Introduction

1. Electrical Machines-II
6th Semester, EE and EEE
By
Dr. Binod Kumar Sahu
Associate Professor, Electrical Engg.
Siksha ‘O’ Anusandhan, Deemed to be University,
Bhubaneswar, Odisha, India
introduction

2. 2
Rotating Electrical Machines
ACDC
Permanent
Magnet
Wound
Field
Separately
Excited
Self
Excited
Synchronous Induction
Brushless DC
Hysteresis
Sine wave
Reluctance
Permanent
Magnet
Wound Field
Salient Pole
Non-salient
Pole
Three Phase
Single Phase
Wound Rotor Squirrel Cage
Split Phase Shaded Pole
Universal
Resistance
Start
Capacitor
Start
Capacitor Start
Capacitor Run

3. Topics to be covered: -
3
1. Three-Phase Alternator.
2. Three-Phase Synchronous Motor.
3. Starting & Breaking of DC Motor.
4. Starting, Breaking and Speed Control of three-phase Induction Motor.
5. Electronic Motors.
6. Motor Insulation System.
7. Motor Protection.

4. 4
Toipc-1 Alternator
Learning Outcomes: -
Students will be able to:
 Classify different types of alternators from application and construction point of
view.
 Know various terms related to three-phase AC winding.
 Analyse the effect of short-pitched and distributed winding.
 Analyse the effect of armature reaction.
 Determine voltage regulation of cylindrical pole type alternator using EMF, MMF
and ZPF method.
 Analyse the effect of saliency in salient pole alternator.
 Determine the voltage regulation in salient pole alternator.
 Know the process of synchronizing two alternators and one alternator with
infinite bus.
 Analyse the effect of varying excitation and mechanical power input on an
alternator operating in synchronism with another alternator or an infinite bus.

5. 5
Toipc-2 Synchronous motors
Learning Outcomes: -
Students will be able to:
 Know the principle of operation of synchronous motor.
 Understand the various starting methods employed for starting a synchronous
motor.
 Analyse the power angle equation for both types of synchronous motors.
 Analyse the effect of varying excitation and mechanical load on a synchronous
motor.
 Design the rating of a suitable synchronous motor for power factor improvement.

6. 6
Toipc-3 Starting and Braking of
DC Motor
Learning Outcomes: -
Students will be able to:
 Know the necessity of starter for a DC motor.
 Design a suitable starting resistance for a DC motor.
 Understand the various methods adopted for braking a DC motor and analyse the
behaviour of DC motor under various braking modes of operation.

7. 7
Toipc-4 Starting, Braking and
Speed Control of 3-Phase
Induction Motor
Learning Outcomes: -
Students will be able to:
 Know the necessity of starter for an induction motor.
 Analyse the various methods of starting an induction motor.
 Understand the various methods adopted for braking an induction motor and analyse
the behaviour of induction motor under various braking modes of operation.
 Know the various methods of speed control of an induction motor.

8. 8
Toipc-5 Electronic Motors
Learning Outcomes: -
Students will be able to:
 Understand the basic concept of electronic motors their types, working principles
and applications.

9. 9
Toipc-6 Motor insulation
systems
Learning Outcomes: -
Students will be able to:
 Know the various types of insulations available for motor system.
 Choose a proper insulation for a particular motor application.

10. 10
Toipc-7 Motor Protection
Learning Outcomes: -
Students will be able to:
 Know the various types of protection schemes available for electric motors to
improve their reliability.

11. 11
Thank you