapezoidal wave
Square wave
30 degrees
60 degrees
90 degrees
0 degrees
1/2*I
1/3*I
1/4*I
I
A symmetrical thyristor
A conventioanal thyristor
Power bipolar junction transistor
Gate turn-off thyristor
Low reactive power loading on the source
Better efficiency in conversion
Low switching frequency operation of devices
Cost reduction in converter realization
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