Power semiconductor drives-EEE(3-2)

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Power semiconductor drives

16EE223

UNIT- I
CONVERTER FED DC MOTORS
Introduction to Thyristor Controlled Drives, Single Phase, Three 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 Characteristic, Problems.

UNIT- II
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.

UNIT- III
CHOPPER FED DC MOTORS
Single Quadrant, Two Quadrant and Four Quadrant Chopper Fed DC Separately Excited and
Series Excited Motors , Continuous Current Operation, Output Voltage and Current Wave
Forms , Speed – Torque Expressions, Speed – Torque Characteristics , Problems on Chopper
Fed D.C Motors, Closed Loop Operation.

UNIT -IV
CONTROL OF INDUCTION MOTOR
Induction Motor Stator Voltage Control and Characteristics by AC Voltage Controllers,
Waveforms, Speed – Torque Characteristics, Stator Frequency Control and Characteristics 
Voltage Source and Current Source Inverter and Cycloconverters, PWM Control
,Comparison of VSI and CSI Operations ,Speed – Torque Characteristics, Closed Loop
Operation of Induction Motor Drives ,Static Rotor Resistance Control ,Slip Power Recovery,
Static Scherbius Drive, Static Kramer Drive –Their Performance and Speed – Torque
Characteristics ,problems and Applications.

UNIT -V
CONTROL OF SYNCHRONOUS MOTORS
Self and separate Control of Synchronous Motors ,Operation of Self Controlled Synchronous
Motors-VSI and CSI Fed Cycloconverters. Load Commutated CSI Fed Synchronous Motor,
Operation, Waveforms – Speed – Torque Characteristics, Closed Loop Control Operation of
Synchronous Motor Drives, Variable Frequency Control-PWM, VSI, CSI, Problems and
applications.

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