Power Semiconductor Drives JNTU Syllabus
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY
IV Year B.Tech EEE I-Sem T P C
4+1* 0 4
POWER SEMICONDUCTOR DRIVES
This course is an extension of Power Electronics applications to AC and DC drives. Control of DC motor
drives with single phase and three phase converters and choppers are given in detail. The control of AC
motor drives with variable frequency converters and variable voltage are presented.
UNIT – I: Control of DC motors by Single phase Converters
Introduction to Thyristor controlled Drives, Single Phase semi and Fully controlled converters connected to
d.c separately excited and d.c series motors – continuous current operation – output voltage and current
waveforms – Speed and Torque expressions – Speed – Torque Characteristics- Problems on Converter
fed d.c motors.
UNIT-II: Control of DC motors by Three phase Converters
Three phase semi and fully controlled converters connected to d.c separately excited and d.c series
motors – output voltage and current waveforms – Speed and Torque expressions – Speed – Torque
characteristics – Problems.
UNIT – III: Four Quadrant operation of DC Drives
Introduction to Four quadrant operation – Motoring operations, Electric Braking – Plugging, Dynamic and
Regenerative Braking operations. Four quadrant operation of D.C motors by dual converters – Closed
loop operation of DC motor (Block Diagram Only)
UNIT-IV: Control of DC motors by Choppers
Single quadrant, Two –quadrant and four quadrant chopper fed dc separately excited and series excited
motors – Continuos current operation – Output voltage and current wave forms – Speed torque
expressions – speed torque characteristics – Problems on Chopper fed d.c Motors – Closed Loop
operation ( Block Diagram Only)
UNIT – V: Control of Induction Motor through Stator voltage
Variable voltage characteristics-Control of Induction Motor by Ac Voltage Controllers – Waveforms –
speed torque characteristics.
UNIT – VI : Control of Induction Motor through Stator Frequency
Variable frequency characteristics-Variable frequency control of induction motor by Voltage source and
current source inverter and cyclo converters- PWM control – Comparison of VSI and CSI operations –
Speed torque characteristics – numerical problems on induction motor drives – Closed loop operation of
induction motor drives (Block Diagram Only)
UNIT –VII: Control of Induction motor of Rotor side
Static rotor resistance control – Slip power recovery – Static Scherbius drive – Static Kramer Drive – their
performance and speed torque characteristics – advantages applications – problems
UNIT – VIII: Control of Synchronous Motors
Separate control & self control of synchronous motors – Operation of self controlled synchronous motors
by VSI and CSI cycloconverters. Load commutated CSI fed Synchronous Motor – Operation – Waveforms
– speed torque characteristics – Applications – Advantages and Numerical Problems – Closed Loop
control operation of synchronous motor drives (Block Diagram Only), variable frequency control,
Cyclo converter, PWM, VFI, CSI
1. Fundamentals of Electric Drives – by G K Dubey Narosa Publications
2. Power Electronic Circuits, Devices and applications by M.H.Rashid, PHI.
1. Power Electronics – MD Singh and K B Khanchandani, Tata – McGraw-Hill Publishing company,1998
2. Modern Power Electronics and AC Drives by B.K.Bose, PHI.
3. Thyristor Control of Electric drives – Vedam Subramanyam Tata McGraw Hill Publilcations.
4. A First course on Electrical Drives – S K Pillai New Age International(P) Ltd. 2nd Editon.