AC Machines

1. -Mr. M.N. Mestri
Department of Electrical Engineering,
ATS’S Sanjay Bhokare Group of
Institutes, Miraj.
mnmestri@gmail.com /
mestrimn@sbgimiraj.org
Electrical Machine-II

2. I. Basic Concepts in AC Machines.
II. Armature Winding.
III. Synchronous Machines.
IV. Three Phase Induction Motor.
V. Frictional Kilowatt Motors.
VI. Special AC Machines.
Syllabus Contents
-Mr. M.N. Mestri 2

3. Classification of A.C. Machines,
Principle of Operation and
Constructional Features of Synchronous and Induction Machines,
Rotating MMF Waves in A.C. Machines
Chapter 1st: Lecture 1st
Basic Concepts of AC Machines
-Mr. M.N. Mestri 3

4. Classification of AC Machines/Induction Machines:
-Mr. M.N. Mestri 4
AC Machines
Single Phase
Motors
Three Phase
Motors
Synchronous
Machines
Split Phase Motor
Capacitor Start
Capacitor Start-
Run
Shaded Pole
Squirrel Cage Wound Rotor/ Slip
Ring
Alternator
Motor
Single Cage
Double Cage

5. Constructional of Squirrel Cage Induction Motor:
-Mr. M.N. Mestri 5

6. Constructional of Laminated Rotor:
-Mr. M.N. Mestri 6

7. Constructional of Induction Machines Rotor:
-Mr. M.N. Mestri 7
Squirrel Cage I.M. Slip Ring/Wound Rotor I.M.

8. Constructional Features of Synchronous Machines:
-Mr. M.N. Mestri 8
Construction Winding
Rotor/Armature

9. Constructional Features of Induction Machines:
-Mr. M.N. Mestri 9

10. Classification of A.C. Machines,
Principle of Operation for Synchronous and Induction Machines,
Constructional Features of Synchronous and Induction Machines,
Rotating MMF Waves in A.C. Machines
Chapter 1st: Lecture 2nd
Basic Concepts of AC Machines
-Mr. M.N. Mestri 10

11. Constructional Features of Synchronous Machines:
-Mr. M.N. Mestri 11
Types of Synchronous Machines:
By Operation:
• Rotating Field Type
• Rotating Armature Type
By Rotor (Field) Construction:
• Silent Pole
• Non-Silent Pole

12. Constructional Features of Synchronous Machines:
-Mr. M.N. Mestri 12
Salient Pole/
Projected Pole
Non-Salient Pole/
Smooth Cylinder Type

13. Constructional Features of Synchronous Machines:
-Mr. M.N. Mestri 13
Salient Pole/
Projected Pole
Non-Salient Pole/
Smooth Cylinder Type

14. Constructional Features of Synchronous Machines:
-Mr. M.N. Mestri 14
Salient Pole/
Projected Pole
Non-Salient Pole/
Smooth Cylinder Type

15. Constructional Features of Synchronous Machines:
-Mr. M.N. Mestri 15

16. Difference between Synchronous and Induction
Machines:
-Mr. M.N. Mestri 16

17. Classification of A.C. Machines,
Principle of Operation for Synchronous and Induction Machines,
Constructional Features of Synchronous and Induction Machines,
RMF Waves in A.C. Machines
Chapter 1st: Lecture 3rd
Basic Concepts of AC Machines
-Mr. M.N. Mestri 17

18. It is a field produced in between stator and rotor of Induction
Machine.
Speed of RMF is always a synchronous speed (Ns).
When we provide 3 phase supply at stator of machine, Flux is
produced and linked with Rotor and EMF gets induced in rotor
which results in rotation of rotor, due to creation of current
carrying conductor at rotor side.
We Observe in detail in next video.
Rotating Magnetic Field
-Mr. M.N. Mestri 18

19. RMF Waves in A.C. Machines:
-Mr. M.N. Mestri 19

20. -Mr. M.N. Mestri 20
Thank You…