Electrical Machines-II (Diploma)

Three-phase induction motors, synchronous machines, single-phase motors and special machines.

6 MonthsDuration 6Chapters29Topics

Enquire now

Syllabus · पाठ्यक्रम

Download PDF

01Three-Phase Induction Motors 5 topics

Construction: squirrel cage and slip ring
Rotating magnetic field and synchronous speed
Slip and rotor frequency
Torque equation and torque-slip characteristics
Power flow, losses and efficiency

02Starting and Speed Control of Induction Motors 5 topics

Need of starters
DOL, star-delta and autotransformer starters
Rotor resistance starter
Speed control methods
Variable frequency drives

03Alternators 5 topics

Construction: salient and cylindrical rotor
EMF equation, pitch and distribution factors
Armature reaction
Voltage regulation by EMF method
Synchronisation and parallel operation

04Synchronous Motors 5 topics

Principle and why it is not self-starting
Starting methods
Effect of excitation, V and inverted V curves
Synchronous condenser
Hunting and damper winding

05Single-Phase Motors 5 topics

Double revolving field theory
Split phase and capacitor start motors
Capacitor-run and capacitor start-run motors
Shaded pole motor
Universal motor

06Special Machines 4 topics

Stepper motor
AC and DC servo motors
BLDC motor
Linear induction motor

About

You will be able to

Explain the rotating magnetic field, slip, torque and torque-slip characteristics of three-phase induction motors
Select starters and speed control methods including VFDs for induction motors
Explain alternator construction, EMF equation, regulation and parallel operation
Explain synchronous motor starting, V-curves and use as a synchronous condenser
Explain single-phase induction, universal and shaded pole motors
Describe special machines such as stepper, servo and BLDC motors

Who it is for

Diploma Electrical Engineering students of Semester 4 (BTEUP)
Students preparing for JE (Electrical) exams

What you need

Electrical Machines-I of Semester 3

Questions

Is the lab separate?

Yes. Machine tests are done in the Electrical Machines-II Lab; this course covers the theory paper.

Are VFDs and BLDC motors included?

Yes. Modern drives and special machines are covered as per the revised syllabus.

Is this course based on the BTEUP syllabus?

Yes. The units follow the BTEUP (Board of Technical Education, Uttar Pradesh) diploma syllabus. If your polytechnic follows a different board or a revised scheme, the centre teaches your own syllabus.