Module |
Lec no. |
Topics |
General Concepts of Conventional Rotating Machines. |
1 |
Introduction, scope of the course. Types of rotating machines- common underlying principle of operation. Torque production due to interaction of two sets of magnets. |
2 |
Conditions to be fulfilled for production of steady electromagnetic torque in conventional rotating machines. Concept of electrical & mechanical degrees. |
3 |
Operation of machines as motor or generator. Concept of loading a motor and generator. |
Introduction to Synchronous machines. |
4 |
Types of synchronous machines & their constructional features. Infinite bus & its concept. |
5 |
Armature winding, winding factors for 60 ° and 120° phase spread windings.Expression for induced voltage. |
6 |
Field mmf, armature mmf and resultant mmf. Space and time phasor diagrams for generator operation under no load and load conditions.Synchronous impedance. |
Synchronous Generators (Alternators). |
7 |
Salient pole and non salient pole generators and their uses in hydro and thermal power plants. |
8 |
Different methods of synchronisation with the bus. |
9 |
Complete phasor diagrams of non-salient pole synchronous generators connected to infinite bus for lagging , leading and upf loads. Regulation. |
10 |
Equivalent circuit and estimation of regulation by various methods viz. Synchronous impedance method, zpf method. |
11 |
Problem solving on regulation. |
12 |
Expression for input and output power. Simplified expression for power when armature resistance is neglected. P- δ characteristic and operating point. |
13 |
Circle diagram, O-curves and V-Curves and their implications. Effect of excitation variation. |
14 |
Stability of synchronous generator, Swing equation, hunting and equal area criteria. |
Synchronous Motors. |
15 |
Starting methods of synchronous motor: use of damper bars. |
16 |
Complete phasor diagrams under various power factors and expression of power. |
17 |
Circle diagram, O-curves and V-Curves and their implications. Effect of excitation variation. |
18 |
Stability of synchronous motor, Swing equation, hunting and equal area criteria. |
Salient pole synchronous motor & generator. |
19 |
Bondel's two reaction theory, direct axis and quadrature axis synchronous reactances. |
20 |
Phasor diagrams under different power factor conditions and expression for power for generator and motor modes. |
21 |
Reluctance power and phasor diagram with zero excitation for generator and motor modes. |
22 |
Slip test to estimate direct axis and quadrature axis synchronous reactances. |
23 |
Qualitative analysis of sudden short circuit phenomenon of synchronous generator. Transient and subtransient reactances. |
Single phase induction motor. |
24 |
General description of the motor and constructional features; Pulsating and Rotating fields. |
25 |
Analysis of single phase motor based on double revolvimg field theorem. |
26 |
Devolopment of equivalent circuit and torque expression. |
27 |
Torque slip characteristic and its features. |
28 |
Split phase induction motor incorporating starting torque. |
29 |
Selection capacitamce values for maximum torque. |
D.C Machines. |
30 |
Types of armature windings and parallel paths. |
31 |
D,C generator; EMF equation and torque equation. |
32 |
Shunt generator; voltage build up and load characteristics. |
33 |
Compound generator; problem solving. |
34 |
D.C shunt motor and its starting. |
35 |
Characteristics of shunt motors. |
36 |
Speed control of shunt motor. |
37 |
Braking of shunt motors: various methods.
D.C series motor and its characteristics |
38 |
Speed control of D.C series motor. |
39 |
Problem solving on D.C machines. |
40 |
Conclusions of the course. |