Define Electric Motor Drive. Draw the detailed block diagram of AC Motor Drive and explain its advantages and disadvantages over DC Motor Drive.
[7 marks]List the different types of Braking method of induction motor and explain any one in details with necessary diagram.
[7 marks]What is field oriented Control? List and define each type of it. Draw the Phasor diagram of the same and explain each nomenclature.
[7 marks]Explain the operation of induction motor on unbalanced source voltage.
[7 marks]Discuss induction motor’s behavior for non sinusoidal source voltage.
[7 marks]Explain operation of Closed loop control of static scherbius drive.
[7 marks]Compare FCCSI and LCCSI in terms of motor type, power, Speed range, accuracy, maximum speed, performance, advantage, disadvantage and application.
[ marks]Draw and explain block diagram of four quadrant closed loop speed control of – Ø induction motor using 3- Ø controller.
[7 marks]Compare Kramer Drive and PWM VSI in terms of motor type, power, Speed range, accuracy, maximum speed, performance, advantage, disadvantage and application.
[ marks]Draw and explain indirect vector control block diagram with open loop flux control
[7 marks]Explain the principle behind the variation of the speed of a 3-Ø Induction Motor by V/Fmethod. Discuss this for the following two modes : 1. Operation below rated frequency 2. Operation above rated frequency.
[7 marks]Draw and explain speed torque curve with variable frequency control for the following two modes : 1. Operation at constant flux 2. Operation with V/Fration constant.
[7 marks]Explain using a diagram, the working of a static scherbius system and also explain its advantages over static Kramer drive.
[7 marks]Explain principle of direct torque control scheme using necessary block diagram and switching logic.
[7 marks]Draw and explain sensor less control of sinusoidal SPM drive based on terminal voltage and current.
[7 marks]Draw and explain variable frequency PWM inverter drive with regeneration and minimum loss control.
[7 marks]Draw and explain four phase SRM drive using waveform explaining commutation angle generation for one phase.
[7 marks]