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Fundamentals of DC Machines (4)
DC Machine Construction
Principle of Operation of a DC Motor (19:16)
Principle of Operation of a DC Generator (16:03)
Construction of a DC Machine (5:37)
Field Winding of a DC Machine (10:39)
Armature Core and Magnetic Path (10:51)
Commutator and Brushes (8:05)
Course Slides
Armature Windings in a DC Machine
Turn, Coil, and Winding (5:57)
Mechanical and Electrical Angles (11:40)
Pole, Coil, Full, and Short Pitch (3:37)
Single and Double Layer (9:03)
Example 1 (4:02)
Types of Armature Winding (9:16)
Lap Winding (15:06)
Wave Winding (10:03)
Types of Pitch in Windings (28:44)
Dummy Coils and Equalizer Rings (16:54)
Example 2 (16:11)
Example 3 (19:28)
Types of DC Generators
Induced E.M.F Equation (11:55)
Example 1 (2:35)
Example 2 (2:46)
Example 3 (7:57)
Example 4 (3:53)
Types of DC Generators (7:12)
Separately Excited DC Generator (17:42)
Characteristics of a Separately Excited DC Generator (15:17)
Example 5 (7:17)
Example 6 (5:34)
Example 7 (5:50)
Example 8 (4:16)
Shunt DC Generator (17:40)
Characteristics of a Shunt DC Generator (15:11)
Example 9 (3:00)
Example 10 (4:45)
Series Wound DC Generator (10:35)
Efficiency of a DC Generator (14:48)
Example 11 (7:08)
Example 12 (3:56)
Compound Wound DC Generator (18:10)
Example 13 (6:13)
Example 14 (3:19)
Armature Reaction in DC Machines (17:58)
Example 15 (2:35)
Interpoles in DC Machines (12:09)
Types of DC Motors
Speed Control of the Shunt DC Motor (13:34)
Shunt DC Motor – Torque-Speed Characteristics (9:46)
Speed Control Beyond Rated Speed (8:10)
Series DC Motor – Torque-Speed Characteristics (12:06)
Example 1 (8:18)
Example 2 (6:18)
Starting of DC Machines (7:23)
Example 3 (17:57)
Types of Pitch in Windings
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