Syllabus Electrical Machines MIT ADT University Pune

Syllabus Electrical Machines MIT ADT University Pune

Syllabus Electrical Machines:2nd Year, Mechanical Engineering, MIT ATD University, Pune

·    Magnetic circuit, mutual induced EMF, Dynamically induced EMF, Direction of magnetic field in current carrying conductor, Flemings LHR & RHR, Electromechanical energy conversion.
·Must have knowledge of semiconductor material, basic electronics, diode, BJT and different  characteristics
·Working of  rectifier, concept of root mean square and average value.
Course Objectives:
·To understand the construction, working rule, operation of DC Machine& Induction Machine and its selection for specific applications.
·    Learn performance of three phase and single phase induction motor.
·      Learn construction, working principle of three phase synchronous motorand its operation under different conditions
·      To enable students to gain knowledge and understanding of fundamentals of power semiconductor devices and  its characteristics.
·      To understands the modes of operation of drive in various applications.
UNIT -I:  D.C. MACHINES                       
Construction, working principle of D.C. generator, emf equation of D. C. generator, working principle of D.C. motor, types of D.C. motor, back emf, torque equation for D.C. motor, characteristics of D.C. motor (series and shunt only), three-point starter for D.C shunt motor, methods for speed control of D.C. shunt motor and DC series motors, industrial applications. Special purpose motors: Construction, working principle, characteristic and applications of stepper motors ,A.C. and D.C servomotors(and its control circuit), universal motors, brushless DC motors(and  its sensor and  controller),

Constructional feature, working rule of three phase induction motors, types; torque equation, torque slip characteristics; power stages; efficiency, starters (auto transformer starter, star delta starter); methods of speed control and industrial applications. Different Types of Single phase induction motors, construction, working principle of split phase and shaded pole type induction motors, applications. Specifications of induction motors (KW rating, rated voltage, current rating, frequency, speed, class of insulation), linear induction motors.

UNIT -III:  SYNCHRONOUS MOTOR                  
Principle of operation. Methods of starting. Pull-in and pull-out torques. Equivalent circuit, significance of rotor/torque angle and torque equation. Losses, efficiency and Power flow chart. Operation of 3-phase Synchronous motor with constant excitation and variable load.Operation with constant load and variable excitation (‘V’ Curves and ‘inverted V’ curves).Applications of 3-ph synchronous motors.

SCR & TRIAC:- Construction detail, V-I Characteristics, Methods to turn ON, switching action during ON & OFF, specification, Concept of commutation of SCR and applications. DIAC:- Construction, V-I Characteristics. MOSFET & IGBT  :- Construction, transfer Characteristics, output characteristics, Methods to turn ON & OFF, applications. TO:- Construction ,working and characteristic.

Drives:- Advantages of Electrical Drives, Individual & Group drives, selection of drives depending on load characteristics. Single phase full converter fed D.C. Drives, Three phase converter fed D.C. Drives, Chopper Drives: two quadrant chopper drives & four quadrant chopper drives,
Speed Control:-stator voltage control of three phase induction motor, frequency control of three phase induction motor, V/F control of three phase induction motor.
Course Outcomes: Upon successful completion of this course, the students will be able to:-
·   Select machine for specific applications.
· Explain construction & working principle of three phase synchronous machines and demonstrate its operation at constant load and variable excitation & vice versa.
· Analyze characteristics of different power electronic switching devices
·      Understand drive and its application.
·      Dr. P.S. Bhimbra, “Power Electronics”, Khanna Publication.

·      A.E. Fitzgerald, Charles Kingsley, Stephen D, “Electrical Machines”, TMH Publication Ltd. Fifth Edition.
·      Dr. P. S. Bimbhra, “Power Electronics”, Khanna Publishers, Delhi.

List of Tutorial
List of Tutorials: To perform any eight tutorial from the following list

1.Performance and  Study of VSI fed 3 phase Induction motor (using V/f control PWM inverter) speed control characteristics.
2. Perform and study Static VI characteristic of SCR /GTO
3. Perform and study  Output and Transfer Characteristic of MOSFET and IGBT (Both)
4. Perform and Study speed control characteristics of single phase fully converter fed separately excited D.C. motor
5. Perform and study Static VI characteristic of TRIAC
6.Simulation of three phase induction motor on MATLAB to obtain its performance.
7. Speed control of D.C. Shunt motor and study of starters.
8. Load test on 3-phase induction motor.
9. Perform and study V and inverted V curve of synchronous motor at constant load.
10. Load characteristics of D.C. series motor.
11.Load test on three phase synchronous motor.

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