Write emf balance equation and derive torque equation of DC motor.
[3 marks]Discuss armature control method for speed control of DC motor.
[4 marks]Derive basic equations for DC motors. Draw performance characteristics for DC shunt, DC separately excited and DC series motor.
[7 marks]Discuss operation of chopper controlled separately excited DC motor drive in motoring mode.
[3 marks]Discuss various losses taken place in DC motor drive.
[4 marks]Derive basic modeling of DC motor with necessary assumptions. Draw block diagram from the derived functions.
[7 marks]Describe four quadrant chopper controlled operation of DC motor drive with necessary diagram and wave forms.
[7 marks]How smooth starting is obtained for DC motor using chopper control?
[3 marks]Discuss regenerative braking control of DC separately excited motor using chopper.
[4 marks]Discuss closed loop control of DC motor drive.
[7 marks]Discuss need of various PWM techniques over conventional 180° conduction mode for induction motor drive.
[3 marks]Derive speed controller and current controller design for DC motor drive.
[4 marks]Discuss power electronics based rotor side control of slip ring induction motor.
[7 marks]Draw equivalent circuit of three phase induction motor with necessary nomenclature.
[3 marks]Discuss stator voltage control method for speed control of induction motor.
[4 marks]Explain SPWM technique for voltage source inverter.
[7 marks]Develop the speed-torque characteristics of induction motor in four quadrants.
[3 marks]Discuss operation of induction motor for fan and pump type load.
[4 marks]Explain Space Vector PWM technique for voltage source inverter.1
[7 marks]What is above base speed and below base speed operation of the motor?
[3 marks]Discuss effect of variation in rotor resistance on induction motor performance.
[4 marks]Discuss principle of V/f control of induction motor in detail with necessary equation and diagram.
[7 marks]Draw and discuss motor characteristics for constant torque and flux weakening region.
[3 marks]What is slip power recovery? How it can be used for speed control of induction motor?
[4 marks]Explain closed loop Volt/Hz control of induction motor.
[7 marks]