JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• To understand the concepts and control strategies of permanent magnet synchronous motors and Brushless DC motors. 
• To study the operating principles and control methods of switched reluctance motors.
• To introduce the concepts and control of different types of stepper motors and its applications.
• To analyze the working of linear induction and linear synchronous machines

Course Outcomes

After completion of the course, students will be able to:

• Optimally design magnetics required in special machines-based drive systems
• Develop new control strategies open and closed loop control for different types of special machines. 
• Design and conduct experiments towards research and to solve practical problems 
• Develop and analysis of the controllers for special electrical machine. 
• Analyze and Design Power converters and control techniques for control of special machines. 

UNIT - I

STEPPER MOTORS: Constructional features, Principle of operation, Variable Reluctance (VR) stepping motor-Single Stack, Multi-Stack, Permanent Magnet Step motor, Hybrid Step Motor, Torque Equation Open Loop Drive, Open loop and closed loop control of Step Motor, Applications.

UNIT - II

SWITCHED RELUCTANCE MOTORS: Constructional features, Principle of Operation, Torque equation, Torque-speed characteristics, Power Converter for SR Motor-Asymmetrical converter, DC Split converter, Control of SRM, Rotor Position sensors, Current Controllers, Applications.

UNIT - III

PERMANENT MAGNET SYNCHRONOUS MOTOR: Permanent magnets and their characteristics, Machine Configurations-SPM, SIPM, IPM and Interior PM with circumferential, Sensorless control, Applications.

UNIT - IV

BRUSHLESS DC MOTOR: Construction, Principle of Drive operation with inverter, Torque speed Characteristics, Closed loop control, Sensorless control, Applications. .

UNIT - V

LINEAR INDUCTION MOTORS AND LINEAR SYNCHRONOUS MOTORS: Linear induction motor, Construction details, LIM Equivalent Circuit, Steps in design of LIM, Linear Synchronous Motor: Principle and Types of LSM, LSM Control, Applications.

TEXTBOOKS:

• 1. R.Krishnan, Electric Motor Drives, Pearson, 2007
• 2. B.K.Bose, Modern Power Electronics and AC Drives, PHI, 2005

REFERENCES:

• 1. Venkataratnam, Special electrical Machines, University Press, 2008
• 2. E.G.Janardanan, Special Electrical Machines, PHI, 2014. M. Tech – II Semester L T P C 3 0 0 3