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Fundamentals of DC Motor
Introduction
Course Intro (1:42)
Fundamental Concept of How DC Motor Works
Parameters of Electrical & Mechanical System (3:59)
Representation of Electric Motor as Block Diagram (1:09)
Force produced by Permanent Magnet (1:40)
How electric current produces force? (7:41)
Current Carrying Conductors Placed in Magnetic Field (4:54)
Requirement of Arrangement to Produce Unidirectional Torque (4:35)
How to Supply Electric Current to Rotating Coil (4:12)
Maintaining Direction of Current with Commutator (4:01)
Conclusion (1:19)
Basic Parts of DC Motor
Basic Parts of DC Motor (4:18)
Role of Faraday’s law and Lenz’s law in DC Motor (Back emf).
Role of Faraday’s law and Lenz’s law in DC Motor (Back emf). (4:29)
Mathematical Representation
Speed Torque Equation (9:50)
Graphical Representation (2:10)
Speed Control Methods
Effect of Supply Voltage (1:39)
Effect of Adding Resistance to Armature Winding (2:19)
Effect of Adding Resistance to Field Winding (4:58)
Summary
Summary (1:47)
DC Series Motor
DC Series Motor (13:31)
Speed Torque Characteristics of DC Series Motor (7:25)
More About DC Motor
Introduction (0:59)
Controversy Effect: “Effect of Field Flux on Motor Torque” (3:27)
Equation of Force (3:55)
Shape and Equation of Back Emf (4:45)
Average Value of Back Emf (2:25)
Power Transfer (6:07)
Shaft Torque (1:03)
Applications & Limitations (1:34)
Demonstrations & Practicals
PMDC Motors (6:05)
Equation of Force
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